Research on quality of service in wireless sensor networks

As a complex network consisting of sensing, processing and communication, wireless sensor network is driven by various applications and highly requires new Quality of Service guarantees. The application target of WSN is to monitor events, and it pays more attention to the QoS of colony data packets. So, we present an improved QoS mechanism based on weighted mapping table. Because of the limited computational capabilities of WSN, the proposed mechanism import mapping table. The improved QoS mechanism finds the weight from mapping table according to the level of events, and dynamically adjusts the transmit probability of each event. The mechanism considers the different event delay requirements, and adjusts the bandwidth and event delay reasonably for each event. The simulation proves that the improved mechanism algorithm is simple and effective; it can meet the application requirement of wireless sensor network.