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Title: Efficient LTE/WiFi coexistence in unlicensed spectrum using virtual network entity: Optimization and performance analysis
Authors: Dalili Shoaei, Atoosa
Derakhshani, Mahsa
Le-Ngoc, Tho
Issue Date: 2018
Publisher: © IEEE
Citation: DALILI SHOAEI, A., DERAKHSHANI, M. and LE-NGOC, T., 2018. Efficient LTE/WiFi coexistence in unlicensed spectrum using virtual network entity: Optimization and performance analysis. IEEE Transactions on Communications, 66 (6), pp.2617-2629.
Abstract: Long term evolution (LTE) operation in the unlicensed spectrum is a promising solution to address the scarcity of licensed spectrum for cellular networks. Although this approach brings higher capacity for LTE networks, the WiFi performance operating in this band can be significantly degraded. To address this issue, we consider a coordinated structure, in which both networks are controlled by a higher-level network entity. In such a model, LTE users can transmit in the assigned time-slots, while WiFi users can compete with each other by using p-persistent CSMA in their exclusive time-share. In an unsaturated network, at each duty cycle, the TDMA scheduling for LTE users and p values for WiFi users should be efficiently updated by the central controller. The corresponding optimization problem is formulated and an iterative algorithm is developed to find the optimal solution using complementary geometric programming (CGP) and monomial approximations. Aiming to address Quality-ofService (QoS) assurance for LTE users, an upper bound for average delay of these users are obtained. This analysis could be a basis for admission control of LTE users in unlicensed bands. The simulation results reveal the performance gains of the proposed algorithm in preserving the WiFi throughput requirement.
Description: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Version: Accepted for publication
DOI: 10.1109/TCOMM.2018.2801789
URI: https://dspace.lboro.ac.uk/2134/28464
Publisher Link: https://doi.org/10.1109/TCOMM.2018.2801789
ISSN: 0090-6778
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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