室内VLC-WiFi异构无线接入网络研究

Research on Indoor Wireless Access Network of Hybrid VLC-WiFi System

摘要:

对室内VLC-WiFi异构网络进行研究,提出了基本的组网结构及改进的切换策略。根据室内VLC-WiFi异构网络的特点,确定了上下行传输方案,即上行数据使用WiFi链路传输,下行数据使用VLC和WiFi链路传输。当下行VLC链路不可用时,提出了一种基于切换间隔和运动趋势的动态驻留时间算法。仿真结果表明,提出的切换算法与传统算法相比,在不增加乒乓效应的前提下提高了系统的命中率。

Abstract:

The indoor visible light communication and WiFi heterogeneous network is studied, and the basic network structure and improved handover strategy are proposed in this paper. The uplink and downlink transmission scheme is determined according to the characteristics of indoor VLC-WiFi heterogeneous network. The uplink data is transmitted by WiFi channel, while the downlink data is transmitted by both VLC and WiFi channel. When the VLC downlink is not available, a dynamic dwell time handover algorithm is proposed based on handover interval and motion trend. The simulation results show that, comparing the handover algorithm with the conventional one, the matching ratio of the system is advanced without increasing the ping-pong effect.