CN101916101A - Fault-tolerant scheduling method of CBTC (Communication-Based Train Control) zone control system application software - Google Patents
Fault-tolerant scheduling method of CBTC (Communication-Based Train Control) zone control system application software Download PDFInfo
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Abstract
The invention discloses a fault-tolerant scheduling method of CBTC (Communication-Based Train Control) zone control system application software, comprising the steps of: dividing the CBTC zone control system application software into a plurality of different processes according to function modules; judging whether the execution results of two different versions of CBTC zone control system application software executing the same process at the same time are consistent or not, if so, respectively executing the next process by the two versions of software, or else, performing fault-safety treatment; and if the two execution results of all the processes are consistent, outputting the final execution result. The function modules comprise a mobile authority limit computation function module, a train management function module, a train sequencing function module, an updating rail occupation status function module, a train safety position computation function module and a communication state supervision function module. The invention can better guarantee safety from a software mechanism, thereby improving the safety of the system and enhancing the operation efficiency of the zone control software.
Description
Technical field
The train safe control technology field that the present invention relates to communicate by letter, particularly a kind of CBTC area control system application software fault-tolerant scheduling method.
Background technology
Area control system is the important component part of CBTC system, main be responsible for orbit occupancy/idle information that route that the positional information of reporting according to the communication train and interlocking arrange and the other equipment of rail provide, for calculating to generate to move, the communication train in its range of control authorizes, guarantee the safe operation of its control zone intra-area communication train, possess the ability of carrying out Train Management under various Train Control grades and driving model, its reliabilty and availability is related to the smooth operation and the operational efficiency of whole C BTC system.
One of gordian technique that guarantees the area control system high security is exactly the safe operation that guarantees the area control system application software.At present, the CBTC system is 200ms to the real-time requirement of Region control equipment, guarantees that the basic measures of area control system application software safety have two aspects: the one, and improve and carry out efficient; The 2nd, can in the shortest time, detect the inefficacy of software, avoid fault propagation.In the current C BTC system, the Region control application software processing policy that the equipment supplier generally adopts is that all functions software is packaged into a software process, be embedded in the scheduler program of hardware platform, there are a lot of shortcomings in this mode, is unfavorable for system high efficiency, operation safely.In the existing processing scheme, the system hardware platform is only handled and the final output result of the whole application software of surveyed area control system, and the middle operational process of using software is not carried out verification.By the processing horizontal of present hardware platform, application software is carried out in the scheduling process needs about 150ms, and the edge that requires near real-time in case hardware platform is interfered, causes execution cycle not satisfy probably, causes fault.Yet area control system comprises a lot of different functional modules, and is separate between some module, also is not quite similar for system's security of operation role and importance.At these characteristics of area control system, there are the following problems for existing processing policy:
1, data processing can't fully detect the intermediate logic process with the verification Train Control just at the final output result of software;
2, algorithm is single, is unfavorable for improving the operational efficiency of application software in hardware platform, is difficult to requirement of real time;
In case the simple function function starts a leak in 3 softwares, have little time the direct output that influences system of detection meeting, potential safety hazard is arranged.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: how to detect the intermediate result of CBTC area control system software, improve the system software operational efficiency, simultaneously the security and the real-time of enhanced system.
(2) technical scheme
A kind of CBTC area control system application software fault-tolerant scheduling method may further comprise the steps:
S1: CBTC area control system application software is divided into some different processes by functional module;
S2: whether the execution result of CBTC area control system application software of judging two different editions carrying out same process simultaneously is consistent, if it is consistent, show that then this process processing is correct, the application software of described two versions continues to carry out separately next process, otherwise carrying out fail-safe handles, if two execution results of all processes are all consistent, then export final execution result.
Wherein, functional module comprises among the described step S1:
Move and authorize computing function module, Train Management functional module, train ranking function module, upgrade orbit occupancy status function module, train safe position counting function module and communications status supervisory role module;
Wherein, also comprise step before the described S1:
Create and the described functional module related resource of initialization, described resource comprises:
Train Management data structure: be used for train car information, comprise train position, traffic direction;
Mobile authorization data structure: be used to be stored as the mobile authorization message that train calculates;
Communication link admin table: be used for monitoring the communications status between CBTC area control system and other subsystem;
Orbit information and train contingency table: the related information that is used to store circuit and train.
Wherein, also comprise between described step S1 and the step S2:
For the process of each this functional module correspondence priority is set by the safe class of each functional module, moving and authorizing the process of computing function module and communications status supervisory role module is high priority process, the process of Train Management functional module, train ranking function module and train safe position counting function module is the medium priority process, and the process of upgrading orbit occupancy status function module is a low priority process.
Wherein, by the priority of process order executive process from high to low, specifically comprise among the described step S2:
Carry out high priority process:
Executive communication state supervision process, the result compares to output, if more inconsistent synchronously, system will stop carrying out all processes and the failure to the safe side processing, and empty the communication link admin table;
Carry out to move and authorize calculation procedure, the result compares to output, if it is more inconsistent synchronously, then will send the mobile mandate of buffer memory of last one-period to train, if more inconsistent continuously periodicity surpasses the threshold value of setting, system will stop carrying out all processes and failure to the safe side is handled, and empty that corresponding train moves authorization message in the mobile authorization data structure;
Carry out the medium priority process:
Carry out and calculate train home process, the result compares to output, if more inconsistent synchronously, then train position carried out envelope and handles;
Carry out train ordering process, the result compares to output, if more inconsistent synchronously, then empties the orbit information of train ordering process use and the train information in the train contingency table;
Carry out the Train Management process, the result compares to output, if more inconsistent synchronously, then this train is carried out fault handling, and train status in orbit information and the train contingency table is changed to the acquiescence fault case;
Carry out low priority process:
Carry out and upgrade the orbit occupancy state course, the result compares to output, if more inconsistent synchronously, the result carries out checking treatment to output.
(3) beneficial effect
The present invention has carried out the division of flexible science with the function that area control system is realized, with the fault-tolerant pilot process that relatively is applied to running software, fault-tolerant scheduling mechanism is more reasonable, helps system's security of operation more, has following beneficial effect:
1, technical scheme of the present invention is all carried out two version verification supervision to six functional module processes of dividing, find wrong can the processing in the very first time, can not allow fault propagation arrive other module, can ensure safety from software mechanism better, improve the security of system;
2, each process is reasonably dispatched, improved the operational efficiency of Region control software.
Description of drawings
Fig. 1 is to system software functional module division figure in the CBTC area control system application software fault-tolerant scheduling method of the present invention;
Fig. 2 is a CBTC area control system application software fault-tolerant scheduling method process flow diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, the present invention is divided into following six functional modules to CBTC area control system application software by function, exist different data stream mutual between each functional module, content according to different data streams is set a safe class for each functional module, as the foundation that the difference in functionality module is called.
Move and authorize the computing function module, the line facility status information that area control system provides according to interlock device, section status information, track switch status information etc. are determined the traffic direction of corresponding train and the operation authority of train.
The Train Management functional module, when moving in the compass of competency of train at zone controller, according to the residing different running statuses of train, zone controller need be finished corresponding processing, to guarantee the safe and highly efficient operation of train.
Train ranking function module is mainly finished the differentiation of the train of operation on the line, by the circuit situation that the information and the interlocking of train report are reported, comprehensively determines the context of train.
Upgrade orbit occupancy status function module, area control system is determined line holding/idle condition under the CBTC rank to realize the location to the communication train that moves on the circuit in conjunction with the taking of meter axle section/idle information and train position information.
Calculate train home functional module, the non-home of train is the most probable physical location of train, the non-home information that area control system is reported according to train, factors such as present speed, range error and communication delay in conjunction with train, for the communication train adds certain safe envelope, determining the home of train, and after processing in this home of use.
Communications status supervisory role module, area control system should be supervised the safe related system of communication with it constantly, and confirm constantly whether the communications status of interactive subsystem is good with it, when checking the communication failure of finding to be present in ground subsystem, equipment train in the notice coverage is implemented brake hard, guarantee train operating safety.
As shown in Figure 2, be the process flow diagram of a preferred embodiment of the invention.
At first, by the functional module of above-mentioned CBTC area control system application software, create and the initialization related resource, related resource comprises:
Train Management data structure: be used for train car information, comprise train position, traffic direction.
Mobile authorization data structure: be used to be stored as the mobile authorization message that train calculates.
Communication link admin table: be used for monitoring the communications status between CBTC area control system and other subsystem.
Orbit information and train contingency table: the related information that is used to store circuit and train.
Be process of establishment of each functional module, and the priority of corresponding process is set by the safe class of each functional module.Moving and authorizing the process of computing function module and communications status supervisory role module is high priority process, the process of Train Management functional module, train ranking function module and train safe position counting function module is the medium priority process, and the process of upgrading orbit occupancy status function module is a low priority process.
Read above-mentioned process, the above-mentioned application software that adopts two different editions according to priority from high to low order is carried out above-mentioned each process, during execution, each process is carried out in two application software simultaneously, and output execution result, each execution result is carried out two versions compare synchronously, promptly compare the consistance of two different editions application software to the result of same process execution, specifically execution and comparison procedure are as follows:
Carry out high priority process:
Executive communication state supervision process is carried out two versions to the output result and is compared synchronously, if more inconsistent synchronously, system will stop carrying out all processes and the failure to the safe side processing, and empty the communication link admin table.
Carry out to move and authorize calculation procedure, the output result is carried out two versions to be compared synchronously, if it is more inconsistent synchronously, then will send the mobile mandate of buffer memory of last one-period to train, if more inconsistent continuously periodicity surpasses the threshold value of setting, system will stop carrying out all processes and failure to the safe side is handled, and empty that corresponding train moves authorization message in the mobile authorization data structure.
Carry out the medium priority process:
Carry out the train home process of calculating, the output result is carried out two versions compare synchronously,, then train position is carried out envelope and handle if more inconsistent synchronously.
Carry out train ordering process, the output result is carried out two versions compare synchronously,, then empty the orbit information of train ordering process use and the train information in the train contingency table if more inconsistent synchronously.
Carry out the Train Management process, the output result is carried out two versions compare synchronously, if more inconsistent synchronously, then this train is carried out fault handling, and train status in orbit information and the train contingency table is changed to the acquiescence fault case.
Low priority process is handled:
Carry out and upgrade the orbit occupancy state course, the output result is carried out two versions compare synchronously,, this information is carried out checking treatment if more inconsistent synchronously.
The result who carries out above-mentioned certain process is carried out two versions when relatively more consistent synchronously, check whether above-mentioned all processes are disposed, finish if be untreated, return and read process steps, if dispose and two versions of above-mentioned each process execution result unanimity more all synchronously, then export final execution result, wherein comprise the output information after each process overall treatment.
This programme and existing scheme have been carried out 24 hours efficient contrast experiments based on same hardware platform, based on average cycle of operation of area control system application software of prior art scheme be 148ms; Utilize application software fault-tolerant scheduling method of the present invention, the average cycle of operation of area control system application software is 56ms.
Above embodiment only is used to illustrate the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (5)
1. a CBTC area control system application software fault-tolerant scheduling method is characterized in that, may further comprise the steps:
S1: CBTC area control system application software is divided into some different processes by functional module;
S2: whether the execution result of CBTC area control system application software of judging two different editions carrying out same process simultaneously is consistent, if it is consistent, the application software of then described two versions continues to carry out separately next process, otherwise carrying out fail-safe handles, if two execution results of all processes are all consistent, then export final execution result.
2. CBTC area control system application software fault-tolerant scheduling method as claimed in claim 1 is characterized in that functional module comprises among the described step S1:
Move and authorize computing function module, Train Management functional module, train ranking function module, upgrade orbit occupancy status function module, train safe position counting function module and communications status supervisory role module.
3. CBTC area control system application software fault-tolerant scheduling method as claimed in claim 2 is characterized in that, also comprises step before the described S1:
Create and the described functional module related resource of initialization, described resource comprises:
Train Management data structure: be used for train car information, comprise train position, traffic direction;
Mobile authorization data structure: be used to be stored as the mobile authorization message that train calculates;
Communication link admin table: be used for monitoring the communications status between CBTC area control system and other subsystem;
Orbit information and train contingency table: the related information that is used to store circuit and train.
4. CBTC area control system application software fault-tolerant scheduling method as claimed in claim 3 is characterized in that, also comprises between described step S1 and the step S2:
For the process of each this functional module correspondence priority is set by the safe class of each functional module, moving and authorizing the process of computing function module and communications status supervisory role module is high priority process, the process of Train Management functional module, train ranking function module and train safe position counting function module is the medium priority process, and the process of upgrading orbit occupancy status function module is a low priority process.
5. CBTC area control system application software fault-tolerant scheduling method as claimed in claim 4 is characterized in that, by the priority of process order executive process from high to low, specifically comprises among the described step S2:
Carry out high priority process:
Executive communication state supervision process, the result compares to output, if more inconsistent synchronously, system will stop carrying out all processes and the failure to the safe side processing, and empty the communication link admin table;
Carry out to move and authorize calculation procedure, the result compares to output, if it is more inconsistent synchronously, then will send the mobile mandate of buffer memory of last one-period to train, if more inconsistent continuously periodicity surpasses the threshold value of setting, system will stop carrying out all processes and failure to the safe side is handled, and empty that corresponding train moves authorization message in the mobile authorization data structure;
Carry out the medium priority process:
Carry out and calculate train home process, the result compares to output, if more inconsistent synchronously, then train position carried out envelope and handles;
Carry out train ordering process, the result compares to output, if more inconsistent synchronously, then empties the orbit information of train ordering process use and the train information in the train contingency table;
Carry out the Train Management process, the result compares to output, if more inconsistent synchronously, then this train is carried out fault handling, and train status in orbit information and the train contingency table is changed to the acquiescence fault case;
Carry out low priority process:
Carry out and upgrade the orbit occupancy state course, the result compares to output, if more inconsistent synchronously, the result carries out checking treatment to output.
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| CN102902603A (en) * | 2012-09-27 | 2013-01-30 | 南京师范大学 | Data parallel computing-oriented fault-tolerant method |
| CN103723168A (en) * | 2013-12-18 | 2014-04-16 | 北京交控科技有限公司 | CBTC train number window and track section occupancy synchronous display system |
| CN109383563A (en) * | 2017-08-08 | 2019-02-26 | 比亚迪股份有限公司 | Train home calculation method, device and storage medium |
| CN110794816A (en) * | 2019-11-28 | 2020-02-14 | 安徽江淮汽车集团股份有限公司 | Method, device, equipment and storage medium for adjusting fault tolerance of vehicle controller software |
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| CN110794816A (en) * | 2019-11-28 | 2020-02-14 | 安徽江淮汽车集团股份有限公司 | Method, device, equipment and storage medium for adjusting fault tolerance of vehicle controller software |
| CN110794816B (en) * | 2019-11-28 | 2020-08-04 | 安徽江淮汽车集团股份有限公司 | Method, device, equipment and storage medium for adjusting fault tolerance of vehicle controller software |
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