CN108401260A - Car-ground radio mobile roaming communication system - Google Patents
Car-ground radio mobile roaming communication system Download PDFInfo
- 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
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- wireless
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- base station
- communication system
- radio mobile
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- 238000004891 communication Methods 0.000 title claims abstract description 27
- 230000006854 communication Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 1
- 239000013307 optical fiber Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0018—Communication with or on the vehicle or train
- B61L15/0027—Radio-based, e.g. using GSM-R
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols 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
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.
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)
| Publication Number | Publication Date |
|---|---|
| CN108401260A true CN108401260A (en) | 2018-08-14 |
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ID=63094079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710069571.4A Pending CN108401260A (en) | 2017-02-08 | 2017-02-08 | Car-ground radio mobile roaming communication system |
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| Country | Link |
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| CN (1) | CN108401260A (en) |
Cited By (3)
| 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)
| 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 |
-
2017
- 2017-02-08 CN CN201710069571.4A patent/CN108401260A/en active Pending
Patent Citations (4)
| 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)
| 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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