Method and apparatus by which LTE V2X and NR V2X coexist in same frequency band
Provided are a method by which a first apparatus performs wireless communication, and an apparatus supporting same. The method comprises the steps of from among a first resource for which evolved-universal mobile telecommunications system (UMTS) terrestrial radio access (E-UTRA)-based sidelink (SL) communication and NR-based SL communication are allowed and a second resource for which the NR-based SL communication is allowed, determining to perform NR SL communication on the basis of the first resource; and performing the NR SL communication together with a second apparatus on the basis of the first resource, wherein the second resource may be a resource for which the E-UTRA-based SL communication is not allowed.
1 . A method comprising:
obtaining, by a first device, information related to a resource pool;
determining, by the first device, resources included in the resource pool within a time interval; and
selecting, by the first device, a transmission resource based on the resources,
wherein, based on (i) long term evolution (LTE) reference signal received power (RSRP) measurement related to an LTE sidelink (SL) resource being higher than a threshold and (ii) the LTE SL resource which overlaps with a physical sidelink feedback channel (PSFCH) resource related to an NR SL resource, the NR SL resource is not selected as the transmission resource.
2 . The method of claim 1 , wherein the resource pool is configured with the PSFCH resource.
3 . The method of claim 1 , wherein the LTE RSRP measurement is obtained based on physical sidelink shared channel (PSSCH) demodulation reference signal (DMRS).
4 . The method of claim 1 , further comprising:
obtaining first priority information for NR SL transmission; and
receiving, from a second device, sidelink control information including second priority information and resource reservation information related to the LTE SL resource.
5 . The method of claim 4 , wherein the threshold is obtained based on the first priority information and the second priority information.
6 . The method of claim 1 , wherein the threshold related to the LTE RSRP measurement is configured independently of a threshold related to NR RSRP measurement.
7 . The method of claim 1 , wherein the NR SL resource is determined based on a minimum time gap between the NR SL resource and the PSFCH resource.
8 . The method of claim 1 , further comprising:
transmitting, based on the transmission resource, first sidelink control information for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information through a physical sidelink control channel (PSCCH); and
transmitting, based on the transmission resource, the second sidelink control information and data through the PSSCH.
9 . A first device comprising:
at least one transceiver;
at least one processor; and
at least one memory connected to the at least one processor and storing instructions that, based on being executed, cause the first device to perform operations comprising:
obtaining information related to a resource pool;
determining resources included in the resource pool within a time interval; and
selecting a transmission resource based on the resources,
wherein, based on (i) long term evolution (LTE) reference signal received power (RSRP) measurement related to an LTE sidelink (SL) resource being higher than a threshold and (ii) the LTE SL resource which overlaps with a physical sidelink feedback channel (PSFCH) resource related to an NR SL resource, the NR SL resource is not selected as the transmission resource.
10 . The first device of claim 9 , wherein the resource pool is configured with the PSFCH resource.
11 . The first device of claim 9 , wherein the LTE RSRP measurement is obtained based on physical sidelink shared channel (PSSCH) demodulation reference signal (DMRS).
12 . The first device of claim 9 , wherein the operations further comprise: obtaining first priority information for NR SL transmission; and receiving, from a second device, sidelink control information including second priority information and resource reservation information related to the LTE SL resource.
13 . The first device of claim 12 , wherein the threshold is obtained based on the first priority information and the second priority information.
14 . The first device of claim 9 , wherein the threshold related to the LTE RSRP measurement is configured independently of a threshold related to NR RSRP measurement.
15 . A processing device comprising:
at least one processor; and
at least one memory connected to the at least one processor and storing instructions that, based on being executed, cause a first device to perform operations comprising:
obtaining information related to a resource pool;
determining resources included in the resource pool within a time interval; and
selecting a transmission resource based on the resources,
wherein, based on (i) long term evolution (LTE) reference signal received power (RSRP) measurement related to an LTE sidelink (SL) resource being higher than a threshold and (ii) the LTE SL resource which overlaps with a physical sidelink feedback channel (PSFCH) resource related to an NR SL resource, the NR SL resource is not selected as the transmission resource.
16 . The processing device of claim 15 , wherein the resource pool is configured with the PSFCH resource.
17 . The processing device of claim 15 , wherein the LTE RSRP measurement is obtained based on physical sidelink shared channel (PSSCH) demodulation reference signal (DMRS).
18 . The processing device of claim 15 , wherein the operations further comprise: obtaining first priority information for NR SL transmission; and receiving, from a second device, sidelink control information including second priority information and resource reservation information related to the LTE SL resource.
19 . The processing device of claim 18 , wherein the threshold is obtained based on the first priority information and the second priority information.
20 . The processing device of claim 15 , wherein the threshold related to the LTE RSRP measurement is configured independently of a threshold related to NR RSRP measurement.