Contact-Aware Optimal Resource Allocation for Mobile Data Offloading in Opportunistic Vehicular Networks

To cope with increasing vehicular traffic and extensive application demands on vehicular cellular networks, opportunistic vehicular networks are used to disseminate mobile data by high-capacity device-to-device communication contacts when vehicles come into the communication range of each other, which offloads significant traffic from the cellular network. The current opportunistic vehicular data transmission models often do not take into account the fact that the contact duration is usually very short, due to the high mobility of vehicles, which will limit the amount of data that can be transmitted during one opportunistic contact. In this paper, the authors consider a mobile data offloading system that integrates cellular network and vehicular opportunistic communications. Based on this proposed system, the authors establish a mathematical framework to study the problem of contact-aware optimal resource allocation for mobile data offloading by the explicit consideration of the contact duration. Based on theoretical analysis of this problem, the authors derive an optimal scheme for mobile data offloading to optimally allocate the network resources in terms of opportunistic contacts and offloading helpers’ storage. By carrying out extensive simulation using two realistic urban vehicular traces, the authors demonstrate the effectiveness of the authors' contact duration aware optimal offloading scheme, in comparison with a wide range of existing schemes.

Language

  • English

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  • Accession Number: 01648843
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 23 2017 1:38PM