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Mobile station assisted timing synchronization in a CDMA communication system

  • US 6,151,311 A
  • Filed: 01/27/1999
  • Issued: 11/21/2000
  • Est. Priority Date: 09/19/1997
  • Status: Expired due to Term
First Claim
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1. A method for time synchronizing a slave base station with a reference base station, comprising the steps of:

  • measuring a round trip delay for at least one signal transmitted from said reference base station to a mobile station and back from said mobile station to said reference base station;

    measuring a first time difference between the time of receipt at said mobile station of a signal transmitted from said slave base station and the time of receipt at said mobile station of a related signal transmitted from said reference base station;

    measuring a second time difference between the receipt at said slave base station of a signal transmitted from said mobile station and the time of transmission of a related signal from said slave base station; and

    computing a timing correction value in accordance with said measured round trip delay, said first time difference, and said second time difference.

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