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针对航空自组织网络的高动态特性和对高优先级业务的服务质量(Qo S)要求,提出了一种无反馈介质访问控制(MAC)协议建模方法及相应的阈值设置方法,以保证高优先级数据分组的时效性及可靠性。首先,对数据分组在接收端碰撞建立时间约束模型,得到信道统计结果与分组成功概率的映射关系;然后,根据不同业务的Qo S要求设置接入阈值;最后,实现对不同优先级业务的接入控制。仿真结果表明,在典型空域网络场景下,基于该建模方法的无反馈MAC协议可以为高优先级业务提供Qo S保证,即分组成功概率大于99%,端到端延时小于1 ms。
Aiming at the high dynamic characteristics of aviation ad hoc networks and the QoS requirements of high priority services, a non-feedback media access control (MAC) protocol modeling method and a corresponding threshold setting method are proposed to ensure high Timeliness and reliability of priority data packets. Firstly, a time constraint model is established for the collision of data packets at the receiving end to obtain the mapping relationship between the channel statistics and the packet success probability. Then, the access threshold is set according to the QoS requirements of different services. Finally, the connection between different priority services Into the control. The simulation results show that under the typical scenario of airspace network, the feedback-free MAC protocol based on this modeling method can provide Qo S guarantee for high-priority services, that is, the packet success probability is more than 99% and the end-to-end delay is less than 1 ms.