Method and apparatus for transmitting CQI in wireless communication system
First Claim
Patent Images
1. A method for transmitting a channel quality indicator (CQI), performed by a user equipment, in a wireless communication system, the method comprising:
- receiving, by the user equipment via a first downlink component carrier, a radio resource control (RRC) signal including a bitmap indicating one or more second downlink component carriers, among a plurality of downlink component carriers,wherein each bit in the bitmap has either a value 0 indicating that a corresponding second downlink component carrier is subject to CQI reporting or a value 1 indicating that the corresponding second downlink component carrier is not subject to CQI reporting,wherein at most 5 bits in the bitmap have the value 1;
receiving, by the user equipment via the first downlink component carrier from a base station, an uplink grant including a request for a CQI report for a downlink component carrier set, the downlink component carrier set including the one or more second downlink component carriers which was indicated by the bitmap in the RRC signal;
determining a transmission timing for the CQI report; and
transmitting, by the user equipment on the transmission timing over an uplink component carrier to the base station, the CQI report for one or more second downlink component carriers indicated by the bitmap of the RRC signal among the plurality of downlink component carriers.
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Abstract
A method and apparatus for transmitting a channel quality indicator (CQI) in a wireless communication system are provided. The method includes: receiving a CQI request message requesting a CQI report over a first downlink component carrier; and transmitting a CQI for at least one second downlink component carrier over an uplink component carrier.
5 Citations
13 Claims
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1. A method for transmitting a channel quality indicator (CQI), performed by a user equipment, in a wireless communication system, the method comprising:
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receiving, by the user equipment via a first downlink component carrier, a radio resource control (RRC) signal including a bitmap indicating one or more second downlink component carriers, among a plurality of downlink component carriers, wherein each bit in the bitmap has either a value 0 indicating that a corresponding second downlink component carrier is subject to CQI reporting or a value 1 indicating that the corresponding second downlink component carrier is not subject to CQI reporting, wherein at most 5 bits in the bitmap have the value 1; receiving, by the user equipment via the first downlink component carrier from a base station, an uplink grant including a request for a CQI report for a downlink component carrier set, the downlink component carrier set including the one or more second downlink component carriers which was indicated by the bitmap in the RRC signal; determining a transmission timing for the CQI report; and transmitting, by the user equipment on the transmission timing over an uplink component carrier to the base station, the CQI report for one or more second downlink component carriers indicated by the bitmap of the RRC signal among the plurality of downlink component carriers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless communication apparatus comprising:
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a radio frequency (RF) unit configured to transmit and receive a radio signal; and a processor coupled to the RF unit and configured to; receive, via a first downlink component carrier, a radio resource control (RRC) signal including a bitmap indicating one or more second downlink component carriers, among a plurality of downlink component carriers, wherein each bit in the bitmap has either a value 0 indicating that a corresponding second downlink component carrier is subject to channel quality indicator (CQI) reporting or a value 1 indicating that the corresponding second downlink component carrier is not subject to CQI reporting, wherein at most 5 bits in the bitmap have the value 1; receive, via the first downlink component carrier, an uplink grant including a request for a CQI report for a downlink component carrier set, the downlink component carrier set including the one or more second downlink component carriers which was indicated by the bitmap in the RRC signal, determine a transmission timing for the CQI report, and transmit, on the transmission timing over an uplink component carrier, the CQI report for one or more second downlink component carriers indicated by the bitmap of the RRC signal among the plurality of downlink component carriers.
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Specification