Transmit Power Minimization and Base Station Planning for High-Speed Trains with Multiple Moving Relays in OFDMA Systems

Ghazzai, Hakim; Bouchoucha, Taha; Alsharoa, Ahmad; Yaacoub, Elias; Alouini, Mohamed‐Slim; Al-Naffouri, Tareq Y.

doi:10.1109/tvt.2016.2542344

Cited by 41 publications

(29 citation statements)

References 35 publications

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“…Thus, the problem becomes an assignment problem that is solved by the Hungarian algorithm. It is shown that with the algorithm proposed by the authors in [5], all UEs achieve their target data rate R U…”

Section: Performance Enhancement With Mrs and Intelligent Resourmentioning

confidence: 99%

“…T when the value of R U T is less than 3 Mbps, and more than 95% achieve their target rate when R U T reaches 4 Mbps (assuming all UEs have the same target rate). The proposed algorithm performs the same RB assignment as in the Hungarian algorithm, and then performs an additional optimization on the transmit power to maximize the number of served UEs while minimizing the transmitted power at the MRs (additional details along with the list of simulation parameters can be found in [5]). The iterative algorithm is a lower complexity resource allocation algorithm proposed in [6] and based on equal power allocation.…”

Section: Performance Enhancement With Mrs and Intelligent Resourmentioning

confidence: 99%

“…In [5,6], BSs were considered to be deployed along the track to ensure long range (LR) LOS connectivity to MRs, whereas one MR was deployed per wagon (i.e., several MRs per train), with its outdoor antennas connected to the BS and its indoor antennas serving the UEs inside the wagon, where an indoor short range (SR) communication network is formed, as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

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Untitled ItemEnhanced Connectivity and Energy Efficient Networking for Modern Railways Communication Systems

Yaacoub¹,

Alsharoa²,

Ghazzai³

et al. 2019

Preprint

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<b>To meet the increasing demands for passenger data rates, modern railway communication networks face significant challenges. The advent of 5G communications after the long-term evolution (LTE) and LTE-Advanced (LTE-A) systems provides several technological advances to address these challenges. In this paper, after reviewing the main 5G communication aspects for modern railways, we present methods to ensure connectivity and energy efficiency for the passengers' user equipment (UE) through the use of mobile relays (MRs) on top of the train wagons in conjunction with intelligent resource allocation. Relevant challenges to train connectivity are also presented, and suitable solutions are outlined.</b>

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Section: Performance Enhancement With Mrs and Intelligent Resourmentioning

confidence: 99%

Section: Performance Enhancement With Mrs and Intelligent Resourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Untitled ItemEnhanced Connectivity and Energy Efficient Networking for Modern Railways Communication Systems

Yaacoub¹,

Alsharoa²,

Ghazzai³

et al. 2019

Preprint

Self Cite

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“…To alleviate the issue, for speeds up to pedestrian velocities, prediction based on the past received channel estimates by Wiener or Kalman methods can be used. Nevertheless, these prediction methods become insufficient for vehicular velocities beyond 50 km/h at typical mobile carrier frequencies [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effects of coupling and overspeeding on performance of predictor antenna systems in wireless moving relays

Jamaly

Svensson²,

Derneryd³

2019

IET Microwaves Antenna & Prop

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Using predictor antenna systems for modern wireless moving relays and base stations on top of vehicles such as buses, trains etc. proves to be a reliable approach for collecting channel state information to such fast moving nodes. Recently, it has been shown that coupling between different ports of a multiport antenna system used as a part of a predictor system can reduce the prediction performance. In this study, by integrating position and velocity vectors in the channel covariance matrix as seen at the antenna ports in a rich multipath environment, the authors quantify the impact of antenna coupling on prediction performance. Moreover, practically these predictor systems are designed for a certain target velocity. They further quantify the adverse effect of velocities, different from the target velocity, on prediction performance. In case open-circuit decoupling is necessary, the sensitivity of the predictor antenna system performance with respect to the accuracy of the input network parameters is disclosed.

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“…To make the condition worse, the implementation of HO in LTE-Advanced is a hard HO which requires breaking the radio link with source before connecting with target eNB. Frequent HOs in such traditional networks would increase the network load and power consumption of user equipment (UE), thereby affecting the overall quality of services (QoS) [17]. Group HO, frequent HO at short time intervals, Doppler frequency shift, penetration path loss and fading in propagation characteristics due to shielded carriage of trains, viaduct, hilly terrain and tunnel [18,19] are major concern for system designers in a high-speed scenario.…”

Section: Introductionmentioning

confidence: 99%

A novel handover scheme using torch nodes and adaptive measurement aggregation mechanism to improve QoS in high-speed railway communication

Pramod

Jinaga

2017

J. Mod. Transport.

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Technological advancement in the field of transportation and communication is happening at a faster pace in the past few decades. As the demand for high-speed transportation increases, the need for an improved seamless communication system to handle higher data traffic in a highly mobile environment becomes imperative. This paper proposes a novel scheme to enhance the quality of service in high-speed railway (HSR) communication environment using the concept of torch nodes (TNs) and adaptive measurement aggregation (AMA). The system was modeled using an object-oriented discrete event simulator, and the performance was analyzed against the existing single-antenna scheme. The simulation results show that the proposed scheme with its minimal implementation overhead can efficiently perform seamless handover with reduced handover failure and communication interruption probability.

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Transmit Power Minimization and Base Station Planning for High-Speed Trains with Multiple Moving Relays in OFDMA Systems

Cited by 41 publications

References 35 publications

Untitled ItemEnhanced Connectivity and Energy Efficient Networking for Modern Railways Communication Systems

Untitled ItemEnhanced Connectivity and Energy Efficient Networking for Modern Railways Communication Systems

Effects of coupling and overspeeding on performance of predictor antenna systems in wireless moving relays

A novel handover scheme using torch nodes and adaptive measurement aggregation mechanism to improve QoS in high-speed railway communication

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