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
Fair Coexistence of Scheduled and Random Access Wireless Networks: Unlicensed LTE/WiFi
TL;DR: In this article, the fair coexistence of scheduled and random access transmitters sharing the same frequency channel is studied and the joint proportional fair rate allocation is derived, which casts useful light on current LTE/WiFi discussions.
Proceedings ArticleDOI
Modeling the coexistence of LTE and WiFi heterogeneous networks in dense deployment scenarios
TL;DR: A analytical framework for interference characterization of WiFi and LTE for dense deployment scenarios with spatially overlapping coverage is provided and results are presented showing 4-5x gains in system capacity over comparable no coordination cases.
Journal ArticleDOI
QoE-Enabled Unlicensed Spectrum Sharing in 5G: A Game-Theoretic Approach
TL;DR: Simulation results show that the proposed approach can better protect the performance of Wi-Fi users compared to the conventional listen-before-talk scheme and the stability of VCFG and optimal sharing time are proved.
Proceedings ArticleDOI
Performance Analysis of LAA and WiFi Coexistence in Unlicensed Spectrum Based on Markov Chain
Yuan Gao,Xiaoli Chu,Jie Zhang +2 more
TL;DR: This paper presents a new framework to evaluate the downlink performance of coexisting LAA and WiFi networks, and shows that throughput of a WiFi network can be enhanced by adding or replacing WiFi access points with LAA E-UTRAN Node Bs, at the expense of different levels of WiFi performance degradation.
Proceedings ArticleDOI
Extending LTE to unlicensed band - Merit and coexistence
TL;DR: The results include evaluation and lab data that demonstrate how the technology provide benefit to surrounding Wi-Fi deployment and contribute towards enhancing spectral efficiency of the unlicensed band.
References
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Proceedings ArticleDOI
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Preben Mogensen,Wei Na,Istvan Z. Kovacs,Frank Frederiksen,A. Pokhariyal,Klaus I. Pedersen,Troels Kolding,Klaus Hugl,Markku Kuusela +8 more
TL;DR: An adjusted Shannon capacity formula is introduced, where it is shown that the bandwidth efficiency can be calculated based on system parameters, while the SNR efficiency is extracted from detailed link level studies.
Proceedings ArticleDOI
Enabling LTE/WiFi coexistence by LTE blank subframe allocation
Erika Portela Lopes de Almeida,Andre Mendes Cavalcante,Rafael C. D. Paiva,Fabiano Chaves,Fuad Mousse Abinader,Robson D. Vieira,Sayantan Choudhury,Esa Tuomaala,Klaus Doppler +8 more
TL;DR: This paper considers two of the most prominent wireless technologies available today, namely Long Term Evolution (LTE), and WiFi, and addresses some problems that arise from their coexistence in the same band, and proposes a simple coexistence scheme that reuses the concept of almost blank subframes in LTE.
Proceedings ArticleDOI
Understanding and mitigating the impact of RF interference on 802.11 networks
TL;DR: A channel hopping design is prototype using PRISM NICs, and it is found that it can sustain throughput at levels of RF interference well above that needed to disrupt unmodified links, and at a reasonable cost in terms of switching overheads.