Method and device for transmitting/obtaining control information in wireless communication system
An embodiment of the present invention relates to a method of obtaining control information through an enhanced physical downlink control channel (E-PDCCH) by a terminal in a wireless communication system. The method includes performing blind decoding on a common searching space in a set of first resource blocks on a subframe; and performing blind decoding on a terminal-specific searching space in a set of second resource blocks on the subframe, wherein a first start orthogonal frequency division multiplexing (OFDM) symbol of an E-PDCCH resource region including the common searching space in the set of first resource blocks and a second start OFDM symbol of an E-PDCCH resource region including the terminal-specific searching space in the set of second resource blocks are set individually.
1. A method for acquiring control information via an Enhanced Physical Downlink Control Channel (EPDCCH) at a User Equipment (UE) in a wireless communication system, the method comprising:
determining an index of a start Orthogonal Frequency Division Multiplexing (OFDM) symbol of an EPDCCH in a subframe; and
attempting to perform decoding on a UE-specific search space of the EPDCCH,
wherein if the subframe is a subframe 1 or a subframe 6 for Time Division Duplexing (TDD), the index of the starting OFDM symbol is a smaller value between 2 and a higher-layer parameter which indicates the index of the starting OFDM symbol of the EPDCCH.
2. The method according to claim 1 , wherein if the subframe is a Multicast-Broadcast Single Frequency Network (MBSFN) subframe, the index of the starting OFDM symbol is a smaller value between 2 and the higher-layer parameter.
3. The method according to claim 2 , wherein the subframe is configured with one or two antenna ports.
4. The method according to claim 2 , wherein if the subframe is a non-MBSFN subframe, the index of the starting OFDM symbol is the higher-layer parameter.
5. The method according to claim 1 wherein if the subframe is a subframe other than the subframe 1 and the subframe 6, the index of the starting OFDM symbol is the higher-layer parameter.
6. A method for transmitting control information on an Enhanced Physical Downlink Control Channel (EPDCCH) at a Base Station (BS) in a wireless communication system, the method comprising:
determining an index of a start Orthogonal Frequency Division Multiplexing (OFDM) symbol of an EPDCCH in a subframe; and
allocating the EPDCCH to a UE-specific search space of the EPDCCH,
wherein if the subframe is a subframe 1 or a subframe 6 for Time Division Duplexing (TDD), the index of the starting OFDM symbol is a smaller value between 2 and a higher-layer parameter which indicates the index of the starting OFDM symbol of the EPDCCH.
7. The method according to claim 6 , wherein if the subframe is a Multicast-Broadcast Single Frequency Network (MBSFN) subframe, the index of the starting OFDM symbol is a smaller value between 2 and the higher-layer parameter.
8. The method according to claim 7 , wherein the subframe is configured with one or two antenna ports.
9. The method according to claim 7 , wherein if the subframe is a non-MBSFN subframe, the index of the starting OFDM symbol is the higher-layer parameter.
10. The method according to claim 6 , wherein if the subframe is a subframe other than the subframe 1 and the subframe 6, the index of the starting OFDM symbol is the higher-layer parameter.
11. A User Equipment (UE) for acquiring control information on an Enhanced Physical Downlink Control Channel (EPDCCH) in a wireless communication system, the UE comprising:
a reception module; and
a processor,
wherein the processor determines an index of a start Orthogonal Frequency Division Multiplexing (OFDM) symbol of an EPDCCH in a subframe and attempts to perform decoding on a UE-specific search space of the EPDCCH, wherein if the subframe is a subframe 1 or a subframe 6 for Time Division Duplexing (TDD), the index of the starting OFDM symbol is a smaller value between 2 and a higher-layer parameter which indicates the index of the starting OFDM symbol of the EPDCCH.
12. A Base Station (BS) for transmitting control information on an Enhanced Physical Downlink Control Channel (EPDCCH) in a wireless communication system, the BS comprising:
a transmission module; and
a processor,
wherein the processor determines an index of a start Orthogonal Frequency Division Multiplexing (OFDM) symbol of an EPDCCH in a subframe and allocates the EPDCCH to a UE-specific search space of the EPDCCH, wherein if the subframe is a subframe 1 or a subframe 6 for Time Division Duplexing (TDD), the index of the starting OFDM symbol is a smaller value between 2 and a higher-layer parameter which indicates the index of the starting OFDM symbol of the EPDCCH.