Summary - Y.3829 (08/2025) - Quantum key distribution networks interworking – Functional architecture for quality-of-service assurance

The quantum key distribution network (QKDN) is able to cover a wide area by interworking multiple QKDNs. This is called QKDN interworking (QKDNi). One of the challenges of the QKDNi is to assure network interworking performance and that different quality of service (QoS)/quality of experience (QoE) requirements of different interworking application scenarios are met.
The requirements of QoS assurance for QKDNi specified in Recommendation ITU-T Y.3817 address these challenges. Based on the requirements, Recommendation ITU-T Y.3829 specifies the functional architecture, associated functional entities and reference points and a basic operational procedure.