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Adaptive timing synchronization for mesh networks

  • US 8,194,636 B1
  • Filed: 10/05/2007
  • Issued: 06/05/2012
  • Est. Priority Date: 10/05/2006
  • Status: Active Grant
First Claim
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1. A method for timing synchronization for mesh networks comprising:

  • receiving a timing information at a parent node, wherein the timing information is from a received packet, wherein the received packet is sent at a keep-alive interval by a child node using a link to the parent node, and wherein the parent node activates its receiver in a guardband, wherein the guardband has a duration of a guardband duration;

    determining a clock offset based at least in part on the timing information;

    indicating that a decision is to be made to adjust a characteristic of the link based at least in part on the clock offset, wherein the adjustment of the characteristic causes a subsequent transmission from the child node to the parent node to be less likely to be missed due to a timing mismatch between when a next packet is sent by the child node and when the parent node receiver is enabled to receive the next packet, wherein the characteristic comprises the keep alive interval or a guardband time, wherein the subsequent transmission is made according to a repeating frame that indicates a time slot and a frequency for the child node and the parent node to communicate; and

    transmitting from the parent node to the child node a value representative of the clock offset.

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