| Summary: | 碩士 === 東海大學 === 資訊工程學系 === 103 === In a healthcare system, transporting patients to hospital is an important task for saving their lives since research indicates that there is a close relationship between ambulance response time and patient mortality. The longer the response time is, the higher the mortality will be. In many country, implemented standard of the emergency medical service shows that in urban areas, 90% of requests must be satisfied within 7~10 minutes. But some unexpected traffic situations may delay the rescue task, therefore, in this paper, we propose a novel traffic control scheme, called the Efficient and Secure Traffic Control System (ESTCS for short), aiming to guide an ambulance (AMU) to safely navigate so as to shorten its attendant time, and fast deliver patients to hospitals. The ESTCS also employs an exception handling mechanism, with which when an AMU encounters unforeseen situations, it can accordingly resolve them quickly and safely. In addition, a dynamic timing encryption key and a two-dimensional stream encryption function are employed by the ESTCS to provide AMUs with a more secure working environment and improve better performance.
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