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Wireless Communications in Intelligent Transportation Systems
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Wireless Communications in Intelligent Transportation Systems

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Remote Sensors".

Deadline for manuscript submissions: closed (22 December 2021) | Viewed by 19224

Special Issue Editors

Prof. Dr. César Briso-Rodríguez

E-Mail Website
Guest Editor
School of Telecommunication Engineering, Technical University of Madrid, 28031 Madrid, Spain
Interests: channel modeling; UAV technologies; antenna design
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Ke Guan

E-Mail Website
Guest Editor
State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China
Interests: measurement and modeling of wireless propagation channels; high-speed railway communications; ray-tracing and machine-learning-based digital twin of electromagnetic environments in various complex scenarios; such as vehicle-to-x communications; terahertz communication systems; integrated sensing and communications; space–air–ground integrated networks
Special Issues, Collections and Topics in MDPI journals
Dr. Andrej Hrovat

E-Mail Website
Guest Editor
Department of Communication Systems, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
Interests: radio signal propagation; radio channel modeling and measurements; localization and sensing; terrestrial and satellite communications
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Youyun Xu

E-Mail Website
Guest Editor
College of Telecommunications & Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
Interests: high speed trains/vehicles communications; satellite communications and space information network; B5G/6G communications and future human-machine interface; edge computing and intelligent reflecting M-MIMO railway communications

Special Issue Information

Dear Colleagues,

We would like to invite you to contribute to a Special Issue of Sensors on the subject area of “Wireless Communications in Intelligent Transportation Systems”. In the next generation of transportation vehicles, we are experiencing a development of faster and more efficient public transportation vehicles. Vehicles such as magnetic levitation trains can reach speeds higher than 400 km/h, and there are plans to increase this speed up to 1000KM/h traveling inside vacuum tubes. Moreover, unmanned vehicles such as UAVs or remote sensing devices demand high-quality communications for control, monitoring, and pay load. In all these cases, a special development of communication systems using state-of-the-art communication technology such as 5G and 802.11xx is necessary, but always considering the operational requirements, propagation environment, and dynamics of the vehicle.

This Special Issue will deal with novel techniques, applications, and propagation models for high-speed/mobility vehicles. Topics of interest for publication include but are not limited to:

  • Critical communications for transportation;
  • High-speed trains/vehicle communications;
  • Unmanned vehicles communications, UAVs, UGVs;
  • Aerospace communications with launcher and satellites;
  • Ultra-high-speed optimization;
  • 5G communications with high dynamics vehicles;
  • IEEE 802.11xx communications with high mobility vehicles;
  • Remote sensing of vehicles;
  • Propagation and channel modeling for communications with vehicles at speeds higher than 300 km/h;
  • Communications on ultra-high speed, vacuum, and magnetic levitation trains;
  • Remote sensing vehicles.

Prof. Dr. César Briso-Rodríguez
Prof. Dr. Ke Guan
Dr. Andrej Hrovat
Prof. Dr. Youyun Xu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • communications
  • smart transportation
  • unmanned vehicles
  • high speed vehicles
  • 5G/IEEE 802.11xx
  • propagation in complex environments
  • aerospatial vehicles
  • remote sensing
  • 5G/6G supported
  • UAV/UGV networks
  • propagation in rapidly changing environments
  • air-to-ground channel modelling
  • high-dynamic channel modelling

Published Papers (5 papers)

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Research

15 pages, 507 KiB  
Article
Location-Based LTE-M Uplink Power Control and Radio Resource Scheduling
by Jibao Wang and Hailin Jiang
Sensors 2022, 22(4), 1474; https://doi.org/10.3390/s22041474 - 14 Feb 2022
Cited by 1 | Viewed by 1465
Abstract
Long-Term Evolution for Metro (LTE-M) is adopted as the data communication system in urban rail transit to exchange bio-direction train-wayside information. Reliable data communication is essential in LTE-M systems for ensuring trains’ operation safety and efficiency. However, the inter-cell inference problem exists in [...] Read more.
Long-Term Evolution for Metro (LTE-M) is adopted as the data communication system in urban rail transit to exchange bio-direction train-wayside information. Reliable data communication is essential in LTE-M systems for ensuring trains’ operation safety and efficiency. However, the inter-cell inference problem exists in LTE results in throughput reduction, especially when trains are in the edge area of adjacent cells, and has negative effects on train operation. The uplink power control and radio resource scheduling scheme is studied in LTE-M system which differentiates from public cellular networks in user numbers and the availability of the trains’ locations. Since the locations of the trains are available, the interferences from the neighbouring cells can be calculated, and a location based algorithm together with soft frequency reuse is designed. In addition, a proportional fair algorithm is taken to improve uplink radio resource scheduling considering the fairness to different train-wayside communication service requirements. Through simulation, the practicability of the proposed schemes in communication system of urban rail transit is verified in aspects of radio power control and data communication throughput. Full article
(This article belongs to the Special Issue Wireless Communications in Intelligent Transportation Systems)
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52 pages, 7554 KiB  
Article
Survey on Optimization Methods for LEO-Satellite-Based Networks with Applications in Future Autonomous Transportation
by Kaan Çelikbilek, Zainab Saleem, Ruben Morales Ferre, Jaan Praks and Elena Simona Lohan
Sensors 2022, 22(4), 1421; https://doi.org/10.3390/s22041421 - 12 Feb 2022
Cited by 15 | Viewed by 8903
Abstract
Future autonomous transportation is one of the most demanding application areas in terms of connectivity, as it has to simultaneously meet stringent criteria that do not typically go hand in hand, such as high throughput, low latency, high coverage/availability, high positioning and sensing [...] Read more.
Future autonomous transportation is one of the most demanding application areas in terms of connectivity, as it has to simultaneously meet stringent criteria that do not typically go hand in hand, such as high throughput, low latency, high coverage/availability, high positioning and sensing accuracies, high security and robustness to interferences, etc. In order to meet the future demands of challenging applications, such as applications relying on autonomous vehicles, terrestrial networks are no longer sufficient and are to be augmented in the future with satellite-based networks. Among the emerging satellite networks, Low Earth Orbit (LEO) networks are able to provide advantages over traditional Medium Earth Orbit (MEO) and Geo-Stationary Earth Orbit (GEO) networks in terms of signal latency, cost, and performance. Nevertheless, several challenges exist in LEO system design, which have not been fully addressed in the existing literature. In particular, the problem of LEO-system optimization of design parameters is a multi-dimensional problem with many aspects to be considered. This paper offers a comprehensive survey of the LEO-system design parameters, of the challenges in LEO system design process, and of the optimization methods for satellite communication, positioning, and sensing applications, as well as a summarizing discussion on the design considerations for LEO-based networks to support future autonomous transportation. Full article
(This article belongs to the Special Issue Wireless Communications in Intelligent Transportation Systems)
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22 pages, 3688 KiB  
Article
A TDMA-Based MAC Protocol for Mitigating Mobility-Caused Packet Collisions in Vehicular Ad Hoc Networks
by Muhammad Bilal Latif, Feng Liu and Kai Liu
Sensors 2022, 22(2), 643; https://doi.org/10.3390/s22020643 - 14 Jan 2022
Cited by 10 | Viewed by 2598
Abstract
An autonomous driving environment poses a very stringent requirement for the timely delivery of safety messages in vehicular ad hoc networks (VANETs). Time division multiple access (TDMA)-based medium access control (MAC) protocols are considered a promising solution because of their time-bound message delivery. [...] Read more.
An autonomous driving environment poses a very stringent requirement for the timely delivery of safety messages in vehicular ad hoc networks (VANETs). Time division multiple access (TDMA)-based medium access control (MAC) protocols are considered a promising solution because of their time-bound message delivery. However, in the event of mobility-caused packet collisions, they may experience an unpredicted and extended delay in delivering messages, which can cause catastrophic accidents. To solve this problem, a distributed TDMA-based MAC protocol with mobility-caused collision mitigation (MCCM-MAC) is presented in this paper. The protocol uses a novel mechanism to detect merging collisions and mitigates them by avoiding subsequent access collisions. One vehicle in the merging collisions retains the time slot, and the others release the slot. The common neighboring vehicles can timely suggest a suitable new time slot for the vacating vehicles, which can avoid access collisions between their packet transmissions. A tie-breakup mechanism is employed to avoid further access collisions. Simulation results show that the proposed protocol reduces packet loss more than the existing methods. Consequently, the average delay between the successfully delivered periodic messages is also reduced. Full article
(This article belongs to the Special Issue Wireless Communications in Intelligent Transportation Systems)
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18 pages, 1209 KiB  
Article
Unmanned Aerial Vehicle Propagation Channel over Vegetation and Lake Areas: First- and Second-Order Statistical Analysis
by Deyvid L. Leite, Pablo Javier Alsina, Millena M. de Medeiros Campos, Vicente A. de Sousa, Jr. and Alvaro A. M. de Medeiros
Sensors 2022, 22(1), 65; https://doi.org/10.3390/s22010065 - 23 Dec 2021
Cited by 7 | Viewed by 2677
Abstract
The use of unmanned aerial vehicles (UAV) to provide services such as the Internet, goods delivery, and air taxis has become a reality in recent years. The use of these aircraft requires a secure communication between the control station and the UAV, which [...] Read more.
The use of unmanned aerial vehicles (UAV) to provide services such as the Internet, goods delivery, and air taxis has become a reality in recent years. The use of these aircraft requires a secure communication between the control station and the UAV, which demands the characterization of the communication channel. This paper aims to present a measurement setup using an unmanned aircraft to acquire data for the characterization of the radio frequency channel in a propagation environment with particular vegetation (Caatinga) and a lake. This paper presents the following contributions: identification of the communication channel model that best describes the characteristics of communication; characterization of the effects of large-scale fading, such as path loss and log-normal shadowing; characterization of small-scale fading (multipath and Doppler); and estimation of the aircraft speed from the identified Doppler frequency. Full article
(This article belongs to the Special Issue Wireless Communications in Intelligent Transportation Systems)
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28 pages, 3572 KiB  
Article
Video Packet Distribution Scheme for Multimedia Streaming Services in VANETs
by Yongje Shin, Hyunseok Choi, Youngju Nam and Euisin Lee
Sensors 2021, 21(21), 7368; https://doi.org/10.3390/s21217368 - 5 Nov 2021
Cited by 3 | Viewed by 1634
Abstract
By leveraging the development of mobile communication technologies and due to the increased capabilities of mobile devices, mobile multimedia services have gained prominence for supporting high-quality video streaming services. In vehicular ad-hoc networks (VANETs), high-quality video streaming services are focused on providing safety [...] Read more.
By leveraging the development of mobile communication technologies and due to the increased capabilities of mobile devices, mobile multimedia services have gained prominence for supporting high-quality video streaming services. In vehicular ad-hoc networks (VANETs), high-quality video streaming services are focused on providing safety and infotainment applications to vehicles on the roads. Video streaming data require elastic and continuous video packet distributions to vehicles to present interactive real-time views of meaningful scenarios on the road. However, the high mobility of vehicles is one of the fundamental and important challenging issues for video streaming services in VANETs. Nevertheless, previous studies neither dealt with suitable data caching for supporting the mobility of vehicles nor provided appropriate seamless packet forwarding for ensuring the quality of service (QoS) and quality of experience (QoE) of real-time video streaming services. To address this problem, this paper proposes a video packet distribution scheme named Clone, which integrates vehicle-to-vehicle and vehicle-to-infrastructure communications to disseminate video packets for video streaming services in VANETs. First, an indicator called current network quality information (CNQI) is defined to measure the feature of data forwarding of each node to its neighbor nodes in terms of data delivery ratio and delay. Based on the CNQI value of each node and the trajectory of the destination vehicle, access points called clones are selected to cache video data packets from data sources. Subsequently, packet distribution optimization is conducted to determine the number of video packets to cache in each clone. Finally, data delivery synchronization is established to support seamless streaming data delivery from a clone to the destination vehicle. The experimental results show that the proposed scheme achieves high-quality video streaming services in terms of QoS and QoE compared with existing schemes. Full article
(This article belongs to the Special Issue Wireless Communications in Intelligent Transportation Systems)
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