Communication system switching method, and terminal device...

Details Communication system switching method, and terminal device... Communication system switching method, and terminal device...

2007-05-01

2007-05-01

Tran, CongVan (Department: 2617)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S134000, C455S161300, C455S226200, C370S331000, C370S332000, C370S248000

Reexamination Certificate

active

10850695

ABSTRACT:
A W-LAN communication unit, a personal handyphone communication unit and an EV-DO communication unit include communication functions corresponding to their communication systems. A W-LAN quality measurement unit detects a value corresponding to RSSI, which is the reception power. An EV-DO quality measurement unit periodically obtains EV-DO quality values. A throughput measurement unit measures the throughput values for the individual communication systems. A condition setting unit designates a condition for the selection of the W-LAN communication unit, the personal handyphone communication unit or the EV-DO communication unit. A threshold value storage unit stores threshold values. A first determination unit compares the throughput values for the W-LAN and the RSSI with threshold values. A second determination unit compares the EV-DO quality values with threshold values. And a selector performs the switching of communication systems.

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