The phenomenon of traffic burstiness is a big challenge in the switching equipments of the core of computer network, because it leads to more delay and jitter to be tolerated by users. Therefore, we should use all of the available facilities to improve the traffic behavior. In this paper, we present an idea based on delay management and QoS considerations to decrease the variances in short-time scales. Using our approach the impact of short-term burstiness will be decreased. Also, this idea can be implemented in MPLS ingress nodes or by delay management of paths in MPLS traffic engineering when we have congestion in the network.