Telecommunications – Transmitter and receiver at separate stations
Patent
1988-12-21
1991-02-19
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
455 34, 455 51, 455 56, 379 60, 375 5, H04Q 700, H04B 100
Patent
active
049950975
ABSTRACT:
A radio system allows for exchanging messages between a set of relay stations (R1, R2, R3 . . . ) and mobile access stations (M . . . ) for communications. At least one common semaphore channel is used through which the relay stations simultaneously transmit code signals (M(R1)+M(R2)+M(R3)+. . . ) at first preset instants and separately transmit a code signal at other preset time instants, the access stations tap the said channel at these various preset instants and the recognition in the access station of code signals received in the first preset instants and the quality of code signals received in the other preset instants constitutes a criterion for establishing the connection between the access station and a relay station corresponding to the recognized code.
REFERENCES:
patent: 4754453 (1988-06-01), Eizenhofer
patent: 4765753 (1988-08-01), Schmidt
patent: 4799252 (1989-01-01), Eizenhoffer et al.
patent: 4815073 (1989-03-01), Grauel et al.
G. Banquet et al., "Ramage, A Private Mobile Radiotelephone Network", Commutation and Transmission, No. 1, 1986, pp. 19-30.
Eisenzopf Reinhard J.
Kuntz Curtis
Slobod Jack D.
U.S. Philips Corporation
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