Abstract: To support Quality of Service (QoS) requirements for different kinds of network in medium and high rate wireless sensor networks, a priority-based service differentiation and rate control strategy was proposed. The strategy gives high priority to the traffic with strong real-time and reliability requirement for service differentiation, calculates the rate difference using the factor ε, and adjusts the sending rate of its upstream node by using hop-by-hop method. The simulation results show the proposed strategy can guarantee high-priority real-time traffic with high throughput and low latency, and maintain the stability of the network throughput.

Key words: priority, service differentiation, rate control, medium and high rate sensor network

摘要： 针对中高速无线传感器网络中不同种类的网络流量对服务质量的需求，提出一种基于优先级的服务区分和速率控制策略。该策略对实时性和可靠性要求强的流量赋予高优先级以进行服务区分；并利用ε因子计算节点的速率差，逐跳地调整其上游节点的发送速率。仿真结果表明，所提出的策略能够保证高优先级实时流量具有高吞吐量和低延迟，并保持网络吞吐量的稳定。

关键词: 优先级, 服务区分, 速率控制, 中高速传感器网络