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Study on a method to improve the efficiency of vehicular networks

With continuously increasing in the number of vehicles on the road and massive traffic jam, more and more attentions have been paid to vehicular networks, which try to enable roads to be safer and make traffic efficiency higher. Dedicated short-range communication (DSRC) is considered a general standard for Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication. Long term evolution (LTE) can also provide various applications for vehicular users. However, they have respective advantages and also have respective disadvantages when they are applied to Vehicular Networks (VNs) respectively. DSRC can be implemented in a simple and practical way, but the packet delivery ratio would drop dramatically when the numbers of vehicles increase. LTE has the characters of high coverage and flexible bandwidth allocation of resource, while it is not designed specifically for VNs. In this paper, a heterogeneous vehicular network is put forward, which integrates DSRC and LTE, and takes full advantages of their respective characteristics. In addition, a new method is presented to improve the efficiency of the heterogeneous vehicular network.