Patent ID: 8412199

Claim:
A method of a mobile terminal (MT) for decreasing handover latency between a first network and a second network, the method comprising: when a first handover is performed from the first network to the second network, transmitting, to a Media Independent Handover Server (MIHS), context including first network access information that the MT uses to access the first network; when a second handover is performed from the second network to the first network, receiving, from the MIHS, through the currently used second network, the first network access information previously used to access the first network and which was previously transmitted from the MT to the MIHS; and performing the second handover from the second network back to the first network without a network scanning procedure, a ranging procedure, a security authentication procedure, a mobile Internet Protocol (IP) binding update procedure, and a service registration procedure, based on the first network access information received from the MIHS and which was previously transmitted from the MT to the MIHS, wherein the MIHS manages a profile of information varied in real-time, and the profile of information comprises at least one of Internet Protocol address of the MT, authentication information, and a using service characteristic.