System for routing packet switched traffic

Details System for routing packet switched traffic System for routing packet switched traffic

1997-04-04

1999-12-28

Vu, Huy D.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370466, H04L 1266

Patent

active

060090979

ABSTRACT:
The system of the invention uses ATM switches as high performance Internet routers by using standard ATM signaling to set up cut-through paths. The cut-through paths are Switched Virtual Paths which are shared with similar flows toward the same destination and a similar Quality of Service (QOS). The concurrency of multiple flows is achieved by using a different Virtual Channel Identification (VCI) for each flow. The cut-through paths are reused to minimize the overhead associated with setting up and tearing down the paths. Depending on the needs of the traffic, different SVCs having different QOS and different bandwidths can be used. Customer service needs and traffic measurements data are used to identify potential cut-through paths. Once a cut-through path is set up, IP mechanisms are used to update the routing tables of related routers and ATM hosts. Specifically, IP protocols' adjacency bring-up procedures and reachability exchanges are used to update routers' routing tables, and ICMP redirect messages are used to update ATM hosts' routing tables. All ATM QOS are available for the cut-through paths.

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H. Esaki et al., "High Speed Datagram Delivery Over Internet Using ATM Technology", IEICE Transactions on Communications, vol. E78-B, No. 8, Aug. 1995, pp. 1208-1217.
E. Roberts, "IP Routing With ATM Speed", Data Communications, vol. 26, No. 1, Jan. 1997, pp. 57/58.
R. Tinsley et al., "ATM MPOA Vs. IP Switching", Data Communications, vol. 25, No. 12, Sep. 1996, pp. 111/112.
G. Parulkar et al., "a.sup.I tPm: A Strategy For Integrating IP With ATM", Computer Communications Review, vol. 25, No. 4, Oct. 1, 1995, pp. 49-58.
E. Roberts, "IP ON", Data Communications, Mar. 1997, pp. 84-96.

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