基于OpenFlow的无线传感器网络路由层可重构技术的研究

Research on Wireless Sensor Network Routing Protocol Reconstruction Technology Based on OpenFlow

通过引入OpenFlow协议技术,提出了路由协议可动态重构的无线传感器网络架构,增强网络抽象与重构能力,为网络转发策略及路由协议的研究提供了新的方法.通过网络转发面与控制面相分离的体系结构,有效降低了用户流量与网络控制流量的耦合性,使用户可以动态选择或配置路由协议而无需重新部署网络.选取洪泛协议、低功耗自适应集簇分层协议及定向扩散协议进行试验,在改进的定向扩散协议中,协议平均流表匹配长度下降至2.85;在协议动态切换试验中,各协议可通过重新配置路由动作序列及流表的方式实现动态切换.

To improve upon existing abstraction and reconstruction technologies,in this study,we created a reconfigurable wireless sensor network architecture based on Open Flow. Our separation of the control and data planes makes the routing configuration and data transmission independent,so that the coupling between the control and switch can be decreased. A user can then choose and configure the routing protocol while running the network without redeployment. We experimented with the Flooding,Low Energy Adaptive Clustering Hierarchy,and Directed Diffusion protocols to verify the effectiveness of the testbed. In addition,in the improvement of the Directed Diffusion protocol,we found that the average matching number can be reduced to 2.85,which results in the switch panel having better performance. Lastly,we analyzed the network traffic when the running protocol is switched and the results indicate that dynamic routing reconfiguration improves its flexibility and adaptability.