Patent ID: 8509168

Claim:
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.