QCTC: QoS-Based Clustering Topology Control Algorithm for Wireless Sensor Networks

Topology Control and energy saving is one of the most important challenges in wireless sensor networks because of Special characteristics of these networks such as limited transmission range, low bandwidth, limited power resource and the impossibility of recharging. In this paper, k-fault tolerant clustering topology control algorithm is presented. This algorithm named QoS-based clustering topology control algorithm (QCTC), improves network lifetime and reduces average consumed energy in two ways, first by reduction in transmission power of nodes to minimum possible power and second by choosing only one path among different existing paths to be active between each sensor and base station in time intervals. The active paths are selected periodically based on QoS provisions and energy cost. Our algorithm then saves battery power of nodes by scheduling sleep intervals for nodes in inactive paths. Through network simulation we show that our algorithm reduces average consumed energy and improves network lifetime.