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Timing advance configuration for multiple uplink component carriers

  • US 9,749,927 B2
  • Filed: 06/20/2016
  • Issued: 08/29/2017
  • Est. Priority Date: 09/30/2010
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • configuring a mobile terminal with a time-aligned uplink reference cell;

    measuring, by the mobile terminal, downlink reception time difference information between a beginning of a first downlink subframe on a target cell that is a non-time-aligned uplink target cell and a beginning of a second downlink subframe on the reference cell, wherein the first downlink subframe and the second downlink subframe refer to a same subframe number;

    determining, by the mobile terminal, a first target timing advance based on at least the measured reception time difference information and on a reference timing advance used for uplink transmissions on the time-aligned reference cell;

    time-aligning, by the mobile terminal, the uplink target cell by adjusting a timing for uplink transmissions on the uplink target cell based on the determined first target timing advance; and

    performing a handover of the mobile terminal to the target cell based on the measurement results and the first target timing advance.

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