针对命名数据网络应用于无线多跳环境时,节点移动造成兴趣包转发找不到可达下一跳的问题,提出了基于相似节点转接的移动支持方案。该方案在移动节点周围的众多邻近节点中找到最佳目标节点,并把移动节点上的通信进程转接到最佳目标节点。为了找到这一最佳节点,设计了一种基于前向信息转发表的相似性算法来进行节点切换选择。仿真通过与目前的解决方案相对比,表明该方案能够有效减小设备在移动环境下的请求失败率和请求时延,并且随着移动节点的增多,网络对于抑制移动的影响具有更好的稳定性,验证了该方案能有效支持命名数据网络应用于无线多跳环境时的移动性。
Focusing on the problem that the interest message can51 find the available next hop due to the movement of nodes when named-date networking is employed in wireless multi-hops environment,this paper proposed a mobility supporting scheme based on similar node switching. The mobile node searched out an optimum target node among the ones near to itself, switching the communication processes to the target node. To find out the optimum target node,it proposed a similarity algorithm based on forwarding information base for switching node selection. Simulation results show that the scheme can effectively reduce the request delay and failed answer ratio in mobility environment compare to existing solutions. Moreover,it is more robust to the impactof node mobility when the number of mobile nodes increases. The verified scheme in named-date networking can effectively support the mobility in wireless multi-hops environment.