Summary

[ITU-T Y.Supp.98] identifies technical considerations for quantum networks, including relevant components and their configurations. It also introduces potential migration scenarios from Quantum Key Distribution Network (QKDN) towards quantum network (QN). Furthermore, it outlines a standardization roadmap within ITU-T.  Especially, standardization implications on a layered model of Quantum Network. 

There are a number of new capabilities introduced to support QN routing such as virtual and opportunistic hybrid path computation, fidelity purification mechanisms, and swapping mechanisms, etc.  It is essential to extend the existing IP network routing taxonomy to enable QN routing and specify them in standardized manner.

Furthermore, optimal control and management of the newly introduced QN capabilities in the QN architecture are additional critical aspects to be considered for the standardization.

Therefore, this Supplement introduces different approaches of the layered models and other architectures of QN, functional elements involved, addressing, forwarding and routing mechanisms, QN routing taxonomy, and control and management mechanisms. Lastly, it recommends standardization implications from the perspective of the QN architecture.