Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-12-27
2005-12-27
Le, Danh Cong (Department: 2683)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S436000, C455S437000, C370S332000, C370S331000
Reexamination Certificate
active
06980804
ABSTRACT:
An automatic changeover method of communication networks includes steps (a) to (d). In the step (a), a first station communicates with a second station through a first wireless communication network. In the step (b), the first station measures a first level fluctuation value more than once, wherein the first level fluctuation value indicates a fluctuation degree of electric field intensity of an electromagnetic wave received from the first wireless communication network. In the step (c), the first station calculates a first average level fluctuation value, wherein the first average level fluctuation value is an average of a plurality of the first level fluctuation values. In the step (d), the first station changes over from the first wireless communication network to a second wireless communication network based on the first average level fluctuation value. The first wireless communication network may be a network for a wireless LAN (Local Area Network), and the second wireless communication network may be a network for a PHS (personal Handyphone System).
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Kobayashi Yoshikazu
Maki Hideo
Foley & Lardner LLP
NEC Infrontia Corporation
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