Hierarchical telecommunications network with fault recovery

Details Hierarchical telecommunications network with fault recovery Hierarchical telecommunications network with fault recovery

2005-03-01

2005-03-01

Vu, Huy D. (Department: 2665)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S221000

Reexamination Certificate

active

06862263

ABSTRACT:
The present invention is a telecommunications network having a hierarchical architecture which reduces the amount of equipment and processing required to recover from network failures. In an exemplary embodiment, the nodes of the network are divided into high level nodes and low level nodes. High granularity traffic is collected, routed and manipulated at high level nodes, but generally passes through low level nodes, which generally lack the capability for routing and manipulating such high granularity traffic. Equipment savings results from low level nodes lacking the capability to manipulate traffic other than traffic relevant to those nodes or nearby nodes. Each high level node pair is connected by at least three node disjoint paths of low level nodes and links. Less protection capacity is needed, as each node disjoint path is expected to handle only a portion of rerouted traffic in the event of a network equipment failure. Recovery is decentralized, and is thus faster, requires less equipment, and is less susceptible to the failure of a centralized controller than with networks using centralized recovery processing.

REFERENCES:
patent: 4715027 (1987-12-01), Mahapatra et al.
patent: 4773063 (1988-09-01), Hunsperger et al.
patent: 4866704 (1989-09-01), Bergman
patent: 5627889 (1997-05-01), Eslambolchi

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