Apparatus and method for transmitting/receiving control information in a wireless communication system that supports carrier aggregation
Disclosed are an apparatus and method for transmitting/receiving control information in a wireless communication system that supports carrier aggregation. According to the present invention, a processor of a base station device that transmits control information configures a component carrier type for each of a plurality of downlink component carriers (DL CCs) in accordance with whether or not each of the plurality of DL CCs can support a relay PDCCH (R-PDCCH), which is a downlink control channel dedicated to a relay node. A transmitting antenna transmits information on the type of each of the configured DL Cs to the relay node.
1. A method of receiving control information at a relay node in a wireless communication system supporting carrier aggregation, the method comprising:
receiving type information of a plurality of downlink component carriers configuring types of each of the plurality of downlink component carriers (CCs) based on whether an R-PDCCH (Relay-PDCCH) corresponding to a relay dedicated downlink control channel is supportable, from an eNode B; and
performing a blind searching to detect the R-PDCCH or a physical downlink control channel (PDCCH) based on the type information of the plurality of the downlink component carriers.
2. The method of claim 1 , wherein the performing blinding searching further comprising:
performing the blind searching to detect the R-PDCCH from a first downlink component carrier if the first downlink component carrier among the plurality of the downlink component carriers is the downlink component carrier supportive of the R-PDCCH.
3. The method of claim 2 , further comprising:
receiving data from the eNode B on the first downlink component carrier based on the R-PDCCH detected from the first downlink component carrier.
4. The method of claim 3 , further comprising:
transmitting data to the eNode B on a first uplink component carrier configured in a linkaged relation with the first downlink component carrier based on the R-PDCCH detected from the first downlink component carrier.
5. The method of claim 1 , wherein the performing blinding searching further comprising:
performing the blind searching to detect the R-PDCCH from a first downlink component carrier if the fist downlink component carrier among the plurality of the downlink component carriers is the downlink component carrier non-supportive of the R-PDCCH.
6. The method of claim 5 , further comprising:
receiving data from the eNode B on the first downlink component carrier based on the PDCCH detected from the first downlink component carrier.
7. A relay node apparatus of receiving control information in a wireless communication system supporting carrier aggregation, the relay node apparatus comprising:
a receiving antenna configured to receive, type information of a plurality of downlink component carriers configuring types of the plurality of downlink component carriers (CCs) based on whether an R-PDCCH (Relay-PDCCH) corresponding to a relay dedicated downlink control channel is supportable, from an eNode B; and
a processor configured to perform a blind searching to detect the R-PDCCH or a physical downlink control channel (PDCCH) based on the type information of the plurality of the downlink component carriers.
8. The relay node apparatus of claim 7 , wherein the processor further configured to perform the blind searching to detect the R-PDCCH from a first downlink component carrier if the first downlink component carrier among the plurality of the downlink component carriers is the downlink component carrier supportive of the R-PDCCH.
9. The relay node apparatus of claim 8 , wherein the receiving antenna further configured to receive data from the eNode B on the first downlink component carrier based on the R-PDCCH detected from the first downlink component carrier.
10. The relay node apparatus of claim 9 , further comprising:
a transmitting antenna configured to transmit data to the eNode B on a first uplink component carrier configured in a linkaged relation with the first downlink component carrier based on the R-PDCCH detected from the first downlink component carrier.
11. The relay node apparatus of claim 7 , wherein the processor further configured to performs the blind searching to detect the R-PDCCH from a 1 st downlink component carrier if the first downlink component carrier among the plurality of the downlink component carries is the downlink component non-supportive of the R-PDCCH.
12. The relay node apparatus of claim 11 , wherein the receiving antenna further configured to receive data from the eNode B on the first downlink component carrier based on the PDCCH detected from the first downlink component carrier.