Patent ID: 9313650
Filing Date: 2016-04-12
CPC Classification: H04L,H04W

Claim Text:
1. A communication system including a mobile communication device that performs mobile communication and a transition control device that controls a transition between mobile communication networks over which the mobile communication device performs mobile communication, the mobile communication device comprising: an attachment unit for attaching thereto a subscriber authentication module that stores therein first connection information and second connection information, the first connection information corresponding to a mobile communication network and being necessary for performing mobile communication over the mobile communication network, the second connection information being necessary for performing communication with a connection information management server provided corresponding to a mobile communication network and configured to perform rewrite control on the first connection information; and circuitry configured to receive, through a mobile communication network associated with the first connection information stored in the subscriber authentication module attached by the attachment unit, the second connection information associated with a connection information management server corresponding to a destination mobile communication network different from the mobile communication network, and store the received second connection information in the subscriber authentication module; and perform communication directly with the connection information management server corresponding to the destination mobile communication network, using the received second connection information and stored in the subscriber authentication module attached by the attachment unit, to receive the first connection information associated with the destination mobile communication network, and store the received first connection information in the subscriber authentication module, the transition control device comprising: circuitry configured to input a transition request to make a transition between mobile communication networks over which the mobile communication device performs mobile communication; transmit the second connection information associated with the connection information management server corresponding to the destination mobile communication network, to the mobile communication device associated with the transition request input, through a source mobile communication network; and generate the first connection information associated with the destination mobile communication network for the mobile communication device associated with the transition request input, and transmit the generated first connection information to the connection information management server corresponding to the destination mobile communication network.