VLC has been accepted as a potential technology for deployment in indoor wireless networks in 5G. Use of efficient link switching scheme among VLC access points is critical in indoor environment to provide seamless connectivity to mobile users. This paper proposes a User Device (UD) based intermittent link switching based on hard link switching. This method is highly suitable for the indoor scenario where most of the fixtures and furniture remains unchanged. A Coordinator is employed in this method, that stores this information, thus, user is not required to search for the best transmitter when RSS is reduced to a threshold value as in conventional methods which cause substantial delay in switching process. Here, coordinator predicts the user position and allots best possible source for that position based on pre-scanned database and transfer the link to new source while releasing the old one by the time user reached that particular position. This method reduces the substantial delay time that occurs in switching process applied in conventional hard link switching. Simulation results show that the proposed scheme for indoor VLC System achieves the dual purpose of adequate illumination and mobility to user in considered indoor scenario.

VLC已被接受为在5G室内无线网络中部署的潜在技术。在室内环境中，在VLC接入点之间使用有效的链路切换方案至关重要，以便为移动用户提供无缝连接。本文提出了一种基于用户设备（UD）的基于硬链接切换的间歇链接切换。此方法非常适合大多数固定装置和家具保持不变的室内场景。在该方法中采用了一个协调器，该协调器存储了该信息，因此，当RSS降低到阈值时，不需要像在传统方法中会导致切换过程大量延迟的用户搜索最佳发送器。这里，协调员根据预先扫描的数据库来预测用户位置并分配该位置的最佳可能来源，并将链接转移到新来源，同时在用户到达该特定位置时释放旧来源。该方法减少了在常规硬链路切换中应用的切换过程中发生的大量延迟时间。仿真结果表明，所提出的室内VLC系统方案在考虑室内场景的情况下达到了为用户提供充足照明和移动性的双重目的。