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
- pp 1-6
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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Proceedings ArticleDOI
A multi-game approach for effective co-existence in unlicensed spectrum between LTE-U system and Wi-Fi access point
TL;DR: Simulation results show that the proposed approach to facilitate the cellular networks to use LTE-U with CA to reduce the gap between achieved rate and quality-of-service (QoS) of the user while protecting Wi-Fi users, considering multiple operators in a dense deployment scenario.
Journal ArticleDOI
E-Fi: Evasive Wi-Fi Measures for Surviving LTE within 5 GHz Unlicensed Band
Carlos Bocanegra,Takai Eddine Kennouche,Zhengnan Li,Lorenzo Favalli,Marco Di Felice,Kaushik R. Chowdhury +5 more
TL;DR: This work argues that the simple use of Almost Blank Subframes within the LTE standard offering short channel access windows overestimates opportunities for Wi-Fi and proposes E-Fi, an interference-evasion mechanism that allowsWi-Fi devices to survive LTE transmissions without any cooperation between these two different standards.
Proceedings ArticleDOI
Co-existence analysis of duty cycle method with Wi-Fi in unlicensed bands
Suna Choi,Seungkeun Park +1 more
TL;DR: In this paper, co-existence performances of duty cycle method with Wi-Fi are analyzed and collisions and latency according to the various DC and DC-on times are investigated.
Proceedings ArticleDOI
LTE/Wi-Fi co-existence under scrutiny: an empirical study
TL;DR: It is shown that co-existence is feasible without modifications to the Wi-Fi stack, if LTE periodically employs "silent" sub-frames; however, optimising the performance of both requires non-trivial tuning of multiple parameters in conjunction with close monitoring ofWi-Fi operation and detection of application-specific requirements.
Journal ArticleDOI
Coalition Formation Game Based Access Point Selection for LTE-U and Wi-Fi Coexistence
TL;DR: An LTE-U and Wi-Fi coexistence mechanism is proposed, and an access point selection algorithm with the aid of coalition formation game is developed for improving the system's throughput.
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
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