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目录
💥1 概述
📚2 运行结果
🎉3 参考文献
👨💻4 Matlab代码
💥1 概述
此代码优化了由于电池耗尽而产生覆盖空洞后 WSN 节点的位置。如果活动通信中的任何节点死亡，则通过PSO优化再次定位其余节点，将覆盖区域最大化作为目标函数。
📚2 运行结果
主函数部分代码：
close all
clear
clc
addpath(genpath(cd))
warning('off')
%%
N=10; % number of nodes
area=[10,10]; % nodes deployment area in meter
Trange=2; % transmission range of sensor node in meter
nodes.pos=area(1).*rand(N,2);% nodes geographical locations
lambda=0.125; % signal wavelength in meter
nodes.major = Trange; % major axis for ellpitical range in meter
nodes.minor = lambda*Trange; % minro axis for ellipitical range in meter
% redundantNo=9; % number of healing nodes
redundantNo=round(10*N/100);
%% plot the nodes deployment
cnt=1;
for ii=1:N for jj=1:Nif ii~=jjnodes.distance(ii,jj)=pdist([nodes.pos(ii,:);nodes.pos(jj,:)]);if nodes.distance(ii,jj)<Trange || nodes.distance(ii,jj)==Trangenodes.inrange(ii,jj)=1;elsenodes.inrange(ii,jj)=0;endendend
end
figure
F5=plot(nodes.pos(:,1),nodes.pos(:,2),'.','color','r');
hold on
for ii=1:N % plot the circular transmission range[nodes.circle.x(ii,:),nodes.circle.y(ii,:)]=circle(nodes.pos(ii,1),nodes.pos(ii,2),Trange);F6=fill(nodes.circle.x(ii,:),nodes.circle.y(ii,:),[0.25,0.25,0.25]);alpha 0.3hold on
end
axis on
xlabel('x(m)')
ylabel('y(m)')
title('Initial Placement of Nodes with circular transmission range')
%% plot delauny triangle
TRI = delaunay(nodes.pos(:,1),nodes.pos(:,2));
figure(2)
F5 = plot(nodes.pos(:,1),nodes.pos(:,2),'.','color','r');
hold on
for ii=1:N % plot the circular transmission range[nodes.circle.x(ii,:),nodes.circle.y(ii,:)]=circle(nodes.pos(ii,1),nodes.pos(ii,2),Trange);F6=fill(nodes.circle.x(ii,:),nodes.circle.y(ii,:),[0.25,0.25,0.25]);alpha 0.3hold on
end
axis on
xlabel('x(m)')
ylabel('y(m)')
title('Coverage hole in initila position of Nodes')
hold on
triplot(TRI,nodes.pos(:,1),nodes.pos(:,2))
%% Hole detection
[holeDetected.circle,Circmcenter.circle,circumradius.circle]=holeDetection(TRI,nodes,F5,F6,Trange,area,2,1);
display(['--> No of detected Holes for Circular = ',num2str(numel(find(holeDetected.circle)))])
%% PSO optimize position of rest wsn nodes to cover the hole
nvars = 2*(N);
fun=@(x)objf(x,Trange,area);
lb=zeros(nvars,1);
ub=area(1).*ones(nvars,1);
options = optimoptions(@particleswarm,'Display','iter','MaxIterations',100,'PlotFcn','pswplotbestf');
[x,fval] = particleswarm(fun,nvars,lb,ub,options);
finalPos = reshape(x,[numel(x)/2,2]);
% plot the final tuned Node' pos
figure
plot(finalPos(:,1),finalPos(:,2),'
o
','
color
','
r
');
hold on
for ii=1:N % plot the circular transmission range[finalcircle.x(ii,:),finalcircle.y(ii,:)]=circle(finalPos(ii,1),finalPos(ii,2),Trange);fill(finalcircle.x(ii,:),finalcircle.y(ii,:),[0.25,0.25,0.25]);alpha 0.3hold on
end
🎉3 参考文献
[1]史朝亚. 基于PSO算法无线传感器网络覆盖优化的研究[D]. 南京理工大学.
部分理论引用网络文献，若有侵权联系博主删除。