内容中心网络基于拓扑势的请求者移动性支持机制

Consumer mobility scheme in content centric networks based on topological potential

针对内容中心网络中请求者的移动性问题,依据内容传输路径上节点度的差异性,选择适合的缓存位置,依据内容个体的流行度,判断是否缓存以及副本的通告范围,提出一种自适应移动性支持机制。通过构建内容副本的拓扑势能,从请求者选择最优数据源的角度出发,利用节点获取到的拓扑信息,结合缓存策略及拓扑势通告,实现对请求者移动性的支持。仿真结果表明,该机制能够为请求者移动提供有效的支持,相比其它方案,提高了缓存命中率,降低了内容请求时延。

Considering the consumer mobility issue in content eentric networks （CCN）, a topological potential based mobility scheme for consumers in CCN was proposed, which chose the appropriate cache location according to the degree difference of nodes on the content transmission path and determined whether to cache or how far the scope of the copy to notice according to content popularity. The scheme was designed for choosing the best data provider, and also the node information was taken full advantages of combined with caching strategy and topological potential notice to support the consumer mobility. The simulation results show that the scheme can improve the caching hit ratio and shorten the content request delay in the mobile communication, which provides efficient supports to the consumer mobility.