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研究生: 高傳凱
Kao, Chuan-Kai
論文名稱: 行動式隨意網路上之附帶消息的燙手山芋路由協定
Gossip Hot-potato routing protocol in Mobile Ad hoc Network
指導教授: 李忠憲
Li, Jung-Shian
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 電腦與通信工程研究所
Institute of Computer & Communication Engineering
論文出版年: 2005
畢業學年度: 93
語文別: 英文
論文頁數: 56
中文關鍵詞: 行動式隨意網路附帶消息之燙手山芋
外文關鍵詞: mobile ad hoc network, gossip hot-potato
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  •   “速度”已經身受現代人所重視,無論是電腦的執行速度,亦或是網路的傳輸速度,甚至是交通工具的速度,比之過去都大大的提昇了不少。像是某些國家火車的速度竟然都高達200 km/h以上,磁浮列車更是高達300 km/h以上,無線網路上裝置的速度也越來越快。在行動式隨意網路(Mobile Ad hoc Network)日漸成熟的今天,已有為數不少的路由演算法是眾所皆知的,例如:隨意式距離向量路由(Ad hoc On-demand Distance Vector Routing)、動態來源路由(Dynamic Source Routing)、目的節點序列距離向量路由(Destination-Sequenced Distance-Vector)、臨時排序路由(Temporally-Ordered routing algorithm)等。緃觀這些路由協定,我們可以發現它們同時具備了一項特性,就是當這些路由應用在高速無線網路上時,效能會大大的減低,我們如今面對的是越來越快速的環境,如果我們能有一個路由,在行動式隨意網路中能不受速度影響並且保持正常的傳輸效能,這樣的路由才能在高速網路中生存,而此正是我們所提出的附帶消息之燙手山芋路由協定的特性。

     “Speed” is focused by people in the recent year. The speed of now is higher than past no matter what the processor speed of computer is, the transmit rate of network is, or transportation speed is. For example, the top speed of trains which some of countries can reach 200 kilometers per hour. Furthermore the Maglev trains that reach speeds exceeding 300 kilometers per hour. The moving speed of device in the wireless network is more and more quick, too. Lots of routing protocols have been proposed for mobile ad hoc networks, for example, AODV (Ad hoc On-demand Distance Vector Routing)、DSR (Dynamic Source Routing)、DSDV (Destination-Sequenced Distance-Vector)、TORA (Temporally-Ordered routing algorithm). For most of the proposed ad hoc routing protocols, the performance becomes worse when the speed of hosts is very fast. The performance is low when the network speed is more and more high. For fast-moving hosts in mobile ad hoc network, we propose a novel routing protocol. The performance of the proposed routing is proven to be better through detailed simulations.

    1. Introduction………………………………………………………………………… 1 1.1 An overview of mobile ad hoc network..……………………………… 1 1.2 Motivation for the Thesis…………………………………………………… 3 1.3 Organization………………………………………………………………………… 4 2. Related Work………………………………………………………………………… 5 2.1 The link break boundary.…………………………………………………… 5 2.1.1 Generate connectivity matrix……………………………………………… 5 2.1.2 The needed longest time to forward the routing message…… 8 2.1.3 Average distance between two neighbor nodes……………………… 8 2.1.4 Each node move distance…………………………………………………… 11 2.1.5 Random variable of velocity of mobile stations………………… 12 2.2 Gossip Flooding…………………………………………………………………… 14 2.3 Hot-potato routing……………………………………………………………… 16 2.4 The mobility models…………………………………………………………… 17 2.4.1 Free Space mobility model………………………………………………… 17 2.4.2 Freeway mobility model……………………………………………………… 18 2.4.3 Manhattan mobility model…………………………………………………… 19 3. Gossip hot-potato routing protocol………………………………………… 21 3.1 Directive cache…………………………………………………………………… 21 3.2 Gossip hot-potato………………………………………………………………… 22 4. Enhance Gossip hot-potato routing protocol…………………………… 27 4.1 Slowly Moving routing table………………………………………………… 27 4.2 Enhance Gossip hot-potato…………………………………………………… 30 5. Simulation Result………………………………………………………………… 35 5.1 Simulation Setups………………………………………………………………… 35 5.2 Gossip hot-potato………………………………………………………………… 36 5.2.1 Scenario…………………………………………………………………………… 36 5.2.2 Gossip hot-potato routing in Free Space mobility model…… 37 5.2.3 Gossip hot-potato routing in Freeway mobility model………… 40 5.2.4 Gossip hot-potato routing in Manhattan mobility model……… 43 5.3 Enhance Gossip hot-potato…………………………………………………… 46 5.3.1 Scenario………………………………………………………………………… 46 5.3.2 Enhance Gossip hot-potato in Free Space mobility model…… 47 5.3.3 Enhance Gossip hot-potato in Freeway mobility model………… 48 5.3.4 Enhance Gossip hot-potato in Manhattan mobility model……… 50 5.3.5 The distribution density of slow node……………………………… 51 7. Conclusion and Future Work…………………………………………………… 53 8. References…………………………………………………………………………… 55

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