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Techniques for sending or receiving channel state information reports associated with a coordinated multi-point scheme

  • US 10,098,020 B2
  • Filed: 03/14/2013
  • Issued: 10/09/2018
  • Est. Priority Date: 08/03/2012
  • Status: Active Grant
First Claim
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1. A computer-implemented method comprising:

  • receiving, at user equipment (UE) capable of operating in compliance with one or more 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) standards, a channel state information (CSI) processes set comprising three or more CSI processes, the CSI processes set associated with a coordinated multi-point (CoMP) scheme for the UE to receive coordinated signals from three or more transmission points, each of the three or more CSI processes corresponding to a respective one of the three or more transmission points;

    generating two or more CSI reports using the CSI processes set based on constraining CSI feedback for implementing the CoMP scheme, constraining the CSI feedback to include;

    selecting, by processing circuitry of the UE, two of the three or more transmission points to which the three or more CSI processes correspond; and

    limiting a number of CSI reports based on only considering transmission cases for the two selected transmission points;

    transmitting the two or more generated CSI reports to facilitate implementing the CoMP scheme;

    constraining the CSI feedback to include increasing the amount of time for the UE to process the CSI processes set to generate the two or more CSI reports by;

    determining a CSI value for a given CSI process based on the received CSI processes set at least N subframes prior to receiving a CSI trigger associated with a given one of the two or more CSI reports;

    both generating and sending the given CSI report in K subframes after receiving the CSI trigger, where N and K equate to any positive whole integer; and

    scaling a CSI report generation periodicity associated with each generated CSI report from among the two or more CSI reports such that the UE is capable of serially processing CSI processes sets respectively associated with each generated CSI report.

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