V2X transmission resource selecting method implemented by terminal in wireless communication system and terminal using same
The present invention provides a V2X operation method implemented by a V2X (vehicle-to-X) terminal in a wireless communication system, the method characterized by: receiving information which indicates that another communication is implemented on V2X resources; and transmitting a V2X message on the basis of the information, wherein a V2X terminal is a terminal having limited capability to detect the implementation of the other communication on the V2X resources.
1. A method performed by a first user equipment (UE) capable of performing a first communication in a wireless communication system, the method comprising:
establishing a radio resource control (RRC) connection between an RRC layer of the first UE and an RRC layer of a base station;
receiving first information related to a first resource pool for the first communication;
identifying at least one window for resource selection;
performing sensing operation based on the at least one window in the first resource pool;
receiving second information related to resources for transmitting a vehicle to everything (V2X) message;
stopping the first communication on the first resource pool based on the second information;
generating an orthogonal frequency division multiplexing (OFDM) signal including the V2X message; and
transmitting the OFDM signal including V2X message on a second resource pool based on the second information,
wherein the second information includes information related to a location of a second UE and informs that the second UE detects a second communication on the first resource pool, the second communication being different from the first communication and is undetectable by the first UE,
wherein the second information is originated from the second UE,
wherein the first UE is incapable of detecting the implementation of the second communication on the first resource pool while performing the first communication,
wherein the second communication is based on a radio access technology or a numerology that is different than the first communication, and
wherein at least one window comprises at least one of a sensing window and a selection window.
2. The method of claim 1 , wherein the first UE incapable of detecting the implementation of the second communication is a UE having a limited sensing capability, a UE having no sensing capability, or a UE having no reception chain dedicated to the first resource pool.
3. The method of claim 1 , wherein the first UE incapable of detecting the implementation of the second communication is a Pedestrian User Equipment (P-UE).
4. The method of claim 1 , wherein the second information is received from the second UE or the base station.
5. The method of claim 1 , wherein the second information comprises information indicating a type of a sidelink service which is performed on the first resource pool.
6. The method of claim 1 , wherein the second information comprises information indicating whether or not a service being performed on the first resource pool is a public safety (PS) service.
7. The method of claim 1 , wherein the second information comprises information indicating whether or not communication based on a radio access technology (RAT) different from a RAT of V2X communication is detected on the first resource pool.
8. The method of claim 1 , wherein transmitting the V2X message on the second resource pool comprises:
transmitting the V2X message on the second resource pool for a preset period of time.
9. The method of claim 1 , wherein the second resource pool is a subframe other than a subframe used by the first UE in a previously transmitted Transport Block (TB).
10. The method of claim 1 , wherein the first resource pool comprises a V2X resource pool, a V2X carrier, a V2X channel, or a V2X band.
11. The method of claim 1 , wherein the second communication is detected by multiple UEs including the second UE, and
the multiple UEs are located in a pre-defined distance.
12. The method of claim 1 , wherein the first UE is controlled to wake-up according to a pre-defined period to receive the second information.
13. The method of claim 1 , wherein the second information further informs whether the first communication is stopped or is allowed on a different resource pool.
14. The method of claim 1 , further comprising:
after receiving the second information, perform a sensing operation on the second resource pool; and
selecting a resource for transmitting the V2X message among resources where the sensing operation is performed.
15. The method of claim 14 , wherein the resource for transmitting the V2X message on the second resource pool is selected based on at least one parameter related to a resource selection that is same as the first resource pool.
16. The method of claim 1 , further comprising:
receiving a message informs whether a sensing operation is required to select a resource in the second resource pool or a random selection of a resource is allowed in the second resource pool;
selecting a resource for transmitting the V2X message among resources based on the sensing operation, in case that the sensing operation is required; and
selecting the resource for transmitting the V2X message among resources based on the random selection, in case that the random selection is allowed.
17. A first user equipment (UE) capable of performing a first communication in a wireless communication system, the first UE comprising:
a transceiver; and
a processor coupled to the transceiver and configured to control the UE to perform operations comprising:
establishing a radio resource control (RRC) connection between an RRC layer of the first UE and an RRC layer of a base station;
receiving first information related to a first resource pool for the first communication;
identifying at least one window for resource selection;
performing sensing operation based on the at least one window in the first resource pool;
receiving second information related to resources for transmitting a V2X message;
stop the first communication on the first resource pool based on the second information;
generating an orthogonal frequency division multiplexing (OFDM) signal including the V2X message; and
transmitting the OFDM signal including the V2X message on a second resource pool based on the second information,
wherein the second information includes information related to a location of a second UE and informs that the second UE detects a second communication on the first resource pool, the second communication being different from the first communication and is undetectable by the first UE,
wherein the first UE is incapable of detecting the implementation of the second communication on the first resource pool while performing the first communication, and
wherein the second communication is based on a radio access technology or a numerology that is different than the first communication, and
wherein at least one window comprises at least one of a sensing window and a selection window.