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METHOD AND APPARATUS TO TRIGGER DAG REOPTIMIZATION IN A SENSOR NETWORK

  • US 20120213124A1
  • Filed: 03/09/2011
  • Published: 08/23/2012
  • Est. Priority Date: 02/21/2011
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • maintaining information at a root node of a computer network represented by a directed acyclic graph (DAG), the information indicative of an ideal DAG topology;

    transmitting a discovery request from the root node to each node of the DAG, the discovery request configured to probe the node for metrics indicative of a current topology of the DAG;

    receiving a discovery reply at the root node from the node in response to the discovery request, the discovery reply configured to record the metrics;

    analyzing the metrics at the root node to determine whether the current topology of the DAG deviates from the ideal DAG topology according to a predetermined threshold; and

    if so, dynamically triggering global repair of the DAG at the root node.

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