Mobility management method and apparatus

A control plane network element, applied to a scenario in which a first terminal device moves, and comprising:

• a processor, configured to:
• determine a changed media access control (MAC) address of the first terminal device after the first terminal device moves;
• and
• determine at least one second terminal device that belongs to a terminal device group as the first terminal device, wherein the first terminal device is a terminal device whose address changes after the movement, and the at least one second terminal device is a terminal device other than the first terminal device in the terminal device group;
• and
• a transmitter, configured to, in coordination with the processor notify the first terminal device and the at least one second terminal device to update to the changed MAC address of the first terminal device, wherein the transmitter is further configured to:
• send first address update information to the first terminal device through a first device, wherein the first address update information comprises the changed MAC address of the first terminal device, and the first device is one of a target access device serving the first terminal device after the first terminal device moves, a target user plane function network element serving the first terminal device after the first terminal device moves, and a target integrated device serving the first terminal device after the first terminal device moves, wherein the target integrated device is a device in which an access device and a user plane function network element are integrated.

An apparatus, comprising:

• a receiver, configured to in coordination with a processor obtain, from a control plane network element, a notification of updating to a changed media access control (MAC) address of a first terminal device;
• and
• wherein the processor is configured to update a MAC address to the changed MAC address of the first terminal device, wherein the apparatus is for the first terminal device, wherein the receiver is further configured to:
• receive first address update information sent by the control plane network element through a first device, wherein the first address update information comprises the changed MAC address of the first terminal device, and the first device is one of a target access device serving the first terminal device after the first terminal device moves, a target user plane function network element serving the first terminal device after the first terminal device moves, and a target integrated device serving the first terminal device after the first terminal device moves, wherein the target integrated device is a device in which an access device and a user plane function network element are integrated.