Mobile terminal apparatus and method having network inter-operab

Details Mobile terminal apparatus and method having network inter-operab Mobile terminal apparatus and method having network inter-operab

1994-10-13

1998-03-24

Urban, Edward F.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 74, 455435, 455437, H04B 138

Patent

active

057323593

ABSTRACT:
A mobile terminal apparatus that operates in both the cellular and satellite networks. The terminal device has five different operating modes. It operates in a satellite only mode, a cellular only mode, an autoroam with satellite priority mode, an autoroam with cellular priority mode, and autoroam with cellular home location register (HLR) priority mode. The terminal apparatus monitors the cellular operation and satellite operation concomitantly. When a call is in progress in the cellular system, a seamless handoff may be effected to the satellite system.

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