Method of radio telecommunication and device for implementation thereof

• US 4,580,266 A
• Filed: 05/16/1983
• Issued: 04/01/1986
• Est. Priority Date: 09/16/1981
• Status: Expired due to Fees

• Current Assignee: Societe Electronique Du Nord-Est Parisien Seinep
• Original Assignee: Societe Electronique Du Nord-Est Parisien Seinep
• Inventors: Makowski, Pierre, Kletzkine, Richard
• Primary Examiner(s): Atkinson, Charles E.
• Application Number:
  US06/499,760
• Time in Patent Office: 1,051 Days
• Field of Search: 371/32, 371/33, 371/34, 371/57, 340/825.5, 364/710, 455/57, 455/58, 370/85
• US Class Current: 714/811
• CPC Class Codes: H04B 7/24 for communication between two or more posts wireless communication networks H04W

Abstract

Method and device for radio telecommunication between a central station and a certain number of peripheral stations. In each station, a device 1 is connected to a radio transmitter-receiver 2 and comprises a keyboard 5 for introducing messages which are stored in a memory 15. A microprocessor 13 continuously tests the availability of the radio channel and automatically transmits the message as soon as the channel is free. Application to the operation of delivery or commercial-traveling network.

Claims

1. A device for radio telecommunication in the simplex mode or in the alternate duplex mode between central stations and a certain number of secondary stations, this device being provided in each of said stations and comprising a transmitter-received stage (2), a microphone-loudspeaker assembly (3), connectors (8,9) for connecting respectively to the transmitter-receiver and to the microphone-loudspeaker assembly, an alphanumeric luminous display device (11), a microprocessor (13) containing a PROM program memory and connected on the one hand to a data introduction stage (14) and on the other hand to a transmission memory (15) connected to the transmitter (2a) of said transmitter-receiver stage (2) through a modulator-demodulator (MODEM) (16) and through a said connector (8) via a line (17) for information transmitted at low frequency (INFEBF), a reception memory (18) connected to the receiver (2b) of said transmitter-receiver stage (2) through the MODEM (16) via a line (18) for information received at low frequency (INFEBF), said reception memory (18) being also connected to a stage (19) for indicating messages received via the microprocessor (13) and comprising a voice synthesizer (21), the output of which is connected via a line BFHP to the loudspeaker HP of said microphone-loudspeaker assembly (3), said assembly (3) comprising further a microphone M from which extends a low-frequency transmission line BFE which returns to the line (17) which terminates at the transmitter (2a) via another said connector (9), via a control unit CTR and a multiwire cable (22) so as to return to the low-frequency information line (17), said assembly (3) also comprising a control unit (23) from which extend call connections AP and alternate transmission connections AL which terminates via the same channel at the transmitter (2a), said control unit CTR being in a mutually dependent relationship with the microprocessor (13) and receiving via a multiwire cable (24), service data derived from the receiver (2b), namely a received-code data item (25), a free-channel data item (26) and a data item (27) indicating the presence of a low-frequency message which is intended for the loudspeaker, said microprocessor (13) further comprising a counter K which counts the pulses of a clock H and is connected to the transmission memory (15) by means of a dating connection (D).