دانلود رایگان مقاله مدل سازی تاخیر لینک ترافیک دو طرفه در شبکه های وابسته به وسایط نقلیه

Abstract

This paper proposes a modeling of expected link delay (i.e., data delivery delay) on a two-way road segment for carry-and-forward data delivery schemes in vehicular networks. Recently, a lot of vehicles can communicate with each other by dedicated short-range communications (DSRC) for vehicular networking. In the near future, more vehicles will be equipped with DSRC devices because of governmental policies for driving safety. In this paper, we derive a link delay model on a two-way road segment. This link delay model is essential to support multihop infrastructure-to-vehicle or vehicle-to-vehicle data delivery in vehicular networks as disruption tolerant networks. Through simulation, it is shown that our two-way link delay model is more accurate than the legacy two-way link delay model. Furthermore, by applying our model to data unicasting, we show that our model is precise enough to support the efficient data unicasting on vehicular networks.

6. Conclusion

In this paper, we propose a link delay model for a road segment with two-way road traffic and validate our model by applying our model to a data unicasting scheme. In order to derive the expectation of the link delay, we introduce the concept of renewal process. This assumes that the forwarding and carry phases alternate repeatedly. We formulate link delay with the sum of carry delays on a road segment because the carry delay is dominant in the total forward-and-carry delay. Also, we validate our model by comparing expected link delays with simulation results on a road segment and show the performance of E2E delay on a road network. As future work, we will enhance our link delay model in a road segment with a traffic light in a more realistic road traffic simulator.