Wireless relay communication on high speed railway: Full duplex or half duplex?

You, Jia; Zhang, Zhong; Dou, Zhongzhao; Dang, Jing; Wang, Gongpu

doi:10.1109/cc.2016.7781714

Cited by 14 publications

(7 citation statements)

References 12 publications

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“…∆D ≥ D thr (13) ∆D < D thr (14) As shown in Figure 11, suppose the positions of two eNodeBs are A and B, namely, the distance d 1 = AB between eNodeBs, and the distance threshold D thr = d/2 between UE and the NCell. AA' is the vertical distance between gNodeB and rail, and AA' = BB'.…”

Section: Location Recognition Of Uementioning

confidence: 99%

“…In order to reduce the delay of the handover of wireless communications, several different approaches have been explored. A simple but effective algorithm of distributed load balancing is presented to reduce the service interruption ratio due to frequent handovers in high-speed scenarios [ 14 ]. Adjusting power in the time domain relieves the “uncertainty” of the received strength of the signal and requires less energy transmission in the procedure of handovers [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Fast Handover Algorithm Based on Location and Weight in 5G-R Wireless Communications for High-Speed Railways

Duan

Xie

et al. 2021

Sensors

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With the booming development of high-speed railways (HSRs), key technologies of wireless communications need to be constantly innovated. In particular, the frontier issue of low delay of the handover for the fifth generation (5G) in fast-moving scenarios has attracted attention from both industry and academia. Based on an analysis of a large number of measured data and the location of the user equipment (UE), a fast handover algorithm is proposed to solve the problem of long delay for a train moving at high speed in a 5G-railway (5G-R). By calculating the speed of a train and its direction of movement, a reasonable handover mode is selected and the handover chain of neighboring cells is identified. The location of the train can be calculated to determine whether UE enters the defined identification zone of pre-handover. Depending on the values collected in the measurement report, the command of the handover is triggered when the weight of the target cell is greater than that of the source cell. Our experimental results show that the delay of the fast handover algorithm is reduced by 2.03%, and the success rate of the handover is increased by 0.42%. Research directions for smart railways are discussed based on these findings.

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Section: Location Recognition Of Uementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fast Handover Algorithm Based on Location and Weight in 5G-R Wireless Communications for High-Speed Railways

Duan

Xie

et al. 2021

Sensors

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“…In [20], the authors proposed FDR with joint antenna relay selection and SI elimination over block Rayleigh fading channels, where an ergodic capacity closed expression form was derived. The authors in [21] introduced the ergodic capacity of FDR for high speed railway using both DF and AF relaying over Rayleigh fading channels and compared its performance with HDR. In [22], the authors analyzed the upper bound ergodic capacity of two-way AF FDR of orthogonal frequency division multiplexing (OFDM) using physical layer network coding (PLNC).…”

Section: Related Workmentioning

confidence: 99%

Ergodic Capacity Analysis of Full Duplex Relaying in the Presence of Co-Channel Interference in V2V Communications

Eshteiwi

Kaddoum

Alam

2020

Sensors

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We analyze the ergodic capacity of a dual-hop full duplex amplify-and-forward (AF) vehicle-to-vehicle (V2V) cooperative relaying system over Nakagami-m fading channels. In this context, the impacts of self-interference (SI) at the relay and co-channel interference (CCI) at the destination are taken into account in this analysis. Precisely, based on the analysis of the moment generating function (MGF) of the signal-to-interference-plus-noise ratio (SINR), new exact and lower bound expressions for the ergodic capacity are derived. The ergodic capacity upper bound is also derived based on the asymptotic outage probability of the approximated SINR. Monte-Carlo simulation results are presented to corroborate the derived analytical results. Our results show the significant impact of the considered interferences on the system performance. It is shown that the ergodic capacity is degraded when the average SI at the relay and/or the average CCI at the destination is increased. This highlights the importance of taking these phenomena into account in the performance evaluation in order to assess the practical limit of full duplex relaying (FDR) cooperative wireless communications. Interestingly, it is also observed that FDR with SI and CCI still shows a higher ergodic capacity than the interference-free half duplex relaying, especially at medium to high signal-to-noise ratios (SNRs).

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“…If the Doppler shift cannot be compensated or there exists a difference between the transmitter oscillator and receiver oscillator, the channels will become time-varying [17][18][19][20][21]. In such cases, time-varying channel estimators can be applied which transfer many channel parameters into a few parameters through basis expansion models (BEMs) [22][23][24], autoregressive models [25,26], array signal processing models [27,28], or exploiting channel sparse feature [21,29].…”

Section: Introductionmentioning

confidence: 99%

Joint Doppler Shift and Channel Estimation for High-Speed Railway Wireless Communications in Tunnel Scenarios

Wang

Zhu

et al. 2022

Wireless Communications and Mobile Computing

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In this work, we study the problem of Doppler shift and channel estimation for wireless communication systems on high-speed railways (HSRs). We focus on tunnel scenario, one of the classical scenarios of HSRs. We first build up the mathematical system model, design a joint Doppler shift and channel estimator, and compare its performance with the typical Moose algorithm. We show that our estimator outperforms the Moose algorithm in Doppler estimation. Besides, since wireless channels in tunnel scenarios often contain several or multiple taps, we suggest an adaptive frame structure to improve transmission efficiency. Simulations are then provided to corroborate our proposed studies.

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Wireless relay communication on high speed railway: Full duplex or half duplex?

Cited by 14 publications

References 12 publications

Fast Handover Algorithm Based on Location and Weight in 5G-R Wireless Communications for High-Speed Railways

Fast Handover Algorithm Based on Location and Weight in 5G-R Wireless Communications for High-Speed Railways

Ergodic Capacity Analysis of Full Duplex Relaying in the Presence of Co-Channel Interference in V2V Communications

Joint Doppler Shift and Channel Estimation for High-Speed Railway Wireless Communications in Tunnel Scenarios

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