CN102437898A - System and method for highspeed rail to generate transponder massage in real time - Google Patents
System and method for highspeed rail to generate transponder massage in real time Download PDFInfo
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- CN102437898A CN102437898A CN2011104217042A CN201110421704A CN102437898A CN 102437898 A CN102437898 A CN 102437898A CN 2011104217042 A CN2011104217042 A CN 2011104217042A CN 201110421704 A CN201110421704 A CN 201110421704A CN 102437898 A CN102437898 A CN 102437898A
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Abstract
The invention provides a system and a method for a highspeed rail to generate a transponder massage in real time, relating to the technical field of communication and solving the problem of poor coding processing effect of the conventional scheme. The system comprises a main control equipment for a train control center and an interface coding plate, wherein the main control equipment for a train control center and the interface coding plate are connected by a decentralized periphery (DP) bus; one end of the interface coding plate is connected with the main control equipment for a train control center by the DP bus; and the other end of the interface coding plate is connected with a rail-side electronic unit. The technical scheme provided by the invention is suitable for rail transportation systems, and can be used for implementing high-reliability high-efficiency real-time train control.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the system and method that a kind of high-speed railway generates the transponder message in real time.
Background technology
Railway is the main transportation means of China, and in order to satisfy domestic growing speed rail commuter service needs, the effect of row control center (Train Control Center is called for short TCC) in the Chinese Railway control system more shows important.Row control center is according to track circuit section occupied information, interlocking route information; Add dispatching concentration control system (Centralized Traffic Control System; Abbreviation CTC) the temporary speed limitation information that issues produces train travel grant commands message, sends on the onboard system.Driving permission message is control train operation order, and the correctness of information directly has influence on the safety of driving, utilizes message scrambler algorithm described in the Europe superscript SUBSET-036 to come the correctness of guarantee information.The existing following 2 kinds of schemes of existing message compilation process:
1, the independent message making software instrument of exploitation is encoded through this software message of will drive a vehicle, and it is saved in row control central apparatus, and the confession master control system reads;
2, directly the message coding software algorithm is transplanted to row control center main control software, sends to onboard system according to condition generation message and after encoding.
By stand alone software establishment message, master control is directly read coding message and is carried out car controlling, though the master control processing procedure is easier, also has a lot of drawbacks in the existing scheme 1.At first, the message compilation process is very complicated, analyze and enumerate the message information that an all situations occurs, needs special team to encode then, and guarantees the correctness of its cataloged procedure; The second, the workload of coding is very big, and each station situation is all different, and the workload of message coding is very big; The 3rd, the application message limitation, message needs manual work to enumerate, and partial information can be very low such as resolution such as speed, length.
Can realize the autocoding function in the existing scheme 2,, must take very big processor resource and concerning the safety means of real-time control, have very big risk because the encryption algorithm operand is bigger.
To sum up, existing scheme encoding process effect is relatively poor.
Summary of the invention
The invention provides the system and method that a kind of high-speed railway generates the transponder message in real time, solved the relatively poor problem of existing scheme encoding process effect.
A kind of high-speed railway generates the system of transponder message in real time, comprises row control center main control device and interface encoding board, between said row control center main control device and the said interface encoding board through disperseing peripheral bus (DP bus) to link to each other;
Said interface encoding board one end links to each other with said row control center main control device through said DP bus, and the other end links to each other with the other electronic unit of rail;
Said row control center main control device is used to generate train travel grant commands message, and through said message transmissions interface the train travel grant commands message that generates is sent to said interface encoding board;
Said interface encoding board; Be used to receive the train travel grant commands message that said row control center main control device sends through said message transmissions interface; And according to the algorithm that presets said train travel grant commands message is encoded, the train travel grant commands message behind the coding is sent to the other electronic unit (LEU) of said rail.
Preferably, the transmission of garage's car grant commands message is ranked in 830 of said DP bus supports or 1023.
Preferably; Said interface encoding board comprises that the identical first cover circuit and second of structure overlaps circuit totally two cover circuit; Said first cover circuit and the said second cover circuit are two and get two circuit; Said first cover circuit and the common formation two of the said second cover circuit take advantage of two to get two circuit, and the CPU of the said first cover circuit is connected through universal serial bus with the CPU of the said second cover circuit.
Preferably, the CPU of the CPU of the said first cover circuit and the said second cover circuit is specially FPGA.
The present invention also provides a kind of high-speed railway to generate the transponder method of message in real time, comprising:
Row control center main control device generates train travel grant commands message, and said train travel grant commands message is sent to the interface encoding board;
Said interface encoding board is encoded to said train travel grant commands message according to the encryption algorithm that presets, and the train travel grant commands message after will encoding is sent to LEU.
Preferably, said row control center main control device generation train travel grant commands message comprises:
Said row control center main control device generates train travel grant commands message according to track circuit section physical data, occupied information, route information, line information and temporary speed limitation information.
Preferably, the size of the train travel grant commands message of said row control center main control device generation is 830 (bit) or 1023bit.
Preferably, said interface encoding board is encoded to said train travel grant commands message according to the encryption algorithm that presets and is comprised:
When the train travel grant commands message that main control device sends at said row control center is 830bit, be 1023bit with said train travel grant commands message coding, and the train travel grant commands message after will encoding is sent to LEU.
Preferably, above-mentioned high-speed railway generates the transponder method of message in real time and also comprises:
When the said interface encoding board train travel grant commands message that main control device sends at said row control center was 1023bit, the said train travel grant commands of transparent transmission message was given said LEU.
The invention provides the system and method that a kind of high-speed railway generates the transponder message in real time; Row control center main control device generates train travel grant commands message; And said train travel grant commands message sent to the interface encoding board, said interface encoding board is encoded to said train travel grant commands message according to the encryption algorithm that presets, and the train travel grant commands message after will encoding is sent to LEU; Accomplish coding forwarding by the interface encoding board that is specifically designed to coding to train travel grant commands message; Realize high efficient coding, guaranteed the real-time of system, solved the relatively poor problem of existing scheme encoding process effect.
Description of drawings
A kind of high-speed railway that Fig. 1 provides for embodiments of the invention one generates the structural representation of the system of transponder message in real time;
Fig. 2 gets the structural representation of the circuit kit in two circuit for interface encoding board among Fig. 1 inner two;
Fig. 3 is for being the structural representation that two of CPU gets the circuit kit in two circuit with FPGA;
A kind of fast railway that Fig. 4 provides for embodiments of the invention generates transponder method of message flow chart in real time;
Fig. 5 gets two circuit are accomplished computing according to the Subset036 step principle schematic for shown in Figure 3 two.
Embodiment
The message compilation process has following two kinds of existing schemes:
1, the independent message making software instrument of exploitation is encoded through this software message of will drive a vehicle, and it is saved in row control central apparatus, and the confession master control system reads;
2, directly the message coding software algorithm is transplanted to row control center main control software, sends to onboard system according to condition generation message and after encoding.
By stand alone software establishment message, master control is directly read coding message and is carried out car controlling, though the master control processing procedure is easier, also has a lot of drawbacks in the existing scheme 1.At first, the message compilation process is very complicated, analyze and enumerate the message information that an all situations occurs, needs special team to encode then, and guarantees the correctness of its cataloged procedure; The second, the workload of coding is very big, and each station situation is all different, and the workload of message coding is very big; The 3rd, the application message limitation, message needs manual work to enumerate, and partial information can be very low such as resolution such as speed, length.
Can realize the autocoding function in the existing scheme 2,, must take very big processor resource and concerning the safety means of real-time control, have very big risk because the encryption algorithm operand is bigger.
In order to address the above problem, embodiments of the invention provide a kind of high-speed railway to generate the system and method for transponder message in real time.Hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
At first combine accompanying drawing, embodiments of the invention one are described.
The embodiment of the invention provides a kind of high-speed railway to generate the system of transponder message in real time; Its structure is as shown in Figure 1; Comprise: row control center main control device 101 and interface encoding board 102; Link to each other through the DP bus between said row control center main control device 101 and the said interface encoding board 102, adopt the Profisafe security protocol.
Said row control center main control device 101 comprises that two covers duplicate two get two circuit, constitutes one or two jointly and takes advantage of two to get two circuit structures.It is as shown in Figure 2 that wherein a cover two is got the structure of two circuit, and the framing module is made up of two circuit boards in real time: communication board and encoding board.Communication board mainly is responsible for realizing the communication protocol between row control center and the LEU, and encoding board mainly is responsible for the coding of transponder message and is realized.All circuit are identical, but must isolate on electric, so select the circuit of two cover symmetries.Two-way CPU, network interface card, DP are identical components and parts from station control, interface encoding board, adopt serial communication to carry out two of data between two CPU and get two relatively, and two CPU adopt task level synchronous.
Preferably, the high-speed railway shown in Figure 1 system that generates the transponder message in real time also comprises: CTC self-discipline machine, CTC control centre, computer interlock host computer, computer interlock slave computer, the other electronic unit (LEU) of rail and active balise.
Said interface encoding board 102 1 ends link to each other with said row control center main control device 101 through said DP bus, and the other end links to each other with LEU; Said row control center main control device 101 is used to generate train travel grant commands message, and through said message transmissions interface the train travel grant commands message that generates is sent to said interface encoding board 102; Said interface encoding board 102; Be used to receive the train travel grant commands message that said row control center main control device 101 sends through said message transmissions interface; And according to the algorithm that presets said train travel grant commands message is encoded, the train travel grant commands message behind the coding is sent to said LEU.
Below in conjunction with accompanying drawing, embodiments of the invention two are described.
The embodiment of the invention provides a kind of high-speed railway to generate the system of transponder message in real time; Concrete;, as shown in Figure 3 with field programmable gate array (FPGA) as shown in Figure 2 two CPU that get in two circuit, get two system configuration for meeting two; The circuit of FPGA also adopts symmetrical hardware configuration, guarantees the relative independentability of circuit.Two FPGA have separately power supply, crystal oscillator, configuring chip, JTAG, and (jtag interface of standard is 4 lines: TMS, TCK, TDI, TDO; Be respectively model selection, clock, data input and DOL Data Output Line) mouthful; JTAG will be designed to download and debug and the pattern of usefulness, the checking after being convenient to develop.
Below in conjunction with Fig. 1, Fig. 2 and shown in Figure 3 get the system that high-speed railway that two circuit constitute generates the transponder message in real time by two, describe using a kind of high-speed railway that embodiments of the invention provided to generate the flow process that the transponder method of message generates the transponder message in real time.Getting two circuit with shown in Figure 3 two is example, and the flow process that generates the transponder message is as shown in Figure 4, comprising:
Step 401, row control center main control device generate train travel grant commands message, and said train travel grant commands message is sent to the interface encoding board;
In this step, row control center main control device 101 is according to track circuit section occupied information, route information, line information, and temporary speed limitation information, produces train travel grant commands message.The composition of message is by static data and dynamic data two parts; Static data is that the intrinsic physical data of rail track is such as the gradient, curvature or the like; Dynamic data be the current operation situation of circuit such as temporary speed limitation, take situation; Route information etc., these two parts have determined driving grant commands message simultaneously.
Phase issues frame data to the interface encoding board to row control center main control device weekly; As; Every 50ms sends frame data (every frame can only pass 108 bytes, and corresponding 128 bytes of each active balise also have information such as check byte and frame head postamble) to the interface encoding board; Totally 5 frames are accomplished the data of 4 active balises, are every 250ms sends respectively corresponding 4 active balises continuously to the interface encoding board messages for row control center main control device promptly.
Step 402, said interface encoding board are encoded to said train travel grant commands message according to the encryption algorithm that presets, and the train travel grant commands message after will encoding is sent to LEU;
In this step, after 4 transponder data of interface encoding board group bag, 830 original message information receiving are converted into 1023 codings after message send it to LEU; And if the original message information that receives is 1023, then directly be transmitted to LEU.Afterwards, send corresponding message by LEU to 4 active balises.
Preferably; When accomplishing the coding computing with FPGA; The message coding algorithm use of interface encoding board is based on the method for DSP (Digital Signal Processing is called for short DSP) and FPGA, and the FPGA code realizes adopting standard hardware descriptive language (Very-High-Speed Integrated CircuitHardwareDescription Language; Be called for short VHDL); Implementation procedure adopts the method for streamline, will be reduced to 2～3 milliseconds the scramble time, and DSP mainly realizes and is listed as communicating by letter between the master control of control center.
Encryption algorithm carries out in strict accordance with the Subset036 step, and the algorithm realization flow is as shown in Figure 5.
The realization of encryption algorithm realizes with VHDL language, one totally receives data, calculates the summation message, calculates scrambler register initial value, circulation scrambler, 10 changes 11, calculate 85 remainders, four condition verification scheduling algorithm modules.Its computational process is as shown in Figure 5, and 12 scrambler seeds are added 10 correcting codes; One has 22 variations; If be the message that every message does not screen a total 4096K, we will select the message that meets decoding request from these 400 ten thousand scrambler processes.
The decision of encryption algorithm speed affects the real-time of system's control, and its resource has logical block, phase-locked loop, memory block, IO mouth, integrated computing kernel for FPGA, and the internal wiring resource.Fully, reasonably making good use of these internal resources is important leverages that encryption algorithm is realized.Concrete solution is following:
1, carries out frequency multiplication, frequency division with phase-locked loop, realize needed calculated rate;
2, come store look-up tables with memory block;
3, utilize Karnaugh map abbreviation logical operation formula;
4, utilize its inner integrated computing kernel to realize fast algorithm compactly;
5, the algorithm with bulk is divided into concrete some fractions, utilizes pipeline system to realize, practices thrift inner interconnection resource;
6, the designs C LISP program LISP generates a large amount of VHDL languages that repeat, need complicated abbreviation.
The related active balise of enforcement of the present invention is actual to be that row control center (mainly comprises row control center main control device and interface encoding board; LEU is the driver that interface module is communicated by letter with transponder) antenna of communicating by letter with mobile unit; An interface encoding board can be controlled 4 active balises; Each active balise function is different, so message also is different, concrete content of message is controlled by row control center main control device.
The interface encoding board weekly the phase upload frame state data to row control center main control device, two frames altogether, the status data of this CPU of frame, second frame is uploaded the status data of adjacent CPU.
Embodiments of the invention provide a kind of high-speed railway to generate the system and method for transponder message in real time; Row control center main control device generates train travel grant commands message; And said train travel grant commands message sent to the interface encoding board, said interface encoding board is encoded to said train travel grant commands message according to the encryption algorithm that presets, and the train travel grant commands message after will encoding is sent to LEU; Accomplish coding forwarding by the interface encoding board that is specifically designed to coding to train travel grant commands message; Realize high efficient coding, guaranteed the real-time of system, solved the relatively poor problem of existing scheme encoding process effect.
Message generation and message coding are divided into independently module; Promptly be listed as the master control of control center according to track circuit section occupied information, route information, line information; And temporary speed limitation information; Produce train travel grant commands message, issue then and send to mobile unit after the message interface encoding board is encoded.
Whole system is got two based on two and is taken advantage of 2 train control system, and from top to bottom, each step has all been taked the fail-safe design concept.Guaranteed whole system safety, after row control center master control two gets two message has been issued the interface encoding board, the interface encoding board is message coding, and encoding state is uploaded row control center, and two get two is handed down to LEU with message after relatively.The coding failure is found at row control center, can the temporary speed limitation zone length be added 1, issues interface encoding board coding again.The ordinary circumstance of interface encoding board can be at the left back completion coding of 1-3 millisecond; In other words; If let encoding board traversal cataloged procedure, can whenever at a distance from the 1-3 millisecond a normal coding message just appear, satisfy real-time, the security requirement of the message transmission of whole train control system.
The all or part of step that the one of ordinary skill in the art will appreciate that the foregoing description program circuit that can use a computer is realized; Said computer program can be stored in the computer-readable recording medium; Said computer program (like system, unit, device etc.) on the relevant hardware platform is carried out; When carrying out, comprise one of step or its combination of method embodiment.
Alternatively, all or part of step of the foregoing description also can use integrated circuit to realize, these steps can be made into integrated circuit modules one by one respectively, perhaps a plurality of modules in them or step is made into the single integrated circuit module and realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
Each device/functional module/functional unit in the foregoing description can adopt the general calculation device to realize, they can concentrate on the single calculation element, also can be distributed on the network that a plurality of calculation element forms.
Each device/functional module/functional unit in the foregoing description is realized with the form of software function module and during as independently production marketing or use, can be stored in the computer read/write memory medium.The above-mentioned computer read/write memory medium of mentioning can be a read-only memory, disk or CD etc.
Any technical staff who is familiar with the present technique field can expect changing or replacement in the technical scope that the present invention discloses easily, 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 described protection range of claim.
Claims (9)
1. a high-speed railway generates the system of transponder message in real time, it is characterized in that, comprises row control center main control device and interface encoding board, links to each other through the DP bus between said row control center main control device and the said interface encoding board;
Said interface encoding board one end links to each other with said row control center main control device through said DP bus, and the other end links to each other with the other electronic unit of rail;
Said row control center main control device is used to generate train travel grant commands message, and through said message transmissions interface the train travel grant commands message that generates is sent to said interface encoding board;
Said interface encoding board; Be used to receive the train travel grant commands message that said row control center main control device sends through said message transmissions interface; And according to the algorithm that presets said train travel grant commands message is encoded, the train travel grant commands message behind the coding is sent to the other electronic unit (LEU) of said rail.
2. high-speed railway according to claim 1 generates the system of transponder message in real time, it is characterized in that, the transmission of garage's car grant commands message is ranked in 830 of said DP bus supports or 1023.
3. high-speed railway according to claim 1 generates the system of transponder message in real time; It is characterized in that; Said interface encoding board comprises that the identical first cover circuit and second of structure overlaps circuit totally two cover circuit; Said first cover circuit and the said second cover circuit are two and get two circuit, and said first cover circuit and the said second cover circuit constitute two jointly and take advantage of two to get two circuit, and the CPU of the said first cover circuit is connected through universal serial bus with the CPU of the said second cover circuit.
4. high-speed railway according to claim 3 generates the system of response message in real time, it is characterized in that, the CPU of the CPU of the said first cover circuit and the said second cover circuit is specially FPGA.
5. a high-speed railway generates the transponder method of message in real time, it is characterized in that, comprising:
Row control center main control device generates train travel grant commands message, and said train travel grant commands message is sent to the interface encoding board;
Said interface encoding board is encoded to said train travel grant commands message according to the encryption algorithm that presets, and the train travel grant commands message after will encoding is sent to LEU.
6. high-speed railway according to claim 5 generates the transponder method of message in real time, it is characterized in that, said row control center main control device generates train travel grant commands message and comprises:
Said row control center main control device generates train travel grant commands message according to track circuit section physical data, occupied information, route information, line information and temporary speed limitation information.
7. high-speed railway according to claim 5 generates the transponder method of message in real time, it is characterized in that, the size of the train travel grant commands message that said row control center main control device generates is 830 (bit) or 1023bit.
8. high-speed railway according to claim 7 generates the transponder method of message in real time, it is characterized in that, said interface encoding board is encoded to said train travel grant commands message according to the encryption algorithm that presets and comprised:
When the train travel grant commands message that main control device sends at said row control center is 830bit, be 1023bit with said train travel grant commands message coding, and the train travel grant commands message after will encoding is sent to LEU.
9. high-speed railway according to claim 7 generates the transponder method of message in real time, it is characterized in that, this method also comprises:
When the said interface encoding board train travel grant commands message that main control device sends at said row control center was 1023bit, the said train travel grant commands of transparent transmission message was given said LEU.
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Application publication date: 20120502 |