This happen randomly, not in any certain cells or BSCs. I heard that in Ecrisson, they findout that there’s some bad behavior mobiles keep sending RACH request that lead to SD Congestion. This is quite strange because this problem just often happen only at night (if there are these mobile, why don’t they send RACh Request in datetime?).
So if there are really the mobile like this, so what can we do to reduce the SD congestion in this situation?