Priority-Based Service Differentiation Scheme for Medium and High Rate Sensor Networks

In Medium and High Rate Wireless Sensor Networks (MHWSNs), a sensor node may gather different kinds of network traffic. To support quality of service (QoS) requirements for different kinds of network traffic, an effective and fare queuing and scheduling scheme is necessary. The paper present a queuing model to distinguish different network traffic based priority, and proposed a rate adjustment model to adjust output rate at a node. Simulation results shows the proposed priority-based service differentiation queuing model can guarantee low average delay for high priority real time traffic. Using rate adjustment model can achieve low packet loss probability, therefore increase the network throughput.