室内VLC-WiFi异构网络基于动态载波分配的干扰管理策略

doi:10.12263/DZXB.20210072

电子学报 ›› 2021, Vol. 49 ›› Issue (10): 1920-1926.DOI: 10.12263/DZXB.20210072

所属专题：无线光通信及其组网技术

• 无线光通信及其组网技术 • 上一篇下一篇

室内VLC-WiFi异构网络基于动态载波分配的干扰管理策略

刘焕淋¹, 蒲欣¹, 陈勇², 黄美娜¹, 陈金林¹

^1.重庆邮电大学通信与信息工程学院，重庆 400065
^2.重庆邮电大学自动化学院，重庆 400065

收稿日期:2021-01-06 修回日期:2021-02-24 出版日期:2021-10-25 发布日期:2021-10-25
作者简介:刘焕淋女，1970年生,重庆人.重庆邮电大学教授、博士和硕士生导师.主要研究方向为光通信技术和网络. E-mail:liuhl@cqupt.edu.cn
蒲欣女，1995年生，宁夏固原人.重庆邮电大学硕士研究生.主要研究方向为可见光通信技术. E-mail:727206138@qq.com
陈勇男，1963年生，重庆人.重庆邮电大学教授、硕士生导师.主要研究方向为自动控制和光信号处理.
黄美娜女，1994年生，广东潮州人.重庆邮电大学硕士研究生.主要研究方向为可见光通信技术.
陈金林男，1996年生，江西鹰潭人.重庆邮电大学硕士研究生.主要研究方向为可见光通信技术.
基金资助:
国家自然科学基金(NSFC 61275077);重庆市自然科学基金面上项目(2019 jcyj-msxmX0613)

Interference Management Strategy Based on Dynamic Carrier Allocation for Indoor VLC-WiFi Heterogeneous Network

Huan-lin LIU¹, Xin PU¹, Yong CHEN², Mei-na HUANG¹, Jin-lin CHEN¹

^1.School of Communication and Information Engineering，Chongqing University of Posts and Telecommunications，Chongqing，400065，China
^2.School of Automation，Chongqing University of Posts and Telecommunications，Chongqing，400065，China

Received:2021-01-06 Revised:2021-02-24 Online:2021-10-25 Published:2021-10-25

摘要/Abstract

摘要：

为了有效地管理VLC-WiFi异构网络的小区间干扰，该文设计基于用户中心接入的动态载波分配(DCAUCA)方法，该方法依据用户请求速率构建大小不同的multi-AP小区，对各multi-AP小区依据用户请求速率与网络服务速率的差值降序排列，并依次为各multi-AP小区的VLC AP分配载波.同时，提出基于VLC AP发射功率控制的小区残余干扰抑制(RISPC)策略以进一步优化干扰管理效果.仿真结果表明，DCAUCA方法相较于对比方法最高可提升52.15%的系统吞吐量与7.10%的用户满意度，RISPC策略相较于DCAUCA方法最高可提升9.66%的系统吞吐量.

关键词: VLC-WiFi异构网络, 小区间干扰, 动态载波分配, 干扰管理, 系统吞吐量

Abstract:

In order to manage the inter-cell interference of the visble light communication-wireless fidelity (VLC-WiFi) heterogeneous network effectively, a dynamic carrier allocation method based on user centric access (DCAUCA) was designed in this paper, in which multi-AP cells were constructed for users according to user rates and the differences between user request rate and network service rate of each cell was sorted in descending order for the purpose of allocating carriers to each VLC AP sequentially. Furthermore, a strategy called residual interference suppression based on transmitting power control (RISPC) was proposed to further suppress residual interference. Simulation results show that, compared with the comparison method, the DCAUCA improves system throughput by up to 52.15% and user’s satisfaction by up to 7.10%. Compared with DCAUCA, the RISPC improves system throughput by up to 9.66%.

Key words: VLC-WiFi heterogeneous network, inter-cell interference, dynamic carrier allocation, interference management, system throughput

中图分类号:

TN929.11

刘焕淋, 蒲欣, 陈勇, 黄美娜, 陈金林. 室内VLC-WiFi异构网络基于动态载波分配的干扰管理策略[J]. 电子学报, 2021, 49(10): 1920-1926.

Huan-lin LIU, Xin PU, Yong CHEN, Mei-na HUANG, Jin-lin CHEN. Interference Management Strategy Based on Dynamic Carrier Allocation for Indoor VLC-WiFi Heterogeneous Network[J]. Acta Electronica Sinica, 2021, 49(10): 1920-1926.

图/表 8

图1 室内VLC-WiFi异构网络模型

表1 仿真参数

参数	含义	数值
L×W×H	房间大小	10×10×3m³
h_PD	PD的高度	1.2m
$P j V$	VLC AP j的发射功率	10W
B^V	VLC系统带宽	40MHz
B₀	VLC子载波带宽	1MHz
N	VLC子载波数目	40
N_ap	VLC AP总数目	16
$φ 1 / 2$	发射机的半功率角	60°
T（ψ）	光滤波增益	1
A_PD	PD的接收面积	1cm²
γ	光电转换系数	0.53A/W
P^W	WiFi AP的发射功率	20dBm
B^W	WiFi系统带宽	22MHz

表1 仿真参数

参数	含义	数值
L×W×H	房间大小	10×10×3m³
h_PD	PD的高度	1.2m
$P j V$	VLC AP j的发射功率	10W
B^V	VLC系统带宽	40MHz
B₀	VLC子载波带宽	1MHz
N	VLC子载波数目	40
N_ap	VLC AP总数目	16
$φ 1 / 2$	发射机的半功率角	60°
T（ψ）	光滤波增益	1
A_PD	PD的接收面积	1cm²
γ	光电转换系数	0.53A/W
P^W	WiFi AP的发射功率	20dBm
B^W	WiFi系统带宽	22MHz

图2 不同用户数目的系统吞吐量，ψc = 60°

图3 不同接收机视场角的系统吞吐量，Nu = 25

图4 不同用户数目的平均用户满意度，ψc= 60°

图5 不同接收机视场角的平均用户满意度，Nu = 25

图6 不同用户数目下本文算法的吞吐量对比，ψc = 60°

图7 不同接收机视场角下本文算法的吞吐量对比，Nu = 25

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室内VLC-WiFi异构网络基于动态载波分配的干扰管理策略

Interference Management Strategy Based on Dynamic Carrier Allocation for Indoor VLC-WiFi Heterogeneous Network

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