Method for transmitting CQI in wireless communication system
AssigneeLG Electronics Inc.
InventorsHak Seong Kim, Young Woo Yun, Dae Won Lee, Bong Hoe Kim, Ki Jun Kim
Life of this patent
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Abstract
A method of transmitting a channel quality indicator (CQI) in a wireless communication system is provided. The method includes receiving an uplink grant on a downlink channel, the uplink grant comprising a CQI report indicator, a transport format field and a resource assignment field, the CQI report indicator indicating whether a CQI is reported, the transport format filed indicating a transport format of the CQI, the resource assignment field indicating the number of resource blocks used for reporting the CQI and transmitting the CQI on an uplink channel by using the uplink grant.
Claims11
A method of transmitting a channel quality indicator (CQI) in a wireless communication system, carried in user equipment, the method comprising:
- receiving an uplink grant on a downlink channel, the uplink grant comprising a CQI report indicator, a transport format field and a resource assignment field, the CQI report indicator indicating whether a CQI is to be reported, the transport format field indicating a transport format of the CQI, the resource assignment field indicating a number of resource blocks to be used for reporting the CQI;
- and
- transmitting the CQI on an uplink channel by using the uplink grant when the received CQI report indicator indicates reporting the CQI, the received transport format field indicates a specific modulation and coding scheme (MCS) index selected from a transport format table and a number of computed resource blocks based on the resource assignment field has a value lower than or equal to a threshold,
- wherein the transport format table is a set of MCS indexes used for a transport block for an uplink shared channel (UL-SCH) and the specific MCS index is a reserved MCS index in which a modulation order for uplink (UL) data and a transport block size (TBS) index used to determine a size of the UL data are not designated.
An apparatus for a wireless communication, the apparatus comprising:
- a radio frequency (RF) unit for transmitting and receiving radio signals;
- and
- a processor coupled with the RF unit and configured to:
- receive an uplink grant, the uplink grant comprising a channel quality indicator (CQI) report indicator, a transport format field and a resource assignment field, the CQI report indicator indicating whether a CQI is to be reported, the transport format field indicating a transport format of the CQI, the resource assignment field indicating a number of resource blocks to be used for reporting the CQI;
- and
- transmit the CQI by using the uplink grant when the received CQI report indicator indicates reporting the CQI, the received transport format field indicates a specific modulation and coding scheme (MCS) index selected from a transport format table and a number of computed resource blocks based on the resource assignment field has a value lower than or equal to a threshold,
- wherein the transport format table is a set of MCS indexes used for a transport block for an uplink shared channel (UL-SCH) and the specific MCS index is a reserved MCS index in which a modulation order for uplink (UL) data and a transport block size (TBS) index used to determine a size of the UL data are not designated.
A method of requesting an aperiodic channel quality indicator (CQI) reporting in a wireless communication system, carried in a base station, the method comprising:
- generating an uplink grant comprising a CQI report indicator, a transport format field and a resource assignment field, the CQI report indicator indicating whether an aperiodic CQI is to be reported, the transport format field indicating a transport format of the aperiodic CQI, the resource assignment field indicating a number of resource blocks to be used for reporting the aperiodic CQI;
- and
- transmitting the uplink grant on a downlink channel to request the aperiodic CQI reporting,
- wherein the CQI report indicator indicates reporting the aperiodic CQI and the transport format field indicates a specific modulation and coding scheme (MCS) index selected from a transport format table which is a set of MCS indexes used for a transport block for an uplink shared channel (UL-SCH) and a number of computed resource blocks based on the resource assignment field has a value lower than or equal to a threshold, and
- wherein the specific MCS index is a reserved MCS index in which a modulation order for uplink (UL) data and a transport block size (TBS) index used to determine a size of the UL data are not designated.
Dependencies are inferred from the claim text.