Analyzing the Impact of TXOP Allocation on Legacy Devices in IEEE 802.11bd Networks

This paper presents a comprehensive analysis of V2X communication, focusing on the transition from IEEE 802.11p to IEEE 802.11bd standards, and introduces an analytical framework combining M/G/1 queuing analysis and Markov chain analysis. Our model includes saturation and non-saturation states of Enhanced Distributed Channel Access (EDCA) in the scenarios with and without fallback mechanism for IEEE 802.11bd Next Generation Vehicles (NGV) and focuses on optimizing Transmission Opportunity (TXOP) allocation for legacy (non-NGV) devices whilst taking into account the impact of vehicle-to-roadside Unit (RSU) distance. Our results show increased throughput for higher-priority traffic classes with augmented TXOP allocation for NGV devices and highlight the need to align RSU transmission coverage with On-Board Unit (OBU) data patterns and vehicle distance to prevent network saturation.