【作者】 李诚；

【导师】 魏旻；

【作者基本信息】 重庆邮电大学 ， 控制科学与工程， 2020， 硕士

【摘要】 随着工业互联网的迅速发展,IPv4协议已经无法满足工业现场海量设备接入对地址的需求。IPv6(Internet Protocol Version 6)作为下一代IP协议,为IP网络与工业网络的无缝连接提供了必要的技术支持和广阔的地址资源。目前,国内外对IPv6应用于工厂内网络的研究还处于起步阶段,工业无线网络如WIA-PA和Wireless HART等与IPv6之间的无缝接入及协议适配尚待解决,同时工厂内网络扁平化后的数据调度也是急需解决的问题。本文首先提出了一种工业无线网络接入IPv6网络方法。同时,为了满足工业数据的实时和可靠传输,提出了一种面向工业无线接入的工厂骨干网调度机制,以优化网络性能。本文的主要研究工作如下:1.分析了非IP工业无线网络接入IPv6网络应用场景及体系架构,针对网关处提供IPv6接口和不提供IPv6接口的两种场景,提出了通过外部协议转换模块和内部协议模块来实现工业无线网络的接入方案。2.针对工业无线网络接入IPv6网络后,工业现场的业务数据流传输实时性和可靠性难以保证的问题,本文对基于优先级队列管理方法的数据流调度机制进行改进,设计了数据包的入队仲裁和出队调度机制,优化了IPv6工业网络中的丢包率和平均传输时延,同时提出了一种基于工业SDN的数据跨网传输(CNTS)带宽分配机制,以提高网络的链路利用率。3.搭建工业无线网络WIA-PA和Wireless HART接入IPv6网络验证平台对本文所提接入方法进行验证。结果表明,实现了工业无线网络与IPv6网络实现无缝连接。通过Mininet仿真软件创建SDN虚拟网络对本文所提调度机制进行验证,对链路利用率、平均时延、丢包率等性能指标进行测试,并与轮转调度算法以及ECMP算法分别进行了对比。对比发现本文方案更加优化,使得链路利用率达90%,平均传输时延小于50ms,网路丢包率小于1%。更多还原

【Abstract】 With the rapid development of industrial Internet,the IPv4 protocol has been unable to meet the demand for addresses for the access of massive devices in industrial sites.IPv6(Internet Protocol Version 6),as the next generation IP Protocol,provides the necessary technical support and extensive address resources for the seamless connection between IP network and industrial network.At present,the research on IPv6 application in factory network at home and abroad is still in the initial stage,the seamless access and protocol adaptation between industrial wireless networks such as WIA-PA and Wireless HART and IPv6 are still to be solved,and the data scheduling after the factory network flattening is also an urgent problem to be solved.This paper first proposes a method for industrial wireless network access to IPv6 network.At the same time,In order to satisfy the real-time and reliable transmission of industrial data,a scheduling mechanism for industrial wireless access is proposed to optimize the network performance.The main research work of this paper is as follows:1.It’s analyzed that the application scenarios and architecture of IPv6 network access for industrial wireless network which is without IP address.Besides,it’s proposed that accessing methods for industrial wireless network through external protocol conversion module and internal protocol module,aiming at the two scenarios where IPv6 interface is provided and IPv6 interface is not provided in the gateway.2.For industrial wireless Internet access IPv6 network,it is difficult to guarantee the real-time and reliability of the business data flow in the industrial field.In this paper,the method based on the priority queue management mechanism of data stream scheduling is improved.The arbitration of squad packet and the scheduling mechanism is designed so as to optimize the industrial network in IPv6 packet loss rate and average transmission delay.At the same time,a bandwidth allocation mechanism of data cross-network transmission(CNTS)based on industrial SDN was proposed to improve the link utilization of the network.3.It is established that the WIA-PA and Wireless HART access IPv6 network verification platform to verify the access method proposed in this paper.The results show that the wireless sensor network and IPv6 network are connected seamlessly.In addition,the virtual SDN network is created by the simulation software Mininet to verify the scheduling mechanism proposed in this paper.Some performance indexes such as link utilization,average delay and packet loss rate were tested and compared with the rotation scheduling algorithm and ECMP algorithm.By comparison,it is found that this scheme is more optimized,so that the link utilization rate reaches 90%,the average transmission delay is less than 50 ms,and the network packet loss rate is less than 1%.更多还原