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Signaling for configuration of downlink coordinated multipoint communications

  • US 9,385,791 B2
  • Filed: 06/07/2012
  • Issued: 07/05/2016
  • Est. Priority Date: 11/04/2011
  • Status: Active Grant
First Claim
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1. An apparatus to be employed by a user equipment (UE), the apparatus comprising:

  • communications circuitry to communicate with an evolved Node B (eNB) over a wireless communications network;

    feedback circuitry coupled with the communications circuitry, the feedback circuitry to;

    receive, via cell-specific signaling, channel state information (CSI) reference signal (RS) parameters for individual transmission points of a coordinated multi-point (CoMP) Resource Management Set including a plurality of transmission points, wherein the CSI-RS parameters include a predetermined number;

    generate candidate feedback information for the individual transmission points of the CoMP Resource Management Set and transmit the candidate feedback information to the eNB via the communications circuitry;

    receive a first message, from the eNB via UE-specific signaling, to indicate individual transmission points of the CoMP Resource Management set that are included in a CoMP Measurement Set, wherein the first message includes a first bitmap, and wherein individual bits of the first bitmap correspond to respective individual transmission points of the CoMP Resource Management set to indicate whether the individual transmission point is included in the CoMP Measurement Set, and wherein the individual bits are ordered in the first bitmap according to indices corresponding to the individual transmission points;

    generate CSI-RS feedback information for the individual transmission points of the CoMP Measurement Set based on the received CSI-RS parameters, wherein the CSI-RS feedback information is different from the candidate feedback information;

    select a number transmission points of the CoMP Measurement Set based on quality of respective transmissions, wherein the number is less than or equal to the predetermined number;

    transmit the generated CSI-RS feedback information for the selected number of transmission points to the eNB via the communications circuitry; and

    receive a second message, from the eNB via UE specific signaling, including a second bitmap to update the individual transmission points included in the CoMP Measurement Set.

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