Method for resolving resource collision in V2X communication environment and mobile device therefor
A method for resolving, by a mobile device, resource collision in a V2X communication environment may comprise the steps of: determining whether resource collision has occurred in a specific resource selected by a plurality of adjacent mobile devices; and, if it is determined that resource collision has occurred, transmitting information on the result of the determination to the plurality of adjacent mobile devices.
1. A method for resolving, by a mobile device, a resource collision in a Vehicle-to-everything (V2X) communication environment, the method comprising:
determining whether the resource collision has occurred in a specific resource selected by a plurality of neighbor mobile devices; and
when it is determined the resource collision has occurred, transmitting information on a result of the determining to the plurality of neighbor mobile devices,
wherein the determining comprises determining that the resource collision has occurred when a reference signals received power (RSRP) value in the specific resource is higher than a predefined first threshold value but a signal-to-interference-plus-noise ratio (SINR) value is lower than a predefined second threshold value.
2. The method according to claim 1 , further comprising:
estimating the SINR value based on the RSRP value and a received signal strength indicator (RSSI) value in the specific resource.
3. The method according to claim 1 , wherein the information on the result of the determining includes at least one of information indicating the specific resource or identifier information on the plurality of neighbor mobile devices.
4. The method according to claim 1 , wherein the selected specific resource is randomly selected by the plurality of neighbor mobile devices.
5. The method according to claim 1 , wherein the mobile device and the plurality of neighbor mobile devices belong to a same group based on geographical information.
6. The method according to claim 1 , further comprising:
transmitting scheduling assignment (SA) or data in a resource corresponding to a time different from the specific resource in a time domain.
7. A mobile device for resolving a resource collision in a Vehicle-to-everything (V2X) communication environment, the mobile device comprising:
a processor configured to determine whether the resource collision has occurred in a specific resource selected by a plurality of neighbor mobile devices; and
a transmitter configured to, when it is determined that the resource collision has occurred, transmit information on a result of the determining to the plurality of neighbor mobile devices,
wherein the processor is further configured to determine that the resource collision has occurred when a reference signals received power (RSRP) value in the specific resource is higher than a predefined first threshold value but a signal-to-interference-plus-noise ratio (SINR) value is lower than a predefined second threshold value.
8. The mobile device according to claim 7 , wherein the processor is further configured to estimate the SINR value based on the RSRP value and a received signal strength indicator (RSSI) value in the specific resource.
9. The mobile device according to claim 7 , wherein the information on the result of the determining includes at least one of information indicating the specific resource or identifier information on the plurality of neighbor mobile devices.
10. The mobile device according to claim 7 , wherein the selected specific resource is randomly selected by the plurality of neighbor mobile devices.
11. The mobile device according to claim 7 , wherein the mobile device and the plurality of neighbor mobile devices belong to a same group based on geographical information.
12. The mobile device according to claim 7 , wherein the transmitter is further configured to transmit scheduling assignment (SA) or data in a resource corresponding to a time different from the specific resource in a time domain.