高效低碰撞的太赫兹无线定向MAC协议  

Terahertz Wireless Directional MAC Protocol with High Efficiency and Low Collision

作　　者：任智[1] 赵英杰 梁建 阳路杰 REN Zhi;ZHAO Yingjie;LIANG Jian;YANG Lujie(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：《小型微型计算机系统》2024年第5期1235-1240,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(61971080)资助。

摘　　要：针对网络中节点在争用访问时期发送消息碰撞、时隙分配机制低效和空闲时隙浪费等问题,提出了一种高效低碰撞的太赫兹无线定向MAC协议.文中提出了3种新机制,分别是基于缓存权重的分组机制、复用竞争机制以及时隙分配机制.首先,在微网控制器(Piconet Coordinator,PNC)中生成缓存映射表记录节点的缓存情况;然后,根据缓存映射表为节点分组,节点在分组对应的时隙中进行时隙请求,PNC根据节点缓存为节点分配时隙;最后,未申请到时隙的节点利用剩余时隙进行复用竞争操作.仿真结果表明,所提出的方案有效地提高了网络的吞吐量,减少了消息碰撞率并降低了平均时延.In order to solve the problems of message collision,inefficient slot allocation mechanism and waste of idle slots in the network when nodes are competing for access,an efficient and low collision terahertz wireless directional MAC protocol is proposed.In this paper,three new mechanisms are proposed,which are packet mechanism based on cache weight,multiplexing competition mechanism and slot allocation mechanism.First,a mapping cache table is designed in the Piconet Coordinator(PNC)to record the cache conditions of nodes;Then,the nodes are grouped according to the cache mapping table,and the nodes request timeslots in the packet timeslot.PNC allocates timeslots for nodes according to the node cache;Finally,nodes that have not applied for time slots use the remaining time slots to perform multiplexing competition operations.The simulation results show that the proposed scheme effectively improves the network throughput,reduces the message collision rate and reduces the average completion delay.

关 键 词：太赫兹网络 定向通信 缓存权重 节点分组 时隙分配 

分 类 号：TP915[自动化与计算机技术]