VLC Network Design for High Mobility Users in Urban Tunnels

Area of Science:

• Intelligent Transportation Systems (ITS)
• Wireless Communication Networks
• Optical Wireless Communication

Background:

• Vehicular systems require real-time data for safety and security.
• Visible Light Communication (VLC) offers a low-cost, simple wireless access method for ITS.
• Existing VLC networks face challenges with limited coverage and high vehicle speeds, causing handover failures.

Purpose of the Study:

• To design a vehicular VLC network supporting high-mobility users.
• To address challenges of limited coverage and time-limited links in vehicular VLC.
• To enhance uplink reliability and enable seamless mobility in vehicular VLC networks.

Main Methods:

• Modified traditional VLC network topology to improve uplink reliability.
• Developed and proposed a low-latency handover scheme for vehicular VLC.
• Validated the network design using system-level simulations in a vehicular tunnel scenario.

Main Results:

• The proposed method ensures a steady connection, with vehicular nodes available over 99% of the time.
• Connection stability is maintained regardless of the number of vehicular nodes.
• Achieved a Frame-Error-Rate (FER) below 10^-3, demonstrating high communication reliability.

Conclusions:

• The designed vehicular VLC network effectively supports high-mobility users.
• The low-latency handover scheme overcomes limitations of existing VLC handover procedures.
• The system provides robust and reliable wireless communication for intelligent transportation.