S-PMIPv6:  在 LMA 內部的移動模型

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Title:	S-PMIPv6: 在 LMA 內部的移動模型
Other Titles:	S-PMIPv6: an Intra-LMA model for IPv6 Mobility
Authors:	劉晉宇 LIU, CHIN-YU
Contributors:	呂芳懌 LEU, FANG-YIE 資訊工程學系
Keywords:	路由優化;O-PMIPv6;F-PMIPv6;PMIPv6;SCTP;換手路由優化;O-PMIPv6;F-PMIPv6;PMIPv6;SCTP;換手
Date:	2015
Issue Date:	2015-12-22T06:00:58Z (UTC)
Abstract:	IPv6 是在 90 年代中期定義的 RFC 2460，IPv6 是 IP 第 4 版本（IPv4）的改進和簡化的繼任版本。它的目的是保存 IPv4 的優點同時提供更好的網絡互聯能力。移動 IP 使移動節點可以經由一個網絡移動到其它網路還可以識別的 IP 地址，儘管在不同網絡間，連接到不同的位置都無需用戶的參與。代理移動 IPv6（PMIPv6的簡稱），作為基於網絡的移動性管理協議，由 IETF 於 2008 年發布支持 IP 移動的 RFC5213。但是 MN 的換手期間，也不能完全避免網絡鏈路的斷線。後來 IETF在 2010 年發布 RFC5949 的快速代理移動 IPv6（F-PMIPv6 的簡稱）協議，該協議被設計為主要提高其換手的可靠性，特別是用於降低其切換延遲和封包遺失率，以及降低網絡鏈路斷線的機率。另一方面，無論多麼快的切換，它的延遲難免存在，且會提高封包遺失率。因此，在此研究中，我們提出了一種新的 PMIPv6 協議，稱為以 SCTP 作為代理移動 IPv6 的基礎（S- PMIPv6 的簡稱），其中集成 F-PMIPv6、流控制傳輸保護（SCTP 的簡稱）和路由優化，以提高其 IP 移動的可靠性，實現無縫切換。我們的模擬表明，S- PMIPv6 實際上可以先“連線”之後在“斷線”，有效地縮短了終端到終端的延遲封包傳輸和較低的封包遺失率。 IPv6 defined in RFC 2460 in the mid-1990s is an improved and streamlined successor version of IP version 4 (IPv4). It is designed to coexist with IPv4, while providing better internetworking capabilities than this successor version. Mobile IP enables a mobile node to be recognized via a single IP address even though the node is traveling from one network to another. Despite reposition among different networks, connectivity at different positions is attained continuously with no user intervention. Proxy Mobile IPv6 (PMIPv6), as a network-based mobility management protocol, was released in 2008 by the IETF in RFC 5213 to support IP mobility. But during MN’s handover, disconnection of a network link cannot absolutely be avoided. The IETF later in 2010 in RFC 5949 proposed Fast Proxy Mobile IPv6 (F-PMIPv6 for short) protocol, which was designed to mainly improve the reliability of its switching process, particularly for reducing its handover latency and packet loss rate, as well as lowering the probability of network-link disconnection. On the other hand, no matter how fast a handover is, its delay does unavoidably exist. It in turn rises the packet loss rate. Therefore, in this study, we propose a novel MIPv6 family protocol, called SCTP-based Proxy Mobile IPv6 (S-PMIPv6 for short), which integrates F-PMIPv6 with Stream Control Transmission Protocol (SCTP for short) and route optimization to enhance its IP mobility reliability and achieve the stage of seamless handover. Our simulation demonstrates that S-PMIPv6 can actually “make” before “break”, effectively shorten end-to-end delay of packet delivery and lower packet loss rate.
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