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Sensor data streams exhibit unique characteristics such as inherent information uncertainty, intrinsic data sample correlations (both within and across streams) and resource constraints. In this paper, we introduce a new data model, called probabilistic stream relational algebra (PSRA), that extends conventional relational model to capture these new characteristics faced in managing data in sensor...
A black hole attack is a severe attack that can be easily employed against routing in sensor networks. In a black hole attack, a malicious node spuriously announces a short route to the sink node (the destination) to attract additional traffic to the malicious node and then drops them. In this paper, we propose a hierarchical secure routing protocol for detecting and defending against black hole attacks...
This paper presents an approach to optimizing object relational rules constructed for sensor networks. An OR (object-relational) rule network is introduced to process large number of rules. Optimization of an OR rule network is based on the cost of condition matching. Given a set of OR rules, different access paths are generated, and the cost of these access paths are evaluated in order to determine...
Localization of events is a canonical problem for sensor networks, especially for applications such as intrusion detection or neighborhood monitoring. We employ a general sensor model which models various types of sensor nodes. However, traditional triangulation method will be unsolvable when the sensor nodes are positioned on a line. To overcome such ill-conditioned cases, we can use MAP or MMSE...
The following topics are dealt with: wireless communications; embedded systems design; reconfiguration and optimization; trust management; design issues in mobile hand-held devices; power and energy awareness; context-aware and location-aware computing; access control; tools and application systems; sensor networks; RFID implementation; security and assurance; motion and tracking; reliability; risk...
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