Method and apparatus for establishing session for data transmission and reception in wireless communication system

A method for establishing a shared session for a terminal to transmit and receive data in a wireless communication system, the method comprising:

• transmitting a session setup request message requesting a session setup to a radio access network (RAN) node,
• wherein the session setup request message includes at least one of a service type indicator indicating a type of a specific service requesting the session setup or first information related to adjacent RAN nodes supporting the specific service,
• wherein the first RAN node periodically receives the first information by the terminal repeatedly, depending on a type of the first information, and
• wherein the service type indicator is transmitted through RRC signaling when the service type indicator is not included in the session setup request message;
• and
• receiving a shared session setup complete message from the RAN node,
• wherein the shared session setup complete message includes a setup indicator indicating setup of a specific shared session and second information related to at least one RAN node to which the specific shared session is established, among the adjacent RAN nodes,
• wherein the specific shared session is established as a single session between at least one RAN nodes and multiple terminals and is a wireless path on which multiple terminals transmit and receive data related to the specific service to and from the same RAN node, and
• wherein the specific shared session is released when the number of terminals using the specific shared session is below a certain threshold value.

A first radio access network (RAN) node for establishing a shared session to transmit and receive data in a wireless communication system, the first RAN node comprising:

• a communication unit transmitting and receiving a radio signal to and from an external source;
• and
• a processor functionally coupled to the communication unit,
• wherein the processor is configured to:
• receive a session setup request message requesting a session setup from a terminal,
• wherein the first session setup request message includes at least one of a service type indicator indicating a type of a specific service requesting the session setup or first information related to adjacent RAN nodes supporting the specific service,
• wherein the terminal periodically transmits the first information to the first RAN node repeatedly, depending on a type of the first information, and
• wherein the service type indicator is transmitted through RRC signaling when the service type indicator is not included in the session setup request message,
• transmit the session setup request message to a first network node for the session setup,
• receive a shared session setup complete message from the first network node, and
• transmit the shared session setup complete message to the terminal,
• wherein the shared session setup complete message includes a setup indicator indicating setup of a specific shared session and second information related to at least one RAN node to which the specific shared session is established, among the adjacent RAN nodes,
• wherein the specific shared session is established as a single session between at least one RAN nodes and multiple terminals and is a wireless path on which multiple terminals transmit and receive data related to the specific service to and from the same RAN node, and
• wherein the specific shared session is released when the number of terminals using the specific shared session is below a certain threshold value.