Method for rerouting a data stream

Details Method for rerouting a data stream Method for rerouting a data stream

1995-08-23

1996-12-31

Olms, Douglas W.

Multiplex communications

Fault recovery

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

39518202, H04L 1224, G06F 1120

Patent

active

055901182

ABSTRACT:
A method is described for rerouting a data stream previously routed via a route through a switching network which has now failed. The method includes the steps of detecting the failure on a link (L19) between first (SN1) and second (SN9) switching nodes in one of these switching nodes (SN1); transmitting from this one switching node (SN1) a request message (REQ) with first (IDA) and second (IDB) address fields containing addresses of the first (1) and second (9) switching nodes, respectively; in each switching node having received the request message (REQ) retransmitting it, until an alternative route for the data stream is found between two end switching nodes of said alternative route; and by one of these end switching nodes (SN1) chosen according to a predetermined rule after the alternative route has been found, allocating the data stream to this alternative route and transmitting it thereon.

REFERENCES:
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Conference Record, IEEE Global Telecommunicaitons Conference, 2-5 Dec. 1990, vol. 1 pp. 459-463, San Diego, CA XP218771, H. Komine et al "A Distributed Restoration Algorithm for Multiple-Link and Node Failures of Transport Networks".
Proceedings, IEEE Global Telecommunications Conference, 29 Nov. -2 Dec. 1993, vol. 3, pp. 1596-1600 Houston, J. Bicknell et al, "Performance Analysis of Fast Distributed Network Restoration Algorithms".
Symposium Record, IEEE 1992 Network Operations and Management Symposium, 6-9 Apr. 1992, Vo. 2 pp. 231-241, Memphis, XP 344698, H. Fujii et al "Transfer Mechanisms and Operation of Self-Healing Algorithms in ATM Networks".
"A fast distributed network restoration algorithm" by C. E. Chow, e.a., published in the Proceedings of the 12th International Phoenix Conference on Computers and Communications, Mar. 23-25, 1993.

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