Method and apparatus for load distribution using a plurality of carriers in communication system supporting vehicle-to-everything communication

1. An operation method of a first communication node in a communication system supporting Vehicle-to-Everything (V2X) communication, the operation method comprising:

determining at least one frequency band to be used for transmission of semi-persistent scheduling (SPS) traffic between the first communication node and a second communication node among a plurality of frequency bands for the first communication node;

generating user equipment (UE) assistance information including information indicating the at least one frequency band for the SPS traffic; and

transmitting the UE assistance information to a base station supporting the V2X communication using a radio resource between the first communication node and the base station,

wherein the information indicating the at least one frequency band indicates an available frequency band for transmission of the SPS traffic among aggregated frequency bands, the at least one frequency band indicated by the UE assistance information is used for determining one or more frequency bands to which a SPS configuration is applied, and the SPS traffic is transmitted in the one or more frequency bands including the at least one frequency band determined by the first communication node, and

wherein the determining of the at least one frequency band comprises:

measuring congestion in a first frequency band used for the V2X communication with the second communication node; and

determining the at least one frequency band for transmission of the SPS traffic when the congestion in the first frequency band is greater than or equal to a predetermined threshold.

2. The operation method according to claim 1 , further comprising receiving, from the base station, a SPS configuration activation message for the frequency band determined based on the UE assistance information.

3. The operation method according to claim 2 , wherein the SPS configuration activation message includes information indicating the frequency band to which the SPS configuration is applied.

4. The operation method according to claim 1 , wherein the at least one frequency band is determined based on a channel busy ratio (CBR) measured by the first communication node.

5. The operation method according to claim 1 , wherein the information indicating the at least one frequency band indicates a set of two or more frequency bands.

6. The operation method according to claim 1 , further comprising generating the SPS configuration applied to the at least one frequency band,

wherein the SPS configuration is transmitted to the base station using the UE assistance information.

7. The operation method according to claim 6 , wherein, when a number of frequency bands to which the SPS configuration is applied is N and a transmission interval in a prior V2X communication procedure of the first communication node is T transmission time intervals (TTIs), a transmission interval in the SPS configuration is set to N×T TTIs, N is an integer greater than or equal to 2, and T is an integer greater than or equal to 1.

8. The operation method according to claim 6 , wherein, when a number of frequency bands to which the SPS configuration is applied is N and a transmission interval in a prior V2X communication procedure of the first communication node is T TTIs, a transmission interval in the SPS configuration is set to T TTIs, a size of data transmitted through each of the N frequency bands equals (a size of total data to be transmitted to the second communication node which performs the V2X communication with the first communication node)/N, N is an integer greater than or equal to 2, and T is an integer greater than or equal to 1.

9. The operation method according to claim 6 , wherein, when a number of frequency bands to which the SPS configuration is applied is N and a transmission interval in a prior V2X communication procedure of the first communication node is T TTIs, a transmission interval in the SPS configuration is set to T TTIs, a size of data transmitted through each of the N frequency bands is inversely proportional to a congestion of each of the N frequency bands, N is an integer greater than or equal to 2, and T is an integer greater than or equal to 1.

10. An operation method of a base station in a communication system supporting Vehicle-to-Everything (V2X) communication, the operation method comprising:

receiving, from a first communication node, user equipment (UE) assistance information including information indicating frequency bands to be used for transmission of semi-persistent scheduling (SPS) traffic between the first communication node and a second communication node;

determining at least one frequency band to which a SPS configuration is applied among the frequency bands indicated by the UE assistance information; and

transmitting, to the first communication node, a SPS configuration activation message instructing activation of the SPS configuration for the at least one frequency band,

wherein the information indicating the frequency bands for transmission of the SPS traffic indicates an available frequency band for transmission of the SPS traffic among aggregated frequency bands, the UE assistance information is received through a radio resource between the first communication node and the base station, and the SPS traffic is transmitted in the at least frequency band belonging to the frequency bands determined by the first communication node, and

wherein the determining of the at least one frequency band comprises:

measuring, by the first communication node, congestion in a first frequency band used for the V2X communication with the second communication node; and

determining, by the first communication node, the at least one frequency band for transmission of the SPS traffic when the congestion in the first frequency band is greater than or equal to a predetermined threshold.

11. The operation method according to claim 10 , wherein the SPS configuration activation message includes information indicating the at least one frequency band to which the SPS configuration is applied.

12. The operation method according to claim 10 , wherein the frequency bands for transmission of the SPS traffic are determined based on a channel busy ratio (CBR) measured by the first communication node.

13. The operation method according to claim 10 , wherein the information indicating the frequency bands for transmission of the SPS traffic indicates a set of two or more frequency bands.

14. The operation method according to claim 10 , further comprising generating the SPS configuration to be applied to the at least one frequency band,

wherein the SPS configuration is transmitted to the first communication node via the SPS configuration activation message.

15. The operation method according to claim 14 , wherein, when a number of frequency bands to which the SPS configuration is applied is N and a transmission interval in a prior V2X communication procedure of the first communication node is T transmission time intervals (TTIs), a transmission interval in the SPS configuration is set to N×T TTIs, N is an integer greater than or equal to 2, and T is an integer greater than or equal to 1.

16. The operation method according to claim 14 , wherein, when a number of frequency bands to which the SPS configuration is applied is N and a transmission interval in a prior V2X communication procedure of the first communication node is T TTIs, a transmission interval in the SPS configuration is set to T TTIs, a size of data transmitted through each of the N frequency bands equals (a size of total data to be transmitted to the second communication node which performs the V2X communications with the first communication node)/N, N is an integer greater than or equal to 2, and T is an integer greater than or equal to 1.

17. The operation method according to claim 14 , wherein, when a number of frequency bands to which the SPS configuration is applied is N and a transmission interval in a prior V2X communication procedure of the first communication node is T TTIs, a transmission interval in the SPS configuration is set to T TTIs, a size of data transmitted through each of the N frequency bands is inversely proportional to a congestion of each of the N frequency bands, N is an integer greater than or equal to 2, and T is an integer greater than or equal to 1.