Results 21 to 30 of about 2,026 (247)

Research on Dynamic Virtualization Distributed Mobility Management Method for LEO Satellite Network

天地一体化信息网络, 2020
With the commercialization of 5G,the integration of satellite communication and ground 5G has become a key research direction in the industry.Low earth orbit satellite network can cover the whole world and communicate with anyone at any time and anywhere.
Hongtao ZHU, Qing GUO
doaj   +2 more sources

Fast-Convergence Reinforcement Learning for Routing in LEO Satellite Networks

Sensors, 2023
Fast convergence routing is a critical issue for Low Earth Orbit (LEO) constellation networks because these networks have dynamic topology changes, and transmission requirements can vary over time.
Zhaolong Ding, Huijie Liu, Feng Tian, Zijian Yang, Nan Wang   +4 more
doaj   +1 more source

Application of the Power Grid Business Carrying on Low Earth Orbit Broadband Satellite Internet

天地一体化信息网络, 2023
LEO (Low-earth-orbit) broadband satellite internet can provide a lot of user with all-time network coverage, broadband access and information transport service, which has the advantage of high capacity, broad band, low delay and high elasticity as space ...
Liang ZHU, Shaobo QI, Bo YANG, Bingyu XU, Zifan LI, Shijie ZHANG   +5 more
doaj   +2 more sources

Survey on Routing Algorithms for LEO Constellations Network [PDF]

Fayoum University Journal of Engineering
The fast growth of communication technology has resulted from the desire for information globalization. Satellite communication systems, which have the benefits of extensive coverage and minimal requirements on the geographical environment as compared to
Eman Elbehiry, Heba TagElDien, Ahmed Fares, Basem ElHalawany   +3 more
doaj   +1 more source

Overview of LEO satellite networking communication technology for direct-to-phone connectivity

Zhongguo kongjian kexue jishu
To overcome the limitations of traditional terrestrial communication coverage and establish seamless, all-time, all-domain connectivity capabilities through direct-to-phone connection of integrated space-ground services, this study conducts a systematic ...
LI Jingling , WANG Xianyu, ZHEN Li, MENG Qingzhi, LIANG Wei, MU Tong, CUI Tao, LI Qian, CUI Wanzhao   +8 more
doaj   +1 more source

LEO satellite communication networks—a routing approach [PDF]

Wireless Communications and Mobile Computing, 2003
AbstractIn the modern world of telecommunications, the concept of wireless global coverage is of the utmost importance. However, real global coverage can only be achieved by satellite systems. Until recently, the satellites were in geostationary orbit and their high altitude could not allow real‐time communication such as cellular networks.
S. A. M. Makki, Niki Pissinou, Philippe Daroux   +2 more
openaire   +1 more source

Trustworthy handover in LEO satellite mobile networks

ICT Express, 2022
Recently, a low earth orbit (LEO) satellite network is one of major systems to provide seamless access for terrestrial network systems. In order to provide robust access, efficient handover mechanisms are essential. However, conventional mechanisms may introduce frequent handovers due to the rapid movement of satellites. To deal with this problem, this
Soyi Jung, Moon-Sik Lee, Jihyung Kim, Mi-Young Yun, Joongheon Kim, Jae-Hyun Kim   +5 more
openaire   +2 more sources

Oxygen‐Tunnel Indium Tin Oxide Vertical Channel Transistors with Enhanced Current Density and Reliability for Monolithic 3D Compute‐In‐Memory Systems

Advanced Functional Materials, EarlyView.
Oxygen‐tunnel (OT) indium tin oxide (ITO) vertical channel transistors (VCTs) enable reliable, high‐density gain‐cell memory for monolithic 3D integration. A sandwiched SiN/SiO2/SiN OT stack selectively regulates oxygen transport, suppressing parasitic electrode oxidation while stabilizing channel oxygen vacancies, thereby suppressing carrier injection
Hyeonho Gu, Haksoon Jung, Yongwoo Lee, Hoichang Jeong, Yanfeng Zhao, Heesoo Yang, Minho Park, Hyeonjin Lee, Seunghun Baek, Minju Song, Junghwan Kim, Youngmin Jo, Hyunjin Park, Munhyeon Kim, Jae‐Joon Kim, Kyuho Jason Lee, Byungjo Kim, Jimin Kwon   +17 more
wiley   +1 more source

Monolithic Oxidation Enables Ultrathin Vertically Graded Tantalum Oxide for Low‐Voltage, Low‐Variability Memristive Switching

Advanced Functional Materials, EarlyView.
Monolithic UV‐ozone oxidation of Ta forms an ultrathin Ta2O5/TaOx bilayer enabling resistive switching with a vertical defect gradient. A stoichiometric surface layer over an oxygen‐deficient sublayer promotes localized filament nucleation near the top interface, enabling low‐voltage operation, and reduced cycle‐to‐cycle variability.
Seunghoon Yang, Dong Hyun Lee, Conan Weiland, Won‐Il Lee, Kim Kisslinger, Mingzhao Liu, Aswin kumar Anbalagan, Xiao Tong, Soumyajit Mandal, Nikhil Tiwale, Houk Jang, Chang‐Yong Nam   +11 more
wiley   +1 more source

Azobenzene's Cross‐Scale Optics and Photonics: Molecular Photoswitching, Mesoscopic Material Motions, and Adaptive Devices

Advanced Materials, EarlyView.
Azobenzene photoswitches translate molecular‐scale E/Z photoisomerization into macroscopic material responses and device‐level photonic functions. This Review highlights how azobenzene research has evolved from molecular photochemistry to photoalignment, mass migration, photomechanics, and heat release, ultimately enabling holography, reconfigurable ...
Heeju Son, Soyul Kwak, Heerin Noh, Minsang Kim, Doyeon Noh, Subhayan Chakraborty, Jaewon Lee, YongDeok Cho, Kyeongsoo Kim, Taewoong Eom, Moonyoung Kim, Jangwon Kim, Hoyoung Lee, Soyoung Lee, Jaehun Kim, Grace G. D. Han, Shin‐Tson Wu, Stefano Oscurato, Arri Priimagi, Marina Saphiannikova, Seungwoo Lee   +20 more
wiley   +1 more source