Method and apparatus for transmitting 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 downlink control information (DCI) in a wireless access system supporting a carrier aggregation scheme, the method comprising:
configuring, by a base station (BS), the DCI comprising a carrier indicator field (CIF) indicating any one of a plurality of carriers which are assigned to a user equipment (UE) and scheduling information for the carrier indicated by the CIF;
transmitting, by the BS to the UE, a physical downlink control channel (PDCCH) signal including the DCI; and
transmitting, by the BS to the UE, downlink data on the carrier indicated by the CIF through a physical downlink shared channel (PDSCH) based on the scheduling information, wherein a location of the CIF is fixed in a front part of a payload of the DCI and wherein the CIF is fixed in size to a number of bits needed to identify each of a plurality of component carriers in the carrier aggregation scheme.
2. The method of claim 1 , wherein the location of the CIF is fixed regardless of DCI format.
3. The method of claim 1 , wherein the size of the CIF is fixed at 3 bits.
4. A method of receiving downlink control information (DCI) in a wireless access system supporting a carrier aggregation scheme, the method comprising:
performing blind decoding to detect a physical downlink control channel (PDCCH);
receiving, by a user equipment (UE), a PDCCH signal including the DCI comprising a carrier indicator field (CIF) indicating any one of a plurality of carriers which are assigned to the UE and scheduling information for the carrier indicated by the CIF; and
receiving downlink data on the carrier indicated by the CIF through a physical downlink shared channel (PDSCH) according to the scheduling information, wherein a location of the CIF is fixed in a front part of a payload of the DCI and wherein the CIF is fixed in size to a number of bits needed to identify each of a plurality of component carriers in the carrier aggregation scheme.
5. The method of claim 4 , wherein the location of the CIF is fixed regardless of DCI format.
6. The method of claim 4 , wherein the size of the CIF is fixed at 3 bits.
7. A base station for transmitting downlink control information DCI in a wireless access system supporting a carrier aggregation scheme, the base station comprising:
a transmitting module configured to transmit a radio signal;
a receiving module configured to receive a radio signal; and
a processor configured to control a transmission of the DCI by controlling the transmitting module and the receiving module,
wherein the processor is configured to:
configure the DCI comprising a carrier indicator field (CIF) indicating any one of a plurality of carriers which are assigned to a user equipment (UE) and scheduling information for the carrier indicated by the CIF;
transmit, to the UE, a physical downlink control channel (PDCCH) signal including the DCI; and
transmit, to the UE, downlink data on the carrier indicated by the CIF through a physical downlink shared channel (PDSCH) based on the scheduling information, wherein a location of the CIF is fixed in a front part of a payload of the DCI and wherein the CIF is fixed in size to a number of bits a number of bits needed to identify each of a plurality of component carriers in the carrier aggregation scheme.
8. The base station of claim 7 , wherein the location of the CIF is fixed regardless of DCI format.
9. The base station of claim 7 , wherein the size of the CIF is fixed at 3 bits.
10. A user equipment (UE) for receiving downlink control information (DCI) in a wireless access system supporting a carrier aggregation scheme, the UE comprising:
a transmitting module configured to transmit a radio signal;
a receiving module configured to receive a radio signal; and
a processor configured to control a reception of DCI by controlling the transmitting module and the receiving module,
wherein the processor is configured to:
perform blind decoding to detect a physical downlink control channel (PDCCH);
receive a PDCCH signal including the DCI comprising a carrier indicator field (CIF) indicating any one of a plurality of carriers which are assigned to the UE and scheduling information for the carrier indicated by the CIF; and
receive downlink data on the at least one carrier indicated by the CIF through a physical downlink shared channel (PDSCH) according to the scheduling information, wherein a location of the CIF is fixed in a front part of a payload of the DCI and wherein the CIF is fixed in size to a number of bits needed to identify each of a plurality of component carriers of the carrier aggregation scheme.
11. The user equipment of claim 10 , wherein the location of the CIF is fixed regardless of DCI format.
12. The user equipment of claim 10 , wherein the size of the CIF is fixed at 3 bits.
13. The user equipment of claim 10 , wherein the size of the CIF is fixed regardless of DCI format.
14. The method of claim 1 , wherein the size of the CIF is fixed regardless of DCI format.
15. The method of claim 4 , wherein the size of the CIF is fixed regardless of DCI format.
16. The base station of claim 7 , wherein the size of the CIF is fixed regardless of DCI format.