CN101431391A - Method for improving dynamic coding packet security of train control system - Google Patents
Method for improving dynamic coding packet security of train control system Download PDFInfo
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- CN101431391A CN101431391A CNA2008102396313A CN200810239631A CN101431391A CN 101431391 A CN101431391 A CN 101431391A CN A2008102396313 A CNA2008102396313 A CN A2008102396313A CN 200810239631 A CN200810239631 A CN 200810239631A CN 101431391 A CN101431391 A CN 101431391A
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Abstract
The invention discloses a method for improving the security of a dynamic coding message of a train control system in the technical field of railway signal. The technical proposal of the method comprises the following steps: after a train control central system normally works, access way information, temporary speed restriction information and other data are received; if the received data is new, a 830 bit user message is generated; the 830 bit user message which is dynamically generated is compared with a message which is statically stored according to bit; if comparison results keep consistent, the dynamically generated 830 bit user message is coded according to a message coding algorithm and outputted to a side tracking electronic unit to take down the coded message to a history record list; if comparison results are not consistent for three times consecutively, the message is returned to a backup machine for further comparison; if comparison results on the backup machine are not consistent for three times consecutively, only a default message of the train control center is transmitted. The invention uses the static message to detect key parameters of the dynamic coding message so as to improve the message processing security of a responder based on dynamic coding technology.
Description
Technical field
The invention belongs to the railway signal technology field, relate in particular to a kind of method that improves dynamic coding packet security of train control system.
Background technology
China railways CTCS-2 (China Train Control System, Chinese train control system) level train control system adopts some gang mould formula control train operation.Point is a dot-mode transponder, and connecting is continuous track circuit.Transponder technology is the technology that China introduces from Europe, the function of transponder is to provide crucial car controlling information to train-installed equipment, as packets of information such as inlet wire road speed, line slope, track section, temporary speed limitations, these packets of information are referred to as the transponder message through combination and coding.
The transponder message is the message that is related to traffic safety, the correctness that message calculates is the key of system, therefore no matter be existing alignment control or the control of Line for Passenger Transportation row, the supply commercial city of equipment the establishment of transponder message, generation and engineering construction as one independently link manage, strengthened the test stage of message, guarantee the correctness of message, improve the fail safe of system with this.
In the CTCS-2 level train control system of having implemented, existing alignment control center and objective special train control center all are to adopt the mode of selecting the static storage message, when equipment dispatches from the factory, the initial data that row control center manufacturer provides according to road bureau and designing institute, establishment transponder message.
The principle basis of establishment is No. 224 files of the Ministry of Railways " definition of existing line CTCS-2 level section transponder message and application of principle (provisional) ", the message of active balise is classified according to route, is divided into main track and connects that car, main track are dispatched a car, side line connects car, side line is dispatched a car, these route content of message, regulation according to No. 224 literary compositions, comprise transponder and connect bag, line speed bag, line slope bag, the track section bag, the temporary speed limitation bag, large size track switch bag, inverted running bag or the like.In the temporary speed limitation bag, need travel through according to the condition of temporary speed limitation, the foundation of temporary speed limitation traversal is: starting point (100 meters filings), length (dividing 8 grades altogether for 100～6000 meters), speed limit (45～160km/h divides 5 grades altogether).
We are referred to as user's message to the message that meets above-mentioned condition, according to the form of user's message, generate 830 user's messages, and then according to transponder message coding principle, generate 1023 transponder message.
Transponder message behind the coding is stored on the master control integrated circuit board at row control center, during row control center operate as normal, understand according to initial conditions: the route condition of interlocking and CTC (Centralized Traffic Control, dispatching concentration control) temporary speed limitation condition, from all messages, select a qualified message, be sent to the outdoor active transponder.
Mainly there is following problem in the transponder message processing procedure of this storage-selection-transmission:
First: temporary speed limitation must be according to certain rule filing (starting point, length, speed limit), could guarantee the finiteness of the transponder message amount that traversal generates, even filing like this, major station, the interval temporary speed limitation message total amount of growing up have also reached more than the 10M, and the memory space of control system has been proposed very high requirement.
Second: the temporary speed limitation after the filing, the speed limit section length after the filing of row control center is general all greater than the speed limit district of actual needs, and speed restriction generally all is lower than the speed limit of actual needs, to transportation department, has sacrificed a lot of efficient.
The 3rd: if do not sacrifice efficient, improve the precision of starting point, length and speed limit in the filing principle, the quantity of message is bigger, and is higher to the memory space requirement of system, also brings very big difficulty to data generation and data management.
We are according to the shortcoming of the prior art of having used, studied multiple scheme, a kind of scheme wherein-employing dynamic coding replaces original storage to select send mode, has formed patent " dynamic message encoding method of train control system " (patent No. 200710176440.2).Described how to substitute the storage-selection-send mode that has now in the train control system in the literary composition, realized the dynamic coding of transponder message with the dynamic coding technology.
The dynamic coding technology can solve the problem that original storage-selection-send mode exists basically, but because the dynamic coding technology does not still have ripe the application in train control system, the fail safe shortage of dynamic coding packet guarantees.In order to ensure the fail safe of the message of dynamic coding, be necessary to invent a kind of method of message correctly check, the method that the static storage that the present invention that Here it is will propose combines with dynamic coding.
Summary of the invention
The objective of the invention is to, a kind of method that improves dynamic coding packet security of train control system is provided, adopt the static storage message to detect the correctness of dynamic coding packet, solve current train control system lacks assurance based on the transponder message treatment technology fail safe of dynamic coding technology problem.
Technical scheme of the present invention is that a kind of method that improves dynamic coding packet security of train control system is characterized in that described method comprises the following steps:
Step 1: judge whether row control centring system state is normal;
Step 2: if system mode is undesired, then show fault alarm, system can not come into operation;
Step 3:, judge whether the message history table is empty if system mode is normal; If the message history table is empty, then jump to step 4; Otherwise, jump to step 5;
Step 4: create the message history table;
Step 5: row control centring system receives data, comprises route information and temporary speed limitation information;
Step 6: judge whether the data that receive are new data; If the data that receive are not new datas, then jump to step 7; If the data that receive are new datas, then jump to step 8;
Step 7: extract the message behind the coding in last cycle, jump to step 13;
Step 8: row control centring system generates 830 user's messages according to the new data that receives;
Step 9: according to the label of route information, select the route message of static storage, 830 user's messages that dynamically generate are pressed bit comparison with the message of static storage;
Step 10: judge whether comparative result is consistent; If the comparative result unanimity then jumps to step 12;
Step 11:, judge again whether the inconsistent number of times of continuous comparative result reaches 3 times if comparative result is inconsistent; If do not reach 3 times, then jump to step 8, regenerate 830 user's messages; If reach 3 times, jump to step 15;
Step 12: according to the message coding algorithm, 830 user's message codings to dynamic generation generate 1023 messages;
Step 13: the message after will encoding outputs to the other electronic unit of rail;
Step 14: the message after will encoding again writes history table, jumps to step 20;
Step 15: main frame returns fault alarm information, switches to standby host;
Step 16: 830 user's messages that on standby host, dynamically generate and the message of static storage by bit comparison;
Step 17: judge whether comparative result is consistent; If the comparative result unanimity then jumps to step 12;
Step 18:, judge again whether the inconsistent number of times of continuous comparative result reaches 3 times if comparative result is inconsistent; If do not reach 3 times, then jump to step 16, continue relatively;
Step 19:, then only send the acquiescence message at row control center if reach 3 times;
Step 20: finish.
The message of described 830 user's messages that will dynamically generate and static storage is by bit comparison, content relatively comprises: message frame head, transponder link bag, line speed bag, line slope bag, track section bag and temporary speed limitation bag perhaps include only message frame head, transponder link bag, line speed bag, line slope bag and track section bag.
Effect of the present invention is, utilize static message to check the key parameter of dynamic coding packet, not only improved transponder message processing security based on the dynamic coding technology, also kept the dynamic coding technology simultaneously in transponder message processing procedure, save memory space, the characteristic that treatment effeciency is high.
Description of drawings
Fig. 1 is the flow chart that improves the method for dynamic coding packet security of train control system.
Embodiment
Consider from row control centre code process, the foundation of message design principle and cryptoprinciple is the design document of the Ministry of Railways, in " dynamic message encoding method of train control system " patent (patent No. 200710176440.2), more detailed elaboration has been arranged, directly quoted some results here.
In order to strengthen the fail safe of dynamic coding packet, from row control center main control software angle, in the message coding process, increase test stage, promptly the message that dynamic coding is generated is tested.And the standard of check is the message of static storage.
Row control center configuration data comprise following content:
1) basic data: our station route table, transponder location table, gradient table, speedometer, track regions segment table.
2) static message data: the static message of the transponder correspondence of our station administration.
Fig. 1 is the flow chart that improves the method for dynamic coding packet security of train control system.Among Fig. 1, step 101: when the flow process of this method begins, will judge at first whether row control centring system state is normal.
Step 102: if system mode is undesired, then show fault alarm, system can not come into operation.
Step 103:, judge then whether the message history table is empty if system mode is normal; The message historical record is used for the message that record outputs to LEU (Line Electronic Unit, the other electronic unit of rail).If the message history table is empty, then jump to step 104; Otherwise, jump to step 105.
Step 104: create the message history table.
Step 105: row control centring system receives data, comprises route information and temporary speed limitation information.
Step 106: judge whether the data that receive are new data; If the data that receive are not new datas, then jump to step 107; If the data that receive are new datas, then jump to step 108.
Step 107: extract the message behind the coding in last cycle, jump to step 113, carry out LEU output.
Step 108: row control centring system generates 830 user's messages according to the new data that receives.The packet content of transponder, frame format such as following table (the data packet frame form of transponder):
The data packet frame form of table 1 transponder
User profile bag wherein comprises again: transponder link bag (ETCS-5), and line slope bag (ETCS-21), line speed bag (ETCS-27), CTCS wraps (ETCS-44), track section bag (CTCS-1) and temporary speed limitation bag (CTCS-2).Below list the structure of each table respectively, wherein: table 2 is that structure, table 3 that transponder connects bag (ETCS-5) are that structure, the table 4 of line slope bag (ETCS-21) is that structure, the table 5 of line speed bag (ETCS-27) is that structure, the table 6 of CTCS bag (ETCS-44) is that structure, the table 7 of track section bag (CTCS-1) is structures of temporary speed limitation bag (CTCS-2).
Table 2 transponder connects the structure of bag
Table 3 is structures of line slope bag
The structure of table 4 line speed bag
The structure of table 5 CTCS bag
The structure of table 6 track section
The structure of table 7 temporary speed limitation bag
According to above-mentioned data, generate 830 user's message.
Step 109: according to the label of route information, select the route message of static storage, by bit comparison, content relatively comprises: message frame head, transponder link bag, line speed bag, line slope bag, track section bag and temporary speed limitation bag with the message of 830 user's messages dynamically generating and static storage.When considering dynamic coding, the precision of temporary speed limitation and message amount, if the message that each bar dynamically produces all compares with the message of a static storage, then the space to static storage has proposed very high requirement, may be not suitable for like this checking with static message, so in the user's message that dynamically generates, the packets of information of temporary speed limitation can be not content as a comparison.Therefore, Bi Jiao content can include only message frame head, transponder link bag, line speed bag, line slope bag and track section bag.
Step 110: judge whether comparative result is consistent; If the comparative result unanimity then jumps to step 112;
Step 111:, judge again whether the inconsistent number of times of continuous comparative result reaches 3 times if comparative result is inconsistent; If do not reach 3 times, then jump to step 108, regenerate 830 user's messages; If reach 3 times, jump to step 115;
Step 112: according to the message coding algorithm, 830 user's message codings to dynamic generation generate 1023 messages;
Step 113: the message after will encoding outputs to the other electronic unit LEU of rail;
Step 114: the message after will encoding again writes history table, jumps to step 20;
Step 115: main frame returns fault alarm information, switches to standby host;
Step 116: 830 user's messages that on standby host, dynamically generate and the message of static storage by bit comparison;
Step 117: judge whether comparative result is consistent; If the comparative result unanimity then jumps to step 112;
Step 118:, judge again whether the inconsistent number of times of continuous comparative result reaches 3 times if comparative result is inconsistent; If do not reach 3 times, then jump to step 116, continue relatively;
Step 119:, then only send the acquiescence message at row control center if reach 3 times;
Step 120: finish.
Except method provided by the invention, the fail safe of transponder message, can also realize by the transponder remote monitoring, this method has been write as the patent application document (patent No.: 200710176445.5) that name is called " a kind of remote monitoring method for answering machine ", the method of this remote monitoring is an end point detection, and the method for the static message detection of the usefulness that the present invention proposes dynamic coding packet is a front-end detection, two kinds of detection mode differences.Compare with the transponder remote monitoring, that the advantage of method provided by the invention is to invest is little, income is big, has more Application Prospect.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (2)
1, a kind of method that improves dynamic coding packet security of train control system is characterized in that described method comprises the following steps:
Step 1: judge whether row control centring system state is normal;
Step 2: if system mode is undesired, then show fault alarm, system can not come into operation;
Step 3:, judge whether the message history table is empty if system mode is normal; If the message history table is empty, then jump to step 4; Otherwise, jump to step 5;
Step 4: create the message history table;
Step 5: row control centring system receives data, comprises route information and temporary speed limitation information;
Step 6: judge whether the data that receive are new data; If the data that receive are not new datas, then jump to step 7; If the data that receive are new datas, then jump to step 8;
Step 7: extract the message behind the coding in last cycle, jump to step 13;
Step 8: row control centring system generates 830 user's messages according to the new data that receives;
Step 9: according to the label of route information, select the route message of static storage, 830 user's messages that dynamically generate are pressed bit comparison with the message of static storage;
Step 10: judge whether comparative result is consistent; If the comparative result unanimity then jumps to step 12;
Step 11:, judge again whether the inconsistent number of times of continuous comparative result reaches 3 times if comparative result is inconsistent; If do not reach 3 times, then jump to step 8, regenerate 830 user's messages; If reach 3 times, jump to step 15;
Step 12: according to the message coding algorithm, 830 user's message codings to dynamic generation generate 1023 messages;
Step 13: the message after will encoding outputs to the other electronic unit of rail;
Step 14: the message after will encoding again writes history table, jumps to step 20;
Step 15: main frame returns fault alarm information, switches to standby host;
Step 16: 830 user's messages that on standby host, dynamically generate and the message of static storage by bit comparison;
Step 17: judge whether comparative result is consistent; If the comparative result unanimity then jumps to step 12;
Step 18:, judge again whether the inconsistent number of times of continuous comparative result reaches 3 times if comparative result is inconsistent; If do not reach 3 times, then jump to step 16, continue relatively;
Step 19:, then only send the acquiescence message at row control center if reach 3 times;
Step 20: finish.
2, a kind of method that improves dynamic coding packet security of train control system according to claim 1, the message that it is characterized in that described 830 user's messages that will dynamically generate and static storage is by bit comparison, content relatively comprises: message frame head, transponder link bag, line speed bag, line slope bag, track section bag and temporary speed limitation bag perhaps include only message frame head, transponder link bag, line speed bag, line slope bag and track section bag.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102316020A (en) * | 2011-05-16 | 2012-01-11 | 铁道部运输局 | Method for generating and sending transponder messages in real time, as well as train control center device and system |
| CN102320316A (en) * | 2011-05-16 | 2012-01-18 | 铁道部运输局 | CTCS-3-level train control center system |
| CN102437898A (en) * | 2011-12-15 | 2012-05-02 | 北京和利时系统工程有限公司 | System and method for highspeed rail to generate transponder massage in real time |
| CN102932030A (en) * | 2012-10-15 | 2013-02-13 | 华为技术有限公司 | Transponder message processing method and vehicle-mounted equipment |
| CN105119667A (en) * | 2015-07-14 | 2015-12-02 | 河南蓝信科技股份有限公司 | Lineside electronic unit (LEU) tester |
| CN105667544A (en) * | 2016-01-05 | 2016-06-15 | 卡斯柯信号有限公司 | Automatic protection system for tramcar |
| CN108082213A (en) * | 2017-11-10 | 2018-05-29 | 北京全路通信信号研究设计院集团有限公司 | Route control method and device, computer storage media based on static locking sheet |
| CN108111261A (en) * | 2017-11-10 | 2018-06-01 | 北京全路通信信号研究设计院集团有限公司 | Searching matrix generation method and message searching method |
| CN114401147A (en) * | 2022-01-20 | 2022-04-26 | 山西晟视汇智科技有限公司 | New energy power station communication message comparison method and system based on abstract algorithm |
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Family Cites Families (1)
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| CN101174921B (en) * | 2007-10-29 | 2011-04-20 | 北京佳讯飞鸿电气股份有限公司 | Dynamic message encoding method of train control system |
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2008
- 2008-12-12 CN CN2008102396313A patent/CN101431391B/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102316020A (en) * | 2011-05-16 | 2012-01-11 | 铁道部运输局 | Method for generating and sending transponder messages in real time, as well as train control center device and system |
| CN102320316A (en) * | 2011-05-16 | 2012-01-18 | 铁道部运输局 | CTCS-3-level train control center system |
| CN102316020B (en) * | 2011-05-16 | 2014-06-25 | 铁道部运输局 | Method for generating and sending transponder messages in real time, as well as train control center device and system |
| CN102437898A (en) * | 2011-12-15 | 2012-05-02 | 北京和利时系统工程有限公司 | System and method for highspeed rail to generate transponder massage in real time |
| CN102932030A (en) * | 2012-10-15 | 2013-02-13 | 华为技术有限公司 | Transponder message processing method and vehicle-mounted equipment |
| CN102932030B (en) * | 2012-10-15 | 2015-01-21 | 华为技术有限公司 | Transponder message processing method and vehicle-mounted equipment |
| CN105119667A (en) * | 2015-07-14 | 2015-12-02 | 河南蓝信科技股份有限公司 | Lineside electronic unit (LEU) tester |
| CN105667544A (en) * | 2016-01-05 | 2016-06-15 | 卡斯柯信号有限公司 | Automatic protection system for tramcar |
| CN108082213A (en) * | 2017-11-10 | 2018-05-29 | 北京全路通信信号研究设计院集团有限公司 | Route control method and device, computer storage media based on static locking sheet |
| CN108111261A (en) * | 2017-11-10 | 2018-06-01 | 北京全路通信信号研究设计院集团有限公司 | Searching matrix generation method and message searching method |
| CN108111261B (en) * | 2017-11-10 | 2021-02-02 | 北京全路通信信号研究设计院集团有限公司 | Search matrix generation method and message search method |
| WO2022134880A1 (en) * | 2020-12-23 | 2022-06-30 | 卡斯柯信号有限公司 | Reliability protection method for real-time scrambled packet transmission of train control center system |
| CN114401147A (en) * | 2022-01-20 | 2022-04-26 | 山西晟视汇智科技有限公司 | New energy power station communication message comparison method and system based on abstract algorithm |
| CN114401147B (en) * | 2022-01-20 | 2024-02-20 | 山西晟视汇智科技有限公司 | New energy power station communication message comparison method and system based on abstract algorithm |
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