Method for transmitting wireless signal and device therefor
The present invention relates to a wireless communication system. Particularly, the present invention relates to a method for receiving control information in a wireless communication system and a device therefor, the method comprising the steps of: receiving a PDCCH signal including uplink scheduling information; transmitting a PUSCH signal by using the uplink scheduling information: and receiving a PHICH signal including acknowledgement information on the PUSCH signal, wherein an RS for the PUSCH signal exists only in one slot per RB pair within an RB set in which the PUSCH signal is transmitted, and a resource for receiving the PHICH signal is determined by using an index of the slot in which the RS exists.
1. A method for receiving control information by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a physical downlink control channel (PDCCH) signal including an uplink scheduling information;
transmitting a physical uplink shared channel (PUSCH) signal based on the uplink scheduling information, through a resource block (RB) set of consecutive RB pairs in a first slot and a second slot; and
receiving a physical hybrid ARQ indicator channel (PHICH) signal including an ACK/NACK (acknowledgement/negative-acknowledgement) for the PUSCH signal,
wherein a reference signal (RS) for the PUSCH signal exists in the first slot of an odd-numbered RB pair and exists in the second slot of an even-numbered RB pair of the RB set, and
wherein a resource index for the PHICH signal is obtained:
based on a lowest index within the RB set, when the RS for the PUSCH signal exists in the first slot of an RB pair of the lowest index within the RB set, and
based on the lowest index within the RB set and an offset, when the RS for the PUSCH signal exists in the second slot of the RB pair of the lowest index within the RB set.
2. The method according to claim 1 , wherein an index of each of the RB pairs is indexed based on all RBs within system bandwidth.
3. The method according to claim 1 , wherein an index of each of the RB pairs is indexed based on RBs of the RB set.
4. A user equipment (UE) configured to receive a control information in a wireless communication system, the UE comprising:
a radio frequency (RF) unit; and
a processor,
wherein the processor is configured to receive a physical downlink control channel (PDCCH) signal including an uplink scheduling information, transmit a physical uplink shared channel (PUSCH) signal based on the uplink scheduling information, through a resource block (RB) set of consecutive RB pairs in a first slot and a second slot, and receive a physical hybrid ARQ indicator channel (PHICH) signal including an ACK/NACK (acknowledgement/negative-acknowledgement) for the PUSCH signal,
wherein a reference signal (RS) for the PUSCH signal exists in the first slot of an odd-numbered RB pair and exists in the second slot of an even-numbered RB pair of the RB set, and
wherein a resource index for the PHICH signal is obtained:
based on a lowest index within the RB set, when the RS for the PUSCH signal exists in the first slot of an RB pair of the lowest index within the RB set, and
based on the lowest index within the RB set and an offset, when the RS for the PUSCH signal exists in the second slot of the RB pair of the lowest index within the RB set.
5. The UE according to claim 4 , wherein an index of each of the RB pairs is indexed based on all RBs within system bandwidth.
6. The UE according to claim 4 , wherein an index of each of the RB pairs is indexed based on RBs of the RB set.