Method and device for performing v2x communication

A method for performing vehicle to everything (V2X) communication by a device in a wireless communication system, comprising:

• receiving information indicating a postponement of resource allocation for a V2X bearer from a base station, wherein the V2X bearer is a bearer being used for V2X service;
• performing marking on the V2X bearer, wherein the marking indicates a postponement of a deactivation of the V2X bearer;
• and
• maintaining a context of the marked V2X bearer.

A base station performing vehicle to everything (V2X) communication in a wireless communication system, comprising:

• a memory;
• a transceiver;
• and
• a processor operatively connecting the memory and the transceiver,
• wherein the processor is configured:
• to control the transceiver to receive a V2X bearer indication indicating a V2X bearer, wherein the V2X bearer is a bearer being used for V2X service,
• to determine that the base station supports only PC5-based V2X service, among PC5-based V2X service and Uu-based V2X service,
• to postpone resource allocation of the V2X bearer, and
• to control the transceiver to transmit information indicating a postponement of resource allocation for the V2X bearer to a mobility management entity (MME).