Method and apparatus for performing V2X communication in a wireless communication system
Provided are a method and apparatus for performing vehicle-to-everything (V2X) communication in a wireless communication system, and an operation method of a first terminal in a wireless communication system includes: receiving, from a second terminal, a PC5 radio resource control (RRC) reconfiguration message including configuration information for measurement of sidelink reference signal received power (SL-RSRP); measuring the SL-RSRP, based on the configuration information for measuring the SL-RSRP; and when a reporting type regarding the measurement of the SL-RSRP is periodic reporting and a measurement value of a Layer 3 filtered SL-RSRP is present, transmitting the measurement value of the Layer 3 filtered SL-RSRP to the second terminal.
1. An operation method of a first terminal in a wireless communication system, the operation method comprising:
receiving, from a second terminal, a radio resource control (RRC) reconfiguration message including configuration information associated with measurement of sidelink reference signal received power (SL-RSRP), wherein the configuration information associated with the measurement of the SL-RSRP includes information for a timer related to a periodic reporting regarding the measurement of the SL-RSRP;
performing measurement of a Layer 3 filtered SL-RSRP, based on the configuration information associated with the measurement of the SL-RSRP; and
transmitting, to the second terminal, the measurement result of the Layer 3 filtered SL-RSRP.
2. The operation method of claim 1 , wherein performing measurement of the Layer 3 filtered SL-RSRP includes performing Layer 3 filtering on a measurement result of the SL-RSRP, based on a filtering coefficient related to the measurement of the SL-RSRP, wherein the filtering coefficient is included in the configuration information associated with the measurement of the SL-RSRP.
3. The operation method of claim 1 , wherein the configuration information associated with the measurement of the SL-RSRP is configured for PC5 RRC connection between the first terminal and the second terminal, wherein the first terminal communicates with the second terminal for unicast.
4. The operation method of claim 1 , wherein
the operation method further comprises starting the timer for the periodic reporting regarding the measurement of the SL-RSRP, based on the information about the value of the timer.
5. The operation method of claim 4 , further comprising, in case that the timer for the periodic reporting regarding the measurement of the SL-RSRP expires, transmitting, to the second terminal the measurement result of the Layer 3 filtered SL-RSRP.
6. The operation method of claim 4 , wherein the transmitting of the measurement result of the Layer 3 filtered SL-RSRP to the second terminal comprises, regardless of whether the timer for the periodic reporting regarding the measurement of the SL-RSRP has expired, transmitting the measurement result of the Layer 3 filtered SL-RSRP to the second terminal.
7. The operation method of claim 1 , wherein the transmitting of the measurement result of the Layer 3 filtered SL-RSRP to the second terminal comprises, when the measurement result of the Layer 3 filtered SL-RSRP is greater than a threshold value, transmitting the measurement result of the Layer 3 filtered SL-RSRP to the second terminal.
8. The operation method of claim 1 , wherein the transmitting of the measurement result of the Layer 3 filtered SL-RSRP to the second terminal comprises, when the measurement result of the Layer 3 filtered SL-RSRP is less than a threshold value, transmitting the measurement result of the Layer 3 filtered SL-RSRP to the second terminal.
9. An operation method of a second terminal in a wireless communication system, the operation method comprising:
receiving, from a base station, a radio resource control (RRC) reconfiguration message including configuration information associated with measurement of sidelink reference signal received power (SL-RSRP), wherein the configuration information associated with the measurement of the SL-RSRP includes information for a timer related to a periodic reporting regarding the measurement of the SL-RSRP;
transmitting, to a first terminal, a RRC reconfiguration message including the configuration information associated with the measurement of the SL-RSRP, based on the RRC reconfiguration message received from the base station, wherein the SL-RSRP is measured by the first terminal based on the configuration information associated with the measurement of the SL-RSRP; and
receiving a measurement result of a Layer 3 filtered SL-RSRP from the first terminal,
wherein the measurement result of the Layer 3 filtered SL-RSRP is received from the first terminal in case that the measurement of the Layer 3 filtered SL-RSRP is performed by the first terminal.
10. The operation method of claim 9 , wherein the configuration information associated with the measurement of the SL-RSRP is configured for PC5 RRC connection between the first terminal and the second terminal, wherein the first terminal communicates with the second terminal for unicast.
11. The operation method of claim 9 , wherein the timer for the periodic reporting regarding the measurement of the SL-RSRP starts based on the information about the value of the timer.
12. The operation method of claim 11 , wherein, in case that the timer for the periodic reporting regarding the measurement of the SL-RSRP expires, the measurement result of the Layer 3 filtered SL-RSRP is received from the first terminal.
13. The operation method of claim 11 , wherein, regardless of whether the timer for the periodic reporting regarding the measurement of the SL-RSRP has expired, the measurement result of the Layer 3 filtered SL-RSRP is received from the first terminal.
14. A first terminal in a wireless communication system, the first terminal comprising:
a transceiver; and
at least one processor configured to:
receive, from a second terminal through the transceiver, a radio resource control (RRC) reconfiguration message including configuration information associated with measurement of sidelink reference signal received power (SL-RSRP), wherein the configuration information associated with the measurement of the SL-RSRP includes information for a timer related to a periodic reporting regarding the measurement of the SL-RSRP;
perform measurement of a Layer 3 filtered SL-RSRP, based on the configuration information associated with the measurement of the SL-RSRP; and
transmit, to the second terminal through the transceiver, the measurement result of the Layer 3 filtered SL-RSRP.
15. A second terminal in a wireless communication system, the second terminal comprising:
a transceiver; and
at least one processor configured to:
receive, from a base station through the transceiver, a radio resource control (RRC) reconfiguration message including configuration information associated with measurement of sidelink reference signal received power (SL-RSRP), wherein the configuration information associated with the measurement of the SL-RSRP includes information for a timer related to a periodic reporting regarding the measurement of the SL-RSRP;
transmit, to a first terminal through the transceiver, a RRC reconfiguration message including the configuration information associated with the measurement of the SL-RSRP, based on the RRC reconfiguration message received from the base station, wherein the SL-RSRP is measured by the first terminal based on the configuration information associated with the measurement of the SL-RSRP; and
receive, from the first terminal through the transceiver, a measurement result of a Layer 3 filtered SL-RSRP,
wherein the measurement result of the Layer 3 filtered SL-RSRP is received from the first terminal in case that the measurement of the Layer 3 filtered SL-RSRP is performed by the first terminal.