We describe a novel Distributed Storage protocol in Disruption (Delay) Tolerant Networks (DTN). Since DTNs can not guarantee the connectivity of the network all the time, distributed data storage and look up has to be performed in a store-and-forward way. In this work, we define local distributed location regions which are called cells to facilitate the data storage and look up process. Nodes in a cell have high probability of moving within their cells. Our protocol resorts to storing data items in cells which have hierarchical structure to reduce routing information storage at nodes. Multiple copies of a data item may be stored at nodes to counter the adverse impact of the nature of DTNs. The cells are relatively stable regions and as a result, data exchange overheads among nodes are reduced. Through experimentation, we show that the proposed distributed storage protocol achieves higher successful data storage ratios with lower delays and limited data item exchange requirements than other protocols in the literature.

Additional Metadata
Keywords Disruption (delay) tolerant network, Distributed data storage, Local algorithm
Persistent URL dx.doi.org/10.1109/WOWMOM.2010.5534948, dx.doi.org/10.1109/WOWMOM.2010.5534948
Conference 2010 IEEE International Symposium on "A World of Wireless, Mobile and Multimedia Networks", WoWMoM 2010
Citation
Du, J. (Jingzhe), Kranakis, E, & Nayak, A. (Amiya). (2010). Distributed storage in disruption tolerant network. Presented at the 2010 IEEE International Symposium on "A World of Wireless, Mobile and Multimedia Networks", WoWMoM 2010. doi:10.1109/WOWMOM.2010.5534948