Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-09-02
2000-09-12
Vo, Nguyen
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455432, 455434, H04Q 720
Patent
active
061190039
ABSTRACT:
A wireless user terminal (10), such as a multimode cellular telephone, includes at least three master control systems, specifically a primary system controller, a secondary system controller, and a multimode controller. The multimode controller is capable of bidirectionally exchanging control messages and status messages with the primary and secondary system controllers for automatically switching the state of the terminal bidirectionally between the primary and secondary systems.
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Nguyen Duc
Nokia Mobile Phones Limited
Vo Nguyen
LandOfFree
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