行動計算之移動式TCP/IP網際網路協定

Abstract

近年來,結合網際網路的技術在行動計算環境 (Mobile computing environment)下發展 應用系統是一個蓬勃發展的趨勢。在這篇論文內,我 們將建立一個與TCP/IP網際網路協定相容並適合行動計算環境的協定群。 在此我們稱之為行動計算之移動式TCP/IP網際網路 協定。在這篇論文中, 這一套移動式TCP/IP網際網路協定(mobile TCP/IP protocol)不 僅提供 了行動主機(MH)可在區域網路內移動,更可方便的在廣域網路內移動。同 時還提出了一個兩階層的閘路架構。在此架構中有兩個主要的網路元件: 移動支援閘路(mobility gateway)及區域性移動支援閘路(region moility gateway)。這些閘路被設計成擁有移 動式繞路協定(mobile IP routing),可支援行動主機 (Mobile host, MH)之資料傳輸與 通訊。此 外,又擁有移動式傳輸控制協定(mobile TCP), 可減少因移動或干擾造成 的資 料遺失或資料錯誤。行動支援閘路(mobility gateway)又具有行動 主機(MH)之資料傳輸 代理人的功能,可使行動主機(MH)在進行資料通訊 時, 提供通訊的透明性。最後在論文 中,亦簡單作了一些效能分析證明 了所提出的這一套移動式TCP/IP網際網路協定(mobile TCP/IP protocol) 是非常有效的協定。 There is a growing trend in developing the Internet (TCP/IP) application systems for it mobile computing environment. This paper describes the design of a mobile TCP/IP scheme that is compatible with the TCP/IP protocol suite and suitable for the mobile computing environment. The mobile TCP/IP scheme in this paper provides host mobility over local and wide area of the Internet network, and also proposes a two hierarchical infrastructure. In the two hierarchical infrastructure, there are two important components:region mobility gateway and mobility gateway. They can support more efficient routing scheme in mobile IP layer. and support packet error and lost recovery in mobile TCP layer. In addition, the mobility gateways are used as proxies for mobile hosts to provide transparent communication among mobile hosts. The performance analysis shows that the proposed mobile TCP/IP scheme is very effective.