Quality-of-Service Class Specific Traffic Matrices in IP/MPLS

Overview

This paper considers the problem of determining traffic matrices for end-to-end demands in an IP/MPLS network that supports multiple Quality of Service (QoS) classes. More precisely, the paper wants to determine the set of traffic matrices Ti for each QoS class i separately. Ti contains average bandwidth levels for QoS class i for every pair of routers within the network. The paper proposes a new method for obtaining QoS class specific traffic matrices that combines estimation and measurement methods: The paper takes advantage of the fact that the total traffic matrix can be measured precisely in MPLS networks using either the LDP or RSVP-TE protocol.