System and method for initiating multilink fragment reassembly

Details System and method for initiating multilink fragment reassembly System and method for initiating multilink fragment reassembly

2007-07-10

2007-07-10

Pham, Chi (Department: 2616)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S474000, C370S476000

Reexamination Certificate

active

10288130

ABSTRACT:
A system and method are provided for initiating the reassembly of received packet fragments in a multilink communication network. The method comprises: receiving packet fragments with corresponding sequence numbers; counting the number of fragments received since the initiation of a pervious packet fragment reassembly; and, initiating packet fragment reassembly in response to the fragment count. Some aspects of the method further comprise: establishing a threshold; and, comparing the fragment count to the threshold. Then, initiating packet fragment reassembly includes initiating packet fragment reassembly when the fragment count equals the threshold. Other aspects of the method comprise tracking a RFC-1990 M value. Then, establishing a threshold includes establishing a WITH_M_UPDATE threshold. Initiating packet fragment reassembly includes initiating packet fragment reassembly in response to the combination of: the fragment count equaling the WITH_M_UPDATE threshold; and, the M value changing since the initiation of a pervious packet fragment reassembly.

REFERENCES:
patent: 6791982 (2004-09-01), Westberg
patent: 6876669 (2005-04-01), Shalom
patent: 7027443 (2006-04-01), Nichols et al.
Sklower, et al, “The PPP Multilink Protocol (MP),” RFC 1990, Network Working Group, Aug. 1996, pp. 1-24.
FRF.16, Multilink Frame Relay UNI/NNI Implementation Agreement, Frame Relay Forum Technical Commitee, Aug. 1999, pp. 1-48.

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