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Network latency estimation

  • US 8,254,264 B1
  • Filed: 04/28/2006
  • Issued: 08/28/2012
  • Est. Priority Date: 04/28/2006
  • Status: Active Grant
First Claim
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1. A method for estimating latency between a first node and a second node comprising:

  • sending a first signal from the first node to a landmark node along a first path;

    sending a second signal from the second node to the landmark node along a second path;

    wherein the second node is on the path between the first node and the landmark node;

    identifying a common milestone on the first and second paths, wherein the common milestone is a node on the first path between the first node and the landmark node, and on the second path between the second node and the landmark node;

    determining a first distance from the first node to the common milestone;

    determining a second distance from the second node to the common milestone; and

    estimating the latency based on the first and second distances by;

    determining a common milestone that is positioned such that the second node is on a shortest path between the first node and the common milestone by subtracting the first distance from the second distance.

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