A Pragmatic Technique for Cooperative Caching for Efficient Data Access In Interference Lenient Networks

B Shiva, Kumar Tech, M Lakshmi, B Shiva Kumar
2016 Technology, Management and Research A Peer Reviewed Open Access International Journal   unpublished
Disruption Tolerant Networks (DTNs) are characterized by unpredictable node mobility, low node density and lack of global network information. Most of research efforts in DTNs focus on data forwarding; only limited work has been made on providing efficient data access to mobile users. Here we propose a novel approach to support cooperative caching in DTNs, which provides the sharing and coordination of cached data among multiple nodes and reduces data access delay. Our basic design is to
more » ... onally cache data at a set of Network Central Locations (NCLs), which can be easily accessed by other nodes in network. An efficient scheme which ensures appropriate NCL selection based on a probabilistic selection metric and coordinates multiple caching nodes to optimize the tradeoff between caching overhead and data accessibility. Extensive trace-driven simulations show that our approach significantly improves data access performance compared to existing schemes.