机间紫外光通信网络MAC层分段运行退避算法研究

A Subsection Operation Back-off Algorithm of MAC Layer in Airborne Ultraviolet Communication Network

对飞机编队内部和飞机编队之间的紫外光通信网络工作模式以及相应的MAC层协议进行研究。为保证编队内所有飞机的信息共享与交互,编队内部采用非直视通信NLOS(a)模式;为保证通信距离和质量,编队之间采用NLOS(c)模式进行通信。机间紫外通信组网MAC层协议以原IEEE802.11DCF协议为基础,对传统二进制指数退避算法进行改进,提出了一种基于分段思想的动态退避算法并进行了仿真研究,仿真结果表明:该算法与传统算法相比具有时延短,吞吐量大的特征,更适用于机间紫外通信网络。

The ultraviolet communication model and the MAC protocol were analyzed based on practical aircraft formation.The NLOS（a）communication model was used to insure the information interaction within the aircraft formation.The NLOS（C）communication model was used to insure communication distance and communication quality inter-aircraft formation.The MAC protocol in the airborne ultraviolet communication was based on traditional IEEE802.11 DCF protocol.An improved back-off algorithm SDBA was proposed to enhance the performance of the BEB.Based on network simulation platform of NS_2,the performance of the new algorithm was simulated and evaluated.The simulation results show that the new algorithm has the characteristics of low delay,high throughput and is more suitable for the airborne ultraviolet communication network.