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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 8,879,564 B2
  • Filed: 05/30/2011
  • Issued: 11/04/2014
  • Est. Priority Date: 02/11/2006
  • Status: Expired due to Fees
First Claim
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1. A method of processing a packet in a dedicated unit included in a node of a packet network, the method comprising:

  • receiving a packet at the node in the packet network;

    determining a packet kind of the packet received at the node; and

    prioritizing the packet at the node, based on the packet kind, wherein the prioritizing comprises;

    in response to the packet not being destined for the node, assigning pre-emptive priority to the packet, suspending transmission of another packet that has been partially transmitted, and transmitting the pre-emptive priority packet,in response to the packet being a ping packet destined for the node, changing a field of the ping packet and sending the packet as a response packet; and

    in response to the packet being a response packet destined for the node, computing a round-trip time of the packet.

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