SLA CREATION IN RELATION TO RESOURCE MANAGEMENT

Srećko Krile - Slavko Šarić

   While DiffServ architecture solves the scalability problem of QoS provisioning, it fails to be the solution for end-to-end provisioning. A combination of IntServ/RSVP signaling with aggregate traffic handling mechanisms could solve such deficiencies. To obtain quantitative end-to-end guarantees in DiffServ architecture, based on traffic handling mechanisms with aggregate flows, some kind of congestion control through negotiation process (in new SLA creation) is necessary. In this paper an efficient heuristic algorithm for end-to-end congestion control for N quality-of-service levels (service classes) is being developed. The problem is seen as an expansion problem of link capacities in given limits from a common source. QoS routing is in firm correlation with resource reservation process (resource management). If the optimal expansion sequence has any expansion value that exceeds allowed limits (link capacity) a new SLA cannot be accepted or must be redefined.

Keywords: quality of service in DiffServ networks, constrained-based path selection, end-to-end QoS routing, SLA creation, traffic handling mechanisms

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