:::
Transportation Dissertation
| Title | A Study on Evaluation of Wireless Communication Network Alternatives for Urban |
|---|---|
| Year | 2006 |
| Summary | Graduate Institute of Transportation Science, Tamkang University
A new concept “Paradigm Shift” was presented in Thomas S. Kuhn’s ”The Structure of Scientific Revolutions” in 1967. ”Paradigm Shift” means the process of the science is the revolution, not the evolution. The evolution of transportation technology fits this concept likewise. Many developed countries have deployed wireless communication technologies to overcome drawbacks of high costs of wired line construction and transmission for traffic information services. It is anticipated that several wireless communication technologies with high mobility and data rate (WiMAX, WiBro) will be soon available for urban traffic control and management. The main purpose of this study aims at proposing an evaluation process to identify feasible wireless communication network alternatives for urban traffic field devices. First, case studies of wireless communication technologies applying to urban traffic management are reviewed worldwide. Secondly, the criteria of the wireless communication network alternatives are set up with the help of group decision making and gray statistical methods. Thirdly, the weight of compromise is calculated to obtain the weight of evaluation for each alternative. Then, 5 multi-attribute evaluation models (FAHP, FTOPSIS, FSD, MEQQD and FGRAY) are chosen to compare standard conditions with qualitative and quantitative data. Finally, combinations of six types of wireless communication technologies (GPRS, 3G, WiBro, WLAN, WiMAX, Wireless Mesh Network) are made to identify the most appropriate alternative and the most feasible evaluation model of wireless communication networks for urban traffic management field devices. Taipei is chosen as the empirical case study by using a hierarchy framework including four objectives (function, quality, cost and system) and 16 criteria. It is found that weight of cost is highest and weight of system is lowest for each alternative. The 8th alternative (2.5G/3G+WLAN/WiMAX) is found to be a comprehensive wireless communication network for the long-term choice. Considering standard conditions with quality and quantity criteria the most appropriate evaluation method is MEQQD. An evaluation mechanism similar to BCG model is also provided to depict the roadmap of deploying wireless communication networks for urban traffic management devices. |
Count Views:478