基于有限优先权的无线Mesh网络信道分配算法  

Limited priority-based wireless Mesh network channel assignment algorithm

作　　者：李陶深[1,2] 张挺 葛志辉[1,2] LI Tao-shen;ZHANG Ting;GE Zhi-hui(School of Computer and Electronical Information,Guangxi University,Nanning 530004,China;Guangxi Colleges and Universities Key Laboratory of Parallel and Distributed Computing,Nanning 530004,China)

机构地区：[1]广西大学计算机与电子信息学院,广西南宁530004 [2]广西高校并行与分布式计算技术重点实验室,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2019年第2期426-432,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(61363067;61762010)

摘　　要：在现有的无线Mesh网络中,高优先级业务过多地占用信道资源,影响了不同业务之间占用资源的公平性。针对此问题,基于802. 11e EDCA协议,提出一种有限优先权的无线Mesh网络信道分配算法。该算法将信道占用时间比作为调整每个优先级业务优先数的标准,根据网络当前状态和各个优先级业务占用信道资源的情况,通过动态调整低优先级业务的优先权,适当地限制高优先级业务过多地占用信道资源,确保低优先级业务在网络负载较大时也能够占用一定的信道资源。网络仿真实验结果表明,该算法能有效地提高系统吞吐量和资源综合利用率,保证了高、低优先级业务间占用信道资源的公平性。In the existing wireless Mesh network,the high-priority business occupies too much channel resources,which affects the fairness of resource occupation between different businesses. In order to ensure the fairness of channel resources occupied by various businesses in wireless Mesh network,a limited priority-based wireless Mesh network channel assignment algorithm based on IEEE 802. 11 e EDCA is proposed. The algorithm takes the channel occupancy time ratio as a criterion for adjusting the priority number of each priority business. According to the current state of the network and the situation that each priority business occupies channel resources,the priority of the low priority business is dynamically adjusted. By appropriately limiting the occupation of channel resources by high-priority business,the algorithm ensures that low-priority businesses can occupy certain channel resources when the network load is large,so that improves the fairness between different businesses. The network simulation experiment results show that the algorithm caneffectively improve the system throughput and resource utilization,and effectively ensure the fairness of channel resources occupied by high and low priority businesses.

关 键 词：无线Mesh网络(WMN) 排队论 信道分配 公平性 有限优先权 

分 类 号：TP400[自动化与计算机技术]