SNB: Reduction of Consecutive Message Reception Failures in C-V2X Communications

• Published in: 2020 IEEE 92nd Vehicular Technology Conference (VTC2020-Fall) pp. 1 - 6
• Main Authors: Park, Taeju, Shin, Kang G.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.11.2020
• Subjects: Resource management; Scheduling; Sensors; Simulation; Vehicle-to-everything; Vehicular and wireless technologies
• ISSN: 2577-2465
• DOI: 10.1109/VTC2020-Fall49728.2020.9348629

Cellular vehicle-to-everything (C-V2X) features have been standardized in 3GPP Release 14. In particular, the standard introduces a fully-distributed resource-allocation algorithm for Mode 4 configuration, called sensing-based semi-persistent scheduling (SB-SPS). Although SB-SPS is effective for orthogonal radio resource allocation, it could easily suffer consecutive message losses caused by interference or half-duplex transmission since SB-SPS uses a selected resource consecutively (multiple times) for periodic transmissions. To mitigate this problem, we propose a novel Mode 4 resource-allocation algorithm, called SNB (Shake-and-Back). Instead of using a selected resource consecutively, SNB either randomly selects and uses a resource each time or uses a selected resource based on its decoding state to avoid consecutive message losses. We have conducted extensive simulations using NS-3 to evaluate SNB considering its coexistence with SB-SPS. Our evaluation results show that SNB improves the average message reception ratio (MRR) at three or more consecutive message losses significantly.