Flexible and Reliable UAV-Assisted Backhaul Operation in 5G mmWave Cellular Networks

Moltchanov Dmitri

doi:10.1109/JSAC.2018.2874145

Publications

Article

Flexible and Reliable UAV-Assisted Backhaul Operation in 5G mmWave Cellular Networks

IEEE Journal on Selected Areas in Communications. 2018. Vol. 36. No. 11. P. 2486-2496.

Moltchanov D.

To satisfy the stringent capacity and scalability requirements in the fifth generation (5G) mobile networks, both wireless access and backhaul links are envisioned to exploit millimeter wave (mmWave) spectrum. Here, similar to the design of access links, mmWave backhaul connections must also address many challenges such as multipath propagation and dynamic link blockage, which calls for advanced solutions to improve their reliability. To address these challenges, 3GPP New Radio technology is considering a flexible and reconfigurable backhaul architecture, which includes dynamic link rerouting to alternative paths. In this paper, we investigate the use of aerial relay nodes carried by e.g., unmanned aerial vehicles (UAVs) to allow for such dynamic routing, while mitigating the impact of occlusions on the terrestrial links. This novel concept requires an understanding of mmWave backhaul dynamics that accounts for: 1) realistic 3-D multipath mmWave propagation; 2) dynamic blockage of mmWave backhaul links; and 3) heterogeneous mobility of blockers and UAV-based assisting relays. We contribute the required mathematical framework that captures these phenomena to analyze the mmWave backhaul operation in characteristic urban environments. We also utilize this framework for a new assessment of mmWave backhaul performance by studying its spatial and temporal characteristics. We finally quantify the benefits of utilizing UAV assistance for more reliable mmWave backhaul. The numerical results are confirmed with 3GPP-calibrated simulations, while the framework itself can aid in the design of robust UAV-assisted backhaul infrastructures in future 5G mmWave cellular.

Research target: Computer Science Electronics and Electrical Engineering

Priority areas: IT and mathematics business informatics engineering science

Language: English

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Keywords: 5G networks and systems millimeter waves UAV performance analysis

Interference and SINR in millimeter wave and terahertz communication systems with blocking and directional antennas

Petrov V., M. Komarov, D. Moltchanov et al. IEEE Transactions on Wireless Communications. 2017. Vol. 16. No. 3. P. 1791-1808.

The fifth generation wireless systems are expected to rely on a large number of small cells to massively offload traffic from the cellular and even from the wireless local area networks. To enable this functionality, mm-wave (EHF) and Terahertz (THF) bands are being actively explored. These bands are characterized by unique propagation properties compared with microwave systems. As a result, the interference structure in these systems could be principally different to what we observed so far at lower frequencies. In this paper, using the tools of stochastic geometry, we study the systems operating in the EHF/THF bands by explicitly capturing three phenomena inherent for these frequencies: 1) high directivity of the transmit and receive antennas; 2) molecular absorption; and 3) blocking of high-frequency radiation. We also define and compare two different antenna radiation pattern models. The metrics of interest are the mean interference and the signal-to-interference-plus-noise (SINR) ratio at the receiver. Our results reveal that: 1) for the same total emitted energy by a Poisson field of interferers, both the interference and SINR significantly increase when simultaneously both transmit and receive antennas are directive and 2) blocking has a profound impact on the interference and SINR creating much more favorable conditions for communications compared with no blocking case.

Added: Mar 12, 2018

Системные проблемы надёжности, качества, информационно-телекоммуникационных и электронных технологий в инновационных проектах (ИННОВАТИКА - 2011). Часть 1

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Given a machine $U$, a $c$-short program for $x$ is a string $p$ such that $U(p)=x$ and the length of $p$ is bounded by $c$ + (the length of a shortest program for $x$). We show that for any universal machine, it is possible to compute in polynomial time on input $x$ a list of polynomial size guaranteed to contain a $O(\log |x|)$-short program for $x$. We also show that there exist computable functions that map every $x$ to a list of size $O(|x|^2)$ containing a $O(1)$-short program for $x$ and this is essentially optimal because we prove that such a list must have size $\Omega(|x|^2)$. Finally we show that for some machines, computable lists containing a shortest program must have length $\Omega(2^{|x|})$.

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Kotsemir M. N. In bk.: Proceedings of the 16th International Conference on Scientometrics & Informetrics. Wuhan: International Society for Scientometrics and Informetrics, 2017. P. 136-147.

This study proposes the global bibliometric overview of unmanned aerial vehicles (UAVs) research in Scopus database in 1985 – 2015. This study detects key countries in this field of research as well as the major centers of excellence (organisations) in UAV research. We analyse publication activity of leading countries and organisations as well as the level of citation of their UAV publications. Special section is devoted to the analysis of cross-country collaboration links. For plotting the map of international collaboration in UAV research, VOSviewer software was used.

Added: Oct 24, 2017

System Design and Analysis of UAV-Assisted BLE Wireless Sensor Systems

Komarov M. M., Moltchanov D. In bk.: Wired/Wireless Internet Communications. 14th IFIP WG 6.2 International Conference, WWIC 2016, Thessaloniki, Greece, May 25-27, 2016, Proceedings. Iss. 9674. Springer, 2016. P. 284-296.

Inefficiency of wireless sensor networks (WSN) in terms of the network lifetime is one of the major reasons preventing their widespread use. To alleviate this problem different data collection approaches have been proposed. One of the promising techniques is to use unmanned aerial vehicle (UAV). In spite of several papers advocating this approach, there have been no system designs and associated performance evaluation proposed to date. In this paper, we address this issue by proposing a new WSN design, where UAV serves as a sink while Bluetooth low energy (BLE) is used as a communication technology. We analyze the proposed design in terms of the network lifetime and area coverage comparing it with routed WSNs. Our results reveal that the lifetime of the proposed design is approximately two orders of magnitude longer than that of the routed WSNs. Using the tools of integral geometry we show that the density of nodes to cover a certain area is approximately two times more for routed WSNs compared to our design.

Added: Sep 19, 2016

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Added: Sep 27, 2018

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A model for organizing cargo transportation between two node stations connected by a railway line which contains a certain number of intermediate stations is considered. The movement of cargo is in one direction. Such a situation may occur, for example, if one of the node stations is located in a region which produce raw material for manufacturing industry located in another region, and there is another node station. The organization of freight traﬃc is performed by means of a number of technologies. These technologies determine the rules for taking on cargo at the initial node station, the rules of interaction between neighboring stations, as well as the rule of distribution of cargo to the ﬁnal node stations. The process of cargo transportation is followed by the set rule of control. For such a model, one must determine possible modes of cargo transportation and describe their properties. This model is described by a ﬁnite-dimensional system of diﬀerential equations with nonlocal linear restrictions. The class of the solution satisfying nonlocal linear restrictions is extremely narrow. It results in the need for the “correct” extension of solutions of a system of diﬀerential equations to a class of quasi-solutions having the distinctive feature of gaps in a countable number of points. It was possible numerically using the Runge–Kutta method of the fourth order to build these quasi-solutions and determine their rate of growth. Let us note that in the technical plan the main complexity consisted in obtaining quasi-solutions satisfying the nonlocal linear restrictions. Furthermore, we investigated the dependence of quasi-solutions and, in particular, sizes of gaps (jumps) of solutions on a number of parameters of the model characterizing a rule of control, technologies for transportation of cargo and intensity of giving of cargo on a node station.

Added: Apr 18, 2017

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Zhilin I., Kreshchuk A., Zyablov V. V. Journal of Communications Technology and Electronics. 2015. Vol. 60. No. 6. P. 695-706.

Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.

Added: Jan 30, 2018

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Event logs collected by modern information and technical systems usually contain enough data for automated process models discovery. A variety of algorithms was developed for process models discovery, conformance checking, log to model alignment, comparison of process models, etc., nevertheless a quick analysis of ad-hoc selected parts of a journal still have not get a full-fledged implementation. This paper describes an ROLAP-based method of multidimensional event logs storage for process mining. The result of the analysis of the journal is visualized as directed graph representing the union of all possible event sequences, ranked by their occurrence probability. Our implementation allows the analyst to discover process models for sublogs defined by ad-hoc selection of criteria and value of occurrence probability

Added: Feb 27, 2014

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The paper presents an outline of the Chinese bond market. It gives an overview of the Chinese bond market history and western research on this topic. The paper also gives a description on the market structure, infrastructure, regulation, participants and trading instruments of the today’s Chinese bond market.

Added: Apr 17, 2013

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Смирнов С. Н., Захаров А. В., Рачков Р. В. и др. Финансовая инженерия, риск-менеджмент и актуарная наука. WP16. Высшая школа экономики, 2007. № WP16/2007/03.

Added: Mar 15, 2013

Handbook of CO₂ in Power Systems

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The Handbook of CO₂ in Power Systems' objective is to include the state-of-the-art developments that occurred in power systems taking CO₂ emission into account. The book includes power systems operation modeling with CO₂ emissions considerations, CO₂ market mechanism modeling, CO₂ regulation policy modeling, carbon price forecasting, and carbon capture modeling. For each of the subjects, at least one article authored by a world specialist on the specific domain is included.

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High field ESR study of the new low dimensional S = ½ system: Cu(NO3)2∙H2O

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