Method and apparatus for load distribution using heterogeneous radio access technologies in communication system supporting vehicle-to-everything communication

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

• performing V2X communication with a second communication node using an original resource according to an original Semi-Persistent Scheduling (SPS) configuration set by a serving base station;
• when a congestion level in the original resource is greater than or equal to a predetermined threshold and at least one target base station supporting the V2X communication is discovered, transmitting user equipment (UE) assistance information including at least one identifier of the at least one target base station to the serving base station;
• receiving, from the serving base station, a message including a new SPS configuration to be applied to the serving base station and the at least one target base station;
• performing a message transmission and reception procedure with the at least one target base station for delivery of the new SPS configuration;
• and
• performing the V2X communication with the second communication node using a first resource scheduled by the serving base station based on the new SPS configuration and a second resource scheduled by the at least one target base station based on the new SPS configuration.