Implementation of next generation VDSL networks in metro Ethernet backbone environments

Rapid expansion of cost-effective metropolitan Ethernet in regional backbone environments enables implementation of the FTTC-based next generation VDSL networks operating over the short-distance loop, which support faster speeds than the legacy ADSL networks. Most of the legacy ADSL networks have been implemented in ATM backbone environments, and the protocol architecture is mainly ´ATM over ADSL´. Implementation of VDSL networks in Ethernet backbone environments requires different approaches from the legacy ADSL network implementations in ATM backbone environments. In this paper, two different implementation methods for next generation VDSL networks in metropolitan Ethernet backbone environments are proposed, and a comparative analysis resulting from the experiences of real implementations and measurements presented. And, the migration path from the legacy ADSL networks to the next generation VDSL networks is also discussed.