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CHANNEL STATE INFORMATION FEEDBACK AND ACQUISITIONMETHOD AND DEVICE

  • US 20180069613A1
  • Filed: 02/03/2016
  • Published: 03/08/2018
  • Est. Priority Date: 03/31/2015
  • Status: Active Grant
First Claim
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1. A method for feeding back channel state information, the method comprising:

  • obtaining, by a terminal, one first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources, and a first correspondence relationship, configured by a network device, wherein the first correspondence relationship comprises a correspondence relationship between the S second-dimension downlink reference signal resources and N first-dimension beam-forming weights, and both S and N are integers greater than 1;

    measuring, by the terminal, a first-dimension downlink reference signal according to the first-dimension downlink reference signal resource to obtain a first-dimension Pre-coding matrix Indicator (PMI), wherein the first-dimension PMI indicates one of the N first-dimension beam-forming weights;

    selecting, by the terminal, one of the S second-dimension downlink reference signal resources for measuring a second-dimension downlink reference signal, according to the obtained first-dimension PMI and the first correspondence relationship; and

    measuring, by the terminal, the second-dimension downlink reference signal, and feeding back channel state information, according to the selected resource for measuring the second-dimension downlink reference signal, wherein the second-dimension downlink reference signal transmitted over the selected second-dimension downlink reference signal resource is transmitted after being beam-formed using the first-dimension beam-forming weight corresponding to the resource.

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