一种MIMO移动自组织网络的物理层与MAC层联合设计  

Joint Design of Physical Layer and MAC Layer of MIMO Mobile Ad hoc Network

作　　者：朴德江 肖子雄 蒋轶 PIAO Dejiang;XIAO Zixiong;JIANG Yi(Department of Communication Science and Engineering,Fudan University,Shanghai 200433,China)

机构地区：[1]复旦大学信息科学与工程学院,上海200433

出　　处：《微型电脑应用》2020年第12期5-8,共4页Microcomputer Applications

基　　金：国家自然科学基金(61771005)。

摘　　要：多天线MIMO技术不但能够提高点对点通信的传输效率,而且能在无线网络通信场景中实现空分多址,并发传输多路数据流,提高网络吞吐效率。针对MIMO技术在移动自组织网络中的应用,考察其所能带来的通信性能提升,提出一种结合物理层MIMO技术和多址接入层(MAC)多用户协同CSMA/CA协议的联合设计方案。它通过RTS/CTS获得信道状态信息,以完成波束赋形、自适应速率选择和功率控制,并基于更新网络分配向量(network allocation vector/NAV)的回避算法维护多对节点间的同时同频通信链路。MATLAB仿真结果表明文中所提出的设计带来了显著的性能提升。Multi-input multi-output(MIMO)technology can improve the transmission efficiency not only in the point-to-point communications but also in the network scenario through establishing multiple concurrent transmission links.This paper discusses the application of MIMO technology in mobile Ad hoc networks(MANET),and examines the communication performance improvements.We propose a PHY-MAC joint design scheme that combines physical layer(PHY)MIMO methods with the CSMA/CA protocol in the media access control(MAC)layer.It obtains the channel state information through RTS/CTS to complete precoding/beamforming,adaptive rate selection and power control.The concurrent co-channel communication link between multiple pairs of nodes is maintained by the CSMA/CA protocol using the network allocation vector(NAV).MATLAB simulation results show that the proposed design can achieve significant performance improvements.

关 键 词：MIMO 波束赋形 移动自组织网络 CSMA/CA 多用户协同 自适应速率选择 功率控制 

分 类 号：TN92[电子电信—通信与信息系统]