Method and device for setting a control channel and a data channel in a wireless communication system
The present invention relates to a method for configuring a starting position of a control channel in a wireless communication system, and a terminal using the same. The method includes receiving duration information about a physical downlink control channel from the first orthogonal frequency division multiplexing (OFDM) symbol of a downlink subframe; and configuring a first OFDM symbol after OFDM symbols indicated by the duration information, as a starting point of an enhanced-physical downlink control channel. The downlink subframe includes a plurality of subcarriers in a frequency domain and 12 or 14 OFDM symbols in a time domain. The PDCCH includes the first N (N is a natural number of from 1 to 4) number of OFDM symbols of the downlink subframe. The duration information indicates the N number of OFDM symbols. The E-PDCCH comprises the starting point to the last OFDM symbol of the downlink subframe.
1. A method for receiving a data channel in a carrier aggregation system, the method performed by a user equipment (UE) which is configured with a plurality of serving cells and comprising:
receiving position information informing of a starting orthogonal frequency division multiplexing (OFDM) symbol for an Enhanced Physical Downlink Control CHannel (EPDCCH) through a Radio Resource Control (RRC) message;
receiving the EPDCCH; and
receiving a physical downlink shared channel (PDSCH) assigned by the EPDCCH,
wherein, if the EPDCCH and the PDSCH are received in a same serving cell, a starting OFDM symbol for the PDSCH is given by the position information.
2. The method of claim 1 , wherein the EPDCCH and the PDSCH are received in a same subframe.
3. The method of claim 2 , wherein the subframe comprises 12 OFDM symbols or 14 OFDM symbols.
4. The method of claim 1 , wherein if the position information is not configured to the UE, the starting OFDM symbol for the EPDCCH is determined as an OFDM symbol next to a Physical Downlink Control Channel (PDCCH) region checked through a Physical Control Format Indicator Channel (PCFICH).
5. The method of claim 1 , wherein if the EPDCCH and the PDSCH are received in different serving cells, the starting OFDM symbol for the PDSCH is set by information other than the received position information.
6. A User Equipment (UE), the UE comprising:
a transceiver transmitting and receiving radio signals; and
a processor connected to the transceiver,
wherein the processor is configured to:
receive position information informing of a starting orthogonal frequency division multiplexing (OFDM) symbol for an Enhanced Physical Downlink Control CHannel (EPDCCH) through a Radio Resource Control (RRC) message,
receive the EPDCCH based on the position information, and
receive a physical downlink shared channel (PDSCH) assigned by the EPDCCH,
wherein, if the EPDCCH and the PDSCH are received in a same serving cell, a starting OFDM symbol for the PDSCH is given by the position information.
7. The UE of claim 6 , wherein the EPDCCH and the PDSCH are received in a same subframe.
8. The method of claim 7 , wherein the subframe comprises 12 OFDM symbols or 14 OFDM symbols.
9. The method of claim 6 , wherein if the position information is not configured to the UE, the starting OFDM symbol for the EPDCCH is determined as an OFDM symbol next to a Physical Downlink Control Channel (PDCCH) region checked through a Physical Control Format Indicator Channel (PCFICH).
10. The UE of claim 6 , wherein if the EPDCCH and the PDSCH are received in different serving cells, the starting OFDM symbol for the PDSCH is set by information other than the received position information.