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User equipment and method for estimating and updating a timing of a cell in a wireless communications network

  • US 10,219,237 B2
  • Filed: 11/22/2013
  • Issued: 02/26/2019
  • Est. Priority Date: 11/22/2013
  • Status: Active Grant
First Claim
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1. A method in a user equipment for updating a timing of a first cell, wherein the timing is the arrival time of a signal sent from a base station in the first cell relative to a clock in the user equipment, in a wireless communication network, the method comprising:

  • maintaining a timing of a serving cell that serves the user equipment;

    measuring a timing offset for the first cell and for each one of respective one or more second cells, wherein each of the timing offset measurements is a difference between an actual arrival time of a received signal at the user equipment and an expected arrival time of the received signal;

    when a quality of the timing offset measurement of the first cell is below a first threshold,computing a timing offset estimate for the first cell based on the timing offset measurements for the respective one or more second cells; and

    updating the timing of the first cell based on the computed timing offset estimate.

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