Method and apparatus for core network registration and radio access network notification update

A user equipment (UE), comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the UE to:
• store first registration information of a last serving cell;
• receive, from a first communication device, a message comprising second registration information of a serving cell of the first communication device, wherein the serving cell of the first communication device comprises a serving cell of a base station, and the base station is separate from the first communication device;
• and
• determine whether to perform a registration procedure based on the first registration information and the second registration information.

A processor for wireless communication, comprising:

• at least one controller coupled with at least one memory and configured to cause the processor to:
• store first registration information of a last serving cell;
• receive, from a first communication device, a message comprising second registration information of a serving cell of the first communication device, wherein the serving cell of the first communication device comprises a serving cell of a base station, and the base station is separate from the first communication device;
• and
• determine whether to perform a registration procedure based on the first registration information and the second registration information.