Method and apparatus for establishing a communication link

Details Method and apparatus for establishing a communication link Method and apparatus for establishing a communication link

1994-07-01

1996-10-01

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 511, 379 58, 379 61, H04B 100

Patent

active

055618529

ABSTRACT:
A portable radio (104) initiates a communication link using a synchronous protocol format. A base station (102) generates a synchronization pattern (200) which includes a marker. The marker (202) includes a generic code that invites portables to make link requests. The portable radio (104) synchronizes to the marker (202) and recognizes the generic code that indicates base availability. The portable radio (104) sends a link request in response to the generic code to initiate the communication link, and the base station (102) grants a link in order to establish the communication link.

REFERENCES:
patent: 4001693 (1977-01-01), Stackhouse et al.
patent: 4400585 (1983-08-01), Kaman et al.
patent: 4414661 (1983-11-01), Karlstrom
patent: 4667191 (1987-05-01), Comroe et al.
patent: 4947162 (1990-08-01), Kimura
patent: 5155727 (1992-10-01), Borup et al.
patent: 5267244 (1993-11-01), Messerschmitt et al.
patent: 5280541 (1994-01-01), Marko et al.
patent: 5293419 (1994-03-01), Hirano
Reference Material: Interim European Telecommunication Standard-prl-ETS 300 131, RI/RES-03-15, 31 Jan. 1994, Second Edition, European Telecommunicatons Standards Institute 1994.

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