The race toward the sixth generation (6G) of mobile communications is accelerating as researchers make strides with innovative technologies. A recent study presents the first successful implementation of a radio- and power-over-fiber (RPoF) system utilizing double-clad fiber (DCF), which allows the simultaneous transmission of data and power, setting new benchmarks for future wireless connectivity.
This groundbreaking system transmits broadband 26-GHz 5G New Radio (NR) signals alongside 20 watts of optical power through 250 meters of DCF. The research, conducted by a team from Brazilian institutions, achieves significant reach enhancements—150% more than existing fourth and fifth-generation systems, which are often limited by conventional power-over-Ethernet interfaces.
The study outlines the mounting pressure on mobile networks for superior data transmission capabilities, energy efficiency, and connectivity, highlighting the key performance indicators (KPIs) anticipated for 6G, including ultra-high data rates of up to 1 Tbit/s and massive device connectivity.
Through advanced experimental setups, the RPoF system utilizes DCF to effectively manage both data and power delivery. This dual capability not only promises efficiency and reliability but indicates the potential for enhanced network architectures. "Our PoF system was able to power components... without impacting the data transmission quality," stated the researchers, confirming the dual role of the system.
One of the most notable findings is the compliance of the RPoF system with industry standards. Using metrics such as the root mean square error vector magnitude (EVMRMS), the research showcases stability and efficiency over extended periods and confirms its readiness for integration with future mobile networks.
This innovative approach, integrating optical power delivery with data transmission, demonstrates the promise of DCF technology for 6G. The researchers have introduced technologies such as analog radio-over-fiber (A-RoF) and mm-wave transmission as complementary frameworks, allowing for increased bandwidth and improved network energy efficiency.
Overall, the study's findings reflect extensive efforts to push the boundaries of mobile communication technologies. It affirms the feasibility of employing DCF-based solutions to empower next-generation networks. While the achieved throughput of 1.6 Gbps currently falls short of the ambitious KPIs for 6G, the authors believe future advances can facilitate higher data rates, setting the groundwork for continued exploration and optimization.
The research also points to the importance of developing advanced power-over-fiber technologies to address distribution challenges, particularly as networks scale and evolve. With networks anticipated to house near 100 million devices per square kilometer, the demand for enhanced power delivery methods is imperative.
This significant advancement sets the stage for more reliable, scalable, and energy-efficient solutions for 6G, marking another step toward the realization of ultraconnected experiences. The team envisions prospects for extending power levels, improving efficiencies, and even broader applications of their methods to the burgeoning field of telecommunications.