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On non-saturation regime in IEEE 802.11p based VANET with mobile nodes

In this paper, we investigate the IEEE 802.11p based Vehicular Ad-hoc Network transition between non-saturation and saturation regimes with mobile nodes. We combine vehicular traffic theory, queuing model and Markov chain to evaluate the performance of the network under spatial or networking saturation for mutiple data classes over control and service channels with different transmission rates depending on the vehicle's distance from the roadside unit (RSU). Our results show that the vehicle density growth can result in saturation of wireless medium around the RSU, further resulting in buffer overflows at on board units.