clear;
clc;
close all;
% Parameters
numVehicles = 100; % Number of vehicles
numEdges = 3; % Number of edge computing nodes
cloudProcessingTime = 20; % Time taken by the cloud to process a task (in seconds)
edgeProcessingTime = 10; % Time taken by an edge node to process a task (in seconds)
taskGenerationRate = 0.2; % Task generation rate per vehicle (tasks/second)
cloudDelay = 5; % Communication delay for offloading to cloud (in seconds)
edgeDelay = 2; % Communication delay for offloading to edge (in seconds)
simulationTime = 100; % Simulation time (in seconds)
% Initialize vehicles
vehicles = repmat(struct('tasks', []), numVehicles, 1);
% Initialize edge nodes
edges = repmat(struct('tasks', []), numEdges, 1);
% Initialize cloud
cloudTasks = [];
% Simulation loop
for t = 1:simulationTime
% Generate tasks for vehicles
for i = 1:numVehicles
if rand < taskGenerationRate
vehicles(i).tasks = [vehicles(i).tasks; t];
end
end
% Process tasks at edge nodes
for j = 1:numEdges
if ~isempty(edges(j).tasks)
completedTasks = edges(j).tasks(edges(j).tasks <= t - edgeDelay - edgeProcessingTime);
edges(j).tasks = setdiff(edges(j).tasks, completedTasks);
disp(['Edge node ', num2str(j), ' processed ', num2str(length(completedTasks)), ' tasks']);
end
end
% Process tasks at cloud
if ~isempty(cloudTasks)
completedTasks = cloudTasks(cloudTasks <= t - cloudDelay - cloudProcessingTime);
cloudTasks = setdiff(cloudTasks, completedTasks);
disp(['Cloud processed ', num2str(length(completedTasks)), ' tasks']);
end
% Offload tasks from vehicles to edge nodes or cloud
for i = 1:numVehicles
if ~isempty(vehicles(i).tasks)
task = vehicles(i).tasks(1);
vehicles(i).tasks(1) = [];
% Decide whether to offload to edge or cloud (simple random choice)
if rand < 0.5
% Offload to edge node
[~, minEdge] = min(arrayfun(@(x) length(x.tasks), edges));
edges(minEdge).tasks = [edges(minEdge).tasks; task];
disp(['Task ', num2str(task), ' from vehicle ', num2str(i), ' offloaded to edge ', num2str(minEdge)]);
else
% Offload to cloud
cloudTasks = [cloudTasks; task];
disp(['Task ', num2str(task), ' from vehicle ', num2str(i), ' offloaded to cloud']);
end
end
end
end
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