As vehicular networks become popular, more and more people want to access data from their vehicles. When many vehicles want to access data through a roadside unit, data scheduling becomes an important issue. In this paper, the authors identify some challenges in vehicle-roadside data access. As vehicles move pretty fast, the requests should be served quickly. Also, vehicles may upload data to the roadside unit, and hence the download and upload requests compete for the same bandwidth. To address these challenges, the authors propose several scheduling schemes. They first propose a basic scheduling scheme called D * S to consider both service deadline and data size. The authors then enhance it by using a single broadcast to serve multiple requests. Finally, they identify the effects of upload requests on data quality, and propose a Two-Step scheduling scheme to provide a balance between serving download and update requests. Simulation results show that the Two-Step scheduling scheme outperforms other scheduling schemes.


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    Title :

    On scheduling vehicle-roadside data access


    Contributors:
    Zhang, Yang (author) / Zhao, Jing (author) / Cao, Guohong (author)


    Publication date :

    2007


    Size :

    10 Seiten, 10 Bilder, 1 Tabelle, 20 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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