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RADIO COMMUNICATION METHOD, RADIO COMMUNICATION SYSTEM, RADIO BASE STATION AND USER TERMINAL

  • US 20150195830A1
  • Filed: 07/26/2013
  • Published: 07/09/2015
  • Est. Priority Date: 08/02/2012
  • Status: Active Grant
First Claim
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1. A radio communication method of a user terminal and a radio base station adopting carrier aggregation, the radio communication method comprising the steps in which:

  • the user terminal;

    generates channel state information of each cell in uplink control channel format 2 or in format 3 based on the number of cells to use in carrier aggregation; and

    feeds back the generated channel state information via resources that the radio base station sets in an uplink control channel of a primary cell at a predetermined time in accordance with an uplink control channel format; and

    the radio base station secures the resources to set in the uplink control channel when the channel state information of the primary cell is generated in uplink control channel format 2, regardless of the number of cells to use in carrier aggregation.

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