Ad-hoc network routing protocol including the use of forward...

Details Ad-hoc network routing protocol including the use of forward... Ad-hoc network routing protocol including the use of forward...

H - Electricity

04

W

H04W 84/18 (2009.01) H04W 40/34 (2009.01) H04W 80/00 (2009.01) H04L 29/06 (2006.01)

Patent

CA 2627789

A method of operating an ad-hoc network having a plurality of wireless nodes includes operating the wireless nodes using a routing protocol, such as OLSR, so that the wireless nodes store forward multi-point relay (MPR) spanning tree routes and reverse MPR spanning tree routes. A first wireless node communicates with a second wireless node using a reverse MPR spanning tree route. The method further includes determining whether the reverse MPR spanning tree route has become unavailable between the first and second wireless nodes and that no other reverse MPR spanning tree route has yet become available, and, if so, using at least portions of a forward MPR spanning tree route for communication between the first and second wireless nodes. The symmetric OLSR approach may be effective in avoiding unnecessary route drops caused by the interaction between distribution-of-topology-change-information conditions and exclusively routing via the destination node's reverse-MPR-spanning tree.

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