Impact of LTE Operating in Unlicensed Spectrum on Wi-Fi Using Real Equipment

Maglogiannis, Vasilis; Naudts, Dries; Willemen, Pieter; Moerman, Ingrid

doi:10.1109/glocom.2016.7841884

Cited by 17 publications

(8 citation statements)

References 7 publications

(7 reference statements)

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“…Recently, extensive research has been conducted to assure fair coexistence between LTE and Wi-Fi networks in the unlicensed spectrum. In [7], we performed our first study that investigates the impact of a traditional LTE network operating in unlicensed spectrum on Wi-Fi by using COTS equipment. The obtained results show that the performance of Wi-Fi can be significantly affected by LTE.…”

Section: Related Workmentioning

confidence: 99%

Adaptive CNN-based Private LTE Solution for Fair Coexistence with Wi-Fi in Unlicensed Spectrum

Girmay

Maglogiannis

Naudts

et al. 2020

IEEE INFOCOM 2020 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS)

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Recently, the expansion of wireless network deployments is resulting in increased scarcity of available licensed radio spectrum. As the domain of wireless communications is progressing rapidly, many industries are looking into wireless network solutions that can increase their productivity. Private LTE is a promising wireless network solution as it can be customised independently without the control of a mobile network operator while providing reliable and spectrum efficient services. For this reason, the deployment of Private LTE in the unlicensed spectrum and its coexistence with Wi-Fi is becoming a popular topic in research. In this paper, we propose a coexistence scheme for private LTE network in unlicensed spectrum that enables a fair spectrum sharing with co-located Wi-Fi networks. This is achieved by exploiting various LTE frame configurations consisting of different combinations of downlink, uplink, special subframe and muted subframes. The configuration of a single frame is decided based on a rule based algorithm that exploits Wi-Fi spectrum occupancy statistics that is obtained from a technology recognition system which is based on a Convolutional Neural Network. The performance of the proposed private LTE scheme and its coexistence with Wi-Fi is investigated for different traffic scenarios showcasing how the proposed scheme can lead to a harmless coexistence of LTE and Wi-Fi.

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Section: Related Workmentioning

confidence: 99%

Adaptive CNN-based Private LTE Solution for Fair Coexistence with Wi-Fi in Unlicensed Spectrum

Girmay

Maglogiannis

Naudts

et al. 2020

IEEE INFOCOM 2020 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS)

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“…In our previous work [9], we studied the impact of traditional LTE operating in unlicensed spectrum on Wi-Fi using OffThe-Shelf (OTS) hardware equipment using the LTE testbed of IMEC [10]. In this study, three different levels of LTE signal have been examined, representing different possible levels of LTE impact on Wi-Fi.…”

Section: Related Workmentioning

confidence: 99%

An adaptive LTE listen-before-talk scheme towards a fair coexistence with Wi-Fi in unlicensed spectrum

et al. 2018

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The technological growth combined with the exponential increase of wireless traffic are pushing the wireless community to investigate solutions to maximally exploit the available spectrum. Among the proposed solutions, the operation of Long Term Evolution (LTE) in the unlicensed spectrum (LTE-U) has attracted significant attention. Recently, the 3rd Generation Partnership Project announced specifications that allow LTE to transmit in the unlicensed spectrum using a Listen Before Talk (LBT) procedure, respecting this way the regulator requirements worldwide. However, the proposed standards may cause coexistence issues between LTE and legacy Wi-Fi networks. In this article, it is discussed that a fair coexistence mechanism is needed to guarantee equal channel access opportunities for the co-located networks in a technology-agnostic way, taking into account potential traffic requirements. In order to enable harmonious coexistence and fair spectrum sharing among LTE-U and Wi-Fi, an adaptive LTE-U LBT scheme is presented. This scheme uses a variable LTE transmission opportunity (TXOP) followed by a variable muting period. This way, co-located Wi-Fi networks can exploit the muting period to gain access to the wireless medium. The scheme is studied and evaluated in different compelling scenarios using a simulation platform. The results show that by configuring the LTE-U with the appropriate TXOP and muting period values, the proposed scheme can significantly improve the coexistence among LTE-U and Wi-Fi in a fair manner. Finally, a preliminary algorithm is proposed on how the optimal configuration parameters can be selected towards harmonious and fair coexistence.

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“…In fact, most of the works in literature are focused on simulation and/or mathematical modeling [10-12, 17, 25]. On the other hand, in [22] the performance degradation of Wi-Fi was studied using a testbed when a traditional LTE network operates in the same unlicensed channel. However, a Wi-Fi user oriented performance study using a testbed is unprecedented.…”

Section: Related Workmentioning

confidence: 99%

On the Impact of Duty Cycled LTE-U on Wi-Fi Users: An Experimental Study

Baswade

Atif

Tamma

et al. 2018

Lecture Notes in Computer Science

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The deployment of LTE in unlicensed spectrum is a plausible solution to meet explosive traffic demand from mobile users. However, fair coexistence with the existing unlicensed technologies, mainly Wi-Fi, needs to be ensured before any such deployment. Duty cycled LTE (LTE-U) is a simple and an easily adaptable scheme which helps in fair coexistence with the Wi-Fi. Nonetheless, the immense deployment of Wi-Fi necessitates a user-oriented study to find the effects of LTE-U operation, primarily in scenarios where the LTE-U eNB remains hidden from Wi-Fi Access Point. To delineate these effects, we perform a user-level Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) throughputs study of Wi-Fi in the presence of LTE-U using a testbed. Since, TCP is a more complicated protocol, we analyzed the Congestion Window and Round Trip Time data to comprehend the throughput results. This further explains the unfairness in throughput distribution among Wi-Fi users. Furthermore, we also notice inability among the disadvantaged users to receive the periodic Wi-Fi beacon frames successfully. The reasons and the subsequent consequences of throughput unfairness and beacon losses, are carefully elaborated. Also, to validate the beacon loss results, we present a beacon loss analysis which provides a mathematical expression to find the beacon loss percentage. Finally, we examine the results and highlight a need for incorporating additional functionalities in either LTE-U or Wi-Fi to overcome the present challenges.

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Impact of LTE Operating in Unlicensed Spectrum on Wi-Fi Using Real Equipment

Cited by 17 publications

References 7 publications

Adaptive CNN-based Private LTE Solution for Fair Coexistence with Wi-Fi in Unlicensed Spectrum

Adaptive CNN-based Private LTE Solution for Fair Coexistence with Wi-Fi in Unlicensed Spectrum

An adaptive LTE listen-before-talk scheme towards a fair coexistence with Wi-Fi in unlicensed spectrum

On the Impact of Duty Cycled LTE-U on Wi-Fi Users: An Experimental Study

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