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Channel state feedback for multi-cell MIMO

  • US 9,801,167 B2
  • Filed: 02/12/2013
  • Issued: 10/24/2017
  • Est. Priority Date: 09/03/2010
  • Status: Expired due to Fees
First Claim
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1. A method for use in a multiple-input multiple-output communication network in which:

  • the network comprises a plurality of cells provided by one or more base stations operable to transmit signals on at least one downlink to and receive signals on at least one uplink from one or more user equipments,a user equipment is operable to feed back to the network reports on channel state information, CSI, relating to one or more channels between the one or more base stations and that user equipment; and

    whereinthe one or more base stations are operable to adapt downlink signals to the one or more user equipments based on the CSI reports, the method comprising;

    identifying uplink resources for a user equipment-initiated channel state message;

    the user equipment judging a need for the user equipment-initiated channel state message based on information not available to the network of a change in capabilities of the user equipment including at least one of;

    number of receiving antennas available, available processing power, and number of transceivers available; and

    if the user equipment judges a need for the user equipment-initiated channel state message, the user equipment sending the user equipment-initiated channel state message to the network using the uplink resources identified.

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