Integrated Frame Coding for Short Burst Transmission in Mobile Visible Light Communication Systems

Recently, visible light communication (VLC) has become a promising option for secure data transmission in industrial Internet of Things (IIoTs). In IIoT-VLC systems, small attocells are adopted to achieve higher spatial reuse rate, and the transmission of data, control and feedback bursts often requires high efficiency and real-time feature. Conventionally, multi-field (MF) frames are used in VLC systems which consists of sync header, channel training sequence, check field, etc. in addition to data payload. However, for short burst transmission, MF frames could result in efficiency loss and latency increase due to useless padding bits. In this paper, a novel coding scheme named integrated frame code (IFC) in physical layer to realize efficient and real-time transmission simultaneously is presented. IFC scheme reduces latency by simplifying transmission procedure and decreases overhead redundancy by integrated design. Specifically, we propose a joint soft-decision criterion for receiving without separate synchronization and channel estimation and then analyze its error performance. After that, we present IFC construction criterion and two design examples. At last, simulation results confirm that for short burst transmission, IFC achieves better efficiency and robustness than MF especially in moving process.