Coverage Analysis and Optimization for High-Speed Railway Communication Systems With Narrow-Strip-Shaped Cells

Lin, Sheng-Hong; Xu, Youyun; Wang, Jin‐Yuan

doi:10.1109/tvt.2020.3013341

Cited by 17 publications

(4 citation statements)

References 31 publications

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“…More precisely, this has proven to suitably represent the narrow-strip-shaped cells in high-speed railway (HSR) communications. Elliptical cells offer a higher coverage percentage than the traditional circular ones since the users are almost deployed along the rail tracks [6], [7]. An elliptical rather than circular footprint can also be created even in vertical transmission when the azimuth and elevation half-power beamwidths (HPBWs) of the directional antenna are not equal [8], [9].…”

Section: A Preliminariesmentioning

confidence: 99%

Exploring the Random Location Problem Inside a Truncated Conic Shape: Application in UAV Communications

Vaiopoulos

Vavoulas

Sandalidis

2022

IEEE Trans. Commun.

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Wireless transmitters (Txs) radiating directionally downwards often generate circular footprints on the ground. In certain scenarios, using elliptical cells can offer increased flexibility for providing user coverage, owing to the unique network characteristics. For instance, an elliptical footprint can be produced when a practical directional antenna with unequal azimuth and elevation half-power beamwidths is used in high-speed railway networks. Another common scenario involves the production of an elliptical footprint when an airborne Tx radiates at an angle by tilting its directional antenna by a few degrees.This paper aims to investigate, for the first time, the association between the random user location within an elliptical coverage area and the performance of a wireless communication link by considering these scenarios. We assume an unmanned aerial vehicle (UAV) as a Tx, although a tall cellular base station tower could also be employed without losing generality. To better understand the impact of random location, we derive relevant distance metrics and investigate the outage probability of the link for the two scenarios, taking both random terminal location and fading impairments into account. The findings may provide valuable insights into the performance of similar wireless systems.

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Section: A Preliminariesmentioning

confidence: 99%

Exploring the Random Location Problem Inside a Truncated Conic Shape: Application in UAV Communications

Vaiopoulos

Vavoulas

Sandalidis

2022

IEEE Trans. Commun.

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“…The constraints are everywhere in the real world. For instance, the short circuit current constraint in high IBG-penetrated power system, 1 the coverage constraint and the total coverage distance constraint in high-speed railway communication system, 2 the resource constraint of sensor nodes in image communication system, 3 etc. Since Hertz distinguished between holonomic and nonholonomic constraints for mechanical systems, the nonholonomic system becomes the research topic of many practical problems, such as spherical shell rolling system, 4 waveboard multibody model 5 and Chaplygin sleigh like system, 6 etc.…”

Section: Introductionmentioning

confidence: 99%

Hyperchaos, constraints and its stability control in a 6D hyperchaotic particle motion system

Cui

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Firstly, a novel six-dimensional (6D) hyperchaotic particle motion system is formulated. The equilibrium points and their characteristics, Poincaré sections, Lyapunov exponents, bifurcations and multi-periodic windows are studied. Secondly, we present two nonholonomic constrained systems. In order to analyze the particle motion trajectories under constraints, the explicit equations for constrained systems are given. Based on Lyapunov exponents, Poincaré maps and bifurcations, we can see that the different hyperchaotic phenomena of the particle motion can be generated by introducing nonholonomic constraints. Finally, the stability control of the 6D hyperchaotic particle motion system is realized by separately using constraint control method and linear feedback control method. Numerical simulations of the dynamical behaviors of the six-dimensional hyperchaotic particle motion system are carried out in order to illustrate the complex phenomena of the systems and verify the analysis results.

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“…Since these two technologies have different requirements on the spacing of antenna array elements, combining STBC with beamforming technology faces challenges. Reference [12] proposed a beamforming mechanism combined with STBC, and reference [13] proposed a beam switching mechanism combined with STBC.…”

Section: Introductionmentioning

confidence: 99%

Research on High-Speed Railway Communication Strategy Based on LIFI Technology

Chen¹,

2022

Advances in Multimedia

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In order to improve the effect of high-speed railway communication, this paper studies the high-speed railway communication strategy combined with LIFI technology and improves the effect of high-speed railway communication through intelligent communication methods. Moreover, this paper studies the access point allocation problem in indoor LiFi/WiFi hybrid network, fully considers the dynamic change of network load, and introduces a dynamic load balancing algorithm that determines AP allocation in hybrid network based on the data transmission rate as the switching threshold. In addition, this paper proposes two AP allocation methods, such as dynamic switching threshold and minimum data rate constraint, to construct a reliable high-speed railway communication model. The experimental results verify that the high-speed railway communication strategy based on LIFI technology proposed in this paper can effectively improve the high-speed railway communication effect.

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Coverage Analysis and Optimization for High-Speed Railway Communication Systems With Narrow-Strip-Shaped Cells

Cited by 17 publications

References 31 publications

Exploring the Random Location Problem Inside a Truncated Conic Shape: Application in UAV Communications

Exploring the Random Location Problem Inside a Truncated Conic Shape: Application in UAV Communications

Hyperchaos, constraints and its stability control in a 6D hyperchaotic particle motion system

Research on High-Speed Railway Communication Strategy Based on LIFI Technology

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