Method for rerouting a data stream

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

H - Electricity

04

Q

H04Q 1/22 (2006.01) H04L 12/56 (2006.01) H04L 29/14 (2006.01) H04Q 3/00 (2006.01) H04Q 3/66 (2006.01)

Patent

CA 2156375

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 thesteps of: -detecting the failure on a link (L19/L56) between first (SN1/SN5) and second (SN9/SN6) switching nodes in one of these switching nodes (SN1/SN5); - transmitting from this one switching node (SN1/SN5) a request message (REQ) with first (IDA) and second (IDB) address fields containing addresses of the first (1/5) and second (9/6) 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; - by one of these end switching nodes (SN1/SN5) 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.

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