**7. Conclusions**

In this chapter, the technologies to realize multipoint-interconnected quantum communication networks are summarized. Quantum communication enabling technologies including point-to-point QKD technologies and QT technologies are the basis to construct multipoint-interconnected quantum communication networks. As two typical quantum communication networks, quantum key distribution network (QKDN) and QT network are introduced respectively. In order to interconnect multiple points in QKDN, four sub-problems (i.e., architecture of QKDN, key supply in QKDN, resilience of QKDN, and machine learning in QKDN) are addressed. The architecture in QKDN consists of four planes: application (app) plane, control plane, QKD plane, and data plane, in top-down order. Key supply in QKDN needs a reasonable quantum key pooling mechanism and a balanced key resource scheduling strategy. Resilience of QKDN includes three methods to recover the failure-affected key provisioning services in different degrees. In order to interconnect multiple points in QT network, the existed research mainly pays attention on point-to-point QT mechanism and multi-hop QT networking mechanism, only few works have studied entanglement distribution from the multipoint interconnection of QT networks. Some open issues in quantum communication networks are also discussed, such as connectivity of quantum communication networks and how to plan quantum communication networks collaboratively.

*Multipoint-Interconnected Quantum Communication Networks DOI: http://dx.doi.org/10.5772/intechopen.101447*
