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A Novel Front-hauling Architecture under Centralized Radio Access Network (C-RAN)
Haoran Mei,Mai Hassan,Limei Peng,Pin Han Ho 한국통신학회 2022 Journal of communications and networks Vol.24 No.3
Residential power line is considered a cost-effectivecommunication media for building a digital indoor distributednetwork thanks to its ubiquity in the indoor environment. This paper investigates a front-hauling system under the splitcentralized radio access network (C-RAN) architecture, aimingto examine the feasibility of implementing common public radiointerface (CPRI) over power line communication (PLC) channels. Particularly, we introduce a novel device called CPRI-PLCgateway (CPG) that provides a virtual CPRI link over the PLCchannel to ensure high reliability and efficiency in delivering theCPRI hyper-frames (HFs) between the data unit (DU) and radiounit (RU). We examine the proposed CPRI over PLC system viaextensive simulations in terms of the achievable throughput andreliability.
A Study on Sybil Attacks in Internet-of-Vehicles
Qiang Zhao,Zhiming He,Haoran Mei,Limei Peng 한국통신학회 2019 한국통신학회 학술대회논문집 Vol.2019 No.1
In this paper, we conduct a study on Sybil attacks under the environment of Internet of Vehicles (IoV). We study various types of Sybil attacks and their solutions in IoV, so as to solicit a novel algorithm to address the Sybil attack.
Dye-Sensitized-Assisted, Enhanced Photocatalytic Activity of TiO2/Bi4V2O11
Mengjun Liang,Zhiyuan Yang,Ying Mei,Haoran Zhou,Shuijin Yang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.3
In this study, the TiO2/Bi4V2O11 nanocomposite photocatalysts were prepared by loading different amount of TiO2 nanoparticles onto the surface of Bi4V2O11 nanospheres via a facile hydrothermal method. Afterwards, the as-synthesized samples were characterized by high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), N2 adsorption–desorption isotherms, X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (DRS) and photocurrent techniques. The optimal TiO2/Bi4V2O11 composite with 20 wt.% TiO2 loading (TB2) exhibited the best photocatalytic activity, which could degrade almost RhB completely within 30 min under visible light irradiation. The enhanced photocatalytic activity of TiO2/Bi4V2O11 composites for RhB degradation could be mainly ascribed to the efficient charge separation over dye-induced sensitized and the increased specific surface area. Also, the photocatalytic activities of TiO2/Bi4V2O11 for CIP degradation were tested. After five consecutive recycling experiments, the photocatalytic degradation activity of TB2 could still reach 99% which indicated that the catalysts had superior stability. Based on the experimental and bandgap calculations, a possible photocatalytic mechanism of TiO2/Bi4V2O11 for RhB degradation was proposed.