In these cases a useful solution is [Dave]’s self-contained LoRa repeater. The repeater hardware is simple, and [Dave] says that if one has the parts on hand, it can be built in about an hour.

This configuration is especially suitable for scalable applications in large-scale quantum networks Schematic of the semihierarchical quantum repeater architecture. (a) Both ends of each elementary ...

This work is detailed in the publication titled "Quantum repeater architecture with hierarchically optimized memory buffer times" in the March issue of the journal Quantum Science and Technology ...