S. Recker, W. Geisselhardt, and I. Wolff (Germany)
Traffic Engineering, MPLS, Routing, UMTS, QoS
Traffic Engineering and especially routing according to traffic engineering constraints is widely accepted as a means to increase network efficiency. Various traffic engineering approaches either using the per packet routing of OSPF or the per flow routing of MPLS have been evaluated in different environments. Due to the diver gence of the reported results it seems that the trade-off of efficient use of network resources for increased operational complexity can only be assessed in the context of a particular environment. In addition to resource efficiency the support of appropriate QoS provision will play an important role in future networks. Although this has been taken into account in extensions to per packet and per flow routing protocols, not much attention has been given to the evaluation of traffic engineered routing with respect to QoS. Our work aims at investigating the potential of traffic engineering and especially traffic engineered routing in the particular environment of Mobile Data Networks. We compare the per packet and per flow derivates of a simplistic traffic engineered routing approach that deploys static and load dependent link weight assignment and minimum weight computed routes. We demonstrate that already this rather simple routing approach is capable to increase the efficient utilization of the entire network. Additionally we show that in case of per flow routing also the end-to-end non best-effort QoS provided to different classes of traffic can be improved.
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