QoS reliability of hierarchical clustered wireless sensor networks

We consider the problem of reliability modeling and analysis of hierarchical clustered wireless sensor networks (WSN) in this paper. We propose reliability measures that integrate the conventional connectivity-based network reliability with the sensing coverage measure indicating the quality of service (QoS) of the WSN. And we propose a progressive approach for evaluating such coverage-oriented QoS reliability. Our approach is unique in that we analyze a more practical and generic hierarchical clustered WSN. We also incorporate the consideration of some dynamic dependencies, like the standby spare behavior, by proposing a modular scheme