Abstract: A wireless communication apparatus including: a storage unit that stores timer values for a search of each of a plurality of wireless access networks, wherein each of the timer values is set according to communication characteristics of an application and a use priority of a wireless access network, and each of the timer values is associated with the application and the wireless access network; a timer unit that activates, when communication by an application is started, a timer at a timer value associated with the application and a wireless access network selected as a standby; and a selection unit that newly selects, when a wireless access network with a higher use priority than the wireless access network selected as the standby is detected by a search on expiration of the timer during the communication, the wireless access network with the higher use priority as a standby network.

Abstract: A communication system and a mobile communication terminal which are capable of receiving assignment of a high transmission rate upstream SCH (Supplement Channel). The mobile communication terminal requests assignment of an upstream SCH (step S11b), receives the transmission rate of the assigned SCH (step S11c), and if this transmission rate is not acceptable (namely, “unacceptable” in step S11d), then it requests release of the assigned SCH (step S11h) and again requests assignment of an upstream SCH (step S11i).