QoS supporting and optimal energy allocation for a cluster based wireless sensor network

Wireless sensor networks (WSNs) have become a very active and important area of research due to their potential in civil and military applications. A lot of research works focus on energy efficient routing protocols due to the limited energy of battery-powered nodes. Currently, the increasing interest in multimedia applications has made the QoS (quality of service) supporting an unavoidable task. In this paper, we perform the analysis of QoS supporting and optimal energy allocation issues by presenting a cluster based WSN. A QoS supporting scheme is developed for dynamic traffic conditions by controlling data generating rates at individual clusters. In addition, an explicit solution on the energy distribution at different clusters in the WSN is investigated based on an optimal energy allocation criterion. The localized QoS controlling scheme is useful in WSNs due to flexibility and scalability, and the obtained network energy distribution formula is particularly convenient for node deployment design in WSNs and three specific situations are discussed as applications.