| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 101 === In recent years, the service of multimedia transmission becomes universal due to the rapid development of wireless networks. Smart phone and tablet PC become more and more popularization, bring more convenience to people. However, bandwidth detection mechanism is very important in the transmission of video streaming. Using the information of bandwidth detection will make the clients to be high-quality services. A good bandwidth detection mechanism should include the two following characters, accurate and fast, which mean to provide available bandwidth accurately and fast detection. The proposed bandwidth detection mechanism, which use the protocol of IEEE802.11 Wi-Fi and the probability of the available channel time. The proposed method can accurately and quickly calculate the available bandwidth. When the client is moving, there will be a lot of packet loss. Because of the consideration of packet loss in network, the methods used in estimating the bandwidth and parameter choice, significantly improve the accuracy of the bandwidth detection. For the easily packet loss of wireless network environment, the methods we adopted, avoid the large amount of error from bandwidth detection due to packet loss, can improve the accuracy. Our methods are proved to be superior to other bandwidth detection tools in measured results.
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