Communication of Mobile Data Dissemination on Vehicular Delay Tolerant Networks

Abstract

Wayside unit of measurement (RSUs), which enable vehicle -to-base Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun communication , are deployed along roadside to handle the ever-growing communication demands caused by explosive increase of vehicular traffics. How to efficiently utilize them to enhance the vehicular delay tolerant network (VDTN) performance are the important problem s in designing RSU-aided VDTNs. In this work, we implement an extensive experiment involving tens of thousands of operational fomite in Beijing city. Based on this newly collected Beijing trace and the existing Shanghai trace, we obtain some invariant properties for communication impinging s of large scale RSU-aided VDTNs. Specifically, we find that the striking time between RSUs and vehicle obeys an exponential distribution , while the contact rate between them follows a Poisson distribution. According to these observance , we investigate the problem of communication contact-aware mobile data retort for RSU-aided VDTNs by considering the mobile data public exposure system that transmits data from the Internet to vehicles via RSUs through opportunistic communications. In particular, we formulate the communication contact-aware RSU-aided vehicular mobile data dissemination problem as an optimization problem with realistic VDTN settings, and we provide an efficient heuristic solution for this Nurse practitioner -hard problem. By carrying out extensive simulation using realistic vehicular traces, we demonstrate the effectualness of our proposed heuristic contact-aware data replication outline , in comparison with the optimal solution and other existing schemes.