Analog Repeaters: A New Frontier in 5G and 6G mmWave Deployment

As demand grows for lightning-fast, high-capacity mobile communication, the telecommunications sector is adopting cutting-edge solutions to enhance network performance. Utilizing millimeter-wave (mmWave) frequencies in 5G and the anticipated 6G networks appears promising for offering low-latency, high-speed connectivity. Nevertheless, implementing mmWave frequencies has intrinsic challenges, chiefly their vulnerability to obstructions such as buildings, trees, and even humans. Recent research by the Institute of Science Tokyo indicates that analog repeaters could be key, aiding practical mmWave deployment.

Enhancing mmWave Coverage with Analog Repeaters

Field experiments conducted at the Institute of Science Tokyo’s Ookayama Campus showed that low-cost analog repeaters dramatically improve mmWave signal coverage. These repeaters can be linked wirelessly or via optical fibers, providing a flexible solution for network deployment. Impressively, both setups attained over 1 Gbps throughput and increased signal stability, making them suitable for urban and densely populated areas with connectivity issues.

Analog repeaters help resolve the signal blockage problem that has traditionally limited mmWave technology. These devices work by using a donor unit to receive signals and a service unit to amplify and transmit those signals to end-users or other repeaters. By strategically placing these repeaters, networks can uphold high-speed connectivity even in non-line-of-sight (NLOS) scenarios.

Key Findings and Practical Applications

The research highlights that strategically incorporating analog repeaters within a network can overcome the challenges associated with mmWave’s natural characteristics. Both optical fiber-connected and fully wireless multi-hop repeater systems were analyzed, with the latter achieving more stable results despite slightly reduced throughput compared to fiber-linked setups. For locales where individual base stations might not suffice, these repeaters offer an effective solution, transforming previously unreachable spots into high-connectivity zones.

The study also found that overlapping the coverage areas of several repeaters generates artificial multipath environments, which stabilize signals and enhance overall network performance. This is especially beneficial in scenarios where signals face obstructions, as multiple repeater inputs help maintain strength and throughput.

Conclusion and Future Implications

Deploying analog repeaters signifies a groundbreaking step toward making mmWave frequency usage more common in modern mobile communications. By tackling core issues such as signal blockage and limited coverage, these repeaters pave the way for sturdier and more consistent 5G and forthcoming 6G networks. As Professor Kei Sakaguchi commented, this innovation marks the beginning of revolutionary efforts to advance mobile communications beyond their current capabilities.

Key Takeaways

• Analog repeaters significantly enhance mmWave signal coverage, aiding in overcoming traditional blocking issues.
• Testing demonstrated over 1 Gbps throughput and improved signal stability in both wireless and fiber-linked configurations.
• These solutions offer practical applications in urban and high-traffic settings, facilitating broader 5G and 6G network deployment.
• The study points to a promising future for mmWave technology, supporting robust and extensive mobile communication capabilities.

As advancements in telecommunications continue, the incorporation of analog repeaters into network frameworks marks an essential move toward achieving seamless, high-capacity connectivity for the future of mobile communications.