Mobile terminal apparatus and method having network inter-operability
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United States of America Patent
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-
Mar 24, 1998
Grant Date -
N/A
app pub date -
Oct 13, 1994
filing date -
May 13, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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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