Method for UE transmitting sidelink signal in wireless communication system supporting sidelink, and device therefor
Disclosed, according to various embodiments, are a method for a UE transmitting a sidelink signal in a wireless communication system supporting a sidelink, and a device therefor. Disclosed is a method for transmitting a sidelink signal and a device therefor, the method comprising the steps of: measuring state information including mobility information; receiving a first sidelink signal including control information; and determining whether to transmit a second sidelink signal, wherein, on the basis of the control information, including information on a cluster area, and the state information, including information on a location included in the cluster area, a UE monitors the receiving or not of a third sidelink signal transmitted by other UEs during a predetermined duration, and whether to transmit the second sidelink signal is determined on the basis of the result of the monitoring.
1. A method of transmitting a signal by a user equipment (UE) in a wireless communication system, the method comprising:
measuring status information including mobility information and a location of the UE;
receiving a first signal including control information including information about a cluster area;
based on the location of the UE being located in the cluster area, monitoring whether a third signal of another UE is received within a predetermined period; and
determining whether to transmit a second signal as a representative UE of the cluster area based on the monitoring result, and
wherein the second signal includes collision avoidance guide information requesting a change of a movement angle and a movement speed.
2. The method according to claim 1 , wherein the second signal is transmitted when the third signal is not received during the predetermined period.
3. The method according to claim 1 , wherein when the third signal is received during the predetermined period and the third signal includes information on a geographic area corresponding to the cluster area, the transmission of the second signal is not allowed.
4. The method according to claim 3 , further comprising:
receiving at least one of a personal safety message (PSM), a cooperative awareness message (CAM), a decentralized environmental notification message (DENM), and a threat notification message (TNM); and
calculating a collision risk (CR) value based on the received at least one message and the status information.
5. The method according to claim 4 , wherein when the third signal is received during the predetermined period and the calculated collision risk (CR) value is equal to or greater than a collision risk (CR) value obtained from the third signal, the second signal is transmitted.
6. The method according to claim 4 , wherein when the control information further includes information for a collision risk (CR) reference value and the calculated collision risk value is equal to or greater than the collision risk reference value, the second signal is transmitted regardless of reception or non-reception of the third signal.
7. The method according to claim 4 , wherein when the third signal is received during the predetermined period, and a collision region and time predicted based on the state information and the at least one message correspond to the collision region and time included in the third signal, the transmission of the second signal is not allowed.
8. The method according to claim 1 , wherein when the control information further includes identifier (ID) information for each cluster area and ID information for the cluster area corresponding to the location information included in the status information matches the ID of the UE, the second signal is transmitted regardless of reception or non-reception of the third signal.
9. The method according to claim 1 , wherein the control information further includes instruction information indicating any one of schemes for transmitting a plurality of clustering-based signals.
10. The method according to claim 9 , wherein the second signal includes at least one of a collision risk (CR) value, a geographical area, a collision area, and a collision time, based on the instruction information.
11. The method according to claim 1 , wherein the second signal further includes information about a collision area and a collision time that are estimated by the user equipment (UE).
12. A user equipment (UE) configured to transmit a safety message in a wireless communication system, the user equipment (UE) comprising:
a radio frequency (RF) transceiver; and
a processor connected to the RF transceiver,
wherein the processor is configured to measure status information including mobility information and a location of the UE, receive a first signal including control information including information about a cluster area, monitor whether a third signal of another UE is received during a predetermined period based on the location of the UE being located in the cluster area, and determine whether to transmit the second signal as a representative UE of the cluster area based on the result of monitoring, and
wherein the second signal includes collision avoidance guide information requesting a change of a movement angle and a movement speed.
13. A chip set configured to control a user equipment (UE) transmitting a safety message in a wireless communication system, the chip set comprising:
at least one processor; and
at least one memory operatively connected to the at least one processor, and configured to store instructions such that the at least one processor performs specific operations by executing the instructions,
wherein the specific operations include:
measuring status information including mobility information and a location of the UE;
receiving a first signal including control information including information about a cluster area;
based on the location of the UE being located in the cluster area, monitoring whether a third of another UE is received within a predetermined period; and
determining whether to transmit the second signal as a representative UE of the cluster area based on the result of monitoring,
wherein the second signal includes collision avoidance guide information requesting a change of a movement angle and a movement speed.