基于自发数据传输的高效双LAN太赫兹无线局域网MAC协议  

High-efficiency dual-LAN Terahertz WLAN MAC protocol based on spontaneous data transmission

作　　者：任智[1,2,3] 古金东 刘洋[1,2,3] 陈春宇 REN Zhi;GU Jindong;LIU Yang;CHEN Chunyu(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Key Laboratory of Mobile Communications Technology of Chongqing,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Engineering Research Center of Mobile Communications of Ministry of Education,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065 [3]重庆邮电大学移动通信教育部工程研究中心,重庆400065

出　　处：《计算机应用》2024年第2期519-525,共7页journal of Computer Applications

基　　金：国家自然科学基金资助项目(61971080)。

摘　　要：针对现有的双局域网(LAN)太赫兹无线局域网(Dual-LAN THz WLAN)相关介质访问控制(MAC)协议中存在的某些节点会在多个超帧内重复发送相同的信道时隙请求帧以申请时隙资源以及网络运行的一些时段存在空闲时隙等问题,提出一种基于自发数据传输的高效MAC协议——SDTE-MAC(high-Efficiency MAC protocol based on Spontaneous Data Transmission)。SDTE-MAC通过让各节点都维护一张或多张时间单元链表,使各节点与其余节点在网络运行时间上达到同步,从而获悉各节点应该在信道空闲时隙的什么位置开始发送数据帧,优化了传统的信道时隙分配和信道剩余时隙再分配的流程,提高了网络吞吐量和信道时隙利用率,降低了数据时延,能够进一步提升双LAN太赫兹无线局域网的性能。仿真结果表明,网络饱和时,相较于AHT-MAC(Adaptive High Throughout multi-pan MAC protocol)中的N-CTAP(Normal Channel Time Allocation Period)时段时隙资源分配新机制以及自适应缩短超帧时段机制,SDTE-MAC的MAC层吞吐量提升了9.2%,信道时隙利用率提升了10.9%,数据时延降低了22.2%。In the existing Dual LAN(Local Area Network)Terahertz Wireless LAN(Dual-LAN THz WLAN)related MAC(Medium Access Control)protocol,some nodes may repeatedly send the same Channel Time Request(CTRq)frame within multiple superframes to apply for time slot resources and idle time slots exist in some periods of network operation,therefore an efficient MAC protocol based on spontaneous data transmission SDTE-MAC(high-Efficiency MAC Protocol based on Spontaneous Data Transmission)was proposed.SDTE-MAC protocol enabled each node to maintain one or more time unit linked lists to synchronize with the rest of the nodes in the network running time,so as to know where each node started sending data frames at the channel idle time slot.The protocol optimized the traditional channel slot allocation and channel remaining slot reallocation processes,improved network throughput and channel slot utilization,reduced data delay,and could further improve the performance of Dual-LAN THz WLAN.The simulation results showed that when the network saturates,compared with the new N-CTAP(Normal Channel Time Allocation Period)slot resource allocation mechanism and adaptive shortening superframe period mechanism in the AHT-MAC(Adaptive High Throughout multi-pan MAC protocol),the MAC layer throughput of the SDTE-MAC protocol was increased by 9.2%,the channel slot utilization was increased by 10.9%,and the data delay was reduced by 22.2%.

关 键 词：太赫兹波 超帧结构 无线局域网 多跳通信 时隙分配 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]