An optimized TCP for internet access of vehicular ad hoc networks

  • Authors:

  • Marc Bechler;Sven Jaap;Lars Wolf

  • Affiliations:

  • Institute of Operating Systems and Computer Networks, Technical University of Braunschweig;Institute of Operating Systems and Computer Networks, Technical University of Braunschweig;Institute of Operating Systems and Computer Networks, Technical University of Braunschweig

  • Venue:
  • NETWORKING'05 Proceedings of the 4th IFIP-TC6 international conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication Systems
  • Year:
  • 2005

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Abstract

Communication efficiency at the transport layer is of specific importance for ad hoc networks. Especially in vehicular ad hoc networks, vehicles will have a temporary and rather short-lived connectivity to the Internet, which has to be utilized efficiently. In this paper, we propose a TCP-based transport protocol called MCTP that is optimized for the Internet access in vehicular environments. Therefore, MCTP is combined with split performance enhancing proxy architectures, where a proxy separates the end-to-end TCP connection. This enables the deployment of optimized transport protocols while maintaining interoperability with TCP used in the Internet. For the evaluation, we emulated the communication characteristics of a “typical” vehicular scenario. This clearly shows the advantages of MCTP over traditional approaches; the overall data throughput is significantly higher when MCTP is used for communication between vehicle and proxy. The evaluation also emphasizes the usefulness of performance enhancing proxies in vehicular environments.