Patent ID: 7302262

Claim:
A mobile communications control method of controlling mobile communication by a mobile terminal in a network in which a plurality of wireless systems are available, the method comprising: location registering the mobile terminal with a location registration area associated with one of the plurality of wireless systems, said location registering including transmitting broadcast information including location registration area information of the plurality of wireless systems, receiving a location registration request including location registration area information from the mobile terminal, updating location registration area information of the mobile terminal according to the location registration area information from the location registration request of the mobile terminal; and selecting, at a network control function layer, a wireless system as a selected wireless system, on which to perform location registration, said location registration including associating the mobile terminal with a location area of the selected wireless system, from among the wireless systems, based on at least one of a status of the network, a status of the mobile terminal, location information of the mobile terminal, a frequency of incoming call reception of the mobile terminal, and service area information of the wireless systems.