RU5695U1 - PERSONAL RADIO CALL SYSTEM - Google Patents

Abstract

A personal radio call system comprising an information input device connected to a control unit, a radio call transmitter connected to a transmitting antenna, a receiving antenna connected to a radio call receiver, characterized in that a digital signal converter into a set of tone frequencies, a converter of a set of tone frequencies into a digital signal and an additional transmitter with an antenna, while the converter of the digital signal into a set of tone frequencies is connected to the output of the control unit and the input of the transmitter call, and the converter of the set of tone frequencies into a digital signal to the output of the radio call receiver and the input of the additional transmitter, and the control unit is made in the form of a control computer, generating a signal in the form of an information stream having information and control parts.

Description

PERSONAL RADIO CALL SYSTEM

The utility model relates to communication systems and can be used in the implementation of mobile and operational personal radio call systems.

The known system of personal radio call / see application FRG & 3418507, MKI N 04M 11/02, publ. 21.II.85 g. /, Containing a central radio call station, at least one radio call transmitter connected to it and from the radio call receivers worn by the called persons with it in the radio contact. The station is connected to an automatic telephone switching network. Call orders are entered on telephones connected to the automatic telephone switching network by dialing the station code and then dialing the subscriber number of the wanted person. A conversation from the caller to the callee is established through the automatic telephone switching network, through the station, the radio call transmitter, the radio channel and the radio call receiver. At the same time, an analog-to-digital converter for encoding the waveform is introduced into the conversation connection at the station, and digital receiving memory blocks and a digital-to-analog converter connected to them are introduced into the radio call receivers. The talk block located between the output of the transducer for encoding the waveform and the input of the digital-to-analog transducer is formed to transmit digital signals coming from the transducer for encoding the waveform. Digital receiving memory

MPK6 N 04V 7/26 H 04M 11/00

the block and the analog-to-analog converter are formed to repeat the digital-to-analog conversion of the digital signals recorded in the digital receiving storage unit.

The main disadvantage of the known device. Is the low throughput of the system due to the presence of one channel. System reliability is low. The system does not allow to generate a signal in the form of an information stream, including information and control parts.

Closest to the claimed is a personal radio call / em system. USSR patent Jfe I83888I, MKI H 04B 7/26, bull. No. 32 dated 08/30/93, / containing an information input device, a control unit, an analog-to-digital converter, a synchronizer, a shift register, an OR element, a modulator, a transmitter, a transmitting antenna, a radio call receiver, which includes an antenna, a clock decoder, block for channel search of transmitted information, digital-to-analog converter and speaker.

The disadvantages of the known system are the presence of multi-channel communication, which necessitates the use of a separate channel control unit. The known system requires synchronization of the signal, which makes it impossible to transmit information in real time. In addition, the reliability of the system is low due to the presence of a large number of synchronization and signal switching elements. The system does not allow to generate a signal in the form of an information stream, including information and control parts.

The utility model is aimed at solving the problem of creating a mobile, operational and reliable personal radio call system.

a VA containing an information input device connected to a control unit, a radio call transmitter connected to a transmitting antenna, a receiving antenna connected to a radio call receiver, according to a utility model, into which a converter of a digital signal into a set of tone frequencies, a converter of a set of tone frequencies into a digital signal and an additional transmitter with an antenna, while the digital signal converter in the set of tone frequencies is connected to the output of the control unit and the input of the radio call transmitter, and the conversion tone dial

frequency in a digital signal to the output of the radio call receiver and the input of the additional transmitter, and the control unit is made

in the form of a control computer, forming a signal in the form of an information stream having information and control parts.

The drawing shows a functional diagram of the inventive system of a personal radio call.

The personal radio call system comprises an information input device I, a control unit in the form of a control computer 2, a digital signal converter into a set of tone frequencies 3, a radio call transmitter 4 with a transmitting antenna, a radio call receiver 5 with a receiving antenna, a tone set to digital signal converter 6, additional transmitter 7 with a transmitting antenna.

The information input device I is connected to at least one telephone set / not shown in the drawing / connected to an automatic telephone exchange.

The system operates as follows. Voice information from the telephone is fed to the input of information input device I, which converts it into a digital code. a digital code is fed to the input of the control computer 2, in which the formation of information takes place,

Mation flow from primary information and control signals of the system. The generated information stream in the form of a digital signal is fed to the input of the converter 3, which converts the digital code into a set of tone frequencies / or combinations thereof L. Then the set of frequencies is transmitted to the transmitter 4, amplified there and transmitted via the antenna to the air. The receiving antenna, having received tone signals, sends them to the receiving device 5, amplifies them and transmits them to the converter 6, which converts the set of tone frequencies into a digital code. The digital code arrives at transmitter 7, launches it, amplifies it and broadcasts it using an antenna to receive it on a subscriber set. A personal radio call receiver, a pager, is used as a subscriber set. In this case, the digital signal is supplied to the entire subscriber set / for example, to 100 pagers /, which is in standby mode. The control part of the information signal starts only that element of the subscriber set, the code of which coincides with the code embedded in the information part of the signal.

The transmitter 4 transmits tone frequencies over the low frequency channel. An additional transmitter 7, operating in standby mode, transmits a digital signal over a high-frequency channel.

A personal radio call system can be implemented as follows. The message received from the information input device and generated in the control unit as an information packet in the PocSftG- / protocol in accordance with the standards of the International Committee for the telecommunication output from the control unit is transmitted via a two-wire communication line to the converter, where the information packet is transcoded from the protocol РОС SAC-in protocol Be, it 202А according to the digital tone frequency algorithm. From the output of the converter, the information packet in the protocol 202A goes to the input of the radio transmitting device, it is amplified and goes through the transmitting antenna-feeder device. Further, the signal in the form of an information packet is received at the receiving antenna and fed through the feeder device to the input of the radio receiving device, where it is amplified and fed from the output of the radio receiving device via a two-wire communication line to the input of another converter. The information packet is inversely converted from the &&tt 202A protocol to the PQC.SAG- protocol. From the output of this converter, the signal in the form of a formed packet is fed to the input of the transmitter of the high-frequency signal, amplified and broadcast on the operating frequency of the transmitter.

The inventive system allows you to: I / send messages at a clearly defined time; 2 / work in real time, which provides the ability to conduct conference calls. The system ensures the presence of channel control signals in the information packet, archives information and organizes the possibility of a group call, while maintaining the closeness of the transmitted information.

Claims (1)

A personal radio call system comprising an information input device connected to a control unit, a radio call transmitter connected to a transmitting antenna, a receiving antenna connected to a radio call receiver, characterized in that a digital signal converter into a set of tone frequencies, a converter of a set of tone frequencies into a digital signal and an additional transmitter with an antenna, while the converter of the digital signal into a set of tone frequencies is connected to the output of the control unit and the input of the transmitter call, and the converter of the set of tone frequencies into a digital signal to the output of the radio call receiver and the input of the additional transmitter, and the control unit is made in the form of a control computer, generating a signal in the form of an information stream having information and control parts.