Method for accessing local network and device

A method for accessing a local network, comprising:

• subscribing, by a network device, to service area change information of user equipment, wherein the service area change information of the user equipment indicates that the user equipment enters or leaves a service area of the local network;
• receiving the service area change information of the user equipment;
• and
• performing, based on the received service area change information, policy control for a case in which the user equipment accesses or leaves the local network.

User equipment, comprising a receiver, a processor, and a transmitter, wherein

• the receiver is configured to receive a system message broadcast by a base station;
• the processor is configured to determine, based on the system message, that a service area is changed;
• and
• the transmitter is configured to notify a network device that the service area is changed, so that the network device performs policy control for accessing or leaving a local network corresponding to the service area.

A network device, comprising a transmitter, a receiver, and a processor, wherein

• the transmitter is configured to subscribe to service area change information of user equipment, wherein the service area change information of the user equipment indicates that the user equipment enters or leaves a service area of a local network;
• the receiver is configured to receive the service area change information of the user equipment;
• and
• the processor is configured to perform, based on the received service area change information, policy control for a case in which the user equipment accesses or leaves the local network.

A base station device, comprising a processor and a transmitter, wherein

• the processor is configured to generate a system message, wherein the system message comprises an identifier of a service area;
• and
• the transmitter is configured to broadcast the system message to user equipment, to notify the user equipment of the service area in which the user equipment is currently located;
• wherein
• the identifier of the service area corresponds to the service area of a local network, and the service area comprises one or more location areas.