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Track traffic real-time data synchronizing system based on network communication

A rail transit and real-time data technology, applied in transmission systems, electrical digital data processing, multi-channel program devices, etc., can solve the problems of hardware design limitations, parallel processing, poor time certainty, etc., and achieve simple and high-speed implementation The effect of real-time and reliability

Inactive Publication Date: 2019-01-01
苏州品幕春信息科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. There are restrictions on hardware design, two CPUs must be designed on the same motherboard, and the system architecture is highly coupled
[0005] 2. The program design must be customized according to the specific hardware, and the portability is poor
Once changed or upgraded, it must be redeveloped
[0006] 3. Parallel processing is not possible
[0007] In addition, traditional data transmission methods, such as CAN bus, high-speed serial port, etc., due to the small amount of transmitted data and poor time certainty, cannot adapt to the rail transit information industry with relatively high real-time performance requirements, large amount of information processing, and safety-critical system CPU. Data synchronization between

Method used

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  • Track traffic real-time data synchronizing system based on network communication
  • Track traffic real-time data synchronizing system based on network communication
  • Track traffic real-time data synchronizing system based on network communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0046] Implementation mode: The method was implemented in the following software and hardware environment.

[0047] 1. The CPU model is PowerPC8360, 667M main frequency, and the clock timing accuracy is 66MHz;

[0048] 2. Operating system version WindRiver VxWorks Cer t Rev.6.6, memory 256M;

[0049] 3. 10M / 100M adaptive network card, Ethernet communication rate is I00Mbit / S, and the transmission medium length is less than 50m;

[0050] 4. The transmission medium uses Category 5 twisted pair cables.

[0051] 5. The network connection method is in accordance with image 3 Shown.

[0052] Implementation process:

[0053] 1) The sender CPU packs data according to the UDP protocol, according to figure 1 Send data to the receiver CPU in a way;

[0054] 2) The receiver CPU receives the data and unpacks the data according to the UDP protocol format.

[0055] 3) According to the description in the summary of the invention, each time is counted separately.

[0056] (l) The encapsulation delay Tp of ...

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Abstract

The present invention discloses a track traffic real-time data synchronizing system based on network communication. The system comprises more than two CPUs in a track traffic system, each CPU being connected with one network card which is connected to each other. The track traffic real-time data synchronizing system is suitable for different types of CPUs, is suitable for systems with high timeliness requirements and is simple in implementation mode, based on a standard industrial Ethernet, the UDP protocol is simple and convenient with no need for complex network link, the linkage mode is point-to-point, and the timeliness and the reliability are high.

Description

Technical field [0001] The invention belongs to the field of software algorithms and is used for real-time synchronous communication of data. Background technique [0002] In industrial control systems and safety signal systems (applied in avionics, railway signaling, nuclear power and other industries), software systems are generally implemented by multiple CPUs, and real-time data synchronization is required between software systems. In order to ensure the high real-time and high reliability of data synchronization, effective communication methods must be used to synchronize real-time data between software systems to avoid system function failures and even security accidents due to untimely or lost data synchronization. This method can overcome some shortcomings of traditional synchronous communication. [0003] At present, in the rail transit signal system industry, data synchronization between CPUs mostly uses shared memory RAM. Using shared memory RAM to synchronize data bet...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L29/06G06F9/50
CPCG06F9/5066H04L67/1095H04L67/12H04L69/16
Inventor 李建
Owner 苏州品幕春信息科技有限公司
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