Enhancing NGN's versatility for Multi-Service support: The Bridging Virtualization approach
ABSTRACT Since the appearance of next generation networks (NGN), access and aggregation networks (even core networks) have suffered significant improvements and architectural evolutions. The idea of network convergence, something in which providers are very interested, is closely related with these deployments, as the same network must be capable of transporting all the existent telecommunication services (voice, video and data). This paper introduces an architectural model which is based on broadband forum technical recommendations for multi-service (TR-058), and makes use bridging technology in all the nodes. In this model, carrier-class Ethernet has been selected as transport technology in order to achieve convergence in provider networks. Then, a radically new approach for network convergence is presented, bridging virtualization. This approach introduces the concept of instances to differentiate service requests. Finally, a secure alternative to the instantiation of multiple services is presented (EAPOL-in-EAPOL).
- SourceAvailable from: ieee802.org
Article: Provider link state bridging[show abstract] [hide abstract]
ABSTRACT: Wide area communications technology has been challenged to virtualize large numbers of Ethernet LAN segments. This is a consequence of a mismatch between the broadcast nature of the LAN segment and the extremely constrained connectivity implied by the p2p connections or tunnels available in the WAN environment, which have been combined to create virtual LAN segments. PBB-TE has been a practical demonstration of how filtering applied to a broadcast media can result in a connection. This article introduces provider link state bridging (PLSB), which adds a control plane to the PBB data plane in order to extend the techniques for manipulation of Ethernet bridges for unicast paths pioneered by PBB-TE. PLSB solves the problem of largescale virtualization of LAN segments over an Ethernet infrastructure by applying advances in computation performance to the multicast capabilities inherent in the Ethernet data plane. The result is that the fundamental primitives of connectivity today, the broadcast LAN segment and the connection, can be virtualized in a scalable manner on a common (but substantially larger and better utilized) Ethernet-based infrastructure.IEEE Communications Magazine 10/2008; · 3.66 Impact Factor
Article: Why ethernet WAN transport?[show abstract] [hide abstract]
ABSTRACT: The ubiquitous and plug-and-play characteristics of Ethernet provide a unique opportunity for service providers to-offer a variety of innovative and affordable application-centric services, resulting in a much broader networking culture. Before that can really happen, Ethernet has to overcome some challenging obstacles and prove efficient support of SLAs, at least similar to that offered by traditional layer 2 WAN technologies. In this article we describe some of the most commonly used WAN transport technologies. We compare Ethernet WAN transport to these traditional WAN technologies. We discuss QoS, CAM, security, and resilience issues. Pros and cons of Ethernet WAN transport are also enumerated.IEEE Communications Magazine 12/2005; · 3.66 Impact Factor