多跳虚拟MIMO系统中随机接入的MAC方案  

MAC scheme of random access in multi-hop virtual MIMO system

作　　者：鲍晶晶[1] 董华锋[2] BAO Jing-jing;DONG Hua-feng(Electronics and Information School,Dongguan Polytechnic,Dongguan 523808,China;School of Physics and Optoelectronics,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]东莞职业技术学院电子信息学院,广东东莞523808 [2]广东工业大学物理与光电工程学院,广东广州510006

出　　处：《计算机工程与设计》2023年第7期1944-1951,共8页Computer Engineering and Design

基　　金：广东省普通高校特色创新基金项目(2022KTSCX329):广东省教育厅2021年度(工程技术研究中心)基金项目(2021GCZX016):东莞职业技术学院智能终端及智能制造专项基金项目(ZXE003)。

摘　　要：针对多跳虚拟多输入多输出系统及其动态资源分配进行研究。基于信道模型构建多跳虚拟多输入多输出系统的传播和连接模型,并提出一种分布式MAC方案。通过一个帧ALOHA协议把时间轴分割成帧(每一帧由给定数量的时隙构成),将时隙资源独立分配给每一跳,多跳链中的每个虚拟天线阵列随机选择一个时隙,实现在每一跳上的节点独立选择无线资源;对基于帧ALOHA协议的系统性能进行详细分析,得到它们的解析表达式。仿真结果表明,所提方案有较好的系统性能,优于集中式资源分配方案。Multi-hop virtual multiple-input multiple-output system and its dynamic resource allocation were studied.The propagation and connection model of multi-hop virtual multiple-input multiple-output system was built based on the channel model.And a distributed MAC scheme was proposed.A frame ALOHA protocol was used to divide the time axis into frames,each frame was composed of a given number of slots,and the slot resources were allocated to each hop independently.Each virtual antenna array in the multi-hop chain randomly selected a slot to realize the independent selection of wireless resources on each hop node.The system performance based on framed ALOHA protocol was analyzed in detail and their analytical expressions were derived.The simulation results show that the proposed scheme not only has better system performance,but also outperforms the centralized resource allocation scheme.

关 键 词：多输入多输出系统 多址接入控制 多跳链路 虚拟天线阵列 帧ALOHA协议 中断概率 遍历容量 

分 类 号：TN911.23[电子电信—通信与信息系统]