1+1 protection" represents one of the latest methods in MPLS networks. Such method is available for premium customers and consists in traffic duplication by two different paths, in order to prevent informational link from failure. In this article, is presented the influence of this mechanism on the quality of service (QoS). The metrics which we refer are the average and standard deviation of transfer delay of one MPLS network flow. We considered that the delays in those two LSPs (Label Switched Path) paths are jointly distributed with normal random variables with a certain degree of correlations and a certain ratio between the path's delay averages, respective standard deviations.

No abstract

No abstract

Multimedia communication services over multidomain heterogeneous network infrastructure need end to end (E2E) guarantees for quality of services (QoS).In this context, the proper network dimensioning and traffic engineering of each network domain are significantly dependent on the accuracy of the of traffic demand estimation. The aim of this paper is to propose an algorithm, which estimates the future traffic demand based on current subscriptions, traffic projections and historical data provided by network monitoring. This algorithm is currently evaluated and implemented in the framework of the FP6 European research project named ENTHRONE II 1 .