一种移动感知的太赫兹无线局域网定向MAC协议  

A Mobility-aware Directional MAC Protocol for Terahertz WLANs

作　　者：任智[1] 陈春宇 古金东 姚毅[1] REN Zhi;CHEN Chunyu;GU Jindong;YAO Yi(School of Communication and Information Engineering,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

出　　处：《电讯技术》2024年第5期725-731,共7页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61971080)。

摘　　要：现有太赫兹无线局域网定向MAC(Medium Access Control)协议中,节点移动情况下PNC(PicoNet)发送beacon帧时存在部分控制字段浪费、CTAP(Channel Time Allocation Period)中PNC与DEV(Device)进行波束赋形开销偏大等问题。为此,提出了一种移动感知的太赫兹无线局域网定向MAC(Mobility-aware Directional MAC,MA-MAC)协议。该协议采用基于卡尔曼算法的节点扇区预测机制对移动节点的扇区范围进行迭代预测,采用基于DEV扇区预测的beacon帧内容填充机制对beacon帧中时隙分配字段进行填充,采用基于节点扇区预测的快速波束赋形机制使得PNC与DEV之间波束赋形操作简化。通过仿真验证,与基于IEEE 802.15.3c的太赫兹无线局域网定向MAC协议和现有协议进行对比,MA-MAC协议下网络吞吐量得到了提升,网络平均时延、网络整体控制开销得到了改善。In the existing Medium Access Control(MAC)protocol for terahertz wireless local area networks(WLANs),a mobility-aware directional MAC(MA-MAC)protocol for terahertz WLANs is proposed to address the issues of partial control field waste when PicoNet(PNC)sends beacon frames while nodes are moving,and high beamforming overhead between PNC and Device(DEV)in Channel Time Allocation Period(CTAP).The MA-MAC protocol uses a node sector prediction mechanism based on the Kalman algorithm to iteratively predict the sector range of mobile nodes.The beacon frame content filling mechanism based on DEV sector prediction is used to fill in the slot allocation field in the beacon frame.The fast beamforming mechanism based on node sector prediction simplifies the beamforming operation between PNC and DEV.Through simulation verification,the proposed MA-MAC protocol is compared with the terahertz WLAN directed MAC protocol based on IEEE 802.15.3c and existing protocols.The networks throughput under the MA-MAC protocol is improved,and the average networks latency and overall networks control overhead are both improved.

关 键 词：太赫兹无线局域网 定向通信 MAC协议 移动感知 

分 类 号：TN925.93[电子电信—通信与信息系统]