Method and and receiving control signal for merging carriers in transmission
Embodiments of the present invention are directed to a method and apparatus for transmitting and receiving a control signal (for example, PDCCH signal) in an asymmetric multicarrier environment. The method for transmitting a control signal for an asymmetric multicarrier in a wireless connection system according to one embodiment of the present invention comprises: determining the size of a carrier indicator field (CIF) indicating a downlink component carrier (DL CC) by which downlink data is transmitted, on the basis of a maximum value of the number of DL CCs and of the number of uplink component carriers (UL CCs) being managed in a base station; transmitting the CIF on a 1 st DL CC to a terminal through a physical downlink control channel (PDCCH); and transmitting downlink data on a 2 nd DL CC indicated by the CIF to the terminal through a physical downlink shared channel (PDSCH).
1. A method of transmitting a signal by a user equipment (UE) configured with a plurality of carriers, the method comprising:
receiving, through a first carrier among the plurality of carriers, downlink control information (DCI) including carrier indication information;
transmitting a physical uplink shared channel (PUSCH) signal to a base station through a second carrier indicated by the carrier indication information;
receiving, in response to the PUSCH signal, hybrid automatic repeat request (HARQ) information for the PUSCH signal only through the first carrier other than the second carrier; and
retransmitting the PUSCH signal based on the HARQ information being configured to indicate the retransmission of the PUSCH signal,
wherein a size of carrier indication information of the DCI is a number of bits based on a number of component carriers capable of performing carrier aggregation.
2. The method of claim 1 , wherein the DCI for the second carrier is not received through the second carrier.
3. The method of claim 1 , wherein a position of the carrier indication information is fixed within the DCI regardless of a DCI format of the DCI.
4. The method of claim 1 , wherein the DCI begins with the carrier indication information.
5. The method of claim 1 , wherein a size of carrier indication information of the DCI satisfies ┌log 2 M┐-bit, where ‘M’ denotes a maximum number of carriers for carrier aggregation, ‘┌ ┐’ denotes a ceiling function.
6. A non-transitory computer readable medium recorded thereon a program code for executing the method of claim 1 .
7. A user equipment (UE) configured with a plurality of carriers, the UE comprising:
a transceiver; and
a processor configured to control the transceiver to:
receive, through a first carrier among the plurality of carriers, downlink control information (DCI) including carrier indication information;
transmit a physical uplink shared channel (PUSCH) signal to a base station through a second carrier indicated by the carrier indication information;
receive, in response to the PUSCH signal, hybrid automatic repeat request (HARQ) information for the PUSCH signal only through the first carrier other than the second carrier; and
retransmit the PUSCH signal based on the HARQ information being configured to indicate the retransmission of the PUSCH signal,
wherein a size of carrier indication information of the DCI is a number of bits based on a number of component carriers capable of performing carrier aggregation.
8. A method of receiving a signal by a base station (BS) operating a plurality of carriers, the method comprising:
transmitting, to a user equipment (UE) through a first carrier among the plurality of carriers, downlink control information (DCI) including carrier indication information;
receiving, from the UE through the second carrier indicated by the carrier indication information, a physical uplink shared channel (PUSCH) signal;
transmitting, in response to the PUSCH signal, hybrid automatic repeat request (HARQ) information for the PUSCH signal only through the first carrier other than the second carrier; and
receiving a retransmission of the PUSCH signal based on the HARQ information being configured to indicate the retransmission of the PUSCH signal,
wherein a size of carrier indication information of the DCI is a number of bits based on a number of component carriers capable of performing carrier aggregation.
9. The method of claim 8 , wherein the DCI is not transmitted through the second carrier.
10. The method of claim 8 , wherein a position of the carrier indication information is fixed within the DCI regardless of a DCI format of the DCI.
11. The method of claim 8 , wherein the DCI begins with the carrier indication information.
12. The method of claim 8 , wherein a size of carrier indication information of the UL grant-DCI satisfies ┌log 2 M┐-bit, where ‘M’ denotes a maximum number of carriers for carrier aggregation, ‘┌ ┐’ denotes a ceiling function.
13. The method of claim 8 , further comprising:
receiving, through the second carrier, the PUSCH signal that is retransmitted by the UE based on the HARQ information.
14. A base station (BS) operating a plurality of carriers, the BS comprising:
a transceiver; and
a processor configured to control the transceiver to:
transmit, to a user equipment (UE) through a first carrier among the plurality of carriers, downlink control information (DCI) including carrier indication information;
receive, from the UE through the second carrier indicated by the carrier indication information, a physical uplink shared channel (PUSCH) signal;
transmit, in response to the PUSCH signal, hybrid automatic repeat request (HARQ) information for the PUSCH signal only through the first carrier other than the second carrier; and
receive a retransmission of the PUSCH signal based on the HARQ information being configured to indicate the retransmission of the PUSCH signal,
wherein a size of carrier indication information of the DCI is a number of bits based on a number of component carriers capable of performing carrier aggregation.