With the emergence of smart devices and the Internet of Things (IoT), 5G has been developed to meet the growing demand for transmission speeds and bandwidth. 5G overcomes the limitations of previous generations of technology, offering significant improvements in speed, latency, and stability. However, with the advancement of computational capabilities and the advent of quantum computers, security issues have become a pressing concern. Current technologies in 5G fronthaul rely on intrinsic security technologies, which are difficult to defend against quantum computer-based attacks. Consequently, this paper proposes a future mobile fronthaul architecture, such as 6G, which builds upon the 5G fronthaul network architecture while introducing quantum communication based on the BB84 protocol. This architecture enhances privacy protection and improves resistance to eavesdropping while maintaining the original performance. Additionally, the paper models the architecture to explore its noise resistance, using forward and backward spontaneous Raman scattering power as indicators, and demonstrates the system's feasibility under the influence of high-power 6G signals. The potential applications of this architecture are also examined. The results indicate that the quantum-secure 6G fronthaul network represents a significant breakthrough. It not only meets the stringent security requirements of modern communication but also enables a wide range of applications, paving the way for a safer and more interconnected digital future.
With the emergence of smart devices and the Internet of Things (IoT), 5G has been developed to meet the growing demand for transmission speeds and bandwidth. 5G overcomes the limitations of previous generations of technology, offering significant improvements in speed, latency, and stability. However, with the advancement of computational capabilities and the advent of quantum computers, security issues have become a pressing concern. Current technologies in 5G fronthaul rely on intrinsic security technologies, which are difficult to defend against quantum computer-based attacks. Consequently, this paper proposes a future mobile fronthaul architecture, such as 6G, which builds upon the 5G fronthaul network architecture while introducing quantum communication based on the BB84 protocol. This architecture enhances privacy protection and improves resistance to eavesdropping while maintaining the original performance. Additionally, the paper models the architecture to explore its noise resistance, using forward and backward spontaneous Raman scattering power as indicators, and demonstrates the system's feasibility under the influence of high-power 6G signals. The potential applications of this architecture are also examined. The results indicate that the quantum-secure 6G fronthaul network represents a significant breakthrough. It not only meets the stringent security requirements of modern communication but also enables a wide range of applications, paving the way for a safer and more interconnected digital future.
The transition from 5G to 6G networks introduces significant advancements in speed, latency, and connectivity, but also raises critical security concerns. The increasing number of devices that need to be plugged into the network makes the demand for enhanced security and efficiency paramount. This paper proposes a novel Quantum-Encrypted 6G Fronthaul Network Architecture, integrating quantum communication with passive wavelength division multiplexing technology to address the security challenges in next-generation networks. The architecture ensures theoretically unbreakable encryption by utilizing quantum key distribution techniques on top of the current passive WDM fronthaul network architecture. It reduces the difficulty and cost of network upgrades while maintaining high bandwidth utilization and scalability. By deploying quantum communication devices in Active Antenna Units and Distributed Units, the proposed system enhances the security of the fronthaul link, protecting against eavesdropping and cyber attacks. The results obtained through simulation demonstrate that the system is highly resistant to dark counts, detection efficiency, and photon pulse variations, ensuring reliable key distribution over long distances. This architecture not only provides a cost-effective upgrade path for existing 5G networks but also paves the way for secure, high-capacity communication in future 6G applications, such as autonomous systems, smart cities, and critical infrastructure.
In the digital age, 5G technology has significantly enhanced global communication capabilities, providing strong support for various industries. However, 5G falls short of achieving comprehensive intelligence within the Internet of Things (IoT), propelling the development of 6G technology. 6G is expected to further enhance network performance by integrating advanced technologies such as AI and quantum communication, while expanding application scenarios to include communication in extreme environments for comprehensive global connectivity. This paper proposes an innovative fronthaul architecture that applies Quantum Key Distribution (QKD) technology to the 5G fronthaul, leveraging its unconditionally secure key generation and distribution mechanism. In this design, costlier Alice devices are placed on the AAU side, while less expensive Bob devices are positioned on the DU side, optimizing deployment to reduce engineering costs and lower deployment barriers. The feasibility of this architecture is demonstrated by calculating the secure key rate. Comparative analysis with existing research is performed to clarify future research directions. These innovations not only enhance 5G network security but also offer new solutions for the security requirements of 6G networks, such as data security, network resilience, and algorithm transparency. Our research offers strategic value for future network security, laying the groundwork for reliable networks.
The advancement of 6G networks demands high-capacity, ultra-low latency, and secure communication infrastructure. Traditional fronthaul solutions face significant challenges in meeting these demands due to increasing data traffic, network densification, and security vulnerabilities. To address these issues, this paper proposes an innovative 6G passive Wavelength Division Multiplexing (WDM) fronthaul architecture integrated with Quantum Key Distribution (QKD). By leveraging quantum cryptographic principles, our approach ensures unbreakable security and protects network transmissions from potential cyber threats and eavesdropping attacks. The proposed architecture effectively combines high-speed optical transmission with quantum-secured key exchange, optimizing network reliability and reducing security risks. Through comprehensive simulations, we evaluate key performance factors, including secure key rate (SKR), quantum bit error rate (QBER), detector efficiency, and quantum transmission loss. Results indicate that our architecture maintains high SKR with minimal QBER, even under challenging transmission conditions, ensuring robust quantum-secured communication. Additionally, the passive nature of WDM significantly reduces power consumption and maintenance costs, improving network sustainability. This research establishes a practical pathway for integrating quantum security into next-generation optical fronthaul networks, enabling highly secure, scalable, and efficient data transmission for future 6G applications, including autonomous vehicles, smart cities, and industrial IoT.
The rapid evolution of mobile communication technology from 5G to 6G brings great opportunities but also poses serious security and privacy challenges. Although 6G networks offer advantages such as ultra-low latency, extremely high data rates, and massive connectivity, their decentralized, AI-driven, and highly virtualized architecture makes them more vulnerable to cyber-attacks. Traditional encryption methods are increasingly incapable of defending against emerging attacks. To address this issue, this paper proposes an innovative quantum-secured passive WDM fronthaul architecture that integrates BB84-based Quantum Key Distribution (QKD) with existing WDM fiber communication technology, balancing high security with feasibility. The architecture adopts an asymmetric design: low-cost quantum transmitters are deployed at distributed AAU sites, while high-performance quantum receivers are centrally installed at DU sites. This significantly reduces hardware costs and simplifies large-scale deployment. In addition, a centralized Key Management Center (KMC) is introduced to enable dynamic key distribution and real-time updates, further enhancing the system’s security and operational efficiency. Simulation results show that under a fiber attenuation of 0.20 dB/km and a detection efficiency of 10%, the system can maintain a relatively high secure key rate and an acceptable quantum bit error rate (QBER) over a transmission distance of 170 km. Furthermore, by optimizing key parameters such as detection efficiency, fiber attenuation coefficient, and the average photon number per pulse, the system’s key generation rate and secure transmission distance can be further improved.
Amidst the development of communication technologies, the limitations of 5G communication systems, particularly in security and resource management, have become increasingly apparent. As the 6G era approaches, there are growing demands for integrated systems that ensure robust security and optimize resource utilization. To address these challenges, this paper proposes a novel architecture that integrates classical communication channels and quantum key distribution (QKD) channels using wavelength-division multiplexing (WDM). This innovative approach allows classical and quantum channels to coexist within a single optical fiber, improving security and fiber utilization while reducing system complexity and cost. A key contribution of this work is introducing an AI-based prediction and management module, dynamically adjusting the quantum key generation rate according to real-time usage and forecasted demand. By leveraging machine learning, the module predicts quantum key consumption patterns, ensuring that the key generation rate aligns with the system’s security and performance requirements. This approach balances key generation and usage, minimizing resource waste and enhancing the system’s overall efficiency. The feasibility of the proposed architecture is validated through an analysis of spontaneous Raman scattering (SpRS), showing the architecture maintains high key generation rates and low quantum bit error rates (QBER) under optimal system conditions. Furthermore, an analysis reveals that the AI module meets the requirement of predicting key usage and managing the key generation rate. Lastly, the feasibility is further validated by an experiment. Overall, this study presents a comprehensive framework for integrating classical and quantum channels in future 6G networks, providing enhanced security, efficiency, and scalability.
5G is the new generation of mobile communication that is taking over the 3G and 4G generations. As our generation has expanded and continues to work faster and more adapt to the electronics of today, we are faced with the ever-improving technologies to keep us moving forward. 5G has the possibility of faster upload and download speeds. The possibility of more and improved smart products to advance our lives, from autonomous cars, smart traffic lights, improved city Wi-Fi availability, and gaming improvements with no lag time, just to name a few. It is expected that 5G/6G will make it wide open for new frequency ranges which will result in many connections and huge data transfer maintaining high network efficiency. With 6G on the horizon, Quantum Computing and networking are playing a key role. We anticipate that Quantum Information Technologies will enable and support future 6G systems in both communication and computing. Quantum computing networks boast a few potential security and performance advantages compared to incumbent network technology. The security and energy efficiency of quantum networks is superior to present solutions because quantum networks can theoretically work with single photons whose quantum states remain undisclosed in transmission from origin to destination. Quantum computing networks and associated technology may begin to be implemented in 5G networks and could become fully implemented with the advent of 6G networking technology. In this work, we are focusing on the security risks that can be involved with the new 5G and their proposed solutions. We will study the role of Quantum Key Distribution as leverage to improve 6G security.