| 摘要: |
| 针对太赫兹无线个域网双信道媒体访问控制（Medium Access Control,MAC）协议中存在的信道资源分配公平性差、数据帧重传效率低和控制开销较高的问题，提出了一种公平高效的MAC层优化机制。新机制采用基于历史时隙申请信息的信道资源分配策略优化时隙分配公平性，根据信道质量自适应选择数据帧重传机制，控制节点从申请时隙的节点发送的控制帧中的“duration”字段提取时隙申请信息，省略时隙申请帧的发送，从而降低数据帧排队时延和控制开销，提高吞吐量。仿真结果表明，与TAB-MAC和MDP-MAC协议的机制相比，所提机制的数据帧平均排队时延降低了15%，吞吐量提高了5%。 |
| 关键词: 太赫兹无线个域网 媒体访问控制协议 时隙分配公平性 |
| DOI：10.20079/j.issn.1001-893x.211219004 |
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| 基金项目:国家自然科学基金资助项目（61971080） |
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| A fair and efficient MAC layer optimization mechanism for terahertz wireless personal area networks |
| HUO Bing,ZHOU Xun,REN Zhi |
| (School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China) |
| Abstract: |
| In view of the dual-channel medium access control(MAC) protocol of the terahertz wireless personal area networks(WPANs) has the problems of poor fairness of channel resource allocation,low efficiency of data frame retransmission and high control overhead,a fair and efficient MAC layer optimization mechanism is proposed.The fairness of slot allocation is optimized by the channel resource allocation strategy based on the history slot request information,and the data frame retransmission mechanism is selected adaptively according to the channel quality,the control node extracts the time slot request information from the “duration” field in the control frame sent by the node of the application slot to omit the transmission of the time slot request frame so as to reduce the data frame queuing delay and control overhead,and improve the throughput.The simulation results show that compared with that of TAB-MAC and MDP-MAC,the average queuing time of the data frame of the proposed mechanism is reduced by 15%,and the throughput is improved by 5%. |
| Key words: terahertz wireless personal area network(WPAN) MAC protocol fairness of slot allocation |
《电讯技术》编辑部 