以網路位址轉換機制為基礎的移動式計算網路架構

Abstract

Mobile IP可以在現有使用TCP/IP訊協定為主的網際網路的架構下，解決相關移動式問題，但是因為可使用的合法的IP 位址在今日已面臨不足的問題，所以使用保留式IP 位址並且利用NAT(Network Address Translation)技術來達到上網已非常的普遍，但Mobile IP無法讓使用NAT上網的主機漫遊，所以本論文提出三種通訊協定，MNATP(Mobile Network Address Translation Protocol)、NATIEP(Network Address Translation Information Exchange Protocol)和MHLIEP(Mobile Host Location Information Exchange Protocol)，利用此三種通訊協定配合其它相關的協定，可以建立一個無線漫遊的虛擬網路環境，我們稱這樣的一個環境為NATMCN(NAT Mobile Computing Network)。NATMCN藉由提供網路層之協定來達到漫遊之目的，移動式主機不需依賴特殊作業系統也不需修正其上的軟體。任何移動式主機都可以在NATMCN中做漫遊。隨時隨地和其他NATMCN中的移動式主機或網際網路上的主機連線。

Mobile hosts in a TCP/IP network can roam anywhere and anytime using Mobile IP. Network Address Translation(NAT) is a network technology widely deployed because it solves the problem of IP shortage. However, mobile hosts in a private IP network cannot roam to another private IP network through using Mobile IP. Therefore, we propose three protocols which are MNATP(Mobile Network Address Translation Protocol),NATIEP(Network Address Translation Information Exchange Protocol) and MHLIEP(Mobile Host Location Information Exchange Protocol) to support mobility in a private IP network. We call such a private IP based mobile network a NATMCN(Network Address Translation Mobile Computing Network). Registration of a mobile host in a NATMCN is done by an agent(called a NAT Router) and traffic delivery is done by address/port translation rather than by tunneling. Thus,a mobile host requires neither operating system support nor NATMCN-specific modification.