initial commit of EdgeCloudSim

EdgeCloudSim with default network model, mobility model,  load generator
model, edge orchestrator, and VM CPU utilization model

src/edu/boun/edgecloudsim/network/NetworkModel.java

@@ -0,0 +1,37 @@
+/*
+ * Title:        EdgeCloudSim - Network Model
+ * 
+ * Description: 
+ * NetworkModel is an abstract class which is used for calculating the
+ * network delay from device to device. For those who wants to add a
+ * custom Network Model to EdgeCloudSim should extend this class and
+ * provide a concreate instance via ScenarioFactory
+ *               
+ * Licence:      GPL - http://www.gnu.org/copyleft/gpl.html
+ * Copyright (c) 2017, Bogazici University, Istanbul, Turkey
+ */
+
+package edu.boun.edgecloudsim.network;
+
+public abstract class NetworkModel {
+	protected int numberOfMobileDevices;
+
+	public NetworkModel(int _numberOfMobileDevices){
+		numberOfMobileDevices=_numberOfMobileDevices;
+	};
+	
+	/**
+	* initializes costom network model
+	*/
+	public abstract void initialize();
+	
+    /**
+    * calculates the upload delay from source to destination device
+    */
+	public abstract double getUploadDelay(int sourceDeviceId, int destDeviceId);
+	
+    /**
+    * calculates the download delay from source to destination device
+    */
+	public abstract double getDownloadDelay(int sourceDeviceId, int destDeviceId);
+}