diff --git a/build.gradle b/build.gradle
index 4b8b89a..e154be0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,7 @@ plugins {
 }
 
 run {
-    args = ["10000", "20"]
+    args = ["10000", "40"]
 }
 
 application {
diff --git a/src/main/java/fr/ntr/AccessPoint.java b/src/main/java/fr/ntr/AccessPoint.java
index e752838..edd06d7 100644
--- a/src/main/java/fr/ntr/AccessPoint.java
+++ b/src/main/java/fr/ntr/AccessPoint.java
@@ -24,11 +24,10 @@ public class AccessPoint {
 
             cell1.updateBandwidth(ticks);
             cell2.updateBandwidth(ticks);
-            for(int ts = 0; ts < 2; ts++) {
-                for (int sp = 0; sp < 100; sp++) {
-                    cell1.preScheduling();
-                    cell2.preScheduling();
-
+            cell1.preScheduling();
+            cell2.preScheduling();
+            for(int ts = 0; ts < Cell.getTimeSlotNb(); ts++) {
+                for (int sp = 0; sp < Cell.getSubCarrierNb(); sp++) {
                     User user1 = cell1.schedule(ticks, ts, sp);
                     User user2 = cell2.schedule(ticks, ts, sp);
                     if(user1 == user2 && user1 != null) {
diff --git a/src/main/java/fr/ntr/Cell.java b/src/main/java/fr/ntr/Cell.java
index 30c3673..9ba7bb8 100644
--- a/src/main/java/fr/ntr/Cell.java
+++ b/src/main/java/fr/ntr/Cell.java
@@ -76,18 +76,19 @@ public class Cell {
     public void consumeResource(int tick, int ts, int sp) {
         ResourceBlock rb = frame[ts][sp];
         User user = rb.getUser();
-        Packets p = user.getPacketsToSend().get(user.getPacketsToSend().size()-1);
-        p.decreaseBitsNumberRemaining((int) user.getBandwidthTable()[ts][sp]);
-        if(p.getBitsNumberRemaining() <= 0) {
-            if(tick == 0){
-                p.setDurationSending(1);
-            }else {
-                p.setDurationSending(tick);
+        if(user != null && !user.getPacketsToSend().isEmpty()) {
+            Packets p = user.getPacketsToSend().get(0);
+            p.decreaseBitsNumberRemaining((int) rb.getBandwidth());
+            if(p.getBitsNumberRemaining() <= 0) {
+                if(tick == 0){
+                    p.setDurationSending(1);
+                }else {
+                    p.setDurationSending(tick);
+                }
+                user.getPacketsSent().add(p);
+                user.getPacketsToSend().remove(p);
             }
-            user.getPacketsSent().add(p);
-            user.getPacketsToSend().remove(p);
         }
-
     }
 
     public void analyseData(int tick) throws IOException {
diff --git a/src/main/java/fr/ntr/Main.java b/src/main/java/fr/ntr/Main.java
index aa66e12..1f615c1 100644
--- a/src/main/java/fr/ntr/Main.java
+++ b/src/main/java/fr/ntr/Main.java
@@ -110,7 +110,8 @@ public class Main {
                     System.exit(1);
                 }
             }
-        executor.close();
+            executor.close();
+            System.out.println("Executor closed");
         }
         else {
             System.err.println("Please give launch arguments");
diff --git a/src/main/java/fr/ntr/scheduler/RoundRobin.java b/src/main/java/fr/ntr/scheduler/RoundRobin.java
index 20bca04..f553fc4 100644
--- a/src/main/java/fr/ntr/scheduler/RoundRobin.java
+++ b/src/main/java/fr/ntr/scheduler/RoundRobin.java
@@ -25,7 +25,6 @@ public class RoundRobin extends Scheduler {
 	 */
 	@Override
 	public User scheduling(int ticks, int ts, int sp) {
-
 		if(userCopy.isEmpty()) {
 			return null;
 		}
@@ -36,7 +35,7 @@ public class RoundRobin extends Scheduler {
 
 	@Override
 	public void postScheduling(User userSelected) {
-		if(!userSelected.getPacketsToSend().isEmpty())
+		if(userSelected != null && !userSelected.getPacketsToSend().isEmpty())
 			userCopy.add(userSelected);
 	}
 
diff --git a/src/main/java/fr/ntr/scheduler/Scheduler.java b/src/main/java/fr/ntr/scheduler/Scheduler.java
index 78376a4..3d30a88 100644
--- a/src/main/java/fr/ntr/scheduler/Scheduler.java
+++ b/src/main/java/fr/ntr/scheduler/Scheduler.java
@@ -21,17 +21,6 @@ public abstract class Scheduler {
 
 	public void allocateRessource(User userMax, int ts, int sp, int ticks) {
 		if (userMax != null && !userMax.getPacketsToSend().isEmpty()) {
-			/* Packets p = userMax.getPacketsToSend().get(userMax.getPacketsToSend().size()-1);
-			p.decreaseBitsNumberRemaining((int) userMax.getBandwidthTable()[ts][sp]);
-			if(p.getBitsNumberRemaining() <= 0) {
-				if(ticks == 0){
-					p.setDurationSending(1);
-				}else {
-					p.setDurationSending(ticks);
-				}
-				userMax.getPacketsSent().add(p);
-				userMax.getPacketsToSend().remove(p);
-			} */
 			myFrame[ts][sp].setUser(userMax);
 			myFrame[ts][sp].setBandwidth(userMax.getBandwidthTable()[ts][sp]);
 		}