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A Game-Theoretic Approach for Fair Coexistence Between LTE-U and Wi-Fi Systems.

Authors :
Bairagi, Anupam Kumar
Tran, Nguyen H.
Saad, Walid
Han, Zhu
Hong, Choong Seon
Source :
IEEE Transactions on Vehicular Technology; Jan2019, Vol. 68 Issue 1, p442-455, 14p
Publication Year :
2019

Abstract

LTE over unlicensed band (LTE-U) has emerged as an effective technique to overcome the challenge of spectrum scarcity. Using LTE-U along with advanced techniques such as carrier aggregation, one can boost the performance of existing cellular networks. However, if not properly managed, the use of LTE-U can potentially degrade the performance of co-existing Wi-Fi access points, which operate over the unlicensed frequency bands. Moreover, most of the existing works consider single operator in their proposals. In this paper, an effective coexistence mechanism between LTE-U and Wi-Fi systems is studied. The goal is to enable the cellular network to use LTE-U with CA to meet the quality-of-service (QoS) needs of its users while protecting Wi-Fi access points (WAPs) for a network with multiple operators. In particular, the problem of LTE-U sum-rate maximization is addressed under user QoS and WAP-LTE-U coexistence constraints. To solve this problem, a cooperative Nash bargaining game (NBG) and a one-sided matching game are proposed. Here, the NBG solves the coexistence issue between LTE-U and Wi-Fi system, while the matching game solves the resources allocation problem in the LTE-U system. These two games repeat until convergence. Simulation results show the quality of the proposed approach over other comparing methods in terms of the per-user achieved rate, percentage of unsatisfied users, and fairness. The result also shows that the proposed approach can better protect the performance of Wi-Fi users, compared to the conventional listen-before-talk scheme. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00189545
Volume :
68
Issue :
1
Database :
Complementary Index
Journal :
IEEE Transactions on Vehicular Technology
Publication Type :
Academic Journal
Accession number :
134231649
Full Text :
https://doi.org/10.1109/TVT.2018.2880789