A Novel Cooperative Caching Scheme for Wireless Ad Hoc Networks: GroupCaching

In the mobile ad hoc network, a mobile host can communicate with others anywhere and anytime. Cooperative caching scheme can improve the accessibility of data objects. However, the cache hit ratio is reduced and access latency becomes longer significantly due to the mobility of MHs, energy consumption in battery, and limited wireless bandwidth. In this paper, the authors propose a novel cooperative caching scheme called GroupCaching (GC) which allows each MH and its 1-hop neighbors form a group. The caching status is exchanged and maintained periodically in a group. By using the proposed GroupCaching, the caching space in MHs can be efficiently utilized and thus the redundancy of cached data is decreased and the average access latency is reduced.