Two Novel Structures of Broadband Wireless Communication for High-speed Flying Train in Vacuum Tube

Zhang, Jiachi; Liu, Liu; Li, Zheng; Zhou, Tao; Qiu, Chencheng; Han, Bing; Wang, Dong; Piao, Zheyan

doi:10.1109/wocc.2019.8770647

Cited by 12 publications

(6 citation statements)

References 2 publications

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“…This is because the high speed increases the handover frequency, which highlights the issue of resource migration. As a novel design for ultra-highspeed rail transportation, existing research on the vactrain mainly concentrates on the wireless channel [26], train-to-ground wireless access architecture [27] and the frequent handover [28]. However, little work has been conducted when it comes to the network architecture.…”

Section: Discussionmentioning

confidence: 99%

Research on Resource Migration Based on Novel RRH-BBU Mapping in Cloud Radio Access Network for HSR Scenarios

et al. 2019

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Cloud radio access network (C-RAN) is considered as a promising architecture for 5G with advantages of green energy, convenient resources allocation. In this paper, we explore the feasibility of C-RAN for high-speed railway (HSR) scenarios. A novel phenomenon of group handover is defined in the extensively and densely distributed railway network and we present a resource migration cost with a closedform expression to depict the group handover. To reduce the cost, we propose a novel connection relationship between the remote radio head (RRH) and the baseband unit (BBU) pool. Based on this, we establish a flexible network so as to allocate the resource dynamically and formulate a graph by abstracting the RRH-BBU and BBU-BBU mapping relationship. Then the minimization of resource migration cost along the high-speed train (HST) routine is converted into the shortest path problem (SPP). By using the modified Floyd-Warshall algorithm, the SPP can be solved with high efficiency compared with the conventional algorithm. Finally, the simulation result shows that the proposed mechanism can decrease the resources migration cost significantly. INDEX TERMS Cloud radio access network, group handover, graph theory, high-speed railway communication, RRH-BBU mapping.

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Section: Discussionmentioning

confidence: 99%

Research on Resource Migration Based on Novel RRH-BBU Mapping in Cloud Radio Access Network for HSR Scenarios

et al. 2019

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“…Therefore, the antenna performance directly affects the signal strength, allowable bandwidth, and transmission direction. The antenna of Hyperloop communication systems has been thoroughly studied as one of the communication features between the Hyperloop and trackside [55], [115]- [117]. The challenges in antennas implementation and design in Hyperloop vary from regular challenges to those more related to the specific environment and requirements of Hyperloop.…”

Section: A Antenna-based Solutionsmentioning

confidence: 99%

“…The used antennas must have a large bandwidth to convey the high data rates needed for different services of Hyperloop communication. Furthermore, the waveform and propagation direction can help address the Doppler effect as in [117]. Recently, considerable efforts have been made to develop antenna-based solutions to address the challenges faced in Hyperloop communication towards achieving a successful design [55], [115]- [117].…”

Section: A Antenna-based Solutionsmentioning

confidence: 99%

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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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“…Despite some works that have been performed to analyze the train‐to‐ground communication system for vactrains (Qiu et al, 2019; Zhang et al, 2019), the development of the vacuum tube channel for vactrains is still in its preliminary phase and further investigations are required. Hence, we conduct some research and concentrate on the vactrain channel and provide some insights for further communication system research and design.…”

Section: Background and Related Workmentioning

confidence: 99%

Position‐Based Wireless Channel Characterization for the High‐Speed Vactrains in Vacuum Tube Scenarios Using Propagation Graph Modeling Theory

et al. 2020

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Wireless channel modeling is regarded as a pivotal research topic, since the analysis and evaluation of the wireless communication system requires a reliable model of the channel impulse response (CIR). This paper presents a novel and practical study on the position-based radio propagation channel for high-speed vactrains in the vacuum tube scenarios using the propagation graph channel modeling theory. Based on the Lambertian scattering pattern, the propagation graph channel modeling method considers the diffusion effect of radio waves. A multiple-input multiple-output (MIMO) wideband system channel is emulated for obtaining the virtual channel data. During the emulation process, the line-of-sight (LoS), single-bounced and double-bounced components are considered to yield the virtual CIR. Then, small-scale fading properties such as K factor, time delay spread (DS), and Doppler frequency feature are parameterized particularly, which presents dynamic variances at different train locations. Moreover, the simulation performance analysis of the MIMO system focuses on the ergodic capacity and the singular value spread (SVS). The corresponding results indicate a MIMO capacity performance degradation in this scenario. The proposed model can facilitate the reliable simulation and evaluation of MIMO systems for the high-speed vactrains in the vacuum tube scenarios.

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Two Novel Structures of Broadband Wireless Communication for High-speed Flying Train in Vacuum Tube

Cited by 12 publications

References 2 publications

Research on Resource Migration Based on Novel RRH-BBU Mapping in Cloud Radio Access Network for HSR Scenarios

Research on Resource Migration Based on Novel RRH-BBU Mapping in Cloud Radio Access Network for HSR Scenarios

Hyperloop Communications: Challenges, Advances, and Approaches

Position‐Based Wireless Channel Characterization for the High‐Speed Vactrains in Vacuum Tube Scenarios Using Propagation Graph Modeling Theory

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