Class   714	ERROR DETECTION/CORRECTION AND FAULT DETECTION/RECOVERY
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100

DATA PROCESSING SYSTEM ERROR OR FAULT HANDLING

1

. (1 indent ) Reliability and availability

2

.. (2 indent ) Fault recovery

3

... (3 indent ) By masking or reconfiguration

4.1

.... (4 indent ) Of network

4.11

....• (5 indent ) Backup or standby (e.g., failover, etc.)

4.12

....•. (6 indent ) Hot swapping (i.e., while network is up)

4.2

....• (5 indent ) Isolate or remove failed node without replacement (e.g., bypassing, re-routing, etc.)

4.21

....•. (6 indent ) Reintegrate node back into network

4.3

....• (5 indent ) Repair failed node without replacement (i.e., on-line repair)

4.4

....• (5 indent ) Remote repair

4.5

....• (5 indent ) Bus network (e.g., PCI, AGP, etc.)

5.1

.... (4 indent ) Of peripheral subsystem

5.11

....• (5 indent ) Access processor affected (e.g., I/O processor, MMU, or DMA processor, etc.)

6.1

.... (4 indent ) Of memory

6.11

....• (5 indent ) Within single memory device (e.g., disk, etc.)

6.12

....•. (6 indent ) Recovery partition

6.13

....•. (6 indent ) Isolating failed storage location (e.g., sector remapping, etc.)

6.2

....• (5 indent ) Plurality of memory devices (e.g., array, etc.)

6.21

....•. (6 indent ) Array controller

6.22

....•. (6 indent ) RAID

6.23

....•.. (7 indent ) Mirror (i.e., level 1 RAID)

6.24

....•.. (7 indent ) ECC, parity, or fault code (i.e., level 2+ RAID)

6.3

....•. (6 indent ) Backup or standby (e.g., failover, etc.)

6.31

....•.. (7 indent ) Remote repair

6.32

....•. (6 indent ) Replacement of failed memory device

10

.... (4 indent ) Of processor

11

....• (5 indent ) Concurrent, redundantly operating processors

12

....•. (6 indent ) Synchronization maintenance of processors

13

....• (5 indent ) Prepared backup processor (e.g., initializing cold backup) or updating backup processor (e.g., by checkpoint message)

14

.... (4 indent ) Of power supply

15

... (3 indent ) State recovery (i.e., process or data file)

16

.... (4 indent ) Forward recovery (e.g., redoing committed action)

17

....• (5 indent ) Reexecuting single instruction or bus cycle

18

.... (4 indent ) Transmission data record (e.g., for retransmission)

19

.... (4 indent ) Undo record

20

.... (4 indent ) Plural recovery data sets containing set interrelation data (e.g., time values or log record numbers)

21

.... (4 indent ) State validity check

22

.... (4 indent ) With power supply status monitoring

23

... (3 indent ) Resetting processor

24

... (3 indent ) Safe shutdown

25

.. (2 indent ) Fault locating (i.e., diagnosis or testing)

26

... (3 indent ) Artificial intelligence (e.g., diagnostic expert system)

27

... (3 indent ) Particular access structure

28

.... (4 indent ) Substituted emulative component (e.g., emulator microprocessor)

29

....• (5 indent ) Memory emulator feature

30

.... (4 indent ) Built-in hardware for diagnosing or testing within-system component (e.g., microprocessor test mode circuit, scan path)

31

.... (4 indent ) Additional processor for in-system fault locating (e.g., distributed diagnosis program)

32

... (3 indent ) Particular stimulus creation

33

.... (4 indent ) Derived from analysis (e.g., of a specification or by stimulation)

34

.... (4 indent ) Halt, clock, or interrupt signal (e.g., freezing, hardware breakpoint, single-stepping)

35

.... (4 indent ) Substituted or added instruction (e.g., code instrumenting, breakpoint instruction)

36

.... (4 indent ) Test sequence at power-up or initialization

37

... (3 indent ) Analysis (e.g., of output, state, or design)

38.1

.... (4 indent ) Of computer software faults

38.11

....• (5 indent ) Memory dump

38.12

....• (5 indent ) Time-out (i.e., of program)

38.13

....• (5 indent ) Interrupt (i.e., halt the program)

38.14

....• (5 indent ) By remotely

39

.... (4 indent ) Monitor recognizes sequence of events (e.g., protocol or logic state analyzer)

40

... (3 indent ) Component dependent technique

41

.... (4 indent ) For reliability enhancing component (e.g., testing backup spare, or fault injection)

42

.... (4 indent ) Memory or storage device component fault

43

.... (4 indent ) Bus, I/O channel, or network path component fault

44

.... (4 indent ) Peripheral device component fault

45

... (3 indent ) Output recording (e.g., signature or trace)

46

... (3 indent ) Operator interface for diagnosing or testing

47.1

.. (2 indent ) Performance monitoring for fault avoidance

47.2

... (3 indent ) Threshold

47.3

... (3 indent ) Trends (i.e., expectancy)

48

.. (2 indent ) Error detection or notification

49

... (3 indent ) State error (i.e., content of instruction, data, or message)

50

.... (4 indent ) State out of sequence

51

....• (5 indent ) Control flow state sequence monitored (e.g., watchdog processor for control-flow checking)

52

....• (5 indent ) Error checking code

53

.... (4 indent ) Address error

54

.... (4 indent ) Storage content error

55

... (3 indent ) Timing error (e.g., watchdog timer time-out)

56

.... (4 indent ) Bus or I/O channel device fault

57

... (3 indent ) Error forwarding and presentation (e.g., operator console, error display)

699

PULSE OR DATA ERROR HANDLING

700

. (1 indent ) Skew detection correction

701

. (1 indent ) Data formatting to improve error detection correction capability

702

.. (2 indent ) Memory access (e.g., address permutation)

703

. (1 indent ) Testing of error-check system

704

. (1 indent ) Error count or rate

705

.. (2 indent ) Pseudo-error rate

706

.. (2 indent ) Up-down counter

707

.. (2 indent ) Synchronization control

708

.. (2 indent ) Shutdown or establishing system parameter (e.g., transmission rate)

709

. (1 indent ) Data pulse evaluation/bit decision

710

. (1 indent ) Replacement of memory spare location, portion, or segment

711

.. (2 indent ) Spare row or column

712

. (1 indent ) Transmission facility testing

713

.. (2 indent ) For channel having repeater

714

.. (2 indent ) By tone signal

715

.. (2 indent ) Test pattern with comparison

716

... (3 indent ) Loop-back

717

.. (2 indent ) Loop or ring configuration

718

. (1 indent ) Memory testing

719

.. (2 indent ) Read-in with read-out and compare

720

... (3 indent ) Special test pattern (e.g., checkerboard, walking ones)

721

.. (2 indent ) Electrical parameter (e.g., threshold voltage)

722

.. (2 indent ) Performing arithmetic function on memory contents

723

.. (2 indent ) Error mapping or logging

724

. (1 indent ) Digital logic testing

725

.. (2 indent ) Programmable logic array (PLA) testing

726

.. (2 indent ) Scan path testing (e.g., level sensitive scan design (LSSD))

727

... (3 indent ) Boundary scan

728

... (3 indent ) Random pattern generation (includes pseudorandom pattern)

729

... (3 indent ) Plural scan paths

730

... (3 indent ) Addressing

731

... (3 indent ) Clock or synchronization

732

.. (2 indent ) Signature analysis

733

.. (2 indent ) Built-in testing circuit (BILBO)

734

.. (2 indent ) Structural (in-circuit test)

735

.. (2 indent ) Device response compared to input pattern

736

.. (2 indent ) Device response compared to expected fault-free response

737

.. (2 indent ) Device response compared to fault dictionary/truth table

738

.. (2 indent ) Including test pattern generator

739

... (3 indent ) Random pattern generation (includes pseudorandom pattern)

740

... (3 indent ) Having analog signal

741

... (3 indent ) Simulation

742

... (3 indent ) Testing specific device

743

... (3 indent ) Addressing

744

... (3 indent ) Clock or synchronization

745

.. (2 indent ) Determination of marginal operation limits

746

. (1 indent ) Digital data error correction

747

.. (2 indent ) Substitution of previous valid data

748

.. (2 indent ) Request for retransmission

749

... (3 indent ) Retransmission if no ACK returned

750

... (3 indent ) Feedback to transmitter for comparison

751

... (3 indent ) Including forward error correction capability

752

.. (2 indent ) Forward correction by block code

753

... (3 indent ) Double error correcting with single error correcting code

754

... (3 indent ) Error correction during refresh cycle

755

... (3 indent ) Double encoding codes (e.g., product, concatenated)

756

.... (4 indent ) Cross-interleave Reed-Solomon code (CIRC)

757

... (3 indent ) Parallel generation of check bits

758

... (3 indent ) Error correcting code with additional error detection code (e.g., cyclic redundancy character, parity)

759

... (3 indent ) Look-up table encoding or decoding

760

... (3 indent ) Threshold decoding (e.g., majority logic)

761

... (3 indent ) Random and burst error correction

762

... (3 indent ) Burst error correction

763

... (3 indent ) Memory access

764

.... (4 indent ) Error correct and restore

765

.... (4 indent ) Error pointer

766

.... (4 indent ) Check bits stored in separate area of memory

767

.... (4 indent ) Code word for plural n-bit (n>1) storage units (e.g., x4 DRAM's)

768

.... (4 indent ) Error correction code for memory address

769

.... (4 indent ) Dynamic data storage

770

....• (5 indent ) Disk array

771

....• (5 indent ) Tape

772

.... (4 indent ) Code word parallel access

773

.... (4 indent ) Solid state memory

774

... (3 indent ) Adaptive error-correcting capability

775

... (3 indent ) Synchronization

776

... (3 indent ) For packet or frame multiplexed data

777

... (3 indent ) Hamming code

778

... (3 indent ) Nonbinary data (e.g., ternary)

779

... (3 indent ) Variable length data

780

... (3 indent ) Using symbol reliability information (e.g., soft decision)

781

... (3 indent ) Code based on generator polynomial

782

.... (4 indent ) Bose-Chaudhuri-Hocquenghem code

783

.... (4 indent ) Golay code

784

.... (4 indent ) Reed-Solomon code

785

.... (4 indent ) Syndrome computed

786

.. (2 indent ) Forward error correction by tree code (e.g., convolutional)

787

... (3 indent ) Random and burst errors

788

... (3 indent ) Burst error

789

... (3 indent ) Synchronization

790

... (3 indent ) Puncturing

791

... (3 indent ) Sequential decoder (e.g., Fano or stack algorithm)

792

... (3 indent ) Trellis code

793

... (3 indent ) Syndrome decodable (e.g., self orthogonal)

794

... (3 indent ) Maximum likelihood

795

... (3 indent ) Viterbi decoding

796

... (3 indent ) Branch metric calculation

797

.. (2 indent ) Majority decision/voter circuit

798

. (1 indent ) Error detection for synchronization control

799

. (1 indent ) Error/fault detection technique

800

.. (2 indent ) Parity bit

801

... (3 indent ) Parity generator or checker circuit detail

802

... (3 indent ) Even and odd parity

803

... (3 indent ) Parity prediction

804

... (3 indent ) Plural dimension parity check

805

... (3 indent ) Storage accessing (e.g., address parity check)

806

.. (2 indent ) Constant-ratio code (m/n)

807

.. (2 indent ) Check character

808

... (3 indent ) Modulo-n residue check character

809

.. (2 indent ) Code constraint monitored

810

... (3 indent ) Multilevel coding (n>2)

811

.. (2 indent ) Forbidden combination or improper condition

812

... (3 indent ) Specified digital signal or pulse count

813

... (3 indent ) Two key-down detector

814

... (3 indent ) Data timing/clocking

815

... (3 indent ) Time delay/interval monitored

816

... (3 indent ) Two-rail logic

817

... (3 indent ) Noise level

818

... (3 indent ) Missing-bit/drop-out detection

819

.. (2 indent ) Comparison of data

820

... (3 indent ) Plural parallel devices of channels

821

.... (4 indent ) Transmission facility

822

... (3 indent ) Sequential repetition

823

.... (4 indent ) True and complement data

824

... (3 indent ) Device output compared to input

	E-SUBCLASSES

The following subclasses beginning with the letter E are E-subclasses. Each E-subclass corresponds in scope to a classification in a foreign classification system, for example, the European Classification system (ECLA). The foreign classification equivalent to an E-subclass is identified in the subclass definition. In addition to US documents classified in E-subclasses by US examiners, documents are regularly classified in E-subclasses according to the classification practices of any foreign Offices identified in parentheses at the end of the title. For example, "(EPO)" at the end of a title indicates both European and US patent documents, as classified by the EPO, are regularly added to the subclass. E-subclasses may contain subject matter outside the scope of this class.Consult their definitions, or the documents themselves to clarify or interpret titles.

E11.001

ERROR DETECTION; ERROR CORRECTION; MONITORING (EPO)

E11.002

. (1 indent ) Error detection other than by redundancy in data representation, operation, or hardware, or by checking the order of processing (EPO)

E11.003

.. (2 indent ) By time limit, i.e., time-out (EPO)

E11.004

.. (2 indent ) By count or rate limit, e.g., word- or bit count limit, etc. (EPO)

E11.005

.. (2 indent ) By other limits, e.g., analog values, etc. (EPO)

E11.006

.. (2 indent ) By bit configuration check, e.g., of formats or tags, etc. (EPO)

E11.007

. (1 indent ) Error correction, recovery or fault tolerance using at least two different redundancy techniques and at least one technique not involving redundancy (EPO)

E11.008

.. (2 indent ) Fault tolerant software (EPO)

E11.009

.. (2 indent ) In regular structures, i.e., all of the systems nodes have the same number of connections per node (EPO)

E11.01

... (3 indent ) Interconnection networks, i.e., comprising interconnecting link and switching elements (EPO)

E11.011

... (3 indent ) Fault-tolerant routing (EPO)

E11.012

... (3 indent ) In rings and buses (EPO)

E11.013

... (3 indent ) In n-dimensional structures, e.g., arrays, trees, cubes, etc. (EPO)

E11.014

... (3 indent ) Neural networks (EPO)

E11.015

.. (2 indent ) By degradation, i.e., a slow-down occurs but full processing capability is maintained, e.g., discarding a faulty element or unit, etc. (EPO)

E11.016

.. (2 indent ) In systems, e.g., multiprocessors, etc. (EPO)

E11.017

. (1 indent ) Security measures, i.e., ensuring safe condition in the event of error, e.g., for controlling element (EPO)

E11.018

. (1 indent ) Protecting against parasitic influences, e.g., noise, temperatures, etc. (EPO)

E11.019

. (1 indent ) Identification, e.g., of a performed repair, of a defined circuit, etc. (EPO)

E11.02

. (1 indent ) Reliability or availability analysis (EPO)

E11.021

. (1 indent ) Responding to the occurrence of a fault, e.g., fault tolerance, etc. (EPO)

E11.022

.. (2 indent ) Error or fault processing without redundancy, i.e., by taking additional measures to deal with the error/fault (EPO)

E11.023

... (3 indent ) Error or fault handling (EPO)

E11.024

... (3 indent ) Error or fault detection or monitoring (EPO)

E11.025

... (3 indent ) Error or fault reporting or logging (EPO)

E11.026

... (3 indent ) Error or fault localization (EPO)

E11.027

.... (4 indent ) By collation, i.e., correlating different errors (EPO)

E11.028

.... (4 indent ) By identifying the faulty software code (EPO)

E11.029

... (3 indent ) Error or fault analysis (EPO)

E11.03

.. (2 indent ) Error detection or correction by redundancy in data representation, e.g., by using checking codes, etc. (EPO)

E11.031

... (3 indent ) Using codes with inherent redundancy, e.g., n-out-of-m codes (EPO)

E11.032

... (3 indent ) Adding special bits or symbols to the coded information, e.g., parity check, casting out 9's or 11's, etc. (EPO)

E11.033

.... (4 indent ) Using arithmetic codes i.e., codes which are preserved during operation, e.g., modulo 9 or 11 check, etc. (EPO)

E11.034

.... (4 indent ) In memories (EPO)

E11.035

....• (5 indent ) In static stores (EPO)

E11.036

....•. (6 indent ) Integrated on a chip (EPO)

E11.037

....•.. (7 indent ) In cache or content addressable memories (EPO)

E11.038

....•.. (7 indent ) In sector programmable memories, e.g., flash disk, etc. (EPO)

E11.039

....•.. (7 indent ) In multilevel memories (EPO)

E11.04

....•. (6 indent ) To protect a block of data words, e.g., CRC, checksum, etc. (EPO)

E11.041

....•. (6 indent ) To protect individual data words written into, or read out of, the addressable memory subsystem of data processing equipment (EPO)

E11.042

....•.. (7 indent ) Codes or arrangements adapted for a specific type of error (EPO)

E11.043

....•... (8 indent ) Error in accessing a memory location, i.e., addressing error (EPO)

E11.044

....•... (8 indent ) Error in check bits (EPO)

E11.045

....•... (8 indent ) Identification of the type of error (EPO)

E11.046

....•... (8 indent ) Adjacent error, e.g., error in n-bit (n>1) wide storage units, i.e., package error, etc. (EPO)

E11.047

....•... (8 indent ) Simple parity (EPO)

E11.048

....•... (8 indent ) Unidirectional errors (EPO)

E11.049

....•.. (7 indent ) Arrangements adapted for a specific error detection or correction feature (EPO)

E11.05

....•... (8 indent ) Bypassing or disabling error detection or correction (EPO)

E11.051

....•... (8 indent ) Updating check bits on partial write, i.e., read/modify/write (EPO)

E11.052

....•... (8 indent ) Correcting systematically all correctable errors, i.e., scrubbing (EPO)

E11.053

.... (4 indent ) Using single parity bit (EPO)

E11.054

.. (2 indent ) Error detection or correction of the data by redundancy in hardware (EPO)

E11.055

... (3 indent ) Error detection by comparing the output signals of redundant hardware (EPO)

E11.056

.... (4 indent ) In static storage, e.g., matrix, registers, etc. (EPO)

E11.057

.... (4 indent ) In coding, decoding circuits, e.g. parity circuits (EPO)

E11.058

.... (4 indent ) In communications, e.g., transmission, interfaces, etc. (EPO)

E11.059

.... (4 indent ) Control processors, e.g., for sensors, actuators, etc. (EPO)

E11.06

.... (4 indent ) With exchange of data between units (EPO)

E11.061

.... (4 indent ) With data processors, i.e., data processors compare their computations (EPO)

E11.062

.... (4 indent ) In storage with relative movement between record carrier and transducer, e.g., tapes, disks, etc. (EPO)

E11.063

.... (4 indent ) In systems, i.e. comprising a multiplicity of resources, e.g., cpu with its memory and I/O, etc. (EPO)

E11.064

.... (4 indent ) In arithmetic, logic or counter circuits or a combination thereof, e.g., alu, adder, etc. (EPO)

E11.065

.... (4 indent ) In I/O devices or adapters therefor (EPO)

E11.066

....• (5 indent ) Displays (EPO)

E11.067

... (3 indent ) Timing and synchronization therein (EPO)

E11.068

.... (4 indent ) By using fault tolerant clocks (EPO)

E11.069

... (3 indent ) Using passive fault-masking of the redundant circuits, e.g., by quadding or by majority decision circuits, etc. (EPO)

E11.07

.... (4 indent ) Synchronization therefor (EPO)

E11.071

... (3 indent ) Using active fault-masking, e.g., by switching out faulty elements or by switching in spare elements, etc. (EPO)

E11.072

.... (4 indent ) In systems, e.g., multiprocessors, etc. (EPO)

E11.073

....• (5 indent ) In distributed systems (EPO)

E11.074

....•. (6 indent ) In regular structures (EPO)

E11.075

....•.. (7 indent ) Array of processors, e.g., systolic arrays, etc. (EPO)

E11.076

....•.. (7 indent ) Hypercubes (EPO)

E11.077

....•.. (7 indent ) Trees (EPO)

E11.078

.... (4 indent ) In interconnections, e.g., rings, etc. (EPO)

E11.079

....• (5 indent ) Bus (EPO)

E11.08

.... (4 indent ) Data exchange between units, e.g., for updating backup units, etc. (EPO)

E11.081

.... (4 indent ) For control, e.g., actuators, etc. (EPO)

E11.082

.... (4 indent ) In arithmetic units (EPO)

E11.083

.... (4 indent ) Redundant power supplies (EPO)

E11.084

.... (4 indent ) Masking faults in storage systems using spares and/or by reconfiguring (EPO)

E11.085

....• (5 indent ) Removing defective units from operation (EPO)

E11.086

....•. (6 indent ) Bypassing defective units on a serial bus (EPO)

E11.087

....• (5 indent ) With address translations and modifications (EPO)

E11.088

....•. (6 indent ) Handling defects in a Redundant Array of Inexpensive Disks (RAID) by remapping (EPO)

E11.089

....• (5 indent ) Managing spare storage units (EPO)

E11.09

....•. (6 indent ) Hot spares (EPO)

E11.091

....• (5 indent ) Via redundancy in hardware accessing the storage components (EPO)

E11.092

....•. (6 indent ) Using redundant I/O processors, storage control units or array controllers (EPO)

E11.093

....•.. (7 indent ) With serial buses (EPO)

E11.094

....•.. (7 indent ) To file servers (EPO)

E11.095

....•. (6 indent ) Connection redundancy between storage system components (EPO)

E11.096

....•.. (7 indent ) With serial buses (EPO)

E11.097

....•.. (7 indent ) To file servers (EPO)

E11.098

....• (5 indent ) Using the replication of data, e.g., with two or more copies, etc. (EPO)

E11.099

....•. (6 indent ) Duplex memories, e.g., twin boot ROMs, etc. (EPO)

E11.1

....•.. (7 indent ) Duplexed caches, e.g., cashe paired with non-volatile storage, etc. (EPO)

E11.101

....•. (6 indent ) Mirroring, i.e., the concept of maintaining data on two or more units in the same state at all times (EPO)

E11.102

....•.. (7 indent ) Resynchronization of failed mirrors (EPO)

E11.103

....•.. (7 indent ) Mirror management, e.g., pairing of units, etc. (EPO)

E11.104

....•.. (7 indent ) Mirroring on the same storage unit (EPO)

E11.105

....•.. (7 indent ) Mirroring on different storage units with a common controller (RAID 1) (EPO)

E11.106

....•.. (7 indent ) Mirroring with multiple controllers (EPO)

E11.107

....•... (8 indent ) Asynchronous mirroring (EPO)

E11.108

....•... (8 indent ) Synchronous mirroring (EPO)

E11.109

....•. (6 indent ) De-clustering of replicated data (EPO)

E11.11

....•. (6 indent ) Using more than two copies (EPO)

E11.111

.... (4 indent ) In Logic Arrays, e.g., programmable or iterative logic arrays, etc. (EPO)

E11.112

.. (2 indent ) Error detection or correction of the data by redundancy in operation (EPO)

E11.113

... (3 indent ) Saving, restoring, recovering or retrying (EPO)

E11.114

.... (4 indent ) At machine instruction level (EPO)

E11.115

....• (5 indent ) Checkpointing the instruction stream (EPO)

E11.116

....• (5 indent ) For bus or memory accesses (EPO)

E11.117

.... (4 indent ) Of application data (EPO)

E11.118

....• (5 indent ) Backing up, restoring or mirroring files or drives (EPO)

E11.119

....•. (6 indent ) Backing up, i.e., point-in-time backup (EPO)

E11.12

....•.. (7 indent ) Hardware arrangements for backup (EPO)

E11.121

....•.. (7 indent ) Backup Management techniques (EPO)

E11.122

....•... (8 indent ) Recovery techniques (EPO)

E11.123

....•... (8 indent ) Selection of contents (EPO)

E11.124

....•... (8 indent ) Scheduling policy (EPO)

E11.125

....•... (8 indent ) For networked environments (EPO)

E11.126

....•... (8 indent ) Nondisruptive backup (EPO)

E11.127

....•. (6 indent ) Mirroring (EPO)

E11.128

....•. (6 indent ) Distributed database systems; Replica control (EPO)

E11.129

....•.. (7 indent ) Synchronization between mobile agents and networked agents (EPO)

E11.13

....• (5 indent ) Using logs or checkpoints (EPO)

E11.131

....• (5 indent ) In transactions (EPO)

E11.132

.... (4 indent ) At operating system level (EPO)

E11.133

....• (5 indent ) Boot up procedures (EPO)

E11.134

....• (5 indent ) Reconfiguring to eliminate the error (EPO)

E11.135

....• (5 indent ) During software upgrading (EPO)

E11.136

....• (5 indent ) At file system or disk access level (EPO)

E11.137

....• (5 indent ) Restarting or rejuvenating (EPO)

E11.138

....• (5 indent ) Resetting or repowering (EPO)

E11.139

....• (5 indent ) Cleaning up resources (EPO)

E11.14

....• (5 indent ) Suspending and resuming a running system (EPO)

E11.141

....• (5 indent ) Transmit or communication errors (EPO)

E11.142

... (3 indent ) Error detection (EPO)

E11.143

.... (4 indent ) By time redundancy (EPO)

E11.144

. (1 indent ) Error avoidance, e.g., error spreading countermeasures, fault avoidance, etc. (EPO)

E11.145

. (1 indent ) Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g., start-up testing, etc. (EPO)

E11.146

.. (2 indent ) Verification or detection of system hardware configuration (EPO)

E11.147

.. (2 indent ) Logging of test results (EPO)

E11.148

.. (2 indent ) Test methods (EPO)

E11.149

... (3 indent ) Power-On Test, e.g., POST, etc. (EPO)

E11.15

.... (4 indent ) Configuration test (EPO)

E11.151

... (3 indent ) Background testing (EPO)

E11.152

... (3 indent ) Periodic testing (EPO)

E11.153

... (3 indent ) Test trigger logic (EPO)

E11.154

.. (2 indent ) Marginal checking (EPO)

E11.155

.. (2 indent ) Testing of logic operation, e.g., by logic analyzers, etc. (EPO)

E11.156

... (3 indent ) Using Fault Dictionaries (EPO)

E11.157

... (3 indent ) Using Expert Systems (EPO)

E11.158

... (3 indent ) Using Neural Networks (EPO)

E11.159

.. (2 indent ) Functional testing (EPO)

E11.16

... (3 indent ) Reconfiguring circuits for testing, e.g., LSSD, partitioning, etc. (EPO)

E11.161

.... (4 indent ) Test of buses, lines or interfaces, e.g., stuck-at or open line faults, etc. (EPO)

E11.162

.... (4 indent ) Test or error correction or detection circuits (EPO)

E11.163

.... (4 indent ) Test of input/output devices or peripheral units (EPO)

E11.164

.... (4 indent ) Test of ALU (EPO)

E11.165

.... (4 indent ) Test of interrupt circuits (EPO)

E11.166

.... (4 indent ) Test of CPU or processors (EPO)

E11.167

... (3 indent ) By simulating additional hardware, e.g., fault simulation, (EPO)

E11.168

.... (4 indent ) Emulators (EPO)

E11.169

... (3 indent ) Built-in tests (EPO)

E11.17

... (3 indent ) Tester hardware, i.e., output processing circuits, etc. (EPO)

E11.171

.... (4 indent ) Test interface between tester and unit under test (EPO)

E11.172

.... (4 indent ) Using a storage for the test inputs, e.g., test-ROM, script files, etc. (EPO)

E11.173

.... (4 indent ) Remote test (EPO)

E11.174

.... (4 indent ) Using a dedicated service processor for test (EPO)

E11.175

.... (4 indent ) With comparison between actual response and known fault-free response, e.g., signature analyzer, etc. (EPO)

E11.176

.... (4 indent ) In Multi-processor systems, e.g., one processor becoming the test master, etc. (EPO)

E11.177

... (3 indent ) Generation of test inputs, e.g., test vectors, patterns or sequences, etc. (EPO)

E11.178

. (1 indent ) By checking the correct order of processing (EPO)

E11.179

. (1 indent ) Monitoring (EPO)

E11.18

.. (2 indent ) With visual or acoustical indication of the functioning of the machine (EPO)

E11.181

... (3 indent ) Visualization of programs or trace data (EPO)

E11.182

... (3 indent ) Display for diagnostics, e.g., diagnostic result display, self-test user interface, etc. (EPO)

E11.183

.... (4 indent ) Display of waveforms, e.g., of logic analyzers, etc. (EPO)

E11.184

... (3 indent ) Display of status information (EPO)

E11.185

.... (4 indent ) By lamps or LED's (EPO)

E11.186

....• (5 indent ) For error or online/offline status (EPO)

E11.187

.... (4 indent ) Alarm or error message display (EPO)

E11.188

.... (4 indent ) Computer systems status display (EPO)

E11.189

.. (2 indent ) Recording or statistical evaluation of computer activity, e.g., of down time, of input/output operation, etc. (EPO)

E11.19

... (3 indent ) Of interconnections, e.g., interconnecting networks, etc. (EPO)

E11.191

... (3 indent ) Of parallel or distributed programming (EPO)

E11.192

... (3 indent ) Performance measurement (EPO)

E11.193

.... (4 indent ) Workload generation, e.g., scripts, playback etc. (EPO)

E11.194

....• (5 indent ) Benchmarking (EPO)

E11.195

.... (4 indent ) Time measurement, e.g., response time, etc. (EPO)

E11.196

....• (5 indent ) Of active or idle time (EPO)

E11.197

... (3 indent ) Performance evaluation by modeling or statistical analysis (EPO)

E11.198

... (3 indent ) Performance evaluation by simulation (EPO)

E11.199

.... (4 indent ) Trace driven simulation (EPO)

E11.2

... (3 indent ) Performance evaluation by tracing or monitoring (EPO)

E11.201

.... (4 indent ) For interfaces, buses (EPO)

E11.202

.... (4 indent ) For systems (EPO)

E11.203

.... (4 indent ) Address tracing (EPO)

E11.204

.... (4 indent ) Data logging (EPO)

E11.205

.... (4 indent ) Circuit details, i.e., tracer hardware (EPO)

E11.206

.... (4 indent ) For I/O devices (EPO)

E11.207

. (1 indent ) Preventing errors by testing or debugging software (EPO)

E11.208

.. (2 indent ) Software debugging (EPO)

E11.209

... (3 indent ) Compilers or other tools operating on the source text (EPO)

E11.21

... (3 indent ) Debuggers (EPO)

E11.211

... (3 indent ) Error checking code in the program under test (EPO)

E11.212

... (3 indent ) Tracing methods or tools (EPO)

E11.213

... (3 indent ) By using additional hardware (EPO)

E11.214

.... (4 indent ) By making modifications to the CPU (EPO)

E11.215

.... (4 indent ) By monitoring the bus (EPO)

E11.216

.... (4 indent ) By emulating the CPU (EPO)

E11.217

.. (2 indent ) User interfaces for testing or debugging software (EPO)

E11.218

.. (2 indent ) Methods or tools for writing reliable software and for evaluating software (EPO)

E11.219

... (3 indent ) Methods or tools to render software testable (EPO)

E11.22

... (3 indent ) Software metrics (EPO)

	FOREIGN ART COLLECTIONS

FOR000

CLASS-RELATED FOREIGN DOCUMENTS

Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived.

DIGITAL LOGIC TESTING (371/22.1)

FOR100

. (1 indent ) Scan path testing (LSSD) (371/22.3)

FOR101

. (1 indent ) Including test pattern generator (371/27)

DIGITAL DATA ERROR CORRECTION (371/30)

FOR102

. (1 indent ) Block code (371/37.1)

FOR103

.. (2 indent ) Memory access (371/40.1)

FOR104

. (1 indent ) Convolutional code (371/43)

FOR288

ERROR/FAULT ANTICIPATION (371/4)

. (1 indent ) Replacement with spare device or system (371/8.1)

FOR289

.. (2 indent ) Transmission facility or channel (371.8.2)

FOR290

.. (2 indent ) Memory (371/10.1)

FOR291

.. (2 indent ) Transmission facility (371/11.2)

FOR292

.. (2 indent ) Data processor or computer (371/11.3)

DIAGNOSTIC TESTING (371/15.1)

FOR293

. (1 indent ) Programmable processor testing (371/16.1)

FOR294

.. (2 indent ) Emulator device (371/16.2)

FOR295

.. (2 indent ) Watchdog timer (e.g., time-out) (371/16.3)

FOR296

.. (2 indent ) Processor within diverse (microwave, photocopier) (371/16.4)

FOR297

.. (2 indent ) Error or fault, logging or tracking (371/16.5)

FOR298

.. (2 indent ) Dedicated maintenance subsystem (371/18)

FOR299

. (1 indent ) Testing of external device by programmable digital computer (371/20)

FOR300

ERROR DETECTION FOR SYNCHRONIZATION CONTROL (371/47.1)

DATA PROCESSING SYSTEM ERROR OR FAULT HANDLING (714/100)

. (1 indent ) Reliability and availability (714/1)

.. (2 indent ) Fault recovery (714/2)

... (3 indent ) By masking or reconfiguration (714/3)

FOR306

.... (4 indent ) Of network (714/4)

FOR307

.... (4 indent ) Of memory or peripheral subsystem (714/5)

FOR308

....• (5 indent ) Redundant stored data accessed (e.g., duplicated data, error correction coded data, or other parity-type data) (714/6)

FOR309

....•. (6 indent ) Reconfiguration (e.g., adding a replacement storage component (714/7)

FOR310

....• (5 indent ) Isolating failed storage location (e.g., sector remapping) (714/8)

FOR311

....• (5 indent ) Access processor affected (e.g., I/O processor, MMU, DMA processor (714/9)

.. (2 indent ) Fault locating (i.e., diagnosis or testing) (714/25)

... (3 indent ) Analysis (e.g., of output, state, or design) (714/37)

FOR312

.... (4 indent ) Of computer software (714/38)

FOR313

.. (2 indent ) Performance monitoring for fault avoidance (714/47)

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