Patent ID: 8861394

Claim:
A method for transmitting control information using a Physical Uplink Control Channel (PUCCH) format 3 by a communication apparatus in a radio communication system, comprising: detecting a Physical Downlink Control Channel (PDCCH) signal; receiving a Physical Downlink Shared Channel (PDSCH) signal corresponding to the PDCCH signal on a secondary cell (SCell); and determining one or more PUCCH resources among a plurality of PUCCH resources configured for the PUCCH format 3, wherein the one or more PUCCH resources are indicated by a value of a Transmit Power Control (TPC) field of the PDCCH signal, wherein if single antenna port transmission mode is configured, the value of the TPC field is mapped to one PUCCH resource as shown in Table 1, wherein if two antenna port transmission mode is configured, the value of the TPC field is mapped to two PUCCH resources as shown in Table 2: TABLE 1 single antenna port transmission mode Value of a PUCCH resource for an TPC field antenna port p0, n PUCCH (3, p0) 00 first PUCCH resource, n PUCCH, 0 (3, p0) 01 second PUCCH resource, n PUCCH, 1 (3, p0) 10 third PUCCH resource, n PUCCH, 2 (3, p0) 11 fourth PUCCH resource, n PUCCH, 3 (3, p0) TABLE 2 two antenna port transmission mode Value of PUCCH resources for antenna ports p0 and p1, TPC field [n PUCCH (3, p0) , n PUCCH (3, p1) ] 00 first PUCCH resources, [n PUCCH, 0 (3, p0) , n PUCCH, 0 (3, p1) ] 01 second PUCCH resources, [n PUCCH, 1 (3, p0) , n PUCCH, 1 (3, p1) ] 10 third PUCCH resources, [n PUCCH, 2 (3, p0) , n PUCCH, 2 (3, p1) ] 11 fourth PUCCH resources, [n PUCCH, 3 (3, p0) , n PUCCH, 3 (3, p1) ].