Abstract
In the future Internet, Quality of Service (QoS) declared/required by various types of users should be guaranteed/provided. The routing decision is usually based only on the hop-counts on some source-destination path in the current Internet, so that congestion happens frequently at some bottle-neck links. It also occurs even if some control is done for provisioning QoS to each traffic/users. Thus, the routing decision should be based on QoS requirements from users as well as available bandwidth of links and utilization in routers, and Traffic Engineering (TE) is to utilize whole network resources effectively and to satisfy traffic oriented performance requirements. In this paper, we first examine QoS control mechanism such as IntServ and DIFF-SERV, and the relation it to TE. Next, we show the implementation schemes in the current Internet and by applying MPLS (Multi-protocol Label Switching). Furthermore, we introduce some papers that investigate and evaluate the performance of TE network and discuss some problems from an implementation point of view.
