一种用于无线传感网络的支持QoS的PD-DWDBA算法及其优化  

A QoS-supported PD-DWDBA Algorithm for Wireless Sensor Networks and its Optimization

作　　者：屈爱艳 李建国 赵琦 杜强 石志超 辛帅 QU Aiyan;LI Jianguo;ZHAO Qi;DU Qiang;SHI Zhichao;XIN Shuai(Shijiazhuang Kelin Electric Co.,Ltd.,Shijiazhuang 050222,China;College of Electrical Engineering,Hebei Polytechnic University,Shijiazhuang 050222,China)

机构地区：[1]石家庄科林电气股份有限公司,河北石家庄050222 [2]河北理工大学,电气工程学院,河北石家庄050222

出　　处：《微型电脑应用》2023年第4期10-12,共3页Microcomputer Applications

基　　金：国家自然科学基金(50775157)。

摘　　要：DBA算法大多是基于单波长情况而制定的,为了研究多波长的情况,提出基于预测的多波长动态带宽分配算法(PD-DWDBA)。考虑到网络中不同类型业务对网络时延和带宽的要求存在差别,对不同优先级的业务采取不同的分配方案,提出支持QoS的PD-DWDBA。以first-fit策略将带宽先分配给具备高优先级业务,确保高优先级业务获得所需带宽;利用WF-DBA策略对剩余各低优先级业务实施分配,利用BP网络模型完成各优先级业务的预测,实现带宽的分配功能。依次以丢包率、包延时、带宽利用率指标分析BP网络预测对网络性能提升的效果,实验结果证实网络服务水平显著提升。DBA algorithms are mostly based on the situation of single wavelength.In order to improve the situation of multiple wavelengths,the multiple wavelength dynamic bandwidth allocation algorithm(PD-DWDBA)is put forward based on prediction.Considering the network of different types of business to network latency and bandwidth requirements,different schemes are taken for different priorities of business,and a PD-DWDBA which supports QoS is proposed.Bandwidth is allocated in high-priority services by a first-fit policy to ensure that high-priority services can obtain the required bandwidth.The WF-DBA strategy is used to allocate the remaining low-priority services,and the neural network model is used to predict the priority services and realize the bandwidth allocation function.The effect of neural network prediction on network performance improvement is analyzed in terms of packet loss rate,packet delay and bandwidth utilization.The experimental results show that the quality of services is significantly improved.

关 键 词：无线传感网络 多波长动态带宽分配算法 BP网络预测 网络服务 

分 类 号：TN92[电子电信—通信与信息系统]