A5055956815- Satellite Communication Systems
- IoT Networks and Protocols
- Software-Defined Networks and 5G
- Advanced Optical Network Technologies
- Wireless Communication Networks Research
- Advanced Photonic Communication Systems
- Photorefractive and Nonlinear Optics
- Opportunistic and Delay-Tolerant Networks
- Photonic and Optical Devices
- Flood Risk Assessment and Management
- Spacecraft Design and Technology
- Hydrology and Watershed Management Studies
- Full-Duplex Wireless Communications
- Remote Sensing and LiDAR Applications
- Soil erosion and sediment transport
- Telecommunications and Broadcasting Technologies
- Climate variability and models
- Precipitation Measurement and Analysis
- Network Security and Intrusion Detection
- Cooperative Communication and Network Coding
- Water resources management and optimization
- Solid State Laser Technologies
- Mobile Agent-Based Network Management
- Forest Management and Policy
- Metaheuristic Optimization Algorithms Research
Wuhan National Laboratory for Optoelectronics
2021-2024
Huazhong University of Science and Technology
2021-2024
Ludong University
2022
Nanjing University of Posts and Telecommunications
2017-2019
Internet of Things (IoT) is one the evolutionary directions Internet. This paper focuses on low earth orbit (LEO) satellite constellation-based IoT services for their irreplaceable functions. In many cases, devices are distributed in remote areas (e.g., desert, ocean, and forest) some special applications, they placed extreme topography, where unable to have direct terrestrial network accesses can only be covered by satellite. Comparing with traditional geostationary (GEO) systems, LEO...
Network virtualization (NV) is considered as an enabling tool to remove the gradual ossification of current Internet. In network environment, a set heterogeneous virtual networks (VNs), isolated from each other, share underlying resources one or multiple substrate (SNs) according resource allocation strategy. This kind strategy commonly known so called Virtual Embedding (VNE) algorithm in virtualization. Owing common sense that VNE problem NP-hard nature, most algorithms proposed literature...
Abstract Lithium niobate on insulator (LNOI) is rising as one of the most promising platforms for integrated photonics due to high-index-contrast and excellent material properties lithium niobate, such wideband transparency from visible mid-infrared, large electro-optic, piezoelectric, second-order harmonic coefficients. The fast-developing micro- nano-structuring techniques LNOI have enabled various structure, devices, systems, applications. In this contribution, we review latest...
Abstract Thin‐film lithium niobate (TFLN)‐based electro‐optic modulators have extensive applications in broadband optical communications due to their broad bandwidth, high extinction ratio, and low loss. However, compared with silicon indium‐phosphide (InP)‐based counterparts, TFLN exhibits lower modulation efficiency. Simultaneously achieving driving voltage a wide modulating bandwidth poses significant challenge. To address this limitation, paper proposes transparent conductive oxide film...
Space information network (SIN) plays an extremely important role in civil and military applications. However, a specific definition of SIN still remains challenging issue. Unlike space communication (SCN), which merely focuses on delivery, has the ability to process delivered providing corresponding services based information, makes seem be able understand information. This paper offers architecture model for time-space uninterrupted SIN. Initially, both physical logical constitution are...
Virtual network embedding (VNE) refers to the resource allocation problem for virtualization. Since its inception, multiple mapping algorithms have been proposed virtual networks (VNs) effectively and efficiently. However, prior mostly complete VN in two separated stages: first node subsequent link embedding. Certain embed one stage by using mixed integer linear programming method or subgraph isomorphism approach, involving high completion time. Meanwhile, researchers conduct embedding, on...
Internet of Things (IoT) has become an essential part the coming 5th generation (5G). As a powerful supplementation, satellite systems can extend terrestrial IoT network to full-time global network. In order effectively allocate relatively limited on-board resources for meeting massive access demand, traffic model needs be studied. this paper, we analyze characteristics satellite-based devices based on corresponding geographic properties and applications. Such combining with specific LEOSCS...
Network virtualization (NV) has been accepted as the integral paradigm of next generation network (e.g., 5G virtualized network) since its inception. Virtual embedding (VNE) is resource optimization problem for NV. Over past decade, multiple VNE algorithms have proposed. However, prior focus on more proposed virtual networks (VNs) onto shared substrate (SNs) so to maximize revenues internet service providers (ISPs), managing and operating SNs. Due fact that energy cost approaching than half...
Though short range communication technologies still support the major part of Internet Things (IoT) connections in future, low power wide area networks (LPWAN) have shown great competitive among other IoT connecting technologies. Moreover, to overcome coverage limitation terrestrial networks, combining with satellite can provide services globally and seamlessly. Among satellites from different kinds orbits, earth orbit (LEO) is a good candidate due its propagation delay, small loss global...
Nested Delft 3D and Hydrus 1D models were applied to simulate variations in the hydrological process of tidal creeks, soil water, salt transport profile reconstruction area Yellow River Delta under six gate dam scenarios. The results showed that set up near sea was more conducive reducing variation range water depth area. changes scenarios with 6 m valves higher than those 3 sluice same location. surface salinity, cumulative flooding time, frequency, infiltration each scenario similar for...
Satellite communication systems (SCS) operating on frequency bands above 10GHz are sensitive to atmosphere physical phenomena, especially rain attenuation. To evaluate impairments in satellite performance, stochastic dynamic modeling (SDM) is considered as an effective way predict real-time channel fading caused by rain. This article carries out a survey of SDM using differential equations (SDEs) currently the literature. Special attention given different input characteristics each model...
A novel ultra-wideband microwave photonic circulator scheme is proposed and demonstrated. In this scheme, the composed of a laser diode, specially-designed thin-film lithium niobate modulator photodetector. Benefited from large modulation index difference between forward counter in MZM, with high isolation. experiment, isolation larger than 10 dB frequency range 6.3 GHz to 50 GHz, while maximum 30.1 at 8.7 GHz. The measured response curves agree well those obtained simulation. This employed...
Network virtualization (NV) is widely considered as a key component of the future network and promises to allow multiple virtual networks (VNs) with different protocols coexist on shared substrate (SN). One main challenge in NV embedding (VNE). VNE NP-hard problem. Previous algorithms literature are mostly heuristic, while remaining exact. Heuristic aim find feasible each VN, not optimal or sub-optimal, polynomial time. Though presenting sub-optimal per exact too time-consuming small-scaled...
Two-axis transportable satellite antennas (TATSAs) have been widely adopted owing to its simple structure and low cost. However, by searching in a wide range, it will take very long time. Under extreme conditions, even fail work. In this paper, we propose novel roll compensation (RC) method for the low-cost TATSAs achieve faster tracking if when antenna has no azimuth sensor. By analyzing influence of axis on system performance, details are derived. Simulation measurement results indicate...
It has been shown that packet repetition and successive interference cancellation (SIC) can effectively improve the throughput of frame-slotted ALOHA (FSA) have investigated within Digital Video Broadcasting (DVB) standardization. However, basing on collision channel model, upper bound for different versions FSA is up to 1 packet/slot. Capture effect, which significant in practical radio channels utilizing power unbalance, be considered solve colliding problem under high traffic load...
Thin film lithium niobate (TFLN) based electro-optic modulator is widely applied in the field of broadband optical communications due to its advantages such as large bandwidth, high extinction ratio, and low loss, bringing new possibilities for next generation high-performance modulators. However, modulation efficiency TFLN modulators still relatively when compared with Silicon Indium-Phosphide (InP) competitors. Due restriction trade-off between half-wave voltage length, it difficult...