| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To switch a plurality of communication systems while taking into account their throughputs. <P>SOLUTION: A W-LAN communication unit 24, a personal handyphone communication unit 26 and an EV-DO communication unit 28 include communication functions corresponding to their communication systems. A W-LAN quality measurement unit 80 detects a value corresponding to RSSI which is the reception power. An EV-DO quality measurement unit 82 periodically obtains EV-DO quality values. A throughput measurement unit 74 measures the throughput values for the individual communication systems. A condition setting unit 76 designates a condition for the selection of the W-LAN communication unit 24, the personal handyphone communication unit 26 and the EV-DO communication unit 28. A threshold value storage unit 78 stores threshold values. A first determination unit 86 compares the throughput values for the W-LAN and the RSSI with threshold values. A second determination unit 88 compares the EV-DO quality values with threshold values. A selector 90 performs the switching of the communication systems. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
