近幾年來，IEEE 802.11無線網路及其周邊產業的蓬勃發展個人手持式裝置如PDA、筆記型電腦的盛行，再加上政府e化與m化建設的推波助瀾，已日漸改變了多數人對資訊產品的使用習慣。但在大眾享受無線網路帶來的方便同時，卻也不自覺的被基礎建設模式(Infrastructure Mode)無線網路限制。因為802.11無線網路先天性的短距離以及缺乏換手(Hand off)機制造成使用者必須在Access Point附近定點使用。而在無線隨意式網路(Wireless Ad-hoc Network)中，每個行動節點都扮演著路由器的角色，藉由位於起始節點與目的節點中間的移動節點傳遞訊息，可以將訊息傳遞的距離延伸到數倍之遙，恰可解決802.11無線網路基礎建設模式傳輸距離不夠的問題。除此之外，這種不需要基礎建設的網路也很適合用在瞬息萬變的戰場以及急難災害救助單位使用。
   因此本論文欲將無線隨意網路路由協定AODV與Mobile IP在SIP環境下之整合，由AODV負責在子網路內的移動，MOBILE IP則是在跨越子網路時負擔換手的工作。上述的架構將以軟體模擬的方式呈現其移動性及換手機制，並以此分析探討其他可行之應用。

In recent years, the strong development on IEEE802.11 wireless network and the peripheral industry, the prevailing use of personal handset devices such as PDA and notebook computers and the strong impetus of government strategies towards electronization and mobilization have gradually changed most people's using habits on information products.
But when people enjoy the convenience wireless networks bring, they don't know that they are limited by the infrastructure Mode of wireless network because the nature of short distance and the lacking of hand off mechanism in IEEE802.11 wireless network make the users have to access it near the fixed points. However, in Wireless Ad-hoc Network, all the mobile nodes play the role of routers.  Information can be transmitted through the mobile nodes  between the origin node and the destination node.  In this way, information can even be sent to multiple distances.  Thus the Wireless Ad-hoc Network can solve the problem of insufficient distance encountered in IEEE802.11 wireless network.  In addition, the Wireless Ad-hoc Network is also excellent to be used in battlefield and for emergency department.
This paper will discuss the integration of AODV routing protocol and mobile IP under SIP environment. AODV will be responsible in moving in the sub-network and Mobile IP will be in charge of hand-off mechanism while crossing sub-networks.  The mobility and the hand-off mechanism of the above structure will be presented in the way of software simulation and other possible applications will also be further analyzed.

致謝	I
淡江大學論文提要	II
英文提要	III
目錄	IV
圖目錄	VI
表目錄	VIII
第一章 緒論	2
1.1.	前言	2
1.2.	研究動機	3
第二章 理論分析	4
2.1.	IEEE 802.11無線區域網路概述	4
2.1.1.	IEEE 802.11主要硬體元件	4
2.1.2.	IEEE 802.11軟體架構	6
2.2.	MANET 行動式隨意行動網路相關研究	7
2.3.	AODV(RFC 3561)路由協定概述	10
2.3.1.	AODV通訊協定的運作	10
2.4.	Mobile IP (RFC 2002)協定概述	12
2.4.1.	Mobile IP網路系統架構	13
2.5.	網路電話(VOIP)簡介	16
2.6.	會談起始協定(SIP, RFC 3561)概述	18
2.6.1.	SIP主要元件與基礎架構	18
2.6.2.	SIP通訊協定格式	20
2.6.3.	SDP會談描述協議	22
2.6.4.	SIP服務與運作方式	23
第三章MOBILE IP/AODV/SIP整合網路設計	27
3.1.	網路架構	27
3.1.1.	網路協定架構	28
3.1.2.	無線網路硬體架構	30
3.2.	訊息傳遞的流程	31
3.2.1.	行動節點在本地網路上的註冊	31
3.2.2.	行動節點在外地網路上的註冊	32
3.2.3.	行動節點在網路上擔任發話方	34
3.2.4.	行動節點在網路上擔任受話方(Direct Call)	34
3.2.5.	行動節點在網路上擔任受話方(Proxy Call)	35
第四章 效能評估與模擬結果	39
4.1.	模擬工具說明	39
4.2.	網路模型架構	39
4.3.	環境設定及模擬參數	41
4.3.1.	環境設定:	41
4.3.2.	參數設定:	42
4.4.	模擬結果	44
4.5.	模擬結果總結	55
第五章 結論與未來工作	57
參考文獻	58

圖目錄


圖2.1 RREQ避免重送廣播封包示意圖.................................................11
圖2.2 Mobile IP元件示意圖...................................................................14
圖2.3 SIP Direct Call建立程序………………………………………..23
圖2.4 SIP Proxy Call建立程序………………………………………..25
圖2.5 SIP Redirect Call建立程序……………………………………..26
圖3.1行動節點在無線隨意網路與無線隨意網路之間的換手………28
圖3.2行動節點在行動隨意網路之中的換手………………………….29
圖3.3網路協定堆疊…………………………………………………….29
圖3.4實體網路架構示意圖………………………………………….…31
圖3.5行動節點在本地網路上的註冊流程圖……………………….…32
圖3.6行動節點在外地網路上的註冊流程圖……………….…………33
圖3.7行動節點在網路上擔任發話方的流程圖…………………….…34
圖3.8行動節點在網路上擔任直接呼叫受話方的流程圖………….…35
圖3.9行動節點在網路上擔任代理呼叫受話方的流程圖……….……36
圖3.10行動節點在網路上進行換手的流程圖………………….……..38
圖4.1構成行動節點的功能區塊…………………………………….…40
圖4.2構成無線網路閘道器的功能區塊…………………………….…41
圖4.3無線隨意網路元件的分布圖………………………………….…42
圖4.4 無線網路的負載-不使用Mobile IP………………………….…45
圖4.5 無線網路的負載-使用Mobile IP…………………………….…45
圖4.6 無線網路的延遲-不使用Mobile IP………………………….…46
圖4.7 無線網路的延遲-使用Mobile IP…………………………….…47
圖4.8 從行動節點送往Internet上的語音封包流量………………….48
圖4.9 Internet端點接收到的語音封包流量-不使用Mobile IP………49
圖4.10 Internet端點接收到的語音封包流量-使用Mobile IP………..50
圖4.11 從Internet端點上送往行動節點的語音封包流量…………...51
圖4.12行動節點接收到的語音封包流量-不使用Mobile IP………….52
圖4.13行動節點接收到的語音封包流量-使用Mobile IP ……………53
圖4.14行動節點接收到的語音封包延遲-不使用Mobile IP………… 54
圖4.15行動節點接收到的語音封包延遲-使用Mobile IP…………… 55




表目錄



表2.1 Table Driven 與 Source-Initiated 協定的比較………………...9
表2.2 SIP Request常用指令表…………………………………………20
表2.3 SIP Response常用指令表……………………………………….21
表4.1模擬預設的參數值……………………………………………….43

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