BibTeX:

@article{IJIRSTV1I11138,
     title={Performance Improvement In Disruption Tolerant Network With Co-operative Caching},
     author={Chithra K P, Manoj M and AmbikadeviAmma T},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={1},
     number={11},
     pages={350--354},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV1I11138.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

Disruption Tolerant Networks (DTNs) consist of mobile devices or nodes that contact each other opportunistically. Due to its high error rates and unpredictable node mobility, only intermittent network connectivity exists in DTNs, and the subsequent difficulty of maintaining end-to-end communication links makes it necessary to use "store-and-forward" methods for data transmission. This paper proposes a novel approach to support cooperative caching in DTNs, which enables the sharing and coordination of cached data among multiple nodes and reduces data access delay. The basic idea is to cache data at specific locations called network central locations (NCLs), which are being easily accessed by other nodes in the network. Due to the limited caching buffer of the central nodes, multiple nodes near a central node may be involved for caching, and ensure that popular data are always cached nearer to the central nodes via dynamic cache replacement based on query history. The NCL selection is based on a probabilistic selection metric. By placing the NCL on the content query path and clustering the nodes together, the data access performance can be improved.

Caching, Clustering, Data Access, Disruption Tolerant Network, Network Central Locations