隨著網際網路的高度發展及資訊設備如行動電話、PDA及筆記型電腦的普及化，無線通訊的使用已相當普遍。同時為應付大量使用者在同一時間上線，而造成網路頻寬不足的問題及伺服器端無法負荷之瓶頸，無線廣播成為目前行動通訊解決頻寬的重要技術，多通道資料廣播技術的興起，可以減少廣播循環頻道之長度，藉此可讓使用者減少資料存取時間。在本論文中我們使用模擬退火演算法，來解決多通道行動環境中之資料廣播問題，此方法可以找尋一組較佳廣播資料物件的排程，並經實驗證明確實可以有效降低行動用戶端的平均存取時間。 Wireless communication is now an important part of our modern lives. This is mainly due to the rapid advancement in internet technology and the popularity of telecommunication equipments such as mobile phones, PDA and notebook. At the same time, to accommodate large number of user to be on the internet simultaneously, there are bottleneck problems of exceeding the capacity of ADSL and overloading the internet server. Broadcasting is an important issue for bandwidth in wireless environments. Multi-channels broadcast technology can reduce broadcasting cycle, and it can reduce users’ data access time. In this thesis, we use simulated annealing algorithm to solve the data broadcasting problem of multi-channels mobile environment .This method can find a better broadcast ordering. Experimental results show that our simulated annealing approach does efficiently reduce the access times of client users.
