A Study on Teletraffic Congestion Control of Inter-Vehicle Communication using Packet Priority

In IVC (inter-vehicle communication) systems, under the situation where communication traffic goes into crowded owing to increase in density of vehicles and IVC traffic, required communication traffic may exceed communication resources. This situation leads to unstable communication. In the communication assumed in IVC systems, both the high priority communication which demands urgent transmission such as incident and rapid braking information and the low priority communication which does not demand urgent transmission comparatively such as mid-level message and entertainment information exist together. In fact, the communication system that treats multi-level priorities is assumed. If these communication models are assumed, the situation where information with high priority is buried in information with low priority is fatal problem. As the result, improvement of safety, which is the most important purpose of IVC systems, may be harmed. Therefore, in this paper, the method that the throughput of information with high priority which requires urgent transmission is not sacrificed even if the load of teletraffic increases is proposed and its performance is evaluated