Method and apparatus for reporting a channel quality in a wireless communication system
First Claim
1. A method for reporting channel quality by a device in a wireless communication system, the method comprising:
- receiving, by the device, an uplink grant on a physical downlink control channel (PDCCH) through one of a plurality of downlink component carriers (CCs), the uplink grant including an uplink allocation and a channel quality indicator (CQI) request indicating a triggering of CQI reporting,wherein, when a value of the CQI request is set to a first value, the CQI request indicates the triggering of CQI reporting is for one of the plurality of downlink CCs linked to an uplink CC, when the value of the CQI request is set to a second value, the CQI request indicates the triggering of CQI reporting is for a first set of downlink CCs of the plurality of downlink CCs, and when the value of the CQI request is set to a third value, the CQI request indicates the triggering of CQI reporting is for a second set of downlink CCs of the plurality of downlink CCs; and
reporting, by the device, a CQI for a downlink CC indicated by the CQI request through an uplink CC based on the uplink allocation.
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Accused Products
Abstract
The present invention provided a method and apparatus for reporting a channel quality in a wireless communication system. A terminal receives an uplink grant from a base station via one of a plurality of downlink component carriers (CCs). The uplink grant includes a channel quality indicator (CQI) request for instructing uplink allocation and CQI reporting. The terminal reports the CQI of the downlink CC being linked to the base station. The downlink CC being linked is one of the plurality of downlink CCs, which is linked to the uplink CC for which the uplink allocation is scheduled.A method and an apparatus for reporting channel quality are discussed. The method according to an embodiment includes receiving, by a terminal configured with a plurality of downlink component carriers (CCs), control information from a base station, the control information including an uplink allocation and a CQI request, the control information including a carrier indicator field (CIF) indicating an uplink CC in which the uplink allocation is scheduled; and transmitting, by the terminal to the base station, the CQI through an uplink CC. The CQI request indicates one of: a triggering of CQI reporting for one downlink CC linked to the uplink CC, indicated by the CIF, among the plurality of downlink CCs; and a triggering of CQI reporting for a first group of downlink CCs among the plurality of downlink CCs.
17 Citations
24 Claims
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1. A method for reporting channel quality by a device in a wireless communication system, the method comprising:
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receiving, by the device, an uplink grant on a physical downlink control channel (PDCCH) through one of a plurality of downlink component carriers (CCs), the uplink grant including an uplink allocation and a channel quality indicator (CQI) request indicating a triggering of CQI reporting, wherein, when a value of the CQI request is set to a first value, the CQI request indicates the triggering of CQI reporting is for one of the plurality of downlink CCs linked to an uplink CC, when the value of the CQI request is set to a second value, the CQI request indicates the triggering of CQI reporting is for a first set of downlink CCs of the plurality of downlink CCs, and when the value of the CQI request is set to a third value, the CQI request indicates the triggering of CQI reporting is for a second set of downlink CCs of the plurality of downlink CCs; and reporting, by the device, a CQI for a downlink CC indicated by the CQI request through an uplink CC based on the uplink allocation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus configured for reporting channel quality in a wireless communication system, the 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 an uplink grant on a physical downlink control channel (PDCCH) through one of a plurality of downlink component carriers (CCs), the uplink grant including an uplink allocation and a channel quality indicator (CQI) request indicating a triggering of CQI reporting;
wherein, when a value of the CQI request is set to a first value, the CQI request indicates the triggering of CQI reporting is for one of the plurality of downlink CCs linked to an uplink CC, when the value of the CQI request is set to a second value, the CQI request indicates the triggering of CQI reporting is for a first set of downlink CCs of the plurality of downlink CCs, and when the value of the CQI request is set to a third value, the CQI request indicates the triggering of CQI reporting is for a second set of downlink CCs of the plurality of downlink CCs; andreport a CQI for a downlink CC indicated by the CQI request through an uplink CC based on the uplink allocation. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for reporting a channel quality indicator (CQI) in a wireless communication system, the method comprising:
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receiving, by a terminal configured with a plurality of downlink component carriers (CCs), control information via a physical downlink control channel (PDCCH) from a base station, the control information including an uplink allocation and a CQI request, the control information including a carrier indicator (CI) indicating an uplink CC in which the uplink allocation is scheduled; and transmitting, by the terminal to the base station, the CQI via a physical uplink shared channel (PUSCH) of the uplink CC, based on the CQI request and the uplink allocation, wherein the CQI request indicates one of; a triggering of CQI reporting for one downlink CC linked to the uplink CC, indicated by the CI, among the plurality of downlink CCs; and a triggering of CQI reporting for a first group of downlink CCs among the plurality of downlink CCs. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. An apparatus configured to transmit a channel quality indicator (CQI) in a wireless communication system, the apparatus comprising:
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a radio frequency (RF) unit configured with a plurality of downlink component carriers (CCs) and configured to transmit and receive a radio signal; and a processor configured to; control the RF unit to receive control information via a physical downlink control channel (PDCCH) from a base station, the control information including an uplink allocation and a CQI request, the control information including a carrier indicator (CI) indicating an uplink CC in which the uplink allocation is scheduled, and control the RF unit to transmit the CQI via a physical uplink shared channel (PUSCH) of the uplink CC to the base station, based on the CQI request and the uplink allocation, wherein the CQI request indicates one of; a triggering of CQI reporting for one downlink CC linked to the uplink CC, indicated by the CI, among the plurality of downlink CCs; and a triggering of CQI reporting for a first group of downlink CCs among the plurality of downlink CCs. - View Dependent Claims (21, 22, 23, 24)
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Specification