以移動性為基礎 改善階層化移動式IPv6換手機制

Improving HMIPv6 Handoff Protocol Based on Mobility

葉冠廷(KUAN-TING YEH)

指導教授 ： 涂世雄

中原大學/工學院/電機工程研究所/碩士(2008年)

https://doi.org/10.6840/cycu200900579

摘要

在階層化移動式IPv6網路中，如何選擇一個移動錨點以及關心他的負載狀況是與它的系統穩定度息息相關的。所以提出了一個新的理論去改善這兩個問題。一個抽象移動錨點選擇機制去擴展服務範圍，並且用一個新的換手機制去改善換手延遲問題。
在提出的第一個理論中，我們提出一個移動錨點選擇機制，這機制利用停留在一個區域的停留時間作為準則，並且利用抽象移動錨點的機制去擴展服務範圍，這樣可以有效減少在對應節點與本地代理人之間頻繁的封包交換。
在第二個理論中，我們有效利用DAD確認時間的空檔，去同時對本地代理人與對應節點先作確認位址動作，以有效的改善換手延遲問題。
這篇論文所作的貢獻有二：
（1）
我們不僅考慮到負載平衡問題，也同時減少了封包遺失。
（2）
有效改善換手延遲問題。

關鍵字

階層化移動式 ； IPv6

並列摘要

In Hierarchical Mobile IPv6 (HMIPv6) networks, the system performance is critically affected by the selection of Mobile Anchor Points(MAPs) and its load status. So we propose a novel scheme to improve these two problems. An abstract Mobile Anchor Point selection mechanism is proposed to broaden the service range of MAP. In the meantime a seamless handoff method, SHMIP(Stealth-timeHMIP) is given to reduce the handoff latency.
In the first scheme, we propose a MAP selection mechanism that takes the mobile node’s particular characteristics including the mobility velocity of communication services into consideration. This method applies Abstract MAP to the original MAP domain, that also can reduce the packets exchange between Correspondent Node (CN) and Home Agent(HA) due to macro movement.
In the second scheme, we consider handover operations. We analyze the handoff delay and find that the DAD (Duplicated Address Detection) time represents a large portion of handoff delay. By this way, we propose a method which can utilize the DAD checking time on the handoff delay and, thus, reduce the handoff time significantly.
The contributions in this thesis are as follows:
(1)
We consider not only loading balance but also reduce packets loss.
(2)
Improvement of the handoff performance, since local handovers are realized in a local manner.

並列關鍵字

IPv6 ； Mobility

參考文獻

based on users mobility profiles for IPv6,＂ELSEVIER May 2006.

Mobile History for Hierarchical Mobile IPv6 Networks,Volume3, 29 IEEE Nov.-3 Dec. 2004 Page(s):1585 - 1589 Vol.3.

[4]Zheng Wan, Xuezeng Pan, Xiaofeng Chen, Fanjun Su,“A Novel

Load Control and Mobility Management Scheme for Hierarchical Mobile IPv6 Networks,＂15-17 IEEE Nov. 2005 Page(s):5 pp.

[6]K. Kim et al, ”Fast Handover Method for mSCTP Using FMIPv6”,