Broadcasting based neighborhood cooperative caching for content centric ad hoc networks

Abstract

Content centric networking is a promising technology for data dissemination, which can be used in wireless ad hoc networks to cope with short-lived connectivity and dynamic topologies in wireless environments. Meanwhile, the broadcast nature of radio channel can be leveraged to improve the cooperative cache gain of content centric ad hoc networks. In this paper, a broadcasting based neighborhood cooperative caching (BNC) strategy is proposed. In BNC, a node selects caching node among its adjacent nodes and informs its caching node to cache the content while forwarding the data packet. By making best of the broadcast nature of radio channel, BNC achieves neighborhood cooperative caching without occupying extra wireless channel resource. In addition, the method of topology potential is exploited to make caching decision among adjacent nodes. Simulation results show that BNC can lead to better utilization of network cache space without deteriorating the network performances.