Radio-over-Fiber Distributed Antenna System for WiMAX Bullet Train Field Trial

Chow, Bruce; Yee, M.L.; Sauer, Matthias; Ng’oma, Anthony; Tseng, Ming-Chien; Yeh, Chih-Shen

doi:10.1109/mws.2009.33

Cited by 31 publications

(8 citation statements)

References 8 publications

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“…However, the authors of [62] recommended WIMAX over WiFi because of the longer coverage of the former. A combination of WIMAX and radio-over-fiber (RoF) technologies was proposed in previous studies [86], [88], [89]. 4) Satellite Communications Satellite communications are also considered a suitable candidate to connect trains to the global network, especially because of its advantages in rural areas [90], [91].…”

Section: A Existing Hsr Technologiesmentioning

confidence: 99%

Hyperloop Communications: Challenges, Advances, and Approaches

Hedhly

Amin

Shihada

et al. 2021

IEEE Open J. Commun. Soc.

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High-speed rail (HSR) communication has always been an attractive research topic with the continuous progress of transportation systems and communication technologies. Recently, Hyperloop has emerged as a candidate for very high-speed transportation systems. Because of its outstanding potential, Hyperloop can usher in a new transportation era with several attractive features. Developing suitable communication system solutions is crucial to bring this promising technology closer to reality. In addition, the Hyperloop communication system is essential to support monitoring-and-controlling services and deliver communication services inside its capsules/pods. Throughout this article, we overview Hyperloop technology and discuss its general characterization to recognize and estimate its relative position among the current HSR communication systems. Then, we investigate different attributes of the communication system, including network architecture, quality-of-service (QoS) requirements, and critical challenges to implement a reliable communication system. With the high speed of the capsule/pod and the system's unique structure, severe Doppler effect and frequent handover may considerably affect the operation of the communication system. Because Hyperloop is a recent development, it is necessary to study the existing HSR communication technologies to determine whether they can establish robust communication links for the Hyperloop system and deliver data with the required QoS. Furthermore, we provide technical details of the current HSR technologies and related research. Subsequently, we present the recent advances in the Hyperloop communication system with classification depending on whether it is a radio-, network-, antenna-, or software-based solution. Finally, we propose future research directions that can promote an improved communication performance. Hyperloop communications, high-speed rail communications, vacuum tube communications, vehicular communications. INDEX TERMS

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Section: A Existing Hsr Technologiesmentioning

confidence: 99%

Hyperloop Communications: Challenges, Advances, and Approaches

Hedhly

Amin

Shihada

et al. 2021

IEEE Open J. Commun. Soc.

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“…2, BBU i in the logic cell i sends same signals to its RAUs and only part of the RAUs receive signals from the train at a certain time interval. As long as the train moves within the coverage of the same BBU, the intra handoff can be neglected in spite of RAUs using different frequencies [7]. Therefore, in this paper, we concern about the handover between cell i and cell j , namely the handover at the edges of two adjacent logic cells.…”

Section: B Ground-to-train Networkmentioning

confidence: 99%

A Dual-Antenna and Mobile Relay Station Based Handover in Distributed Antenna System for High-Speed Railway

Qian

Jia

2013

2013 Seventh International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing

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When a train speeds up to 350km/h, it is challenging for continuous wireless coverage due to a number of critical issues, e.g. frequent handover and drop-offs. To address this problem, this paper proposes a novel handover scheme based on the dual antennas and Mobile Relay Station (MRS) for High Speed Railway (HSR) Distributed Antenna System (DAS). The scheme enables the dual antennas controlled by the MRS to receive signals from multiple Remote Antenna Units (RAUs), thus obtaining diversity gain when the train moves within one logic cell. While the train runs through the edge of a logic cell, a dual-antenna handover scheme is adopted to enhance the handover performance. Thereby, the proposal improves the quality of the received signal and provides reliable communication for train-toground network. The numerical analysis and simulation results show the proposed handover scheme can reduce handover frequency dramatically and provide the seamless access for HSR compared to the standard LTE handover scheme.

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“…This process is often followed in railway environment, it is usual to make test trials and research projects [6], [7] to evaluate the impact of a new system on the railway service.…”

Section: Introductionmentioning

confidence: 99%

Broadband Access in Complex Environments: LTE on Railway

Briso-Rodríguez

López

Fernandez

et al. 2014

IEICE Trans. Commun.

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SUMMARYThis paper assesses the main challenges associated with the propagation and channel modeling of broadband radio systems in a complex environment of high speed and metropolitan railways. These challenges comprise practical simulation, modeling interferences, radio planning, test trials and performance evaluation in different railway scenarios using Long Term Evolution (LTE) as test case. This approach requires several steps; the first is the use of a radio propagation simulator based on ray-tracing techniques to accurately predict propagation. Besides the radio propagation simulator, a complete test bed has been constructed to assess LTE performance, channel propagation conditions and interference with other systems in real-world environments by means of standard-compliant LTE transmissions. Such measurement results allowed us to evaluate the propagation and performance of broadband signals and to test the suitability of LTE radio technology for complex railway scenarios.

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Radio-over-Fiber Distributed Antenna System for WiMAX Bullet Train Field Trial

Cited by 31 publications

References 8 publications

Hyperloop Communications: Challenges, Advances, and Approaches

Hyperloop Communications: Challenges, Advances, and Approaches

A Dual-Antenna and Mobile Relay Station Based Handover in Distributed Antenna System for High-Speed Railway

Broadband Access in Complex Environments: LTE on Railway

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