RU2551352C1 - Cross repeater for organisation of interaction of radio networks of single-frequency and two-frequency simplex operating in two different frequency ranges, and conference communication radio network - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: in the cross-repeater the interaction of radio networks of a single-frequency and two-frequency simplex operating in two different frequency ranges, and a conference communication radio network is implemented. The cross-repeater contains two pairs of simplex radio stations connected to the power unit and to each other through an interface which in each pair through the duplex filter are connected to common antenna and operated at unmatched frequencies of conditional range. Interface has multiport adders - two per radio station, the low-frequency output of the receiver of each of which is connected to the noise suppressor and through the respective adders with the input of submodulator of transmitter of the radio stations operating in one of frequency ranges, and the output of the noise suppressor of each of radio stations through the respective adders is connected to the control transmitter of radio stations operating in another frequency range. Pairs of simplex radio stations can operate in the ranges respectively 160 MHz and 460 MHz.

EFFECT: expansion of scope of application of repeaters for organising of interaction of several radio networks operating in different frequency ranges.

2 cl, 3 dwg

Description

The invention relates to radio devices, namely cross-relays, designed to organize mobile radio networks of special services (SSN), and can be used in radio communication systems with mobile objects to ensure law and order, public safety, and to eliminate the consequences of emergency situations.

The rapid quantitative growth of radioelectronic facilities (RES), the improvement of existing ones and the need to organize new networks pose the objective of rational use of the frequency resource and ensuring the interaction of units operating in different ranges.

In addition, due to the problems of electromagnetic compatibility of radio networks and radio facilities, it becomes necessary to transfer the radio networks of individual CCHs to a new frequency range and, accordingly, change the fleet of radio stations without affecting the operability of operational radio communication networks.

One of the possible ways to solve this problem is to use cross-relays.

A known repeater of a communication system for relaying communication and control signals in the interests of fixed and mobile satellite services (RU 2300840 C2, IPC Н04В 7/185 (2006.01), Н04В 7/00 2006.01, published June 10, 2007).

The known repeater is intended for use in communication and control systems for transmitting command information and measuring motion parameters, while increasing the throughput of the communication channel and the accuracy of synchronization. The repeater is used in satellite communication systems and is not intended to organize the interaction of subscribers of mobile radio networks operating in the VHF and UHF frequency bands.

Known mobile communication center for multifunctional purposes, which is used for organizing direct communications, linking subscribers of mobile objects to public communication networks and transmitting various information through established communication channels in the interests of employees of internal affairs bodies. The mobile communication center introduced two transportable UHF radio stations with automobile antennas, a UHF range repeater with a stationary antenna, two VHF portable radios with automobile antennas, a VHF range repeater with a stationary antenna, and a telescopic mast for installing UHF and VHF repeater antennas on it , a signal-loud-speaking device (SSU) with a control panel and a driver’s workplace equipped in the car’s cabin (RU 2407150 C1, IPC Н04В 7/00 (2006.01), published on October 20, 2012).

The well-known node allows you to increase the efficiency of establishing connections and maintaining connections, improve the quality of customer service by providing full access to switching channels.

However, in practice, it is often required to organize the interaction of several radio networks, including the interaction of radio networks of single-frequency and two-frequency simplex of SSN units operating in different bands, as well as the radio communication network of the duty part of SSN units. The known device does not provide the organization of such an interaction.

The objective of the invention is the creation of a cross-repeater that provides the interaction of radio networks of single-frequency and dual-frequency simplex of SSN units operating in different ranges, as well as a circular communication radio network of the duty unit of SSN units.

The technical result from the use of the invention is the expansion of the possibility of using industrially produced repeaters for organizing the interaction of several radio networks operating in different frequency ranges.

The technical result is achieved by the fact that the cross-relay for organizing the interaction of radio networks of single-frequency and dual-frequency simplex operating in two different frequency ranges and a radio communication network of circular communication, contains two pairs of simplex radio stations, an interface including multi-input adders, two for each radio station, with one pair simplex radio stations operate in one frequency range, and the second pair in a different frequency range, while the mentioned radio stations in each pair through a duplex filter are connected to a common antenna of their range and operate at mismatched frequencies of this range, in each pair of multi-input adders corresponding to one of the radio stations, the output of one of the two multi-input adders is connected to the submodulator of this radio station, and the output of the second multi-input adder of this pair is connected to the control input of the transmitter of that radio stations, and the inputs of the aforementioned first multi-input adder in each pair are connected to the low-frequency outputs of the receivers of three other radio stations, and the inputs of of the cited second multi-input adders in each pair are connected to the outputs of the noise suppressors of three other radio stations.

Pairs of simplex radio stations can operate in the bands, respectively, 160 MHz and 460 MHz.

In FIG. 1 is an electrical functional diagram of a cross relay; in FIG. 2 is a block diagram of an internal interaction of cross-relay radio stations; in FIG. 3 is a block diagram of the interaction of radio networks using a cross-relay.

The cross-relay includes a pair of radio stations 1, 2, operating in the same band, for example 450 MHz, which corresponds to the frequency band 450 ÷ 470 MHz, and, in particular, at frequencies of 450 MHz and 460 MHz, respectively. Radio stations 1, 2 through a duplex filter 3 are connected to antenna 4 of the 450 MHz band, respectively.

Another pair of radio stations 5, 6, operates in the range, for example 160 MHz, which corresponds to the frequency band 146 ÷ 174 MHz, and, in particular, at frequencies of 172 MHz and 148 MHz respectively. Radio stations 5, 6 through a duplex filter 7 are connected to the antenna 8 of the 160 MHz band, respectively.

Duplex filters provide the operation of transmitters and receivers of radio stations on a common antenna. The input and output impedances of the filters are 50 ohms.

Radio stations 1, 2, 5, 6 can be equivalent multimedia digital radio modules made using SDR technology (software-controlled radio, which provide cross-relay operation in both 160 MHz and 460 MHz ranges).

Radio stations 1, 2, 5, 6 are connected to the power supply unit 9. The power supply unit 9 is designed to provide power to the components of the cross-relay from an alternating current network of 220 V or from an external battery of 12 V.

Between themselves, the radio stations are connected by interface 10, which contains multi-input adders, two for each radio station. Namely, the multi-input adders 11, 12 correspond to the radio stations 1, the multi-input adders 13, 14 to the radio stations 2, the multi-input adders 15, 16 to the radio stations 5, and the multi-input adders 17, 18 to the radio stations 6.

The low-frequency output 19 of the receiver of each of the aforementioned radio stations is connected via respective adders to the input of the transmitter submodulator 21 of each of the three other radio stations.

So, the low-frequency output 19 of the receiver of the radio station 1 is connected to the input of the submodulator 21 of the transmitter of the radio station 2 through the adder 13, the input of the submodulator 21 of the transmitter of the radio station 5 through the adder 15 and the input of the submodulator 21 of the transmitter of the radio station 6 through the adder 17.

The low-frequency output 19 of the receiver of the radio station 2 is connected to the input of the submodulator 21 of the transmitter of the radio station 1 through the adder 11, the input of the submodulator 21 of the transmitter of the radio station 5 through the adder 15 and the input of the submodulator 21 of the transmitter of the radio station 6 through the adder 17.

The low-frequency output 19 of the receiver of the radio station 5 is connected to the input of the submodulator 21 of the transmitter of the radio station 6 through the adder 17, the input of the submodulator 21 of the transmitter of the radio station 1 through the adder 11 and the input of the submodulator 21 of the transmitter of the radio station 2 through the adder 13.

The low-frequency output 19 of the receiver of the radio station 6 is connected to the input of the submodulator of the transmitter of the radio station 5 through the adder 15, the input of the submodulator of the transmitter of the radio station 1 through the adder 11 and the input of the submodulator of the transmitter of the radio station 2 through the adder 13.

The output of the squelch 20 of each of the radio stations is connected through the respective adders to the control input 22 of the transmitter of each of the three other radio stations.

So, the output of the squelch 20 of the radio station 1 is connected to the control input 22 of the transmitter of the radio station 2 through the adder 14, the control input 22 of the transmitter of the radio station 5 through the adder 16 and the control input 22 of the transmitter of the radio station 6 through the adder 18.

The output of the squelch 20 of the radio station 2 is connected to the control input 22 of the transmitter of the radio station 1 through the adder 12, the control input 22 of the transmitter of the radio station 5 through the adder 16 and the control input 22 of the transmitter of the radio station 6 through the adder 18.

The output of the squelch 20 of the radio station 5 is connected to the control input 22 of the transmitter of the radio station 2 through the adder 14, the control input of the transmitter 22 of the radio station 5 through the adder 16 and the control input of the transmitter of the radio station 6 through the adder 18.

The output of the squelch 20 of the radio station 6 is connected to the control input 22 of the transmitter of the radio station 5 through the adder 16, the control input 22 of the transmitter of the radio station 1 through the adder 12 and the control input of the transmitter of the radio station 2 through the adder 14.

The algorithm of the cross-relay is as follows.

When a radio frequency network subscriber reaches the subscriber’s two-frequency simplex (line 23), the radio receiver 2 (450 MHz) of the repeater receives the signal and transmits it from the low-frequency output to the transmitter submodulator of radio station 1 (460 MHz) and radio transmitter 5 submodulator (172 MHz). The radio transmitters are activated and the signal of the subscriber of the emergency network is broadcast both in the emergency network and in the emergency network. When a single-frequency simplex simplex simplex network is transmitted to the subscriber’s transmission (line 24), the receiver of the radio station 5 receives a signal and transmits it from the low-frequency output to the submodulator of radio station 1. The transmitter of the radio station 1 is activated, and the signal of the subscriber of the SFN radio network is transmitted to the emergency radio network.

When transmitting a circular message, it is received by the radio station 6 (line 25), the signal is transmitted from the low-frequency output of the receiver to the submodulators of the radio stations 1 and 5, respectively. The transmitters of the radio stations are activated and the circular message is broadcast on the radio networks of the SFN and DFS.

Thus, the cross-relay allows you to combine several radio networks (SFN and DFS) operating in different frequency ranges, as well as a warning radio network (transmitting circular messages) of the special unit on duty. The alert radio network is the main radio network of the communication system, therefore, the transmission of circular messages is a priority. When transmitting circular messages, the broadcast of other messages from subscribers of the radio networks of the Emergencies and Emergency Situations is terminated (for the entire duration of the transmission of the circular message).

The cross-relay combines the 160 MHz MNF radio network and the 450 MHz DFN radio network. Such a construction of the repeater is explained by the operation of most special service radio networks in the emergency mode in the range of exactly 160 MHz, and in the emergency mode in the 450 MHz range.

The radio communication network of the call center on duty allows you to simultaneously activate all the main radio networks of special forces and send them a circular message. The peculiarity of building a circular communication network is that the coverage area of the radio networks remains the same as when the subscribers communicate with each other.

Claims (2)

1. A cross-relay for organizing the interaction of single-frequency and dual-frequency simplex radio networks operating in two different frequency ranges and a circular communication radio network, characterized in that it contains two pairs of simplex radio stations, an interface containing multi-input adders, two for each radio station, one pair simplex radio stations operate in one frequency range, and the second pair in a different frequency range, while the mentioned radio stations in each pair are connected to the common via a duplex filter it has an antenna of its range and operate at non-coincident frequencies of this range, in each pair of multi-input adders corresponding to one of the radio stations, the output of one of the two multi-input adders is connected to the submodulator of this radio station, and the output of the second multi-input adder of this pair is connected to the control input of the transmitter of the same radio station moreover, the inputs of the aforementioned first multi-input adder in each pair are connected to the low-frequency outputs of the receivers of three other radio stations, and the inputs of the second x multi-input combiners in each pair are connected to the noise canceling outputs of three other radio stations. 2. The repeater according to claim 1, characterized in that the pairs of simplex radio stations operate in the ranges of 160 MHz and 460 MHz, respectively.

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