TY  - JOUR
T1  - Performance Measurement of a Real-Time Optical Camera Communication System on an Edge Server
AU  - Kim, Tae Hyun 
AU  - Jang, Yeong Min 
JO  - The Journal of Korean Institute of Communications and Information Sciences
PY  - 2025
DA  - 2025/1/1
DO  - 10.7840/kics.2025.50.7.1011
KW  - Optical camera communication
KW  - Edge computing
KW  - Realtime system
KW  - Latency
AB  - Optical camera communication (OCC), a branch of optical wireless communication, provides rapid, energy-efficient, and secure data transmission. This study introduces a real-time OCC performance measurement platform tailored for resource-limited edge devices. The system uses a two-dimensional on-off keying multiple input multiple output (2D OOK-MIMO) modulation technique to decode data from an 8 × 8 LED grid, processed on an edge server without GPU enhancement. Latency is evaluated using timestamp-based delay analysis to measure system performance. The performance measurement results indicate that the 10 Hz flicker rate yields low latency and bit error rates (BERs), thereby enhancing real-time performance. However, the 16 Hz flicker rate increases latency variability and BERs, reducing the dependability of the results without multi-processing programming. By contrast, multiprocessing, which utilizes the entire processor of the edge server, substantially improves the average latency from 94.1 ms to 30.09 ms. This performance improvement is achieved by parallelizing the frame acquisition, object detection, and data decoding stages, allowing the system to handle incoming frames concurrently. Notwithstanding computing resource limitations, the proposed framework sustains real-time performance, facilitating low-latency OCC deployment.