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Method of routing in an ad hoc network

  • US 7,570,602 B2
  • Filed: 04/19/2005
  • Issued: 08/04/2009
  • Est. Priority Date: 04/20/2004
  • Status: Expired due to Fees
First Claim
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1. A method of routing information in a network having several communication nodes that may be mobile, the routing being done on a route between a source node and a destination node through a set of wireless communication links between the network nodes, the method comprising steps of:

  • structuring a graph in each mobile node, by a link supervision entity on each mobile node, in a form of a bidirectional point-to-point (unicast two-way) link, obtaining substantially all the links Ri,j existing between two nodes Ni and Nj and to form sub-graphs during routing decisions, wherein arcs of these sub-graphs connecting two nodes, substantially share a same set of properties;

    transmitting periodically, by the link supervision entity, packets including;

    an identity of a sender node Ni; and

    a list of the links Ri,j with neighboring node Nj, with characteristics of the links Ri,j;

    receiving, by each link supervision entity, the transmitted packets;

    determining, by each link supervision entity, all neighboring nodes in addition to any available communication resources in order to exchange packets therewithtransmitting, by a transport entity distributed on each node, information from the source node to the destination node as a function of a sub-graph selected by the source node; and

    comparing, at a given node, the properties of the communications communication resources existing between this the given node and the expected properties of the links of the sub-graph considered and creating or breaking the logic links depending on whether or not the observed properties correspond to those expected.

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