×

Node location by differential time measurements

  • US 5,247,464 A
  • Filed: 05/25/1989
  • Issued: 09/21/1993
  • Est. Priority Date: 05/25/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for determining locations of nodes along a network segment, said segment having a plurality of nodes coupled thereto, said plurality of nodes having at least a first node and a second node, the method comprising:

  • a. receiving a first packet and a second packet at a first station located at a first location on said segment, the first packet being sent over said network segment by the first node, and the second packet being sent over said network segment by the second node;

    b. recording a first arrival time that is the time at which the first packet arrives at the first station;

    c. recording a second arrival time that is the time at which the second packet arrives at the first station;

    d. receiving the first packet and the second packet at a second station located at a second location of said segment;

    e. recording a third arrival time that is the time at which the first packet arrives at the second station;

    f. recording a fourth arrival time that is the time at which the second packet arrives at the second station; and

    g. computing a distance along said network segment between the first node and second node based solely upon the first, second, third and fourth arrival times and a factor which is independent of packet arrival and transmission times.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×