diff --git a/src/main/java/fr/ntr/AccessPoint.java b/src/main/java/fr/ntr/AccessPoint.java
index 0a1170e..3cdca29 100644
--- a/src/main/java/fr/ntr/AccessPoint.java
+++ b/src/main/java/fr/ntr/AccessPoint.java
@@ -7,7 +7,7 @@ import java.util.Random;
 import fr.ntr.scheduler.Scheduler;
 
 public class AccessPoint {
-    private List<User> users;
+    private List<UserGroup> users;
     private Scheduler scheduler;
     /**
      * nombre de slots
@@ -60,7 +60,7 @@ public class AccessPoint {
     private void init(int nbUsers) {
         double[] distance = { 200d, 500d };
         for (int i = 0; i < nbUsers; i++) {
-            User user = new User(distance[i], timeSlotNb, subCarrierNb);
+            UserGroup user = new UserGroup(distance[i], timeSlotNb, subCarrierNb);
             user.generateBandwidth();
             user.createPackets();
             this.users.add(user);
diff --git a/src/main/java/fr/ntr/Packets.java b/src/main/java/fr/ntr/Packets.java
index d52ecab..deac3ea 100644
--- a/src/main/java/fr/ntr/Packets.java
+++ b/src/main/java/fr/ntr/Packets.java
@@ -5,9 +5,9 @@ public class Packets {
     private int creationTime;
     private int endTimeSending;
     private double bitsNumberRemaining;
-    private User user;
+    private UserGroup user;
 
-    public Packets(int creationTime, int endTimeSending, double bitsNumberRemaining, User user){
+    public Packets(int creationTime, int endTimeSending, double bitsNumberRemaining, UserGroup user){
         this.creationTime = creationTime;
         this.endTimeSending = endTimeSending;
         this.bitsNumberRemaining = bitsNumberRemaining;
diff --git a/src/main/java/fr/ntr/ResourceBlock.java b/src/main/java/fr/ntr/ResourceBlock.java
index ec0bc6d..dc2aebe 100644
--- a/src/main/java/fr/ntr/ResourceBlock.java
+++ b/src/main/java/fr/ntr/ResourceBlock.java
@@ -1,10 +1,10 @@
 package fr.ntr;
 
 public class ResourceBlock {
-    private User user;
+    private UserGroup user;
     private double bandwith;
 
-    public ResourceBlock (User user, double bandwith) {
+    public ResourceBlock (UserGroup user, double bandwith) {
         this.user = user;
         this.bandwith = bandwith;
     }
diff --git a/src/main/java/fr/ntr/User.java b/src/main/java/fr/ntr/UserGroup.java
similarity index 54%
rename from src/main/java/fr/ntr/User.java
rename to src/main/java/fr/ntr/UserGroup.java
index 54581d4..a86c95f 100644
--- a/src/main/java/fr/ntr/User.java
+++ b/src/main/java/fr/ntr/UserGroup.java
@@ -3,14 +3,14 @@ package fr.ntr;
 import java.util.ArrayList;
 import java.util.List;
 
-public class User {
+public class UserGroup {
 
     private final double distance;
     private final double[][] bandwidthTable;
     private final List<Packets> packetsToSend;
     private final List<Packets> packetsSent;
 
-    public User(double distance, int timeSlotNb,  int subCarrierNb) {
+    public UserGroup(double distance, int timeSlotNb,  int subCarrierNb) {
         this.distance = distance;
         this.bandwidthTable = new double[timeSlotNb][subCarrierNb];
         this.packetsToSend = new ArrayList<>();
@@ -22,10 +22,10 @@ public class User {
         double random = Math.random();
         for(int i = 0; i < bandwidthTable.length; i++) {
             for(int j = 0; j < bandwidthTable[i].length; j++) {
-                double h = 8 * Math.sqrt(-2 * Math.log(1 - random));
-                double gain = h * Math.pow(10, random*8/10) * Math.pow(1/this.distance, 3.5);
-                double spectralEfficiency = (43 * gain)/(15000*(-174));
-                double mkn = Math.log1p(spectralEfficiency);
+                double h = 1 * Math.sqrt(-2 * Math.log(1 - random));
+                double gain = h * Math.pow(10, random * 1/10) * Math.pow(1 / this.distance, 3.5);
+                double spectralEfficiency = (43 * gain) / (15000 * (-174));
+                double mkn = Math.log(1 + spectralEfficiency) / Math.log(2);
                 this.bandwidthTable[i][j] = mkn;
             }
         }
@@ -42,4 +42,22 @@ public class User {
         return 0d;
     }
 
+    public double getDistance() {
+        return distance;
+    }
+
+    public double[][] getBandwidthTable() {
+        return bandwidthTable;
+    }
+
+    public List<Packets> getPacketsToSend() {
+        return packetsToSend;
+    }
+
+    public List<Packets> getPacketsSent() {
+        return packetsSent;
+    }
+
+    
+
 }
diff --git a/src/main/java/fr/ntr/scheduler/MaxSNR.java b/src/main/java/fr/ntr/scheduler/MaxSNR.java
index 41e0ceb..3f2c3e6 100644
--- a/src/main/java/fr/ntr/scheduler/MaxSNR.java
+++ b/src/main/java/fr/ntr/scheduler/MaxSNR.java
@@ -1,6 +1,6 @@
 package fr.ntr.scheduler;
 import java.util.List;
-import fr.ntr.User;
+import fr.ntr.UserGroup;
 
 public class MaxSNR extends Scheduler {
 
@@ -11,7 +11,7 @@ public class MaxSNR extends Scheduler {
 	public void scheduling() {
 	} 
 	
-	private void selectionUtilisateur(int Ts, int Sp, List<User> Users) {
+	private void selectionUtilisateur(int Ts, int Sp, List<UserGroup> Users) {
 		
 	}
 
diff --git a/src/main/java/fr/ntr/scheduler/ProportionalFair.java b/src/main/java/fr/ntr/scheduler/ProportionalFair.java
index 1e0b650..5bb98e0 100644
--- a/src/main/java/fr/ntr/scheduler/ProportionalFair.java
+++ b/src/main/java/fr/ntr/scheduler/ProportionalFair.java
@@ -2,7 +2,7 @@ package fr.ntr.scheduler;
 
 import java.util.List;
 
-import fr.ntr.User;
+import fr.ntr.UserGroup;
 
 public class ProportionalFair extends Scheduler {
 
@@ -18,7 +18,7 @@ public class ProportionalFair extends Scheduler {
 		public void scheduling() {
 		}
 			
-		private void selectionUtilisateur(int Ts, int Sp, List<User> Users) {
+		private void selectionUtilisateur(int Ts, int Sp, List<UserGroup> Users) {
 			
 		}
 
diff --git a/src/main/java/fr/ntr/scheduler/RoundRobin.java b/src/main/java/fr/ntr/scheduler/RoundRobin.java
index 331661f..f181539 100644
--- a/src/main/java/fr/ntr/scheduler/RoundRobin.java
+++ b/src/main/java/fr/ntr/scheduler/RoundRobin.java
@@ -1,6 +1,6 @@
 package fr.ntr.scheduler;
 import java.util.List;
-import fr.ntr.User;
+import fr.ntr.UserGroup;
 
 
 public class RoundRobin extends Scheduler {
@@ -27,7 +27,7 @@ public class RoundRobin extends Scheduler {
 	 * Entry Time slot (int), Sous porteuse(int), and users ( List<User>)
 	 * Return the user in function of TS and SP selected
 	 */
-	private User UserSelection(int Ts, int Sp, List<User> Users) {
+	private UserGroup UserSelection(int Ts, int Sp, List<UserGroup> Users) {
 		for (int i = 0; i < Ts; i++) {
 			for (int j = 0; j < Sp; j++) {
 					index++;