Proceedings ArticleDOI
Optimal distributed allocation of almost blank subframes for LTE/WiFi coexistence
Shubhajeet Chatterjee,Mohammad J. Abdel-Rahman,Allen B. MacKenzie +2 more
- pp 1-6
TLDR
An adaptive coexistence scheme between LTE and WiFi is proposed by utilizing almost blank subframes (ABS) over the frame to provide certain quality of service (QoS) guarantees for WiFi traffic while ensuring the performance of its own users.Abstract:
Since LTE in unlicensed spectrum (LTE-U) was proposed by Qualcomm, it has drawn considerable interest because of its potential to increase the capacity of existing LTE networks by utilizing existing infrastructure in the unlicensed band. But, Wi-Fi technology, already operating in the unlicensed 5 GHz band, creates several potential challenges for managing the activities of these two different technologies in the same band. In this context, we propose an adaptive coexistence scheme between LTE and WiFi by utilizing almost blank subframes (ABS). An ABS is an LTE subframe of duration 1 ms (containing two time slots of 0.5 ms duration) with reduced downlink activity. LTE allocates ABSs over 20 MHz channels in 5 GHz band to allow WiFi to access the spectrum. In the proposed coexistence scheme, each LTE cell optimally distributes ABSs over the frame to provide certain quality of service (QoS) guarantees for WiFi traffic while ensuring the performance of its own users.read more
Citations
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Proceedings ArticleDOI
A Machine Learning Algorithm for Unlicensed LTE and WiFi Spectrum Sharing
TL;DR: This work proposes a novel algorithm based on reinforcement learning technique for the problem of opportunistic coexistence of unlicensed LTE and WiFi that takes into account the latency imposed on WiFi activity by employing carrier sensing at the base station, and aims to minimize it, while maximizing un licensed LTE utilization of the idle spectral resources.
Journal ArticleDOI
LTE-U WiFi HetNets: Enabling Spectrum Sharing for 5G/Beyond 5G Systems
TL;DR: In this paper, the authors discuss the technical challenges that hinder the effective utilization of unlicensed bands in LTE-U WiFi HetNets and present a case study for a joint user association and power allocation method with the objective to maximize the sum rate.
Journal ArticleDOI
Coexistence of Cellular and IEEE 802.11 Technologies in Unlicensed Spectrum Bands -A Survey
TL;DR: In this paper, a comprehensive survey on the coexistence of cellular and IEEE 802.11 standards in unlicensed spectrum bands, including 2.4 GHz, 5 GHz, 6 GHz, and 60 GHz, is presented.
Journal ArticleDOI
Minimizing Wi-Fi Latency With Unlicensed LTE Opportunistic White-Space Utilization
TL;DR: An analytical framework to model the temporal characteristics of Wi-Fi channel statistics, particularly, the duration of white spaces resulting from idle periods inWi-Fi traffic is developed and an opportunistic coexistence algorithm is proposed that enables the U-LTE base station to dynamically estimate theduration of upcoming Wi-fi white spaces and determine the U.LTE ON/OFF epochs.
Journal ArticleDOI
An Overview and Mechanism for the Coexistence of 5G NR-U (New Radio Unlicensed) in the Millimeter-Wave Spectrum for Indoor Small Cells
TL;DR: In this paper, a coexistence mechanism for 5G New Radio on Unlicensed (NR-U) small cells located within buildings to coexist with the IEEE 802.11ad/ay, also termed as Wireless Gigabit (WiGig), is presented.
References
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Journal ArticleDOI
Coexistence of Wi-Fi and heterogeneous small cell networks sharing unlicensed spectrum
TL;DR: Simulation results show that the proposed network architecture and interference avoidance schemes can significantly increase the capacity of 4G heterogeneous cellular networks while maintaining the service quality of Wi-Fi systems.
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.
Journal ArticleDOI
Coexistence of Wi-Fi and Cellular With Listen-Before-Talk in Unlicensed Spectrum
TL;DR: The proposed mathematical framework finds the optimal contention window size of cellular base stations, which maximizes the total throughput of both networks while satisfying the required throughput of each network.
Proceedings ArticleDOI
Reinforcement learning for licensed-assisted access of LTE in the unlicensed spectrum
TL;DR: This paper proposes a Q-Learning based dynamic duty cycle selection technique for configuring LTE transmission gaps, so that a satisfactory throughput is maintained both for LTE and WiFi systems, and evaluates the coexistence performance of WiFi and LTE using the proposed technique.
Proceedings ArticleDOI
LTE UL Power Control for the Improvement of LTE/Wi-Fi Coexistence
Fabiano Chaves,Erika Portela Lopes de Almeida,Robson D. Vieira,Andre Mendes Cavalcante,Fuad Mousse Abinader,Sayantan Choudhury,Klaus Doppler +6 more
TL;DR: The proposed LTE UL power control with interference aware power operating point is a flexible tool to deal with the trade-off between LTE and Wi-Fi performances in coexistence since it is able to set different LTE/Wi-Fi coexistence configurations with the choice of a single parameter.
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