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Accuracy assessment of user micromobility models for THz cellular systems
P. 37–42.
Terahertz (THz, 0.3-3 THz) communications are envisioned as one of the enablers at the air interface for sixth-generation (6G) cellular systems. However, by utilizing large antenna arrays to overcome severe path losses, this system will suffer from micromobility phenomenon manifesting itself in occasional rotations and displacements of user equipment (UE) in the hand of a user. In this paper, based on the measurements of micromobility patterns we propose several models characterized by various degrees of details to capture micromobility patterns of different applications. By utilizing the time to the outage as a metric we compare their accuracy. Our results show that drift to the origin is a critical property that has to be captured by the model. While the two-dimensional Markov model is shown to provide the most accurate approximation, the decomposed Brownian motion model is characterized by the worst match of data. The decomposed one-dimensional Markov model provides the trade-off between simplicity and approximation accuracy
In book
Association for Computing Machinery (ACM), 2021.
Beschastnyi V., Ershova M., Ostrikova D. et al., IEEE Access 2025 Vol. 13 P. 174797–174814
Blockage of propagation paths between the base station (BS) and user equipment (UE), as well as the micromobility of the UE, are known to be critical phenomena affecting the performance of 6G subterahertz/terahertz (sub-THz/THz, 0.1–0.3/0.3–3 THz) cellular systems. The development of functions that target the performance improvement of such systems requires understanding of the dynamics ...
Added: October 21, 2025
Khayrov E., , in: 23rd International Conference, NEW2AN 2023, and 16th Conference, ruSMART 2023, Dubai, United Arab Emirates, December 21–22, 2023, Proceedings, Part II. Internet of Things, Smart Spaces, and Next Generation Networks and Systems. LNCS, volume 14543.: Springer, 2024. Ch. 12 P. 142–154.
The fifth and sixth (5G/6G) generations of cellular systems utilizing the millimeter wave (mmWave, 30–100 GHz) and sub-terahertz (sub-THz, 100–200 GHz) bands are known to be affected by blockage and micromobility phenomena. These effects make the channel highly time-varying in terms of the number of packets that can be serviced in a single scheduling unit. ...
Added: September 18, 2024
Khayrov E., Yevgeni Koucheryavy, IEEE Access 2023 Vol. 11 P. 90383–90395
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 ...
Added: September 11, 2023
E. M. Khayrov, V. A. Prosvirov, Platonova A., , in: Distributed Computer and Communication Networks: Control, Computation, Communications: 25th International Conference, DCCN 2022, Moscow, Russia, September 26–29, 2022, Revised Selected Papers.: Switzerland: Springer, 2022. Ch. 13 P. 161–175.
The introduction of integrated access and backhaul (IAB) technology in beyond 5G systems will result in multiple wireless backhaul links between the user equipment (UE) and the base station (BS). This configuration motivates the research into traffic at the packet level to evaluate the quality of service (QoS) provided to users. At the same time, ...
Added: May 19, 2023
Moltchanov D., Sopin E., Begishev V. et al., IEEE Communications Surveys and Tutorials 2022 Vol. 24 No. 2 P. 1072–1116
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 ...
Added: January 10, 2023
Association for Computing Machinery (ACM), 2021.
n the last decade, major device, communication and networking feats have led to the development and commercialization of millimeter-wave (mmWave) wireless technology. Today, wireless local area networks operating in the Industrial, Scientific and Medical (ISM) 60 GHz frequency band and orchestrated by the IEEE 802.11ad and soon-enough the new IEEE 802.11ay are a reality. Similarly, ...
Added: October 28, 2022
Stepanov N., Moltchanov D., Begishev V. et al., IEEE Transactions on Vehicular Technology 2022 Vol. 71 No. 1 P. 725–738
Terahertz (THz, 0.3!!-!!3 THz) wireless access is nowadays considered as a major enabling technology for sixth generation (6G) cellular systems. To compensate for high propagation losses, these systems will utilize antenna arrays with extremely directional beams. The performance of such systems will thus be heavily affected by micromobility such as shakes and rotations of user ...
Added: October 27, 2022
Sokół J., Kucharek H., Baliukin I. et al., Space Science Reviews 2022 Vol. 218 No. 3 Article 18
Interstellar neutrals (ISNs), pick-up ions (PUIs), and energetic neutral atoms (ENAs) are fundamental constituents of the heliosphere and its interaction with the neighboring interstellar medium. Here, we focus on selected aspects of present-day theory and modeling of these particles. In the last decades, progress in the understanding of the role of PUIs and ENAs for ...
Added: October 27, 2022
McLoone B., Synthese 2020 P. 1–22
A mathematical model in science can be formulated as a counterfactual conditional, with the model’s assumptions in the antecedent and its predictions in the consequent. Interestingly, some of these models appear to have assumptions that are metaphysically impossible. Consider models in ecology that use differential equations to track the dynamics of some population of organisms. ...
Added: October 1, 2020
McLoone B., Philosophy of Science 2019 Vol. 86 No. 4 P. 662–671
Fictionalists believe that scientific models are about model systems that are imaginary. Michael Weisberg has claimed that fictionalism is indefensible because many scientific models are about model systems that are unimaginable. According to a certain account of imagination, what Weisberg says is plausible. According to another, more defensible account of imagination, it is not. I ...
Added: October 2, 2019
Isaeva A. N., Мир психологии. Научно-методический журнал 2018 № 3 С. 49–57
The article is devoted to study implicit aspects of "I" by the hermeneutics of personological models "I". The forms of depersonalization (K. Jaspers), the model of the genesis of personal attitudes and the model of cultural depersonalization (E.B. Starovojtenko) became the material of hermeneutics. "Meta-hermeneutics" (Isaeva, 2008) and "opposition principle" (Isaeva, 2013) were used in ...
Added: July 16, 2018
Kolik A., The Network Industries Quarterly 2016 Vol. 18 No. 4 P. 17–20
The article examines the background and the preconditions of the Russian railway reform. The reform program is analyzed as well as the practical steps towards its implementation. The reform model is compared with those used in other countries. The main achivements of the reform are discussed (industry capitalization, wagon fleet development, attraction of the private ...
Added: January 7, 2017
Lazarev A. A., Arkhipov D. I., , in: 28th Conference of the European Chapter on Combinatorial Optimization.: Катания: University of Catania, 2015. P. 64.
The following classical NP-complete scheduling problem is considered. ...
Added: June 22, 2015
Bronnikov S., Lazarev A. A., Morozov N. et al., , in: 28th Conference of the European Chapter on Combinatorial Optimization.: Катания: University of Catania, 2015. P. 62.
To prepare cosmonauts for the mission on the International Space Station Cosmonaut Training Center must provide trainings for all sorts of the operations and emergencies. All the operations and emergencies combined into sets named onboard systems. ...
Added: June 22, 2015
NY: Wiley-Interscience, 2013.
In a fast changing global economy governed by Enterprise Services and the Future Internet, enterprises and virtual factories will self-organize in distributed, interoperable, innovation Ecosystems where the issues of Enterprise Interoperability need to be solved in a multi-view of information, services and processes throughout Enterprise Networks. ...
Added: December 12, 2013
Bondarenko G.G., Skazochkin A. V., Krutogolov Y. K., Semiconductor Science and Technology 1996 Vol. 11 No. 4 P. 495–501
The effects of varying the ammonia flux on the concentrations of background Si and free carriers and on deep traps for majority and minority carriers in n-GaP layers grown by vapour epitaxy have been studied by secondary ion mass spectrometry and deep level transient spectroscopy. The contribution from the background silicon to the free carrier ...
Added: November 15, 2013
Lukinskiy V., Lukinsky V., Fateeva Nina, , in: Nordic logistics research network conference.: [б.и.], 2012. P. 563–577.
According to various estimates global GDP is about 60-70 trillion dollars, at the same time the costs of logistics in the world accounts for 12 trillion dollars per year. These figures are comparable to costs associated with armaments, public health service and other important areas of human activity.
Consequently, the search of practical ways and development of effective mechanisms for reducing logistics costs is a major problem, the solving of which will improve efficiency and competitiveness of ...
Added: November 8, 2013
[б.и.], 2012.
According to various estimates global GDP is about 60-70 trillion dollars, at the same time the costs of logistics in the world accounts for 12 trillion dollars per year. These figures are comparable to costs associated with armaments, public health service and other important areas of human activity.
Consequently, the search of practical ways and development of effective mechanisms for reducing logistics costs is a major problem, the solving of which will improve efficiency and competitiveness of ...
Added: November 8, 2013
Shalumov A. S., Pershin E. O., M.: PrintLETO.ru, 2013.
The monograph presents results by professor Dr. A. Shalumov’s Research School of Modeling, Information Technology and Automated Systems (Russia). The program, ASONIKA, developed by the school is reviewed here regarding reliability and quality of devices for simulation of electronics and chips during harmonic and random vibration, single and multiple impacts, linear acceleration and acoustic noise, ...
Added: October 13, 2013
Lazarev A. A., Werner F., /. 2008. No. 12.
The scheduling problem of minimizing total tardiness on a single machine is knownto be NP-hard in the ordinary sense. In this paper, we consider the special case of the problem when the processing times $p_j$ and the due dates $d_j$ of the jobs $j, \, j \in N = \{ 1, 2, \ldots, n \}$, ...
Added: March 4, 2013
Lazarev A. A., Werner F., /. 2008. No. 15.
In this paper we consider a graphical realization of dynamic programming. The concept is discussed on the partition and knapsack problems. In contrast to dynamic programming, the new algorithm can also treat problems with non-integer data without necessary transformations of the corresponding problem. We compare the proposed method with existing algorithms for these problems on ...
Added: March 4, 2013