Integrating switching and facility networks using ATM

Details Integrating switching and facility networks using ATM Integrating switching and facility networks using ATM

1997-11-19

2000-06-27

Olms, Douglas W.

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

370389, 370409, 370471, H04J 324

Patent

active

06081506&

ABSTRACT:
An efficient approach and corresponding apparatus for selecting virtual paths in a network for routing datagrams achieves effective sharing of capacity without adversely affecting call setup latency. Edge nodes of the network assign calls to virtual paths based on the destination of the call and the current load status of each of a relatively small number of paths. Each call is assigned a VPI (Virtual Path Identifier) corresponding to the path chosen and a VCI (Virtual Circuit Identifier) corresponding to the identity of the call at that edge node. The ATM backbone nodes route calls based solely on the VPI. Capacity management and load balancing is achieved by each edge node keeping track of the load on each access link from its edge node to the rest of the network and of the congestion status of the various links in the network. In one embodiment, the edge node periodically sends information about its usage of the network to a "central fabric network interface" which combines information from all edge nodes, evaluates congestion status for the network links, and forwards that information back to the edge nodes.

REFERENCES:
patent: 5425029 (1995-06-01), Hluchyj et al.
patent: 5610904 (1997-03-01), Eng et al.
patent: 5822319 (1998-10-01), Nagami et al.
patent: 5933412 (1999-08-01), Choudhury et al.

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