非同步傳輸模式網路上隨選音樂服務之設計

Abstract

隨著電腦網路與科技的快速發展, 多媒體通訊服務的需求越來越多. 由 於多媒體通訊服務需要使用大量的頻寬, 所以必需要有比較好的網路架 構來處理大量的多媒體訊務. 非同步傳輸模式 (ATM) 網路與其它的網路 相關技術比較, 具有比較強的能力來處理這類多媒體訊務, 因此在本篇 論文中, 我們採用它作為整個網路傳輸模組的技術. 由於傳統電腦網路 在設計時並沒有考慮到音效或影像等連續性多媒體訊務的特性, 因此當 我們要在傳統的電腦網路上傳輸連續性多媒體訊務時, 就沒有辦法有效地 控制它的播放品質.有鑑於此, 在此篇論文中, 我們提出以非同步傳輸模 式網路為主幹的網路架構, 並建立適合傳輸連續性多媒體訊務的傳輸層通 訊協定, 以期在非同步傳輸模式網路上提供隨選音樂的服務. 而在實作 中, 我們探討了隨選音樂伺服器與播放用戶端的設計考量, 並提出適當的 解決方法. 根據隨選音樂服務的實際展示結果, 我們發現使用這種新提 出的網路架構及通訊協定, 可以有效的控制音樂的播放品質. With the rapid growth of computer network and the improvement oftechnology in high speed network, the need of networked multimediaservice will increase. Because the high bandwidth requirement ofnetworked multimedia service, we need a better network architecture tohandle this heavy multimedia traffic. Asynchronous Transfer Mode (ATM)is superior, concerning about other networking techniques, to deal withthis kind of multimedia traffic. In this thesis, we use ATM in ournetwork transmission module.Conventional share media LAN did not consider the characteristic ofcontinuous multimedia traffic such as audio or video in their designttime. When we want to transmit the continuous multimedia traffic inconventional computer network, it is not easy to control the quality ofplayout. In this thesis, we use the ATM network as the backbone anddevelop a transport layer protocol suitable for transmitting continuousmultimedia traffic, so we can offer the music-on-demand service on ATMnetwork. In practice design, we discuss the design critical ofmusic-on-demand server and client playback and we proposed the suitablecontrol methods to solve them. According to the demo of music-on-demandservice, we have the better quality of playout by using the new networkarchitecture and protocol.