The Experts below are selected from a list of 324669 Experts worldwide ranked by ideXlab platform
Carlos Rodriguez - One of the best experts on this subject based on the ideXlab platform.
-
a survey on future Railway radio communications services challenges and opportunities
IEEE Communications Magazine, 2015Co-Authors: Juan Moreno, Jose Manuel Riera, Leandro De Haro, Carlos RodriguezAbstract:Radio communications is one of the most disruptive technologies in Railways, enabling a huge set of value-added services that greatly improve many aspects of Railways, making them more efficient, safer, and profitable. Lately, some major technologies like ERTMS for high-speed Railways and CBTC for subways have made possible a reduction of headway and increased safety never before seen in this field. The Railway industry is now looking at wireless communications with great interest, and this can be seen in many projects around the world. Thus, Railway radio communications is again a flourishing field, with a lot of research and many things to be done. This survey article explains both opportunities and challenges to be addressed by the Railway sector in order to obtain all the possible benefits of the latest radio technologies.
Jian-wen Ding - One of the best experts on this subject based on the ideXlab platform.
-
Radio Propagation and Wireless Channel for Railway Communications
Dedicated Mobile Communications for High-speed Railway, 2018Co-Authors: Zhang-dui Zhong, Fang-gang Wang, Jian-wen Ding, Gang Zhu, Ke Guan, Bo Ai, Lei Xiong, Hao Wu, Lei Lei, Rui-si HeAbstract:In this chapter, we study radio propagation and wireless channels for Railway communications. The first part of the chapter focuses on definitions of propagation scenarios. To begin with, high-speed Railway propagation scenarios are partitioned, and the characteristics of each scenario are described in detail. Then, traditional concepts of Railway communications and vehicular communications are summarized together to constitute a more general concept—wide-sense V2X (WSV2X). In this manner, the vehicles, trains, and infrastructures build up a wireless network enabling them to exchange controlling and traffic information, such as road obstacles, accidents, and so forth, via the wireless communication links. Correspondingly, all the propagation scenarios of WSV2X communications are defined in detail.In the second part of the chapter, we shift our focus to high-speed Railway channel measurements. Both narrowband and wideband measurement methods and systems are surveyed. Then, various measurement campaigns on high-speed Railways are depicted and discussed in detail.In the last part of the chapter, we study narrowband channel characteristics, i.e., path loss, shadow fading, and small-scale fading, for high-speed Railways. Afterwards, we study wideband characteristics for high-speed Railways in terms of delay characteristics, Doppler characteristics, and angular characteristics.
-
future Railway services oriented mobile communications network
IEEE Communications Magazine, 2015Co-Authors: Bo Ai, Thomas Kurner, Markus Rupp, Ke Guan, Xiang Cheng, Lei Xiong, Xuefeng Yin, Qi Wang, Yan Li, Jian-wen DingAbstract:The future development of the Railway is highly desired to evolve into a new era where infrastructure, trains, travelers, and goods will be increasingly interconnected to provide high comfort, with optimized door-to-door mobility at higher safety. For this vision, it is required to realize seamless high data rate wireless connectivity for Railways. To improve the safety and comfort of future Railways, wireless communications for Railways are required to evolve from only voice and traditional train control signaling services to various high data rate services including critical high-definition (HD) video and other more bandwidth-intensive passenger services, such as onboard and wayside HD video surveillance, onboard real-time high data rate services, train multimedia dispatching video streaming, Railway mobile ticketing, and the Internet of Things for Railways. Corresponding mobile communications network architecture under various Railway scenarios including inter-car, intra-car, inside station, train-to-infrastructure and infrastructure- to-infrastructure are proposed in this article. Wireless coverage based on massive MIMO for Railway stations and train cars is proposed to fulfill the requirement of high-data-rate and high spectrum efficiency. The technical challenges brought by the massive MIMO technique are discussed as well.
Juan Moreno - One of the best experts on this subject based on the ideXlab platform.
-
a survey on future Railway radio communications services challenges and opportunities
IEEE Communications Magazine, 2015Co-Authors: Juan Moreno, Jose Manuel Riera, Leandro De Haro, Carlos RodriguezAbstract:Radio communications is one of the most disruptive technologies in Railways, enabling a huge set of value-added services that greatly improve many aspects of Railways, making them more efficient, safer, and profitable. Lately, some major technologies like ERTMS for high-speed Railways and CBTC for subways have made possible a reduction of headway and increased safety never before seen in this field. The Railway industry is now looking at wireless communications with great interest, and this can be seen in many projects around the world. Thus, Railway radio communications is again a flourishing field, with a lot of research and many things to be done. This survey article explains both opportunities and challenges to be addressed by the Railway sector in order to obtain all the possible benefits of the latest radio technologies.
L Ingolotti - One of the best experts on this subject based on the ideXlab platform.
-
a topological model based on Railway capacity to manage periodic train scheduling
International Conference on Innovative Techniques and Applications of Artificial Intelligence, 2004Co-Authors: Miguel A Salido, Federico Barber, Pilar Tormos, Antonio Lova, Meritxell Abril, L IngolottiAbstract:Railway capacity has been a significant issue in the Railway industry. Over the last few years, numerous approaches and tools have been developed to compute Railway capacity. In this paper, we compute Railway capacity to design a topological model for solving periodic train scheduling, developed in collaboration with the National Network of Spanish Railways (RENFE). This topological technique transforms the Railway optimization problem in subproblems such that a traffic pattern is generated for each subproblem. These traffic patterns will be periodically repeated to compose the entire running map. The results show that this technique improve the results obtained by well known tools as LINGO and ILOG Concert Technology (CPLEX).
-
SGAI Conf. (Applications) - A Topological Model Based on Railway Capacity to Manage Periodic Train Scheduling
Applications and Innovations in Intelligent Systems XII, 2004Co-Authors: Miguel A Salido, Federico Barber, Pilar Tormos, Antonio Lova, Meritxell Abril, L IngolottiAbstract:Railway capacity has been a significant issue in the Railway industry. Over the last few years, numerous approaches and tools have been developed to compute Railway capacity. In this paper, we compute Railway capacity to design a topological model for solving periodic train scheduling, developed in collaboration with the National Network of Spanish Railways (RENFE). This topological technique transforms the Railway optimization problem in subproblems such that a traffic pattern is generated for each subproblem. These traffic patterns will be periodically repeated to compose the entire running map. The results show that this technique improve the results obtained by well known tools as LINGO and ILOG Concert Technology (CPLEX).
Athanasios Ballis - One of the best experts on this subject based on the ideXlab platform.
-
development and use of a model for the investigation of energy and emission aspects on the athens thessaloniki rail intermodal freight transport
Decision Support Systems, 2016Co-Authors: Eleni Tournaki, Athanasios BallisAbstract:Environmental protection is an issue that rises in importance in the agenda of the priorities in transportation sector. Railways are perceived to contribute positively towards such a direction. The current work focuses on the actual parameters that affect energy and emissions in rail freight transport. These parameters were investigated using a model. Input variables include technical and operational characteristics of the Railway track, the rolling stock and the loading units as well as the restrictions of the wagons' loading process, which prevent Railways to operate at full capacity. The model was validated on the main Greek Railway corridor connecting Athens to Thessaloniki. The analysis revealed and quantified the impacts affecting energy and emissions: train load factor, train speed, gradient profile of Railway track, rolling stock types, payload of transported loading units, rules of efficient wagon loading, fuel type and emission factor for electricity generation in the specific country. Comparisons with pure road transport and sensitivity analysis were also carried out on the Athens-Thessaloniki case study.
