Communication system, server, and communication method and apparatus

A communication method, wherein the method is applied to a communication system, the communication system comprises a multi-access edge computing (MEC) system and a digital reflection (DR), at least one DR is deployed on the MEC system, the DR is associated with one group of terminal devices, and the group of terminal devices comprise at least one terminal device;

• the DR is configured to provide a service for the group of terminal devices associated with the DR;
• the DR has at least one core network function, wherein the core network function comprises mobility management, unified data management, session management, policy management, or access authentication and authorization;
• and the method comprises:
• when the terminal device migrates from a first MEC system to a second MEC system, receiving, by the terminal device, indication information of the second MEC system, wherein the indication information indicates an association relationship between the terminal device and a second DR, and the second DR is a DR that is in the second MEC system and that is associated with the terminal device;
• and
• establishing, by the terminal device, a connection to the second DR based on the indication information.

A communication method, wherein the method is applied to a communication system, the communication system comprises a multi-access edge computing (MEC) system and a digital reflection (DR), at least one DR is deployed on the MEC, the DR is associated with one group of terminal devices, and the group of terminal devices comprise at least one terminal device;

• the DR is configured to provide a service for the group of terminal devices associated with the DR;
• the DR has at least one core network function, wherein the core network function comprises mobility management, unified data management, session management, policy management, or access authentication and authorization;
• and the method comprises:
• receiving, by a second DR, indication information of a second MEC system, wherein the second DR is a DR that is in the second MEC system and that corresponds to the terminal device, the second MEC system is an MEC system connected to the terminal device after the terminal device migrates from a first MEC system, and the indication information indicates an association relationship between the terminal device and the second DR;
• and
• establishing, by the second DR, a connection to the terminal device based on the indication information.