Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-12-29
2000-12-05
Hunter, Daniel S.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455436, 455439, 455427, 455 121, H04B 7185, H04Q 720
Patent
active
061578347
ABSTRACT:
Interoperability between terrestrial cellular systems and satellite based cellular systems allows handoffs between different cellular systems. A call in progress by a subscriber unit (101) over a terrestrial based cellular system (100) which includes a mobile switching center (MSC) (105a) and a plurality of base stations (103a-d) is handed off to a satellite based cellular system (1000) comprising a satellite network (100a, 1001b), a regional gateway (1007) and an interface gateway (1005). A call in progress by subscriber unit (101) over satellite based cellular system (1000) is also handed off to terrestrial based cellular system (100). A dual mode subscriber unit (400) provides switching functionality (409) to switch between transmit modes.
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Bishop, Jr. James William
Helm Jim E.
Magee Steve
Bogacz Frank J.
Botsch Bradley J.
Hunter Daniel S.
Motorola Inc.
Zewdu Meless
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