The Application of Bandwidth Optimization Technique in SLA Negotiation Process

Abstract

In this paper we propose an efficient resource management technique for MPLS-based DiffServ networks. The service provider (SP) can predict sufficient bandwidth resources on the link for traffic caused by contracting of SLAs (service level agreement). It could be an important part of admission control in the SLA negotiation process (SLA-creation). Decisions of optimal capacity arrangements from network provider (NP) have to be done interactively and dynamically. It can significantly improve QoS end-to-end routing in the moment of service invocation. The problem of bandwidth optimization can be seen as an expansion problem of link capacities. Such explicit traffic engineering technique provides the possibility to intelligently tailor the route foe each SLA traffic flow such that different parts of the network remain equally loaded, can be done dynamically but such resource management approach has to be the result of all previous contracted SLAs, that are participating with definite bandwidth in the same time period. Such bandwidth optimization technique helps to avoid the creation of bottleneck links on the path and maintains high network resource utilization efficiency. The important difference from existing traffic routing techniques is that optimal path for SLA need not to be the shortest path solution as we have in e.g. OSPF protocol (often used for traffic routing in the moment of service invocation).