Abstract
The wireless access in vehicular environment system is developed for enhancing the driving safety and comfort of automotive users. However, such system suffers from quality of service degradation for safety applications caused by the channel congestion in scenarios with high vehicle density. In the present work channel congestion is controlled jointly by road side unit, and vehicle. The present work supports vehicle to vehicle communication of authentic safe messages among authentic vehicles only. The road side unit reduces channel congestion by allowing only the authentic vehicles to participate in vehicle to vehicle communication, and by discarding unauthentic messages from the network. It revokes vehicles which are not authentic, and vehicles which are communicating unauthentic messages. Each vehicle also participates in the reduction of channel congestion by varying the size of beacon message dynamically, by removing the duplicate messages from message queue, and also by controlling the transmission power, and transmission range of a message during transmission. It further reduces the channel congestion by controlling the message generation rate using message generation rate control algorithm. Two different message generation rate control algorithm are proposed in the present work. In the first approach it maintains the channel load to an estimated initial value whereas the second approach increases the channel load till the percentage of message loss lies below a predefined threshold. The performance of the proposed scheme is studied on the basis of percentage of successful message reception, and percentage of message loss. The performance of the two message generation rate control algorithms are also compared in the present work.
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Mitra, S., Mondal, A. Joint Congestion Control Strategy During V2V Communication Among Authentic Vehicles in VANET. Wireless Pers Commun 79, 43–67 (2014). https://doi.org/10.1007/s11277-014-1840-x
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DOI: https://doi.org/10.1007/s11277-014-1840-x