Gossip-Based Cooperative Caching for Mobile Phone Games in IMANETs

Cooperative caching is an efficient way to improve the performance of data access in mobile wireless networks, by cache nodes cooperatively caching copies of data items in their limited storage. With more demands on sharing a video or other data, especially for mobile phone games in an Internet-based Mobile Ad Hoc Network, the relations among data items become much more important than before. However, most of the existing works do not consider inherent relations among these data items. In this paper, we present a novel solution, Gossip-based Cooperative Caching (GosCC), to address the cache placement problem, considering the sequential relation among data items. Each mobile node stores the IDs of data items cached locally and the ID of the data item in use into its progress report. Each mobile node also makes use of these progress reports to determine whether a data item should be cached locally. These progress reports are propagated within the network in a gossip-based way. To improve user experience, GosCC aims to provide users with an uninterrupted data access service. Simulation results show that GosCC achieves better performance than the best one of the existing solutions, Benefit-based Data Caching, in terms of average interruption intervals and average interruption times, while sacrificing message cost to a certain degree.