Comparison of current solutions for the provision of voice services to passengers on high speed trains

Abrishamkar, F.; Irvine, James

doi:10.1109/vetecf.2000.886083

Cited by 28 publications

(10 citation statements)

References 10 publications

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“…Wireless voice communication with moving trains has already been studied for decades [1][2][3][4]. More recent studies focus on the offering of data services on board of the trains [5], excluding the dedicated safety signaling systems (e.g., European Rail Traffic Management System, ERTMS [6]).…”

Section: Introductionmentioning

confidence: 99%

A novel network architecture for train-to-wayside communication with quality of service over heterogeneous wireless networks

Pareit

Velde

Naudts

et al. 2012

J Wireless Com Network

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In the railway industry, there are nowadays different actors who would like to send or receive data from the wayside to an onboard device or vice versa. These actors are e.g., the Train Operation Company, the Train Constructing Company, a Content Provider, etc. This requires a communication module on each train and at the wayside. These modules interact with each other over heterogeneous wireless links. This system is referred to as the Train-to-Wayside Communication System (TWCS). While there are already a lot of deployments using a TWCS, the implementation of quality of service, performance enhancing proxies (PEP) and the network mobility functions have not yet been fully integrated in TWCS systems. Therefore, we propose a novel and modular IPv6-enabled TWCS architecture in this article. It jointly tackles these functions and considers their mutual dependencies and relationships. DiffServ is used to differentiate between service classes and priorities. Virtual local area networks are used to differentiate between different service level agreements. In the PEP, we propose to use a distributed TCP accelerator to optimize bandwidth usage. Concerning network mobility, we propose to use the SCTP protocol (with Dynamic Address Reconfiguration and PR-SCTP extensions) to create a tunnel per wireless link, in order to support the reliable transmission of data between the accelerators. We have analyzed different design choices, pinpointed the main implementation challenges and identified candidate solutions for the different modules in the TWCS system. As such, we present an elaborated framework that can be used for prototyping a fully featured TWCS.

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Section: Introductionmentioning

confidence: 99%

A novel network architecture for train-to-wayside communication with quality of service over heterogeneous wireless networks

Pareit

Velde

Naudts

et al. 2012

J Wireless Com Network

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show abstract

“…Multi-antenna and smart antenna techniques are widely used to solve the problems existing in high-speed railway [3]. Since most parts of the carriage of high-speed trains are made of thick metal materials, the direct communication link between users and base stations (eNodeB) will bare the penetration loss of 20-30 dB [4]. Usually, convergence antennas named onboard transceivers will be deployed on top of the carriage to play the role of mobile relay stations.…”

Section: Introductionmentioning

confidence: 99%

Location information-assisted opportunistic beamforming in LTE system for high-speed railway

Cheng

Fang

2012

J Wireless Com Network

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Communication systems of high-speed railway have inherent disadvantages and advantages. The estimation error of direction-of-arrival (DOA) of desired users caused by channel feedback delay and high moving speed make the common beamforming technique of smart antennas work abnormally. Instead, the opportunistic beamforming (OBF) with dumb antennas which does not need channel feedback is proper for high-speed railway. As the system has linear topology, regular movement as well as predictable location and speed information, the OBF can be improved to adapt to this scenario. In this article, conventional OBF is first introduced to the communication systems of high-speed railway. By multiplying random complex on each transmit antenna, the channel fluctuation dynamic range is extended so that multiuser diversity can be exploited. And then location information is employed to assist the conventional one. Communication systems in high-speed railway have the advantage of predictable location and speed information. The improved OBF can perform closer to the performance of coherent beamforming. Numerical analysis and simulation results show that both two algorithms can improve the system performance significantly.

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“…Most of the available work deals with GSM-R [3], which uses a proprietary frequency band (876-880 MHz uplink, 921-925 MHz downlink). GSM-R is a communication system for data and voice based on GSM for European high speed trains using base stations, while the direct train-to-train communication in RCAS is intended to be used in regional networks where the curves are less smooth and the lines are not so straight.…”

Section: Introductionmentioning

confidence: 99%

Channel Model for Train to Train Communication Using the 400 MHz Band

Garcia

Lehner

Strang

et al. 2008

VTC Spring 2008 - IEEE Vehicular Technology Conference

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Abstract-This paper presents a channel model for direct trainto-train communication appropriate for the 400 MHz band. Extrapolation of theoretical and experimental results obtained for the planning of other railway communication systems like GSM-R is not obvious due to the difference in frequencies, antenna height and absence of base stations. In this paper, the analysis of the channel model covers different radio phenomena including path loss, Doppler, fading, and delay spread. Concretely we consider three scenarios (train stations, shunting yards and regional networks), for which the propagation channel characteristics are discussed. Furthermore, influence of special railway environments like cuttings which can be found near cities and towns, tunnels and bridges are encountered.

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Comparison of current solutions for the provision of voice services to passengers on high speed trains

Cited by 28 publications

References 10 publications

A novel network architecture for train-to-wayside communication with quality of service over heterogeneous wireless networks

A novel network architecture for train-to-wayside communication with quality of service over heterogeneous wireless networks

Location information-assisted opportunistic beamforming in LTE system for high-speed railway

Channel Model for Train to Train Communication Using the 400 MHz Band

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