Optimizing Concurrent-Query Execution in Wireless Sensor Networks
Dilini A. Muthumala, Udara S. Liyanage, Asanka Sayakkara, Jeevani S. Goonetillake · 2018
Due to the underlying complexity of wireless sensor networks in acquiring data, database abstractions are used in many real-world WSN applications utilizing SQL-like queries. As it is the trend nowadays to share a WSN among multiple users, concurrent query execution has become an important concern in the domain. Since WSN nodes are extremely energy constrained entities, and query processing and query results communication consumes a significant amount of energy, it is necessary to perform optimizations to the concurrent query execution in WSNs. While many previous researches have attempted to address this problem, they have mostly assumed WSNs which consists of a single base station shared among multiple users. However, the existing concurrent query optimization solutions are not effective for a WSN with multiple base stations. In this paper, we present a novel query optimization strategy for the database abstraction of WSNs which consists with multiple users. The evaluation results show that the suggested scheme significantly decreases the energy usage not only in single base station scenarios but also in multiple-base station scenarios.