Method and apparatus for transmitting packet in vehicle to everything service

A method performed by a second device in a wireless communication system, the method comprising:

• receiving, from a first device of a vehicle to everything (V2X) service, a first packet and a second packet;
• identifying whether the first packet and the second packet are duplicated packets, wherein the first packet and the second packet are duplicated packets in case that a proximity service (ProSe) per-packet reliability (PPPR) value of the first packet for the V2X service is greater than or equal to a configured PPPR threshold, and wherein the PPPR indicates a level of reliability required for the packet;
• and
• in case that the first packet and the second packet are duplicated packets, performing packet reordering.

A first device in a wireless communication system, the first device comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• obtain a configuration for a vehicle to everything (V2X) service,
• identify a parameter indicating a proximity service (ProSe) per-packet reliability (PPPR) value of a packet for the V2X service based on the configuration for the V2X service, wherein the PPPR value indicates a level of reliability required for the packet,
• in case that the parameter is greater than or equal to a configured PPPR threshold, duplicate the packet, and
• transmit, to a second device of the V2X service, the packet and a duplicated packet.

A second device in a wireless communication system, the second device comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• receive, from a first device of a vehicle to everything (V2X) service, a first packet and a second packet,
• identify whether the first packet and the second packet are duplicated packets, wherein the first packet and the second packet are duplicated packets in case that a proximity service (ProSe) per-packet reliability (PPPR) value of the first packet for the V2X service is greater than or equal to a configured PPPR threshold, and wherein the PPPR value indicates a level of reliability required for the packet, and
• in case that the first packet and the second packet are duplicated packets, perform packet reordering.