Apparatus and method for controlling e2 node in wireless communication system

A method performed by an E2 node, the method comprising:

• receiving a subscription request message from a radio access network (RAN) intelligent controller (RIC);
• transmitting a subscription response message to the RIC;
• and
• transmitting a RIC indication message to the RIC, when an event occurs in response to the subscription response message,
• wherein the RIC indication message comprises a key user equipment (UE) identification (ID) structure and an update UE ID part, and
• wherein the key UE ID structure includes a key UE ID, and a update UE ID part indicates only changed information to the RIC.

An apparatus for performing one or more operations of a radio access network (RAN) intelligent controller (RIC), the apparatus comprising:

• at least one transceiver;
• and
• at least one processor,
• wherein the at least one processor is configured to control the at least one transceiver to:
• transmit a subscription request message to an E2 node;
• receive a subscription response message from the E2 node;
• and
• receive, from the E2 node, a RIC indication message,
• wherein the RIC indication message comprises a key user equipment (UE) identification (ID) structure and an update UE ID part, and
• wherein the key UE ID structure includes a key UE ID, and a update UE ID part indicates only changed information to the RIC.

An apparatus for performing one or more operations of an E2 node, the apparatus comprising:

• at least one transceiver;
• and
• at least one processor,
• wherein the at least one processor is configured to control the at least one transceiver to:
• receive a subscription request message from a radio access network (RAN) intelligent controller (RIC);
• transmit a subscription response message to the RIC;
• and
• transmit a RIC indication message to the RIC, when an event occurs in response to the subscription response message,
• wherein the RIC indication message comprises a key user equipment (UE) identification (ID) structure and an update UE ID part, and
• wherein the key UE ID structure includes a key UE ID, and a update UE ID part indicates only changed information to the RIC.