Session transfer method and method for supporting session continuity

A method for supporting a session transfer method and a method for supporting session continuity are provided to allow a service provider to move session to the other network desired by a user. A UE-a(110) performs a session for the UE-b and voice and non-voice transmitting data. The MMSC- AS(420) transmits the session mobile business operator policy with the UE-a. The session mobile business operator policy transmits MMSC AS or MMSC of logical entities. The MMSC-AS receives raw information from the external entity. The session mobile business operator policy is transmitted to the UE-a. The MMSC-AS directly receives the session mobile business operator policy from the external entity. The session mobile business operator policy is delivered to the UE-a.