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Packet relay system and wireless node

  • US 20100195560A1
  • Filed: 11/24/2009
  • Published: 08/05/2010
  • Est. Priority Date: 01/30/2009
  • Status: Active Grant
First Claim
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1. A packet relay system including a plurality of nodes which relay a data packet to each other, each of the nodes including:

  • an arrival rate calculation unit which calculates an arrival rate of a packet from each node adjacent to the node among the plurality of nodes;

    a link cost calculation unit which calculates a link cost of each adjacent node based on the arrival rate for each adjacent node;

    an accumulated link cost value acquisition unit which acquires, for each adjacent node, an accumulated value of a link cost calculated by each node in a range of nodes from a sink node to each adjacent node among the plurality of nodes;

    a path cost calculation unit which calculates, for each adjacent node, a path cost by adding the link cost calculated to the accumulated value; and

    a packet relay unit which relays the data packet to one adjacent node selected from among nodes adjacent to the node based on the path cost of each adjacent node.

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