diff --git a/src/main/java/fr/ntr/AccessPoint.java b/src/main/java/fr/ntr/AccessPoint.java
index 6548c5c..aa98c6d 100644
--- a/src/main/java/fr/ntr/AccessPoint.java
+++ b/src/main/java/fr/ntr/AccessPoint.java
@@ -77,18 +77,22 @@ public class AccessPoint {
                 //interférences si les deux cellules parlent au même UE sur le même time slot
                 User user1 = frameCell1[k][l].getUser();
                 User user2 = frameCell2[k][l].getUser();
-                if (user1 == user2) {
+                if (user1 == user2 && (user1 != null || user2 != null)) {
                     double bandwidth1 = frameCell1[k][l].getBandwidth();
                     double bandwidth2 = frameCell2[k][l].getBandwidth();
                     //User proche
                     if (user1.getDistance() < 200d) {
                         frameCell1[k][l].getUser().getBandwidthTable()[k][l] = bandwidth1 / 2;
                         frameCell2[k][l].getUser().getBandwidthTable()[k][l] = bandwidth2 / 2;
+                        //System.out.println("Interference Cell1 /2 ="+frameCell1[k][l].getUser().getBandwidthTable()[k][l]);
+                        //System.out.println("Interference Cell2 /2 ="+frameCell2[k][l].getUser().getBandwidthTable()[k][l]);
                     }
                     //User loin
                     else {
                         frameCell1[k][l].getUser().getBandwidthTable()[k][l] = bandwidth1 / 4;
                         frameCell2[k][l].getUser().getBandwidthTable()[k][l] = bandwidth2 / 4;
+                        //System.out.println("Interference Cell1 /4 ="+frameCell1[k][l].getUser().getBandwidthTable()[k][l]);
+                        //System.out.println("Interference Cell2 /4 ="+frameCell2[k][l].getUser().getBandwidthTable()[k][l]);
                     }
                 }
             }