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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC)

CPC
COOPERATIVE PATENT CLASSIFICATION
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TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION( typewriters B41J; order telegraphs, fire or police telegraphs G08B; visual telegraphy G08B, G08C; teleautographic systems G08C; ciphering or deciphering apparatus per se G09C; coding, decoding or code conversion, in general H03M; arrangements common to telegraphic and telephonic communication H04M; selecting H04Q )
NOTE
-
This subclass covers transmission of signals having been supplied in digital form and includes data transmission, telegraphic communication and methods or arrangements for monitoring.

WARNING
-
The following IPC groups are not used in the CPC scheme. Subject matter covered by these groups is classified in the following CPC groups:
H04L12/20 covered by H04L 29/00
H04L25/04 " H04L 25/03
H04L25/17 " H03H
H04L25/18 " H04L25/02G1C
H04L25/28 " H04L25/02G1A
H04L25/30 " H04L 25/061
H04L25/32 " H04L 25/49
H04L25/34 " H04L 25/4917
H04L25/36 " H04L25/02A
H04L25/48 " H04L 25/49
H04L25/50 " H04L25/02A
H04L25/52 " H04L 25/20
H04L25/54 " H04L 25/20
H04L25/56 " H04L 25/202
H04L25/58 " H04L 25/20
H04L25/60 " H04L 25/207
H04L25/62 " H04L 25/205
H04L25/64 " H04L 25/245
H04L25/66 " H04L 25/247

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Arrangements for detecting or preventing errors in the information received( correcting synchronisation H04L 7/00 ;
{
for digital computers G06F 11/00
}
; arrangements in the transmission path H04B )
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.
{
Systems modifying transmission characteristics according to link quality, e.g. power backoff( adaptive data allocation for multicarrier modulation H04L 5/0044 ; controlling transmission power for radio systems H04W 52/04 )
}
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. .
{
by adapting the transmission rate
}
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. . .
{
by switching between different modulation schemes
}
. . . .
{
applied to control information
}
. . . .
{
applied to payload information
}
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. .
{
by adapting the transmission format
}
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. . .
{
by modifying the frame length
}
H04L 1/0008
. . . .
{
by supplementing frame payload, e.g. with padding bits
}
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. .
{
by adapting the channel coding( H04L 1/1812 takes precedence )
}
. . .
{
applied to control information
}
. . .
{
applied to payload information
}
. . .
{
Rate matching, e.g. puncturing or repetition of code symbols
}
. .
{
by adapting the source coding
}
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. .
{
characterised by the adaptation strategy
}
. . .
{
involving special memory structures, e.g. look-up tables
}
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. . .
{
where the mode-switching is based on Quality of Service requirement
}
. . . .
{
based on latency requirement
}
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. . .
{
in which mode-switching is based on a statistical approach
}
. . . .
{
Algorithms with memory of the previous states, e.g. Markovian models
}
. . . .
{
in which the algorithm uses adaptive thresholds
}
. . .
{
in which mode-switching is influenced by the user
}
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. .
{
characterised by the signalling
}
. . .
{
Transmission of mode-switching indication
}
. . .
{
Transmission of channel quality indication
}
H04L 1/0027
. . .
{
Scheduling of signalling, e.g. occurrence thereof
}
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. . .
{
Formatting
}
. . . .
{
Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling( power control H04W 52/04 )
}
H04L 1/003
. . . .
{
Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
}
. . . .
{
Multiple signaling transmission( H04L 1/1664 ,F15 take precedence )
}
. . .
{
Without explicit signalling
}
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. .
{
arrangements specific to the transmitter
}
. . .
{
where the transmitter decides based on inferences, e.g. use of implicit signalling
}
H04L 1/0035
. . .
{
evaluation of received explicit signalling
}
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. .
{
arrangements specific to the receiver
}
. . .
{
Blind format detection( for detection of modulation format H04L 27/0012 )
}
. . .
{
other detection of signalling, e.g. detection of TFCI explicit signalling( H04L 1/0046 , H04L 27/0012 and H04L 25/0262 take precedence )
}
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.
{
by using forward error control( H04L 1/0618 takes precedence; coding, decoding or code conversion, for error detection or correction H03M 13/00 )
}
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. .
{
Arrangements at the transmitter end
}
. . .
{
Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape( H04L 1/0067 takes precedence )
}
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H04L 1/0043
. . .
{
Realisations of complexity reduction techniques, e.g. use of look-up tables
}
H04L 1/0044
. . . .
{
specially adapted for power saving
}
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. .
{
Arrangements at the receiver end
}
. . .
{
Code rate detection or code type detection( H04L 1/0038 takes precedence; detection of the data rate H04L 25/0262 ; for packet format H04L 1/0091 )
}
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. . .
{
Decoding adapted to other signal detection operation( in conjunction with sequence estimation or equalization H04L 25/03286 )
}
. . . .
{
in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder( for spatial equalizer H04L 25/03286 )
}
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. . . .
{
Iterative decoding, including iteration between signal detection and decoding operation
}
H04L 1/0051
. . . . .
{
Stopping criteria
}
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H04L 1/0052
. . .
{
Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
}
H04L 1/0053
. . . .
{
specially adapted for power saving
}
. . .
{
Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
}
H04L 1/0055
. . .
{
MAP-decoding
}
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. .
{
Systems characterized by the type of code used( H04L 1/08 takes precedence )
}
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. . .
{
Block codes( H04L 1/0061 , H04L 1/0064 take precedence )
}
. . . .
{
Block-coded modulation
}
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H04L 1/0059
. . .
{
Convolutional codes
}
. . . .
{
Trellis-coded modulation
}
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H04L 1/0061
. . .
{
Error detection codes
}
H04L 1/0063
. . . .
{
Single parity check
}
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H04L 1/0064
. . .
{
Concatenated codes
}
H04L 1/0065
. . . .
{
Serial concatenated codes
}
H04L 1/0066
. . . .
{
Parallel concatenated codes
}
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. . .
{
Rate matching( H04L 1/0013 and H04L 1/08 take precedence )
}
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H04L 1/0068
. . . .
{
by puncturing
}
. . . . .
{
Puncturing patterns
}
. . .
{
Unequal error protection( for format H04L 1/0078 ; for codes per se H03M 13/35 )
}
. . .
{
Use of interleaving( interleaving per se H03M 13/27 )
}
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. .
{
Error control for data other than payload data, e.g. control data
}
. . .
{
Special arrangements for feedback channel
}
. .
{
Transmission of coding parameters to receiver( H04L 1/0023 takes precedence )
}
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. .
{
Distributed coding, e.g. network coding, involving channel coding( coding in both space and time H04L 1/0618 ; cooperative diversity H04B 7/022 )
}
H04L 1/0077
. . .
{
Cooperative coding
}
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.
{
Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location( forward error control, e.g. FEC, CRC H04L 1/004 ; adaptive formatting H04L 1/0006 ; mappings H04L 27/00 )
}
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. .
{
Formats for control data( H04L 1/16 takes precedence; training sequences H04L 25/00 and H04L 27/00 )
}
H04L 1/008
. . .
{
where the control data relates to payload of a different packet
}
H04L 1/0081
. . .
{
Formats specially adapted to avoid errors in the feedback channel( H04L 1/1607 takes precedence )
}
. . .
{
fields explicitly indicating existence of error in data being transmitted, e.g. so that downstream stations can avoid decoding erroneous packet; relays
}
H04L 1/0083
. .
{
Formatting with frames or packets; Protocol or part of protocol for error control
}
H04L 1/0084
. .
{
Formats for payload data
}
H04L 1/0085
. .
{
Formatting with cells
}
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. .
{
Unequal error protection( H04L 27/00 and H04L 1/004 take precedence for layer 1/2 aspects, e.g. bit loading )
}
H04L 1/0088
. . .
{
in control part
}
H04L 1/0089
. . .
{
in payload
}
. .
{
arrangements specific to transmitters
}
. .
{
arrangements specific to receivers, e.g. format detection( detection of data rate H04L 25/0262 ; detection of coding rate H04L 1/0046 )
}
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.
by diversity reception( in general H04B 7/02 )
. .
using frequency diversity
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H04L 1/06
. .
using space diversity
H04L 1/0606
. . .
{
Space-frequency coding
}
. . .
{
Space-time modulation
}
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. . .
{
Space-time coding
}
. . . .
{
Transmitter arrangements
}
. . . .
{
Receiver arrangements
}
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H04L 1/0637
. . . .
{
Properties of the code
}
. . . . .
{
block codes
}
. . . . .
{
by means of convolutional encoding
}
H04L 1/0656
. . . . .
{
Cyclotomic systems, e.g. Bell Labs Layered Space-Time (BLAST)
}
. . . . .
{
Limited orthogonality systems
}
H04L 1/0668
. . . . .
{
Orthogonal systems, e.g. using Alamouti codes
}
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. . . .
{
characterised by the signaling
}
H04L 1/0681
. . . . .
{
adapting space time parameters, i.e. modifying the space time matrix
}
H04L 1/0687
. . . . .
{
Full feedback
}
H04L 1/0693
. . . . .
{
Partial feedback, e.g. partial channel state information (CSI)
}
.
by repeating transmission, e.g. Verdan system
{
( H04L 1/1858 and H04L 1/189 take precedence )
}
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.
by using return channel
. .
in which the signals are sent back to the transmitter to be checked
{
echo systems
}
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. .
in which the return channel carries supervisory signals, e.g. repetition request signals
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H04L 1/1607
. . .
{
Details of the supervisory signal
}
H04L 1/1614
. . . .
{
using bitmaps
}
. . . .
{
Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
}
. . . .
{
List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers( H04L 1/1614 takes precedence )
}
H04L 1/1635
. . . .
{
Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages
}
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H04L 1/1642
. . . .
{
Formats specially adapted for sequence numbers
}
H04L 1/165
. . . . .
{
Variable formats
}
H04L 1/1657
. . . .
{
Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window
}
H04L 1/1664
. . . .
{
the supervisory signal being transmitted together with payload signals; piggybacking
}
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H04L 1/1671
. . . .
{
the supervisory signal being transmitted together with control information
}
H04L 1/1678
. . . . .
{
where the control information is for timing, e.g. time stamps
}
H04L 1/1685
. . . .
{
the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
}
H04L 1/1692
. . . .
{
Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts
}
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. . .
Automatic repetition systems, e.g. van Duuren system;
{
ARQ protocols
}
H04L 1/1803
. . . .
{
Stop-and-wait protocols
}
H04L 1/1806
. . . .
{
Go-back-N protocols
}
H04L 1/1809
. . . .
{
Selective-repeat protocols
}
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H04L 1/1812
. . . .
{
Hybrid protocols
}
H04L 1/1816
. . . . .
{
with retransmission of the same, encoded, message
}
H04L 1/1819
. . . . .
{
with retransmission of additional or different redundancy
}
H04L 1/1822
. . . .
{
involving configuration of ARQ with parallel processes
}
H04L 1/1825
. . . .
{
Adaptation of specific ARQ protocol parameters according to transmission conditions
}
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H04L 1/1829
. . . .
{
Arrangements specific to the receiver end
}
. . . . .
{
Details of sliding window management
}
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H04L 1/1835
. . . . .
{
Buffer management
}
. . . . . .
{
for semi-reliable protocols, e.g. for less sensitive applications such as streaming video( buffer level management for video bitstream receiver H04N 21/44004 )
}
H04L 1/1841
. . . . . .
{
Resequencing
}
H04L 1/1845
. . . . . .
{
Combining techniques, e.g. code combining
}
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H04L 1/1848
. . . . .
{
Time-out mechanisms
}
H04L 1/1851
. . . . . .
{
using multiple timers
}
H04L 1/1854
. . . . .
{
Scheduling and prioritising arrangements
}
. . . . .
{
Transmission or retransmission of more than one copy of acknowledgement message( repetition in general H04L 1/08 )
}
. . . . .
{
Physical mapping arrangements( for ACK signaling see also H04L 5/0053 )
}
. . . . .
{
ARQ related signaling( H04L 1/1607 takes precedence )
}
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H04L 1/1867
. . . .
{
Arrangements specific to the transmitter end
}
. . . . .
{
Details of sliding window management
}
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H04L 1/1874
. . . . .
{
Buffer management
}
. . . . . .
{
for semi-reliable protocols, e.g. for less sensitive applications like streaming video( buffer level management for video bitstream control arrangements H04N 21/44004 )
}
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H04L 1/188
. . . . .
{
Time-out mechanisms
}
H04L 1/1883
. . . . . .
{
using multiple timers
}
H04L 1/1887
. . . . .
{
Scheduling and prioritising arrangements
}
. . . . .
{
Transmission or retransmission of more than one copy of a message( repetition in general H04L 1/08 )
}
. . . . .
{
Physical mapping arrangements( physical resource mapping in general H04L5 )
}
H04L 1/1896
. . . . .
{
ARQ related signaling
}
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.
using signal quality detector
WARNING
-

see 95C20, G01R 29/02

. .
{
Frame classification, e.g. bad, good or erased( frame indication per se H04L 1/0082 )
}
H04L 1/203
. .
{
Details of error rate determination, e.g. BER, FER or WER
}
. .
{
jitter monitoring
}
H04L 1/206
. .
{
for modulated signals
}
H04L 1/208
. .
{
involving signal re-encoding
}
.
using redundant apparatus to increase reliability
{
see G06F 11/08 to G06F 11/20
}
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.
Testing correct operation
H04L 1/241
. .
{
using pseudo-errors
}
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H04L 1/242
. .
{
by comparing a transmitted test signal with a locally generated replica
}
. . .
{
at the transmitter, using a loop-back
}
H04L 1/244
. . .
{
test sequence generators
}
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H04L 1/245
. .
{
by using the properties of transmission codes
}
H04L 1/246
. . .
{
two-level transmission codes, e.g. binary
}
H04L 1/247
. . .
{
three-level transmission codes, e.g. ternary
}
H04L 1/248
. .
{
Distortion measuring systems( measurement of non-linear distortion G01R 23/20 ; measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time, duration G01R 29/02 )
}
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Arrangements affording multiple use of the transmission path( multiplex communication in general H04J;
{
orthogonal multiplex systems H04J 11/00
}
)
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.
{
Arrangements for dividing the transmission path( duplexing H04L 5/14 ; multiplexing of different sources on one path H04J )
}
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H04L 5/0003
. .
{
Two-dimensional division( time-code division H04J 11/00 , H04J 13/00 ; for time-space division H04B 7/0413 , H04B 7/0697 )
}
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H04L 5/0005
. . .
{
Time-frequency
}
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. . . .
{
the frequencies being orthogonal e.g. OFDM(A), DMT
}
H04L 5/0008
. . . . .
{
Wavelet-division
}
H04L 5/001
. . . . .
{
the frequencies being arranged in component carriers
}
H04L 5/0012
. . . . .
{
Hopping in multicarrier systems( for frequency hopping in spread spectrum systems H04B 1/713 )
}
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H04L 5/0014
. .
{
Three-dimensional division( time-code-space division H04B 7/0413 , H04B 7/0697 )
}
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H04L 5/0016
. . .
{
Time-frequency-code
}
. . . .
{
in which a distinct code is applied, as a temporal sequence, to each frequency
}
. . . .
{
in which one code is applied, as a temporal sequence, to all frequencies
}
. . . .
{
in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA
}
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. . .
{
Time-frequency-space
}
H04L 5/0025
. . . .
{
Spatial division following the spatial signature of the channel
}
H04L 5/0026
. .
{
Division using four or more dimensions
}
. .
{
Variable division( signaling therefor H04L 5/0092 )
}
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.
{
Arrangements for allocating sub-channels of the transmission path
}
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. .
{
Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
}
H04L 5/0033
. . .
{
each allocating device acting autonomously, i.e. without negotiation with other allocating devices
}
H04L 5/0035
. . .
{
Resource allocation in a cooperative multipoint environment
}
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. .
{
Inter-user or inter-terminal allocation
}
H04L 5/0039
. . .
{
Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
}
H04L 5/0041
. . .
{
Frequency-non-contiguous
}
. .
{
intra-user or intra-terminal allocation
}
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. .
{
allocation of payload
}
. . .
{
Determination of how many bits are transmitted on different sub-channels
}
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. .
{
Allocation of pilot signals, i.e. of signals known to the receiver
}
H04L 5/005
. . .
{
of common pilots, i.e. pilots destined for multiple users or terminals
}
H04L 5/0051
. . .
{
of dedicated pilots, i.e. pilots destined for a single user or terminal
}
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. .
{
Allocation of signaling, i.e. of overhead other than pilot signals
}
H04L 5/0055
. . .
{
Physical resource allocation for ACK/NACK( for physical mapping arrangements in ARQ protocols H04L 1/1861 )
}
H04L 5/0057
. . .
{
Physical resource allocation for CQI
}
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H04L 5/0058
. .
{
Allocation criteria
}
H04L 5/006
. . .
{
Quality of the received signal, e.g. BER, SNR, water filling
}
H04L 5/0062
. . .
{
Avoidance of ingress interference, e.g. ham radio channels
}
. . .
{
Rate requirement of the data, e.g. scalable bandwidth, data priority
}
H04L 5/0066
. . .
{
Requirements on out-of-channel emissions
}
H04L 5/0067
. . .
{
Allocation algorithms which involve graph matching
}
H04L 5/0069
. . .
{
Allocation based on distance or geographical location( allocation based on terminal or device properties in general, H04W72/04S2 )
}
H04L 5/0071
. . .
{
Allocation based on fairness other than the proportional kind
}
H04L 5/0073
. . .
{
Allocation arrangements that take into account other cell interferences( for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J 11/005 )
}
H04L 5/0075
. . .
{
Allocation using proportional fairness
}
H04L 5/0076
. . .
{
Allocation utility-based
}
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. .
{
Timing of allocation
}
H04L 5/008
. . .
{
once only, on installation
}
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H04L 5/0082
. . .
{
at predetermined intervals
}
H04L 5/0083
. . . .
{
symbol-by-symbol
}
H04L 5/0085
. . .
{
when channel conditions change
}
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H04L 5/0087
. . .
{
when data requirements change
}
H04L 5/0089
. . . .
{
due to addition or removal of users or terminals
}
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H04L 5/0091
.
{
Signaling for the administration of the divided path
}
. .
{
Indication of how the channel is divided
}
. .
{
Indication of how sub-channels of the path are allocated
}
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H04L 5/0096
. .
{
Indication of changes in allocation
}
H04L 5/0098
. . .
{
Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
}
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H04L 5/02
.
Channels characterised by the type of signal
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H04L 5/023
. .
{
Multiplexing of multicarrier modulation signals( multicarrier modulation H04L 27/2601 )
}
H04L 5/026
. . .
{
using code division
}
H04L 5/04
. .
the signals being represented by different amplitude or polarities, e.g. quadriplex
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. .
the signals being represented by different frequencies( combined with time-division multiplexing H04L 5/26 )
H04L 5/08
. . .
each combination of signals in different channels being represented by a fixed frequency
{
e.g. twinplex; see H04L 27/16
}
H04L 5/10
. . .
with dynamo-electric generation of carriers ; with mechanical filters or demodulators
H04L 5/12
. .
the signals being represented by different phase modulations of a single carrier
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.
Two-way operation using the same type of signal, i.e. duplex(
{
duplex repeaters H04L 25/22
}
; conditioning for two-way transmission in general H04B 3/20 ;
{
for interconnection between telephone switching centres H04Q 3/00
}
)
H04L 5/1407
. .
{
Artificial lines or their setting( for line transmission systems in general H04B 3/40 )
}
H04L 5/1415
. .
{
using control lines
}
H04L 5/1423
. .
{
for simultaneous baseband signals
}
. .
{
for modulated signals( H04L 5/1469 takes precedence )
}
Collapse
H04L 5/1438
. .
{
Negotiation of transmission parameters prior to communication( modified according to link quality H04L 1/0001 )
}
H04L 5/1446
. . .
{
of transmission speed
}
H04L 5/1453
. . .
{
of modulation type
}
H04L 5/1461
. .
{
Suppression of signals in the return path, i.e. bidirectional control circuits
}
Collapse
H04L 5/1469
. .
{
using time-sharing
}
H04L 5/1476
. . .
{
operating bitwise
}
Collapse
H04L 5/1484
. . .
{
operating bytewise
}
H04L 5/1492
. . . .
{
with time compression, e.g. operating according to the ping-pong technique
}
H04L 5/16
. .
Half-duplex systems ; Simplex-duplex switching ; Transmission of break signals
{
non automatically inverting the direction of transmission
}
H04L 5/18
. .
Automatic changing of the traffic direction
H04L 5/20
.
using different combinations of lines, e.g. phantom working
{
( phantom interconnection between telephone switching centres H04M 7/08 ; coupling arrangements therefor H04L 25/0272 )
}
Collapse
H04L 5/22
.
using time-division multiplexing
{
in general H04J 3/00
}
H04L 5/225
. .
{
combined with the use of transition coding( transition coding H04L 25/493 )
}
Collapse
H04L 5/24
. .
with start-stop synchronous converters
H04L 5/245
. . .
{
with a number of discharge tubes or semiconductor elements which successively connect the different channels to the transmission channels( see: H04L 13/00 to H04L 23/00 , H03K 5/15 , H03K 17/62 , H04J 3/047 )
}
H04L 5/26
. .
combined with the use of different frequencies
Collapse
Arrangements for synchronising receiver with transmitter
{
( synchronisation of electronic time-pieces G04G 7/00 ; synchronisation of generators of electric oscillations or pulses H03L ; synchronising in TV system H04N 5/04 ; regeneration of clock signals for television systems H04N 7/0352 )
}
.
{
Initialisation of the receiver( H04L 7/0075 and H04L 7/10 take precedence )
}
Collapse
.
{
Synchronisation information channels, e.g. clock distribution lines
}
. .
{
by comparing receiver clock with transmitter clock
}
Collapse
H04L 7/0016
.
{
correction of synchronization errors
}
Collapse
. .
{
correction by interpolation
}
. . .
{
interpolation of clock signal
}
. . .
{
interpolation of received data signal
}
Collapse
. .
{
Correction by delay
}
H04L 7/0037
. . .
{
Delay of clock signal
}
H04L 7/0041
. . .
{
Delay of data signal
}
H04L 7/0045
. .
{
Correction by a latch cascade
}
. .
{
Correction by an elastic buffer
}
Collapse
.
{
Detection of the synchronisation error by features other than the received signal transition( by means of signal transition H04L 7/033 )
}
. .
{
detection of error based on equalizer tap values
}
. .
{
detection of error based on data decision error, e.g. Mueller type detection
}
. .
{
detection of error based on transmission code rule
}
. .
{
detection of error based on maximum signal power, e.g. peak value, maximizing autocorrelation
}
.
{
with photonic or optical means
}
Collapse
H04L 7/0079
.
{
Receiver details
}
. .
{
taking measures against momentary loss of synchronisation, e.g. inhibiting the synchronisation, using idle words or using redundant clocks
}
. .
{
Preprocessing of received signal for synchronisation, e.g. by code conversion, pulse generation or edge detection
}
.
{
Transmitter details
}
H04L 7/0095
.
{
with mechanical means
}
Collapse
.
Speed or phase control by the received code signals, the signals containing no special synchronisation information
{
( H04L 7/0075 takes precedence; tuning or selecting resonant circuits H03J ; using the properties of error detecting or correcting codes H04L 7/048 )
}
Collapse
. .
extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit
H04L 7/0272
. . .
{
with squaring loop
}
H04L 7/0274
. . .
{
with Costas loop
}
H04L 7/0276
. . .
{
Self-sustaining, e.g. by tuned delay line and a feedback path to a logical gate
}
H04L 7/0278
. . .
{
Band edge detection
}
Collapse
. .
using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
. . .
{
with a digital phase-locked loop (PLL) processing binay samples, e.g. add/subtract logic for correction of receiver clock( H04L 7/0337 takes precedence )
}
. . .
{
with an integrator-detector
}
Collapse
. . .
{
Processing of samples having at least three levels, e.g. soft decisions
}
H04L 7/0335
. . . .
{
Gardner detector
}
Collapse
. . .
{
Selecting between two or more discretely delayed clocks or selecting between two or more discretely delayed received code signals
}
H04L 7/0338
. . . .
{
the correction of the phase error being performed by a feed forward loop
}
Collapse
.
Speed or phase control by synchronisation signals
{
( H04L 7/0075 takes precedence )
}
Collapse
. .
{
using special codes as synchronising signal
}
. . .
{
Detectors therefor, e.g. correlators, state machines( digital correlators in general G06F 17/15 )
}
. . .
{
Pseudo-noise (PN) codes variable during transmission( synchronisation of spread spectrum receivers H04B 1/69 )
}
. . .
{
using a single bit, e.g. start stop bit
}
. . .
{
using a dotting sequence
}
. .
{
using the properties of error detecting or error correcting codes, e.g. parity as synchronisation signal
}
Collapse
. .
the synchronisation signals differing from the information signals in amplitude, polarity, or frequency
{
or length
}
. . .
{
and superimposed by modulation
}
. .
the synchronisation signals recurring cyclically
. .
Arrangements for initial synchronisation
NOTE
-
In group H04L 9/00 to H04L 9/32 , in the absence of an indication to the contrary, an invention is classified in the last appropriate place.

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{
Cryptographic mechanisms or cryptographic
}
arrangements for secret or secure communication
{
( network architectures or network communication protocols for network security H04L 63/00 or for wireless network security H04W 12/00 ; security arrangements for protecting computers or computer systems against unauthorized activity G06F 21/00 )
}
NOTE
-
1. This group covers: 1.1 Cryptographic mechanisms including cryptographic protocols and cryptographic algorithms, whereby a cryptographic protocol is a distributed cryptographic algorithm defined by a sequence of steps precisely specifying the actions required of two or more entities to achieve specific security objectives (e.g. cryptographic protocol for key agreement), and whereby a cryptographic algorithm is specifying the steps followed by a single entity to achieve specific security objectives (e.g. cryptographic algorithm for symmetric key encryption). 1.2 H04L 9/00 focuses on cryptographic mechanisms such as encryption schemes, digital signatures, hash functions, random number generation, key management, said cryptographic mechanisms providing information security such as privacy or confidentiality, data integrity, message authentication, entity authentication, authorization, validation, certification, time-stamping, anonymity, revocation, non-repudiation. 1.3 H04L 9/00 covers also countermeasures against attacks on cryptographic mechanisms. 2. This group does not cover: 2.1 Networking architectures or network communication protocols for securing the traffic flowing through data packet networks and providing secure exchanges among applications communicating through data packet networks, which are covered by H04L 63/00 . Attention is drawn to the Note 1. after group H04L 63/00 2.2 Security arrangements for protecting computers or computer systems against unauthorised activity, which are covered by G06F21/00N

H04L 9/001
.
{
using chaotic signals
}
Collapse
.
{
Countermeasures against attacks on cryptographic mechanisms( network architectures or network communication protocols for protection against malicious traffic H04L 63/1441 )
}
H04L 9/003
. .
{
for power analysis, e.g. differential power analysis [DPA] or simple power analysis [SPA]
}
H04L 9/004
. .
{
for fault attacks
}
H04L 9/005
. .
{
for timing attacks
}
Collapse
.
{
involving public key infrastructure [PKI] trust models( network architecture or network communication protocol for supporting authentication of entities using certificates in a packet data network H04L 63/0823 )
}
H04L 9/007
. .
{
involving hierarchical structures
}
.
{
involving homomorphic encryption
}
Collapse
.
the encryption apparatus using shift registers or memories for block-wise
{
or stream
}
coding, e.g. DES systems
{
or RC4; Hash functions; Pseudorandom sequence generators
}
H04L 9/0606
. .
{
including means for manipulating block length( H04L 9/0687 takes precedence )
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0618

H04L 9/0612
. .
{
Countermeasures against differential power analysis
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/003

Collapse
. .
{
Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
}
. . .
{
with splitting of the data block into left and right halves, e.g. Feistel based algorithms, DES, FEAL, IDEA or KASUMI
}
. . .
{
Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
}
. . .
{
Modes of operation, e.g. cipher block chaining [CBC], electronic codebook [ECB] or Galois/counter mode [GCM]
}
. .
{
Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
}
Collapse
. .
{
Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
}
Collapse
. . .
{
Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
}
Collapse
. . . .
{
with particular pseudorandom sequence generator
}
. . . . .
{
producing a non-linear pseudorandom sequence
}
Collapse
H04L 9/0675
. .
{
including means for processing multiple rounds
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0618

H04L 9/0681
. . .
{
specifically for Rijndael
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0631

H04L 9/0687
. . .
{
with splitting of the data block into left and right halves, e.g. Feistel structures
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0625

H04L 9/0693
. .
{
including variable substitution, permutation, order or number of rounds, controlled by a key and/or the input data
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0618

Collapse
.
Key distribution
{
or management, e.g. generation, sharing or updating, of cryptographic keys or passwords( network architectures or network communication protocols for supporting key management in a packet data network H04L 63/06 )
}
WARNING
-
The former subgroup H04L 9/08 was a 2-dot subgroup placed under H04L 9/06 . However since the former subgroup H04L 9/08 comprises both symmetric and asymmetric key distribution the subgroup H04L 9/08 was promoted to one-dot-level, unlike the corresponding IPC subgroup

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H04L 9/0802
. .
{
using a key distribution center, a trusted party or a key server
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0816

H04L 9/0805
. . .
{
involving a conference key or a group key
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0816

H04L 9/0808
. .
{
using a control vector
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/088

Collapse
H04L 9/0811
. .
{
using Diffie-Hellman key agreement
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0838

H04L 9/0813
. . .
{
with user authentication or key authentication
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0838

Collapse
. .
{
Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
}
Collapse
. . .
{
Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)( network architectures or network communication protocols for key distribution in a packet data network H04L 63/062 )
}
. . . .
{
using key encryption key
}
. . . .
{
using asymmetric-key encryption or public key infrastructure [PKI
}
, e.g. key signature or public key certificates]
. . . .
[N: involving distinctive intermediate devices or communication paths( network architectures or network communication protocols using different networks H04L 63/18 )
Collapse
. . . .
{
involving central third party, e.g. key distribution center [KDC
}
or trusted third party [TTP]
Collapse
. . . . .
{
involving conference or group key( network architectures or network communication protocols for key management in group communication in a packet data network H04L 63/065 )
}
. . . . . .
{
using tree structure or hierarchical structure
}
Collapse
. . .
{
Key agreement, i.e. key establishment technique in which a shared key is derived by parties as a function of information contributed by, or associated with, each of these( network architectures or network communication protocols for key exchange in a packet data network H04L 63/061 )
}
Collapse
. . . .
{
involving Diffie-Hellman or related key agreement protocols
}
. . . . .
{
with user authentication or key authentication, e.g. ElGamal, MTI, MQV-Menezes-Qu-Vanstone protocol or Diffie-Hellman protocols using implicitly-certified keys
}
. . . .
{
involving identity based encryption [IBE] schemes
}
. . .
{
Secret sharing or secret splitting, e.g. threshold schemes
}
Collapse
. . .
{
Quantum cryptography( transmission systems employing electromagnetic waves other than radio waves, e.g. light, infra-red H04B10; wavelength-division multiplex systems H04J 14/02 )
}
"
. . . .
{
involving additional nodes, e.g. quantum relays, repeaters, intermediate nodes or remote nodes
}
. . . .
{
Details about key distillation or coding, e.g. reconciliation, error correction, privacy amplification, polarisation coding or phase coding
}
Collapse
. .
{
Generation of secret information including derivation or calculation of cryptographic keys or passwords
}
. . .
{
involving passwords or one-time passwords( network architectures or network communication protocols for using one-time keys in a packet data network H04L 63/067 )
}
. . .
{
involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics
}
. . .
{
involving random numbers or seeds
}
. . .
{
using geo-location information, e.g. location data, time, relative position or proximity to other entities
}
. . .
{
based on channel impulse response [CIR]
}
. . .
{
using additional device, e.g. trusted platform module [TPM], smartcard, USB or hardware security module [HSM]
}
. .
{
Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms( network architectures or network communication protocols for using time-dependent keys in a packet data network H04L 63/068 )
}
H04L 9/0883
. .
{
using quantum cryptography
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0852

H04L 9/0886
. .
{
using key recovery or key escrow
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/0894

H04L 9/0888
. .
{
using secret sharing
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/085

. .
{
Revocation or update of secret information, e.g. encryption key update or rekeying
}
Collapse
. .
{
Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
}
. . .
{
involving additional devices, e.g. trusted platform module [TPM], smartcard or USB
}
H04L 9/10
.
with particular housing, physical features or manual controls
{
( not used; see H04L 9/00 )
}
H04L 9/12
.
Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
Collapse
.
using a plurality of keys or algorithms
{
( network architectures or network communication protocols wherein the sending and receiving network entities apply hybrid encryption, i.e. combination of symmetric and asymmetric encryption H04L 63/045 )
}
. .
the keys or algorithms being changed during operation
Collapse
H04L 9/18
.
Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/065

Collapse
H04L 9/20
. .
Pseudorandom key sequence combined element-for-element with data sequence
{
not used; see H04L 9/18
}
Collapse
H04L 9/22
. . .
with particular pseudorandom sequence generator
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/065

H04L 9/24
. . . .
sequence produced by more than one generator
{
( not used; see H04L 9/22 )
}
H04L 9/26
. . . .
producing a non-linear pseudorandom sequence
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/065

H04L 9/28
.
using particular encryption algorithm
Collapse
.
Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
WARNING
-
the former H04L 9/30 was a 2-dot subgroup under H04L 9/28 ; however since the subgroup H04L 9/28 is not used the subgroup H04L 9/30 need to be promoted to one-dot-level

Collapse
. .
{
underlying computational problems or public-key parameters
}
. . .
{
involving the discrete logarithm problem, e.g. ElGamal or Diffie-Hellman systems
}
. . .
{
involving the integer factorization problem, e.g. RSA or quadratic sieve [QS] schemes
}
. . .
{
details relating to polynomials generation, e.g. generation of irreducible polynomials
}
. . .
{
details relating to pseudo-prime or prime number generation, e.g. primality test
}
. .
{
based on error correction codes, e.g. McEliece
}
H04L 9/3046
. .
{
based on factoring a large integer, e.g. Rivest-Shamir-Adleman [RSA]
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/302

H04L 9/3053
. .
{
based on a modular knapsack
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/30 +

H04L 9/306
. .
{
based on discrete logarithm, e.g. ElGamal
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3013 and/or H04L 9/3066

Collapse
. .
{
involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
}
. . .
{
involving pairings, e.g. identity based encryption [IBE], bilinear mappings or bilinear pairings, e.g. Weil or Tate pairing
}
H04L 9/308
. .
{
based on polynomial equations
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3093

H04L 9/3086
. .
{
based on probabilistic schemes
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/30

. .
{
involving Lattices or polynomial equations, e.g. NTRU scheme
}
Collapse
.
including means for verifying the identity or authority of a user of the system
{
or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
}
(
{
network architectures or network communication protocols for supporting entities authentication in a packet data network H04L 63/08 ; applying verification of the received information H04L 63/12 ;
}
computer systems G06F; coin-freed or like apparatus with coded identity card or credit card G07F 7/08 )
H04L 9/3202
. .
{
involving a third party or a trusted authority
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/321

H04L 9/3205
. .
{
using a non-public key algorithm
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/32

H04L 9/3207
. .
{
using zero-knowledge proof
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3218

Collapse
. .
{
involving a third party or a trusted authority
}
. . .
{
using tickets or tokens, e.g. Kerberos( network architectures or network communication protocols for entities authentication using tickets in a packet data network H04L 63/0807 )
}
. .
{
using a plurality of channels( network architectures or network communication protocols using different networks H04L 63/18 )
}
Collapse
. .
{
using proof of knowledge, e.g. Fiat-Shamir, GQ, Schnorr, ornon-interactive zero-knowledge proofs
}
. . .
{
interactive zero-knowledge proofs
}
H04L 9/3223
. .
{
using hash functions
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3236 + and/or H04L 9/0643

Collapse
. .
{
using a predetermined code, e.g. password, passphrase or PIN( network architectures or network communication protocols for supporting authentication of entities using passwords in a packet data network H04L 63/083 )
}
. . .
{
One-time or temporary data, i.e. information which is sent for every authentication or authorization, e.g. one-time-password, one-time-token or one-time-key
}
. . .
{
Biological data, e.g. fingerprint, voice or retina( network architectures or network communication protocols for supporting authentication of entities using biometrical features in a packet data network H04L 63/0861 )
}
. .
{
involving additional secure or trusted devices, e.g. TPM, smartcard, USB or software token( network architectures or network communication protocols for supporting authentication of entities using an additional device in a packet data network H04L 63/0853 )
}
Collapse
. .
{
using cryptographic hash functions
}
. . .
{
involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD
}
. . .
{
involving keyed hash functions, e.g. message authentication codes [MACs], CBC-MAC or HMAC
}
H04L 9/3244
. .
{
for message authentication( H04L 9/3281 takes precedence )
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/32

Collapse
. .
{
involving digital signatures
}
. . .
{
using RSA or related signature schemes, e.g. Rabin scheme
}
. . .
{
using DSA or related signature schemes, e.g. elliptic based signatures, ElGamal or Schnorr schemes
}
. . .
{
using group based signatures, e.g. ring or threshold signatures
}
. . .
{
using blind signatures
}
H04L 9/326
. .
{
involving the concurrent use of a plurality of channels of different nature
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3215

Collapse
. .
{
involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements( network architectures or network communication protocols for supporting authentication of entities using certificates in a packet data network H04L 63/0823 )
}
. . .
{
using certificate chains, trees or paths; Hierarchical trust model
}
. . .
{
using certificate validation, registration, distribution or revocation, e.g. certificate revocation list [CRL]
}
Collapse
. .
{
using challenge-response
}
. . .
{
for mutual authentication( network architectures or network communication protocols for achieving mutual authentication in a packet data network H04L 63/0869 )
}
H04L 9/3276
. . .
{
involving splitting up or repeating the challenge and/or response
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3271

. . .
{
using physically unclonable functions [PUF]
}
Collapse
H04L 9/3281
. .
{
using electronic signatures
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3247

H04L 9/3284
. . .
{
using blind signatures
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3257

H04L 9/3286
. . .
{
involving a plurality or a group of signers
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3255

Collapse
H04L 9/3289
. . .
{
with message recovery
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3247

H04L 9/3292
. . . .
{
with partial message recovery
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3247

H04L 9/3294
. .
{
using time stamps or public key certificates
}
WARNING
-
This subgroup is no longer used for the classification of new documents as from 1.02.2012 and the backlog of this subgroup is being continuously reclassified to H04L 9/3263 + or H04L 9/3297

. .
{
involving time stamps, e.g. generation of time stamps
}
.
Bits, or blocks of bits, of the telegraphic message being interchanged in time
{
( for speech signals H04K 1/06 )
}
.
with means for detecting characters not meant for transmission
.
Encryption being effected by mechanical apparatus, e.g. rotating cams, switches, keytape punchers
Collapse
Data switching networks( interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units G06F 13/00 )
Collapse
H04L 12/02
.
Details
H04L 12/04
. .
Switchboards
H04L 12/06
. .
Answer-back mechanisms or circuits
H04L 12/08
. .
Alloting numbers to messages ; Counting characters, words or messages
. .
Current supply arrangements
. .
Arrangements for remote connection or disconnection of substations or of equipment thereof
Collapse
. .
{
Metering,
}
charging
{
or billing
}
arrangements
{
specially adapted for data wireline or wireless communications( payment schemes, architectures or protocols per se G06Q20 )
}
Collapse
. . .
{
Architecture for metering, charging or billing
}
. . . .
{
Policy-and-charging control [PCC] architecture
}
Collapse
H04L 12/141
. . .
{
Indication of costs
}
Collapse
. . . .
{
in real-time
}
. . . . .
{
Advice of charge with threshold, e.g. user indicating maximum cost
}
. . . .
{
Indication of expected costs
}
. . .
{
involving dedicated fields in the data packet for billing purposes
}
. . .
{
Invoice generation, e.g. customization, lay-out, database processing, algorithms for calculating the bill or formatting invoices as WWW pages( invoicing in general G06Q 30/04 )
}
Collapse
. . .
{
Metric aspects
}
. . . .
{
volume-based
}
. . . .
{
time-based
}
Collapse
H04L 12/1442
. . .
{
at network operator level
}
. . . .
{
inter-operator billing
}
. . . .
{
trading network capacity or selecting route based on tariff
}
Collapse
. . .
{
Methods or systems for payment or settlement of the charges for data transmission involving significant interaction with the data transmission network
}
H04L 12/1457
. . . .
{
using an account
}
. . . .
{
using digital cash
}
H04L 12/1464
. . . .
{
using a card, such as credit card, prepay card or SIM
}
. . . .
{
involving prepayment
}
Collapse
H04L 12/1471
. . . .
{
splitting of costs
}
. . . . .
{
the splitting involving a third party
}
. . . . .
{
the splitting involving only the communication parties
}
. . . .
{
involving use of telephony infrastructure for billing for the transport of data, e.g. call detail record [CDR] or intelligent network infrastructure
}
Collapse
. . .
{
Tariff-related aspects
}
. . . .
{
dependent on congestion
}
. . . .
{
negotiation of tariff
}
. . . .
{
involving discounts
}
Collapse
H04L 12/16
. .
Arrangements for providing special services to substations
{
contains provisionally no documents
}
Collapse
. . .
for broadcast or conference
{
, e.g. multicast( multicast or broadcast switches H04L12/56S3A )
}
H04L 12/1804
. . . .
{
for stock exchange and similar applications
}
H04L 12/1809
. . . .
{
for auctioneering devices
}
Collapse
H04L 12/1813
. . . .
{
for computer conferences, e.g. chat rooms( protocols for multimedia communication H04L 29/06027 ; signaling and real-time protocols for multimedia conference H04L 29/06414 ; instant messaging H04L 12/581 ; telephonic conference arrangements H04M 3/56 ; television conference systems H04N 7/15 )
}
H04L 12/1818
. . . . .
{
Conference organisation arrangements, e.g. handling schedules, setting up parameters needed by nodes to attend a conference, booking network resources, notifying involved parties
}
H04L 12/1822
. . . . .
{
Conducting the conference, e.g. admission, detection, selection or grouping of participants, correlating users to one or more conference sessions, prioritising transmission
}
H04L 12/1827
. . . . .
{
Network arrangements for conference optimisation or adaptation
}
H04L 12/1831
. . . . .
{
Tracking arrangements for later retrieval, e.g. recording contents, participants activities or behavior, network status
}
Collapse
H04L 12/1836
. . . .
{
with heterogeneous network architecture
}
H04L 12/184
. . . . .
{
with heterogeneous receivers, e.g. layered multicast
}
H04L 12/1845
. . . .
{
broadcast or multicast in a specific location, e.g. geocast( protocols for adapting network applications to user terminal location H04L 29/08657 ; services specially adapted for wireless communication networks making use of the location of users or terminals H04W 4/02 )
}
H04L 12/185
. . . .
{
with management of multicast group membership
}
H04L 12/1854
. . . .
{
with non-centralised forwarding system, e.g. chaincast
}
H04L 12/1859
. . . .
{
adapted to provide push services, e.g. data channels
}
Collapse
H04L 12/1863
. . . .
{
comprising mechanisms for improved reliability, e.g. status reports( arrangements for detecting or preventing errors by carrying supervisory signal the return channel H04L 1/16 )
}
Collapse
H04L 12/1868
. . . . .
{
Measures taken after transmission, e.g. acknowledgments
}
H04L 12/1872
. . . . . .
{
avoiding ACK or NACK implosion
}
H04L 12/1877
. . . . .
{
Measures taken prior to transmission
}
H04L 12/1881
. . . .
{
with schedule organisation, e.g. priority, sequence management
}
H04L 12/1886
. . . .
{
with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
}
H04L 12/189
. . . .
{
in combination with wireless systems( selective distribution or broadcast in wireless communication networks H04W 4/06 )
}
H04L 12/1895
. . . .
{
for short real-time information, e.g. alarms, notifications, alerts, updates
}
. .
Arrangements for preventing the taking of data from a data transmission channel without authorisation( means for verifying the identity or the authority of a user of a secure or secret communication system H04L 9/32 )
Collapse
. .
Arrangements for maintenance or administration
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/00

Collapse
. . .
{
involving integration or standardization
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/02

. . . .
{
using standardized network management architectures, e.g. TMN [Telecommunication Management network
}
, UNMA [Unified Network Management Architecture]
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0206

. . . .
{
using standardized network management protocols, e.g. SNMP [Simple Network Management Protocol
}
, CMIP [Common Management Interface Protocol]
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0213

. . . .
{
Multivendor or multistandard integration
}
WARNING
-
WARNING: This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/02 C]

. . . .
{
Mapping or translation of multiple network management protocols
}
WARNING
-
WARNING: This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0226

. . . .
{
using object oriented techniques, e.g. CORBA [Common Object Request Broker Architecture for representation of network management data
}
WARNING
-
WARNING: This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0233

. . . .
{
using relational databases for representation of network management data, e.g. managing via SQL [Structured Query Language
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/024

. . . .
{
using Internet technology, e.g. a standard Web Browser at the management workstation
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0246

Collapse
. . .
{
Architectural aspects of network management arrangements
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/04

. . . .
{
Arrangements involving multiple distributed management centers cooperatively managing the network
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/042

. . . .
{
Arrangements involving a hierarchical management structure
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/044

. . . .
{
Aspects of network management Agents
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/046

. . . .
{
Arrangements involving CNM [Customer Network Management
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/18

Collapse
. . .
{
involving network analysis
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/14

. . . .
{
using statistical methods, e.g. distribution tests, or establishing statistical profiles, or calculating probabilities
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/14

. . . .
{
for automatically determining the actual topology of a network( Topology discovery in routers H04L12/56C1 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/12

H04L 12/2417
. . . .
{
Service management, i.e. managing value added network services and related parameters, e.g. SLA [Service Level Agreements
}
, responsetimes, performance, throughput]
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/00

H04L 12/2418
. . . .
{
involving monitoring of all traffic over a specific network link
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 43/00

Collapse
. . .
{
involving management of faults or events or alarms
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/06

. . . .
{
Alarm or event filtering, e.g. for reduction of information
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0604

. . . .
{
Alarm and event correlation
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0631

. . . .
{
Automatic restoration of network faults
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0654

. . . .
{
involving Artificial Intelligence algorithms, e.g. expert systems, rule based systems, genetic algorithms
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/16

Collapse
. . .
{
Configuration management of network or network elements( management of devices network applications for proprietary or special purpose network environments H04L 29/08567 ; automatic configuration in wireless networks H04W 24/02 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/08

Collapse
H04L 12/2425
. . . .
Configuration setting of network or network elements]
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0803

Collapse
H04L 12/2426
. . . . .
{
for initial configuration or provisioning
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0806

H04L 12/2427
. . . . . .
{
Plug-and-play configuration
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0809

Collapse
H04L 12/2428
. . . . .
{
Changing of configuration
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0813

H04L 12/2429
. . . . . .
{
due to adaptation, e.g. in response to network events
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0816

H04L 12/243
. . . . . .
{
due to updating or upgrading of network functionality, e.g. firmware( topology update or discovery for routing purposes H04L12/56C1 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/085

Collapse
H04L 12/2431
. . . . . .
{
Configuration optimization
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0823

H04L 12/2432
. . . . . . .
{
for network cost reduction
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0826

H04L 12/2433
. . . . . . .
{
for network speed increase
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/083

H04L 12/2434
. . . . . . .
{
to reduce network energy consumption
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0833

H04L 12/2435
. . . . . . .
{
to enhance reliability, e.g. reduce downtime
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0836

Collapse
H04L 12/2436
. . . . .
{
Configuration by copying
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/084

H04L 12/2437
. . . . . .
{
based on generic templates
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0843

H04L 12/2438
. . . . . .
{
based on copy from other elements
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0846

. . . .
{
Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities, e.g. bandwidth on demand
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0896

. . . .
{
Assignment of logical groupings to network elements; Policy based network management or configuration
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0893

Collapse
H04L 12/2441
. . . .
{
Keeping track of network configuration
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/085

H04L 12/2442
. . . . .
{
by actively collecting or retrieving configuration information
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0853

H04L 12/2443
. . . . .
{
by archiving or backing up configuration information
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/0856

H04L 12/2444
. . . . .
{
by keeping history of different configuration generations or versions
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0859

H04L 12/2445
. . . . .
{
by rolling back to previous configuration versions
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0863

Collapse
H04L 12/2446
. . . .
{
Checking configuration
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0866

H04L 12/2447
. . . . .
{
by validating configuration within one network element
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0869

H04L 12/2448
. . . . .
{
by checking configuration conflicts with other network elements
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0873

Collapse
H04L 12/2449
. . . .
{
Aspects of the degree of configuration automation
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0876

H04L 12/2451
. . . . .
{
Manual configuration through operator
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0879

H04L 12/2452
. . . . .
{
Semiautomatic configuration, e.g. proposals from system
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0883

H04L 12/2453
. . . . .
{
Fully automatic configuration
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0886

H04L 12/2454
. . . .
{
Techniques to speed-up the configuration process
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/0889

Collapse
. . .
{
Hardware and software tools for network management
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/14 , H04L 41/20 , H04L 41/22 , H04L 41/24 , H04L 41/26

. . . .
{
for network design, e.g. with integrated simulation and design testing
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/14

. . . .
{
Network management software packages
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/20

H04L 12/2458
. . . .
{
using GUI [Graphical User Interface
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/22

. . . .
{
using dedicated network management hardware
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/24

. . . .
{
using dedicated tools for LAN [Local Area Network
}
management]
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/26

. . .
{
Security in network management, e.g. restricting network management access( protocols or architecture for network security H04L 29/06551 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/28

. . .
{
Decision processes by autonomous network management units using voting and bidding
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/30

. . .
{
Specific management aspects for broadband networks
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/32

Collapse
. . .
{
Network service management, ensuring proper service fulfilment according to an agreement or contract between two parties, e.g. between an IT-provider and a customer
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/50

Collapse
. . . .
{
Managing SLA [Service Level Agreement
}
or interaction between SLA and QoS [Quality of Service]]
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5003

. . . . .
{
Defining or negotiating SLA contracts, guarantees or penalties( SLA negotiation in wireless networks H04W 28/24 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/5006

Collapse
. . . . .
{
Measuring SLA quality parameters, e.g. against possible contract or guarantee violations( Monitoring performance metrics on a simple network level H04L 12/2634 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/5009

Collapse
H04L 12/2468
. . . . . .
{
determining service availability
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5012

H04L 12/2469
. . . . . . .
{
based on actual status of service availability, e.g. which services are available at this point in time
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5012

H04L 12/247
. . . . . . .
{
based statistics of service availability, e.g. in percentage or over a given time
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/5016

. . . . . .
{
determining service performance, i.e. performance on service level, e.g. response time or MTBF [Mean Time Between Failure
}
]
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/5009

Collapse
. . . . .
{
Ensuring SLA( flow or congestion control at network level H04L 12/569 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 41/50 B

H04L 12/2473
. . . . . .
{
by giving priorities, e.g. assigning classes of service
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5022

. . . . . .
{
by proactively reacting to service quality change( e.g. degradation or upgrade )by reconfiguration( mere restoration of network faults H04L 12/2422 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5025

. . . . .
{
Service quality level based billing, e.g. dependent on measured service level customer is charged more or less( general charging or billing for transport of data packets H04L 12/14 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5029

. . . . .
{
Generating service level reports
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/50 D

. . . . .
{
Measuring contribution of individual network components to actual service level( alarm or event correlation H04L 12/2421 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5035

. . . . .
{
Testing of service level quality
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5038

Collapse
H04L 12/2479
. . . .
{
Service implementation
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5041

Collapse
H04L 12/248
. . . . .
{
Making service definitions prior to deployment
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5045

H04L 12/2481
. . . . . .
{
Automatic or semi-automatic definitions, e.g. definition templates
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5048

H04L 12/2482
. . . . . .
{
Service on demand, i.e. services are defined and provided in real time as requested by the user
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5051

. . . . .
{
Automatic provisioning of the service triggered by the service manager, e.g. concrete service implementation by automatic configuration of network components( for initializing configuration, i.e. provisioning of network or devices H04L 12/2425 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5054

. . . .
{
Service discovery by the Service Manager( automatically determining the actual topology of a network H04L 12/2416 ; topology discovery in routers H04L12/56C1 ; arrangements for service discovery, e.g. Service Location Protocol ( SLP )H04L 29/08648 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5058

Collapse
. . . .
{
Customer care
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/50 J

. . . . .
{
Customer Relationship Management( for arrangements involving Customer Network Management, i.e. giving the customer access to network management functions H04L 12/2413 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5064

. . . . .
{
Customer-centric QoS [Quality of Service
}
measurement]
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5067

. . . . .
{
Filtering out customers affected by service problems
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/507

. . . . .
{
Handling of Trouble Tickets
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5074

. . . .
{
Managing simple transport services, i.e. providing only network infrastructure
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5077

Collapse
. . . .
{
based on type of value added network service under agreement
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/508

. . . . .
{
wherein the managed service relates to web hosting( web hosting as such H04L 29/0809 , web-browsers G06F 17/30861 , video-hosting H04N 21/2743 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5083

. . . . .
{
wherein the managed service relates to voice services( protocols for real-time multimedia communications H04L 29/06176 ; management of telephonic communication services H04M 3/22 ; management of VoIP services H04M 7/0081 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5087

. . . . .
{
wherein the managed service relates to audio / video / TV( protocols for real-time multimedia communications H04L 29/06176 ; interactive television or VoD H04N21 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/509

. . . . .
{
wherein the managed service relates to messaging( messaging, such as e-mail in packet-switching networks H04L 12/58 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5093

. . . . .
{
wherein the managed service relates to chat services( conducting a computer conference H04L 12/1822 ; instant messaging H04L 12/581 )
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5093

H04L 12/2497
. . . . .
{
wherein the managed service relates to access to distributed or central networked applications
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/5096

H04L 12/2498
. . . . .
{
wherein the managed service relates to media content delivery over network
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 41/509

Collapse
. .
Monitoring arrangements ; Testing arrangements
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 43/00

Collapse
. . .
{
Monitoring arrangements
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to subgroups of H04L 43/00

Collapse
. . . .
{
involving a reduction of monitoring data
}
Collapse
. . . . .
{
using sampling of monitoring data, i.e. storing only a selection of packets
}
. . . . . .
{
using adaptive sampling
}
. . . . .
{
using flow Flow generation
}
. . . . .
{
using filtering( alarm or event filtering H04L 12/242 )
}
Collapse
. . . .
{
processing of captured monitoring data
}
. . . . .
{
for graphical visualization of monitoring data( graphical user interfaces H04L 12/2458 )
}
Collapse
H04L 12/2623
. . . . .
{
Report generation
}
. . . . . .
{
for traffic related reporting
}
. . . . . .
{
for device related reporting( reporting of sensed information of home appliances H04L 12/2803 )
}
. . . . . .
{
for time frame related reporting
}
Collapse
. . . .
{
Monitoring using or based on specific metrics
}
Collapse
H04L 12/2636
. . . . .
{
based on availability
}
. . . . . .
{
based on connectivity
}
. . . . . .
{
based on functioning( monitoring the activity of the application user H04L 29/08675 ; monitoring appliance functionality of home appliances H04L 12/2803 )
}
Collapse
. . . . .
{
using errors( management of events, faults or alarms H04L 12/2419 )
}
Collapse
. . . . . .
{
using packet loss
}
H04L 12/2649
. . . . . . .
{
using one way packet loss
}
H04L 12/2652
. . . . . . .
{
using round trip packet loss
}
. . . . . .
{
based on transmission error
}
Collapse
. . . . .
{
based on delays
}
H04L 12/266
. . . . . .
{
based on one way delays
}
H04L 12/2663
. . . . . .
{
based on round trip delays
}
H04L 12/2665
. . . . . .
{
based on Jitter
}
Collapse
H04L 12/2668
. . . . .
{
based on network utilization
}
. . . . . .
{
based on utilization of link capacity
}
. . . . . .
{
based on throughput
}
. . . . . .
{
based on packet rate
}
Collapse
H04L 12/2678
. . . .
{
using active monitoring, e.g. heartbeat protocols, polling, ping, trace-route
}
H04L 12/2681
. . . . .
{
with adaptive polling, i.e. dynamically adapting the polling rate
}
H04L 12/2684
. . . . .
{
by adding timestamps to packets
}
H04L 12/2686
. . . .
{
using dedicated network monitoring probes
}
H04L 12/2689
. . . .
{
using software, i.e. software packages
}
. . . .
{
using threshold monitoring
}
. . . .
{
using protocol analyzers
}
. . .
{
Testing equipment; Routine testing
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 43/50

Collapse
.
characterised by path configuration, e.g. local area networks (LAN), wide area networks (WAN)
. .
{
Broadband local area networks
}
Collapse
. .
{
Home automation networks
}
. . .
{
Home Audio Video Interoperability (HAVI) networks
}
Collapse
. . .
{
Exchanging configuration information on appliance services in a home automation network( adress allocation H04L 29/12207 ; arrangements for maintenance or administration involving network analysis for automatically determining the actual topology of a network H04L 12/2416 ; hardware or software tools for network management using graphical user interfaces H04L 12/2458 )
}
. . . .
{
indicating that an appliance service is present in a home automation network( monitoring functionality H04L 12/2642 ; arrangements for service discovery H04L 29/08648 )
}
. . . .
{
indicating a format for calling an appliance service function in a home automation network( protocols for network applications involving the use of web-based technology H04L 29/08099 )
}
. . . .
{
describing content present in a home automation network, e.g. audio video content( retrieval from the Internet G06F 17/30 W )
}
. . . .
{
Exchanging control software or macros for controlling appliance services in a home automation network( arrangements for maintenance or administration involving configuration of the network and network elements H04L 12/24 E )
}
Collapse
. . .
{
Controlling appliance services of a home automation network by calling their functionalities( arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station; in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom H04Q 9/00 )
}
. . . .
{
from a device located outside both the home and the home network( access arrangements H04L 12/2856 ; protocols for network applications involving the use of web-based technology for remote control or remote monitoring H04L 29/08099 ; telephonic communication systems adapted for combination with remote control systems H04M 11/00 B; arrangements for transmitting signals characterised by the use of a wireless eletrical link G08C 17/00 )
}
. . . .
{
based on user interaction within the home( receiver circuitry for displaying additional information being controlled by a remote control apparatus H04N 5/445 R )
}
. . . .
{
Avoiding conflicts related to the use of home appliances( arrangements for network security H04L 29/06 S )
}
Collapse
. . .
{
Reporting information sensed by appliance or service execution status of appliance services in a home automation network( device-related reporting H04L1/26M2B2 ; arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom H04Q 9/00 )
}
. . . .
{
Reporting to a device located outside the home and the home network( access arrangements H04L 12/2856 ; protocols for network applications involving the use of web-based technology for remote control or remote monitoring H04L 29/08099 ; telephonic communication systems adapted for combination with telemetering systems H04M 11/00 A )
}
Collapse
. . . .
{
Reporting to a device within the home network; wherein the reception of the information reported automatically triggers the execution of a home appliance functionality
}
. . . . .
{
involving user profiles according to which the execution of a home appliance functionality is automatically triggered
}
Collapse
. . .
{
Processing of data at an internetworking point of a home automation network
}
. . . .
{
Interconnection of the control functionalities between home networks( single bridge functionality H04L 12/4625 )
}
. . . .
{
Switching of information between an external network and a home network( access arrangements H04L 12/2856 )
}
. . . .
{
Protocol conversion between an external network and a home network( protocol conversion H04L 29/06 E; adaptation of digital video signals for transport over a specific home network H04N7/24T6 ; controlling appliance services of a home automation network from a device located outside the home and the home network H04L 12/2818 )
}
. . .
{
Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths( adaptations of television systems for transmission by electric cable for domestic distribution H04N 7/10 H; hybrid transport H04L 12/64 B; home network arrangements specially adapted for distribution of digital video signals H04N 7/24 N )
}
. .
{
Metropolitan area networks
}
Collapse
. .
{
Wide area networks, e.g. public data networks
}
Collapse
. . .
{
Access arrangements, e.g. Internet access( asynchronous transfer mode networks H04L 12/5601 ; broadband local area networks H04L 12/2801 ; optical access or distribution networks H04Q 11/0067 ; access to open networks H04L 12/5691 ; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M 11/00 ; home network gateways H04L 12/2834 ; wireless access networks H04W )
}
NOTE
-
(1) This group covers:
- access to a public data network, such as an IP network, for subscribers, i.e. customers of a network service provider, over a wired network.
- communication of generic types of data between end-user equipments, located typically at the subscriber premises, and an access server, which acts as interface between the access network and the public data network.
(2) This group does not cover:
- wireless access networks, which are covered by H04W
- optical distribution networks, which are covered by H04Q 11/0067
- bit-level, or PHY layer, processing of data between digital subscriber line equipments, which is covered by H04M 11/06
- design of DSL, digital subscriber line, modems, which is covered by H04M 11/06
- exchange of data related to functionalities of home network appliances between a home network and an external network, which is covered by H04L 12/28 H
- management of WDM parameters in optical multiplex systems, which is covered by H04J 14/02
- circuit-switched access networks, which are covered by H04M 7/12 H
- access arrangements for providing telephone service in networks other than PSTN/ISDN, which are covered by H04M 7/0066
(3) In this group the following terms or expressions are used with the meaning indicated:
- ATM means Asynchronous Transfer Mode
- LAN means Local Area Network
- BRAS means Broadband Remote Access Server
- DSLAM means Digital Subscriber Line Access Multiplexer
- MSAN means MultiService Access Node
- DSL means Digital Subscriber Line
- IP means Internet Protocol
- WDM means Wavelength Division Multiplexing
- SDH means Synchronous Digital Hierarchy
- OTN means Optical Transport Network
- PSTN means Public Switched Telephone Network
- ISDN means Integrated Services Digital Network
- TDM means Time-Division Multiplexing
- TDMA means Time Division Multiple Access

WARNING
-
Subgroups of H04L 12/2856 are not complete pending reorganisation. See also H04L 12/5691

Collapse
. . . .
{
Access network architectures
}
. . . . .
{
Point-to-point connection between the data network and the subscribers( encapsulation H04L 12/4633 ; virtual LANs H04L 12/4641 ; routing of packets H04L 12/5689 )
}
. . . . .
{
Point-to-multipoint connection from the data network to the subscribers
}
Collapse
. . . .
{
Arrangements for combining access network resources elements, e.g. channel bonding( multichannel protocols H04L 29/06088 ; routing of packets H04L 12/5689 ; modem pooling H04L 25/14 )
}
. . . . .
{
Logical combinations
}
. . . . .
{
Physical combinations
}
Collapse
. . . .
{
Operational details of access network equipments( admission control or resource allocation in access networks H04L 12/5692 )
}
Collapse
. . . . .
{
Remote access server, e.g. BRAS
}
. . . . . .
{
Termination of subscriber connections
}
. . . . . .
{
Processing of data for distribution to the subscribers
}
. . . . . .
{
Handling of subscriber policies( group policies management H04L 12/244 )
}
Collapse
. . . . .
{
Access multiplexer, e.g. DSLAM( generic distributed time multiplexers, e.g. TDM/TDMA H04J 3/1694 )
}
Collapse
. . . . . .
{
characterised by the network type on the uplink side, i.e. towards the service provider network
}
H04L 12/2881
. . . . . . .
{
IP/Ethernet DSLAM
}
H04L 12/2883
. . . . . . .
{
ATM DSLAM
}
. . . . . . .
{
Arrangements interfacing with optical systems( optical network equipment H04B 10/00 ; optical multiplexers H04J 14/00 )
}
Collapse
. . . . . .
{
characterised by the offered subscriber services
}
. . . . . . .
{
Multiservice, e.g. MSAN
}
. . . . . . .
{
Single service
}
Collapse
. . . . . .
{
characterised by the access multiplexer architecture
}
. . . . . . .
{
Centralized processing
}
. . . . . . .
{
Distributed processing, e.g. on line cards
}
. . . . .
{
Subscriber equipments( DSL modems H04M 11/062 ; cable modems H04L 12/2801 )
}
Collapse
. .
Bus networks
Collapse
. . .
{
Architecture of a communication node( intermediate storage or scheduling H04L 12/5694 ; current supply arrangements H04L 12/10 )
}
NOTE
-
In this group the following terms or expressions are used with the meaning indicated:
. a bus controller is a microprocessor dedicated to input and output of data by a node on a bus;
. a bus master is a device controlling which node accesses the bus at a particular time;
. a bus guardian is a device monitoring the timing of node accesses on the bus;
. a bus interface enhancer is a hardware or software arrangement managing the bus controller or the bus interface to modify its behaviour or providing a transparent interface to the bus controller

. . . .
{
Details regarding a bus controller
}
. . . .
{
Details regarding a bus master
}
. . . .
{
Details regarding a bus guardian
}
. . . .
{
Details regarding a bus interface enhancer
}
. . . .
{
Details regarding the setting of the power status of a node according to activity on the bus
}
. . . .
{
Details regarding the feeding of energy to the node from the bus
}
Collapse
. . .
{
High-speed IEEE 1394 serial bus( bus transfer protocol on a daisy chain bus using an embedded synchronisation G06F 13/426 )
}
. . . .
{
Isochronous transmission
}
. . . .
{
Bandwidth and channel allocation( home automation networks H04L 12/28 H; flow control H04L 12/56 D )
}
. . . .
{
Packet processing; Packet format( packet switches H04L 12/56 S; intermediate storage or scheduling H04L 12/56 Q; Adaptation of digital video signals for transport over a specific network H04N7/24T6 )
}
. . . .
{
Bus configuration( home automation networks H04L 12/28 H; Arrangements for maintenance or administration H04L 12/24 )
}
. . . .
{
Bus arbitration
}
. . . .
{
Bus bridging( LAN interconnection over a bridge based backbone H04L 12/462 ; single bridge functionality H04L 12/462 )
}
. . . .
{
Interconnection with other networks( LAN interconnection over a bridge based backbone H04L 12/462 ; single bridge functionality H04L 12/462 )
}
. . . .
{
Security; Encryption; Content protection( arrangements for network security H04L 29/06 S )
}
. . . .
{
Wireless( wireless communication networks H04W )
}
. . . .
{
Interconnection of audio or video/imaging devices( home automation networks H04L 12/28 H; bitstream network arrangements specially adapted for distribution of digital video signals H04N 7/24 N )
}
. . . .
{
Interconnection of computers and peripherals( printer information exchange with computer G06F 3/12 C )
}
Collapse
. . .
{
Management of data rate on the bus( systems modifying transmission characteristics according to link quality H04L 1/0001 ; negotiation of transmission parameters of transmission speed prior to communication H04L 5/1446 ; adaptive data allocation for multicarrier modulation H04L 27/2608 )
}
. . . .
{
Nodes adapting their rate to the physical link properties( LAN switches H04L12/56S8A )
}
Collapse
. . .
{
involving priority mechanisms( intermediate storage or scheduling H04L 12/5694 ; hybrid switching fabrics H04L 12/6402 ; time-division multiplex systems H04J 3/00 )
}
. . . .
{
by scheduling the transmission of messages at the communication node
}
. . . .
{
by using dedicated slots associated with a priority level
}
. . . .
{
by assigning priority to messages according to a message field
}
Collapse
. . .
{
Flexible bus arrangements( arrangements for maintenance or administration involving management of faults; events, alarms H04L 12/2419 ; automatic restoration of network faults H04L 12/2422 )
}
Collapse
. . . .
{
involving redundancy( error detection or correction of the data by redundancy in hardware using active fault-masking in interconnections G06F 11/2002 ; error detection or correction of the data by redundancy in hardware using active fault-masking in storage systems using spares or by reconfiguring G06F 11/2053 )
}
. . . . .
{
by using a plurality of communication lines
}
. . . . .
{
by using a plurality of bus systems
}
. . . . .
{
by using a plurality of nodes
}
. . . . .
[ N: by using a plurality of master stations]
Collapse
. . .
with centralised control, e.g. polling
. . . .
{
in which slots of a TDMA packet structure are assigned based on a contention resolution carried out at a master unit( TDM/TDMA multiplex systems per se H04J 3/16 D; hybrid switching systems H04L 12/64 )
}
Collapse
. . .
with decentralised control
Collapse
. . . .
with random access, e.g. carrier-sense multiple-access with collision detection (CSMA-CD)
. . . . .
{
using bit-wise arbitration
}
. . . .
with deterministic access, e.g. token passing
Collapse
. .
Loop networks
. . .
{
Synchronisation for ring networks( Time Division Multiplex ring networks, e.g. SDH/SONET H04J 3/08 A )
}
. . .
with centralised control, e.g. polling
Collapse
. . .
with decentralised control
. . . .
with synchronous transmission, e.g. time division multiplex (TDM), slotted rings
. . . .
with asynchronous transmission, e.g. token ring, register insertion
. . .
Ring fault isolation or reconfiguration
{
( for SDH/SONET ring networks H04J 3/085 )
}
. .
Star or tree networks
Collapse
. .
Interconnection of networks
Collapse
. . .
{
LAN interconnection over a backbone network, e.g. Internet, Frame Relay
}
. . . .
{
LAN interconnection over ATM networks
}
. . . .
{
LAN interconnection over narrowband networks, e.g. N-ISDN, PSTN, X.25
}
. . . .
{
LAN interconnection over a LAN backbone
}
Collapse
. . . .
{
LAN interconnection over a bridge based backbone
}
. . . . .
{
Single bridge functionality, e.g. connection of two networks over a single bridge
}
. . .
{
Interconnection of networks using encapsulation techniques, e.g. tunneling
}
. . .
{
Interconnected ring systems
}
Collapse
. . .
{
Virtual LANs, VLANs, e.g. virtual private networks [VPN
}
( virtual private networks for security H04L 29/06612 ; routing of packets H04L 12/5689 ; encapsulation techniques H04L 12/4633 ; LAN interconnection over a bridge based backbone H04L 12/462 ; packet switches H04L 12/5696 )]
NOTE
-
(1) This group covers: - a group of hosts with a common set of requirements that communicate as if they were attached to the same broadcast domain, regardless of their physical location. (2) This group does not cover: - group multicasting, which is covered by H04L 12/18 - configuration of switches supporting VLANs, which is covered by H04L 12/2424 - multiprotocol label switching [MPLS], which is covered by H04L 12/5689 - spanning tree protocol [STP], which is covered by H04L 12/462 - arrangements for network security, which is covered by H04L 29/06612 - encapsulation techniques, which is covered by H04L 12/4633 - access arrangements, which is covered by H04L 12/2856 (3) In this group the following terms or expressions are used with the meaning indicated: - B-Tag means Backbone VLAN Tag - C-Tag means Customer VLAN Tag - GARP means Generic Attribute Registration Protocol - GVRP means GARP VLAN Registration Protocol - I-SID means Service Instance Identifier - MVRP means Multiple VLAN Registration Protocol - PBB means Provider Backbone Bridges - S-Tag means Service VLAN Tag - VLAN means Virtual Local Area Network - VPN means Virtual Private Network - VTP means VLAN Trunking Protocol]

Collapse
. . . .
{
Details on frame tagging( routing of packets H04L 12/5689 ; support for virtual LAN H04L12/56S8D )
}
Collapse
. . . . .
{
wherein a single frame includes a plurality of VLAN tags
}
. . . . . .
{
wherein a VLAN tag represents a customer VLAN, e.g. C-Tag
}
. . . . . .
{
wherein a VLAN tag represents a service provider backbone VLAN, e.g. B-Tag, S-Tag
}
. . . . . .
{
wherein a VLAN tag represents a service instance, e.g. I-SID in PBB
}
. . . . .
{
Operational details on the addition or the stripping of a tag in a frame, e.g. at a provider edge node
}
. . . .
{
Arrangements for supporting untagged frames, e.g. port-based VLANs
}
Collapse
. . . .
{
Dynamic sharing of VLAN information amongst network nodes( configuration of the network or of network elements H04L 12/2424 )
}
. . . . .
{
Arrangements for the registration or de-registration of VLAN attribute values, e.g. VLAN identifiers, port VLAN membership
}
Collapse
. . . . .
{
characterized by the protocol used
}
. . . . . .
{
MVRP [multiple VLAN registration protocol
}
]
. . . . . .
{
GVRP [GARP VLAN registration protocol
}
]
. . . . . .
{
VTP [VLAN trunking protocol
}
]
Collapse
H04L 12/50
.
Circuit switching systems, i.e. systems in which the path is physically permanent during the communication
Collapse
H04L 12/52
. .
using time division techniques( in digital transmission systems H04L 5/22 )
H04L 12/525
. . .
{
involving a stored program control
}
Collapse
H04L 12/54
.
Store-and-forward switching systems( packet switching systems H04L12/70 )
Collapse
. .
{
Packet switching systems
}
Collapse
. . .
{
Transfer mode dependent, e.g. ATM
}
H04L 12/5602
. . . .
{
Bandwidth control in ATM Networks, e.g. leaky bucket
}
H04L 12/5689
. . .
{
Routing of packets
}
H04L 12/569
. . .
{
Flow control
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 47/10

Collapse
H04L 12/5691
. . .
{
Access to open networks; Ingress point selection, e.g. ISP selection
}
H04L 12/5692
. . . .
{
Selection among different networks
}
H04L 12/5693
. . .
{
Queue scheduling in packet switching networks
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 47/50

H04L 12/5694
. . .
{
Queuing arrangements
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 49/90

H04L 12/5695
. . .
{
Admission control; Resource allocation
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 47/70

H04L 12/5696
. . .
{
Packet switches, e.g. Layer 2 switches, Layer 3 switches, Multilayer switches
}
WARNING
-
This subgroup is no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to group H04L 49/00 ]

Collapse
. .
Message switching systems,
{
e.g. electronic mail systems
}
WARNING
-
This subgroup and all its subgroups are no longer used for classification as from 01.05.2012. The backlog of this subgroup is being continuously reclassified to H04L 51/00

H04L 12/5805
. . .
{
with automatic reactions or user delegation, e.g. automatic replies or chatbot
}
Collapse
. . .
{
Real time or near real time messaging, e.g. instant messaging [IM
}
]
H04L 12/5815
. . . .
{
use or manipulation of presence information in messaging( presence management H04L 29/08684 )
}
H04L 12/582
. . . .
{
interacting with other applications or services
}
Collapse
H04L 12/5825
. . .
{
Message adaptation based on network or terminal capabilities
}
H04L 12/583
. . . .
{
with adaptation as to content
}
H04L 12/5835
. . . .
{
with adaptation as to format
}
H04L 12/584
. . .
{
messages including annexed information, e.g. attachments
}
H04L 12/5845
. . .
{
messages including multimedia information( protocols for multimedia communication H04L 29/06176 ; voice messaging in telephonic communication using automatic or semi-automatic exchanges with non-audio components H04M 3/5307 )
}
H04L 12/585
. . .
{
with filtering and selective blocking capabilities
}
H04L 12/5855
. . .
{
with selective forwarding
}
H04L 12/586
. . .
{
including conversation history, e.g. threads
}
H04L 12/5865
. . .
{
messaging using geographical location information( protocols for adapting network applications to user terminal location H04L 29/08657 ; services specially adapted for wireless communication networks making use of the location of users or terminals H04W 4/02 )
}
H04L 12/587
. . .
{
with notification on incoming messages
}
H04L 12/5875
. . .
{
with reliability check, e.g. acknowledgments, fault reporting
}
H04L 12/588
. . .
{
messaging within social networks
}
H04L 12/5885
. . .
{
with provisions for tracking the progress of a message
}
H04L 12/589
. . .
{
unified messaging, e.g. interactions between instant messaging [IM
}
, e-mail or other types of messages such as Converged IP Messaging [CPM]]
H04L 12/5895
. . .
{
in combination with wireless systems( messaging in wireless communication networks H04W 4/12 )
}
Collapse
H04L 12/60
. . .
Manual relay systems, e.g. push-button switching
H04L 12/62
. . . .
with perforated tape storage
Collapse
H04L 12/64
.
Hybrid switching systems
H04L 12/6402
. .
{
Hybrid switching fabrics
}
H04L 12/6418
. .
{
Hybrid transport
}
H04L 12/66
.
Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
Collapse
Details of the apparatus or circuits covered by groups H04L 15/00 or H04L 17/00
Collapse
H04L 13/02
.
Details not particular to receiver or transmitter
H04L 13/04
. .
Driving mechanisms ; Clutches( in general F16 )
H04L 13/06
. .
Tape or page guiding or feeding devices
H04L 13/08
. .
Intermediate storage means
Collapse
H04L 13/10
. .
Distributors
Collapse
H04L 13/12
. . .
Non-mechanical distributors, e.g. relay distributors
H04L 13/14
. . . .
Electronic distributors( in general H03K 17/00 )
H04L 13/16
.
of transmitters, e.g. code-bars, code-discs
Collapse
H04L 13/18
.
of receivers
Collapse
H04L 13/182
. .
{
Printing mechanisms
}
H04L 13/184
. . .
{
Photographic printing and recording
}
H04L 13/186
. .
{
Page printing; tabulating
}
H04L 13/188
. .
{
Projection of the printed matter
}
Collapse
Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code( teaching apparatus therefor G09B ; keyboard switches in general H01H 13/70 , H03K 17/94 ; telegraph tapping keys H01H 21/86 ; coding in connection with keyboards or like devices, in general H03M 11/00 )
H04L 15/03
.
Keys structurally combined with sound generators
Collapse
H04L 15/04
.
Apparatus or circuits at the transmitting end
Collapse
H04L 15/06
. .
with a restricted number of keys, e.g. separate key for each type of code element
H04L 15/08
. . .
with a single key which transmits dots in one position and dashes in a second position
H04L 15/10
. . .
combined with perforating apparatus
Collapse
H04L 15/12
. .
with keyboard co-operating with code-bars
H04L 15/14
. . .
combined with perforating apparatus
H04L 15/16
. .
with keyboard co-operating with code discs
Collapse
H04L 15/18
. .
Automatic transmitters, e.g. controlled by perforated tape
H04L 15/20
. . .
with optical sensing means
H04L 15/22
. .
Apparatus or circuits for sending one or a restricted number of signals, e.g. distress signals
Collapse
H04L 15/24
.
Apparatus or circuits at the receiving end
H04L 15/26
. .
Operating only on reception of predetermined code signals, e.g. distress signals, party-line call signals
Collapse
H04L 15/28
. .
Code reproducing apparatus
H04L 15/285
. . .
{
Telegraph sounders; Apparatus for acoustic reception
}
H04L 15/30
. . .
Writing recorders
H04L 15/32
. . .
Perforating recorders
H04L 15/34
. .
Apparatus for recording received coded signals after translation, e.g. as type-characters
Collapse
Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code( keyboard switches in general H01H 13/70 , H03K 17/94 ; coding in connection with keyboards or like devices, in general H03M 11/00 )
Collapse
H04L 17/02
.
Apparatus or circuits at the transmitting end
Collapse
H04L 17/04
. .
with keyboard co-operating with code-bars
H04L 17/06
. . .
Contact operating means
H04L 17/08
. . .
combined with perforating apparatus
H04L 17/10
. .
with keyboard co-operating with code-discs
Collapse
H04L 17/12
. .
Automatic transmitters, e.g. controlled by perforated tape
H04L 17/14
. . .
with optical sensing means
Collapse
H04L 17/16
.
Apparatus or circuits at the receiving end
H04L 17/18
. .
Code selection mechanisms
H04L 17/20
. .
using perforating recorders
H04L 17/22
. .
using mechanical translation and type-bar printing
H04L 17/24
. .
using mechanical translation and type-head printing, e.g. type-wheel, type-cylinder
H04L 17/26
. .
using aggregate motion translation
H04L 17/28
. .
using pneumatic or hydraulic translation
H04L 17/30
. .
using electric or electronic translation
Apparatus or local circuits for step-by-step systems
Collapse
Apparatus or local circuits for mosaic printer telegraph systems
H04L 21/02
.
at the transmitting end
H04L 21/04
.
at the receiving end
Collapse
Apparatus or local circuits for systems other than those covered by groups H04L 15/00 to H04L 21/00
.
adapted for orthogonal signalling
Collapse
Baseband systems
Collapse
H04L 25/02
.
Details( circuits in general for handling pulses H03K ; in line transmission systems in general H04B 3/02 );
{
Arrangements for supplying electrical power along data transmission lines( systems for transmitting signals via power distribution lines H04B 3/54 )
}
Collapse
H04L 25/0202
. .
{
Channel estimation
}
Collapse
H04L 25/0204
. . .
{
of multiple channels
}
. . . .
{
of each channel individually
}
. . . .
{
of the composite channel
}
H04L 25/021
. . .
{
Estimation of channel covariance
}
Collapse
. . .
{
of impulse response
}
H04L 25/0214
. . . .
{
of a single coefficient
}
H04L 25/0216
. . . .
{
with estimation of channel length
}
H04L 25/0218
. . . .
{
with detection of nulls
}
H04L 25/022
. . .
{
of frequency response
}
H04L 25/0222
. . .
{
Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency
}
Collapse
H04L 25/0224
. . .
{
using sounding signals
}
. . . .
{
sounding signals per se
}
Collapse
. . . .
{
with direct estimation from sounding signals
}
Collapse
. . . . .
{
with extension to other symbols
}
Collapse
H04L 25/0232
. . . . . .
{
by interpolation between sounding signals
}
H04L 25/0234
. . . . . . .
{
by non-linear interpolation
}
. . . . . .
{
using estimation of the other symbols
}
. . .
{
using blind estimation
}
Collapse
H04L 25/024
. . .
{
channel estimation algorithms
}
Collapse
H04L 25/0242
. . . .
{
using matrix methods
}
H04L 25/0244
. . . . .
{
with inversion
}
. . . . .
{
with factorisation
}
. . . . .
{
Eigen-space methods
}
. . . .
{
using least-mean-square (LMS) method
}
H04L 25/0252
. . . .
{
using third or higher order statistics
}
H04L 25/0254
. . . .
{
using neural network algorithms
}
H04L 25/0256
. . . .
{
Channel estimation using minimum mean square error criteria
}
H04L 25/0258
. . . .
{
Channel estimation using zero-forcing criteria
}
. .
{
Arrangements for coupling transmitters, receivers or transceivers to transmission lines; Line drivers( duplexing arrangements H04L 5/14 )
}
. .
{
Arrangements for detecting the data rate of an incoming signal
}
Collapse
H04L 25/0264
. .
{
Arrangements for coupling to transmission lines( duplexing arrangements H04L 5/14 ) ; line equalisers, line build-out devices H04L 25/03878
}
Collapse
H04L 25/0266
. . .
{
Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
}
H04L 25/0268
. . . .
{
with modulation and subsequent demodulation
}
H04L 25/027
. . . .
{
specifically for telegraph signals( induction coil interrupters H01H 51/34 dynamo-electric generators H02K )
}
Collapse
H04L 25/0272
. . .
{
Arrangements for coupling to multiple lines, e.g. for differential transmission
}
H04L 25/0274
. . . .
{
Arrangements for ensuring balanced coupling
}
H04L 25/0276
. . . .
{
Arrangements for coupling common mode signals
}
. . .
{
Arrangements for impedance matching
}
Collapse
. . .
{
Arrangements specific to the transmitter end
}
H04L 25/0282
. . . .
{
Provision for current-mode coupling
}
H04L 25/0284
. . . .
{
Arrangements to ensure DC-balance
}
Collapse
H04L 25/0286
. . . .
{
Provision of wave shaping within the driver( wave shaping per se H04L 25/03834 )
}
. . . . .
{
the shape being matched to the transmission line( pre-equalisation per se H04L 25/03343 )
}
H04L 25/029
. . . .
{
Provision of high-impedance states
}
Collapse
H04L 25/0292
. . .
{
Arrangements specific to the receiver end
}
H04L 25/0294
. . . .
{
Provision for current-mode coupling
}
H04L 25/0296
. . . .
{
Arrangements to ensure DC-balance
}
H04L 25/0298
. . .
{
Arrangement for terminating transmission lines
}
Collapse
H04L 25/03
. .
Shaping networks in transmitter or receiver, e.g. adaptive shaping networks( impedance networks per se H03H );
{
Receiver end arrangements for processing baseband signals
}
Collapse
. . .
{
Arrangements for removing intersymbol interference
}
Collapse
H04L 25/03012
. . . .
{
operating in the time domain( H04L 25/03165 , H04L 25/03178 take precedence )
}
Collapse
H04L 25/03019
. . . . .
{
adaptive, i.e. capable of adjustment during data reception
}
H04L 25/03025
. . . . . .
{
using a two-tap delay line
}
H04L 25/03031
. . . . . .
{
using only passive components( H04L 25/03025 takes precedence )
}
Collapse
H04L 25/03038
. . . . . .
{
with a non-recursive structure( H04L 25/03031 takes precedence )
}
H04L 25/03044
. . . . . . .
{
using fractionally spaced delay lines or combinations of fractionally integrally spaced taps
}
H04L 25/0305
. . . . . . .
{
using blind adaptation
}
Collapse
. . . . . .
{
with a recursive structure( H04L 25/03031 takes precedence )
}
H04L 25/03063
. . . . . . .
{
using fractionally spaced delay lines or combinations of fractionally and integrally spaced taps
}
H04L 25/0307
. . . . . . .
{
using blind adaptation
}
H04L 25/03076
. . . . . . .
{
not using decision feedback
}
Collapse
H04L 25/03082
. . . . . .
{
Theoretical aspects of adaptive time domain methods
}
H04L 25/03089
. . . . . . .
{
Theory of blind algorithms, recursive or not
}
H04L 25/03095
. . . . . . .
{
Theory of fractional equalisers, recursive or not
}
H04L 25/03101
. . . . . . .
{
Theory of the Kalman algorithm
}
H04L 25/03108
. . . . . . .
{
Theory of recursive equalisers, other than Kalman
}
Collapse
H04L 25/03114
. . . . .
{
non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
}
H04L 25/03121
. . . . . .
{
using a two-tap delay line
}
H04L 25/03127
. . . . . .
{
using only passive components( H04L 25/03121 takes precedence )
}
Collapse
H04L 25/03133
. . . . . .
{
with a non-recursive structure( H04L 25/03127 takes precedence )
}
H04L 25/0314
. . . . . . .
{
using fractionally spaced delay lines or combinations of fractionally integrally spaced taps
}
H04L 25/03146
. . . . . .
{
with a recursive structure( H04L 25/03127 takes precedence )
}
H04L 25/03152
. . . . . .
{
Theoretical aspects of non-adaptive time domain methods
}
H04L 25/03159
. . . .
{
operating in the frequency domain( H04L 25/03165 , H04L 25/03178 take precedence )
}
H04L 25/03165
. . . .
{
using neural networks
}
H04L 25/03171
. . . .
{
Arrangements involving maximum a posteriori probability (MAP) detection
}
NOTE
-
This group contains provisionally all documents which deal with turbo equalisation

Collapse
. . . .
{
Arrangements involving sequence estimation techniques
}
Collapse
H04L 25/03184
. . . . .
{
Details concerning the metric
}
H04L 25/03191
. . . . . .
{
in which the receiver makes a selection between different metrics
}
H04L 25/03197
. . . . . .
{
methods of calculation involving metrics
}
Collapse
H04L 25/03203
. . . . .
{
Trellis search techniques
}
H04L 25/0321
. . . . . .
{
Sorting arrangements therefor
}
H04L 25/03216
. . . . . .
{
using the M-algorithm
}
H04L 25/03222
. . . . . .
{
using the T-algorithm
}
H04L 25/03229
. . . . . .
{
with state-reduction using grouping of states
}
H04L 25/03235
. . . . . .
{
with state-reduction using feedback filtering
}
H04L 25/03242
. . . . . .
{
Methods involving sphere decoding
}
Collapse
H04L 25/03248
. . . . .
{
Arrangements for operating in conjunction with other apparatus
}
NOTE
-
This group covers arrangements in which the sequence estimator is specially adapted to provide signals to, or receive signals from, the other apparatus. The group does not cover the mere juxtaposition of elements

Collapse
H04L 25/03254
. . . . . .
{
Operation with other circuitry for removing intersymbol interference
}
H04L 25/03261
. . . . . . .
{
with impulse-response shortening filters
}
H04L 25/03267
. . . . . . .
{
with decision feedback equalisers
}
H04L 25/03273
. . . . . .
{
with carrier recovery circuitry
}
H04L 25/0328
. . . . . .
{
with interference cancellation circuitry( adaptations for interference cancellation within a sequence estimator H04L 25/03305 ; interference related aspects of direct sequence spread spectrum H04B1/707F ; interference related aspects of frequency hopping spread spectrum H04B1/713F ; see also H04B 1/10 )
}
H04L 25/03286
. . . . . .
{
with channel-decoding circuitry
}
H04L 25/03292
. . . . . .
{
with channel estimation circuitry
}
H04L 25/03299
. . . . . .
{
with noise-whitening circuitry
}
. . . . .
{
Joint sequence estimation and interference removal( joint detection of several desired signals H04L 25/03331 )
}
Collapse
H04L 25/03312
. . . . .
{
Arrangements specific to the provision of output signals
}
H04L 25/03318
. . . . . .
{
Provision of soft decisions
}
H04L 25/03324
. . . . . .
{
Provision of tentative decisions
}
H04L 25/03331
. . . . .
{
Arrangements for the joint estimation of multiple sequences
}
H04L 25/03337
. . . . .
{
Arrangements involving per-survivor processing
}
. . . .
{
Arrangements at the transmitter end
}
H04L 25/03821
. . . .
{
Inter-carrier interference cancellation [ICI]
}
Collapse
H04L 25/03828
. . .
{
Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties( partial response systems H04L 25/497 )
}
Collapse
H04L 25/03834
. . . .
{
using pulse shaping
}
H04L 25/0384
. . . . .
{
Design of pulse shapes( pulse shape for impulse radio H04B 1/7172 )
}
H04L 25/03847
. . . . .
{
Shaping by selective switching of amplifying elements
}
H04L 25/03853
. . . . .
{
Shaping by digital methods other than look up tables or up/down converters
}
H04L 25/03859
. . . . .
{
shaping using look up tables for partial waveforms
}
Collapse
H04L 25/03866
. . . .
{
using scrambling
}
H04L 25/03872
. . . . .
{
Parallel scrambling or descrambling
}
Collapse
H04L 25/03878
. . .
{
Line equalisers; line build-out devices
}
H04L 25/03885
. . . .
{
adaptive
}
Collapse
H04L 25/03891
. . .
{
Spatial equalizers( MIMO diversity systems H04B 7/0413 )
}
Collapse
H04L 25/03898
. . . .
{
codebook-based design( selection of codebook or precoding matrix for MIMO diversity systems H04B 7/0456 )
}
H04L 25/03904
. . . . .
{
cooperative design, e.g. exchanging of codebook information between base stations
}
Collapse
H04L 25/0391
. . . . .
{
construction details of matrices
}
H04L 25/03917
. . . . . .
{
according to the size of the codebook
}
H04L 25/03923
. . . . . .
{
according to the rank
}
H04L 25/03929
. . . . .
{
with layer mapping, e.g. codeword-to layer design( for space-time coding H04L 1/0618 )
}
H04L 25/03936
. . . . .
{
multi-resolution codebooks
}
H04L 25/03942
. . . . .
{
switching between different codebooks
}
Collapse
H04L 25/03949
. . . .
{
equalizer selection or adaptation based on feedback( multiple signaling inclusive of a precoding command for adapting the transmitter H04L 1/0031 ; feedback for transmit diversity systems H04B 7/0619 ; selection of codebook or precoding matrix for MIMO diversity systems H04B 7/0456 )
}
H04L 25/03955
. . . . .
{
in combination with downlink estimations, e.g. downlink path losses
}
Collapse
H04L 25/03961
. . . .
{
design criteria
}
H04L 25/03968
. . . . .
{
mean-square error [MSE]
}
H04L 25/03974
. . . . .
{
throughput maximization
}
H04L 25/0398
. . .
{
Restoration of channel reciprocity
}
H04L 25/03987
. . .
{
Equalisation for sparse channels
}
H04L 25/03993
. . .
{
Noise whitening
}
H04L 25/05
. .
Electric or magnetic storage of signals before transmitting or retransmitting for changing the transmission rate
Collapse
H04L 25/06
. .
Dc level restoring means ; Bias distortion correction
{
decision circuits providing symbol by symbol detection( detection of unique words or other known elements H04L 7/00 , H04J 3/0602 )
}
Collapse
H04L 25/061
. . .
{
providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset( removal of dc offset in coupling arrangements H04L 25/029 , H04L25/02K9G )
}
H04L 25/062
. . . .
{
Setting decision thresholds using feedforward techniques only
}
Collapse
H04L 25/063
. . . .
{
Setting decision thresholds using feedback techniques only
}
H04L 25/064
. . . . .
{
Subtraction of the threshold from the signal, which is then compared to a supplementary fixed threshold
}
H04L 25/065
. . . .
{
Binary decisions
}
H04L 25/066
. . . .
{
Multilevel decisions, not including self-organising maps
}
. . .
{
providing soft decisions, i.e. decisions together with an estimate of reliability( H04L 25/068 and H04L 25/069 take precedence; sequence estimation techniques H04L 25/03178 )
}
H04L 25/068
. . .
{
by sampling faster than the nominal bit rate
}
H04L 25/069
. . .
{
by detecting edges or zero crossings
}
Collapse
H04L 25/08
. .
Modifications for reducing interference ; Modifications for reducing effects due to line faults;
{
Receiver end arrangements for detecting or overcoming line faults
}
H04L 25/085
. . .
{
Arrangements for reducing interference in line transmission systems, e.g. by differential transmission
}
H04L 25/10
. .
Compensating for variations in line balance
{
balancing during the coupling of signals H04L 25/0282
}
H04L 25/12
. .
Compensating for variations in line impedance
{
impedance matching in coupling arrangements H04L 25/0278
}
. .
Channel dividing arrangements
{
in which a single bit stream is divided between several baseband channels and reassembled at the receiver
}
Collapse
H04L 25/20
. .
Repeater circuits ; Relay circuits
H04L 25/202
. . .
{
using mechanical devices( H04L 25/205 takes precedence )
}
H04L 25/205
. . .
{
using tuning forks or vibrating reeds
}
H04L 25/207
. . .
{
using electromagnetic switches
}
. . .
Repeaters for converting two wires to four wires( in general H04B ) ; Repeaters for converting single current to double current
Collapse
H04L 25/24
. . .
Relay circuits using discharge tubes or semiconductor devices
{
( H04L 25/22 takes precedence )
}
Collapse
H04L 25/242
. . . .
{
with retiming
}
H04L 25/245
. . . . .
{
for start-stop signals( detection of start or stop bits H04J 3/0602 )
}
H04L 25/247
. . . . .
{
for synchronous signals
}
H04L 25/26
. . .
Circuits with optical sensing means,
{
i.e. using opto-couplers for isolation
}
Collapse
H04L 25/38
.
Synchronous or start-stop systems, e.g. for Baudot code
Collapse
H04L 25/40
. .
Transmitting circuits ; Receiving circuits( repeater circuits, relay circuits
{
H04L 25/20
}
)
H04L 25/42
. . .
using mechanical distributors
H04L 25/44
. . .
using relay distributors
H04L 25/45
. . .
using electronic distributors( electronic distributors in general H03K 17/00 )
H04L 25/46
. . .
using tuning forks or vibrating reeds
Collapse
H04L 25/49
. . .
using code conversion at the transmitter ; using predistortion ; using insertion of idle bits for obtaining a desired frequency spectrum ; using three or more amplitude levels;
{
Baseband coding techniques specific to data transmission systems( spectral shaping H04L 25/03828 )
}
H04L 25/4902
. . . .
{
Pulse width modulation; Pulse position modulation
}
. . . .
{
using self-synchronising codes, e.g. split-phase codes
}
Collapse
H04L 25/4906
. . . .
{
using binary codes
}
Collapse
H04L 25/4908
. . . . .
{
using mBnB codes
}
Collapse
H04L 25/491
. . . . . .
{
using 1B2B codes
}
H04L 25/4912
. . . . . . .
{
using CMI or 2-HDB-3 code
}
H04L 25/4915
. . . . .
{
using pattern inversion or substitution( H04L 25/4908 takes precedence )
}
Collapse
. . . .
{
using multilevel codes
}
Collapse
H04L 25/4919
. . . . .
{
using balanced multilevel codes( H04L 25/4927 takes precedence )
}
H04L 25/4921
. . . . . .
{
using quadrature encoding, e.g. carrierless amplitude-phase coding
}
Collapse
H04L 25/4923
. . . . .
{
using ternary codes( H04L 25/4927 takes precedence )
}
H04L 25/4925
. . . . . .
{
using balanced bipolar ternary codes
}
. . . . .
{
using levels matched to the quantisation levels of the channel
}
H04L 25/493
. . . .
by transition coding, i.e. the time-position or direction of a transition being encoded before transmission
Collapse
. . . .
by correlative coding, e.g. partial response coding or echo modulation coding
{
transmitters and receivers for partial response systems( transversal equalizers H04L 25/03 ; partial response continuous phase modulation systems H04L 27/18 )
}
H04L 25/4975
. . . . .
{
Correlative coding using Tomlinson precoding, Harashima precoding , Trellis precoding or GPRS
}
Collapse
Modulated-carrier systems
{
( code shift keying in combination with frequency multiplexing H04L 5/06 ; simultaneous bidirectional transmission of ac signals H04L 5/143 ; code shift keying H04L 23/02 ; polarisation shift keying H04B 14/008 ; transmission of data during the active part of a television frame H04N 7/025 )
}
H04L 27/0002
.
{
analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line( duplex arrangements H04L 5/143 )
}
H04L 27/0004
.
{
using wavelets
}
H04L 27/0006
.
{
Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio( for spectrum sharing between different networks H04W 16/14 )
}
H04L 27/0008
.
{
arrangements for allowing a transmitter or receiver to use more than one type of modulation( negotiating modulation type for two-way transmission paths H04L 5/1453 )
}
H04L 27/001
.
{
using chaotic signals( for secret or secure communication H04L 9/001 )
}
H04L 27/0012
.
{
arrangements for identifying the type of modulation
}
H04L 27/0014
.
{
Carrier regulation( of chaotic carriers H04L 27/001 ; for multicarrier receivers H04L 27/2657 )
}
H04L 27/01
.
Equalisers
{
( baseband equalisers H04L 25/03 ; control of amplification H03G ; in analogue transmission systems H04B 3/04 , H04B 7/005 )
}
Collapse
H04L 27/02
.
Amplitude-modulated carrier systems, e.g. using on-off keying ; Single sideband or vestigial sideband modulation( H04L 27/32 takes precedence )
H04L 27/04
. .
Modulator circuits( in general H03C
{
H03K 7/02
}
)
; Transmitter circuits
Collapse
H04L 27/06
. .
Demodulator circuits( in general H03D
{
H03K 9/02
}
)
; Receiver circuits
H04L 27/063
. . .
{
Superheterodyne receivers
}
H04L 27/066
. . .
{
Carrier recovery circuits( H04L 27/2271 takes precedence )
}
H04L 27/08
. .
Amplitude regulation arrangements
Collapse
H04L 27/10
.
Frequency-modulated carrier systems, i.e. using frequency-shift keying( H04L 27/32 takes precedence;
{
continuous phase systems H04L 27/18
}
)
H04L 27/103
. .
{
Chirp modulation( for spread spectrum techniques H04B 1/69 ; for spread spectrum using chirp H04B 2001/6912 )
}
H04L 27/106
. .
{
M-ary FSK
}
Collapse
H04L 27/12
. .
Modulator circuits( in general H03C
{
H03K 7/06
}
)
; Transmitter circuits
{
( continuous phase modulation H04L 27/20 )
}
H04L 27/122
. . .
{
using digital generation of carrier signals( digital function generators G06F 1/02 , H04L 17/10 ; generating pulses having stepped portions using digital techniques H03K 4/026 )
}
H04L 27/125
. . .
{
using a controlled oscillator in an open loop
}
H04L 27/127
. . .
{
using a controlled oscillator in a feedback loop
}
Collapse
H04L 27/14
. .
Demodulator circuits( in general H03D
{
H03K 9/06
}
)
; Receiver circuits
{
( for continuous phase modulation systems H04L 27/22 )
}
H04L 27/142
. . .
{
Compensating direct current components occurring during the demodulation and which are caused by mistuning
}
Collapse
H04L 27/144
. . .
with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
H04L 27/148
. . . .
using filters, including PLL-type filters
Collapse
H04L 27/152
. . . .
using controlled oscillators, e.g. PLL arrangements
H04L 27/1525
. . . . .
{
using quadrature demodulation
}
Collapse
H04L 27/156
. . .
with demodulation using temporal properties of the received signal, e.g. detecting pulse width
H04L 27/1563
. . . .
{
using transition or level detection
}
H04L 27/1566
. . . .
{
using synchronous sampling
}
H04L 27/16
. .
Frequency regulation arrangements
Collapse
H04L 27/18
.
Phase-modulated carrier systems, i.e. using phase-shift keying( H04L 27/32 takes precedence )
{
includes continuous phase systems
}
H04L 27/183
. .
{
Multiresolution systems
}
H04L 27/186
. .
{
in which the information is carried by both the individual signal points and the subset to which the individual signal points belong, e.g. coset coding or related schemes
}
Collapse
H04L 27/20
. .
Modulator circuits( in general H03C
{
H03K 7/04
}
)
; Transmitter circuits
Collapse
H04L 27/2003
. . .
{
for continuous phase modulation( frequency shift keying H04L 27/10 )
}
Collapse
H04L 27/2007
. . . .
{
in which the phase change within each symbol period is constrained( coset coding H04L 27/186 )
}
H04L 27/201
. . . . .
{
in which the allowed phase changes vary with time, e.g. multi-h modulation
}
H04L 27/2014
. . . . .
{
in which the phase changes in a piecewise linear manner during each symbol period, e.g. minimum shift keying, fast frequency shift keying( H04L 27/201 takes precedence )
}
H04L 27/2017
. . . . .
{
in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation( H04L 27/201 takes precedence )
}
Collapse
H04L 27/2021
. . . .
{
in which the phase change per symbol period is not constrained
}
H04L 27/2025
. . . . .
{
in which the phase changes in a piecewise linear manner within each symbol period
}
H04L 27/2028
. . . . .
{
in which the phase changes are non-linear
}
Collapse
H04L 27/2032
. . .
{
for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
}
Collapse
H04L 27/2035
. . . .
{
using a single or unspecified number of carriers
}
H04L 27/2039
. . . . .
{
using microwave technology
}
Collapse
H04L 27/2042
. . . . .
{
with more than two phase states
}
H04L 27/2046
. . . . . .
{
in which the data are represented by carrier phase
}
H04L 27/205
. . . . . .
{
in which the data are represented by the change in phase of the carrier
}
Collapse
H04L 27/2053
. . . .
{
using more than one carrier, e.g. carriers with different phases
}
H04L 27/2057
. . . . .
{
with a separate carrier for each phase state
}
Collapse
H04L 27/206
. . . . .
{
using a pair of orthogonal carriers, e.g. quadrature carriers
}
H04L 27/2064
. . . . . .
{
using microwave technology
}
Collapse
H04L 27/2067
. . . . . .
{
with more than two phase states( H04L 27/2064 takes precedence )
}
H04L 27/2071
. . . . . . .
{
in which the data are represented by the carrier phase, e.g. systems with differential coding
}
H04L 27/2075
. . . . . . .
{
in which the data are represented by the change in carrier phase
}
Collapse
H04L 27/2078
. . . . . . .
{
in which the phase change per symbol period is constrained( coset coding H04L 27/186 )
}
H04L 27/2082
. . . . . . . .
{
for offset or staggered quadrature phase shift keying
}
H04L 27/2085
. . . . . . .
{
with more than one phase shift per symbol period
}
H04L 27/2089
. . . . . . .
{
with unbalanced quadrature channels
}
H04L 27/2092
. . . .
{
with digital generation of the modulated carrier( does not include the modulation of a digitally generated carrier )
}
H04L 27/2096
. . .
{
Arrangements for directly or externally modulating an optical carrier( optical modulation H04B 10/503 )
}
Collapse
H04L 27/22
. .
Demodulator circuits( in general H03D
{
H03K 9/04
}
)
; Receiver circuits
H04L 27/223
. . .
{
Demodulation in the optical domain( optical demodulation H04B 10/676 )
}
Collapse
H04L 27/227
. . .
using coherent demodulation
Collapse
H04L 27/2271
. . . .
{
wherein the carrier recovery circuit uses only the demodulated signals
}
H04L 27/2272
. . . . .
{
using phase locked loops( H04L 27/2273 takes precedence )
}
H04L 27/2273
. . . . .
{
associated with quadrature demodulation, e.g. Costas loop
}
Collapse
H04L 27/2275
. . . .
{
wherein the carrier recovery circuit uses the received modulated signals
}
H04L 27/2276
. . . . .
{
using frequency multiplication or harmonic tracking
}
H04L 27/2277
. . . . .
{
using remodulation
}
H04L 27/2278
. . . . .
{
using correlation techniques, e.g. for spread spectrum signals
}
Collapse
H04L 27/233
. . .
using non-coherent demodulation
H04L 27/2331
. . . .
{
wherein the received signal is demodulated using one or more delayed versions of itself
}
H04L 27/2332
. . . .
{
using a non-coherent carrier
}
H04L 27/2334
. . . .
{
using filters
}
Collapse
H04L 27/2335
. . . .
{
using temporal properties of the received signal
}
H04L 27/2337
. . . . .
{
using digital techniques to measure the time between zero-crossings
}
H04L 27/2338
. . . .
{
using sampling( H04L 27/2331 to H04L 27/2335 take precedence )
}
H04L 27/24
. .
Half-wave signalling systems
Collapse
.
Systems using multi-frequency codes( H04L 27/32 takes precedence )
Collapse
. .
{
Multicarrier modulation systems
}
Collapse
. . .
{
Signal structure
}
. . . .
{
Multiresolution systems( by means of multiresolution subcarriers H04L 27/183 , H04L 27/3488 )
}
Collapse
. . . .
{
Symbol extensions
}
. . . . .
{
Cyclic extensions
}
. . . .
{
Allocation of payload
}
Collapse
. . . .
{
Details of reference signals( H04L 27/262 takes precedence )
}
. . . . .
{
Distribution thereof
}
. . . . .
{
Structure of the reference signals per se
}
Collapse
. . .
{
Peak power aspects
}
Collapse
. . . .
{
Reduction thereof using coding
}
H04L 27/2617
. . . . .
{
using block codes
}
. . . .
{
Reduction thereof using auxiliary subcarriers
}
. . . .
{
Reduction thereof by selection of pilot symbols
}
. . . .
{
Reduction thereof using phase offsets between subcarriers
}
Collapse
. . . .
{
Reduction thereof by clipping
}
. . . . .
{
by soft clipping
}
Collapse
. . .
{
Arrangements specific to the transmitter
}
Collapse
. . . .
{
Modulators
}
Collapse
. . . . .
{
Inverse Fourier transform modulators, e.g. IFFT/IDFT( DFT or FFT computation methods or devices in general G06F 17/141 )
}
. . . . . .
{
modification of IFFT/IDFT modulator for performance improvement
}
. . . . . .
{
with polyphase implementation
}
. . . . . .
{
using partial FFTs
}
Collapse
. . . . .
{
IFFT/IDFT in combination with other circuits for modulation( DFT or FFT computation methods or devices in general G06F 17/141 )
}
. . . . . .
{
with FFT/DFT, e.g. standard SC-FDMA transmitter or DFT-SOFDM
}
. . . . .
{
with direct modulation of individual subcarriers
}
. . . . .
{
Discrete cosine transform modulators
}
. . . . .
{
Filterbank multicarrier (FBMC)
}
. . . . .
{
Wavelet transform modulators( wavelets in general H04L 27/0004 ; wavelet-division H04L 5/0008 )
}
. . . . .
{
using symbol repetition, e.g. time domain realization of distributed FDMA
}
. . . . .
{
with oversampling
}
. . . .
{
using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
}
Collapse
. . .
{
Arrangements specific to the receiver( equalisation H04L 25/03006 , H04L 27/01 )
}
Collapse
H04L 27/2649
. . . .
{
Demodulators
}
Collapse
H04L 27/265
. . . . .
{
Fourier transform demodulators
}
H04L 27/2652
. . . . . .
{
with polyphase implementation
}
H04L 27/2653
. . . . .
{
with direct demodulation of individual subcarriers
}
Collapse
. . . .
{
Synchronisation arrangements
}
. . . . .
{
Frame synchronisation
}
Collapse
. . . . .
{
Carrier synchronisation
}
. . . . . .
{
Coarse or integer frequency offset determination and synchronisation
}
. . . . . .
{
Fine or fractional frequency offset determination and synchronisation
}
Collapse
. . . . .
{
Symbol synchronisation
}
. . . . . .
{
Coarse synchronisation, e.g. by correlation
}
. . . . . .
{
Fine synchronisation, e.g. by positioning the FFT window
}
. . . . .
{
Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
}
Collapse
. . . . .
{
Details of algorithms
}
Collapse
. . . . . .
{
characterised by the domain of operation
}
. . . . . . .
{
Time domain
}
. . . . . . .
{
Frequency domain
}
Collapse
. . . . . .
{
characterised by synchronisation parameters
}
. . . . . . .
{
Pilot or known symbols( structure of pilot symbols H04L 27/2613 ; cell search in orthogonal multiplex systems H04J 11/0069 ; allocation of pilot signals H04L 5/0048 )
}
Collapse
. . . . . . .
{
Blind, i.e. without using known symbols
}
. . . . . . . .
{
using cyclostationarities, e.g. cyclic prefix or postfix
}
. . . . . . . .
{
Decision-aided
}
Collapse
. . . . . .
{
characterised by constraints
}
. . . . . . .
{
Precision
}
. . . . . . .
{
Complexity
}
. . . . . . .
{
Speed of convergence
}
. . . . . . .
{
Range of frequencies or delays tested
}
. . . . . . .
{
Resistance to perturbation, e.g. noise, interference or fading
}
Collapse
. . . . .
{
Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
}
. . . . . .
{
involving interference determination or cancellation( interference mitigation or coordination in orthogonal multiplex systems in general H04J 11/0023 )
}
Collapse
. . . . . .
{
with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
}
H04L 27/2694
. . . . . . .
{
adaptive design
}
. . . . . .
{
with channel estimation, e.g. determination of delay spread, derivative or peak tracking( channel estimation per se H04L 25/0202 )
}
Collapse
. . .
{
in combination with other modulation techniques
}
. . . .
{
double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system
}
H04L 27/28
. .
with simultaneous transmission of different frequencies each representing one code element
H04L 27/30
. .
wherein each code element is represented by a combination of frequencies
Collapse
H04L 27/32
.
Carrier systems characterised by combinations of two or more of the types covered by groups H04L 27/02 , H04L 27/10 , H04L 27/18 or H04L 27/26
Collapse
H04L 27/34
. .
Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
Collapse
H04L 27/3405
. . .
{
Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
}
H04L 27/3411
. . . .
{
reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
}
Collapse
H04L 27/3416
. . . .
{
in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
}
H04L 27/3422
. . . . .
{
in which the constellation is not the n - fold Cartesian product of a single underlying two-dimensional constellation
}
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H04L 27/3427
. . . . .
{
in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation
}
H04L 27/3433
. . . . . .
{
using an underlying square constellation
}
H04L 27/3438
. . . . . .
{
using an underlying generalised cross constellation
}
H04L 27/3444
. . . .
{
by applying a certain rotation to regular constellations
}
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H04L 27/345
. . .
{
Modifications of the signal space to allow the transmission of additional information
}
H04L 27/3455
. . . .
{
in order to facilitate carrier recovery at the receiver end, e.g. by transmitting a pilot or by using additional signal points to allow the detection of rotations
}
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H04L 27/3461
. . . .
{
in order to transmit a subchannel
}
H04L 27/3466
. . . . .
{
by providing an alternative to one signal point
}
H04L 27/3472
. . . . .
{
by switching between alternative constellations
}
H04L 27/3477
. . . . .
{
by using the outer points of the constellation or of the constituent two-dimensional constellations
}
H04L 27/3483
. . . . .
{
using a modulation of the constellation points
}
H04L 27/3488
. . .
{
Multiresolution systems
}
H04L 27/3494
. . .
{
using non - square modulating pulses, e.g. using raised cosine pulses; Partial response QAM, i.e. with partial response pulse shaping( QAM over partial response channels H04L 25/497 )
}
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H04L 27/36
. . .
Modulator circuits ; Transmitter circuits
H04L 27/361
. . . .
{
Modulation using a single or unspecified number of carriers, e.g. with separate stages of phase and amplitude modulation
}
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H04L 27/362
. . . .
{
Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated( H04L 27/366 takes precedence )
}
H04L 27/363
. . . . .
{
using non - square modulating pulses, modulators specifically designed for this( transmission of non - square QAM H04L 27/3494 )
}
H04L 27/364
. . . . .
{
Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels
}
H04L 27/365
. . . .
{
Modulation using digital generation of the modulated carrier( not including modulation of a digitally generated carrier )
}
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H04L 27/366
. . . .
{
Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
}
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H04L 27/367
. . . . .
{
using predistortion
}
H04L 27/368
. . . . . .
{
adaptive predistortion
}
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H04L 27/38
. . .
Demodulator circuits ; Receiver circuits
H04L 27/3809
. . . .
{
Amplitude regulation arrangements
}
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H04L 27/3818
. . . .
{
using coherent demodulation, i.e. using one or more nominally phase synchronous carriers( H04L 27/227 and H04L 27/389 take precedence )
}
H04L 27/3827
. . . . .
{
in which the carrier is recovered using only the demodulated baseband signals
}
H04L 27/3836
. . . . .
{
in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication
}
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H04L 27/3845
. . . .
{
using non - coherent demodulation, i.e. not using a phase synchronous carrier
}
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H04L 27/3854
. . . . .
{
using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
}
H04L 27/3863
. . . . . .
{
Compensation for quadrature error in the received signal
}
H04L 27/3872
. . . . . .
{
Compensation for phase rotation in the demodulated signal
}
H04L 27/3881
. . . . .
{
using sampling and digital processing, not including digital systems which imitate heterodyne or homodyne demodulation
}
H04L 27/389
. . . .
{
with separate demodulation for the phase and amplitude components
}
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Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L 1/00 to H04L 27/00( interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units G06F 13/00 )
{
contains provisionally no documents
}
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H04L 29/02
.
Communication control( in satellite networks H04B 7/185 ) ; Communication processing( H04L 29/12 , H04L 29/14 take precedence )
{
contains provisionally no documents
}
H04L 29/04
. .
for plural communication lines
{
contains provisionally no documents
}
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H04L 29/06
. .
characterised by a protocol
H04L 29/06006
. . .
{
Protocol performance
}
H04L 29/06013
. . .
{
Protocol definition or specification( protocol conformance testing H04L 1/244 ; specification techniques G06F9/44G4S )
}
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H04L 29/0602
. . .
{
Protocols characterised by their application( H04L 29/08081 takes precedence )
}
H04L 29/06027
. . . .
{
Protocols for multimedia communication
}
WARNING
-
This group is no longer used for the classification of new documents as from April 21, 2008. The backlog of this group is being continuously reclassified to subgroups of H04L 29/06176

H04L 29/06034
. . . .
{
Protocols for telewriting; Protocols for networked simulations, virtual reality or games
}
H04L 29/0604
. . . .
{
Protocols for data compression( compression in general H03M 7/30 )
}
H04L 29/06047
. . . .
{
Protocols for client-server architecture
}
H04L 29/06061
. . .
{
Notations for structuring of protocol data, e.g. Abstract Syntax Notation One( ASN 1 )
}
H04L 29/06068
. . .
{
Protocols for interworking or protocol conversion
}
H04L 29/06074
. . .
{
Streamlined, light-weight or high-speed protocols, e.g. express transfer protocol (XTP), byte stream
}
H04L 29/06081
. . .
{
Protocol engines, e.g. VLSIs, transputer
}
H04L 29/06088
. . .
{
Multichannel or multilink protocols
}
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H04L 29/06095
. . .
{
Special adaptations or provisions of the transmission control protocol/internet protocol [TCP/IP
}
or the user datagram protocol [UDP]( network layer protocol adaptations for supporting mobility, e.g. mobile IP H04W 80/04 ; flow control in data switching networks in general H04L 12/569 ; adapting video multiplex streams to a specific network H04N 21/2381 ] )
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H04L 29/06102
. . . .
{
Implementation details of TCP/IP or UDP/IP stack architecture; specification of modified or new header fields( protocols engines in general H04L 29/06081 ; OSI stack based layering aspects H04L 29/08009 ; protocol header analysis in general H04L 29/0653 )
}
H04L 29/06108
. . . . .
{
involving adaptations of sockets based mechanisms( secure socket layer H04L 29/06965 )
}
H04L 29/06115
. . . .
{
Adaptation of TCP data exchange control procedures( generic OSI layer 4 protocols, e.g. SCTP H04L 29/08045 ; TCP or UDP flow control procedures H04L12/56D10 ; error control procedures in general H04L 1/18 )
}
H04L 29/06122
. . . .
{
Adaptation or special uses of UDP protocol
}
H04L 29/06129
. . . .
{
involving combined use or selection criteria between TCP and UDP protocols( multi-protocol arrangements in general H04L 29/06163 ; multilink protocols in general H04L 29/06088 )
}
H04L 29/06136
. . . .
{
IP fragmentation or TCP segmentation aspects( evaluation of maximum transfer unit H04L12/56D27 ; assembly or disassembly of packets in wireless networks H04W 28/065 )
}
H04L 29/06142
. . . .
{
Transitional provisions between IPv4 and IPv6( address translation between IPv4 and IPv6 H04L 29/12358 ; involvement of different protocol versions in wireless network layer protocols, e.g. MIPv4 and MIPv6, H04W 80/045 )
}
H04L 29/06149
. . . .
{
Special adaptations of TCP, UDP or IP to match specific link layer protocols, e.g. ATM, SONET or PPP( IP over ATM H04Q 11/0478 ; special adaptation of TCP protocol for wireless media H04W 80/06 )
}
H04L 29/06156
. . . .
{
Special adaptations of TCP, UDP or IP for interworking of IP based networks with other networks( protocols for interworking in general H04L 29/06068 )
}
H04L 29/06163
. . .
{
Multi-protocol handler, e.g. single device capable of handling multiple protocols
}
H04L 29/0617
. . .
{
Protocols for remote procedure call
}
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H04L 29/06176
. . .
{
Arrangements for real-time multimedia communications( data switching systems for broadcast or conference H04L 12/18 ; message switching systems H04L 12/58 ; television systems H04N 7/00 ; interconnection arrangements between switching centres for working between exchanges having different types of switching equipment where the types of switching equipment comprise PSTN/ISDN equipment and equipment of networks other than PSTN/ISDN H04M 7/1205 ; systems providing special services to telephonic subscribers H04M 3/42 ; network applications in general H04L 29/08081 )
}
NOTE
-
[N: Notes (1) This group covers: • only communications which fulfil the following two conditions: 1. they are based on packet data; 2. there is real-time or pseudo-real-time temporal association between source and destination, or source and network, or destination and network; • provided that the above two conditions are met, this group covers arrangements relating to 1. the transmission of the multimedia data itself, 2. the user-to-user, user-to-network, inter-network or intra-network signalling supporting: a. the establishment of a session for the subsequent transmission of the multimedia data, or b. the maintenance of the session or c. the application services available to the user during the session (unless explicitly excluded in certain cases). (2) This group does not cover: • non-real-time multimedia file transfer, which is covered by H04L 29/08117 . • multimedia store or forward messaging as in e-mail, MMS or the like, which is covered by H04L 12/58 • analogue multimedia streaming, as in analogue television systems, which is covered by H04N 7/00 and H04N 5/00 • bit streaming, i.e. not packet-based, as in ISDN which is covered by H04Q 11/04 • instant messaging, which is covered by H04L 12/581 • any other multimodal data communications which do not meet the conditions of being packet-based and real-time or pseudo-real-time. (3) In this group the following terms or expressions are used with the meaning indicated: • H.323 means International Telecommunication Union Recommendation no. 323, series H, entitled "Packet-based multimedia communications systems" • IP means Internet Protocol • IMS means IP Multimedia Subsystem • ISDN means Integrated Services Digital Network • MGC means Media Gateway Control/Controller • MGCP means Media Gateway Control Protocol • MMS means Multimedia Messaging Service • PBX means Private Branch Exchange • PSTN means Public Switched Telephone Network • QoS means Quality of Service • RTP means Real Time Protocol • RTCP means Real Time Control Protocol • SIP means Session Intiation Protocol • SPAM means unsolicited electronic mail • SPIT means SPAM Prevention in IP Telephony] [N: WARNING [Group H04L 29/06176 or subgroups are not complete pending reorganisation. See also H04L 29/06027 ]

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H04L 29/06183
. . . .
{
Signalling, control or architecture( selecting or control in telephonic networks H04Q 3/00 ; data network management H04L 12/24 ; data network testing or monitoring H04L 12/26 )
}
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H04L 29/0619
. . . . .
{
Signalling or session protocols
}
H04L 29/06197
. . . . . .
{
SIP( Session Initiation Protocol )
}
H04L 29/06204
. . . . . .
{
H.323
}
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H04L 29/0621
. . . . .
{
Network architectures, gateways, control or user entities
}
H04L 29/06217
. . . . . .
{
IMS( IP multimedia subsystem )( wireless communication networks H04W )
}
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H04L 29/06224
. . . . . .
{
Gateways( protocols for interworking or protocol conversion H04L 29/06068 ; interconnection between PSTN/ISDN networks and networks other than PSTN/ISDN H04M 7/1205 ; arrangements for connecting between networks having differing types of switching systems H04L 12/66 )
}
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H04L 29/06231
. . . . . . .
{
Media gateways
}
H04L 29/06238
. . . . . . . .
{
at the edge
}
H04L 29/06244
. . . . . . . .
{
in the network
}
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H04L 29/06251
. . . . . . .
{
Signalling gateways
}
H04L 29/06258
. . . . . . . .
{
at the edge
}
H04L 29/06265
. . . . . . . .
{
in the network
}
H04L 29/06272
. . . . . .
{
MGC( media gateway control ), MGCP or Megaco( decomposed PSTN/ISDN-IP gateways H04M 7/1255 )
}
H04L 29/06278
. . . . . .
{
Call controllers; Call servers
}
H04L 29/06285
. . . . . .
{
Proxies, e.g. SIP proxies
}
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H04L 29/06292
. . . . . .
{
Arrangements providing PBX functionality, e.g. IP PBX( circuit switched PBXs H04M 3/42314 ; PBX networks H04M 7/009 )
}
H04L 29/06299
. . . . . . .
{
for multi-site
}
H04L 29/06306
. . . . . .
{
End-user terminal functionality( substation equipment for use by subscribers H04M 1/00 ; terminal profiles H04L 29/08927 ; terminal emulation H04L 29/08126 ; adaptation for terminals with limited resources or for terminal portability H04L 29/08108 )
}
H04L 29/06312
. . . . . .
{
Application servers( systems providing special services to telephonic subscribers H04M 3/42 )
}
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H04L 29/06319
. . . . .
{
Session control
}
H04L 29/06326
. . . . . .
{
Setup( connection or session management in network applications H04L 29/08576 ; arrangements for peer-to-peer networking in network applications H04L 29/08306 ; negotiation of communication capabilities H04L 29/06537 )
}
H04L 29/06333
. . . . . .
{
Registration( arrangements for addressing or naming in data networks H04L 29/12009 )
}
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H04L 29/0634
. . . . . .
{
Screening( arrangements for screening incoming telephone calls H04M 3/436 ; arrangements for network security H04L 29/06551 )
}
H04L 29/06346
. . . . . . .
{
of unsolicited session attempts, e.g. SPIT( SPAM prevention in IP telephony )( message switching systems H04L 12/58 )
}
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H04L 29/06353
. . . . . .
{
In-session procedures
}
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H04L 29/0636
. . . . . . .
{
session scope modification
}
H04L 29/06367
. . . . . . . .
{
by adding or removing media
}
H04L 29/06374
. . . . . . . .
{
by adding or removing participants
}
H04L 29/0638
. . . . . .
{
Features, e.g. call-forwarding or call hold( systems providing special services to telephonic subscribers H04M 3/42 )
}
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H04L 29/06387
. . . .
{
Services or applications( systems providing special services to telephonic subscribers H04M 3/42 ; contact center services H04M 3/51 ; information services comprising voice H04M 3/487 )
}
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H04L 29/06394
. . . . .
{
Services involving a main real time session and one or more additional parallel sessions( multichannel or multilink protocols H04L 29/06088 ; services and arrangements where telephone services are combined with data services H04M 7/0024 )
}
H04L 29/06401
. . . . . .
{
where at least one of the additional parallel sessions is real time or time sensitive, e.g. white board sharing, collaboration, spawning of a subconference( telewriting, virtual reality or network gaming H04L 29/06034 )
}
H04L 29/06408
. . . . . .
{
where none of the additional parallel sessions is real time or time sensitive, e.g. downloading a file in a parallel FTP session, initiating an email, combinational services( file transfer H04L 29/08117 ; WEB based applications H04L 29/0809 ; message switching systems H04L 12/58 ; instant messaging H04L 12/581 )
}
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H04L 29/06414
. . . . .
{
Arrangements for multiparty communication e.g. conference( television conferencing systems H04N 7/15 ; telephonic conference systems H04M 3/56 ; data switching systems for broadcast or conference H04L 12/18 )
}
H04L 29/06421
. . . . . .
{
with central floor control
}
H04L 29/06428
. . . . . .
{
with distributed floor control
}
H04L 29/06435
. . . . . .
{
without floor control
}
H04L 29/06442
. . . . .
{
"Push-to-X" services( Push-to-Talk services in wireless networks H04W 4/025 )
}
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H04L 29/06448
. . . . .
{
Services related to one way streaming
}
H04L 29/06455
. . . . . .
{
Multicast or broadcast( data switching systems for broadcast or conference H04L 12/18 ; television systems in general H04N 5/00 , H04N 7/00 ; arrangements for broadcast or distribution combined with broadcast H04H 20/00 ; arrangements for broadcast applications with a direct linkage of broadcast information H04H 60/00 ; arrangements for push based network services H04L 29/08693 )
}
H04L 29/06462
. . . . . .
{
Content on demand( television systems using two way working H04N 7/173 )
}
H04L 29/06469
. . . . . .
{
Control of source by destination, e.g. user controlling streaming rate of server( television systems using two way working H04N 7/173 )
}
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H04L 29/06476
. . . .
{
Media handling, encoding, streaming or conversion
}
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H04L 29/06482
. . . . .
{
Media manipulation, adaptation or conversion( transmission of television signals using pulse code modulation H04N 7/24 ; adaptation for terminals or networks with limited resources or for terminal portability H04L 29/08108 ; data reduction or adaptation H04L 29/08792 ; network application being adapted for the location of the user terminal H04L 29/08657 )
}
H04L 29/06489
. . . . . .
{
at the source
}
H04L 29/06496
. . . . . .
{
at the destination
}
H04L 29/06503
. . . . . .
{
intermediate
}
H04L 29/0651
. . . . .
{
Stream encoding details( transmission of television signals using pulse code modulation H04N 7/24 ; protocols for data compression H04L 29/0604 ; header parsing or analysis H04L 29/0653 )
}
H04L 29/06517
. . . . .
{
Streaming protocols, e.g. RTP, RTCP
}
H04L 29/06523
. . . .
{
Quality of Service( QoS )aspects( arrangements for scheduling or organising the servicing of requests whereby quality of service or priority requirements are taken into account H04L 29/08954 ; adaptation for terminals and/or networks with limited resources or for terminal portability H04L 29/08108 ; data reduction and/or adaptation H04L 29/08792 ; network application is adapted for the location of the user terminal H04L 29/08657 )
}
H04L 29/0653
. . .
{
Header parsing and analysis
}
H04L 29/06537
. . .
{
Negotiation of communication capabilities
}
H04L 29/06544
. . .
{
Special purpose or proprietary protocols or architectures( H04L 29/08558 takes precedence )
}
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H04L 29/06551
. . .
{
Arrangements for network security( security arrangements for protecting computers or computer systems against unauthorised activity G06F 21/00 ; arrangements for secret or secure communication H04L 9/00 ; security arrangements specially adapted for wireless communication networks H04W 12/00 )
}
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H04L 29/06557
. . . .
{
Separating internal and external traffic, e.g. firewalls
}
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H04L 29/06564
. . . . .
{
Architectural arrangements, e.g. perimeter networks, demilitarized zones
}
H04L 29/06571
. . . . . .
{
Distributed architectures
}
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H04L 29/06578
. . . . .
{
Filtering policies
}
H04L 29/06585
. . . . . .
{
Filtering by address, protocol, port number or service, e.g. IP-address, URL
}
H04L 29/06591
. . . . . .
{
Filtering by information in the payload
}
H04L 29/06598
. . . . . .
{
Stateful filtering
}
H04L 29/06605
. . . . . .
{
Rule management
}
H04L 29/06612
. . . . .
{
Virtual private networks
}
H04L 29/06619
. . . . .
{
Proxies
}
H04L 29/06625
. . . . .
{
Firewall traversal, e.g. tunnelling, creating pinholes
}
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H04L 29/06632
. . . .
{
Protecting information from access by third parties
}
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H04L 29/06639
. . . . .
{
Protecting a party's identity, e.g. anonymous
}
H04L 29/06646
. . . . . .
{
during transmission, i.e. identity only known to the other party or parties involved in the communication
}
H04L 29/06653
. . . . . .
{
Anonymous communication, i.e. identity not known to any party at all
}
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H04L 29/06659
. . . . .
{
Protecting the content, e.g. encryption
}
H04L 29/06666
. . . . . .
{
using symmetric encryption, i.e. same key used for encryption and decryption
}
H04L 29/06673
. . . . . .
{
using asymmetric encryption, i.e. different keys for encryption and decryption
}
H04L 29/0668
. . . . . .
{
using hybrid encryption, i.e. combination of symmetric and asymmetric encryption
}
H04L 29/06687
. . . . . .
{
using dynamic encryption, e.g. stream encryption
}
H04L 29/06693
. . . . . .
{
Re-encryption
}
H04L 29/067
. . . . . .
{
Hardware and software architectures for enhanced packet encryption processing
}
Collapse
H04L 29/06707
. . . .
{
Key management
}
H04L 29/06714
. . . . .
{
Key exchange, e.g. in peer-to-peer networks
}
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H04L 29/06721
. . . . .
{
Key distribution, e.g. centrally by trusted party
}
H04L 29/06727
. . . . . .
{
Hierarchical key distribution, e.g. by multi-tier trusted parties
}
H04L 29/06734
. . . . .
{
for group communications
}
H04L 29/06741
. . . . .
{
One-time keys
}
H04L 29/06748
. . . . .
{
Time-dependent keys, e.g. periodically changing keys
}
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H04L 29/06755
. . . .
{
Authentication mechanisms
}
H04L 29/06761
. . . . .