Date Added: Dec 2009
Tiered Sensor Networks. Sensor networks are expected to be deployed on some harsh or hostile regions for data collection or environment monitoring. Since there is the possibility of no stable connection between the authority and the network, in-network storage is necessary for caching or storing the data sensed by sensor nodes. A straightforward method is to attach external storage to each node, but this is economically infeasible. Therefore, various data storage models for sensor networks have been studied in the literature. In a notion of tiered sensor networks was discussed by introducing an intermediate tier between the authority and the sensor nodes.