×

Tag location monitor

  • US 5,742,237 A
  • Filed: 11/30/1995
  • Issued: 04/21/1998
  • Est. Priority Date: 11/30/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. A monitor network for a tag location system having a plurality of tags which each transmit a tag signal unique to an individual tag and a central station, remote from the monitor network, for communicating with the monitor network using central station messages, and for determining the location of each individual tag based on information derived from the tag signals, the monitor network comprising:

  • a grid of monitors, positioned at a space adjacent to a location of the plurality of tags, for receiving tag signals and delivering monitor messages containing information derived from the tag signals to the central station, for receiving central station messages from the central station and for respectively issuing and delivering monitor messages, from and to individual monitors of the grid;

    wherein the grid of monitors includes monitor software for causing selected adjacent monitors of the grid to transfer messages from a source to an intended destination by sequentially relaying the messages from one monitor to a selected adjacent monitor when the source and intended destination are not adjacent to one another;

    wherein each monitor of the grid receives tag signals and monitor messages, respectively, from tags and monitors within range;

    wherein each monitor of the grid transmits monitor messages including information derived from tag signals to a selected monitor of the grid for forwarding to the central station by sequentially relaying the monitor messages from one monitor to a selected adjacent monitor, and transmits received monitor messages to the selected adjacent monitor of the grid for forwarding to the central station by relaying the monitor messages from one monitor to a selected adjacent monitor; and

    wherein each monitor of the grid transmits central station messages by sequentially relaying the central station messages from one monitor to a selected adjacent monitor toward an intended monitor destination.

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