Advanced travel information system in heterogeneous networks

Hsu Yung Cheng, Victor Gau, Chih Wei Huang, Jenq Neng Hwang, Chih Chang Yu

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


In order to achieve better road utilization and traffic efficiency, there is an urgent need for a travel information delivery mechanism to assist the drivers in making better decisions in the emerging intelligent transportation system applications. In this paper, we propose a relayed multicast scheme under heterogeneous networks for this purpose. In the proposed system, travel information consisting of summarized traffic conditions, important events, real-time traffic videos, and local information service contents is formed into layers and multicasted through an integration of WiMAX infrastructure and Vehicular Ad hoc Networks (VANET). By the support of adaptive modulation and coding in WiMAX, the radio resources can be optimally allocated when performing multicast so as to dynamically adjust the number of data layers received by the users. In addition to multicast supported by WiMAX, a knowledge propagation and information relay scheme by VANET is designed. The experimental results validate the feasibility and effectiveness of the proposed scheme.

Original languageEnglish
Pages (from-to)203-207
Number of pages5
JournalWorld Academy of Science, Engineering and Technology
StatePublished - Sep 2009


  • Intelligent transportation systems
  • Relayed multicast
  • Vehicular Ad hoc Networks (VANET)
  • WiMAX


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