A Novel On-Demand Qos Protocol Based on Near Static Clustering for Wireless Sensor Network

In wireless sensor networks (WSNs) application we sometimes only require single moment local field information, but traditional periodical all-network information collecting mode consumes much network resources. In order to satisfy Quality of Service (QoS) demands of information collection in wireless sensor networks, prolong network lifetime and minimize control overheads while insuring connectivity, a novel on-demand QoS protocol based on near static clustering (OQNSC) is proposed. This protocol employs a new near static clustering and cluster heads (CHs) rotation mechanism to aggregate information of collection fields on demand and selects maximum residual energy routing which meets QoS conditions for transmitting information among cluster heads. Simulation results show that OQNSC protocol can reduce control overheads effectively, prolong network lifetime significantly and improve the successful probability of information transmission.