Spiral trajectory of a mobile beacon

In this post, we will see an another mobile beacon trajectories called Spiral.

clc
clear all
close all

%% Deployment of the nodes and anchor nodes

N=100;   % Total Number of  Sensors
A=10;    % Total Number of Anchors
X=100;   % Area length
Y=100;   % Area width
R=10;     % Transmission radius (m)

[s_x,s_y]=create_distribution(N,X,Y); %Static sensors random distribution
plot(s_x,s_y,'bo'); % plot the sensor distribution
hold on
[a_x,a_y]=Spiral(R,s_x,s_y)
plot(a_x,a_y,'mo'); % plot the anchor distribution
grid on
hold on
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%% Create Distribution Function (Create a new file and paste the below code and saved the file as create_distribution.m)

function[s_x,s_y]=create_distribution(N,X,Y)

     s_x = rand(1,N)*X;  % Sensor random distribution of X axis
     s_y = rand(1,N)*Y;   % Sensor random distribution of Y axis

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function[anchor_x, anchor_y]=Spiral(r,node_x,node_y) 
%% Mobility Model 

anchor_x=[]; % Anchor trajectory
anchor_y=[]; % Anchor trajectory
idx=1;
beacon_int=5; % Beacon broadcasting interval
t = linspace(0,12*pi,10000);
for k=1:1:length(t)
    point_x(1,k) = 50+2*t(k).*cos(t(k));
    point_y(1,k) = 50+2*t(k).*sin(t(k));
end
anchor_x(1,idx)=point_x(1,1);
anchor_y(1,idx)=point_y(1,1);
pointx=point_x(1,1);
pointy=point_y(1,1);
idx=idx+1;
len=length(point_x(1,:));
for j=1:1:len
    Find= calc_dist([pointx,pointy],[point_x(1,j),point_y(1,j)]);    
    if Find>4.8&&Find<5 .2="" span="">
        anchor_x(1,idx)=point_x(1,j);
        anchor_y(1,idx)=point_y(1,j);
        pointx=anchor_x(1,idx);
        pointy=anchor_y(1,idx);
        idx=idx+1;
    end
end
plot(point_x(1,:),point_y(1,:))
hold on

for i=1:idx-1              % shows animated output
    Ax=anchor_x(1,i);
    Ay=anchor_y(1,i);
    plot(node_x,node_y,'.');
    hold on
    plot(Ax,Ay,'r*')
    xlim([0 100])
    ylim([0 100])
    draw_circle1(Ax,Ay,r,'r')
    hold on
    pause(0.05)

end

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Spiral trajectory of a mobile beacon

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To get the above, please click on the link as given below.......

https://drive.google.com/drive/folders/0B2O8tJ9QXc-3SFhFVG05REMwMHM?usp=sharing