Toward Fair Spectrum Sharing: An Enhanced Fixed Waiting Time Model for LAA and Wi-Fi Networks Coexistence

IF 3.4 3区计算机科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Access Pub Date : 2025-04-24 DOI:10.1109/ACCESS.2025.3564136

Moawiah Alhulayil;Miguel López-Benítez;Mohammed Alammar;Abdulrahman Al Ayidh

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Abstract

This study addresses the challenge of fair spectrum sharing in unlicensed bands for Licensed Assisted Access (LAA) and Wi-Fi coexistence. Existing methods, particularly the 3GPP Category 4 Listen Before Talk (Cat 4 LBT) algorithm, fail to fully meet the fairness criteria due to limitations in dynamic Contention Window (CW) adjustments. To improve spectrum efficiency, we propose an Enhanced Fixed Waiting Time (Enhanced FWT) approach, which leverages a theoretical model of Wi-Fi ON periods to determine fixed waiting times for LAA networks. By employing the

$\beta $

distribution to represent Wi-Fi activity more accurately, this model avoids the need for dynamic CW adjustments. Simulation results demonstrate that Enhanced FWT method significantly enhances throughput compared to both the Cat 4 LBT and traditional empirical FWT methods, especially in dense network conditions. This approach, compliant with 3GPP fairness standards, shows promise for robust spectrum sharing, promoting fair LAA/Wi-Fi coexistence in unlicensed bands.

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迈向公平频谱共享：LAA与Wi-Fi共存的增强型固定等待时间模型

本研究解决了在许可辅助接入（LAA）和Wi-Fi共存的非许可频段公平频谱共享的挑战。现有的方法，特别是3GPP第4类先听后讲（Cat 4 LBT）算法，由于动态竞争窗口（CW）调整的限制，不能完全满足公平性标准。为了提高频谱效率，我们提出了一种增强固定等待时间（Enhanced FWT）方法，该方法利用Wi-Fi ON周期的理论模型来确定LAA网络的固定等待时间。通过使用$\beta $分布来更准确地表示Wi-Fi活动，该模型避免了动态CW调整的需要。仿真结果表明，与Cat 4 LBT和传统的经验FWT方法相比，增强FWT方法显著提高了吞吐量，特别是在密集网络条件下。这种方法符合3GPP公平标准，有望实现强大的频谱共享，促进LAA/Wi-Fi在未经许可的频段中公平共存。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Access COMPUTER SCIENCE, INFORMATION SYSTEMSENGIN-ENGINEERING, ELECTRICAL & ELECTRONIC

CiteScore

9.80

自引率

7.70%

发文量

6673

审稿时长

6 weeks

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