Schedule And Protocol Policy Of Industry Control Network Based On Image

Images have huge information and are more direct, accurate and vivid than any other forms. Image information is becoming the important item and method for morden industrial control. When the image information is introduced into the traditional industrial control network, it has new characteristics: large quantity of data net transmission, various data types, and high demand for network service of quality(QoS). The effect of the large introduced image information to the property of control system can be compensated and improved by proper resources schdule tactics and optimizing network transmission protocolsThe resource schedule and network delivery protocol are taken to be considered to design the the report classification apparatus, put forward the dynamic cache schedule calculation based on the time slice to real practice, and design the fault-tolerant UDP protocol.Multiple-dimensional prefix packet classification algorithm is designed. Adopt multi-dimensional filtration. Each is appointed different weights. The total value of a packet results in the collection of all its weights and is shown as Wi. Deliver a certain range of Wi to one queue and hence transfer the task flow based on link to service flow based on the priority that meets with each QoS requirement. The resources schedule that has the distinguishing service is just based on it.The dynamic schedule algorithm based on the round robin is designed. In one service cycle, each queue occupies the resources for a time slice (shown as t) and high priority class is serviced first. A priority compensation model is designed to supply positive deviation compensation. Therefore it reduces queueing delay jitter caused by the sudden data on the premise of fair. Based on this algorithm, a new method is put forward to identify the non-adaption flow and limit it not to excessive contention resources.A method to calculate the length of the self-adaption line is designed to meet with the requirement of the system dynamic delay. Traditional network calculation theory has been further developed and applied. multi-input curve and Round Robin service curve have been introduced as well as the biggest line length that meets with the dynamic line-up relay. New protocol TERUDP(Tolerate Error Reliable UDP) has been designed. A new package lost identification method has been put forward as well as the new concept of effective time delay and non-effective time delay. Without any changes to the high effectiveness of traditional UDP, it improves the reliability, decreases the net package lost and time delay and increases the application rates of the network effective data transmission. The result is that UDP has the perception of network jam and preventing from over contention of bandwidth.The application of new schedule calculation and optimized protocols has met with the requirement of the RT and accurate of the net data, reduced the time delay and package lost to the least, met with the RT of the control information as well as assured lower package lost of HIFI pictures. It presents a reliable model of schedule method and application of protocols for multi-media information transmission in industrial control network. It will improve the application of industrial control network system based on images in the fields of remote control, online determination, and etc.