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IEEE 802.11ax uplink scheduler to minimize, delay: A classic problem with new constraints
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In press
In order to meet the continuously increasing demands for high throughput in wireless networks, IEEE 802 LAN/MAN Standard Committee is developing IEEE 802.11ax: a new amendment for the Wi-Fi standard. This amendment provides various ways to improve the efficiency of Wi-Fi. The most revolutionary one is OFDMA. Apart from obvious advantages, such as decreasing overhead for short packet transmission at high rates and improving robustness to frequency selective interference, being used for uplink transmission, OFDMA can increase power spectral density and, consequently, user data rates. However, the gain of OFDMA mainly depends on the resource scheduling between users. The peculiarities of OFDMA implementation in Wi-Fi completely change properties of classic schedulers used in other OFDMA systems, e.g. LTE. In the paper, we consider the usage of OFDMA in Wi-Fi for uplink transmission. We study peculiarities of OFDMA in Wi-Fi, adapt classic schedulers to Wi-Fi, explaining why they do not perform well. Finally we develop a novel scheduler, MUTAX, and evaluate its performance with simulation.
Tiraspolsky S.A., Ermolayev V. T., Flaksman A. G. et al., Radioelectronics and Communications Systems 2011 Vol. 54 P. 219–226
A concept of using MIMO technology in millimeter range wireless communications systems with orthogonal frequency division multiplexing is considered. The concept is based on dividing transmitting and receiving multi-element antenna arrays into separate sub-arrays with analogue radiation pattern shaping and on using two most powerful space sub-channels for information transmission. Sequence and structure of transmitted ...
Added: February 10, 2026
Kirill Glinskiy, Kureev A., Khorov E., IEEE Access 2024 Vol. 12 P. 329–338
A key feature of 5G systems is the Ultra-Reliable Low-Latency Communication (URLLC), which can be used for remote surgery, smart grids, industrial control, etc. URLLC requires millisecond-level delays and very high reliability, i.e., less than 10−5 packet loss probability. The ability to satisfy these very strict quality of service requirements depends on selecting the Modulation and Coding ...
Added: January 17, 2024
Yuryeva M., Lyusin D., Sysoeva T., , in: Когнитивная наука в Москве: новые исследования. Материалы конференции 21–22 июня 2023 г.: М.: «Буки Веди», Московский институт психоанализа, 2023. P. 61–64.
Недавно был опубликован новый эффект (Hatukai, Algom, 2017), связанный с задачей Струпа (Stroop, 1935). Испытуемым предъявляли конгруэнтные и неконгруэнтные стимулы Струпа, но просили реагировать на третий параметр стимулов, не связанный с конфликтом Струпа. Ответы испытуемых были быстрее при предъявлении неконгруэнтных стимулов. Это явление было названо эффект неконгруэнтности со стимулами Струпа (Stroop incongruity effect). Авторы предложили ...
Added: November 13, 2023
Krasilov A., Shamsutdinov A., Shashin A. et al., , in: 2023 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom).: IEEE, 2023. P. 312–317.
Ultra-Reliable Low-Latency Communications (URLLC) is a new type of service supported in 5G systems, which imposes very strict requirements on packet delivery time and reliability. Many URLLC applications generate sporadic traffic in the uplink. To satisfy strict URLLC requirements for such a type of traffic, a 5G base station can use the Grant-Free channel access ...
Added: November 8, 2023
Britov I., Вьетнамские исследования (Российская Федерация) 2023 Т. 7 № 3-2 С. 89–100
The article notes that it is important to pay special attention to prepositions when learning the Vietnamese language, as in Vietnamese grammar they play a significant role and have many features. The author lists and analyses the factors that prevent adequate understanding, use and translation of Vietnamese pretexts by students. These include interference, deviation, semantic ...
Added: October 2, 2023
Vladimir B., Вестник Московского университета. Серия 25: Международные отношения и мировая политика 2018 Т. 10 № 4 С. 79–108
На фоне увеличения числа интернационализированных внутренних конфликтов в последнее время в научной литературе наблюдается устойчивый рост интереса к тематике внешнего вмешательства
в дела суверенных государств. Цель библиографического обзора — обобщить подходы тех ученых, главным образом зарубежных, которые фокусировались на исследовании концептуально-теоретических
аспектов данной проблематики. В структурном плане обзор разделен на три части. В первой раскрыты смысловые нюансы ...
Added: September 13, 2023
Shashin A., Krasilov A., Khorov E., Информационные процессы 2023 Т. 23 № 2 С. 220–230
5G cellular systems provide a new service called Ultra-Reliable Low-Latency Communications (URLLC). In many URLLC scenarios, e.g., in intelligent transport systems, users move at high speed and transmit data in the uplink. The base station shall assign transmission parameters that satisfy the strict quality of service requirements of URLLC applications and consume the least amount ...
Added: July 24, 2023
Shashin A., Belogaev A., Krasilov A. et al., Computer Networks 2023 Vol. 222 Article 109527
Ultra-Reliable Low-Latency Communications (URLLC) is a key service of 5G systems that imposes very strict Quality of Service (QoS) requirements. Typically, URLLC applications require successful delivery of at least 99.999% of packets with a packet delivery time below 1 ms. To satisfy these requirements for uplink URLLC traffic, 5G specifications introduce a grant-free channel access method. ...
Added: July 19, 2023
Korolev N., Ilya Levitsky, Startsev I. et al., IEEE Access 2022 Vol. 10 P. 126339–126351
Native support for multi-link operation is a key novelty of the future Wi-Fi 7 technology defined by the IEEE 802.11be standard, which is currently under development. With the 6 GHz band recently granted for Wi-Fi operation, the novel multi-link feature enables simultaneous usage of multiple wide channels. Thus, it multiplies the capacity of Wi-Fi networks ...
Added: December 22, 2022
Gazizov R., , in: 2022 IEEE 23rd International Conference of Young Professionals in Electron Devices and Materials (EDM).: IEEE, 2022. P. 147–151.
The investigation is dedicated to electromagnetic compatibility, in particular the impact of electrostatic discharge. The study focuses on the real printed circuit board of a spacecraft power supply block which has low sensitivity to the impact of electrostatic discharge. The specific feature of the board is that it is pressed into the metal base. The ...
Added: December 16, 2022
Bobrov E., Kropotov Dmitry, Lu H. et al., IEEE Communications Letters 2022 Vol. 26 No. 4 P. 818–822
IEEEThe paper describes an online deep learning algorithm (ODL) for adaptive modulation and coding in massive MIMO. The algorithm is based on a fully connected neural network, which is initially trained on the output of the traditional algorithm and then incrementally retrained by the service feedback of its output. We show the advantage of our ...
Added: October 26, 2022
Shashin A., Belogaev A., Krasilov A. et al., Информационные процессы 2022 Т. 22 № 2 С. 29–41
Ultra-Reliable Low-Latency Communications (URLLC) is a key service for the fifth generation (5G) cellular systems. Typical requirements for this service are the transmission reliability above 99.999% and the latency below 1 ms. The paper considers a scenario with sporadic URLLC traffic in the uplink. To satisfy the strict latency requirements, User Equipments (UEs) use the ...
Added: October 26, 2022
Shahsin A., Belogaev A., Krasilov A. et al., , in: 2020 International Conference Engineering and Telecommunication (En&T).: IEEE, 2020. P. 1–5.
Added: October 12, 2021
Makarov I., Gorbunova E. S., Frontiers in Psychology 2020 Vol. 11 P. 1–14
Three experiments investigated the role of target-target perceptual similarity within the attentional blink (AB). Various geometric shapes were presented in a rapid serial visual presentation task. Targets could have 2, 1 or 0 shared features. Features included shape and size. The second target was presented after five or six different lags after the first target. ...
Added: November 30, 2020
Ermolaev M. M., Rudnev S. K., Bykov P., RUSSIAN ENGINEERING RESEARCH, USA 2018 Vol. 38 No. 12 P. 916–920
A method is proposed for the analytical calculation of the elastic displacement of a shaft relative to
a bush in joints with interference under the action of radial force and a bending torque. Those displacements
are associated with elastic deformation of the shaft, the bush, and the contact layer formed by their rough surfaces.
On the basis of ...
Added: November 29, 2019
M. V. Fedorov, Sysoeva A. A., Vintskevich S. V. et al., Physical Review A: Atomic, Molecular, and Optical physics 2018 Vol. 98 P. 013850-1–013850-12
We consider regimes of Spontaneous Parametric Down-Conversion both noncollinear and nondegenerate in frequencies. Parameters characterizing degrees of noncollinearity and of nondgeneracy are defined, and they are shown to be not independent of each other. At a given degree of nondegeneracy the emitted photons are shown to propagate along two different cones opening angles of which ...
Added: November 2, 2018
Bankov D., Didenko A., Khorov E. et al., , in: Proceedings of 2018 IEEE International Conference on Communications (ICC).: IEEE, 2018. P. 1–6.
In the modern world, a high-speed wireless Internet connection is a necessity rather than a luxury. To improve the efficiency of Wi-Fi networks in dense deployment, a novel amendment to the Wi-Fi standard, namely IEEE 802.11ax introduces Orthogonal frequency-division multiple access (OFDMA). In contrast to legacy Wi-Fi, where performance of a station to a considerable ...
Added: October 9, 2018