命名数据网络中考虑节点能量的转发策略研究

Forwarding strategy considering node energy in named data networking

命名数据网络(Named Data Networking,NDN),作为未来网络发展方向之一,取代了传统TCP/IP的基于IP地址路由转发方式,而采用基于名称路由的网络架构。近年来,许多学者研究将NDN应用于无线传感器网络中,来提高无线环境中数据获取效率。但目前的大多数研究都忽略了无线环境的资源受限情况,文中从无线环境中路由节点资源出发,提出了一种基于节点剩余能量和节点间距离的转发策略ECF(Energy Considered Forwarding),通过把节点能量融入节点转发等待时间的计算中,一方面可以用于均衡网络流量的分发,改善网络数据转发效率,同时考虑节点间距离的转发决策又可以保证数据获取。最后通过仿真实验,和近年的多种转发策略相比较,结果表明该方案在网络时延基本保持不变的情况下,可以明显提高网络的生命周期。

The named data networking(NDN),as a new future Internet architecture,inherits the hour・glass shape of the IP but replaces the IP end-to-end packet delivery model by a data retrieval model.In recent years,the potentialities and advantages of NDN in wireless sensor networks have been illustrated in several studies.However,most of the current researches ignore the resource limitation in the wireless environment.To perform better load balancing and provide high reliability of data acquisition,an energy considered forwarding(ECF)strategy considering the node energy and the distance between nodes is proposed.The performance evaluation is carried out by means of ndnSIM and the official NDN simulator.Simulation results show that compared with the several other forwarding strategies,the proposal can maintain longer life cycle of the network while the average delay of acquiring data message remains unchanged.