Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-07-19
2005-07-19
Trinh, Sonny (Department: 2687)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S458000, C455S515000, C455S432100, C455S436000, C455S444000
Reexamination Certificate
active
06920322
ABSTRACT:
Efficient paging control is achieved in a communication system that selectively provides one of communication services implemented by integrating a plurality of communication systems. Before transmitting a downlink signal to a terminal, a gateway requests each of the communication systems to transmit a paging signal to the terminal. Receiving the paging signals transmitted from the communication systems, the terminal selects a communication system A with the lowest communication cost in accordance with communication cost information contained in the paging signal. The terminal sends a request for connection to the selected communication system A. As a result, the communication system A transmits the downlink signal to the terminal.
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Ikeda Takehiro
Okajima Ichiro
Umeda Narumi
NTT DoCoMo Inc.
Phan Huy
Trinh Sonny
Workman Nydegger
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