一种航空Ad hoc网络优先级权重速率控制算法
Priority weighted rate control algorithm in aeronautical Ad hoc networks

针对现有航空Ad hoc网络的媒体接入控制（media access control，MAC）协议存在信道资源分配缺乏公平性的问题，该文提出一种优先级权重速率控制（priority weighted rate control，PWRC）算法。该算法在MAC层上采用加权队列模型，利用业务的优先级及权重值共同控制业务的降速因子，达到在保证高优先级业务服务质量（quality of ser-vice，QoS）的同时提升信道资源利用的公平性。仿真结果表明：与现有MAC协议相比，使用该方法时相同优先级业务的公平性指数接近理论上限1，对信道资源的利用率最高可提升40%；同时，可降低相同优先级业务平均端到端延时及延时抖动。
Abstract：Current media access control (MAC) protocols for aeronautical Ad hoc networks can not achieve fair channel resource utilization. This paper describes a priority weighted rate control (PWRC) algorithm, which uses the fair queuing model in the MAC layer. The traffic speed reduction factor is determined by its priority and weight. The PWRC guarantees the quality of service (QoS) while the channel resource is fairly utilized. Simulations indicate that the traffic fairness index with the same priority is closer to the upper band 1 than with existing MAC protocols. The channel resource utilization is improved about 40% and the end-to-end delay and jitter are reduced.