基于象限分割的迟滞软切换VLC-WiFi接入选择算法  

Hysteresis soft-switching VLC-WiFi access selection algorithm based on quadrant partitioning

作　　者：张慧颖[1] 梁士达 李月月 盛美春 马成宇 Zhang Huiying;Liang Shida;Li Yueyue;Sheng Meichun;Ma Chengyu(School of Information and Control Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China)

机构地区：[1]吉林化工学院信息与控制工程学院,吉林132022

出　　处：《电子测量技术》2024年第1期63-70,共8页Electronic Measurement Technology

基　　金：吉林省科技发展计划项目(20220508145RC);吉林化工学院重大科研项目(2021010)资助。

摘　　要：针对解决无线网络频谱匮乏、用户频繁切换问题,本文提出一种基于象限分割的VLC-WiFi异构接入与迟滞软切换算法。依照三维坐标系将室内分割为4部分建立用户速率模型,获取用户速率,建立遮挡模型模拟VLC链路被遮挡情景。用户依据所在位置、象限、遮挡及速率等参数执行接入操作;切换依据迟滞思想将向内切换与向外切换阈值差异化,使切换存在弹性空间从而抑制乒乓效应。在5 m×5 m×5 m室内空间内经过多次实验表明,提出的室内VLC-WiFi异构组网方案水平切换次数降低43.8%,遮挡及垂直切换数降低45.3%,乒乓次数降低52.27%,吞吐量比传统算法提升约5.84%。该算法可以显著降低切换与乒乓次数。因此本文为室内异构网络通信研究提供理论依据。In order to solve the problem of spectrum scarcity and frequent user switching in wireless networks,this paper proposes a VLC-WiFi heterogeneous access and hysteresis soft switching algorithm based on quadrant segmentation.According to the three-dimensional coordinate system,the indoor area is divided into four parts to establish a user rate model,obtain the user rate,and establish an occlusion model to simulate the scenario of VLC link being occluded.Users perform access operations based on parameters such as location,quadrant,occlusion,and speed.Switching differentiates the threshold between inward switching and outward switching based on hysteresis,creating a flexible space for switching and suppressing the ping pong effect.In the 5 m×5 m×5 m indoor space,multiple experiments have shown that the indoor VLC-WiFi heterogeneous networking scheme proposed in this article reduces the number of horizontal switches by 43.8%,the number of occlusion and vertical switches by 45.3%,the number of ping-pong times by 52.27%,and the throughput by about 5.84%compared to traditional algorithms.This algorithm can significantly reduce switching and ping-pong times.Therefore,this article provides a theoretical basis for the study of indoor heterogeneous network communication.

关 键 词：光通信 VLC-WiFi网络 用户分配 乒乓效应 吞吐量 

分 类 号：TN929.12[电子电信—通信与信息系统]