A Reliable LoRa-based Vehicle-to-Vehicle Communication System

• Published in: Journal of communications software and systems Vol. 21; no. 4; pp. 414 - 426
• Main Authors: Ameer A. Al-Shammaa, Doaa H. Al-Hadrawi
• Format: Journal Article
• Language: English
• Published: Croatian Communications and Information Society (CCIS) 01.12.2025
• Subjects: finished frame passing; intelligent transport; lora radio; rl-v2v; v2v communication; vanet
• ISSN: 1845-6421; 1846-6079
• DOI: 10.24138/jcomss-2025-0058/

Communication reliability in vehicular networks depends critically on system architecture and wireless technology. This paper develops a reliable LoRa-based vehicle-to-vehicle (RL-V2V) system employing finished frame passing, an innovative method where transmitters broadcast explicit event-termination packets to eliminate idle channel occupancy after event reporting. Our infrastructure-free design uses direct machine-to-machine communication, avoiding LoRaWAN’s gateway dependency. An experimental investigation using vehicular testbeds quantified LoRa’s maximum reliable range under varying parameters: spreading factor (SF), transmission power (TP), packet delivery ratio (PDR), and received signal strength indication (RSSI). Results demonstrate that configuring TP=20 dBm and SF=12 enables communication up to 2.45 km (in low traffic conditions), with RSSI ≥ −77 dBm, ensuring link reliability. The system achieves 71–100% PDR at ≤ 50 km/h, demonstrating 23% superior reliability to LoRaWAN in mobility scenarios. Finished frame passing further reduces channel contention by 37%, enabling efficient channel reuse by other vehicles. While suited for non-latency-critical events (e.g., hazard warnings), the approach tolerates sub-second delays.