Method and apparatus for receiving wake-up signal in wireless communication system
One embodiment of the present invention provides a method for receiving a wake-up signal by a first UE in a wireless communication system, the method comprising the steps of: operating a wake-up receiver during a wake-up signal on-duration by the first UE; and receiving a wake-up signal transmitted by a second UE through the wake-up receiver and then receiving data, wherein information related to the wake-up signal on-duration is commonly signaled to the first UE, which receives the wake-up signal, and the second UE which transmits the wake-up signal. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, the BS or a network.
1. A method of receiving a wake-up signal by a first user equipment (UE) in a wireless communication system, the method comprising:
operating, by the first UE, a wake-up receiver during a wake-up signal ON duration; and
receiving data after receiving the wake-up signal transmitted from a second UE through the wake-up receiver,
wherein information related to the wake-up signal ON duration is signaled to both the first UE receiving the wake-up signal and the second UE transmitting the wake-up signal,
wherein based on a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH) being frequency division multiplexed (FDM) and then transmitted, the wake-up signal is transmitted in a last symbol in a region in which the PSCCH is transmitted.
2. The method of claim 1 , wherein the information related to the wake-up signal ON duration includes at least one of a period, an ON duration length, a subframe offset, and a frequency resource location.
3. The method of claim 2 , wherein the wake-up signal ON duration overlaps with an ON duration of a discontinuous reception (DRX) cycle.
4. The method of claim 1 , wherein the first UE is a pedestrian UE (P-UE), and wherein the second UE corresponds to one of a vehicle UE (V-UE), a road side unit (RSU), and an evolved node B (eNB).
5. The method of claim 1 , wherein the wake-up signal is for a discovery signal.
6. The method of claim 5 , wherein when a discovery resource pool for transmitting the discovery signal starts at an n-th subframe, the wake-up signal is transmitted in an (n−k)-th subframe.
7. The method of claim 5 , wherein when a synchronization signal is transmitted in a first subframe of a discovery resource pool for transmitting the discovery signal, the wake-up signal is transmitted in a last symbol of the first subframe.
8. The method of claim 5 , wherein in the case of discovery where a message informing the first UE of the presence of another UE is transmitted, the wake-up signal is transmitted in a last symbol of a subframe in which a synchronization signal is transmitted, and wherein in the case of discovery where a message for searching for another UE is transmitted, the wake-up signal is transmitted in a frequency region in which the first UE receives a signal.
9. The method of claim 1 , wherein the wake-up signal is for a communication signal.
10. The method of claim 9 , wherein the wake-up signal is transmitted on a last synchronization signal transmission resource before a physical sidelink control channel (PSCCH) resource pool.
11. The method of claim 9 , wherein a resource for transmitting the wake-up signal is changed according to a discontinuous reception (DRX) cycle.
12. A first user equipment (UE) for receiving a wake-up signal in a wireless communication system, the first UE comprising:
a transmitter;
a receiver; and
a processor,
wherein the processor is configured to operate a wake-up receiver during a wake-up signal ON duration and receive data after receiving a wake-up signal transmitted from a second UE through the wake-up receiver, and
wherein information related to the wake-up signal ON duration is signaled to both the first UE receiving the wake-up signal and the second UE transmitting the wake-up signal,
wherein based on a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH) being frequency division multiplexed (FDM) and then transmitted, the wake-up signal is transmitted in a last symbol in a region in which the PSCCH is transmitted.
13. The UE of claim 12 , wherein the UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, the BS or a network.