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Method and apparatus for transceiving channel status information in wireless communication system supporting cooperative transmission

  • US 9,596,067 B2
  • Filed: 09/16/2013
  • Issued: 03/14/2017
  • Est. Priority Date: 09/16/2012
  • Status: Active Grant
First Claim
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1. A method for reporting Channel State Information (CSI) by a user equipment (UE) in a wireless communication system, the method comprising:

  • receiving multiple zero-power CSI-reference signal (ZP CSI-RS) configurations associated with multiple transmission points configured to perform coordinated multi-point (CoMP) operation for the UE;

    receiving an enhanced physical downlink control channel (EPDCCH) configuration that identifies one of the multiple ZP CSI-RS configuration;

    receiving information on a CSI process associated with a CSI-RS configuration and a CSI-Interference Measurement (CSI-IM) configuration;

    receiving, via an EPDCCH, downlink control information (DCI) indicating the CSI process; and

    transmitting the CSI based on at least one of the CSI-RS configuration and the CSI-IM configuration for the CSI process,wherein, in receiving the DCI, the UE determines that the DCI of the EPDCCH is not mapped to a resource of a ZP CSI-RS configuration that is identified by the EPDCCH configuration,wherein the CSI-IM configuration indicates resource elements, a period and a subframe offset for interference measurement, andwherein the resource elements, the period and the subframe offset indicated by the CSI-IM configuration are included in one of the multiple ZP CSI-RS configurations.

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