Coexistence of G.fast and VDSL in FTTDP and FTTC deployments

Hybrid copper/fiber networks bridge the gap between the fiber link and the customer by using copper wires over the last meters. This solution combines energy efficiency and low cost of the copper network with higher fiber data rates. ITU recently finished the G.fast standard for high speed data transmission on copper wires for this application. Coexistence with legacy VDSL2 systems is an important topic for the introduction of the new technology, as the systems share a significant part of the frequency spectrum. This paper investigates the performance of G.fast coexisting with VDSL2. Methods for decentralized spectrum optimization and protection of legacy services are presented.