Accuracy assessment of user micromobility models for THz cellular systems

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

doi:10.1145/3477081.3481676

Cited by 13 publications

(4 citation statements)

References 12 publications

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“…Showed that the blockage caused by vehicles leads to a loss of 25 dB to 60 dB over the frequency band of 300 GHz. [158] Proposed several models characterized by various degrees of details to capture micromobility patterns of different applications. Assumed that the user behavior is more regulated as a micro-mobility.…”

Section: B Atmospheric Absorptionmentioning

confidence: 99%

Terahertz Communications and Sensing for 6G and Beyond: A Comprehensive Review

Jiang,

Zhou

et al. 2024

Preprint

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Section: B Atmospheric Absorptionmentioning

confidence: 99%

Terahertz Communications and Sensing for 6G and Beyond: A Comprehensive Review

Jiang,

Zhou

et al. 2024

Preprint

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“…Statistical properties of micromobility processes for different applications including phone calling, gaming, virtual reality, and video watching have been reported in [3]. The authors of [16] compare several candidate models and demonstrate that a two-dimensional Markov model provides the best accuracy.…”

Section: Related Workmentioning

confidence: 99%

Packet Level Performance of 5G NR System Under Blockage and Micromobility Impairments

Khayrov,

Koucheryavy

2023

IEEE Access

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With the introduction of the Integrated Access and Backhaul (IAB) technology by 3GPP, the last mile in beyond 5G cellular systems will be characterized by multiple wireless backhaul links between the user equipment and base station. In such multi-hop configurations, packet latency becomes a dominant factor characterizing the quality of service (QoS) delivered to the users. At the same time, directional communications at millimeter wave (mmWave) frequencies are prone to frequent outages caused by blockage and micromobility leading to periods of silence and subsequent rate compensation. In this paper, we are interested in assessing the impact of mmWave propagation specifics on the delay and medium access control (MAC) buffer overflow performance at a 5G NR IAB network node. To this aim, we first propose a continuous-time Markov chain model for the bitrate provided by such a system that explicitly accounts for mmWave-specific propagation. Then, by formulating a queuing model of packet transmission, we characterize the mean packet delay experienced by a traffic source. Our results illustrate that the mean delay and MAC buffer overflow probability at the NR BS interface is a step function that is not strictly decreasing due to the packet encapsulation specifics of the modulation and coding (MCS) adaptation mechanism. Further, these metrics are non-negligible even for the system having a sufficient amount of resources. For IAB architecture, where the access link may not be available the the mean delay increases exponentially even when the arrival rate is adjusted to the available resources.

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“…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%

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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Accuracy assessment of user micromobility models for THz cellular systems

Cited by 13 publications

References 12 publications

Terahertz Communications and Sensing for 6G and Beyond: A Comprehensive Review

Terahertz Communications and Sensing for 6G and Beyond: A Comprehensive Review

Packet Level Performance of 5G NR System Under Blockage and Micromobility Impairments

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

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