Systems and methods for recovering an out-of-service node in a hierarchical network

  • US 10,039,018 B2
  • Filed: 09/18/2014
  • Issued: 07/31/2018
  • Est. Priority Date: 10/27/2011
  • Status: Active Grant
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First Claim
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1. A wireless communication network comprising:

  • a plurality of nodes, each node being configured in wireless communication with at least one other node, and at least one of the plurality of nodes being configured in wireless communication with a utility provider;

    wherein the utility provider and the plurality of nodes are arranged in a hierarchy with the utility provider being highest in the hierarchy, the plurality of nodes being arranged such that two nodes in direct wireless communication with each other include a parent node and a child node, the parent node being higher in the hierarchy with respect to the child node; and

    wherein, when a first node of the plurality of nodes is determined to be out-of-service, the plurality of nodes are configured to perform a recovery procedure to restore the first node to operation, the recovery procedure includingtransmitting a hailing message on a plurality of hailing channels from a second node to the first node, the first node being in a sniffing mode,transmitting a time synchronization signal from the second node to the first node, the second node being in direct wireless communication with the first node, anddetermining, by the first node, whether the time synchronization signal causes a time shift greater than a predefined threshold,wherein the first node is configured to perform a super sniffing mode for a predetermined time period, responsive to determining that the time synchronization signal causes a time shift greater than the predefined threshold, the super sniffing mode comprising searching the plurality of hailing channels in a sequential mode for a hailing signal until the hailing signal is discovered from the parent node,wherein no waiting period exists between each search of the plurality of hailing channels in the sequential mode.

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