Method for transmitting and receiving signal in wireless communication system supporting device-to-device communication and apparatus therefor
The present invention provides a method for transmitting and receiving a signal for device-to-device (D2D) communication and an apparatus therefor, which are used in a wireless access system supporting D2D communication. A method for a device transmitting and receiving a signal according to one aspect of the present invention may comprise the steps of: identifying signals that are scheduled for a particular subframe configured for D2D transmission and reception; determining whether the scheduled signals overlap; and transmitting the scheduled signals on the basis of a pre-determined priority if the scheduled signals overlap. To this end, the priority may be determined based on the type of signal. More preferably, the priority may be determined in the order of a synchronization signal, a D2D communication signal and a D2D discovery signal.
1. A method for transmitting a signal by a user equipment (UE) in a wireless communication system supporting device-to-device (D2D) communication, the method comprising:
reserving a first uplink resource on a first frequency band for transmission of a first signal;
reserving a second uplink resource on a second frequency band for transmission of a second signal, wherein the second uplink resource is overlapped in time with the first uplink resource; and
when the UE is not capable of simultaneous transmission on the first frequency band and the second frequency band, transmitting the first signal,
wherein each of the first signal and the second signal is a signal to an eNodeB, a D2D synchronization signal, a D2D control signal or other D2D communication signal,
wherein the first signal is determined based on a predetermined priority in an order of the signal to the eNodeB, the D2D synchronization signal, the D2D control signal, and the other D2D communication signal, and wherein, when the second signal is the D2D synchronization signal and symbols of the D2D synchronization signal do not directly overlap symbols for the first signal, the UE also transmits the symbols of the D2D synchronization signal that do not directly overlap symbols for the first signal.
2. The method according to claim 1 , wherein timing of the first resource and the second resource is different from each other.
3. The method according to claim 2 , wherein the first resource has a timing for which a timing advance command is applied, and
wherein the second resource has a timing for which a timing advance command is not applied.
4. The method according to claim 1 , wherein the first uplink resource and the second uplink resource comprise a same subframe with respect to time.
5. A user equipment (UE) for transmitting a signal in a wireless communication system supporting device-to-device (D2D) communication, the UE comprising:
a transceiver configured to transmit the signal; and
a processor configured to support the D2D communication,
wherein the processor is configured to:
reserve a first uplink resource on a first frequency band for transmission of a first signal and to reserve a second uplink resource on a second frequency band for transmission of a second signal, wherein the second uplink resource is overlapped in time with the first uplink resource, and
when the UE is not capable of simultaneous transmission on the first frequency band and the second frequency band, control the transceiver to transmit the first signal,
wherein the first signal and the second signal are a signal to an eNodeB, a D2D synchronization signal, a D2D control signal, or other D2D communication signal,
wherein the first signal is determined based on predetermined priority in an order of the signal to the eNodeB, the D2D synchronization signal, the D2D control signal, and the other D2D communication signal, and wherein, when the second signal is the D2D synchronization signal and symbols of the D2D synchronization signal do not directly overlap symbols for the first signal, the UE also transmits the symbols of the D2D synchronization signal that do not directly overlap symbols for the first signal.
6. The UE of claim 5 , wherein timing of the first resource and the second resource is different from each other.
7. The UE of claim 6 , wherein the first resource has a timing for which timing advance command is applied, and
wherein the second resource has a timing for which a timing advance command is not applied.
8. The UE of claim 5 , wherein the first uplink resource and the second uplink resource comprise a same subframe with respect to time.