Connection method, configuration updating method, control plane device, and user plane device

A connection method, comprising:

• transmitting, by a user plane of a centralized unit, a request message for establishing a connection to a control plane of the centralized unit, wherein the request message comprises first information corresponding to the user plane;
• receiving, by the user plane from the control plane, a response message indicating that the connection has been successfully established, wherein the response message comprises second information corresponding to the control plane, the second information including an identification (ID) of the control plane;
• transmitting, by the user plane, a capacity updating message to the control plane, wherein the capacity updating message comprises the first information corresponding to the user plane;
• and
• receiving, by the user plane from the control plane, a capacity updating acknowledgement message or a capacity updating failure message,
• wherein the first information corresponding to the user plane includes:
• configuration information about a public land mobile network supported by the user plane;
• and
• configuration information about a network slice supported by the user plane.

A control plane device, comprising a processor and a memory;

• wherein the processor is configured to execute a connection program stored in the memory to implement the following steps:
• transmitting a request message for establishing a connection to a user plane device, wherein the request message comprises first information corresponding to the control plane device;
• and
• receiving, from the user plane device, a response message indicating that the connection has been successfully established, wherein the response message comprises second information corresponding to the user plane device, the second information including:
• configuration information about a public land mobile network supported by the user plane device;
• and
• configuration information about a network slice supported by the user plane device.

A user plane device, comprising a processor and a memory;

• wherein the processor is configured to execute a connection program stored in the memory to implement the following steps:
• transmitting a request message for establishing a connection to a control plane device, wherein the request message comprises first information corresponding to the user plane device;
• receiving, from the control plane device, a response message indicating that the connection has been successfully established, wherein the response message comprises second information corresponding to the control plane device, the second information including an identification (ID) of the control plane device;
• transmitting a capacity updating message to the control plane device, wherein the capacity updating message comprises the first information corresponding to the user plane device;
• and
• receiving, from the control plane device, a capacity updating acknowledgement message or a capacity updating failure message,
• wherein the first information corresponding to the user plane device includes:
• configuration information about a public land mobile network supported by the user plane device;
• and
• configuration information about a network slice supported by the user plane device.