Traffic Classification and Bandwidth Management in DiffServ-Aware Traffic Engineering Architectures

Abstract

NGN (Next Generation Network) architectures are constantly evolving towards solutions that allow the operator to provide QoS-guaranteed services in heterogeneous, multi-domain and multi-services networks. In this context, DiffServ-aware Traffic Engineering (DS-TE) is one of the most advanced technologies, which performs traffic engineering (TE) in a differentiated service environment by applying routing constrains with class granularity. This approach requires the definition of an efficient bandwidth constraint model to allocate the available link resources in a per Class Type (CT) basis, which influence both resource utilization and provided QoS. We analyze this problem and propose an algorithm to find the optimal mapping of service types into Class Types and the optimal bandwidth allocation for each of these. Herein, the optimality is expressed in terms of a cost function weighting both the expected satisfaction of the quality of service targets and the network resource utilization. The effectiveness of the proposed solution is analyzed considering a real context with expect near future combination of service requests from the end-users.

Multiobjective optimization of MPLS-IP networks with a variable neighborhood genetic algorithm

“…It is interesting to our approach once that it can be useful for the choice of requisitions sequence. Onali & Atzori (2008) describe an algorithm for finding an optimal mapping of the Type of Service in each type of class and an optimal allocation of bandwidth for each one of them. The optimality is expressed in terms of the cost function in order to obtain a level of Quality of Service and utilization of network resources.…”

Scheduling Algorithms in Packet Networks

“…2 Las tecnologías inmersas en el núcleo (core) de las redes (MPLS 37,47 y Carrier Ethernet) 38 ofrecen también mecanismos de calidad de servicio de acuerdo con sus procesos de funcionamiento.…”

Performance analysis of scheduling algorithms in Next Generation Networks

“…On the access networks side, such mechanisms have been proposed by different standardization organisms such as DSL Forum (Now Broadband Forum) [2] [3] and Cable Labs[1]1], according to their respective communications Architectures, DSL and HFC respectively. On the core network side, both MPLS ([4] [5]and [6]) and Carrier Ethernet ( [7]), offers QoS mechanisms according to their specific architecture. Besides the inherent behavior of access technology and core technology, network devices must be configured according to manufacturer recommendations, in order to provide an adequate operation of the entire network ([8] [9][10] [11]).…”