Base station device and method for operating base station device
The present disclosure is to implement a technique (scheme) of guaranteeing the mobility of an application server that enables a user equipment (UE) to seamlessly use a data service in real time even when the application server is changed.
1. A base station device to provide data services between a user equipment (UE) and a data network, the base station device comprising:
a memory to store instructions;
a processor configured to receive the instructions from the memory and to perform operations to:
determine a server address of an application server for a session for traffic transmission of a specific data service between a specific application in the UE and the application server;
determine, in real time, that a server address of the specific data service for the UE is changed in a state in which the session for traffic transmission of the specific data service between the specific application in the UE and the application server is established; and
in response to the determination that the server address of the specific data service is changed, transfer address information of the changed application server to the UE in real time such that the UE is to perform traffic transmission of the specific data service between the specific application in the UE and the changed application server using the transferred address information of the changed application server, and
wherein, when a notification of a change of the application server of the specific data service for the UE is provided from a node of a control plane, the processor is configured to transfer the address information of the changed application server via a message transmitted to the UE during a process of performing user plane reconfiguration that adds, removes, or rearranges a node of a user plane that is involved in the session.
2. The base station device of claim 1 , wherein, when a notification of a change of the application server of the specific data service for the UE is provided from a node of a control plane, the processor is configured to compare address information of the application server based on the notification and address information of the application server that the UE uses when performing the traffic transmission of the specific data service, and to determine whether the server address of the specific data service for the UE is changed based on the comparison.
3. The base station device of claim 2 , wherein the address information of the application server that the UE uses when performing the traffic transmission of the specific data service is monitored based on the node of the user plane that is involved in the session.
4. The base station device of claim 1 , wherein the processor is configured to transmit destination information including the address information to the UE, and
wherein the destination information comprises at least one information of address information including at least one of addresses of link layer (L12), internet layer (L3), transport layer (L4), and application layer (L7) according to internet protocol suite in association with the changed application server, activation information associated with a time point of performing traffic transmission using the address information of the changed application server, duration information associated with a performance period, information associated with a protocol apply scheme, and information associated with a protocol processing scheme.
5. The base station device of claim 1 , wherein the base station device is at least one of nodes of the control plane.
6. An operation method of a base station device, the method comprising:
determining a server address of an application server for a session for traffic transmission of a specific data service between a specific application in the UE and an application server;
determining, in real time, that a server address of the specific data service for the UE is changed in a state in which the session for traffic transmission of the specific data service between the specific application in the UE and the application server is established; and
in response to the determination that the server address of the specific data service is changed, transferring address information of a changed application server to the UE in real time such that the UE is to perform the traffic transmission of the specific data service between the specific application in the UE and the changed application server using the transferred address information of the changed application server,
wherein the determining in real time that the server address of the specific data service for the UE is changed comprises:
when a notification of a change of the application server of the specific data service for the UE is provided from a node of a control plane, transferring the address information of the changed application server via a message transmitted to the UE during a process of performing user plane reconfiguration that adds, removes, or rearranges a node of a user plane that is involved in the session.
7. The method of claim 6 , wherein the determining in real time that the server address of the specific data service for the UE is changed comprises:
comparing, when a notification of a change of the application server of the specific data service for the UE is provided from a node of a control plane, the address information of the application server based on the notification and address information of the application server that the UE uses when performing the traffic transmission of the specific data service; and
determining, based on a result of the comparison, whether the server address of the data service is changed.
8. The method of claim 7 , wherein the address information of the application server that the UE uses for traffic transmission of the specific data service is monitored based on the node of the user plane that is involved in the session.