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Method to accurately and securely determine propagation delay and distance between sending and receiving node in packet network using cut-through approach and packet network node for executing the method

  • US 20070189184A1
  • Filed: 11/16/2006
  • Published: 08/16/2007
  • Est. Priority Date: 02/11/2006
  • Status: Active Grant
First Claim
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1. A method of measuring a distance between nodes in a packet network, the method comprising:

  • transmitting a ping packet from a first node to a second node through at least one of a plurality of third nodes;

    determining a departure time of the ping packet;

    transmitting a response packet with respect to the ping packet from the second node to the first node through the at least one of the plurality of the third nodes;

    prioritizing a transmission of at least one of the ping packet and response packet from the at least one of the plurality of third nodes;

    determining a round-trip time by determining an arrival time of the response packet; and

    determining a distance based on the round-trip time and a speed of the ping packet.

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