Method and apparatus for supporting vehicle-to-everything (V2X) services on single one-to-one sidelink communication link in a wireless communication system

A first User Equipment (UE) to establish a one-to-one sidelink communication link, comprising:

• a processor;
• and
• a memory operatively coupled to the processor, wherein the processor is configured to execute a program code to:
• perform a discovery procedure to find a second UE;
• initiate a first service;
• establishing the one-to-one sidelink communication link with the second UE for the first service;
• negotiate a security configuration with the second UE for encrypting or decrypting data from the first service;
• initiate a second service;
• and
• encrypt or decrypt data from the second service with the security configuration used by the first service.

A method for a first User Equipment (UE) to support multiple services on a one-to-one sidelink communication link, comprising:

• performing a discovery procedure to find a second UE;
• initiating a first service;
• establishing the one-to-one sidelink communication link with the second UE for the first service;
• negotiating a security configuration with the second UE for encrypting or decrypting data from the first service, wherein at least one first sidelink traffic channel (STCH) or sidelink radio bearer (SLRB) is created for the first service;
• initiating a second service, wherein at least one second STCH or SLRB is created for the second service;
• and
• encrypting or decrypting data from the second service with the security configuration used by the first service.