Method and apparatus for performing data flow ingress/egress...

Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network

Reexamination Certificate

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C370S235000

Reexamination Certificate

active

07417950

ABSTRACT:
A method, apparatus and network for transporting layer-2 frames, such as Ethernet MAC, ATM AAL5, and Frame Relay, over MPLS, SONET/SDH, or OTN optical transport networks as well as electrical transport networks is disclosed. The method establishes “pseudo-wires” between, for example, routers, Layer-2 packet switches, or SONET/SDH switches. Inter-related ingress and egress resource tables may be used by provider edge nodes to negotiate consistently managed data tunnels across a provider network on behalf of data flowing from/to a diverse base of customer edge nodes. Detailed network resource information particular to each of the data flows is exchanged between provider edge nodes during the creation of pseudo-wires. Admission control algorithms are applied at the ingress and egress points in order to manage the data flows into a provider network and exiting from a provider network to customer equipment. By applying pseudo-wire shuffling and preemption techniques, the providers can make better use of their network resources by admitting more pseudo-wires.

REFERENCES:
patent: 2002/0097730 (2002-07-01), Langille et al.
patent: 2003/0097443 (2003-05-01), Gillett et al.
patent: 2004/0066779 (2004-04-01), Barrack et al.
patent: 2004/0081172 (2004-04-01), Ould-Brahim
patent: 2004/0223498 (2004-11-01), Sanderson et al.

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