Communication method, communication apparatus, and communication system for updating user equipment identification information

A core network device comprising:

• a transceiver;
• memory storing instructions;
• and
• a processor coupled to the transceiver and the memory, wherein the instructions, when executed by the processor, cause the core network device to:
• receive a message transmitted by a first access network device, the message comprising a first identifier of a user equipment (UE);
• assign to the UE a second identifier based on the first identifier in the received message, wherein the second identifier is to be used as an identifier of the first access network device to communicate with a network device in an Open Radio Access Network (O-RAN);
• and
• transmit a first request message to the first access network device, the first request message comprising the second identifier assigned to the UE,
• wherein the first identifier is associated with one of an International Mobile Subscriber Identifier (IMSI), a Globally Unique Temporary UE Identifier (GUTI) and a Serving-Temporary Mobile Subscriber Identifier (S-TMSI).

A first access network device comprising:

• a transceiver;
• memory storing instructions;
• and
• a processor coupled to the transceiver and the memory, wherein the instructions, when executed by the processor, cause the first access network device to:
• transmit a message to a core network device, the message comprising a first identifier of a user equipment (UE);
• receive a first request message from the core network device, the first request message comprising a second identifier assigned to the UE by the core network device based on the first identifier;
• and
• set the second identifier as an identifier of the UE, to communicate with communicating with a network device in an Open Radio Access Network (O-RAN),
• wherein the first identifier is associated with one of an International Mobile Subscriber Identifier (IMSI), a Globally Unique Temporary UE Identifier (GUTI) and a Serving-Temporary Mobile Subscriber Identifier (S-TMSI).