Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Patent
1997-09-29
1999-09-28
Chin, Wellington
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
455519, 455520, 455509, 370347, H04Q 738
Patent
active
059603607
ABSTRACT:
A communication method is provided in which mobiles operating in a trunk mode operation transmit a message on a direct mode operation channel indicating a trunk mode operation connection is present. If a mobile outside the range of coverage of the trunking system receives the message it will deduce from the message the slot structure of the trunk mode channel and its timing, and will then be able to transmit a request for a direct mode connection on an appropriate slot of the trunk mode channel. Some or all of the mobiles operating in trunk mode will then be able to switch to direct mode to connect with the mobile outside the range of coverage.
REFERENCES:
patent: 4833701 (1989-05-01), Comroe et al.
patent: 5214790 (1993-05-01), Kozlowski et al.
patent: 5515366 (1996-05-01), Chieu et al.
patent: 5535426 (1996-07-01), Leigh et al.
patent: 5666661 (1997-09-01), Grube et al.
patent: 5781860 (1998-07-01), Lopponen et al.
patent: 5822682 (1998-10-01), Schroderus et al.
Arviv Eli
Carmon Rafael
Shahaf Mark
Chin Wellington
Dorinski Dale W.
Jama Isaak R.
Motorola Inc.
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