Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-12-19
2006-12-19
Eng, George (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S435100, C455S435300, C455S436000, C455S438000, C455S439000, C455S442000, C370S216000, C370S238000, C370S351000
Reexamination Certificate
active
07151931
ABSTRACT:
A method and system enabling roaming between different wireless networks. A mobile device supporting low and high-tier wireless network standards is adapted to roam between a low-tier wireless network and a high-tier wireless network with lower bandwidth but more mobility than the low-tier wireless network. Via a virtual GPRS support node, a plurality of data packets and control signals are delivered between low and high-tier wireless networks.
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Lin Chia-Ching
Tsao Shiao-Li
Eng George
Industrial Technology Research Institute
Nguyen Khai
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