RU2389629C1 - Data transmission system based on dect standard radio channel - Google Patents

Abstract

FIELD: physics, communications.

SUBSTANCE: invention relates to telecommunication engineering, mainly to digital communication, and can be used on railway transport for transmitting data between stationary and mobile objects of information control systems and simultaneous communication. The data transmission system based on a DECT standard radio channel has a stationary control unit on a centralised power system post, with the input of the said stationary control unit connected to the control complex of the centralised power system post while the standby output is connected to the input of a standby radio-frequency modem. The high frequency output of the radio-frequency modem is connected to an antenna. On a shunting locomotive, the system consists of an onboard control unit and a standby radio-frequency modem whose high frequency output is connected to an antenna and the signal output to the standby input of the onboard control unit, the output of which is designed for connection to the actuating unit of the shunting locomotive. On the centralised power system post there is a communication switch, a modem, a computer mounted on the automated workstation of the operator, series-connected DECT base station controller and DECT base station multiplexer, outputs of which are connected to signal inputs of the DECT base radio stations. On the shunting locomotive there is an onboard DECT radio station, as well as a portable DECT user handset.

EFFECT: invention broadens functional capabilities of the system.

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Description

The invention relates to techniques for telecommunications, mainly digital communications, and can find application in railway transport for data transmission between stationary and mobile objects of information-control systems and at the same time negotiating.

A known system for transmitting and processing information for an automated tracking system on the railway, containing an information transport network, including computers that collect and summarize data for transmission to a control center and receive data from a control center, as well as a computer data processing network (RU 2294298, B61L 25/02, 07/27/07). The disadvantage of this system is the low data rate to the control room.

A known system of automatic automatic locomotive signaling using a radio channel, consisting of a subsystem of on-duty equipment and a subsystem of on-board equipment, the information exchange between which is carried out via a radio channel (RU 2303542, B61L 25/04, 07/27/07). The disadvantage of this system is the low bandwidth of the radio channel.

A known mobile communication system with an architecture supporting the use of "functional numbers" for addressing purposes in a wireless communication network, and means of transmitting "functional numbers" between

appropriate wireless communication devices (EP 1 860 893 A 2, H04Q 7/22, 11.28.07). The disadvantage of this system is the complexity of creating an architecture that supports the use of "functional numbers" for addressing purposes in a wireless communication network.

The closest system is a railway communication system containing a stationary control unit at the electric centralization station, the input of which is connected to the control complex of the electric centralization station, and the backup output is connected to the input of the backup radio modem, the high-frequency output of which is connected to the antenna, on-board control unit on each shunting locomotive and a backup radio modem, the high-frequency output of which is connected to the antenna, and the signal output - with the backup input of the onboard control unit Ia, the output of which is coupled to the execution unit shunting locomotive (RU 2312783, B61L 27/02, 20.12.07). The disadvantages of this system are the lack of possibility during the transmission of these negotiations between persons engaged in shunting movements at the railway station, as well as the lack of centralized monitoring and administration of equipment.

The technical result of the invention is to expand the functionality of the system, which allows for data transfer to simultaneously negotiate between persons performing shunting movements at the railway station, as well as in centralized monitoring and administration of equipment.

The technical result is achieved in that in a data transmission system based on a radio channel of the DECT standard, which contains a stationary control unit at the electric centralization station, the input of which is connected to the control complex of the electric centralization station, and the backup output is connected to the input of the backup radio modem, the high-frequency output of which is connected to the antenna , on each shunting locomotive, an onboard control unit and a backup radio modem, the high-frequency output of which is connected to the antenna, and the signal output to the backup according to the invention, an operational-technological communication switch, an information modem, an electronic-computing device installed on an automated workstation of an operator, and a base station controller connected in series to the centralization control unit, the output of which is intended to be connected to the actuator unit of a shunting locomotive, according to the invention DECT and DECT base station multiplexer, the outputs of which are connected to the signal inputs of DECT radio base stations, high the near-frequency outputs of which are connected to the antennas, the first and second signal inputs, the information and control outputs of the controller of the DECT base stations, are connected, respectively, to the main output of the stationary control unit, the output of the operational-technological communication switch, the input of the electronic computing device and the first input of the information modem the second input of which is connected to the information output of the backup radio modem, and the output is connected to the monitoring and administration channel, the input of the opera switch of technological communication is connected to the channel of technological communication, on the shunting locomotive, an on-board radio station DECT is introduced, the high-frequency, signal and line outputs of which are connected, respectively, to the antenna, the input of the on-board control unit and the mobile subscriber tube DECT, and a portable subscriber tube is also introduced DECT.

The drawing shows the proposed data transmission system based on the DECT standard radio channel.

The data transmission system based on the radio channel of the DECT standard contains a stationary control unit 1 at the electric centralization station, the input of which is connected to the control complex of the electric centralization station, and the backup output is connected to the input of the backup radio modem 2, the high-frequency output of which is connected to the antenna, is installed on each shunting locomotive the onboard control unit 3 and the backup radio modem 4, the high-frequency output of which is connected to the antenna, and the signal output is with the backup input of the onboard unit 3 An outlet whose output is intended for connecting a shunting locomotive to the executive unit, an operational-technological communication switch 5, an information modem 6, an electronic computing device 7 installed at the operator’s workstation, and a controller 8 of DECT base stations are connected in series to the centralization station multiplexer of 9 DECT base stations, the outputs of which are connected to the signal inputs of 10 DECT base radio stations, the high-frequency outputs of which are connected to the ant us, and the first and second signal inputs, information and control outputs of the controller 8 of the DECT base stations are connected, respectively, with the main output of the stationary control unit 1, the output of the switch 5 operational-technological communication, the input of the electronic computing device 7 and the first input of the information modem 6 the second input of which is connected to the information output of the backup radio modem 2, the output of which is connected to the monitoring and administration channel, and the input of the switch 5 of the operational-technological communication and connected to the channel of operational-technological communication, an on-board radio station 11 DECT is introduced on the shunting locomotive, the high-frequency, signal and linear outputs of which are connected, respectively, to the antenna, the input of the on-board control unit 3 and the portable subscriber tube 12 DECT, and a wearable subscriber tube is also introduced 13 DECT.

A data transmission system based on a radio channel of the DECT standard works as follows.

Previously, as a result of the inspection of the territory of the railway station, the entire control zone is divided into the required number of sections based on the restrictions on radio coverage.

In the normal operating mode in the active control mode of shunting locomotives, the radio exchange between the electric centralization station and the locomotives is carried out on the main radio channel through the controller of 8 DECT base stations, a multiplexer of 9 DECT base stations, 10 DECT base radios and 11 DECT on-board radio station. The stationary control unit 1 also receives information from the onboard control unit 3 of the shunting locomotive through the backup radio modem 4 and the backup radio modem 2 via the backup radio channel. After each exchange cycle, the data obtained through the primary and backup radio channels is compared, and the results of eight cycles make a conclusion about the health of the radio channels. In the event of a clear deterioration in the operation of the main radio channel, the stationary control unit 1 automatically switches to the hot standby mode. At the same time, an appropriate entry is made in the system operation protocol. Reverse switching occurs in a similar way.

The DECT standard is based on digital radio data transmission between 10 DECT radio base stations and 11 DECT airborne radio station using time division multiple access technology. Fully duplex communication is provided using temporary duplexing. The range of radio frequencies used for reception and transmission is 1880-1900 MHz. The operating range (20 MHz) is divided into 10 radio channels, each of 1.728 MHz. Information is exchanged in frames in such a way that with the help of time division, 24 time slots are created in each frame, which provide 12 duplex channels for receiving and transmitting speech signals. When establishing a connection for the reception and transmission of speech signals, 2 out of 24 time slots in each frame are used: one for transmission and one for reception.

The controller of 8 DECT base stations through a multiplexer of 9 DECT base stations constantly polls 10 DECT base radios, choosing the best available channel for communication in the process of continuous dynamic channel selection. Due to this, the on-board radio station 11 DECT, the on-board control unit 3 and the portable subscriber tube 12 DECT operate when moving from the coverage area of one base station 10 DECT to another, and the transition is carried out without loss of data and voice quality. The search for the best channel occurs not only at the time of establishing a connection, but continues during data transfer. The controller of 8 DECT base stations monitors available channels most of the time, rather than receiving and transmitting data and speech. The controller of 8 DECT base stations provides a junction of DECT equipment with a switch 5 operational-technological communication, controls the base radio stations 10 DECT and ensures the functioning of the network. The controller 8 of the DECT base stations from the electronic computing device 7 installed on the operator’s workstation is controlled via an Ethernet 10/100 network, a dedicated line (RS-232) or a dial-up line (via modem).

The multiplexer of 9 DECT base stations serves to control several DECT 10 radio base stations on a single interface line from the controller of 8 DECT base stations, ensuring their coordinated interaction in the system with a large number of base stations. Multiplexers of 9 DECT base stations are designed to separate, combine and convert the E1 stream from the controller of 8 DECT base stations containing 30 V channels into 16 Upn streams with 2 V channels each. Thus, sixteen DECT base stations 10 can be connected to one multiplexer of 9 DECT base stations.

The electronic computing device 7, installed on the operator’s automated workstation, is designed to provide the operator with system management (system configuration, registration, statement, changing access rights for subscribers), maintenance and equipment diagnostics.

The on-board radio station 11 DECT is designed to provide radio access for fixed users to the base radio stations 10 DECT.

The DECT radio communication system monitoring and administration system operates on the basis of the SNMP protocol and solves the following tasks: managing network configuration and naming (remote determination of network addresses, identifiers, geographic location, etc.), error handling (identifying, identifying and eliminating the consequences of failures and failures), performance and reliability analysis (traffic intensity, probability of data corruption, etc.), security management (user authentication) and network operation accounting (time I have a network of resources). The monitoring system and equipment control system of the DECT radio communication system is based on the interaction scheme agent (base station controller) and manager (AWP of the radio operator of a unified monitoring and administration system). The information modem 6 receives information about the monitoring of the controller 8 of the DECT base stations and the backup radio modem 2 and sends it to a single monitoring and administration system.

Wearable subscriber tube 13 DECT, available from the train compiler, is designed to negotiate (in accordance with the shunting technology) negotiations with the shunting locomotive driver through the transportable subscriber tube 12.

The technical result of the proposed technical solution lies in the fact that, simultaneously with high-speed data transmission, negotiations between shunting locomotive drivers and compilers, as well as dispatchers and other operational workers via the operational-technological communication channel are possible. In addition, the system provides remote monitoring and administration of equipment, which increases the reliability of its operation.

Claims (1)

A data transmission system based on a radio channel of the DECT standard, which contains a stationary control unit at the electric centralization station, the input of which is connected to the control complex of the electric centralization station, and the backup output is connected to the input of the backup radio modem, whose high-frequency output is connected to the antenna, on-board unit on each shunting locomotive control and backup radio modem, the high-frequency output of which is connected to the antenna, and the signal output - with the backup input of the onboard control unit, output which is designed to connect to the executive unit of a shunting locomotive, characterized in that at the electric centralization station, an operational-technological communication switch, an information modem, an electronic computing device installed on the operator’s workstation, a DECT base station controller and a base station multiplexer are introduced DECT, the outputs of which are connected to the signal inputs of the base DECT radio stations, the high-frequency outputs of which are connected to the ant moreover, the first and second signal inputs, the information and control outputs of the controller of the base stations of the DECT are connected respectively to the main output of the stationary control unit, the output of the switch of the operational-technological communication, the input of the electronic computing device and the first input of the information modem, the second input of which is connected to the information the output of the backup radio modem, and the output is connected to the monitoring and administration channel, the input of the operational-technological communication switch is connected to the channel scrap of operational-technological communication, the DECT airborne radio station was introduced on the shunting locomotive, the high-frequency, signal and line outputs of which are connected respectively to the antenna, the input of the airborne control unit and the portable DECT subscriber tube, and a portable DECT subscriber tube is also introduced.