Journal ArticleDOI
Long term evolution in high speed railway environments: Feasibility and challenges
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TLDR
The feasibility of LTE as a successor to GSM-R for new railway mobile communication systems is described and its ability to support both the migration of current railway services and the provisioning of potential future ones is analyzed.Abstract:
Long Term Evolution (LTE) is considered to be the natural evolution for the current Global System for Mobile Communications-Railways (GSM-R) in high speed railway environments, not only for its technical advantages and increased performance, but also due to the current evolution of public communication systems. In railway environments, mission critical services, operation assistance services, and passenger services must be supported by reliable mobile communication systems. Reliability and availability are key concerns for railway operators and as a consequence, railway operators are usually conservative adopters of information and communication technologies (ICT). This paper describes the feasibility of LTE as a successor to GSM-R for new railway mobile communication systems. We identify key features of LTE as a technology and analyze its ability to support both the migration of current railway services and the provisioning of potential future ones. We describe the key challenges to address specific requirements for railway communication services including the provisioning of voice service in LTE networks, handover performance, multicast multimedia transmission, and the provisioning of group communications service and railway emergency calls.read more
Citations
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Channel Measurements and Models for High-Speed Train Communication Systems: A Survey
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A Dual-Link Soft Handover Scheme for C/U Plane Split Network in High-Speed Railway
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Development Trends of Mobile Communication Systems for Railways
TL;DR: The existing GSM-R system is reviewed, future development of user demands and various data services are discussed, which suggests the key performance indicators of the future mobile communication systems for railways.
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Transmit Power Minimization and Base Station Planning for High-Speed Trains With Multiple Moving Relays in OFDMA Systems
Hakim Ghazzai,Taha Bouchoucha,Ahmad Alsharoa,Elias Yaacoub,Mohamed-Slim Alouini,Tareq Y. Al-Naffouri +5 more
TL;DR: This paper derives the optimal resource-allocation solution, in terms of OFDMA subcarriers and power allocation, using the dual decomposition method, and proposes an efficient algorithm based on the Hungarian method to find a suboptimal but low-complexity solution.
References
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Journal ArticleDOI
Measurements and Modeling of Distributed Antenna Systems in Railway Tunnels
TL;DR: The improvements of signal-to-noise ratio and the reduction of the blocking effects of two trains passing have demonstrated the advantages of using isofrequency distributed antenna systems in tunnels, and the model has proven to be very useful for radio planning in new railway networks.
Journal ArticleDOI
A CoMP soft handover scheme for LTE systems in high speed railway
TL;DR: An optimized handover scheme is proposed, in which the coordinated multiple point transmission technology and dual vehicle station coordination mechanism are applied to improve the traditional hard handover performance of LTE.
Proceedings ArticleDOI
The LTE radio interface - key characteristics and performance
TL;DR: Some key characteristics of the LTE radio interface, including physical layer and radio resource management functions, are presented, and their impact on system performance is evaluated.
Journal ArticleDOI
Mission critical communication networks for railways
Michael Liem,Veena B. Mendiratta +1 more
TL;DR: The LTE network architecture is presented and the suitability of LTE to meet the requirements of the railway sector is assessed, with a special focus on reliability.
Proceedings ArticleDOI
Seamless voice over LTE
TL;DR: The paper compares various aspects of these solutions and suggests possible roadmap that operators can adopt to provide seamless voice over LTE.