Хоров Евгений Михайлович
Московский институт электроники и математики им. А.Н. Тихонова
Профессиональные интересы
Должности
- Профессор — Московский институт электроники и математики им. А.Н. Тихонова, Кафедра информационной безопасности киберфизических систем
- Заведующий лабораторией — Московский институт электроники и математики им. А.Н. Тихонова, Научно-учебная лаборатория телекоммуникационных систем
Био
- · Начал работать в НИУ ВШЭ в 2017 году.
- · Научно-педагогический стаж: 17 лет.
Образование
- 2022 · Доктор наук: Московский физико-технический институт
- 2013 · Кандидат наук: специальность 05.12.13 «Системы, сети и устройства телекоммуникаций»
- 2010 · Магистратура: Московский физико-технический институт, специальность «Прикладные математика и физика», квалификация «Магистр прикладной математики и физики»
- 2008 · Бакалавриат: Московский физико-технический институт, специальность «Прикладная математика и физика», квалификация «Бакалавр прикладной математики и физики»
Опыт работы
- · 2017: наст. время: Заведующий лабораторией телекоммуникационных систем, Национальный исследовательский университет Высшая школа экономики
- · 2008: наст. время: Заведующий лабораторией беспроводных сетей (ранее: старший научный сотрудник, научный сотрудник, младший научный сотрудник), Институт проблем передачи информации им. А.А. Харкевича РАН
- · 2012: наст. время: Заместитель заведующего кафедрой, доцент (ранее: ассистент) Московский физико-технический институт
- · 2017: наст. время: доцент, Московский университет
- · 2016 – 2017: : Заместитель заведующего лабораторией Интернета вещей (ранее: cтарший научный сотрудник), Cколковский институт науки и технологий
Награды и поощрения
- · Благодарность НИУ ВШЭ (март 2024)
- · Надбавка за публикацию в журнале из Списка А (и приравненном к нему научном издании) (2025–2026, 2024–2025, 2023–2024)
- · Надбавка за публикацию в международном рецензируемом научном издании (2022–2023)
Гранты и проекты
- — · на соискание учёной степени кандидата наук
Конференции (2)
Показать все
- · 2022: 2022 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom) (София). Доклад: Providing High Capacity for AR/VR traffic in 5G Systems with Multi-Connectivity
- · 2021: Infocom. Доклад: SDR-based Testbed for Real-time CQI Prediction for URLLC
Идентификаторы исследователя
- ORCID:
0000-0001-5541-4671 - ResearcherID:
AAF-2331-2019 - SPIN РИНЦ:
3767-1086 - Google Scholar: https://scholar.google.ru/citations?user=Nbk2qQcAAAAJ
- Scopus AuthorID:
34869950000
Публикации (153)
Mathematical Modeling of Joint Operation of Wireless Local Area Networlss and Fifth Generation Cellular Networks
2019 · ARTICLE · en
To improve the performance of LTE cellular networks operating in the licensed frequency spectrum, a new LTE-LAA technology has been developed that allows LTE devices to transmit data in unlicensed frequency bands already used by Wi-Fi devices. The channel access method in LTE-LAA networks, as well as in Wi-Fi networks, is based on the mechanism of carrier sense with collision avoidance; however, LTE-LAA transmission can only begin at the boundary of licensed slots. In this work, we develop a mathematical model for the joint operation of LTE-LAA and Wi-Fi networks, which allows to assess the fairness of the distribution of channel resources between LTE-LAA stations and Wi-Fi stations depending on the duration of the licensed slot, the regulation of which will become possible as part of the New Radio technology of fifth generation cellular networks.
Analytical Study of License-Assisted Access in 5G Networks
2019 · CHAPTER · en
The volume of traffic transmitted over cellular networks is growing significantly every year. To improve LTE network throughput, 3GPP has proposed License-Assisted Access (LTE-LAA), which allows utilizing the unlicensed 5GHz spectrum already used by Wi-Fi and other technologies. To enable fair resource sharing, LTE-LAA adopts CSMA/CA-based channel access with binary exponential backoff similar to Wi-Fi. However, because of the LTE-LAA technology constraints, the LTE-LAA base station may start data transmission only at rather rare licensed carrier slot boundaries. The essential question, what the base station should do between the end of the backoff procedure and the closest licensed slot boundary, is left implementation dependent. In the paper, we have developed analytical models to study the performance of different LTE-LAA implementations and analyze channel sharing fairness between LTE-LAA and Wi-Fi networks in the coexistence scenario. Moreover, we investigate how the performance of LTE-LAA channel access can be improved using New Radio flexible numerology, which is one of the main features of currently developed 5G systems.
New Collision Detection Method for Fair LTE-LAA and Wi-Fi Coexistence
2019 · CHAPTER · en
Growing requirements for cellular network capacity made 3GPP consortium introduce License-Assisted Access (LAA), which implies unlicensed spectrum exploitation. Since these frequencies are already occupied by other technologies, such as Wi-Fi, it is vital to assure fair and efficient sharing of the unlicensed bands by LAA and Wi-Fi devices. Hence, LAA uses Listen Before Talk, the principle of which is similar to CSMA/CA implemented in Wi-Fi. Specifically, similar to Wi-Fi, an LAA base station performs the backoff procedure before every transmission attempt. However, the base station can only start LAA data transmission at licensed spectrum slot boundaries, which results in an extremely long vulnerable period from the end of backoff procedure till the slot boundary. During such a vulnerable period other devices, e.g., Wi-Fi stations, can occupy the channel, canceling the LAA transmission. To protect LAA transmissions, many developers propose sending a reservation signal during the whole vulnerable period, which in turn blocks Wi-Fi stations, occupying the channel with the useless signal and resulting in the channel resource sharing unfairness. To solve this problem, this paper designs a novel mechanism, which allows the LAA base station to detect collisions of Wi-Fi transmissions with the reservation signal. An analytical model for various LAA implementations is developed. Using the model, it is shown how LAA performance can be improved with the proposed mechanism without Wi-Fi performance degradation.
Analysis of YouTube DASH Traffic
2019 · CHAPTER · en
To design efficient resource allocation algorithms that satisfy users' quality of service requirements, it is necessary to know or correctly estimate the traffic characteristics. In recent years, the share of video streams in the overall traffic has reached 70% and continues to grow. Most of this type of traffic is generated by popular video hosting services, such as YouTube, NetFlix, and others, which use the Dynamic Adaptive Streaming over HTTP technology. This paper discusses the results of a study on the properties the most popular videos on YouTube, the world's largest video hosting service. In addition, it is shown how traffic parameters depend on the application used to watched Youtube videos and operating systems of PCs and mobile devices.
Enabling the Internet of Things With Wi-Fi Halow—Performance Evaluation of the Restricted Access Window
2019 · ARTICLE · en
IEEE 802.11ah, a new amendment to the Wi-Fi standard, adapts Wi-Fi networks to the emerging Internet of Things (IoT). A key component of .11ah is the Restricted Access Window (RAW), a new channel access mechanism, which reduces contention when even thousands of IoT devices operate in the same area by assigning them different channel times. This paper shows that existing studies incorrectly understand the RAW behavior, oversimplify its modeling and thereby overestimate the real system throughput in several times, especially for short durations of the reserved RAW slots. The core contribution of this paper is a new mathematical model based on a completely different approach, which yields more accurate results and thereby enables better IoT system dimensioning. The developed model is suitable for many scenarios typical for IoT. It allows finding RAW parameters that optimize system performance in terms of throughput, power consumption, and packet loss ratio. The proposed solution is can be used for various traffic patterns: when each device transmits a single packet, a batch of packets of random size, or it has full-buffer traffic.
Scheduling of Dedicated and Shared Links for Fast and Reliable Data Delivery in IEEE 802.15.4 TSCH Networks
2019 · CHAPTER · en
Many industrial Internet of Things scenarios require reliable delivery of time-sensitive information send by a high number of devices. A promising technology for such massive machine-type low-latency communications is the Time-Slotted Channel Hopping (TSCH) operation mode of IEEE 802.15.4. This operation mode allows to schedule both dedicated channel resource units for collision-free transmission and shared channel resource units for random channel access. While numerous existing studies consider either scheduling of dedicated resource units or transmission in the shared ones, the joint usage of both dedicated and shared resource units has not been investigated yet. We fill this gap. We propose two approaches to joint scheduling of shared and dedicated channel resource units and analyze the performance of these approaches in terms of the packet loss ratio taking into account the channel noise. Apart from that, we propose modifications to the standard channel access rules and analyze their performance using an extensive simulation. We show that the proposed approaches with modified channel access rules give extremely low packet loss ratio with respect to the default behavior.
Poster: fast and reliable alert delivery in Wi-Fi HaLow sensor networks
2019 · CHAPTER · en
Rapidly evolving, the Internet of Things poses new challenges for the developers of wireless networks. Various industrial automation, agriculture monitoring, and smart cities scenarios require fast and reliable alert delivery. In many systems, multiple sensors are entrusted to react to the same emergency event. Thus it is enough to receive an alert message from any of these sensors. However, such a message shall be reliably delivered as soon as possible. Recently published Wi-Fi HaLow standard defines the Restricted Access Window (RAW) mechanism that coordinates transmissions of numerous devices and thus can improve reliability and reduce delay. The paper proposes an approach for alert delivery with RAW and investigates how to select optimal RAW parameters, i.e. those parameters that minimize channel time consumption while providing satisfactory reliability and delay for the alert delivery.
Joint Power Control and Time Division to Improve Spectral Efficiency in Dense Wi-Fi Networks
2018 · CHAPTER · en
Ubiquitous densification of wireless networks has brought up the issue of inter- and intra-cell interference. Interference significantly degrades network throughput and leads to unfair channel resource usage, especially in Wi-Fi networks, where even a low interfering signal from a hidden station may cause collisions or block channel access as it is based on carrier sensing. In the paper, we propose a joint power control and channel time scheduling algorithm for such networks, which significantly increases overall network throughput while maintaining fairness. The algorithm is based on branch-and-bound global optimization technique and guarantees that the solution is optimal with user-defined accuracy.
xStream: A New Platform Enabling Communication between Applications and the 5G Network
2018 · CHAPTER · en
Satisfying heterogeneous Quality of Service requirements of different applications in 5G systems requires tight interaction between the network and the applications. Although being pushed to 3GPP, SAND, the most mature solution enabling such interaction and cross-layer optimization for video streaming, has many limitations and drawbacks. This paper fills the gaps found in the SAND specification and enriches its applicability, by introducing a new general platform called xStream. xStream enables communication between various applications and the 5G system and opens the door for many innovative solutions for various types of traffic as well as optimal resource slicing (not only video ones). With extensive simulation, it is shown that xStream provides benefits for both OTT service providers and network operators significantly improving QoE for their customers.
OFDMA Uplink Scheduling in IEEE 802.11ax Networks
2018 · CHAPTER · en
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.
Курсы (3)
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Systems and Networks of Information Transfer · 3 раза
2025/2026, 2024/2025, 2023/2024 · Бакалавриат · Анг
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Проектный семинар
2022/2023 · Бакалавриат · рус
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Основы технологии Wi-Fi
2021/2022 · Магистратура · рус