| 摘要: |
| 针对太赫兹无线局域网定向网络中重要信息传输优先级不足以及时隙请求帧碰撞的问题，提出了一种多优先级的自适应太赫兹无线局域网定向MAC(Medium Access Control)协议——PA-MAC(Priority-based Adaptive Time Slot Request MAC)。PA-MAC协议采用基于数据业务类型的优先级划分机制，为不同优先级节点赋予不同的退避窗口大小，确保重要信息优先传输；采用基于优先级的新型CAP(Contention Access Period)时段划分机制，降低了碰撞概率；采用基于节点状态的自适应申请时隙机制，提高了时隙利用率。与现有相关协议相比，PA-MAC协议使节点申请到更多的剩余时隙资源，使时隙利用率最大提升了5.89%，网络吞吐量提高了5.86%，数据传输成功率最大提升了6.23%。 |
| 关键词: 太赫兹无线局域网 优先级划分 定向通信 MAC 协议 |
| DOI：10.20079/j.issn.1001-893x.240618003 |
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| 基金项目: |
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| A Multi-priority Adaptive Terahertz Directional MAC Protocol for Wireless LANs |
| REN Zhi,ZHANG Weiye,QI Junyi,LYU Yuchao |
| (School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China) |
| Abstract: |
| In order to address the problems of insufficient priority for transmission of important information and collision of time slot request frames in terahertz directional wireless local area network(WLAN),a multi-priority adaptive terahertz WLAN directional medium access control(MAC) protocol,priority-based adaptive time slot request MAC(PA-MAC),is proposed.The PA-MAC protocol adopts a priority division mechanism based on the type of data service,and different priority nodes are given different avoidance window sizes to ensure that important information is transmitted first;it adopts a new type of contention access period(CAP) time slot division mechanism based on the priority,which reduces the probability of collision;and it adopts a node state-based adaptive application time slot mechanism,which improves time slot utilization.Compared with the existing protocols,the PA-MAC protocol enables the nodes to apply for more remaining time slot resources,which increases the time slot utilization rate by 5.89%,the network throughput by 5.86%,and the data transmission success rate by 6.23%. |
| Key words: terahertz wireless LANs priority division directional communication MAC protocol |
