Path-based restoration for mesh networks

Details Path-based restoration for mesh networks Path-based restoration for mesh networks

H - Electricity

04

L

H04L 29/14 (2006.01) H04B 1/74 (2006.01) H04B 10/20 (2006.01) H04L 12/28 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2270597

Restoration of service in a mesh network upon the failure of a working channel on a link connecting a pair of nodes is accomplished by first attempting to route traffic on an restoration channel in the same link when such a channel is available. If such "localized" restoration can not be accomplished, then the end- point (traffic originating and/or terminating) nodes that are connected by a path that includes the link having the failed working channel then implements a pre- computed path. Each pre-computed path identifies a collection of channels in a series of links that connect the end-point nodes (and any intermediate nodes) so as to bypass traffic around the link having the failed working channel. The pre- computed path information is typically pre-stored in the end-point nodes to enable the end-point nodes to effect rapid restoration in the event localized restoration is not achievable.

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