Service Virtualization for Border Model Based Multi-Layer Service Network Architecture

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The rapidly increasing bandwidth requirements of IP traffic mean that networks based on optical technologies in conjunction with IP routing technologies will provide the backbone of the next generation Internet. One of the major issues is how to construct an optical-technology-based backbone network that offers the economical transport of large-scale IP/MPLS services while achieving reliable, robust network. The key to achieving this objective lies in multilayer coordination technologies using Multi-Layer Service Network [MLSN] Architecture, that we previously proposed [2]. One of the important aspects of MLSN architecture is ability to effectively use GMPLS network resources by IP/MPLS networks. We propose extensions to previously proposed MLSN architecture. The proposed extensions to MLSN architecture are tailored to address service virtualization and of various networks over GMPLS backbone. As a part of this extended MLSN architecture, we introduce novel concepts known as Logical Router (LR) and Virtual Router (VR) that would enable border router to be services domain router, so that it can connect multiple networks such as L2VPN, L3VPN etc., over GMPLS backbone by offering separation or virtualization. This separation/isolation greatly enhances the reliability of next generation networks, as any failure on one should be isolated from others. We evaluate our extended network architecture against requirements for the large scale network targeting at introducing such new technology to cope with vast traffic explosion and challenges in operation and provision sophistication.