CN102006104A - Subway train-ground wireless transmission system - Google Patents
Subway train-ground wireless transmission system Download PDFInfo
- Publication number
- CN102006104A CN102006104A CN2010105447352A CN201010544735A CN102006104A CN 102006104 A CN102006104 A CN 102006104A CN 2010105447352 A CN2010105447352 A CN 2010105447352A CN 201010544735 A CN201010544735 A CN 201010544735A CN 102006104 A CN102006104 A CN 102006104A
- Authority
- CN
- China
- Prior art keywords
- receiving device
- wireless transmitting
- train
- base station
- antenna
- 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
Links
Images
Abstract
The invention provides a subway train-ground wireless transmission system which comprises a control center, a first wireless transreceiver and a second wireless transreceiver, wherein the first wireless transreceiver is arranged in a station and based on a coding orthogonal frequency-division multiplexing transmission technique; the second wireless transreceiver is arranged in a train and based on the coding orthogonal frequency-division multiplexing transmission technique; the first wireless transreceiver comprises a first base station receiver and a base station transmitter, the first base station receiver is used for receiving signals at a first frequency, and the base station transmitter is used for transmitting the signals at a second frequency; the second wireless transreceiver comprises a first train transmitter and a train receiver, the first train transmitter is used for transmitting the signals at the first frequency, and the train receiver is used for receiving the signals at the second frequency; and the first wireless transreceiver is connected with the control center through a local area network, and communicates with the second wireless transreceiver. Without the arrangement of a plurality of wireless routers, the manufacturing cost is lowered.
Description
Technical field
The present invention relates to radio transmission technical field, relate in particular to a kind of subway car-ground wireless transmitting system.
Background technology
At present, take subway and be in people's daily life trip mode very easily, subway is arranged on underground usually, therefore can effectively avoid the phenomenon that occurs blocking up.The wireless transmitting system that is used for subway train and station communications in the subway tunnel of prior art adopts the WLAN (wireless local area network) based on the IEEE802.11 standard to realize that wireless transmitting system specifically comprises as lower device: control centre, a plurality of wireless router and wireless transmitting and receiving device usually.In subway tunnel, be provided with wireless router every 200 meters-300 meters, and all wireless routers are connected with control centre by local area network (LAN); And be furnished with a wireless transmitting and receiving device on each train, thus realize carrying out information exchange by wireless router by wireless transmitting and receiving device with control centre, thus the ruuning situation of train in the tunnel just can accurately be learnt by control centre.
As from the foregoing, wireless transmitting system need just be provided with wireless router every 200 meters-300 meters at subway tunnel in the prior art, a large amount of wireless routers need be set, thereby cause wireless transmitting system manufacturing cost height in the prior art.
Summary of the invention
The invention provides a kind of subway car-ground wireless transmitting system, in order to solve subway car-ground wireless transmitting system manufacturing cost height in the prior art, the defective that reliability is low, the manufacturing cost of realization reduction subway car-ground wireless transmitting system.
The invention provides a kind of subway car-ground wireless transmitting system, comprise control centre, also comprise: be used for being arranged on the station and based on first wireless transmitting and receiving device of Coded Orthogonal Frequency Division Multiplexing (COFDM) transmission technology be used for being arranged on train and based on second wireless transmitting and receiving device of Coded Orthogonal Frequency Division Multiplexing (COFDM) transmission technology; Described first wireless transmitting and receiving device comprises the base station device that is used for first base station receiving device of first frequency received signal and is used for transmitting with second frequency, and described second wireless transmitting and receiving device comprises and is used for the first train emitter that transmits with first frequency and is used for train receiving system with the second frequency received signal; Described first wireless transmitting and receiving device is connected with described control centre by local area network (LAN), and communicates to connect with described second wireless transmitting and receiving device.
Subway car provided by the invention-ground wireless transmitting system, by first wireless transmitting and receiving device based on the Coded Orthogonal Frequency Division Multiplexing (COFDM) transmission technology is set in AT STATION, and second wireless transmitting and receiving device based on the Coded Orthogonal Frequency Division Multiplexing (COFDM) transmission technology is set ON TRAINS, because first wireless transmitting and receiving device and second wireless transmitting and receiving device all carry out wireless signal transmission based on the Coded Orthogonal Frequency Division Multiplexing (COFDM) transmission technology, the larger distance of can being separated by between first wireless transmitting and receiving device and second wireless transmitting and receiving device, thereby first wireless transmitting and receiving device can only be set in each station, can realize that train and control centre carry out handshaking, and need not in subway tunnel, to be provided with a plurality of wireless routers, thereby reduced the manufacturing cost of subway car-ground wireless transmitting system.
Aforesaid subway car-ground wireless transmitting system, in order, to avoid the signal phase mutual interference that two trains send occurring during in carriage return at train, described first wireless transmitting and receiving device also comprises second base station receiving device that is used for the 3rd frequency received signal; Described second wireless transmitting and receiving device also comprises the second train emitter that is used for the 3rd frequency emissioning signal.
Aforesaid subway car-ground wireless transmitting system, avoid occurring the signal phase mutual interference that two trains send for more effective, described first base station receiving device comprises first directional receiving antenna, and described second base station receiving device comprises second directional receiving antenna; The described first train emitter comprises first directional transmitting antenna, and the described second train emitter comprises second directional transmitting antenna; Described base station device comprises omnidirectional transmitter antenna, and described train receiving system comprises isotropic receiving antenna.
Aforesaid subway car-ground wireless transmitting system, in order to make second wireless transmitting and receiving device can reliable and effectively transmit and receive signal, described first directional transmitting antenna, described second directional transmitting antenna and described isotropic receiving antenna are the fin class structure.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of subway car of the present invention-ground wireless transmitting system embodiment;
Fig. 2 is the structural representation of first wireless transmitting and receiving device among subway car of the present invention-ground wireless transmitting system embodiment;
Fig. 3 is the structural representation of second wireless transmitting and receiving device among subway car of the present invention-ground wireless transmitting system embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Fig. 1 is the structural representation of subway car of the present invention-ground wireless transmitting system embodiment, Fig. 2 is the structural representation of first wireless transmitting and receiving device among subway car of the present invention-ground wireless transmitting system embodiment, and Fig. 3 is the structural representation of second wireless transmitting and receiving device among subway car of the present invention-ground wireless transmitting system embodiment.As shown in Figure 1-Figure 3, present embodiment subway car-ground wireless transmitting system, comprise control centre 1, also comprise: be used for being arranged on the station and based on COFDM (coded orthogonal frequency division multiplexing, hereinafter to be referred as: COFDM) first wireless transmitting and receiving device 2 of transmission technology and being used for is arranged on train and based on second wireless transmitting and receiving device 3 of COFDM transmission technology; First wireless transmitting and receiving device 2 comprises and is used for comprising with first base station receiving device 21 of first frequency received signal and base station device 22, the second wireless transmitting and receiving devices 3 that are used for transmitting with second frequency and is used for the first train emitter 31 that transmits with first frequency and is used for train receiving system 32 with the second frequency received signal; First wireless transmitting and receiving device 2 is connected with control centre 1 by local area network (LAN), and communicates to connect with second wireless transmitting and receiving device 2.
Particularly, first wireless transmitting and receiving device 2 in present embodiment subway car-ground wireless transmitting system and second wireless transmitting and receiving device 3 all transmit and receive signal based on the COFDM transmission technology.Because COFDM transmission technology maximum rate in the 8MHz channel can reach 27Mbps, higher modulation system and flexibly error correcting system make first wireless transmitting and receiving device 2 and second wireless transmitting and receiving device 3 have the high availability of frequency spectrum; The COFDM transmission technology can provide 50 kilometers link farthest, make first wireless transmitting and receiving device 2 and second wireless transmitting and receiving device 3 can cover scope effectively reliably in 6 kilometers-10 kilometers zone, thereby significantly reduce the quantity of first wireless transmitting and receiving device 2 in subway tunnel, also reduced fault point, switching frequency and maintenance workload simultaneously; First wireless transmitting and receiving device 2 and second wireless transmitting and receiving device 3 have adopted the COFDM transmission technology, make between first wireless transmitting and receiving device 2 and second wireless transmitting and receiving device 3 data signals transmitted highly stable reliable, can transmit data and picture signal simultaneously, and transmission channel adopts transparent transmission, can not cause the data of transmitting between train and the control centre to dock unmatched problem; In addition, data signals transmitted adopts Data Encryption Standard (Data Encryption Standard) between first wireless transmitting and receiving device 2 and second wireless transmitting and receiving device 3, hereinafter to be referred as: DES) or adopt Advanced Encryption Standard (Advanced Encryption Standard, hereinafter to be referred as AES) encryption mechanism, thereby guaranteed the safety of airlink.Present embodiment subway car-the ground wireless transmitting system in use, can in each station, be equipped with a cover first wireless transmitting and receiving device 2, overlap second wireless transmitting and receiving device 3 and on each train, be equipped with one, thereby can need not in subway tunnel a wireless router to be set, greatly reduce the manufacturing cost of present embodiment subway car-ground wireless transmitting system every 200 meters-300 meters.
Present embodiment subway car-ground wireless transmitting system, by first wireless transmitting and receiving device based on the COFDM transmission technology is set in AT STATION, and second wireless transmitting and receiving device based on the COFDM transmission technology is set ON TRAINS, because first wireless transmitting and receiving device and second wireless transmitting and receiving device all carry out wireless signal transmission based on the COFDM transmission technology, the larger distance of can being separated by between first wireless transmitting and receiving device and second wireless transmitting and receiving device, thereby first wireless transmitting and receiving device can only be set in each station, can realize that train and control centre carry out handshaking, and need not in subway tunnel, to be provided with a plurality of wireless routers, thereby reduced the manufacturing cost of subway car-ground wireless transmitting system.
Based on technique scheme, optionally, in order during in carriage return, to avoid occurring the signal phase mutual interference that two trains send at train, first wireless transmitting and receiving device 2 also comprises second base station receiving device 23 that is used for the 3rd frequency received signal; Second wireless transmitting and receiving device 3 also comprises the second train emitter 33 that is used for the 3rd frequency emissioning signal.
Particularly, first wireless transmitting and receiving device 2 in the present embodiment comprises second base station receiving device 23, second wireless transmitting and receiving device 3 comprises the second train emitter 33, and second base station receiving device 23 and the second train emitter 33 all carry out the transmission of signal with the 3rd frequency.In present embodiment subway car-ground wireless transmitting system actual application, can be AT STATION in a side of the track laid of forward be provided with first base station receiving device 21, and in the train of forward travel, open the first train emitter 31; Simultaneously, a side of the track of oppositely laying in AT STATION is provided with second base station receiving device 23, and opens the second train emitter 33 in the train of backward going.Thereby, the train of forward travel outwards transmits with first frequency by the first train emitter 31, and first base station receiving device 21 that is positioned at track one side that forward lays will receive the first train emitter 31 accurately with the outside signal of emission of first frequency; Same, the train of backward going outwards transmits with the 3rd frequency by the second train emitter 33, and second base station receiving device 23 that is positioned at track one side of reverse laying will receive the signal that the second train emitter 33 is outwards launched with the 3rd frequency accurately, mutual problem of co-channel interference can not appear, thereby effectively avoid the signal phase mutual interference that two trains send occurring, improved the accuracy of 1 picked up signal of control centre.
Further, avoid occurring the signal phase mutual interference that two trains send for more effective, first base station receiving device 21 in the present embodiment comprises first directional receiving antenna (not shown), and second base station receiving device 23 comprises second directional receiving antenna (not shown); The first train emitter 31 comprises first directional transmitting antenna (not shown), and the second train emitter 33 comprises second directional transmitting antenna (not shown); Base station device 22 comprises omnidirectional transmitter antenna (not shown), and train receiving system 32 comprises isotropic receiving antenna (not shown).Concrete, first base station receiving device 21 can only receive the signal of launching on the prescribed direction by first directional receiving antenna, same, the first train emitter 31 can only be with the signal of the outside emission of prescribed direction by first directional transmitting antenna, thereby the train that can guarantee forward travel can only transmit by first base station receiving device 21 in the station of arranging along the track forward by the first train emitter 31, thereby more effectively avoids occurring the signal phase mutual interference that two trains send.Present embodiment subway car-ground wireless transmitting system is that example describes with the train of forward travel, the train of forward travel adopts the mode of directional transmissions by the signal of the first train emitter, 31 emissions, when train when last station is left, last station just can not receive the signal of train emission, calculate the signal of this moment according to the transmission range of emission and should arrive next station, also might be farther, but first base station receiving device 21 at next station receives the vehicle emission peak signal that identification is automatically rolled away from from last station, thereby not can with other website signal conflicts, the train of front and back is successively according to this method design and operation.Because subway train has internal network, so the signal that is input to first wireless transmitting and receiving device 2 the station from the train front end is the fixing data-signal of IP of ether guipure, the data-signal that first wireless transmitting and receiving device 2 at station is received also is identical with the IP address that emits, and so just can be easy to distinguish specifically is the signal which train sends.In addition, base station device 22 in the present embodiment comprises omnidirectional transmitter antenna, and train receiving system 32 also comprises isotropic receiving antenna, thereby control command or information that control centre 1 is sent, can transmit by each train in subway tunnel of the omnidirectional transmitter antenna in the base station device 22 in the station, the train receiving system 32 on the train can reliably receive the relevant information that control centre 1 sends accurately by isotropic receiving antenna.
Further, can reliable and effectively transmit and receive signal in order to make second wireless transmitting and receiving device 3, first directional transmitting antenna, second directional transmitting antenna and isotropic receiving antenna are the fin class structure.Concrete, first directional transmitting antenna, second directional transmitting antenna and the isotropic receiving antenna that are provided with in second wireless transmitting and receiving device 3 ON TRAINS all adopt the fin class structure, the antenna of fin class structure have reliable in structure, water resistance good, have high-gain, the standing wave performance is excellent and convenient advantage of installing, thereby make train can reliable and effectively transmit and receive signal by second wireless transmitting and receiving device 3.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. subway car-ground wireless transmitting system, comprise control centre, it is characterized in that, also comprise: be used for being arranged on the station and based on first wireless transmitting and receiving device of Coded Orthogonal Frequency Division Multiplexing (COFDM) transmission technology be used for being arranged on train and based on second wireless transmitting and receiving device of Coded Orthogonal Frequency Division Multiplexing (COFDM) transmission technology; Described first wireless transmitting and receiving device comprises the base station device that is used for first base station receiving device of first frequency received signal and is used for transmitting with second frequency, and described second wireless transmitting and receiving device comprises and is used for the first train emitter that transmits with first frequency and is used for train receiving system with the second frequency received signal; Described first wireless transmitting and receiving device is connected with described control centre by local area network (LAN), and communicates to connect with described second wireless transmitting and receiving device.
2. subway car according to claim 1-ground wireless transmitting system is characterized in that described first wireless transmitting and receiving device also comprises second base station receiving device that is used for the 3rd frequency received signal; Described second wireless transmitting and receiving device also comprises the second train emitter that is used for the 3rd frequency emissioning signal.
3. subway car according to claim 2-ground wireless transmitting system is characterized in that described first base station receiving device comprises first directional receiving antenna, and described second base station receiving device comprises second directional receiving antenna; The described first train emitter comprises first directional transmitting antenna, and the described second train emitter comprises second directional transmitting antenna; Described base station device comprises omnidirectional transmitter antenna, and described train receiving system comprises isotropic receiving antenna.
4. subway car according to claim 3-ground wireless transmitting system is characterized in that, described first directional transmitting antenna, described second directional transmitting antenna and described isotropic receiving antenna are the fin class structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105447352A CN102006104A (en) | 2010-11-05 | 2010-11-05 | Subway train-ground wireless transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105447352A CN102006104A (en) | 2010-11-05 | 2010-11-05 | Subway train-ground wireless transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102006104A true CN102006104A (en) | 2011-04-06 |
Family
ID=43813213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105447352A Pending CN102006104A (en) | 2010-11-05 | 2010-11-05 | Subway train-ground wireless transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102006104A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113452389A (en) * | 2021-08-13 | 2021-09-28 | 南京康尼机电股份有限公司 | Station door double-wireless redundant signal transmission system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502502A (en) * | 2002-11-19 | 2004-06-09 | 杨尔坚 | Prealarm method for preventing car overtaking collision and signal system thereof |
| CN1622140A (en) * | 2003-11-26 | 2005-06-01 | 杨尔坚 | Early warning method and signal system thereof for preventing automobile tailgating |
| CN101030792A (en) * | 2006-11-14 | 2007-09-05 | 夏陵东 | Audio-visual system by railway or subway coach broadcasting or power-supply circuit transmission |
-
2010
- 2010-11-05 CN CN2010105447352A patent/CN102006104A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502502A (en) * | 2002-11-19 | 2004-06-09 | 杨尔坚 | Prealarm method for preventing car overtaking collision and signal system thereof |
| CN1622140A (en) * | 2003-11-26 | 2005-06-01 | 杨尔坚 | Early warning method and signal system thereof for preventing automobile tailgating |
| CN101030792A (en) * | 2006-11-14 | 2007-09-05 | 夏陵东 | Audio-visual system by railway or subway coach broadcasting or power-supply circuit transmission |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113452389A (en) * | 2021-08-13 | 2021-09-28 | 南京康尼机电股份有限公司 | Station door double-wireless redundant signal transmission system and method |
| CN113452389B (en) * | 2021-08-13 | 2022-07-01 | 南京康尼机电股份有限公司 | Station door double-wireless redundant signal transmission system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101355477B (en) | Wireless access system and transmission method | |
| CN102082713B (en) | High-speed rail mobile communication system and working method thereof | |
| US9401736B2 (en) | Radio communication apparatus, radio communication system, and radio communication method | |
| JPWO2005081558A1 (en) | Mobile device and method of arranging wireless interface | |
| WO2016119873A1 (en) | Radio cell arrangement in high speed scenario | |
| CN103516637A (en) | Downlink communication method in high speed railway system and device thereof | |
| CN102970067B (en) | A kind of method for realizing continuous print broadband connections | |
| CN106341821B (en) | LTE-based rail transit wireless data interference suppression method and system | |
| Chiao et al. | WiFi multicast streaming using AL-FEC inside the trains of high-speed rails | |
| KR20120071757A (en) | Apparatus and system of providing wireless local area network service for means of transport | |
| CN102811083A (en) | Method for pre-acquiring channel information in high-speed railway environment | |
| CN101521909B (en) | Signaling forwarding method for communication between base stations based on terminal relays | |
| CN102545972A (en) | Short-distance wireless communication device and method | |
| US20190380170A1 (en) | Ad hoc communication network | |
| CN106817705B (en) | Track networking system compatible with WLAN and LTE-M wireless signals | |
| ATE293344T1 (en) | RADIO COMMUNICATION SYSTEM | |
| CN104919722A (en) | Relay system for moving object | |
| CN201860329U (en) | Metro train-ground wireless transmission system | |
| KR20130039156A (en) | Applied alamouti method for enhancing radio communication control system of marin wind power | |
| CN102006104A (en) | Subway train-ground wireless transmission system | |
| US11012484B2 (en) | Audio data communication system | |
| CN102761883B (en) | Multi-hop broadband wireless communication system and wireless node device thereof | |
| CN103220682A (en) | Antenna selection method and device in data transmission process | |
| CN102624431A (en) | Method and system for improving communication capacity of multiple antennae at vehicle-mounted terminal | |
| CN103825637A (en) | Rail communication method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110406 |