Friendly Full Duplex: A Multi-User Full Duplex Method for MGfast in Coexistence with G.fast

Multi-user full duplex (FDX) transmission is instrumental to provide sufficient coverage and reach for the multi-gigabit data rates targeted by MGfast. However, to seamlessly introduce such a technology into access networks, it is important to consider coexistence with legacy half duplex G.fast. We propose a novel frame structure with two alternating FDX operating points, as well as a corresponding synchronization scheme, which enable coexistence without impacting the rate nor the reach of either technology. This multi-user FDX method is referred to as Friendly Full Duplex, and is a low complexity solution that exploits existing G.fast mechanisms and that can be optimized over transmission direction and time. Simulation results illustrate the significant gains in data rate performance and coexistence properties.

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