【控制】基于Matlab实现5GNR—V2X拥塞控制算法

95 阅读 0 评论 63 点赞

我是靠谱客的博主机智芝麻，最近开发中收集的这篇文章主要介绍【控制】基于Matlab实现5GNR—V2X拥塞控制算法，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

✅作者简介：热爱科研的Matlab仿真开发者，修心和技术同步精进，matlab项目合作可私信。

????个人主页：Matlab科研工作室

????个人信条：格物致知。

更多Matlab仿真内容点击????

智能优化算法神经网络预测雷达通信无线传感器电力系统

信号处理图像处理路径规划元胞自动机无人机

⛄ 内容介绍

随着汽车行业需求的增长，3GPP正在开发长期演进（LTE）蜂窝技术中的新功能，以专门解决车对所有（V2X）连接，特别是车对车（V2V）直接通信。在涉及安全性，交通管理或信息娱乐的大多数已启用应用程序的基础上，协作意识服务尤为重要，它对应于所有车辆在广播中定期发送的消息，以告知其状态和意图。为了优化无线电资源的使用，需要巧妙地执行数据包分配，遵循目前代表着一个具有挑战性的开放性问题的算法。考虑到解决协作意识时要面对LTE-V2V网络中资源分配的设计和验证，我们实现了一个名为LTEV2Vsim的模拟器，该模拟器将与所有感兴趣的研究人员共享。 LTEV2Vsim用MATLAB编写，可按照简单的模型或更复杂，更实际的输入文件管理车辆的机动性，并根据不同的已实现算法（包括网络控制和自主算法）执行分配。最后，为了演示LTEV2Vsim的可能性，提供了一些示例结果

⛄ 部分代码

% Simplified scenario to use WilabV2Xsim

% Packet size and MCS are set accordingly to utilize the whole channel

% Each transmission uses all the subchannels available.

% NR-V2X is considered for these simulations

% WiLabV2Xsim('help')

close all % Close all open figures

clear % Reset variables

clc % Clear the command window

packetSize=1000; % 1000B packet size

nTransm=1; % Number of transmission for each packet

sizeSubchannel=10; % Number of Resource Blocks for each subchannel

Raw = [50, 150, 300]; % Range of Awarness for evaluation of metrics

speed=70; % Average speed

speedStDev=7; % Standard deviation speed

SCS=15; % Subcarrier spacing [kHz]

pKeep=0.4; % keep probability

periodicity=0.1; % periodic generation every 100ms

sensingThreshold=-126; % threshold to detect resources as busy

% Configuration file

configFile = 'Highway3GPP.cfg';

%% NR-V2X PERIODIC GENERATION

for BandMHz=[10]

if BandMHz==10

MCS=11;

elseif BandMHz==20

MCS=5;

end

for rho=[100 200 300] % number of vehicles/km

% Just for visualization purposes the simulations time now are really short,

% when performing actual simulation, each run should take at least

% 30mins or one hour of computation time.

if rho==100

simTime=10; % simTime=300

elseif rho==200

simTime=5; % simTime=150;

elseif rho==300

simTime=3; % simTime=100;

end

% HD periodic

outputFolder = sprintf('Output/NRV2X_%dMHz_periodic',BandMHz);

% Launches simulation

WiLabV2Xsim(configFile,'outputFolder',outputFolder,'Technology','5G-V2X','MCS_NR',MCS,'SCS_NR',SCS,'beaconSizeBytes',packetSize,...

'simulationTime',simTime,'rho',rho,'probResKeep',pKeep,'BwMHz',BandMHz,'vMean',speed,'vStDev',speedStDev,...

'cv2xNumberOfReplicasMax',nTransm,'allocationPeriod',periodicity,'sizeSubchannel',sizeSubchannel,...

'powerThresholdAutonomous',sensingThreshold,'Raw',Raw,'FixedPdensity',false,'dcc_active',false,'cbrActive',true)

end

%% PLOT of results

figure

hold on

grid on

for iCycle=1:3

rho=100*iCycle;

% Loads packet reception ratio output file

xMode2_periodic=load(outputFolder + "/packet_reception_ratio_"+num2str(iCycle)+"_5G.xls");

% PRR plot

% it takes the first column and the last column

plot(xMode2_periodic(:,1),xMode2_periodic(:,end),'linewidth',2.5,'displayName',"Mode2, periodic generation, vehicles/km=" + num2str(rho))

end

legend()

title("NR-V2X, " + num2str(BandMHz) + "MHz, MCS=" + num2str(MCS))

legend('Location','southwest')

xlabel("Distance [m]")

ylabel("PRR")

yline(0.95,'HandleVisibility','off');

⛄ 运行结果

⛄ 参考文献

G. Cecchini, A. Bazzi, B. M. Masini, A. Zanella, “LTEV2Vsim: An LTE-V2V Simulator for the Investigation of Resource Allocation for Cooperative Awareness”, 5th IEEE International Conference on Models and Technologies for Intelligent Transportation Systems (MT-ITS 2017), Naples (Italy), 26-28 June 2017. (Results obtained with version 1.0)

A. Bazzi, G. Cecchini, M. Menarini, B. M. Masini, A. Zanella, “Survey and Perspectives of Vehicular Wi-Fi Versus Sidelink Cellular-V2X in the 5G Era,” invited paper in Future Internet, 29 May 2019, 11(6), 122. DOI: 10.3390/fi11060122 (Results obtained with version 3.5)