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OFDMA Uplink Scheduling in IEEE 802.11ax Networks
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 degree depends on rate control, aggregation and other decision-making algorithms implemented at the station, in 11ax networks it is the access point that schedules channel time and specifies transmission parameters for both uplink and downlink. Although OFDMA scheduling in 11ax has much in common with that in cellular networks, e.g. LTE, 11ax has some peculiarities, especially for uplink transmission. Focusing on such peculiarities, in this paper, we investigate the scheduling problem in 11ax, propose a set of schedulers for 11ax, compare their performance and determine the gain achievable by the usage of OFDMA.
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
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
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
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
Tikhonov E., Schneps-Schneppe D., Sneps-Sneppe M., , in: 28th Conference of Open Innovations Association (FRUCT).: [б.и.], 2021. P. 472–481.
The paper explores data delivery delays in next-generation railway communication networks with various configurations of terrestrial and satellite coverage (including mesh and delay-tolerant forwarding). It proposes a rough analytic estimation (with just two parameters: the total number of trains and the average number of their meetings) and computer simulation (based on realistic train schedules). This ...
Added: April 9, 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
Alexander A. Lazarev, Frank Werner, Nikolay Pravdivets, / Series Preprint 09/ 19, FMA, OvGU Magdeburg, 2019, "Preprint 09/ 19, FMA, OvGU Magdeburg, 2019,". 2019.
In this paper, we consider single machine scheduling problems with given release dates and the objective to minimize the maximum penalty which is NP-hard in the strong sense. For this problem, we introduce a dual and an inverse problem and show that both these problems can be solved in polynomial time. Since the dual problem ...
Added: November 29, 2019
Bankov D., Didenko A., Khorov E. et al., , in: 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC).: IEEE, 2017. P. 1–5.
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 ...
Added: October 9, 2018
Orsino A., Ometov A., Fodor G. et al., IEEE Communications Magazine 2017 Vol. 55 No. 2 P. 79–87
mcMTC is starting to play a central role in the industrial Internet of Things ecosystem and have the potential to create high-revenue businesses, including intelligent transportation systems, energy/ smart grid control, public safety services, and high-end wearable applications. Consequently, in the 5G of wireless networks, mcMTC have imposed a wide range of requirements on the ...
Added: March 13, 2018
Bankov D., Khorov E., Lyakhov A. et al., , in: Proceedings of 2017 IEEE International Conference on Communications (ICC).: IEEE, 2017. P. 1167–1173.
In early 2016 Wi-Fi Alliance announced a new technology - Wi-Fi HaLow - which aims to master the raising Internet of Things market with its tremendous number of devices. This technology brings revolutionary changes to Wi-Fi, improving transmission reliability and power efficiency in scenarios with thousands of sensor stations being connected to a single access ...
Added: January 24, 2018
Khorov E., Krasilov A., Malyshev A., , in: Proc. of IEEE/ACM International Symposium on Quality of Service 2017.: [б.и.], 2017. P. 1–6.
In this paper, we consider the problem of radio resource scheduling for Industrial Internet and Tactile Internet. Both paradigms - being revolutionary drivers of 5G - are tightly connected with low-latency communications (i.e. latency of the order of 10 ms or even less). We give an original mathematical statement of the radio resource scheduling problem ...
Added: December 11, 2017