Telecommunications – Transmitter and receiver at separate stations – Single message via plural carrier wave transmission
Patent
1990-11-26
1993-05-18
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
Single message via plural carrier wave transmission
455 561, H04B 726
Patent
active
052128326
ABSTRACT:
A method and apparatus for operator messaging within a radio communication system (200) using a resource controller (203), which allocates a plurality of communication resources among a plurality of communication units (213, 215), is disclosed. Each of these communication units may be used by an operator having an operator code (262) and associated with a message (264, 266). This operator code and message, along with identification codes (252) representing each of the plurality of communication resources, are stored in a database (201) within the resource controller (203). The method includes the transmitting of the identification (ID) associated with a transmitting communication unit, matching this ID with one of the stored identification codes (252) in the database (201), and using this code to retrieve the message (254, 256) associated with the operator of this communication unit. This message is then sent, via sub-audible signals on the allocated communication resource, to at least one receiving communication unit (213, 215), which then displays (374) this message to be read by the receiving operator.
REFERENCES:
patent: 4701944 (1987-10-01), Howard et al.
patent: 4716407 (1987-12-01), Borras et al.
patent: 4723264 (1988-02-01), Sasuta et al.
patent: 4939746 (1990-07-01), Childress
patent: 5063588 (1991-11-01), Patsiokas et al.
LTR 8000 Repeater System Manual, E. F. Johnson, Co.-discloses the operation of their Logic Trunked Radio (LTR) system as well as the feature specific to the 8000 model series of repeaters and mobiles. In particular, .sctn.3.4 discusses signalling methods and data message formatting used in the LTR systems, 1982.
Coffing James A.
Eisenzopf Reinhard J.
Krause Joseph P.
Motorola Inc.
Parmelee Steven G.
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