Speaker
Description
Wireless communication is experiencing radical changes driven by the need for ultra-wide bandwidth to realize emerging future applications such as metaverse, vehicle-to-everything (V2X), and so on [1]. While the mid-band 5G networks employing 3.5 GHz band are being actively deployed worldwide, attention is already turning to millimeter (mmWave)- and terahertz-based services to prepare for the beyond-5G era. However, such ultra-high frequency-based services introduce multiple challenges: i) the cell/sector size shrinks due to the increased line-of-sight (LoS) path loss, ii) the extreme vulnerability to physical blockages creates lots of shadow areas. Thus, it will be difficult to bring coverage indoors where 80 % of mobile data are generated and consumed. It subsequently needs the future mobile network to tightly integrate with fibre optic transmission system.
This presentation aims to provision a holistic view of the design and analysis of fibre-wireless convergence network of beyond 5G era. Especially, we introduce and characterize radio-over-fiber (RoF)-based distributed antenna system (DAS), which is a key enabler of the flexible and cost-efficient fiber-wireless convergence network in beyond-5G era. To be more specific, we present various topologies of the indoor DAS network enabled by the RoF technology that differs the transmission scheme according to the class of mobile services. In addition, we suggest a new DAS architecture that can support diverse mobile services including millimeter wave 5G and terahertz 6G as well as commercial 5G systems employing 3.5 GHz bands [2]. Following the experimental validation of the proposed system, we investigate the total cost of ownership of the proposed system and compare it to conventional topologies such as point-to-point and wavelength division multiplexing (WDM)-based point-to-multipoint connections.
References
[1] B. Samon, ‘Setting the scene for 5G: opportunities and challenges,’ Int. Telecommun. Union, Cham, Switzerland, ITU Rep. D-PREF-BB.5G, September 2018.
[2] 17. S.-R. Moon, M. Sung, E.-S. Kim, J. K. Lee, S.-H. Cho, and J. Kim, "RoF-based indoor distributed antenna system that can simultaneously support 5G mmWave and 6G terahertz services," Opt. Express 30(2), 1521-1533 (2022).
| Keywords | distributed antenna system, 5G, 6G |
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