Afterwards the principle and characteristics of can technology are expatiated and cals are briefly introduced , followed by a research on the reliability and real - time performance of can , which indicates that can has a very low error ratio and that it is possible to design a can system meeting the requirements of industry control 然后文章分析了can总线的技术原理，介绍了can高层协议，深入研究了can在可靠性和实时性等方面的性能，结果表明， can具有极低的出错概率，设计一个实时性满足工业控制的can总线系统是可行的。
The protocol opnet models built here could be reused for the simulation of throughput performance of aos bitstream , virtual channel access and other services , for the simulation of delay , channel utilization , and other aos protocol performance metrics , or for the simulation of the performances of high layer protocols ( space network layer , transport layer ) based on the aos space data link protocol 可以在本课题建立的协议opnet模型基础上进行aos协议位流、虚拟信道接入等其它业务吞吐量性能仿真,或进行延迟、信道利用率等协议其它性能仿真,或将模型应用于基于aos数据链路层的高层协议(空间网络层、传输层)性能仿真。
First the feasibility of using ethernet in industrial environment is analyzed , using switched ethernet as substation insulation information transmission network and using tcp / ip protocol suite as the protocols of higher layers is suggested . the factors affecting the real - time performance of data transmission network is presented and the method to improve the performance of ip protocol stack and reduce the traffic of network is focused 首先分析了以太网应用于工业环境的可行性，提出使用交换式以太网作为变电站绝缘信息传输网络，使用tcp ip协议作为高层协议；给出了影响数据传输实时性的各种因素，重点讨论了ip协议栈性能优化和减少网络负荷的方法。
According to the characteristic of high speed network , it also have realized the distribution of data handling with a linux cluster - lvs ; in final , the paper analysis the 3 layer of network data restore : ip layer , tcp layer and application layer . especially it made detailed analysis for application protocol restore . it also realized the data restore of simple high layer protocol 针对高速网信息流量大的特点，系统在一个linux集群- lvs上实现了数据包处理的分布性；最后，本文对网络数据还原的三个层面： ip层、 tcp层和应用层作了还原分析，特别对应用层的协议还原作了详细分析，并实现了其中简单高层协议的数据还原。
