Integrating and managing converged multiservice networks
N. Shah, Sukant K. Mohapatra · Bell Labs Technical Journal · 2005
Balancing the conflicting practices of the “one service-one technology” and “one technology for all services” paradigms is a significant challenge. In response to this challenge, the telecommunications industry is shifting to a converged network paradigm based on Multiprotocol Label Switching (MPLS). MPLS can support multiple services over one infrastructure, thereby increasing flexibility and providing economies of scale. This paper examines two generic approaches to building a converged MPLS core. Based on our assessment of the advantages and challenges associated with these two approaches, we propose that carriers implement a distributed architecture to migrate to MPLS and scale existing layer 2 services. This paper discusses the technical merits of this architecture, which include high scalability, investment protection, multivendor interoperability, and rapid service introduction. It also describes how carriers can preserve quality of service (QoS) and service level agreements (SLAs) through the MPLS core. Finally, it describes a service-centric network management model that makes use of existing operation systems.