Method and apparatus for supporting vehicle communications in 5G system

A method performed by an access and mobility management function (AMF) in a wireless communication system, the method comprising:

• receiving, from a policy control function (PCF), a user equipment (UE) configuration update message including mapping information based on a UE policy update being triggered by the PCF, the mapping information for mapping between at least one vehicle to everything (V2X) service type and at least one radio access technology (RAT) type;
• and
• transmitting, to a terminal, the mapping information for the terminal to select at least one RAT type corresponding to a V2X message to be transmitted and to transmit the V2X message using the selected at least one RAT type,
• wherein the at least one RAT type is selected by a V2X layer of the terminal.

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller configured to:
• receive, from an access and mobility management function (AMF) via the transceiver, a user equipment (UE) configuration update message including mapping information received from a policy control function (PCF) based on a UE policy update being triggered by the PCF, the mapping information for mapping between at least one vehicle to everything (V2X) service type and at least one radio access technology (RAT) type,
• select at least one RAT type corresponding to a V2X message to be transmitted, based on the mapping information, and
• transmit, via the transceiver, the V2X message using the selected at least one RAT type,
• wherein the at least one RAT type is selected by a V2X layer of the terminal.

An access and mobility management function (AMF) in a wireless communication system, the AMF comprising:

• a transceiver;
• and
• a controller configured to:
• receive, from a policy control function (PCF) via the transceiver, a user equipment (UE) configuration update message including mapping information based on a UE policy update being triggered by the PCF, the mapping information for mapping between at least one vehicle to everything (V2X) service type and at least one radio access technology (RAT) type, and
• transmit, to a terminal via the transceiver, the mapping information for the terminal to select at least one RAT type corresponding to a V2X message to be transmitted and to transmit the V2X message using the selected at least one RAT type,
• wherein the at least one RAT type is selected by a V2X layer of the terminal.