Repetition-based broadcast in vehicular ad hoc networks in Rician channel with capture

In this paper we study the performance of different vehicular wireless broadcast schemes that rely on repetition as a means for providing reliable communications in Rician environment with capture effect. We investigate different patterns for retransmission and show that the one based on Optical Orthogonal Codes (OOC) performs better than others in terms of probability of success and delay. We propose using different numbers of repetitions for providing different Quality of Service (QoS) priority levels and show this method can effectively provide different QoS classes for different types of data without throughput loss. Probability of success and delay are obtained via simulation for three broadcast schemes in the presence of capture effect in Rician fading environment. Furthermore, analytical solutions are compared to simulation for transmission with no capture as a special case.