CN101145888A - Trustable transmission system and method of car-ground radio data for track traffic - Google Patents
Trustable transmission system and method of car-ground radio data for track traffic Download PDFInfo
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- CN101145888A CN101145888A CNA2007101208172A CN200710120817A CN101145888A CN 101145888 A CN101145888 A CN 101145888A CN A2007101208172 A CNA2007101208172 A CN A2007101208172A CN 200710120817 A CN200710120817 A CN 200710120817A CN 101145888 A CN101145888 A CN 101145888A
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Abstract
The invention discloses a credible vehicle-ground wireless data transmission system and a method facing rail transit, pertaining to the field of wireless data transmission technology. The invention is to improve the credibility of the vehicle-ground wireless data transmission in rail transit, and is divided into a ground part and an on-board/mobile part, and each part comprises a data transmission module and a transmission control module; an independent mobile data transmission module is used, the connection between the transmission equipment and the transmission control module is realized via a standard interface, and the data transmission module is independent from the transmission control module; the on-board and the ground parts are equipped with a data self-detecting module to identify the data to be delivered and ensure the low error delivering rate; by analyzing history data, the signal instructions are classified by using a fuzzy clustering method, and a mapping relationship table between the region-time and the signal instruction is built up according to the instruction set in different regions and different times; an 'additional instruction information' field is added when data are delivered for assisting counterparts to read out the instruction and ensuring the low error read rate of the data transmission.
Description
Technical field
The invention belongs to the wireless data transmission technology field, particularly a kind of credible transmission system and method for the car-ground radio data towards track traffic.
Background technology
Along with the fast development of domestic and international track traffic, radio communication becomes the target and the standard of various countries' train control system development gradually between car ground.European Train Control System (ETCS) is the common specification that a plurality of countries in Europe formulate; ETCS2 is a kind of train control system based on RFDC, comes into operation at present.In December, 2002, in International Union of Railways (UIC) conference that China holds, the Ministry of Railways announces the planning of developing china train operation control system (CTCS); Wherein, CTCS3-4 is based on the train mode of radio communication, has indicated the developing direction of China's train control system.
RFDC in the track traffic provides the basic communication guarantee for Train Control, therefore, and one of emphasis that believable car-ground radio data transmission technology is field of track traffic research.The credibility of track traffic wireless data transmission mainly comprises the content of three aspects: low error rate, low misinformation rate and low read false rate; Wherein low read false rate is the core content of credible transmission.The wireless data transmission research of current various countries mainly concentrates on the low error rate aspect based on the specific wireless data transmission technology, lacks towards the credible transmission technology scheme of car-ground radio data of low misinformation rate and low read false rate.
Summary of the invention
The credible transmission system and the method that the purpose of this invention is to provide a kind of car-ground radio data towards track traffic.Main in order to improve the credibility of rail transit field wireless data transmission, guarantee the secure wireless communication of track traffic, for all kinds of development based on control system in communication of track traffic provide safeguard.
Operation principle of the present invention is: at the requirement of wireless data transmission at credible different aspect, adopt data transmission structure by different level, make transmission control module be independent of concrete physical layer transmission technology.Guaranteeing aspect wireless data transmission credible, adopting to send the data self-detection mechanism and guarantee low misinformation rate; The method that zone-time period and signal instruction mapping relations table are set up in employing guarantees low read false rate.According to the feature difference that track traffic shows in the zones of different different time sections, adopt fuzzy clustering method that data-signal is instructed and classify, and in the transmission data, attach this type of Classification and Identification field of increase, reduce the read false rate of transfer of data.
According to above-mentioned operation principle, the technical solution adopted in the present invention is as follows:
(1) adopts clearly architecture of hierarchical structure, be convenient to module and function and divide; Integral body is divided into above ground portion and vehicle-mounted movable part, and each part comprises data transmission module and transmission control module;
(2) adopt independently mobile data transport module, realize being connected between transmission equipment and the system transmissions control module by standard interface, make data transmission module be independent of transmission control module, promptly in described credible transport module, do not relate to concrete physical layer transmission technology;
(3) guaranteeing that aspect the low misinformation rate, vehicle-mounted and above ground portion has been set up " data selftest module ",, must operate the affirmation of finishing data to be sent through the self check of system, to guarantee the low misinformation rate of transfer of data to any data of sending of being about to;
(4) by analysis to historical data, at track traffic operation characteristic in zones of different and different time sections, increase is to the feature description of car-ground radio data communication, employing is classified to signal instruction based on the method for fuzzy clustering, obtains the instruction set under the zones of different different time sections feature.
Instruction set under the described acquisition zones of different different time sections feature is that the rail transit field wireless data transmission is divided into different subclass by the zone with the time period feature, and set up the mapping relations table of zone-time period and signal instruction in view of the above, make in the zone of particular type with in the time period, complicated higher-dimension wireless data transmission feature is mapped in the simple linear space, RFDC between car ground is limited in the scope of each subclass, improves the credibility of RFDC.
When sending data, increase " extra-instruction information " field, be used for auxiliary the other side's reading command, guarantee the low read false rate of transfer of data.One time period of zone and signal instruction mapping relations table were set up before transfer of data begins, and vehicle-mounted and above ground portion is safeguarded jointly.
Advantage of the present invention is: adopt independently physical layer data transport module, make transmission control module need not to be concerned about concrete physical transmission techniques, be convenient to implement credible wireless data transmission control method; Carry out the self check operation before data send, guarantee the low misinformation rate of transfer of data; Receive after the data according to a regional time period and signal instruction mapping relations table and read wherein added field and instruction, reduce the read false rate of transfer of data.More than the strong assurance in three aspects the credibility of rail transit field wireless data transmission.
Description of drawings
Fig. 1 is the credible transmission primary structure of a car-ground radio data framework.
Fig. 2 sends and the flow chart that receives data
Embodiment
Described among Fig. 1 towards the basic architecture of the credible transmission technology of car-ground radio data of track traffic, adopted independently physical layer data transport module, made described credible transmission method be independent of concrete physical network and have better universality; System is made of vehicle-mounted movable part and above ground portion, and every part all comprises transmission control module and data transmission module separately.
Wherein vehicle-mounted movable part is composed as follows:
Transmission control module comprises: a regional time period and signal instruction mapping relations table 101, and real time data processing module 102, mobile data center 103, data distributing program 104 sends data selftest module 105, data collection service logical one 06;
Data transmission module comprises independent mobile data transmission equipment/program 107;
Above ground portion composed as follows:
Transmission control module comprises: data distributing program 109 sends data selftest module 110, a regional time period and signal instruction mapping relations table 111, intensive data processing module 112, backstage/ground data center 113;
Data transmission module comprises independent ground data transmission set/program 108;
Send part in data, increase " sending the data selftest module ", be used for, guarantee to send the low misinformation rate of data to sent carrying out self check; In Data Receiving and processing section, adopt " zone-time period and signal instruction mapping relations table " that extra information field and signal instruction are carried out verification and guarantee misreading of signal instruction not taken place.
Among Fig. 2 brief description the process of transfer of data, be divided on the whole and send data 201 and receive data 206 two parts.
The transmission data division comprises the steps:
1. generate and send data 202
2. send data self check 203
3. extra information field 204 is added in contrast " mapping relations table "
4. be committed to data transmission module 205
The reception data division comprises the steps:
1. receive data 207 from data transmission module
2. extra information field 208 is read in contrast " mapping relations table "
3. read command adapted thereto field 209
4 mate 210 to both
5. change data processing module 211 over to
Send data division and carry out the self check of data to be sent, and add extra information field according to " mapping relations table "; In Data Receiving and processing section, need read extra information field and signal instruction, and both be carried out checking treatment according to " mapping relations table "; When verification was failed, the data transmission blocks in the meeting calling system sent command request repeating transmission or affirmation.
Claims (5)
1. the credible transmission system towards the car-ground radio data of track traffic is made of vehicle-mounted/movable part and above ground portion, and every part all comprises transmission control module and data transmission module separately, it is characterized in that:
Described vehicle-mounted/movable part composed as follows:
Transmission control module comprises: zone-time period and signal instruction mapping relations table (101), real time data processing module (102), mobile data center (103), data distributing program (104), send data selftest modules (105), data collection service logic (106);
Data transmission module comprises independent mobile data transmission equipment/program (107);
Described above ground portion composed as follows:
Transmission control module comprises: data distributing program (109) sends data selftest modules (110), zone-time period and signal instruction mapping relations table (111), intensive data processing module (112), backstage/ground data center (113);
Data transmission module comprises independent ground data transmission set/program (108);
Verification is carried out to data to be sent in transmission data selftest module (105), (110) that above-mentioned data send part to be increased; Aspect wireless data transmission, adopt independently mobile data transport module, realize being connected between transmission equipment and the system transmissions control module by standard interface, make data transmission module be independent of transmission control module, promptly in described credible transport module, do not relate to concrete physical layer transmission technology.
2. the credible transmission system of a kind of car-ground radio data towards track traffic according to claim 1, it is characterized in that according to the operation characteristic of track traffic in zones of different and different time sections, adopt a kind of method that wireless data transmission instruction between car ground is classified based on fuzzy clustering (FuzzyClustering), promptly increase the feature description that car-ground radio data is communicated by letter at track traffic operation characteristic in zones of different and different time sections, the rail transit field wireless data transmission is divided into different subclass by the zone with the time period feature, sets up described zone-time period and signal instruction mapping relations table (101), (111).
3. a kind of credible transmission system towards wireless data between the car ground of track traffic according to claim 2 is characterized in that, described car-ground radio data transmission is that wireless data transmission is divided into tcp data segment and transmission control section; Tcp data segment mainly is meant the wireless data transmission function of physical layer, and the assurance of low error rate is provided; The transmission control structure comprises at hanging down misinformation rate and low read false rate takes the various measures of layer architecture.
4. credible transmission method towards the car-ground radio data of track traffic is characterized in that: this method is to send data division carries out data to be sent before sending data self check, and adds extra information field according to " mapping relations table "; In Data Receiving and processing section, need read extra information field and signal instruction, and both be carried out checking treatment according to " mapping relations table "; When verification was failed, the data transmission blocks in the meeting calling system sent command request repeating transmission or affirmation; The process of described transfer of data is divided into transmission data (201) and receives data (206) two parts;
Described transmission data division comprises the steps:
1) generate transmission data (step 202),
2) send data self checks (step 203),
3) extra information field (step 204) is added in contrast " mapping relations table ",
4) be committed to data transmission module (step 205);
The reception data division comprises the steps:
1) receive data (step 207) from data transmission module,
2) extra information field (step 208) is read in contrast " mapping relations table ",
3) read command adapted thereto field (step 209),
4) both are mated (step 210),
5) change data processing module (step 211) over to.
5. the credible transmission method of a kind of car-ground radio data towards track traffic according to claim 4, it is characterized in that, described to both mate step 210 be used to control whether carry out next step change data processing module step 211 over to, if the coupling would change data processing module step 211 over to, otherwise the transmission data division in the meeting calling system sends command request repeating transmission or affirmation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101208172A CN101145888B (en) | 2007-08-27 | 2007-08-27 | Trustable transmission method of car-ground radio data for track traffic |
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| CN2007101208172A CN101145888B (en) | 2007-08-27 | 2007-08-27 | Trustable transmission method of car-ground radio data for track traffic |
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| CN101145888A true CN101145888A (en) | 2008-03-19 |
| CN101145888B CN101145888B (en) | 2011-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819416A (en) * | 2010-03-19 | 2010-09-01 | 上海慧桥电气自动化有限公司 | Method for collecting, detecting and monitoring data of high-speed trains |
| CN108170110A (en) * | 2017-12-26 | 2018-06-15 | 中交机电工程局有限公司 | Urban track traffic electronic ＆ mechanic machine control system |
| CN115314554A (en) * | 2022-09-26 | 2022-11-08 | 北京城建设计发展集团股份有限公司 | Data access method, device and system of rail transit heterogeneous system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1154299C (en) * | 1997-03-19 | 2004-06-16 | 株式会社日立制作所 | Method and system for controlling train by radio |
| US6854691B2 (en) * | 2002-02-11 | 2005-02-15 | General Electric Company | Railroad communication system |
| CN100358263C (en) * | 2005-06-10 | 2007-12-26 | 上海新干通通信设备有限公司 | Locomotive wireless communication system |
| CN1817709A (en) * | 2006-03-15 | 2006-08-16 | 北京交通大学 | CTCS2-grade train controlling system based on wireless locomotive signal |
-
2007
- 2007-08-27 CN CN2007101208172A patent/CN101145888B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819416A (en) * | 2010-03-19 | 2010-09-01 | 上海慧桥电气自动化有限公司 | Method for collecting, detecting and monitoring data of high-speed trains |
| CN108170110A (en) * | 2017-12-26 | 2018-06-15 | 中交机电工程局有限公司 | Urban track traffic electronic ＆ mechanic machine control system |
| CN115314554A (en) * | 2022-09-26 | 2022-11-08 | 北京城建设计发展集团股份有限公司 | Data access method, device and system of rail transit heterogeneous system |
| CN115314554B (en) * | 2022-09-26 | 2024-01-26 | 北京城建设计发展集团股份有限公司 | Data access method, device and system of rail transit heterogeneous system |
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| CN101145888B (en) | 2011-08-17 |
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