Proceedings ArticleDOI
Performance Evaluation of LTE and Wi-Fi Coexistence in Unlicensed Bands
Andre Mendes Cavalcante,Erika Portela Lopes de Almeida,Robson D. Vieira,Fabiano Chaves,Rafael C. D. Paiva,Fuad Mousse Abinader,Sayantan Choudhury,Esa Tuomaala,Klaus Doppler +8 more
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TLDR
A simulator-based system- level analysis in order to assess the network performance in an office scenario shows that LTE system performance is slightly affected by coexistence whereas Wi-Fi is significantly impacted by LTE transmissions.Abstract:
The deployment of modern mobile systems has faced severe challenges due to the current spectrum scarcity. The situation has been further worsened by the development of different wireless technologies and standards that can be used in the same frequency band. Furthermore, the usage of smaller cells (e.g. pico, femto and wireless LAN), coexistence among heterogeneous networks (including amongst different wireless technologies such as LTE and Wi-Fi deployed in the same frequency band) has been a big field of research in the academy and industry. In this paper, we provide a performance evaluation of coexistence between LTE and Wi-Fi systems and show some of the challenges faced by the different technologies. We focus on a simulator-based system- level analysis in order to assess the network performance in an office scenario. Simulation results show that LTE system performance is slightly affected by coexistence whereas Wi-Fi is significantly impacted by LTE transmissions. In coexistence, the Wi-Fi channel is most often blocked by LTE interference, making the Wi-Fi nodes to stay on the LISTEN mode more than 96% of the time. This reflects directly on the Wi-Fi user throughput, that decreases from 70% to ≈100% depending on the scenario. Finally, some of the main issues that limit the LTE/Wi-Fi coexistence and some pointers on the mutual interference management of both the systems are provided.read more
Citations
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Journal ArticleDOI
Towards 1 Gbps/UE in Cellular Systems: Understanding Ultra-Dense Small Cell Deployments
TL;DR: In this paper, the potential gains and limitations of network densification and spectral efficiency enhancement techniques in ultra-dense small cell deployments are analyzed. And the top ten challenges to be addressed to bring ultra dense small-cell deployments to reality are discussed.
Journal ArticleDOI
Enabling the coexistence of LTE and Wi-Fi in unlicensed bands
Fuad Mousse Abinader,Erika Portela Lopes de Almeida,Fabiano Chaves,Andre Mendes Cavalcante,Robson D. Vieira,Rafael C. D. Paiva,Angilberto M. Sobrinho,Sayantan Choudhury,Esa Tuomaala,Klaus Doppler,Vicente A. de Sousa +10 more
TL;DR: The issues that arise from the concurrent operation of LTE and Wi-Fi in the same unlicensed bands from the point of view of radio resource management are discussed and it is shown that Wi-fi is severely impacted by LTE transmissions.
Journal ArticleDOI
Coexistence of LTE-LAA and Wi-Fi on 5 GHz With Corresponding Deployment Scenarios: A Survey
TL;DR: This paper provides a comprehensive survey of the coexistence of LTE-LAA and Wi-Fi on 5 GHz with corresponding deployment scenarios, and explores a relatively smooth technical route for solving coexistence-related problems.
Journal ArticleDOI
5G Communications Race: Pursuit of More Capacity Triggers LTE in Unlicensed Band
TL;DR: This article derives a new adaptive LBT mechanism and and virtualized core network for the best practices in both Wi-Fi and LTE-U technologies to enable coexistence between both technologies using tradeoff performance for fair spectrum sharing.
Journal ArticleDOI
Enabling Technologies for Ultra-Reliable and Low Latency Communications: From PHY and MAC Layer Perspectives
Gordon J. Sutton,Jie Zeng,Ren Ping Liu,Wei Ni,Diep N. Nguyen,Beeshanga Abewardana Jayawickrama,Xiaojing Huang,Mehran Abolhasan,Zhang Zhang,Eryk Dutkiewicz,Tiejun Lv +10 more
TL;DR: This paper evaluates the relevant PHY and MAC techniques for their ability to improve the reliability and reduce the latency and identifies that enabling long-term evolution to coexist in the unlicensed spectrum is also a potential enabler of URLLC in theUnlicensed band.
References
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Proceedings ArticleDOI
Coexistence of IEEE802.15.4 with other Systems in the 2.4 GHz-ISM-Band
Axel Sikora,Voicu F. Groza +1 more
TL;DR: In this article, the mutual effects of IEEE 802.15.4 and 802.11 in the 2.4 GHz ISM band are examined with real-life equipment, in order to quantify coexistence issues.
Proceedings ArticleDOI
License-exempt LTE deployment in heterogeneous network
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TL;DR: This paper investigates deploying LTE on a license-exempt band as part of the pico-cell underlay and shows that LTE can deliver significant capacity even while sharing the spectrum with WiFi systems.
Proceedings ArticleDOI
Enabling coexistence of heterogeneous wireless systems: case for ZigBee and WiFi
Xinyu Zhang,Kang G. Shin +1 more
TL;DR: An analytical framework is established that relates its key design parameters to performance and cost and demonstrates CBT's significant throughput improvement over the legacy ZigBee protocol, with negligible performance loss to WiFi.
Proceedings ArticleDOI
Harmful Coexistence Between 802.15.4 and 802.11: A Measurement-based Study
TL;DR: This paper examines the listen-before-send performance for heterogeneous networks with substantial measured data and shows that, in many cases, 802.15.4 significantly impacts 802.11 performance.
Proceedings ArticleDOI
Multi-Radio Coexistence: Challenges and Opportunities
TL;DR: The proposed coexistence-aware TXOP adaptation achieves up to 50% improvement of the transmission efficiency in a WiFi/Bluetooth dual-radio device, where the 802.15.2 PTA (packet traffic arbitration) technique is used for coexistence.