Planning Optimization of the Distributed Antenna System in High-Speed Railway Communication Network Based on Improved Cuckoo Search

Chen, Zhaoyu; Liu, Yanheng; Sun, Geng; Zhou, Xu; Li, Boyu; Liang, Shuang; Zhou, Qianyu

doi:10.1155/2018/3641286

Cited by 3 publications

(3 citation statements)

References 43 publications

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“…The experimenter and the train operator would discuss the cause of the failure and potential preventive measures. Among these challenges were stopped in train operations, misunderstandings in the chain of command, erroneous trip statistics, and undetected safety concerns for rail travel [8].…”

Section: Experimental Designmentioning

confidence: 99%

The impact of communication equipment and monitoring systems to the safety of train operations

Zhang

2023

Second International Conference on Statistics, Applied Mathematics, and Computing Science (CSAMCS 2022)

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This paper investigates whether the widespread use of wireless communication devices and real-time monitoring systems can guarantee the safety of trains operating in irregular terrain. Freight train transportation is characterized by its quick speeds, independence from topography, enormous carrying capacity, safety and so on. These characteristics define its prominent role in the integrated transportation system. As a result, safeguarding the safety of freight train transportation is crucial for any nation, and all nations have adequate methods and measures for railroad transportation safety. In order to increase train driving safety, transportation departments will typically require train crews to employ communication devices and video surveillance systems. This technical method allows each transportation department to guarantee railway safety directly. In this paper, researchers split the trains into two groups, had them transport the same products, and had their work in the same environment. The most cutting-edge and complete communication technology is installed in one group of trains, and this group also has a real-time tunnel monitoring system, whereas the other group has comparatively older communication equipment and no such system. Finally, the safety of the train movement was examined to determine how it would alter based on the existence of communication equipment and video monitoring systems by comparing the train movement and failure data between the two sets of trains in the same transportation environment. The researchers could demonstrate the viability and practicality of a comprehensive communication tool and monitoring system by comparing the number of failures.

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Section: Experimental Designmentioning

confidence: 99%

The impact of communication equipment and monitoring systems to the safety of train operations

Zhang

2023

Second International Conference on Statistics, Applied Mathematics, and Computing Science (CSAMCS 2022)

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“…In the following, we introduce four categories of handover improvement methods for HSRs. The first category consists of methods which are based on use of new technologies such as CoMP, 6,23,24 DAS, 25,26 and antenna beam forming. 27 These methods also include redundancy of base stations and antennas.…”

Section: Related Workmentioning

confidence: 99%

An enhancedLTEhandover scheme for high‐speed railway application

Sadrabadi

Ardalani

Bakhshi

2021

Trans Emerging Tel Tech

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High‐speed railway (HSR) is one of the most important modes of passenger transport with many advantages, such as; safety, high capacity, short intervals, and comfort. To provide high speed mobile data to the passengers of HSR for infotainment services, the best option is LTE or LTE‐R. The LTE‐R is a railway specialized network under development. The very high speed of trains in HSR, which are far faster than conventional commuters, counteracts the seamless data service and deteriorates the QoS which is mainly due to handover (HO) failure when the user equipment (UE) is moving very fast. Conventional LTE HO schemes are not designed for very high speed of HSR. Some research studies were done to provide HO schemes with more adaptation with the HSR condition but the desired specifications are not fully satisfied. In this article, we have devised a new S3 scheme for LTE HO based on time‐to‐trigger parameter in which the required ETSI's HO success rate standard at very high speed moving UE is met with a good safety margin. In addition, the presented scheme shows better performance in terms of HO latency, reference signal received power gap and handover operation probability. To do the job, an accurate mathematical analysis was developed for the proposed S3 scheme, conventional A3 and A4 schemes and the H2 scheme that we found to be the best one out of previous research studies. The results obtained have been verified by simulations.

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“…For the large-scale optimization problems with complex constraints, these kinds of methods require excessive analysis and iteration of optimization. To overcome this limitation, various improved methods were proposed to reduce the computational cost and increase the convergence speed [22,23].…”

Section: Introductionmentioning

confidence: 99%

Gradient-based optimization method for interference suppression of linear arrays by the amplitude-only and phase-only control

Gao

Tang

Wang

et al. 2021

Int. J. Microw. Wireless Technol.

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This paper presents a gradient-based optimization method for interference suppression of linear arrays by controlling the electrical parameters of each array element, including the amplitude-only and phase-only. Gradient-based optimization algorithm (GOA), as an efficient optimization algorithm, is applied to the optimization problem of the anti-interference arrays that is generally solved by the evolutionary algorithms. The goal of this method is to maximize the main beam gain while minimizing the peak sidelobe level (PSLL) together with the null constraint. To control the nulls precisely and synthesize the radiation pattern accurately, the full-wave method of moments is used to consider the mutual coupling among the array elements rigorously. The searching efficiency is improved greatly because the gradient (sensitivity) information is used in the algorithm for solving the optimization problem. The sensitivities of the design objective and the constraint function with respect to the design variables are analytically derived and the optimization problems are solved by using GOA. The results of the GOA can produce the desired null at the specific positions, minimize the PSLL, and greatly shorten the computation time compared with the often-used non-gradient method such as genetic algorithm and cuckoo search algorithm.

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Planning Optimization of the Distributed Antenna System in High-Speed Railway Communication Network Based on Improved Cuckoo Search

Cited by 3 publications

References 43 publications

The impact of communication equipment and monitoring systems to the safety of train operations

The impact of communication equipment and monitoring systems to the safety of train operations

An enhancedLTEhandover scheme for high‐speed railway application

Gradient-based optimization method for interference suppression of linear arrays by the amplitude-only and phase-only control

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