FiWi网络低延迟分布式动态带宽分配算法  

Low latency distributed dynamic bandwidth allocation algorithm in FiWi networks

作　　者：朱悦 何荣希[1] 陈晓静[1,2] ZHU Yue;HE Rongxi;CHEN Xiaojing(College of Information Science and Technology,Dalian Maritime University,Dalian Liaoning 116026,China;Dalian University of Science and Technology,Dalian Liaoning 116052,China)

机构地区：[1]大连海事大学信息科学技术学院,辽宁大连116026 [2]大连科技学院,辽宁大连116052

出　　处：《光通信技术》2020年第7期40-46,共7页Optical Communication Technology

基　　金：国家自然科学基金项目(61371091、61801074)资助;大连市科技创新基金项目(2019J11CY015)资助。

摘　　要：针对光纤无线网络已有动态带宽分配算法时延较大、信道利用率较低的问题,提出一种低延迟分布式动态带宽分配算法。该算法每个轮询周期包含无线请求报告和上行数据传输两个子周期,可在无线信道和上行信道并行进行。无线请求报告子周期采用双向轮询方式,而且节点回传Gate帧与上传数据也并行进行。仿真结果表明:该算法可降低数据包平均时延和节点平均队列长度,提高上行信道利用率。In order to solve the problems of large delay and low channel utilization of existing dynamic bandwidth allocation(DBA)algorithms in fiber-wireless(FiWi)networks,a low latency distributed DBA(LLD-DBA)algorithm is proposed.Each polling cycle of LLD-DBA consists of two sub-cycles of wireless reporting and upstream data transmission,which can be carried out in parallel on the wireless channel and the upstream channel,respectively.The bidirectional polling is adopted in the sub-cycle of wireless reporting,and each node can transmit the Gate frame to its neighbor node and upload its data in parallel.Extensive simulation results show that compared with the existing algorithms,the proposed algorithm can reduce the average packet delay,average queue length of nodes,and improve the utilization of upstream channel.

关 键 词：光纤无线网络 动态带宽分配 分布式 双向轮询 并行 

分 类 号：TN929.11[电子电信—通信与信息系统]