KEYWORDS: Signal to noise ratio, Modulation, Frequency modulation, Analog electronics, Angle modulation, Transmitters, Interfaces, Radio optics, Optical modulators
We report our recent progress on analog radio-over-fiber technology for mobile fronthaul applications in this invited talk from two perspectives: capacity expansion and signal quality enhancement. We first introduce our high-capacity fronthaul transmission experiment achieving >200-Gbps using a commercial transmitter optical subassembly (TOSA) module. Then, we introduce high-fidelity fronthaul transmission using optical angle modulation. Using these key techniques, it becomes possible to implement high-capacity and high-fidelity fronthaul systems.
Radio-over-fiber (RoF) including intermediate frequency-over-fiber (IFoF) technologies have been considered to be one of the effective transmission technologies for the mobile fronthaul (MFH) links in the fifth generation (5G) and beyond- 5G mobile communication systems. In this paper, we explain the concept of a MFH architecture for 5G and the future mobile services featuring cascaded IFoF and RoF links in which the functions of channel extractions and frequency conversions are implemented by the combination of analog and digital signal processing. In addition, we present our experimental results to verify the effectiveness of the cascaded IFoF-based MFH links.
KEYWORDS: Digital signal processing, Analog electronics, Signal processing, Transmitters, Radio over Fiber, Distortion, Modulators, Modulation, Dispersion, Clocks
This invited paper discusses the potential of the Intermediate Frequency-over-Fiber (IFoF) technology for future mobile fronthaul links. First, we explain the fundamental of IFoF and its advantages over the conventional digital-based schemes such as Common Public Radio Interface (CPRI) from the point view of centralized radio access network (C-RAN) architecture. Then, our recent results including the experimental demonstration of the 1-Tb/s CPRI-equivalent-rate transmission with a transmitter composed of parallel intensity/phase (IM/PM) modulators are presented.
KEYWORDS: Networks, Interfaces, Time division multiplexing, Standards development, Internet, Switching, Switches, Communication and information technologies, Wavelength division multiplexing, Transparency
IP+Optical networking technology is a key technology for realizing high-performance Internet backbone networks.
Dynamic optical path cut through can create high-throughput as well as low power consumption networks. National
Institute of Information and Communications Technology (NICT) Kei-han-na Info-Communication Open Lab,
Interoperability Consortium, is shooting for the leading edge photonic Generalized Multi-protocol Label Switching
(GMPLS) Inter-Carrier Interface that utilizes wide-bandwidth, cost-effective photonic technology to implement IPcentric
managed networks. Kei-han-na Open Lab is a consortium for researching the GMPLS protocol and advancing
a de facto standard in this area. Its experiments, new ideas, and protocols are submitted to standardization bodies such
as International Telecommunications Union-Telecommunication standardization sector (ITU-T), Internet Engineering
Task Force (IETF), and Optical Internetworking Forum (OIF). This paper details a nationwide GMPLS field trial that
used multi-vender, multi-switching capable equipment.
Conference Committee Involvement (4)
Asia-Pacific Optical Communications
3 September 2006 | Gwangju, South Korea
Network Architectures, Management, and Applications III
7 November 2005 | Shanghai, China
Network Architectures, Management, and Applications II
9 November 2004 | Beijing, China
Network Architectures, Management, and Applications
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