| US 7,545,830 B1 | ||
| Defragmented packet analysis for differential priority routing | ||
| Gary Culp, Somerville, Ala. (US) | ||
| Assigned to Adtran, Inc., Huntsville, Ala. (US) | ||
| Filed on Jul. 19, 2004, as Appl. No. 10/894,115. | ||
| Int. Cl. H04J 3/24 (2006.01) | ||
| U.S. Cl. 370—474 [370/470] | 6 Claims |
| 1. A method of interfacing frames of information signals received from a router as an upstream portion of a communication
link with a downstream portion of said communication link, said frames containing fragmented frames of first information signals
and non-fragmented frames of second information signals, said method comprising the steps of:
(a) receiving said frames of information signals from said router within a high-level data link (HDLC) receiver as a separate
device between the router and a downstream portion;
(b) analyzing said frames of information signals received from said router of said communication link in step (a), to derive
size information representative of the fragmented frame size of said fragmented frames of first information signals;
(c) defragmenting said fragmented frames of first information signals, to form non-fragmented packets of said first information
signals;
(d) processing said non-fragmented packets of first information signals obtained in step (c) to derive information associated
with the transport of said frames of information signals from said router;
(e) granting priority of transmission to said second information signals relative to said first information signals;
(f) refragmenting said non-fragmented packets of first information signals processed in step (d), in accordance with said
fragmented frame size information derived in step (c), to derive refragmented frames of first information signals; and
(g) transmitting said frames of said second information signals and said refragmented frames of first information signals
from a HDLC transmitter coupled to the HDLC receiver over said second portion of said communication link.
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