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Methods and apparatus for frame filtering in snoop-based range measurements

  • US 10,082,557 B1
  • Filed: 02/11/2016
  • Issued: 09/25/2018
  • Est. Priority Date: 02/11/2015
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • receiving, at a first communication device, a packet that includes scheduling information for a range measurement signal exchange session between a second communication device and a third communication device;

    determining, at the first communication device, when the range measurement signal exchange session will occur using the scheduling information in the packet;

    in response to determining when the range measurement signal exchange session will occur using the scheduling information in the packet, observing, with the first communication device, the range measurement signal exchange session, includingperforming an initial analysis of range measurement packets received at the first communication device by analyzing transmitter addresses in the range measurement packets to determine whether to further process the range measurement packets for range measurement purposes, wherein the range measurement packets are packets for which the second communication device and the third communication device collectively record respective transmit times and respective receipt times; and

    determining, at the first communication device, range measurements based on observing the one range measurement signal exchange session.

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