Communication method for cooperative multi-point and wireless device using same
Provided are a communication method for a cooperative multi-point and a wireless device using the same. The wireless device receives, from a first cooperative multi-point (CoMP) cell, a first physical downlink shared channel (PDSCH) in a first subframe of a first frequency band, and receives, from a second CoMP cell, a second PDSCH in a second subframe of a second frequency band. A portion or the entire first frequency band is overlapped with the second frequency band. A first start point at which the first PDSCH in said first subframe starts being scheduled is the same as a second start point at which the second PDSCH in said second subframe starts being scheduled.
1. A communication method for cooperative multi-point (CoMP) in a wireless communication system, the method comprising:
receiving a first physical downlink control channel (PDCCH) including first scheduling information on a first physical downlink shared channel (PDSCH) to be received in a first subframe of a first frequency band from a first CoMP cell;
receiving a second PDCCH including second scheduling information on a second PDSCH to be received in a second subframe of a second frequency band in a second CoMP cell, wherein the first frequency band overlaps partially or entirely with the second frequency band; and
if a first start point at which the first PDSCH in the first subframe starts is to be received is the same as a second start point at which the second PDSCH in the second subframe starts is to be received, selecting the valid one of the first scheduling information and the second scheduling information thereby ignoring the other one of the first scheduling information and the second scheduling information.
2. The method of claim 1 , wherein the first and second subframes include a plurality of orthogonal frequency division multiplexing (OFDM) symbols.
3. The method of claim 2 , wherein the first and second start points correspond to any one of 2nd through 7th OFDM symbols.
4. The method of claim 1 , wherein the first and second start points are indicated by one control format indicator (CFI).
5. The method of claim 4 , wherein the single CFI is received in one of the first and second CoMP cells.
6. The method of claim 5 , wherein the single cell is a primary cell.
7. A wireless device for supporting cooperative multi-point (CoMP) in a wireless communication system, the wireless device comprising:
a radio frequency (RF) unit configured to transmit and receive a radio signal; and
a processor operatively coupled to the RF unit, the processor being configured to:
receive a first physical downlink control channel (PDCCH) including first scheduling information on a first physical downlink shared channel (PDSCH) to be received in a first subframe of a first frequency band from a first CoMP cell,
receive a second PDCC including second scheduling information on a second PDSCH to be received in a second subframe of a second frequency band in a second CoMP cell, wherein the first frequency band overlaps partially or entirely with the second frequency band, and
if a first start point at which the first PDSCH in the first subframe starts is to be received is the same as a second start point at which the second PDSCH in the second subframe starts is to be received, select the valid one of the first scheduling information and the second scheduling information thereby ignoring the other one of the first scheduling information and the second scheduling information.
8. The wireless device of claim 7 , wherein the first and second subframes include a plurality of orthogonal frequency division multiplexing (OFDM) symbols.
9. The wireless device of claim 8 , wherein the first and second start points correspond to any one of 2nd through 7th OFDM.
10. The wireless device of claim 7 , wherein the first and second start points are indicated by one control format indicator (CFI).