802.11ax WLAN与LTE系统共存环境中的用户分配方案
2023-08-21张闽戴路何玉林曹珂崯顾大环
张闽 戴路 何玉林 曹珂崯 顾大环



摘 要:随着使用智能设备移动用户的爆炸式增长,无线局域网逐渐呈密集部署态势。2021年发布的IEEE802.11ax标准与持续演进的系统长期共存。针对共存环境下用户如何连接网络实现用户吞吐量最大化的问题,提出了吞吐量感知的用户分配方案。该方案将两种网络的性能与用户需求相匹配,并基于实际距离分配用户连接哪个网络。数值分析表明,所提出的方案在吞吐量和能效方面优于已有方案。
关键词:无线局域网;密集部署;持续演进系统;吞吐量
中图分类号:TP393 文献标识码:A 文章编号:2096-4706(2023)12-0070-05
User Allocation Scheme in the Coexistent Environment of 802.11ax WLAN and LTE System
ZHANG Min1, DAI Lu1, HE Yulin1, CAO Keyin2, GU Dahuan3
(1.Jiangsu Vocational College of Finance and Economics, Huaian 223003, China; 2.Jiangsu Vocational College of Electronics and Information, Huaian 223003, China; 3.Jiangsu Dingda Electronics Co., Ltd., Huaian 223200, China)
Abstract: With the explosive growth of mobile users using smart devices, wireless local area networks are gradually becoming intensive deployment. The IEEE802.11ax standard released in 2021 coexists with Continuous Evolution Systems for a long time. A throughput aware user allocation scheme is proposed to address the issue of how users can connect to the network in a coexisting environment to maximize user throughput. This scheme matches the performance of the two networks with user needs and assigns which network the user connects to based on actual distance. Numerical analysis shows that the proposed scheme outperforms existing schemes in terms of throughput and energy efficiency.
Keywords: wireless local area network; intensive deployment; continuous evolution system; throughput
0 引 言
長期演进(Long Term Evolution, LTE)系统旨在为分组交换数据提供一种新的无线接入技术,通过蜂窝基站(Base Station, BS)来完成用户数据的传输。如今,基于IEEE 802.11标准的无线局域网越来越流行,这导致无线局域网的密集部署,从而导致严重的信道竞争和用户性能恶化。IEEE 802.11ax工作组成立于2013年,一直致力于IEEE 802.11ax标准的制定和研发[1],以提高频谱效率和用户性能。IEEE 802.11ax标准已于2021年发布,该标准引入了正交频分多址(Orthogonal Frequency Division Multiple Access, OFDMA)技术来支持上行链路和下行链路中多用户同时传输[2]。
可以预见,IEEE 802.11ax无线局域网(Wireless Local Area Network, WLAN)的密集部署将不可避免地使LTE系统与IEEE 802.11ax WLAN共存。目前,大多数智能手机都有一个以上的无线接口,包括WLAN和LTE蜂窝网络接口,因此带有智能手机的移动用户可以在公共地理区域内连接WLAN或LTE系统,该区域由LTE系统的无线接入网络(Radio Access Network, RAN)中的BS和WLAN中的接入点(Access Point, AP)覆盖。其中,RAN负责与用户设备(User Equipment, UE)进行数据交换。下文将IEEE 802.11ax WLAN与LTE系统共同覆盖的地理区域称为“共存区域”。……
