Method and apparatus for transmitting data according to quality of service in wireless communications system

A method performed by a fifth node in a wireless communication system, the method comprising:

• receiving, from a first node, a traffic forwarding setup request message including group information and subgroup information, wherein the group information includes a list of a plurality of subgroups and the subgroup information includes quality of service (QoS) information for each of subgroups;
• generating, traffic forwarding rules based on the group information and the subgroup information;
• receiving, from a first terminal, traffic with an indication of a group to which the traffic is transmitted, wherein the traffic is received with a first QoS;
• and
• transmitting the traffic to a second terminal based on the indication, the group information and the subgroup information.

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

• a transceiver;
• and
• a controller configured to:
• receive, from a first terminal via a second node, a protocol data unit (PDU) session setup request message,
• obtain, from a third node, group information including a list of a plurality of subgroups,
• obtain, from a fourth node, subgroup information including quality of service (QoS) information for each of subgroups,
• transmit, to a fifth node, a traffic forwarding setup request message including the group information and subgroup information, and
• transmit, to the first terminal, PDU session setup response message including the group information and the subgroup information.

A fifth node in a wireless communication system, the fifth node comprising:

• a transceiver;
• and
• a controller configured to:
• receive, from a first node, a traffic forwarding setup request message including group information and subgroup information, wherein the group information includes a list of a plurality of subgroups and the subgroup information includes quality of service (QoS) information for each of subgroups,
• generate, traffic forwarding rules based on the group information and the subgroup information,
• receive, from a first terminal, traffic with an indication of a group to which the traffic is transmitted, wherein the traffic is received with a first QoS, and
• transmit the traffic to a second terminal based on the indication, the group information and the subgroup information.