Combination and access of quantum communication and 5G network

Quantum secure direct communication (QSDC), a vital branch of quantum communication, enables reliable, secure transmission under harsh conditions of high channel noise, large optical loss and stringent security constraints. Having undergone field trials and practical deployment, QSDC serves as a promising candidate for confidential transmission in ultra-high-security scenarios. Modern society relies heavily on ubiquitous communication, and 5G mobile networks have achieved rapid development and widespread commercialization in recent years, driving growing demands for robust 5G security. This paper proposes a QSDC-5G integrated secure transmission architecture to safeguard 5G data delivery. The solution maintains full compatibility with legacy classical networks while satisfying long-term security requirements for future communications. Laboratory simulation and stability tests were conducted on the proposed converged security network. Continuous 24-hour measurements demonstrate that the integrated network achieves an interface throughput of 12 kbps with a round-trip latency below 3500 ms. These key metrics satisfy the signaling transmission demands for single mobile terminal authentication when accessing private networks via base stations, laying a solid foundation for deep integration of QSDC into 5G systems.