Relaying for IEEE 802.11p at road intersection using a vehicular non-stationary channel model

Xu, Zhinan; Bernadó, Laura; Gan, Mingming; Hofer, Markus; Abbas, Taimoor; Shivaldova, Veronika; Mahler, Kim; Smely, Dieter; Zemen, Thomas

doi:10.1109/wivec.2014.6953256

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…Since this assumption is not always valid in practice, recent research efforts are aiming at the formulation of V2V channel models with non-uniform motion, i.e., assuming acceleration components and non-linear trajectories [33]- [35]. Regarding the propagation environment, some assumptions are made on the distributions of interfering objects for particular scenarios [36]. Conventional approaches consider isotropic or nonisotropic distributions of interfering objects around the vehicles [21].…”

Section: Introductionmentioning

confidence: 99%

Doppler Spectrum Measurement Platform for Narrowband V2V Channels

et al. 2022

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This paper describes the implementation of a Doppler spectrum measurement platform for narrowband frequency-dispersive vehicle-to-vehicle (V2V) channels. The platform is based on a continuous-wave (CW) channel sounding approach widely used for path-loss and large-scale fading measurements, but whose effectiveness to measure the Doppler spectrum of V2V channels is not equally known. This channel sounding method is implemented using general-purpose hardware in a configuration that is easy to replicate and that enables a partial characterization of frequency-dispersive V2V channels at a fraction of the cost of a dedicated channel sounder. The platform was assessed in a series of field experiments that collected empirical data of the instantaneous Doppler spectrum, the mean Doppler shift, the Doppler spread, the path-loss profile, and the large-scale fading distribution of V2V channels under realistic driving conditions. These experiments were conducted in a highway scenario near San Luis Potosí, México, at two different carrier frequencies, one at 760 MHz and the other at 2,500 MHz. The transmitting and receiving vehicles were moving in the same direction at varying speeds, ranging from 20 to 130 km/h and dictated by the unpredictable traffic conditions. The obtained results demonstrate that the presented measurement platform enables the spectral characterization of narrowband V2V channels and the identification of their Doppler signatures in relevant road-safety scenarios, such as those involving overtaking maneuvers and rapid vehicles approaching the transmitter and receiver in the opposite direction.INDEX TERMS Doppler shift, Doppler spectrum, fading channels, radio-frequency propagation, vehicular communications.

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Section: Introductionmentioning

confidence: 99%

Doppler Spectrum Measurement Platform for Narrowband V2V Channels

et al. 2022

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“…A few GSCMs for urban V2V scenarios have been presented in the literature [12]- [14]. In [13] the parameter estimates for highway scenarios in [11] are applied, and the effects of building obstructions are added. The theoretical model in [12] is based on multi-path clusters placed along walls and building corners.…”

Section: Introductionmentioning

confidence: 99%

“…The model supports a frequency range of 5.2-6.2 GHz, and the modelled multi-path channel behavior is validated against measurement results. We extend existing GSCMs [11], [13], by including the effects of i) higher order interactions, ii) obstructions by buildings, foliage and other objects, iii) diffraction around corners, and by iv) prescribing scatterers with a non-isotropic angular gain function.…”

Section: Introductionmentioning

confidence: 99%

The COST IRACON Geometry-Based Stochastic Channel Model for Vehicle-to-Vehicle Communication in Intersections

Gustafson¹,

Mahler

Bolin

et al. 2020

IEEE Trans. Veh. Technol.

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Vehicle-to-vehicle (V2V) wireless communications can improve traffic safety at road intersections and enable congestion avoidance. However, detailed knowledge about the wireless propagation channel is needed for the development and realistic assessment of V2V communication systems. We present a novel geometry-based stochastic MIMO channel model with support for frequencies in the band of 5.2-6.2 GHz. The model is based on extensive high-resolution measurements at different road intersections in the city of Berlin, Germany. We extend existing models, by including the effects of various obstructions, higher order interactions, and by introducing an angular gain function for the scatterers. Scatterer locations have been identified and mapped to measured multi-path trajectories using a measurement-based ray tracing method and a subsequent RANSAC algorithm. The developed model is parameterized, and using the measured propagation paths that have been mapped to scatterer locations, model parameters are estimated. The time variant power fading of individual multi-path components is found to be best modeled by a Gamma process with an exponential autocorrelation. The path coherence distance is estimated to be in the range of 0-2 m. The model is also validated against measurement data, showing that the developed model accurately captures the behavior of the measured channel gain, Doppler spread, and delay spread. This is also the case for intersections that have not been used when estimating model parameters.

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“…In previous works, the dissemination of V2V safety messages was derived for the highway environment [14]. The authors in [15,16] proposed relaying algorithms at intersections. However, less is understood about the performance of the entire V2V communication system, including the drop rate and delivery ratios.…”

Section: Introductionmentioning

confidence: 99%

A Semi-Empirical Performance Study of Two-Hop DSRC Message Relaying at Road Intersections

et al. 2018

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This paper is focused on a vehicle-to-vehicle (V2V) communication system operating at a road intersection, where the communication links can be either line-of-sight (LOS) or non-line-of-sight (NLOS). We present a semi-empirical analysis of the packet delivery ratio of dedicated short-range communication (DSRC) safety messages for both LOS and NLOS scenarios using a commercial transceiver. In a NLOS scenario in which the reception of a safety message may be heavily blocked by concrete buildings, direct communication between the on-board units (OBUs) of vehicles through the IEEE 802.11p standard tends to be unreliable. On the basis of the semi-empirical result of safety message delivery at an intersection, we propose two relaying mechanisms (namely, simple relaying and network-coded relaying) via a road-side unit (RSU) to improve the delivery ratio of safety messages. Specifically, we designed RSU algorithms to optimize the number of relaying messages so as to maximize the message delivery ratio of the entire system in the presence of data packet collisions. Numerical results show that our proposed relaying schemes lead to a significant increase in safety message delivery rates.

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Relaying for IEEE 802.11p at road intersection using a vehicular non-stationary channel model

Cited by 10 publications

References 16 publications

Doppler Spectrum Measurement Platform for Narrowband V2V Channels

Doppler Spectrum Measurement Platform for Narrowband V2V Channels

The COST IRACON Geometry-Based Stochastic Channel Model for Vehicle-to-Vehicle Communication in Intersections

A Semi-Empirical Performance Study of Two-Hop DSRC Message Relaying at Road Intersections

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