在行動式網際網路下的群播系統

Abstract

隨著視訊會議的盛行,使得群播需求不斷的增加,但是目前的網路環境中並 不支援真正的群播功能,現有的群播網路(MBone)是架構在網際網路上的虛 擬群播網路。另一方面,由於交通的便利,使得人們的活動範圍不再挶限於 固定的地點,為了滿足人類移動上的方便,行動式網際網路的環境也開始受 到極大的重視。要如何結合這兩項重要的潮流,已經成為今日重要的研究 方向之一。這篇論文提出了一個方法,使得行動式網際網路協定的環境中 也能享受到群播的服務,同時達到較有效率的傳輸要求。 Due to the popular of video conference, multicasting has become a very important function. However, the computing network does not support realmulticasting mechanism today. So the Multicast backBone (MBone) has become a virtual multicasting network that layers on top of portions of the physical Internet to support routing of IP multicast datagrams. On the other hand, people has not been constrained in a fixed place anymore for the convenience of traffic. To satisfy the mobility property, mobile environment is also urgent today. It is important to combine the multicasting with Mobile-IP environment. This thesis proposes a new method to support multicasting within Mobile-IP environment. Besides, this method also provides a better performance for such an environment.