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Timing synchronization for downlink (DL) transmissions in coordinated multipoint (CoMP) systems

  • US 10,560,247 B2
  • Filed: 07/13/2018
  • Issued: 02/11/2020
  • Est. Priority Date: 11/04/2011
  • Status: Active Grant
First Claim
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1. An apparatus of a user equipment (UE) operable to adjust a receiver timing, the apparatus comprising:

  • memory; and

    one or more processors configured to;

    decode, at the UE, a plurality of channel-state information reference signals (CSI-RSs) received from a plurality of cooperating nodes, wherein the plurality of cooperating nodes are included in a coordination set of a Coordinated MultiPoint (CoMP) system;

    generate, at the UE, a plurality of received RS timings from the plurality of CSI-RSs, wherein the received RS timings represent timings from the plurality of cooperating nodes;

    determine, at the UE, a composite received RS timing from the plurality of received RS timings based, in part, on an earliest received RS timing, wherein the composite received RS timing includes one or more of;

    transmitter (TX) delay, propagation delay of CSI-RSs received from the plurality of cooperating nodes included in the coordination set of the CoMP system, or receiver (RX) delay; and

    adjust, at the UE, the receiver timing based on the composite received RS timing.

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