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Wireless assisted altitude measurement

  • US 6,518,918 B1
  • Filed: 05/11/2000
  • Issued: 02/11/2003
  • Est. Priority Date: 05/11/2000
  • Status: Expired due to Term
First Claim
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1. A communication device comprising:

  • a pressure sensor for measuring local barometric pressure; and

    a transceiver for communicating with another communication device barometric calibration information based on atmospheric pressure measurements at a known elevation;

    wherein the communication device is a mobile-telephone, a base station belonging to a wireless communication network or a position determination entity.

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