Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-02-18
1998-10-20
Urban, Edward F.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455429, 455437, 455 132, H04Q 738, H04B 7185
Patent
active
058261907
ABSTRACT:
An emergency handoff method (50) reroutes or redirects communications from one channel in a cell (105) to another channel in the same cell (105) or a different cell (107). Handoff is initiated by a subscriber unit (SU) (100) when the SU (100) determines that an emergency handoff is needed. Once a new channel is needed, the SU (100) chooses a new, available channel to transfer its communication. After selecting an available channel, the SU (100) acquires the available channel. The servicing satellite which is providing the available channel then makes the constellation of satellites reroute or redirect the call data or the communication packets across the new channel to the SU (100).
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patent: 5267261 (1993-11-01), Blakeney, II et al.
patent: 5379446 (1995-01-01), Murase
patent: 5394561 (1995-02-01), Freeburg
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patent: 5488640 (1996-01-01), Redden et al.
patent: 5561838 (1996-10-01), Chandros et al.
patent: 5625867 (1997-04-01), Rouffet et al.
Bakke Bradley B.
Krutz Michael William
Tayloe Daniel Richard
McGurk Harold C.
Motorola Inc.
Sobutka Philip J.
Urban Edward F.
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