IEEE 802.11ax UL OFDMA随机接入的性能优化

IF 2.9 3区计算机科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS

Journal of Communications and Networks Pub Date : 2024-12-01 DOI:10.23919/JCN.2024.000069

Pengxue Liu;Yitong Li;Dalong Zhang

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引用次数: 0

摘要

本文对IEEE 802.11ax上行正交频分多址（OFDMA）随机接入（UORA）机制进行了广泛的分析，解决了不同网络负载下信道接入固有的低效率问题。具体来说，开发了一个数学模型来分析802.11ax UORA协议的系统性能，从而能够在饱和和不饱和条件下对稳态工作点进行表征。关键性能指标，包括系统效率和平均接入延迟，导出为稳态工作点的函数。通过适当选择回退参数来优化这些性能指标，并通过仿真结果验证了分析结果。此外，还进一步讨论了接入参数异构性、多链路操作（MLO）和多资源单元（MRU）操作能力对IEEE 802.11ax UORA机制性能的影响。

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Performance optimization of IEEE 802.11ax UL OFDMA random access

This paper presents an extensive analysis of the IEEE 802.11ax uplink orthogonal frequency-division multiple access (OFDMA)-based random access (UORA) mechanism, addressing inherent inefficiencies in channel access under varying network loads. Specifically, a mathematical model is developed to analyze the system performance of the 802.11ax UORA protocol, enabling the characterization of steady-state operating points under both saturated and unsaturated conditions. Key performance metrics, including system efficiency and mean access delay, are derived as functions of the steady-state operating points. Optimization of these performance metrics through the appropriate selection of backoff parameters is explored, with the analysis validated by simulation results. Additionally, the effects of access parameter heterogeneity, multi-link operation (MLO) and multiple resource unit (MRU) operation capabilities on the performance of IEEE 802.11ax UORA mechanism are further discussed.

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来源期刊

Journal of Communications and Networks 工程技术-电信学

CiteScore

6.60

自引率

5.60%

发文量

审稿时长

14.4 months

期刊介绍： The JOURNAL OF COMMUNICATIONS AND NETWORKS is published six times per year, and is committed to publishing high-quality papers that advance the state-of-the-art and practical applications of communications and information networks. Theoretical research contributions presenting new techniques, concepts, or analyses, applied contributions reporting on experiences and experiments, and tutorial expositions of permanent reference value are welcome. The subjects covered by this journal include all topics in communication theory and techniques, communication systems, and information networks. COMMUNICATION THEORY AND SYSTEMS WIRELESS COMMUNICATIONS NETWORKS AND SERVICES.