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System and method for time synchronization in a wireless network

  • US 7,688,802 B2
  • Filed: 05/11/2009
  • Issued: 03/30/2010
  • Est. Priority Date: 05/23/2008
  • Status: Active Grant
First Claim
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1. A system comprising:

  • multiple wireless nodes forming a cluster in a wireless network, each wireless node configured to communicate and exchange data wirelessly based on a clock;

    wherein one of the wireless nodes is configured to operate as a cluster master and each of the other wireless nodes is configured to (i) receive time synchronization information from a parent node, (ii) adjust its clock based on the received time synchronization information, and (iii) broadcast time synchronization information based on the time synchronization information received by that wireless node;

    wherein the time synchronization information received by each of the other wireless nodes is based on time synchronization information provided by the cluster master so that the other wireless nodes substantially synchronize their clocks with the clock of the cluster master; and

    wherein each of the other wireless nodes is configured to automatically select its parent node, the parent nodes arranged into a plurality of levels in the cluster.

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