A Seamless Dual-Link Handover Scheme with Optimized Threshold for C/U Plane Network in High-Speed Rail

Xie, Songfan; Yu, Xinchun; Luo, Yuan

doi:10.1109/vtcspring.2016.7504102

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…In fact, in (Xie et al, 2016), a concept similar to MRs is adopted where each train is equipped with two antennas: one at the front and the other at the rear. One antenna might perform a handover while the other is still connected to the initial BS in order to ensure a smooth transition to the users.…”

Section: Handovermentioning

confidence: 99%

Seven Challenges for Communication in Modern Railway Systems

et al. 2021

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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 describe seven main challenges faced by train connectivity, and discuss appropriate solutions. Specifically, we elaborate on techniques for ensuring 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.

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Section: Handovermentioning

confidence: 99%

Seven Challenges for Communication in Modern Railway Systems

et al. 2021

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show abstract

“…In fact, in [11], a concept similar to MRs is adopted where each train is equipped with two antennas: one at the front and the other at the rear. One antenna might perform a handover while the other is still connected to the initial BS in order to ensure a smooth transition to the users.…”

Section: B Handovermentioning

confidence: 99%

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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“…The most commonly used method of overcoming the Doppler shift is Doppler diversity, which can improve the received signal to noise ratio and reduce the bit error rate of the received signal [9]- [11]. The dual-link soft handover [12], [13] and dual-link seamless handover [14], [15] are usually applied to increase the probability of successful handover. In order to obtain the accurate estimation of the fast time-varying channel, [16] proposed a MIMO channel estimation using a special frequency division pilot, which can obtain high precision channel estimation.…”

Section: Introductionmentioning

confidence: 99%

Low-Complexity Beam Selection Scheme for High Speed Railway Communications

Jiang

Zhao

et al. 2020

IEEE Access

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Large-scale multiple input multiple output (MIMO) assisted beamforming based on millimeter waves is an effective way to increase system capacity and data transmission rate for high speed railway (HSR) communication systems. To reduce the number of handovers and improve system throughput, multi-stream beamforming with different beamwidths is used as the transmit beam at the base station (BS). However, when the train moves toward the cell edge, the inter-beam ambiguity (IBA) between multiple beams becomes more and more serious, and the performance of the system will decrease significantly if multiple beams are still activated simultaneously. In order to overcome such difficulty, a low-complexity beam selection scheme based on multi-stream beamforming is proposed in this paper. With this methodology, when the train is in the vicinity of the BS, all beams are activated to achieve the performance of high throughput. Neverthless, when the train moves at the cell edge, only one beam is activated due to the insupportable IBA. The optimal beam switching position could be calculated according to the requirements of the angular resolution. Observing from the theoretical analysis and the simulation results, the proposed scheme can achieve low complementation complexity with high throughput performance. INDEX TERMS High speed railway, large-scale MIMO, millimeter wave, multi-stream beamforming, beam selection.

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A Seamless Dual-Link Handover Scheme with Optimized Threshold for C/U Plane Network in High-Speed Rail

Cited by 10 publications

References 9 publications

Seven Challenges for Communication in Modern Railway Systems

Seven Challenges for Communication in Modern Railway Systems

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

Low-Complexity Beam Selection Scheme for High Speed Railway Communications

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