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Will MCCA revive wireless multihop networks?
Computer Communications. 2017. Vol. 104. P. 159-174.
Wireless multihop networks (WMNs) are very favorable for many emerging applications, including those connected with public safety, Internet of Things or future Next Generation 60 GHz communication. However, the hidden station problem dramatically degrades efficiency of WMNs and impedes extensive usage of these networks. To eliminate the effect of hidden stations in Wi-Fi mesh networks, the latest version of the IEEE 802.11 standard proposes using deterministic channel access called MCCA. In the paper, we analyze this mechanism, focusing on both already achieved results and open issues.
Ivanov A., Khorov E., Lyakhov A., , in : Proceedings of Global Communication Conference (GlobeCom) 2015, ETFWLAN Workshop. : IEEE, 2015.
To improve Wi-Fi performance in scenarios with high collision probability, recent amendments to the Wi- Fi standard introduce a number of channel access methods based on preliminary channel time reservations. A common feature of these methods is that channel time is reserved in a periodic manner. Unfortunately, having defined a number of channel reservation methods, ...
Added: February 2, 2018
Ivanov A., Khorov E., Занкин В. П., В кн. : Сборник трудов конференции "Информационные Технологии и Системы (ИТиС) 2014". : ИППИ РАН, 2014.
В сетях IEEE 802.11ad наряду с механизмом случайного доступа к каналу используется механизм детерминированного доступа к каналу. Последний заключается в том, что станции запрашивают у центрального устройства SP-резервирование: последовательность интервалов времени, в течение которых только станция, получившая это SP-резервирование, имеет право передавать. Ввиду наличия помех, присущих беспроводной среде, при выборе параметров SP-резервирований необходимо учитывать время ...
Added: January 29, 2018
Dvornikov A. A., Электросвязь 2017 № 5 С. 54-59
Approach to conversion of QoS quota set related to an overlay network to a quota set supported by a wireless sensor network is proposed. The approach allows to design software and hardware that provide services of overlay channels and overlay networks over a wireless sensor network. The main services running on a base network are ...
Added: May 31, 2017
Ivanov A., Khorov E., Lyakhov A., , in : Proceedings of IEEE International Symposium on Wireless Communication Systems (ISWCS) 2015. : IEEE, 2015.
Due to the scarcity of license exempt spectrum at low frequencies, next generation multi-gigabit wireless communication will use 60 GHz. Propagation characteristics make impossible to use omnidirectional high-rate low-power transmission at long distances. As for directional transmission, it cannot be efficient with random channel access while the usage of deterministic one even in the state-of-the-art ...
Added: February 2, 2018
Voskov L., Efremov S. G., Karpov I. V., Качество. Инновации. Образование 2015 № 9 С. 41-47
In this article we discuss the problem of audio data transmission in sensor networks with predefined QoS. We first give a structure of wireless audio sensor networks, their applications and refer to the two existing problems, associated with such networks: low energy efficiency of data transmission and quality of service (QoS). A method of spatial ...
Added: October 31, 2015
Ivanov A., Khorov E., В кн. : Сборник трудов конференции "Информационные Технологии и Системы 2013". : ИППИ РАН, 2013.
Для передачи по mesh-сети трафика, предъявляющего высокие требования к качеству обслуживания, целесообразно использовать описанный в стандарте IEEE 802.11s механизм MCCA детерминированного доступа к среде. При использовании этого механизма станции резервируют для своих передач определенные периодически повторяющиеся моменты времени, тем самым обеспечивая бесконкурентный доступ к каналу связи. Однако, чтобы обеспечить успешную доставку данных в условиях помех, ...
Added: January 29, 2018
Maule M., Moltchanov D., Kustarev P. et al., IEEE Access 2018 Vol. 6 P. 7359-7373
Licensed assisted access (LAA) enables the coexistence of long-term evolution (LTE) and WiFi in unlicensed bands, while potentially offering improved coverage and data rates. However, cooperation with the conventional random-access protocols that employ listen-before-talk (LBT) considerations makes meeting the LTE performance requirements difficult, since delay and throughput guarantees should be delivered. In this paper, we ...
Added: September 11, 2018
Karpov I. V., Качество. Инновации. Образование 2013 № 10 (101) С. 47-52
In this article we review a class of Wireless Sensor Networks (WSNs), which are engaged in the reception, transmission and processing of audio data. Unlike audio sensor networks, where the network is used to collect and analyze audio data, in streaming audio sensor networks we have a problem with energy efficiency and quality of services ...
Added: December 2, 2013
Bilanenko E., Kamzolkina O., Grum-Grzhimaylo A. et al., Fungal Biology 2019 Vol. 123 No. 2 P. 140-150
Exploring life cycles of fungi is insightful for understanding their basic biology and can highlight their ecology. Here, we dissected the sexual and asexual life cycles of the obligate alkalophilic ascomycete Sodiomyces alkalinus that thrives at extremely high pH of soda lakes. Sodiomyces alkalinus develops acremonium-type asexual sporulation, commonly found in ascomycetous fungi. However, the ...
Added: October 3, 2019
Trubochkina N. K., Качество. Инновации. Образование 2010 № 6 С. 55-63
В статье приведены результаты и качественный анализ 2D и 3D моделирования внутреннего и поверхностного p-n переходов с минимальным топологическим размером 20 нм с электрическим воздействием на электроды. Промоделированы 17 основных параметров наноструктур в 2D и 3D реализациях. Выявлены тонкие физические отличия, определены варианты технологической реализуемости. ...
Added: April 19, 2012
M.Yu. Kagan, JETP Letters 2016 Vol. 103 No. 11 P. 728-738
In this short review, we first discuss the results, which are mainly devoted to the generalizations of the famous Kohn–Luttinger mechanism of superconductivity in purely repulsive fermion systems at low electron densities. In the context of repulsive-U Hubbard model and Shubin–Vonsovsky model we consider briefly the superconducting phase diagrams and the symmetries of the order parameter ...
Added: November 18, 2016
Красноярск : ИВМ СО РАН, 2013
Труды Пятой Международной конференции «Системный анализ и информационные технологии» САИТ-2013 (19–25 сентября 2013 г., г.Красноярск, Россия): ...
Added: November 18, 2013
Terekhovich V., Эпистемология и философия науки 2019 Т. 56 № 1 С. 169-184
The framework of simple opposition realism - anti-realism is not enough to analyze the views on the reality of unobservable objects of quantum theory. First, it is necessary to distinguish between realism in relation to the theory and realism in relation to the theory’s objects. Secondly, realism in relation to classical objects can be combined, ...
Added: February 12, 2020
Kardanova E., Loyalka P., Chirikov I. et al., Assessment & Evaluation in Higher Education 2016 Vol. 41 No. 5 P. 770-786
Relatively little is known about differences in the quality of engineering education within and across countries because of the lack of valid instruments that allow for the assessment and comparison of engineering students’ skill gains. The purpose of our study is to develop and validate instruments that can be used to compare student skill gains ...
Added: April 7, 2016
St. Petersburg : [б.и.], 2019
ADMInC'19 is organised by Saint Petersburg Electrotechnical University "LETI" and the IEEE Russia North-West Section to provide a platform sharing findings and new ideas, and discuss problems as well as to provide an effective networking platform for researchers in the field of antenna technology, electromagnetics, antenna measurements and wave propagation. Along with the All-Russia Conference on Antennas and Propagation 2019 (in ...
Added: November 24, 2019
Tumanov M., Глебов Р. С., Антюшин С. С., Промышленные АСУ и контроллеры 2011 № 10 С. 33-38
В статье рассматривается подсистема автоматического интеллектуального управления микроклиматом. Интеллектуальная подсистема позволяет автоматически оценивать состояние микроклимата и управлять системой вентиляции, учитывая нормативные рекомендации по созданию благоприятного микроклимата в обслуживаемом помещении. ...
Added: April 19, 2012
M. : Faculty of Physics, MSU, 2017
The Low Temperature Physics Conference is an international event held every three years, under the auspices of the IUPAP through its Commission C5 on Low Temperature Physics. The aim of these conferences is to exchange information and views among the members of the international scientific community in the general field of Low Temperature Physics. It ...
Added: October 1, 2017
Vishnekov A., Erokhin V., Ivanova E., Датчики и системы 2018 Т. 221 № 1 С. 18-24
The article discusses the recovery of distributed control systems of technical objects. The options for the design of subsystems recovery after hardware or software fault of the sensor system are investigated. The development of an integrated subsystems recovery is proposed on the basis of decision-making system to develop the most rational control actions by ...
Added: January 27, 2018
Stadnikov V., Архитектон: известия вузов 2019 № 2
Historically valuable areas can be both an obstacle for and a stimulus of socio-economic growth depending on ability to use and estimate their potential. The existing practice of area development and management is focused on new construction and reconstruction. Transformation effects are assumed to mean cost benefits from the construction of new floor space in ...
Added: November 15, 2019
Nazirov R., / ИКИ АН СССР. Серия 0 "Препринт ИКИ АН СССР". 1984. № Пр-875.
Added: April 1, 2013
Саратов : IEEE, 2018
В докладах научно-технической конференции нашли отражение результаты теоретических и экспериментальных исследований в области электродинамики и микроволновой техники, микроволновой электроники, наноэлектроники, силовой электроники, полупроводниковой электроники, электроэнергетики, систем измерительной и медицинской техники. Излагаются результаты исследования резонаторных и замедляющих систем, устройств СВЧ, приборов вакуумной, плазменной и микроэлектроники, технологические вопросы изготовления изделий электронной техники. Сборник состоит из двух томов ...
Added: October 16, 2018
М. : National Instruments Russia, 2017
Содержание сборника составляют доклады с результатами оригинальных исследований и технических решений, ранее не публиковавшиеся. Мы надеемся, что предлагаемый сборник окажется полезным для специалистов, работающих в различных областях науки и техники, для широкого круга преподавателей, аспирантов и студентов ВУЗов, а также для преподавателей средних школ и технических колледжей. ...
Added: May 10, 2017
Ivashov E., Kravchenko N., Yagovtsev V. et al., Вестник машиностроения, СТИН 2015 № 9 С. 39-42
The method of multipurpose decision making as a problem of fuzzy programming is considered. For expression of desire levels the method of preferences determination of criteria and achievability assessment is used. ...
Added: October 17, 2015
K. I. Kugel, Bianconi A., Poccia N. et al., Superconductor Science and Technology 2015 Vol. 28 No. 2 P. 024005-1-024005-8
The arrested nanoscale phase separation in a two-band Hubbard model for strongly correlated charge carriers is shown to occur in a particular range in the vicinity of the topological Lifshitz transition, where the Fermi energy crosses the bottom of the narrow band and a new sheet of the Fermi surface related to the charge carriers ...
Added: March 12, 2016