CN103067124A - Emulation proof method of train signal channel multi-code-rate hybrid encoding and decoding hardware - Google Patents
Emulation proof method of train signal channel multi-code-rate hybrid encoding and decoding hardware Download PDFInfo
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- CN103067124A CN103067124A CN2012105443204A CN201210544320A CN103067124A CN 103067124 A CN103067124 A CN 103067124A CN 2012105443204 A CN2012105443204 A CN 2012105443204A CN 201210544320 A CN201210544320 A CN 201210544320A CN 103067124 A CN103067124 A CN 103067124A
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Abstract
The invention relates to an emulation proof method of train signal channel multi-code-rate hybrid encoding and decoding hardware. Commands, data and data information which are packaged are sent to a ground control center by a vehicle-mounted transceiver through a wired/wireless network, commands of the vehicle-mounted transceiver are processed by the ground control center and tuned in a dispatching management machine to enter a wait sequence, the commands are immediately sent to a hardware emulation machine to start emulation when the commands reach, the hardware emulation machine sends emulation state information back, when the emulation ends, the ground control center sends emulation results to the vehicle-mounted transceiver to display the emulation results, the ground control center can also send the commands, the data and the data information of data which are packaged to the vehicle-mounted transceiver through the wired/wireless network, and the received packages are sent back to the ground control center by the vehicle-mounted transceiver after being compared by the vehicle-mounted transceiver. A mutual separation way of a data transmission process and an emulation process improves the emulation effect of an emulation platform, and the emulation platform similar to the actual situation is achieved.
Description
Technical field
The present invention relates to a kind of train communication technology, particularly a kind of train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method.
Background technology
Since 1810, British Stefansson was invented since the first in the world train, and safety and high speed are two general objectives that the city railway traffic system is pursued always.And based on the train control system of communicating by letter, utilize it not rely on the high-precision train Positioning Technology of track circuit, can realize two-way continuous, jumbo car-ground data communication, credible and efficient car-ground communication system is the key that guarantees train command scheduling, security of operation.Therefore, car-ground wireless communication system must be realized reliable efficiently real-time Data Transmission in interference and fading channel environment.In order to satisfy the harsh requirement of Train Control command system, reduce the error rate of transfer of data, car-ground communication system must adopt special method of controlling security to improve the reliability of transfer of data; In many measures, channel coding technology is to improve the important of car-ground data transmission credibility and one of effective measures.For the chnnel coding in the train-ground communication, checking is a kind of important research method based on simulation hardware.
Summary of the invention
The present invention be directed to the problem of the importance of the error rate of transfer of data in the Train Control, a kind of train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method has been proposed, the method can reach the emulation platform close with virtual condition, improve the accuracy of checking, for simulation train control system communication provides good assurance.
Technical scheme of the present invention is: a kind of train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method, adopt the structure of vehicle-mounted transceiver and ground control centre transceiver, adopt the two-way emulation verification method of design of facing assembly, by vehicle-mounted transceiver will organize the bag after order, data and data message are sent to the ground control centre by wire/radio network, the ground control centre can be processed the order of vehicle-mounted transceiver, call in scheduler handler, enter the wait sequence, after order reaches beginning constraints, be sent to immediately hardware emulator, and beginning emulation, at regular intervals simultaneously, hardware emulator sends it back simulation status information, Straight simulation finishes, the ground control centre sends to vehicle-mounted transceiver with simulation result and shows simulation result, equally can be by the order of ground control centre after with data group bag, data and data message are sent to vehicle-mounted transceiver by wire/radio network, send back to the ground control centre after the group bag that vehicle-mounted transceiver will receive is compared.
The group bag that described vehicle-mounted transceiver receives the ground control centre is processed through the family client information of after unpacking order, data and data message being seed a visitor out, after client-side information is processed the data of calling and receiving and compared by client-side information in allocating task number and the vehicle-mounted transceiver, carry out the client-side information packing; Data configuration file is processed packing to source data; The command configuration file is packed command file; Order, data and three kinds of packaging files of client-side information package and send out.Described vehicle-mounted transceiver receiving terminal is reduced into client-side information and data and order three major types data after the group bag decomposes, after the client-side information processing module is processed, compare with source data one by one, finally forms the comparison report.It is described when data configuration file carries out data processing and data packing, adopted minimum and the iterative algorithm revised to carry out data compression, then this algorithm and scheduling strategy are combined, at first this algorithm is only stored two values in the renewal of each check-node: the absolute value of minimum value, sub-minimum and minimum value position; And then store each sign bit, size equals the sum of " 1 " in the check matrix.
Described ground control centre receives vehicle-mounted transceiver group bag and unpacks, and is reduced into client-side information and data and order three major types data, customer information is kept in the client formation, when all data simulated good after, simulation result is packed together; Data and order are packed in the scheduler handler, and wait task distributes; When task is assigned to when carrying out emulation on the corresponding hardware, data can be repeatedly mutual between formation and emulator, and with continuous collection emulated data, final emulation is complete, the result is put into the end formation, wait pending data, order and client-side information packing to send it back the vehicle-mounted end transceiver.
Exchange data using multi-clock between described vehicle-mounted transceiver and the ground control centre, multi code Rate of Chinese character, many compile modes changing method, before coded data enters coding/decoding module, be introduced into a barrel-shaped buffer module, the height of this barrel-shaped buffer module can be decided by code check and compile mode, the frequency of overflowing of bucket is determined jointly by clock, code check and coding and decoding mode, data rate determines by clock frequency, and like this when bucket is full, data are packed together is sent to encoder.
Beneficial effect of the present invention is: train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method, the mode that application data transmission course and simulation process are isolated mutually, can improve the simulated effect of emulation platform, reach the emulation platform that is close with virtual condition; Multi-clock is provided in the simulating scheme, multi code Rate of Chinese character, the method for many compile modes hybrid combining, at code check, coding and decoding, clock switching aspect has proposed corresponding method; The result of automation statistical comparison is provided, improves the checking accuracy; Adopt modularization idea, reduce the coupling between modules, improve the cohesion in the module, improve reusability and the expansion of simulating, verifying scheme; Adopt the loss of the balanced reduction of software and hardware hardware, improve simultaneously parallel performance.
Description of drawings
Fig. 1 is vehicle-mounted end transceiver architecture figure of the present invention;
Fig. 2 is ground control centre of the present invention Organization Chart;
Fig. 3 is multi-clock of the present invention, multi code Rate of Chinese character, many compile modes changing method schematic diagram.
Embodiment
Adopt the structure of vehicle-mounted transceiver and ground control centre transceiver, adopt the two-way simulation and verification platform of design of facing assembly.By vehicle-mounted transceiver will organize the bag after order, data and information exchange are crossed wire/radio network and are sent to the ground control centre, the ground control centre can be processed the order of vehicle-mounted transceiver, call in scheduler handler, enter the wait sequence, after order reaches beginning constraints, be sent to immediately hardware emulator, and beginning emulation, at regular intervals simultaneously, hardware emulator sends it back simulation status information, and Straight simulation finishes, ground control centre or vehicle-mounted transceiver receive simulation result, and by processing, send to ground control centre or vehicle-mounted transceiver, show simulation result.
As shown in Figure 1, be the vehicle-mounted end transceiver architecture.Sending on the data direction, in vehicle-mounted control sending and receiving end part, information type is divided into three types, command configuration file, data configuration file and source data.The effect of command configuration file is the whole simulation process of overall situation control, and the effect of data configuration file is how configuration data is processed, and source data is exactly data to be processed.Simultaneously, some train essential informations, and task sign will be added on the transport stream equally.These information spinners will be divided into allocating task number and client-side information.The effect of allocating task number is to distribute independently identification to each task, is conducive to the tracking of data, and analyzes.Client-side information is for indicating train information.Both combine and just can distinguish Data Source and with source place different task situation.
On the receive data direction, data are received, are reduced into client-side information and data and order three major types data.After the client-side information processing module is processed, compare with source data one by one, final formation compared report.
When data configuration file carries out data processing and data packing, for reducing the demand to vehicle key message memory requirement and real-time, adopted minimum and the iterative algorithm revised to carry out data compression, then this algorithm and scheduling strategy have been combined, to reduce memory space and implementation complexity.At first this algorithm is only stored two values in the renewal of each check-node: the absolute value of minimum value, sub-minimum and minimum value position; And then store each sign bit (size equals the sum of " 1 " in the check matrix).
As shown in Figure 2, be the ground control centre framework.Data are received, unpack, and are reduced into client-side information and data and order three major types data.Customer information is kept in the client formation, when all data simulated good after, be that simulation result packs together.Data and order are packed in the scheduler handler, and wait task distributes.When task is assigned to when carrying out emulation on the corresponding hardware, data can be repeatedly mutual between formation and emulator, with continuous collection emulated data, final emulation is complete, the result is put into the end formation, wait pending data, order and client-side information packing send it back the vehicle-mounted end transceiver.
As shown in Figure 3, multi-clock, multi code Rate of Chinese character, many compile modes changing method schematic diagram is for the exchange of mass data between vehicle-mounted transceiver and the ground control centre, for guaranteeing the effective, quick of exchange, adopt multi-clock herein, multi code Rate of Chinese character, many compile modes changing method.Before coded data enters coding/decoding module, be introduced into a barrel-shaped buffer module, this module can effectively solve multi-clock, multi code Rate of Chinese character, when many compile modes switch, coding and decoding result's confusion.
The height of this barrel-shaped buffer module can be decided by code check and compile mode, because the block size of different code checks and compile mode is not identical.The bucket overflow frequency by clock, code check and coding and decoding mode determine that jointly data rate is determined by clock frequency.When bucket was full, data are packed together was sent to encoder, can effectively solve the situation that becomes clock, and the simultaneously high dynamic change of bucket is solving multi code Rate of Chinese character, in the time of difficulty that many compile modes switch, did not lower efficiency.
Claims (6)
1. train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method, it is characterized in that, adopt the structure of vehicle-mounted transceiver and ground control centre transceiver, adopt the two-way emulation verification method of design of facing assembly, by vehicle-mounted transceiver will organize the bag after order, data and data message are sent to the ground control centre by wire/radio network, the ground control centre can be processed the order of vehicle-mounted transceiver, call in scheduler handler, enter the wait sequence, after order reaches beginning constraints, be sent to immediately hardware emulator, and beginning emulation, at regular intervals simultaneously, hardware emulator sends it back simulation status information, and Straight simulation finishes, and the ground control centre sends to vehicle-mounted transceiver with simulation result and shows simulation result, equally can be by the order of ground control centre after with data group bag, data and data message are sent to vehicle-mounted transceiver by wire/radio network, send back to the ground control centre after the group bag that vehicle-mounted transceiver will receive is compared.
2. described train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method according to claim 1, it is characterized in that, the group bag that described vehicle-mounted transceiver receives the ground control centre is processed through the family client information of after unpacking order, data and data message being seed a visitor out, after client-side information is processed the data of calling and receiving and compared by client-side information in allocating task number and the vehicle-mounted transceiver, carry out the client-side information packing; Data configuration file is processed packing to source data; The command configuration file is packed command file; Order, data and three kinds of packaging files of client-side information package and send out.
3. described train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method according to claim 2, it is characterized in that, described vehicle-mounted transceiver receiving terminal is after the group bag decomposes, be reduced into client-side information and data and order three major types data, one by one after the client-side information processing module is processed, compare with source data, final formation compared report.
4. described train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method according to claim 2, it is characterized in that, it is described when data configuration file carries out data processing and data packing, adopted minimum and the iterative algorithm revised to carry out data compression, then this algorithm and scheduling strategy are combined, at first this algorithm is only stored two values in the renewal of each check-node: the absolute value of minimum value, sub-minimum and minimum value position; And then store each sign bit, size equals the sum of " 1 " in the check matrix.
5. described train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method according to claim 1, it is characterized in that, described ground control centre receives vehicle-mounted transceiver group bag and unpacks, and be reduced into client-side information and data and order the three major types data, customer information is kept in the client formation, when all data simulated good after, simulation result is packed together; Data and order are packed in the scheduler handler, and wait task distributes; When task is assigned to when carrying out emulation on the corresponding hardware, data can be repeatedly mutual between formation and emulator, and with continuous collection emulated data, final emulation is complete, the result is put into the end formation, wait pending data, order and client-side information packing to send it back the vehicle-mounted end transceiver.
6. described train signal channel multi code Rate of Chinese character mixed compiling code simulation hardware verification method according to claim 1, it is characterized in that, exchange data using multi-clock between described vehicle-mounted transceiver and the ground control centre, multi code Rate of Chinese character, many compile modes changing method, before coded data enters coding/decoding module, be introduced into a barrel-shaped buffer module, the height of this barrel-shaped buffer module can be decided by code check and compile mode, the bucket overflow frequency by clock, code check and coding and decoding mode determine jointly, data rate determines by clock frequency, and like this when bucket is full, data are packed together is sent to encoder.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111726184A (en) * | 2020-05-07 | 2020-09-29 | 上海大学 | Wireless communication performance test channel simulation system for magnetic suspension traffic crossing steel sleeper |
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| CN201590826U (en) * | 2010-01-12 | 2010-09-22 | 上海大陆信息服务有限公司 | Automatic collecting and correcting device for metro fault data |
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| CN111726184A (en) * | 2020-05-07 | 2020-09-29 | 上海大学 | Wireless communication performance test channel simulation system for magnetic suspension traffic crossing steel sleeper |
| CN111726184B (en) * | 2020-05-07 | 2021-10-12 | 上海大学 | Wireless communication performance test channel simulation system for magnetic suspension traffic crossing steel sleeper |
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