随机多址接入的分布式排队技术  

Overview of technologies of distributed queuing for random multi-access

作　　者：王文鼐[1,2] 万洺瑜 王斌[1,2] 吴炜[1] WANG Wennai;WAN Mingyu;WANG Bin;WU Wei(College of Telecommunications&Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Key Lab of Broadband Wireless Communication and Sensor Network Technology,Ministry of Education,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;College of Overseas Education,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京邮电大学宽带无线通信与传感网技术教育部重点实验室,江苏南京210003 [3]南京邮电大学海外教育学院,江苏南京210023

出　　处：《南京邮电大学学报（自然科学版）》2020年第5期168-177,共10页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

摘　　要：共享信道冲突控制是随机多址接入的技术关键,发展形成了纯Aloha、时隙Aloha和载波侦听多址等各类算法及协议。分布式排队(Distributed Queuing,DQ)综合了Aloha和统计时分复用手段,通过树形算法实现冲突的高效分解与信道的有序分配,能适配物联网终端的应用需求。文中对比分析随机多址技术的特点与应用方法,论述DQ控制机制、性能评测手段和应用扩展方案,简要讨论定时同步问题。The resolution of collision over a shared channel is the central issue in the technologies of ran­dom multi-access,where a series of algorithms and protocols have been invented,including pure-Aloha,slotted-Aloha and carrier sense multi-access.Distributed queuing(DQ)integrated the technologies of Aloha and statistical time-division multiplexing by a contention-tree algorithm to resolve collision and as­sign channel-slot in order.DQ has a great of flexibility and adaptability in applying for IoT terminals.By comparing and analyzing the technical characteristics and application schemes for random multi-access,this paper provides an overview of DQ in the aspects of typical mechanism,performance evaluations and application extensions,and discusses problems on the timing and synchronization.

关 键 词：随机多址接入 分布式排队 冲突解决 网络性能 定时同步 

分 类 号：TN915[电子电信—通信与信息系统]