CN117641284A - Relay system, communication method and train wireless communication system for train communication - Google Patents

Abstract

The application provides a relay system, a communication method and a train wireless communication system for train communication, and relates to the technical field of communication equipment, wherein the relay system comprises: the system comprises a plurality of relay devices, a plurality of relay units and a plurality of control units, wherein adjacent relay devices in the plurality of relay devices are networked through Ethernet; the relay devices are respectively used for monitoring first service instruction data of the train tail machine platform, forwarding the first service instruction data to the train tail host when any relay device monitors the first service instruction data, synchronizing the first service instruction data to adjacent relay devices of the relay devices based on the Ethernet, and enabling the relay devices and the adjacent relay devices thereof to cooperatively forward the first service instruction data to the train tail host. The method and the device can enlarge the relay communication range, and effectively solve the problems that communication of the train tail device is unstable and train running safety is affected.

Description

Relay system, communication method and train wireless communication system for train communication

Technical Field

The present disclosure relates to the field of communications devices, and in particular, to a relay system, a communication method, and a wireless train communication system for train communication.

Background

The train tail device, namely the train tail safety protection device, mainly comprises a train tail machine platform and a train tail host machine, and is used for realizing the functions of inquiring the wind pressure of a train tail main wind pipe by a train driver, controlling the auxiliary exhaust braking of the train tail host machine and the like.

Currently, the train tail device mainly adopts a GSM-R (Global System for Mobile Communications-Railway) and 400MHz digital dual-mode communication mode. On lines not covered by the GSM-R network, the tail-row communication is mainly point-to-point communication between the tail-row station and the tail-row host device in a 400MHz digital mode. However, as the number of the train groups increases, or when the train runs in wireless weak sites such as tunnels, mountain areas and the like, the wireless communication of the train tail device of the train is unstable, which causes that a driver may not be able to inquire the wind pressure of the main wind pipe at the tail of the train through the train tail device, control the auxiliary exhaust braking of the main machine at the tail of the train and the like, thereby affecting the driving safety of the train.

Disclosure of Invention

The application provides a relay system, a communication method and a train wireless communication system for train communication, which are used for solving the problem that the communication of a train tail device is unstable and the running safety of a train is affected.

In order to achieve the above object, the present application provides the following technical solutions:

according to a first aspect of the present application, there is provided a relay system for train communication, including a plurality of relay devices, adjacent relay devices among the plurality of relay devices being networked by ethernet;

the relay devices are respectively used for monitoring first service instruction data of the train tail machine platform, forwarding the first service instruction data to the train tail host when any relay device monitors the first service instruction data, synchronizing the first service instruction data to adjacent relay devices of the relay devices based on the Ethernet, and enabling the relay devices and the adjacent relay devices thereof to cooperatively forward the first service instruction data to the train tail host;

and/or the number of the groups of groups,

the relay devices are respectively used for monitoring second service instruction data of the train tail host, forwarding the second service instruction data to the train tail locomotive platform when any relay device monitors the second service instruction data, synchronizing the second service instruction data to adjacent relay devices of the relay devices based on the Ethernet, and enabling the relay devices and the adjacent relay devices thereof to cooperatively forward the second service instruction data to the train tail locomotive platform.

In one embodiment, the relay system further comprises:

the network management center is electrically connected with the plurality of relay devices through data transmission links and is used for storing the first service instruction data and/or the second service instruction data and the data synchronization messages among the plurality of relay devices;

and/or the network management center is configured to configure the plurality of relay devices into odd relay devices and even relay devices according to different time sequences of the first service instruction data transmission or the second service instruction data reception, and configure identifiers for the odd relay devices and the even relay devices respectively, wherein when the first service instruction data or the second service instruction data is monitored to be the odd relay devices, the identifiers of the adjacent even relay devices are queried according to the identifiers of the odd relay devices, and the first service instruction data is synchronized to the corresponding even relay devices based on the Ethernet and the identifiers, so that the cooperative forwarding of the first service instruction data is realized.

In one embodiment, the relay system further comprises:

the maintenance equipment is electrically connected with the relay equipment and comprises a transmitting end and/or a receiving end; wherein,

The transmitting end is used for simulating and transmitting first service instruction data of the train tail machine, and judging whether the forwarding function of the relay equipment is normal or not according to consistency between the first service instruction data and the first service instruction data forwarded by the corresponding relay equipment; and/or the receiving end is used for simulating and receiving the second service instruction data of the train tail host, and judging whether the forwarding function of the relay equipment is normal or not according to the consistency between the second service instruction data and the second service instruction data forwarded by the corresponding relay equipment.

In one embodiment, the plurality of relay devices are respectively connected to the data transmission links, so that ethernet networking is realized between the adjacent relay devices through the data transmission links.

In one embodiment, the relay device is a 400MHz ground relay station, the 400MHz ground relay station includes a main control board, and a power supply unit, a digital channelizer, an ethernet switch, and a radio frequency unit electrically connected to the main control board, respectively,

the main control board is used for controlling the operation of the power supply unit, the digital channel machine, the Ethernet switch and the radio frequency unit;

The power supply unit is used for supplying power to the 400MHz ground relay station;

the radio frequency unit is used for transmitting and distributing wireless radio frequency signals;

the digital channel machine is used for receiving and extracting digital wireless signals under the coverage of the wireless radio frequency signals, and generating and transmitting the digital wireless signals so as to enable the 400MHz ground relay station to forward the first service instruction data to a train tail host or forward the second service instruction data to a train tail machine;

the Ethernet switch is used for realizing Ethernet communication between the 400MHz ground relay station and other 400MHz ground relay stations.

In one embodiment, the 400MHz terrestrial repeater further comprises: a combiner electrically connected with the radio frequency unit;

the combiner is respectively and electrically connected with an external leaky cable and the repeater and is used for sharing the leaky cable after being combined with the repeater so as to realize the coverage of the wireless radio frequency signals.

According to a second aspect of the present application, there is provided a communication method applied to a relay system including a plurality of relay devices, adjacent ones of the plurality of relay devices being networked by ethernet, the method comprising:

If any one of the plurality of relay devices monitors first service instruction data of a train tail machine, the relay device monitoring the first service instruction data forwards the first service instruction data to a train tail machine, and the first service instruction data is synchronized to adjacent relay devices based on the Ethernet;

the adjacent relay equipment of the relay equipment cooperatively forwards the first service instruction data to the tail-row host;

and/or the number of the groups of groups,

if any one of the plurality of relay devices monitors second service instruction data of the train tail host, the relay device monitoring the second service instruction data forwards the second service instruction data to a train tail host, and the second service instruction data is synchronized to adjacent relay devices based on the Ethernet;

and the adjacent relay equipment of the relay equipment cooperatively forwards the second service instruction data to the train tail machine platform.

In one embodiment, after any one of the relay devices monitors the first service instruction data of the train tail machine, and before the relay device synchronizes the first service instruction data into its adjacent relay device based on the ethernet, the method further comprises:

The relay equipment judges whether a response message corresponding to the first service instruction data is received in a first preset time period, wherein the response message carries third service instruction data sent by the train tail host;

if the response message is not monitored within a first preset time period, executing the steps that the relay equipment forwards the first service instruction data to a train tail machine, and synchronizing the first service instruction data to adjacent relay equipment based on the Ethernet;

or if the response message is monitored within the first preset time period, forwarding the third service instruction data to the train tail locomotive platform within the second preset time period, synchronizing the third service instruction data to adjacent relay equipment based on the Ethernet, and cooperatively forwarding the third service instruction data to the train tail locomotive platform by the adjacent relay equipment.

In one embodiment, the method further comprises:

if any one of the plurality of relay devices monitors the first service instruction data of the train tail machine, and the adjacent relay devices of the relay devices monitor the first service instruction data at the same time, the relay devices do not monitor the response message corresponding to the first service instruction data within a third preset time period;

The relay equipment forwards the first service instruction data to the tail-row host, and synchronizes the first service instruction data to the adjacent relay equipment based on the Ethernet; and after receiving the data synchronization message of the relay device, the adjacent relay device stops monitoring the response message corresponding to the first service instruction data, and cooperatively forwards the first service instruction data to the train tail host.

According to a third aspect of the application, a train wireless communication system is provided, which comprises the relay system and a train tail device wirelessly connected with the relay system, wherein the train tail device comprises a train tail machine platform and a train tail host.

According to the relay system, the communication method and the train wireless communication system for train communication, adjacent relay devices in the relay system are networked through the Ethernet, the adjacent relay devices can communicate and cooperatively sense through the Ethernet, when the relay devices monitor a train tail message, the relay devices synchronize with the adjacent relay devices to cooperatively relay and forward, so that the coverage range of relay data transmission is effectively enlarged, the communication distance between the head device and the tail device of a train is greatly prolonged, and the communication success rate is effectively improved; the relay devices can judge the forwarding logic according to the data synchronization message, so that the wireless relay of the train tail service data is cooperatively forwarded by a plurality of adjacent relay devices through different time sequences, the communication of the train head and the train tail of the train tail device is ensured, and the same-frequency signal interference in the wireless communication among the relay devices is effectively avoided; the relay equipment adopts 400MHz ground relay equipment, and after the relay equipment is combined with external equipment such as a leaky cable, a repeater and the like, the wireless radio frequency signal coverage of an antenna feed completion section such as the leaky cable, an antenna and the like is shared, so that the communication range is enlarged, the hardware cost is reduced, and the problems of high maintenance cost, lower communication success rate and the like when the relay equipment is hung in the middle of a train are solved; in addition, the relay equipment is provided with matched maintenance equipment, so that a special tool for performing test on the on-site relay station is realized, the functional availability and the correctness of the relay equipment can be verified, and the maintenance difficulty of maintenance personnel on the interval relay station is effectively reduced.

Drawings

Fig. 1 is one of schematic structural diagrams of a relay system for train communication according to an embodiment of the present application;

fig. 2 is a second schematic structural diagram of a relay system for train communication according to an embodiment of the present disclosure;

fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present application;

FIG. 4 is a second flow chart of a communication method according to an embodiment of the present disclosure;

FIG. 5 is a third flow chart of a communication method according to an embodiment of the present disclosure;

FIG. 6 is a flow chart of a communication method according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a train wireless communication system according to an embodiment of the present application.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

In the related art, aiming at the problem of difficult communication in a 400MHz wireless communication low-field area scene, taking a railway as an example, the railway is usually solved by erecting and adding relay equipment. One form is that a relay device is erected in a weak field area such as a tunnel, a mountain area and the like, and the relay device forwards data received by the relay device in real time; the other is to install the relay device on the middle vehicle of the train, monitor the data communicated between the locomotive head device and the train tail device, and forward the data in real time. The two modes can increase the wireless communication distance of the equipment between the head part and the tail part of the train in an ideal application scene in a relay mode.

However, the related technology can only solve the communication problem in a simple scene, and in a complex field application scene, the problems of incapability of ensuring the communication success rate, equipment interference, high use difficulty, inconvenient maintenance and the like still exist. The method is mainly characterized in that:

1) At present, train tail relay equipment applied to weak-field sections such as tunnels comprises section relay stations or relays in various forms, the equipment is usually arranged at fixed positions in the railway sections and is in an independent working state, and a single relay equipment judges and forwards received data by itself and cannot be in business logic association with other similar equipment. The result is that when the train consists is too long, or the train head and the train tail are respectively positioned inside and outside the tunnel, or the train head and the train tail are respectively positioned in two continuous different tunnels and the like, the relay equipment cannot effectively ensure the success rate of communication between the train head and the train tail. However, the communication success rate of the train tail device is more dependent in the scenes, and the communication failure can cause an increase in driving safety risk.

2) For traditional interval tail relay equipment, the coverage of the relay can be improved by improving the equipment installation density. However, due to the characteristic that the relay devices independently work, the installation distance of the devices in the field environment is too short, the situation that a plurality of devices receive and forward simultaneously can be generated, and the same-frequency interference problem of signals is caused. This is also a problem that conventional section column tail relay devices cannot solve.

3) For a repeater hung in the middle of a train, the repeater needs to be hung when being grouped each time, and removed when being unwound; and the relay device needs a battery to supply power, which greatly increases the difficulty of use and maintenance and the labor cost. And the repeater hung on the train cannot guarantee the communication success rate in a special weak field zone.

4) The conventional section repeater performs a functional test and a test of emission coverage on the field-installed equipment. The lack of matched test fixture equipment is inconvenient for field maintenance.

In view of this, the embodiments of the present application provide a relay system, a communication method, and a train wireless communication system for train communication, where relay devices in the relay system are networked through an ethernet (IP network), and adjacent relay devices can communicate and cooperatively sense through the ethernet. When the relay equipment monitors the train tail information, the relay equipment can synchronize with the adjacent relay equipment to perform cooperative relay forwarding, so that the coverage range of relay data transmission is effectively enlarged, the communication distance between the head equipment and the tail equipment of the train can be greatly prolonged, and the communication success rate is effectively improved; in addition, the relay devices of the embodiment can judge the forwarding logic according to the data synchronization message together, so that the cooperative forwarding of the wireless relay of the tail business data is realized by the adjacent relay devices through different time sequences, the guarantee is provided for the communication between the head and the tail of the tail device, and the same-frequency signal interference in the wireless communication is effectively avoided; in addition, the relay equipment of the embodiment adopts 400MHz ground relay equipment, and after the relay equipment is combined with external equipment such as a leaky cable, a repeater and the like, the wireless radio frequency signal coverage of an antenna feed completion section such as the leaky cable, an antenna and the like is shared, so that the communication range is enlarged, meanwhile, the hardware cost is reduced, and the problems of high maintenance cost, lower communication success rate and the like when the relay equipment is hung in the middle of a train are solved; in addition, the relay equipment of the embodiment is provided with matched maintenance equipment, so that a special tool for performing test on the on-site relay station is realized, the functional availability and the correctness of the relay equipment can be verified, and the maintenance difficulty of maintenance personnel on the interval relay station is effectively reduced.

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Referring to fig. 1, fig. 1 is a schematic diagram of a relay system 100 for train communication according to an embodiment of the present application, which includes a plurality of relay devices 110, and adjacent relay devices in the plurality of relay devices 110 are networked by ethernet.

Ethernet, a computer network technology, is used to transmit data in a Local Area Network (LAN). It is one of the most common wired lan standards that connects computers, servers, routers, and other network devices via a physical medium (e.g., twisted pair or fiber optic). In this embodiment, an ethernet networking mode is adopted to perform wired network connection on the adjacent relay device, so as to realize wired transmission of data.

In this embodiment, the relay system may be disposed in a railway section of a weak field such as a tunnel, where each relay device is arranged in a front-to-back manner, and ethernet networking is performed between adjacent relay devices, so as to implement data synchronization between the relay devices.

The plurality of relay devices 110 are respectively configured to monitor first service instruction data of a train tail machine, forward the first service instruction data to a train tail host when any relay device monitors the first service instruction data, and synchronize the first service instruction data to adjacent relay devices of the relay devices based on the ethernet, so that the relay devices and the adjacent relay devices thereof cooperatively forward the first service instruction data to the train tail host; and/or, the plurality of relay devices 110 are respectively configured to monitor second service instruction data of the tail-row host, and when any relay device monitors the second service instruction data, forward the second service instruction data to the tail-row host, and synchronize the second service instruction data to adjacent relay devices of the relay devices based on the ethernet, so that the relay devices and the adjacent relay devices thereof cooperatively forward the second service instruction data to the tail-row host.

In this embodiment, the relay device may be a relay station or a relay, and the main function is to implement a relay forwarding function for service instruction data of the tail-row device. And by monitoring the frequency points of service communication between the train tail machine platform and the train tail host, carrying out complete data analysis on CSBK frames in the monitored data through a train tail service protocol (communication data between train tail devices are carried by the CSBK frames). And carrying out relay forwarding processing on the tail business data according to the business instruction type.

In this embodiment, the first service instruction data is instruction data sent by the train tail machine platform, which is instruction data sent by the train tail machine main body, and may be an instruction such as an inquiry instruction or a control instruction, for example, an instruction for inquiring the wind pressure of the train tail main wind pipe, or an instruction for controlling the train tail main body to assist in exhaust braking; the second service instruction data is instruction data sent by the train tail host, and may be response instruction data after receiving the instruction data sent by the train tail locomotive platform and executing the response instruction data, for example, after receiving a query instruction sent by the train tail locomotive platform, feedback corresponding state data, or train tail operation instruction data or alarm instruction data sent by the train tail locomotive platform actively. In addition to the above-mentioned service instruction data, the first service instruction data and the second service instruction data may be other instructions, which are not particularly limited in this embodiment.

In this embodiment, when the relay device monitors the corresponding service instruction data, the relay device not only forwards the corresponding service instruction data to the corresponding tail device, but also synchronizes the service instruction data to the adjacent relay device, and the adjacent relay device can perform cooperative forwarding of data according to the service instruction data transmitted by the relay device, where the adjacent relay device receives the service instruction data synchronized by the relay device and forwards the service instruction data, and there is a certain time delay in the forwarding process of the service instruction data, and signal interference between the relay devices is generally not caused. In addition, the adjacent relay equipment can also adopt a mode of forwarding different time sequences from the relay equipment in the cooperative forwarding process based on the received service instruction data of the relay equipment so as to further reduce the problems of common-frequency interference and the like of signals.

In the process, the relay devices in the relay system are networked through the Ethernet, and the adjacent relay devices can communicate and cooperatively sense through the Ethernet. When the relay equipment monitors the train tail information, the relay equipment can synchronize with the adjacent relay equipment to perform cooperative relay forwarding, so that the coverage range of relay data transmission is effectively enlarged, the communication distance between the head equipment and the tail equipment of the train can be greatly prolonged, and the communication success rate is effectively improved; in addition, the relay devices of the embodiment can judge the forwarding logic according to the data synchronization message together, so that the cooperative forwarding of the wireless relay of the tail service data is realized by the adjacent relay devices through different time sequences, the guarantee is provided for the communication between the head and the tail of the tail device, and the same-frequency signal interference in the wireless communication is effectively avoided.

In a preferred embodiment, in order to facilitate management of the relay system to further improve the relay communication efficiency, referring to fig. 2, the relay system provided in this embodiment further includes a network management center 120,

the network management center 120 is electrically connected with the plurality of relay devices 110 through the data transmission link 130, and may be used to store the first service instruction data and/or the second service instruction data, and the data synchronization message between the plurality of relay devices;

further, the network management center 120 may be further configured to configure the plurality of relay devices as an odd relay device and an even relay device according to different timing sequences of the first service instruction data transmission or the second service instruction data reception, and configure identifiers for the odd relay device and the even relay device, where when the first service instruction data or the second service instruction data is monitored that the relay device is the odd relay device, the identifiers of the adjacent even relay devices are queried according to the identifiers of the odd relay devices, and the first service instruction data is synchronized to the corresponding even relay device based on the ethernet and the identifiers, so as to implement cooperative forwarding of the first service instruction data.

In this embodiment, the data transmission link may be an IP communication network based on a railway transmission network, so as to implement network data exchange between the relay device and the network management center, and further, may also implement network data exchange between the relay device and the relay device.

In this embodiment, the identifier may be labeled in a serial number manner, so as to distinguish each relay device, and improve the cooperative forwarding efficiency between the relay devices.

In this embodiment, the network management center includes a network management server, a network switch and a network management terminal, where the network management center stores all original train tail service data analyzed by the monitoring of the relay station in the railway section, and the network management system records and stores all processing actions such as wireless data receiving, wireless relay transmitting, network instruction synchronizing, synchronous instruction receiving, and the like performed by the relay station. The network management server realizes functions of configuration management, alarm management, data management and the like of the relay station equipment in the system, the network switch realizes a network receiving function, and railway managers can check railway communication states, train tail running states and the like by utilizing the network management terminal.

Further, the plurality of relay devices 110 are respectively connected to the data transmission links 130, so that ethernet networking between adjacent relay devices is realized through the data transmission links 130.

In this embodiment, a cooperative relay function is provided between relay devices, when the relay devices determine that forwarding of line-tail service data is required, the relay devices wirelessly transmit data signals, and simultaneously synchronize the service data to front and rear relay devices adjacent to each other through a wired ethernet, and after receiving and synchronizing data processing, the front and rear relay stations wirelessly transmit data in a relay manner. The communication distance of the train tail device forwarded by the relay system can be more than 4kM, and the success rate of train tail communication is greatly improved.

Further, considering the repeater hung in the middle of the train, the repeater needs to be hung in each grouping and removed in the unbinding process, and the repeater needs to be powered by a battery, which greatly increases the difficulty of use and maintenance and the labor cost. And the repeater hung on the train cannot guarantee the communication success rate in a special weak field zone. The relay device in this embodiment is a 400MHz ground relay station, the 400MHz ground relay station includes a main control board, and a power supply unit, a digital channel machine, an ethernet switch and a radio frequency unit which are electrically connected with the main control board, respectively, wherein,

The main control board is used for controlling the operation of the power supply unit, the digital channel machine, the Ethernet switch and the radio frequency unit; the power supply unit is used for supplying power to the 400MHz ground relay station; the radio frequency unit is used for transmitting and distributing wireless radio frequency signals; the digital channel machine is used for receiving and extracting digital wireless signals under the coverage of the wireless radio frequency signals, and generating and transmitting the digital wireless signals so as to enable the 400MHz ground relay station to forward the first service instruction data to a train tail host or forward the second service instruction data to a train tail machine; the Ethernet switch is used for realizing Ethernet communication between the 400MHz ground relay station and other 400MHz ground relay stations.

It will be appreciated that the ground relay station in this embodiment is a relay device built on the ground (e.g. a railway section). Compared with the relay station in the related art, the relay station in the embodiment includes an ethernet switch and a radio frequency unit, and the radio frequency unit is utilized to realize wireless forwarding of service instruction data, and the ethernet switch realizes wired instruction data synchronization between the relay stations.

Further, considering that the railway section usually includes a leaky cable and a (optical fiber) repeater to realize coverage of wireless signals, in order to reduce the hardware cost of the relay system, the embodiment can realize integrated design with external network coverage equipment by arranging a combiner. Specifically, the 400MHz ground relay station in this embodiment may further include: a combiner electrically connected with the radio frequency unit;

the combiner is respectively and electrically connected with an external leaky cable and the repeater and is used for sharing the leaky cable after being combined with the repeater so as to realize the coverage of the wireless radio frequency signals.

In this embodiment, the relay station is mainly composed of internal components such as a main control unit, a power supply unit, a digital channel machine, an ethernet switch, and a radio frequency unit. And after the wireless radio frequency signal coverage of the antenna feed completion section such as the leaky cable and the antenna is shared after the wireless radio frequency signal coverage is combined with equipment such as an external repeater, leaky cable monitoring and the like, the hardware cost can be effectively reduced.

In a preferred implementation manner, the present embodiment further considers that the existing relay device in the railway section is inconvenient to maintain, and has high labor cost, and the relay system in the present embodiment further includes:

The maintenance equipment is electrically connected with the relay equipment and comprises a transmitting end and/or a receiving end; wherein,

the transmitting end is used for simulating and transmitting first service instruction data of the train tail machine, and judging whether the forwarding function of the relay equipment is normal or not according to consistency between the first service instruction data and the first service instruction data forwarded by the corresponding relay equipment; and/or the receiving end is used for simulating and receiving the second service instruction data of the train tail host, and judging whether the forwarding function of the relay equipment is normal or not according to the consistency between the second service instruction data and the second service instruction data forwarded by the corresponding relay equipment.

In this embodiment, the maintenance device may be developed by using a digital handheld (Digital Mobile Radio, DMR) device principle, and may simulate service instruction data (e.g. CSBK data frames) of the train tail machine platform and the train tail host respectively. The transmitting end simulates the wireless service data transmission of the train tail device, and the receiving end analyzes and identifies the received data. After receiving the data, the original data simulated by the transmitting end or the relay data processed by the relay station can display the service type of the data and the transmitting source of the marked data at the receiving end. The functional availability and the correctness of the relay station to be tested can be accurately judged.

In one implementation, the maintenance equipment can also enter a long transmission mode of a field intensity test according to the transmission time required in the instruction after the relay station identifies the instruction by transmitting a CSBK data frame instruction of a specific protocol to the relay station, so that the maintenance personnel can conveniently carry out the signal field intensity coverage test of the equipment. The maintenance difficulty of maintenance personnel on the interval relay station is greatly reduced.

Referring to fig. 3, fig. 3 is a schematic flow chart of a communication method provided in the embodiment of the present application, where the communication method may be applied to the above-mentioned relay system, the relay system includes a plurality of relay devices, adjacent relay devices in the plurality of relay devices are networked through ethernet, and the method may include steps S301 to S304.

Step 301, if any one of the plurality of relay devices monitors first service instruction data of a train tail machine, the relay device that monitors the first service instruction data forwards the first service instruction data to a train tail machine, and synchronizes the first service instruction data to adjacent relay devices based on the ethernet; step S302, the adjacent relay equipment of the relay equipment cooperatively forwards the first service instruction data to the tail-row host;

Step S303, if any one of the plurality of relay devices monitors the second service instruction data of the tail-row host, the relay device that monitors the second service instruction data forwards the second service instruction data to the tail-row host, and synchronizes the second service instruction data to its adjacent relay device based on the ethernet; and step S304, the adjacent relay equipment of the relay equipment cooperatively forwards the second service instruction data to the train tail machine platform.

In this embodiment, the relay device adopts a 400MHz ground relay station, when the relay station monitors the corresponding service instruction data, the relay station not only forwards the corresponding service instruction data to the corresponding train tail device, but also synchronizes the service instruction data to the adjacent relay station, and the adjacent relay station can perform cooperative forwarding of data according to the service instruction data transmitted by the relay station, where the adjacent relay station receives the service instruction data synchronized by the relay station and forwards the service instruction data, and a certain time delay exists in the forwarding process of the service instruction data, so that signal interference between the relay stations is not caused. In addition, the adjacent relay station can also adopt a mode of forwarding different time sequences from the relay station in the cooperative forwarding process based on the received service instruction data of the relay station so as to further reduce the problems of co-channel interference and the like of signals.

In the process, the relay stations in the relay system are networked through the Ethernet, and communication and collaborative sensing can be carried out between the adjacent relay stations through the Ethernet. When the relay station monitors the train tail information, the relay station can synchronize with the adjacent relay station to perform cooperative relay forwarding, so that the coverage range of relay data transmission is effectively enlarged, the communication distance between the head equipment and the tail equipment of the train is greatly prolonged, and the communication success rate is effectively improved; in addition, the relay stations of the embodiment can jointly judge the forwarding logic according to the data synchronization message, so that the wireless relay of the tail service data is cooperatively forwarded by a plurality of adjacent relay stations through different time sequences, the guarantee is provided for the communication between the head and the tail of the tail device, and the same-frequency signal interference in the wireless communication is effectively avoided.

In one implementation, all the relay stations in the relay system can be classified into an "odd relay station" and an "even relay station" according to the difference of the data processing time sequences. And each relay station has a logical sequence number, and the relay station equipment can determine the equipment information of the front sequence and the rear sequence of the relay station equipment through the sequence relation of the sequence number, so that when the data are synchronized, the synchronous data can be accurately sent to the front and rear equipment in the network. The front/back order device information of the device can be configured locally, and the sequence number order can be adjusted through the network management center, so that the field engineering application is satisfied.

Referring to fig. 4, when only some odd number of relay stations in the system receive the train tail wireless instruction data, and after receiving no corresponding train tail device response instruction message within the waiting time delay t1, the system will send a train tail device response instruction message to the system: (1) The first instruction message at the tail of the column, namely the first business instruction data, is relayed and forwarded in a wireless mode; (2) Synchronizing the first instruction message to two adjacent even relay stations through a wired network; (3) the even relay stations perform wireless relay forwarding; after receiving the response instruction message (carrying the second service instruction data of the train tail host, namely the second instruction message) of the train tail device, the relay station respectively waits according to the waiting time delay t3 and the waiting time delay t4, relays and forwards the train tail instruction message in a wireless mode, synchronizes the train tail instruction message through a wired network and receives the synchronous equipment for wireless forwarding.

Similarly, when only even relays receive the train tail wireless instruction in the system, the relay forwarding instruction is waited for after the delay t2, and the network is synchronized to odd relays.

In a preferred embodiment, the present embodiment considers that after forwarding the service instruction data, the relay device receives the response message corresponding to the service instruction data within a specified time, so as to avoid repeated sending of the data and successful sending of the response message. In this embodiment, after any relay device monitors the first service instruction data of the train tail locomotive, and before the relay device synchronizes the first service instruction data to its adjacent relay device based on the ethernet, the method may further include the following steps:

The relay equipment judges whether a response message corresponding to the first service instruction data is received in a first preset time period, wherein the response message carries third service instruction data sent by the train tail host;

if the response message is not monitored within a first preset time period, executing the steps that the relay equipment forwards the first service instruction data to a train tail machine, and synchronizing the first service instruction data to adjacent relay equipment based on the Ethernet;

or if the response message is monitored within the first preset time period, forwarding the third service instruction data to the train tail locomotive platform within the second preset time period, synchronizing the third service instruction data to adjacent relay equipment based on the Ethernet, and cooperatively forwarding the third service instruction data to the train tail locomotive platform by the adjacent relay equipment.

In one implementation, as shown in fig. 5, when a certain relay station in the relay system receives the train tail wireless instruction data, and after a waiting delay t1, a wireless response instruction message (carrying third service instruction data and continuing taking a second instruction message as an example) of the train tail device is received, and then: (1) Stopping t1 delay timing, and repeating the tail-row instruction message in a wireless mode; (2) After waiting for delay t3 or t4, relaying and forwarding the train tail response instruction message (3) in a wireless mode, and synchronizing a second instruction message to an adjacent relay station through a wired network; and (4) the adjacent relay station performs wireless relay forwarding.

In a preferred embodiment, when the adjacent relay device also monitors the corresponding service instruction data, interference between the same-frequency signals is further reduced. The method of the present embodiment may further include the steps of:

if any one of the plurality of relay devices monitors the first service instruction data of the train tail machine, and the adjacent relay devices of the relay devices monitor the first service instruction data at the same time, the relay devices do not monitor the response message corresponding to the first service instruction data within a third preset time period;

the relay equipment forwards the first service instruction data to the tail-row host, and synchronizes the first service instruction data to the adjacent relay equipment based on the Ethernet; and after receiving the data synchronization message of the relay device, the adjacent relay device stops monitoring the response message corresponding to the first service instruction data, and cooperatively forwards the first service instruction data to the train tail host.

In one implementation, as shown in fig. 6, when adjacent odd-numbered relay stations and even-numbered relay stations in the relay system simultaneously receive the train tail wireless instruction data (i.e., the first instruction message), and after the odd-numbered relay stations wait for the delay t1 and do not receive the corresponding train tail device response instruction message: (1) The odd relay stations relay and forward the train tail instruction information in a wireless mode; (2) The odd relay stations synchronize instruction messages (second instruction messages) to two adjacent even relay stations through a wired network; (3) After receiving the network synchronization instruction, the even relay station stops the waiting processing flow of the waiting delay t2 and immediately wirelessly forwards the synchronization message of the odd relay station.

It can be understood that, before each data forwarding, waiting for the delays t1 to t4 can effectively reduce interference of common-frequency signals between relay stations. For the relay station and the adjacent relay station which both receive the first/second instruction message, the train runs to the signal weak field in the time of data transmission due to the running condition of the train, the corresponding relay station may not be necessarily capable of forwarding the instruction message to the train tail device, and at this time, the above problems can be solved and the communication success rate is improved through instruction synchronization between the relay stations.

The embodiment of the application correspondingly provides a train wireless communication system, as shown in fig. 7, which comprises the relay system 100 and a train tail device 200 wirelessly connected with the relay system 100, wherein the train tail device 200 comprises a train tail locomotive platform 210 and a train tail host 220.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media).

Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

In the description of the embodiments of the present application, the term "and/or" merely represents an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the term "at least one" means any combination of any one or at least two of the plurality, e.g., including at least one of A, B, may mean any one or more elements selected from the set consisting of A, B and C communication.

In the description of the embodiments of the present application, the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the term "plurality" means two or more, unless specifically stated otherwise.

In the description of embodiments of the present application, the terms "first," "second," "third," "fourth," and the like (if any) are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The relay system for train communication is characterized by comprising a plurality of relay devices, wherein adjacent relay devices in the plurality of relay devices are networked through an Ethernet;

the relay devices are respectively used for monitoring first service instruction data of the train tail machine platform, forwarding the first service instruction data to the train tail host when any relay device monitors the first service instruction data, synchronizing the first service instruction data to adjacent relay devices of the relay devices based on the Ethernet, and enabling the relay devices and the adjacent relay devices thereof to cooperatively forward the first service instruction data to the train tail host;

and/or the number of the groups of groups,

the relay devices are respectively used for monitoring second service instruction data of the train tail host, forwarding the second service instruction data to the train tail locomotive platform when any relay device monitors the second service instruction data, synchronizing the second service instruction data to adjacent relay devices of the relay devices based on the Ethernet, and enabling the relay devices and the adjacent relay devices thereof to cooperatively forward the second service instruction data to the train tail locomotive platform.

2. The relay system of claim 1, further comprising:

the network management center is electrically connected with the plurality of relay devices through data transmission links and is used for storing the first service instruction data and/or the second service instruction data and the data synchronization messages among the plurality of relay devices;

and/or the network management center is configured to configure the plurality of relay devices into odd relay devices and even relay devices according to different time sequences of the first service instruction data transmission or the second service instruction data reception, and configure identifiers for the odd relay devices and the even relay devices respectively, wherein when the first service instruction data or the second service instruction data is monitored to be the odd relay devices, the identifiers of the adjacent even relay devices are queried according to the identifiers of the odd relay devices, and the first service instruction data is synchronized to the corresponding even relay devices based on the Ethernet and the identifiers, so that the cooperative forwarding of the first service instruction data is realized.

3. The relay system of claim 1, further comprising:

The maintenance equipment is electrically connected with the relay equipment and comprises a transmitting end and/or a receiving end; wherein,

the transmitting end is used for simulating and transmitting first service instruction data of the train tail machine, and judging whether the forwarding function of the relay equipment is normal or not according to consistency between the first service instruction data and the first service instruction data forwarded by the corresponding relay equipment; and/or the receiving end is used for simulating and receiving the second service instruction data of the train tail host, and judging whether the forwarding function of the relay equipment is normal or not according to the consistency between the second service instruction data and the second service instruction data forwarded by the corresponding relay equipment.

4. The relay system according to claim 2, wherein the plurality of relay devices are respectively connected to the data transmission links, so that ethernet networking is realized between adjacent relay devices through the data transmission links.

5. The relay system according to any one of claims 1 to 4, wherein the relay device is a 400MHz ground relay station, the 400MHz ground relay station comprises a main control board, and a power supply unit, a digital channelizer, an ethernet switch, and a radio frequency unit electrically connected to the main control board, respectively, wherein,

The main control board is used for controlling the operation of the power supply unit, the digital channel machine, the Ethernet switch and the radio frequency unit;

the power supply unit is used for supplying power to the 400MHz ground relay station;

the radio frequency unit is used for transmitting and distributing wireless radio frequency signals;

the digital channel machine is used for receiving and extracting digital wireless signals under the coverage of the wireless radio frequency signals, and generating and transmitting the digital wireless signals so as to enable the 400MHz ground relay station to forward the first service instruction data to a train tail host or forward the second service instruction data to a train tail machine;

the Ethernet switch is used for realizing Ethernet communication between the 400MHz ground relay station and other 400MHz ground relay stations.

6. The relay system of claim 5, wherein the 400MHz terrestrial relay station further comprises: a combiner electrically connected with the radio frequency unit;

the combiner is respectively and electrically connected with an external leaky cable and the repeater and is used for sharing the leaky cable after being combined with the repeater so as to realize the coverage of the wireless radio frequency signals.

7. A communication method, applied to a relay system, the relay system including a plurality of relay devices, adjacent relay devices among the plurality of relay devices being networked via an ethernet network, the method comprising:

If any one of the plurality of relay devices monitors first service instruction data of a train tail machine, the relay device monitoring the first service instruction data forwards the first service instruction data to a train tail machine, and the first service instruction data is synchronized to adjacent relay devices based on the Ethernet;

the adjacent relay equipment of the relay equipment cooperatively forwards the first service instruction data to the tail-row host;

and/or the number of the groups of groups,

if any one of the plurality of relay devices monitors second service instruction data of the train tail host, the relay device monitoring the second service instruction data forwards the second service instruction data to a train tail host, and the second service instruction data is synchronized to adjacent relay devices based on the Ethernet;

and the adjacent relay equipment of the relay equipment cooperatively forwards the second service instruction data to the train tail machine platform.

8. The method of claim 7, wherein after any one of the relay devices listens for the first traffic instruction data of the train tail station and before the relay device synchronizes the first traffic instruction data into its neighboring relay device based on the ethernet, further comprising:

The relay equipment judges whether a response message corresponding to the first service instruction data is received in a first preset time period, wherein the response message carries third service instruction data sent by the train tail host;

if the response message is not monitored within a first preset time period, executing the steps that the relay equipment forwards the first service instruction data to a train tail machine, and synchronizing the first service instruction data to adjacent relay equipment based on the Ethernet;

or if the response message is monitored within the first preset time period, forwarding the third service instruction data to the train tail locomotive platform within the second preset time period, synchronizing the third service instruction data to adjacent relay equipment based on the Ethernet, and cooperatively forwarding the third service instruction data to the train tail locomotive platform by the adjacent relay equipment.

9. The method as recited in claim 7, further comprising:

if any one of the plurality of relay devices monitors the first service instruction data of the train tail machine, and the adjacent relay devices of the relay devices monitor the first service instruction data at the same time, the relay devices do not monitor the response message corresponding to the first service instruction data within a third preset time period;

The relay equipment forwards the first service instruction data to the tail-row host, and synchronizes the first service instruction data to the adjacent relay equipment based on the Ethernet; and after receiving the data synchronization message of the relay device, the adjacent relay device stops monitoring the response message corresponding to the first service instruction data, and cooperatively forwards the first service instruction data to the train tail host.

10. A train radio communication system comprising a relay system according to any one of claims 1-6, and a train tail device in radio connection with the relay system, the train tail device comprising a train tail machine platform and a train tail host.