Research On Data Storage And Access Technology For Wireless Sensor Networks

Wireless sensor networks are data-centric networks, and therefore data storage and data access have become the focus of research in networks. A new storage solution DB-DCS(Data Balance-Data Center Storage) on the basis of the DCS-GHT(Data-Centric Storage-Geographic Hash Table)proposed in this paper. Data storage node in the sensing area networks is selected by the hash function using network density, making the perception data distributed uniformly within the networks. The current node and destination node location in the process of message transmission determine whether to select clockwise or counterclockwise message transmission in the GPSR (Greedy Perimeter Stateless Routing) routing boundary mode. According to different customer demands, data reliability is classified and the number backup nodes are determined according to how important the data is to customers. Finally, simulation displays data storage of each node in the networks and the message volume at the node process in the perception data storage and access, demonstrating the superiority of the new storage model.