Mobile communication terminal and communication management apparatus

• Main Authors: OKA TOSHIO, MORITA JUNICHI
• Format: Patent
• Language: English
• Published: 17.08.2006
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION; WIRELESS COMMUNICATIONS NETWORKS

An object of the present invention is to provide a mobile communication terminal which can perform communication by a plurality of communication systems and which can change over communication from communication using a current communication system to communication using another communication system while taking a status of a destination terminal engaging in communication into consideration, and communication management apparatus for managing communication made by the mobile communication terminal. In order to solve the foregoing problem, the communication management apparatus according to the present invention is a cellular phone ( 101 ) capable of performing communication by a plurality of communication systems, wherein the plurality of communication systems include a WCDMA system and a communication system based on SIP (system for allowing an IP call), and the cellular phone ( 101 ) includes a WCDMA communication module ( 134 ) for making communication with a cellular phone ( 102 ) by the WCDMA system, a wireless LAN communication module ( 136 ) for performing communication with the cellular phone ( 102 ) by the communication system based on SIP, and a general control portion ( 141 ) for controlling the cellular phone ( 101 ) as a whole. The general control portion ( 141 ) determines whether the cellular phone ( 101 ) is or not within a hot spot as an area where communication can be made by the communication system based on SIP, during communication with the cellular phone ( 102 ) based on the WCDMA system. The general control portion ( 141 ) determines whether the cellular phone ( 102 ) is within a hot spot or not. When the general control ( 141 ) concludes that both the cellular phone ( 101 ) and the cellular phone ( 102 ) are within the hot spots, the general control portion ( 141 ) gives a wireless LAN communication control portion ( 142 ) an instruction to establish communication using the communication system based on SIP. Then, the general control portion ( 141 ) gives a WCDMA communication control portion ( 143 ) an instruction to cut off communication using the WCDMA system.