CN108401260A - Car-ground radio mobile roaming communication system - Google Patents

Car-ground radio mobile roaming communication system Download PDF

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Publication number
CN108401260A
CN108401260A CN201710069571.4A CN201710069571A CN108401260A CN 108401260 A CN108401260 A CN 108401260A CN 201710069571 A CN201710069571 A CN 201710069571A CN 108401260 A CN108401260 A CN 108401260A
Authority
CN
China
Prior art keywords
wireless
car
base station
communication system
radio mobile
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710069571.4A
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Chinese (zh)
Inventor
彭波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianshi Tong Lian (beijing) Technology Co Ltd
Original Assignee
Tianshi Tong Lian (beijing) Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianshi Tong Lian (beijing) Technology Co Ltd filed Critical Tianshi Tong Lian (beijing) Technology Co Ltd
Priority to CN201710069571.4A priority Critical patent/CN108401260A/en
Publication of CN108401260A publication Critical patent/CN108401260A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00Indicators provided on the vehicle or train for signalling purposes
    • B61L15/0018Communication with or on the vehicle or train
    • B61L15/0027Radio-based, e.g. using GSM-R
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/22Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/12Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to a kind of car-ground radio mobile roaming communication systems, including control centre, trackside access net, vehicle-carrying communication unit.Control centre controls the process of whole system;Vehicle-carrying communication unit (mark 1), vehicle-carrying communication unit and trackside base station AP are installed on train(Mark 2)It is connected, control centre(Mark 3)It is connected to trackside base station AP by optical fiber, trackside base station AP is communicated with onboard wireless AP, and the image and data that are collected on vehicle are passed back control centre by onboard wireless AP.The present invention takes two antennas to be communicated with the trackside base station ends AP and identifies front and back base station, and carries out net switching, realizes data facile transport.

Description

Car-ground radio mobile roaming communication system
Technical field
The invention belongs to car-ground radio mobile roaming communication system applications V-neck V domains.
Background technology
Urban track traffic PIS systems mainly use the wireless local area network technology based on WLAN, the 4G skills based on LTE at present Art and mobile TV technology come carrying vehicle communication service based on DVB-T.
WLAN technologies mainly use IEEE802.11g/n/ac standards, using the two ISM bands of 2.4GHz and 5GHz. WLAN technologies have many advantages, such as that free removable access, frequency, technology maturation, equipment is cheap and is easy to deployment;As WLAN is new The release of technology, new standard, WLAN are greatly improved in transmission bandwidth, coverage distance, switching time etc., full It has not been problem in terms of sufficient urban track traffic PIS system car-ground radio datas transmitted in both directions.But WLAN does not account for high speed The needs of mobile environment, when train speed is more than 160km/h, mobility is then apparent insufficient.
LTE technologies, are broadly divided into frequency division duplex(Frequency Division Duplexing, FDD)And time division duplex (Time Division Duplexing, TDD)Two ways.Wherein TD-LET is the LTE standards of China's independent intellectual property right. LTE technologies have mobility strong(Rate travel is supported to be up to 400km/h), strong antijamming capability(Special frequency range 1785- 1805MHz), terminal disconnection rate it is low(Single MPS process distance reaches 1.2km or more, reduces switching times), safeguard it is simple(Section has Source device is few)The advantages that.But LTE has limitation in limited frequency resource in terms of transmission bandwidth;Its system wireless frequency Section needs special application;Equipment cost is relatively expensive.
DVB-T mobile TV technologies, are called and do ground digital television broadcast(DVB-T, Digital Video Broadcasting - Terrestrial), it is the general terrestrial digital TV standard in Europe.Mobile TV based on DVB-T System only realizes control centre to the one-way data transfer of train, can only realize the biography down of PIS system information programs, and nothing Method realizes that Vehicular video uploads the Network Management Function of the function and in-vehicle wireless device of control centre, cannot be satisfied rail traffic Operation management requirement, therefore do not analysed in depth in this project.
Invention content
The present invention uses WLAN technologies, provides a kind of car-ground radio mobile roaming communication system of practicability, realizes traveling In train and ground control centre wireless broadband communication so that some functions of comprehensive monitoring system are able to reality between vehicle ground It is existing, for example, in compartment video monitoring, image real-time upload(Belong to CCTV systems,)Multimedia PIS on-vehicle informations pass down in real time, Vehicle, the transmission of passenger's status information in traveling.
The present invention adopts the following technical scheme that:Provide the entitled car-ground radio movement based on IEEE802.11n standards Roaming communication system, the system have carried out special optimization for rail traffic running environment, can reach stable 100Mbps or more Vehicle-ground wireless communication, and there is loop to avoid, " 0 " packet drop mechanism, ensure streaming media service transmission.
System structure:Car-ground radio mobile roaming communication system is connect by control centre's (mark 3 in attached drawing Fig. 3), trackside It networks(Mark 2 in trackside fixed equipment attached drawing Fig. 3), onboard system(Mark 1 in train LAN attached drawing Fig. 3)Three parts Composition.
Control centre:Simulation control center is located in PIS communications equipment rooms, it is by Network Management System, wireless controller (AC), emulating server, the compositions such as center switch, complete to the real time monitoring of trackside AP working conditions along the line, parameter setting, Mobile handoff, fault alarm, fault message record, fault message inquiry.
Trackside accesses net:Trackside, which accesses host, to hand over transceiver module etc. by trackside optical fiber, trackside AP casees, directional aerial, light Equipment forms, and optical fiber is crossed by trackside access Netcom and center switch is connected to control centre, for all tracksides, control centre's terminal Equipment and along the line AP provide access service.All trackside AP are linked into control centre's interchanger by optical fiber cascade.
Vehicle-carrying communication unit:Mainly by onboard wireless AP, car antenna and radio frequency feed line and vehicle-mounted group of switches at realization Train and trackside data access net two-way wireless communication.
The positive effect of the present invention is that:Before the present invention takes two antennas to communicate and identify with base station end Base station afterwards, and net switching was carried out, it realizes that data are smooth, is to provide real time data judgement in train travelling process.
Description of the drawings
Fig. 1 is structural schematic diagram vehicle-mounted in the present invention.
Fig. 2 is the structural schematic diagram of trackside base station in the present invention.
Fig. 3 is one of signal transmission figure in train traveling process in the present invention.
Fig. 4 is two of signal transmission figure in train traveling process in the present invention.
Specific implementation mode
Control centre:Computer room control centre is made of a controller, interchanger, NM server, PIS servers, leads to Optical fiber is crossed with trackside terrestrial wireless AP to be connected.Computer room installs a computer, and NM server is equipped with system network management software, is used for Manage system equipment.The PIS information on ground can connect wireless system by center switch, and be arrived by landline transmission of network Trackside wireless aps, the PIS signals received are converted into wireless signal by trackside wireless aps, and are sent to track section.Vehicle-mounted nothing Line unit receives the wireless signal of track section, and sends vehicle-mounted PIS systems to by On-board LAN and handle.
Collected video image is transmitted to vehicular mounted radio units, vehicle-mounted nothing by vehicle-mounted CCTV systems by On-board LAN Line unit is sent to track section after trackside wireless aps receive the signal by wireless signal by car antenna and passes through ground Face cable network passes to control centre.
Trackside accesses net:The wireless aps deployment of wireless system in orbit, provides the train moved on track continuous Signal access point, single trackside AP that covers is by 1 wireless aps, 1 AC POE module(220VAC powers), 1 interchanger, optical fiber transceiving Device.Trackside wireless aps use radio frequency units and antenna separation design, receive the two-way covering of transmission antenna.
Vehicle-carrying communication unit:Vehicle-carrying communication unit contains 1 set of vehicle-mounted wireless aps, and it includes 1 trolley often to cover vehicle-mounted wireless aps respectively Carry radio-cell, 1 POE equipment, two antenna elements.Onboard wireless AP antennas are separately mounted to the driver of the tailstock and headstock Room.
Switching principle:Wireless vehicle mounted switching uses alien frequencies switching mode, the channel that all AP are used all to be staggered, avoid producing Raw interference, antenna use directional aerial;Two antennas of car-mounted terminal, which are located at, is located at headstock and the tailstock, the day of the headstock tailstock Line can all be linked in sequence the base station of trackside according to signal strength and trackside base station, wherein a link is primary link, a link For backup link;At this point, original primary link can become backup link, backup link originally becomes primary link;Continue in this way Go down, entire train whole process is all that a master one is standby, will not packet loss.

Claims (7)

1. a kind of car-ground radio mobile roaming communication system, it is characterised in that:Including following main contents;
Onboard wireless AP (attached drawing 1):Two-way integrated wireless car-mounted terminal, fan antenna design, while linking two wireless bases It stands, automatic search link optimum signal base station, intelligent selection is transmitted adjacent to best link, keeps backup link link;
Trackside wireless aps (attached drawing 2):Outside telecommunication grade wireless base station, special TDMA point to multipoint communi cation protocol, intelligent roaming switching are fixed Adopted high priority data transmission, supports a wide range of covering;
Wireless controller (mark 3):Intelligence control system is managed collectively wireless base station and car-mounted terminal, the best chain of smart allocation Road is truly realized seamless roam, and packet loss, data upload are not lost substantially for switching, and video is smooth.
2. car-ground radio mobile roaming communication system according to claim 1, it is characterised in that:It is scanned in onboard wireless AP The setting channel that only scanning trackside wireless aps are arranged, improves communication performance in list of frequency.
3. car-ground radio mobile roaming communication system according to claim 1, it is characterised in that:Onboard wireless AP is according to letter Number intensity and the judgement of CCQ intelligent selections connect or disconnect neighbor base station.
4. car-ground radio mobile roaming communication system according to claim 1, it is characterised in that:Onboard wireless AP switchings are adopted With alternately connection type, it is ensured that link all-the-time stable links, handoff procedure not packet loss.
5. car-ground radio mobile roaming communication system according to claim 1, it is characterised in that:Begin in train travelling process Whole dual link backup link a, it is ensured that link goes wrong, another normal operation.
6. car-ground radio mobile roaming communication system according to claim 1, it is characterised in that:The onboard wireless AP packets Two sets of antenna equipments and the mainboard inside onboard wireless AP machines are included, the network interface of mainboard receives from interior data, leads to It crosses wireless module to distribute signal by antenna, monitoring center is returned in base station by wire transmission again after receiving signal.
7. car-ground radio mobile roaming communication system equipment according to claim 1, it is characterised in that:Described vehicle-mounted two sets Antenna equipment is located at headstock portion and tailstock portion.
CN201710069571.4A 2017-02-08 2017-02-08 Car-ground radio mobile roaming communication system Pending CN108401260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710069571.4A CN108401260A (en) 2017-02-08 2017-02-08 Car-ground radio mobile roaming communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710069571.4A CN108401260A (en) 2017-02-08 2017-02-08 Car-ground radio mobile roaming communication system

Publications (1)

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CN108401260A true CN108401260A (en) 2018-08-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111654837A (en) * 2020-03-12 2020-09-11 成都唐源电气股份有限公司 Vehicle-ground dynamic data transmission method and system based on double logic channels
CN113411823A (en) * 2020-03-17 2021-09-17 青岛海尔工业智能研究院有限公司 Wireless communication system and method
CN114071413A (en) * 2021-10-15 2022-02-18 交控科技股份有限公司 Rail transit wireless communication architecture

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101754292A (en) * 2008-12-09 2010-06-23 上海欣民通信技术有限公司 Seamless roaming method for train-ground communication of rail transportation
CN101917749A (en) * 2010-08-17 2010-12-15 杭州华三通信技术有限公司 Method and device for realizing channel dynamic handoff in train communication system
CN103731890A (en) * 2013-12-11 2014-04-16 福建星网锐捷网络有限公司 Link switching method under high-speed motion state, vehicle-mounted AP and system
CN105704740A (en) * 2015-06-29 2016-06-22 南方银谷科技有限公司 Train vehicle-ground communication network system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101754292A (en) * 2008-12-09 2010-06-23 上海欣民通信技术有限公司 Seamless roaming method for train-ground communication of rail transportation
CN101917749A (en) * 2010-08-17 2010-12-15 杭州华三通信技术有限公司 Method and device for realizing channel dynamic handoff in train communication system
CN103731890A (en) * 2013-12-11 2014-04-16 福建星网锐捷网络有限公司 Link switching method under high-speed motion state, vehicle-mounted AP and system
CN105704740A (en) * 2015-06-29 2016-06-22 南方银谷科技有限公司 Train vehicle-ground communication network system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111654837A (en) * 2020-03-12 2020-09-11 成都唐源电气股份有限公司 Vehicle-ground dynamic data transmission method and system based on double logic channels
CN113411823A (en) * 2020-03-17 2021-09-17 青岛海尔工业智能研究院有限公司 Wireless communication system and method
CN114071413A (en) * 2021-10-15 2022-02-18 交控科技股份有限公司 Rail transit wireless communication architecture
CN114071413B (en) * 2021-10-15 2024-03-15 交控科技股份有限公司 Wireless communication architecture for rail transit

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Application publication date: 20180814

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