Chapter 9 - Case studies 2: Traffic Engineering and QoS Optimization for Operational Integrated Voice/Data Dynamic Routing Networks

Abstract

This chapter presents a case study of multiprotocol label switching/ general multiprotocol label switching (MPLS/GMPLS)-based integrated voice/data dynamic routing networks. It develops a 71-node national network model and multiservice traffic demand model for the traffic engineering and quality of service optimization (TQO) protocol design in an MPLS/GMPLS-based integrated voice/data dynamic routing network. Discrete event simulation models are used to illustrate the design and optimization of this large-scale, state-dependent TQO protocol, which allows the integration of a number of voice and data virtual networks (VNETs), called DiffServ-aware MPLS TE (DSTE) class types (CTs) in this technology, on an integrated shared packet network, with sophisticated bandwidth allocation/management capabilities. The routing and capacity designs for the meshed logical topologies are optimized by using the discrete event flow optimization (DEFO) algorithm, while the routing and capacity designs for the sparse logical topologies are optimized by using the shortest path optimization and DEFO algorithms presented. A 5 CT traffic model is developed and three levels of traffic priority—high, normal, and best-effort—are designated for each CT. The chapter first illustrates the selection of an event-dependent-routing (EDR)-based path selection protocol from among a large set of candidates. five options are defined for the TQO bandwidth management protocol, which are compared in the case study.