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Method and device for setting channel status information measuring resource in a wireless communication system

  • US 9,264,915 B2
  • Filed: 01/12/2012
  • Issued: 02/16/2016
  • Est. Priority Date: 01/14/2011
  • Status: Active Grant
First Claim
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1. A method for transmitting channel status information (CSI) by a User Equipment (UE) in a wireless communication system, comprising:

  • determining signal characteristics and interference characteristics in a virtual reference resource for calculation of the CSI;

    determining the CSI using the determined signal characteristics and interference characteristics; and

    transmitting the CSI in a subframe n to an eNodeB (eNB),wherein the virtual reference resource is present in a subframe n−

    k (k≧

    4),wherein the determining signal characteristics includes determining whether the subframe n−

    k to which the virtual reference resource is set includes a valid downlink subframe or an invalid downlink subframe,wherein the signal characteristics are determined from a signal measurement result through the virtual reference resource when the subframe n−

    k is determined to be the valid downlink subframe or an average of measurement results of previously received reference signals when the subframe n−

    k is determined to be the invalid downlink subframe,wherein the interference characteristics are determined from a result of interference measurement in the virtual reference resource when the subframe n−

    k is determined to be the valid downlink subframe or an average of measurement results of previously set interference measurement resources when the subframe n−

    k is determined to be the invalid downlink subframe, andwherein the valid downlink subframeis set for the UE,is not multicast or broadcast over a single frequency network (MBSFN) subframe in transmission modes other than a transmission mode for downlink transmission of a maximum of 8 layers,does not include a downlink pilot time slot (DwPTS) field less than a predetermined length, anddoes not belong to a measurement gap set for the UE.

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