SONIC: Stability of Nodes in Cooperative Caching for Wireless Network

Most of the researches in wireless networks focus on data transfer through central node, and not much works have been done on data access, cache replacement, and stability of nodes. A general technique used to improve the performance of data access is cooperative caching. Cooperative caching has become one of the most exciting techniques for wireless environment. Cooperative caching allows sharing and coordinated cached data items which are stored in node’s local cache to achieve better performance. The main strength of this technique is lower node communication overhead and energy consumption as well as reduction in the query latency. Cooperative caching caches the frequently accessed data, the nodes do not always have to send request to server. But, high node mobility, constrained battery power, and limited wireless bandwidth may decrease the cache hit ratio and increase access latency or nodes in a region may fail to cache more hot data when a cooperative caching scheme cannot effectively distribute varied data to cache in that region. Nodes in wireless network may have similar task and share general interest, cooperative caching which allows the sharing and coordination of cached data among multiple nodes can be used to reduce the bandwidth and power consumption. In this paper, we propose the SONIC scheme; we find the stability of nodes, and the nodes which are more stable are being used first for searching the data, thereby increasing the network lifetime.