一种基于SDN的混合网络架构设计与实现

Design and Implementation of Hybrid Network Architecture based on SDN

现阶段,单一的移动自组织网络(MANET)或延迟容忍网络(DTN)已经无法满足战场、灾区等复杂环境通信的需求,将两者结合的思想被研究者们提出。为了解决常规路由转发协议栈和延迟容忍转发协议栈不兼容的问题,我们利用目前广受关注的软件定义网络技术(SDN),提出了一种将移动无线自组网(MANET)和延迟容忍网络(DTN)相结合的混合网络架构,通过向流表发送探测分组,判断到目的地是否有“端到端”链路的方式,对节点的传输方法进行动态切换。最后对混合架构进行了实现,并与传统网络架构做实验对比,说明了我们方案的优越性。

At present, a single MANET (mobile ad hoc network) or a DTN (delay tolerant network) is not able to meet the communication needs of complex environments such as battlefields and disaster areas. The idea to combine the two is proposed by researchers. In order to solve the problem of incompatibility of between the conventional routing and forwarding protocol stack and the delay-tolerant forwarding protocol stack, a hybrid network architecture in combination of mobile wireless MANET and DTN is proposed by using SDN (software-defined network) technology, which is widely concerned at present. The transmission method of the node is dynamically switched by sending a probe packet to the flow table and determining whether the destination has an “end-to-end” link. Finally, the hybrid architecture is implemented and compared with the traditional network architecture, which indicates the superiority of the proposed scheme.