Method and device for transmitting control information
The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and to an apparatus for the same. The present invention relates to a method and to a device for said method which comprises the steps of selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources, and transmitting a bit value corresponding to the plurality of HARQ-ACKs by using the selected uplink control channel resource.
1. A method for transmitting uplink control information by a communication apparatus configured with a plurality of cells in a wireless communication system, the method comprising:
receiving a RRC (Radio Resource Control) message including a first set of four PUCCH (Physical Uplink Control Channel) resource values and a second set of four PUCCH resource values;
receiving a first PDCCH (Physical Downlink Control Channel) signal on a primary call and a second PDCCH signal on a secondary cell;
receiving first and second PDSCH (Physical Downlink Shared Channel) signals indicated by the first and second PDCCH signals respectively, each of the first and second PDSCH signals having up to 2 transport blocks;
selecting one of four PUCCH resources according to HARQ-ACKs (Hybrid Automatic Repeat request-Acknowledgements) for transport blocks of the first and second PDSCH signals, the four PUCCH resources including:
a first PUCCH resource indicated by a lowest CCE (Control Channel Element) index used for transmission of the first PDCCH signal,
a second PUCCH resource indicated by the lowest CCE index+1, and
a pair of third and fourth PUCCH resources indicated by a 2-bit value of a Acknowledgement/Negative ACK Resource Index (ARI) field of the second PDCCH signal, the 2-bit value of the ARI field being mapped to one of the first set of four PUCCH resource values for the third PUCCH resource and mapped to one of the second set of four PUCCH resource values for the fourth PUCCH resource; and
transmitting a two bit value corresponding to the HARQ ACKs using the selected PUCCH resource.
2. The method according to claim 1 , wherein the primary and secondary cells are MIMO (Multiple Input Multiple Output) cells.
3. A communication apparatus configured to transmit uplink control information when a plurality of cells is configured in a wireless communication system, the communication apparatus comprising:
a radio frequency (RF) unit; and
a processor,
wherein the processor is configured to:
receive a RRC (Radio Resource Control) message including a first set of four PUCCH (Physical Uplink Control Channel) resource values and a second set of four PUCCH resource values,
receive a first PDCCH (Physical Downlink Control Channel) signal on a primary cell and a second PDCCH signal on a secondary cell,
receive first and second a plurality of PDSCH signals indicated by the first and second PDCCH (Physical Downlink Shared Channel) signals respectively, each of the first and second PDSCH signals having up to 2 transport blocks,
select one of four PUCCH resources according to HARQ-ACKs (Hybrid Automatic Repeat request-Acknowledgements) for transport blocks of the first and second PDSCH signals, the four PUCCH resources including:
a first PUCCH resource indicated by a lowest CCE (Control Channel Element) index used for transmission of the PDCCH signal,
a second PUCCH resource indicated by the lowest CCE index+1, and
a pair of third and fourth PUCCH resources indicated by a 2-bit value of a Acknowledgement/Negative ACK Resource Index (ARI) field of the second PDCCH signal, the 2-bit value of the ARI field being mapped to one of the first set of four PUCCH resource values for the third PUCCH resource and mapped to one of the second set of four PUCCH resource values for the fourth PUCCH resource; and
transmit a two bit value corresponding to the HARQ ACKs using the selected PUCCH resource.
4. The communication apparatus according to claim 3 , wherein the primary and secondary cells are MIMO (Multiple Input Multiple Output) cells.