臺灣博碩士論文加值系統

在車載隨意網路中,移動的車輛被視為節點. 車輛可以藉由基地台連接到網際網路,由於車輛的移動速度非常快,車輛能跟基地台連結的時間是非常短的. 車子跟基地台連結的大部分時間是花在車子經由DHCP向基地台拿到IP位址. 由於車載隨意網路中結點的移動性較高,導致拓樸快速改變和網路連結中斷. 為了解決這些問題,我們提出一個新的機制來降低從DHCP獲得IP位址的負載.
我們的協定也考慮了網路破碎的問題. 我們也提供模擬結果來檢視我們機制的效率.

In Vehicular Ad-Hoc Networks (VANETs), moving vehicles are considered as nodes in the network. Vehicles can connect to the Internet by accessing Basic Station (BS), because of their fast mobility, vehicles can only connect to a BS for a very limited amount of time.
The time for a vehicle to obtain an IP address via Dynamic Host Configuration Protocol (DHCP) from BS is a main part of the connection time. On the other hand, the VANETs are high mobility patterns that cause frequently and fast topology changes and also frequently disconnection. To solve these problems, we propose a novel scheme to reduce overheads of acquiring an IP address via DHCP.
The protocol also considers the network fragmentation problem that cause by the variation of traffic. We also provide simulation results that demonstrate the efficiency of our scheme.

Abstract i
Acknowledgments ii
Table of Contents iii
List of Figures iv
List of Tables v
Chapter 1 Introduction 1
1.1. Research Background 1
1.2. Thesis Objectives 4
1.3. Thesis Organization 5
Chapter 2 Related Work 6
Chapter 3 Network Model 11
Chapter 4 IP Address Buffering Scheme 15
4.1 Thrhold_IP_Buffering 17
4.2 Frag_IP_Buffering 23
Chapter 5 Performance Evaluations 34
5.1. Scenario Characteristics 34
5.2. Evaluation Metrics and Simulation Parameters 36
Chapter 6 Conclusions and Future Work 43
References 44

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