Method and apparatus for performing congestion control in NR V2X
Provided are a method for performing sidelink communication by means of a first device ( 100 ), and an apparatus supporting same. The method comprises the steps of: performing channel occupancy ratio (CR) measurement on the basis of the number of transmission layers; and performing sidelink communication on the basis of the measurement.
1. A method for performing, by a first device ( 100 ), sidelink communication, the method comprising:
performing a channel occupancy ratio (CR) measurement based on a number of transport layers; and
performing the sidelink communication based on the CR measurement,
wherein the CR measurement is performed by determining a first CR value, and adjusting the first CR value to a second CR value based on the number of transport layers.
2. The method of claim 1 , wherein the second CR value is a value obtained by multiplying the first CR value by the number of the transport layers.
3. The method of claim 1 , wherein the second CR value is a value obtained by multiplying the first CR value by a pre-configured value related to the number of the transport layers.
4. The method of claim 3 , wherein the pre-configured value is configured based on at least one of a V2X resource pool, a bandwidth part (BWP), a service type, a service-related ProSe Per Packet Priority (PPPP), a service-related ProSe Per Packet Reliability (PPPR), or a numerology.
5. The method of claim 1 , wherein, as the number of transport layers increases, a CR value obtained based on the CR measurement is increase.
6. The method of claim 1 , further comprising:
performing the CR measurement based on a number of transmit antenna ports.
7. The method of claim 6 , wherein performing the CR measurement based on the number of transmit antenna ports comprises: determining the first CR value, and adjusting the first CR value to the second CR value based on the number of transmit antenna ports.
8. The method of claim 7 , wherein the second CR value is a value obtained by multiplying the first CR value by the number of transmit antenna ports.
9. The method of claim 7 , wherein the second CR value is a value obtained by multiplying the first CR value by a pre-configured value related to the number of the transmit antenna ports.
10. A method for performing, by a first device ( 100 ), sidelink transmission, the method comprising:
measuring a channel busy ratio (CBR); and
performing the sidelink transmission based on a rank value that is less than or equal to a rank value related to the measured CBR,
wherein the rank value includes at least one of a number of transport layers and a number of transmit antenna ports.
11. The method of claim 10 , wherein each of a plurality of CBRs are related to each of different rank values.
12. The method of claim 10 , wherein the rank value is configured based on at least one of a V2X resource pool, a bandwidth part (BWP), a service type, a service-related ProSe Per Packet Priority (PPPP), a service-related ProSe Per Packet Reliability (PPPR), or a numerology.
13. A first device ( 100 ) performing sidelink communication, the first device ( 100 ) comprising:
one or more memories; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers, wherein the one or more processors are configured to:
perform a channel occupancy ratio (CR) measurement based on a number of transport layers; and
perform the sidelink communication based on the CR measurement,
wherein the CR measurement is performed by determining a first CR value, and adjusting the first CR value to a second CR value based on the number of transport layers.