Statistical Analysis and Modeling of User Micromobility for THz Cellular Communications

Stepanov, Nikita; Moltchanov, Dmitri; Begishev, Vyacheslav; Turlikov, Andrey; Koucheryavy, Yevgeni

doi:10.1109/tvt.2021.3124870

Cited by 19 publications

(13 citation statements)

References 24 publications

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“…Both mmWave and THz need to utilize directional antenna arrays in beamforming regime to overcome severe propagation losses and improve the signal quality at the receiver as a result of higher transmit and receive gains [6], [116]. This feature naturally requires beamsearching procedure for both systems and makes both bands sensitive to outages caused by micromobility [117], [118]. Higher than microwave frequencies are both affect by blockage phenomenon although the magnitude of impact is different.…”

Section: A Performance Evaluation Specifics Of Mmwave/thz Systemsmentioning

confidence: 99%

“…This can be done by, e.g., superposing blockage process on top of micromobility process or abstracting both processes by a certain stochastic process with the joint intensity of link interruptions. Additional attempts have been done recently by the authors in [118], [180] who performed detailed measurements campaigns for different applications and demonstrated that two-dimensional Markov models can accurately capture micromobility when application does not directly control user's behavior, e.g., video/VR viewing.…”

Section: G Ue Micromobility Modelsmentioning

confidence: 99%

“…Forcing either blockers or UEs to stationary random locations, one may potentially obtain detailed knowledge of blockage phenomena but looses in the model's ability to capture real-life users behavior. As compared to human body blockage, the nature of micromobility is still not fully studied with just a few recently published studies revealing Markov nature of micromobility for applications that does not control user behavior rejecting this hypothesis for other applications [118], [180].…”

Section: J Summary and Usage Of Modelsmentioning

confidence: 99%

“…For the former class, inherently Markov in nature Brownian motion or discrete two-dimensional empirically fitted models reported in [118] can be utilized without compromising accuracy.…”

Section: J Summary and Usage Of Modelsmentioning

confidence: 99%

See 3 more Smart Citations

A Tutorial on Mathematical Modeling of 5G/6G Millimeter Wave and Terahertz Cellular Systems

Moltchanov

Sopin

Begishev

et al. 2022

IEEE Commun. Surv. Tutorials

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Millimeter wave (mmWave) and terahertz (THz) radio access technologies (RAT) are expected to become a critical part of the future cellular ecosystem providing an abundant amount of bandwidth in areas with high traffic demands. However, extremely directional antenna radiation patterns that need to be utilized at both transmit and receive sides of a link to overcome severe path losses, dynamic blockage of propagation paths by large static and small dynamic objects, macroand micromobility of user equipment (UE) makes provisioning of reliable service over THz/mmWave RATs an extremely complex task. This challenge is further complicated by the type of applications envisioned for these systems inherently requiring guaranteed bitrates at the air interface. This tutorial aims to introduce a versatile mathematical methodology for assessing performance reliability improvement algorithms for mmWave and THz systems. Our methodology accounts for both radio interface specifics as well as service process of sessions at mmWave/THz base stations (BS) and is capable of evaluating the performance of systems with multiconnectivity operation, resource reservation mechanisms, priorities between multiple traffic types having different service requirements. The framework is logically separated into two parts: (i) parameterization part that abstracts the specifics of deployment and radio mechanisms, and (ii) queuing part, accounting for details of the service process at mmWave/THz BSs. The modular decoupled structure of the framework allows for further extensions to advanced service mechanisms in prospective mmWave/THz cellular deployments while keeping the complexity manageable and thus making it attractive for system analysts.

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Section: A Performance Evaluation Specifics Of Mmwave/thz Systemsmentioning

confidence: 99%

Section: G Ue Micromobility Modelsmentioning

confidence: 99%

Section: J Summary and Usage Of Modelsmentioning

confidence: 99%

“…For the former class, inherently Markov in nature Brownian motion or discrete two-dimensional empirically fitted models reported in [118] can be utilized without compromising accuracy.…”

Section: J Summary and Usage Of Modelsmentioning

confidence: 99%

See 2 more Smart Citations

A Tutorial on Mathematical Modeling of 5G/6G Millimeter Wave and Terahertz Cellular Systems

Moltchanov

Sopin

Begishev

et al. 2022

IEEE Commun. Surv. Tutorials

Self Cite

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show abstract

“…In addition to higher free-space propagation losses, THz propagation is also much heavier affected by atmospheric absorption as compared to mmWave band [4]. Finally, by relying upon extremely directional antenna radiation patterns with half-power beamwidth (HPBW) of the main lobe approaching 1 • , these systems may suffer from frequent outages due to UE micromobility [5], [6]. These specifics make THz links highly unreliable requiring natural support from other technologies to ensure session service continuity at the THz air interface.…”

Section: Introductionmentioning

confidence: 99%

User Association and Multi-connectivity Strategies in Joint Terahertz and Millimeter Wave 6G Systems

Sopin¹,

Moltchanov²,

Daraseliya³

et al. 2022

Preprint

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Terahertz (THz) wireless access is considered as a next step towards sixth generation (6G) cellular systems. By utilizing even higher frequency bands than 5G millimeter wave (mmWave) New Radio (NR), they will operate over extreme bandwidth delivering unprecedented rates at the access interface. However, by relying upon pencil-wide beams, these systems will not only inherit mmWave propagation challenges such as blockage phenomenon but introduce their own issues associated with micromobility of user equipment (UE). In this paper, we analyze and compare user association schemes and multiconnectivity strategies for joint 6G THz/mmWave deployments. Differently, from stochastic geometry studies, we develop a unified analytically tractable framework that simultaneously accounts for specifics of THz and mmWave radio part design and traffic service specifics at mmWave and THz base stations (BS). Our results show that (i) for negligible blockers density, λ B ≤ 0.1 bl./m 2 , the operator needs to enlarge the coverage of THz BS by accepting sessions that experience outage in case of blockage (ii) for λ B > 0.1 bl./m 2 , only those sessions that does not experience outage in case of blockage need to be accepted at THz BS, (iii) THz/mmWave multi-connectivity improves the ongoing session loss probability by 0.1 − 0.4 depending on the system parameters.

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Utilization of Machine Learning Algorithms to Identify User Applications

Dugaeva,

Begishev,

Stepanov

2024

Lecture Notes in Computer Science

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Statistical Analysis and Modeling of User Micromobility for THz Cellular Communications

Cited by 19 publications

References 24 publications

A Tutorial on Mathematical Modeling of 5G/6G Millimeter Wave and Terahertz Cellular Systems

A Tutorial on Mathematical Modeling of 5G/6G Millimeter Wave and Terahertz Cellular Systems

User Association and Multi-connectivity Strategies in Joint Terahertz and Millimeter Wave 6G Systems

Utilization of Machine Learning Algorithms to Identify User Applications

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