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相關文獻
- AODV協定跨層機制發展與模擬
- 在隨意式網路下以動態形成叢集為基礎的路徑繞送技術
- On Concerning Destination Movement in Path Maintenance for Ad Hoc On-Demand Routing
- 隨意式無線網路效能之探討
- Fault-Tolerant Embedded Stable Routing Algorithm to Improve the Quality of Path (QoP) in Ad Hoc Wireless
- Enhance the Performance of Hierarchical Cellular-Based Management by Using Mobile Agents
- A New Scheduling MAC Mechanism for AODV Protocol
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題名 | AODV協定跨層機制發展與模擬=AODV Protocol Cross-Layer Mechanism Development and Simulation |
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作者 | 周碩聰; 蕭振木; 李仁鐘; | 書刊名 | 康寧學報 |
卷期 | 13 2011.06[民100.06] |
頁次 | 頁1-19 |
分類號 | 448.6 |
關鍵詞 | 隨意式無線網路; 跨層演算法; 主動式路由; 競爭視窗; Ad hoc wireless network; Cross layer algorithm; Reactive routing; Contention window; |
語文 | 中文(Chinese) |
中文摘要 | 隨著行動運算技術的廣受重視,高性能無線隨意式 (Ad Hoc)網路路由協定需求持續增加。文獻顯示,許多學者紛紛投入AdHoc 無線路由協定機制的改善與運作模式的研究,利用電腦模擬Ad Hoc 無線網路中各種不同環境或負載條件,以提升網路的傳輸效能。然而,大部分的研究僅侷限於單一網路層參數調整或路徑搜尋方式改善,鮮少論及不同層級通訊協定間效能相互之影響。本論文以網路層AODV 協定及資料鏈結層IEEE 802.11 協定作為研究標的,根據Ad Hoc 無線網路的主動式路由及多點跳躍特性,提出一種跨越網路層及媒體層(MAC)的新演算法-順序優先排程之 AODV 協定;將上層AODV 路由協定之資料傳輸路徑總長及距離目的地節點剩餘跳躍數當作耦合參數,傳遞給下層EEE 802.11 協定,做為後續各節點競爭視窗大小的計算依據。此一架構打破傳統協定上、下層間各自獨立的運作模式,彼此互相分享網路狀態資訊,可以使下層IEEE 802.11 協定減少傳送過程中引發的封包碰撞及資料遺失,間接地改善上層AODV 協定的網路傳輸效能。最後,我們將經由電腦模擬來驗證本論文所提策略之正確性與優越性。 |
英文摘要 | As mobile computing technology gains great attention and popularity in recent year, the need for ad hoc routing protocols continues to grow. There have been many researches proposing many different models of routing protocols and numerous simulations to compare their performance under varying conditions and constraints. However most of them only studied based on IP layer without considering the influence of MAC layer. There raises a question that whether the choice or change of MAC mechanisms affects the performance of the routing protocol being studied. This research investigates and answers to that question by simulating the performances of Ad hoc On-demand distance vector routing protocol (AODV) when run over different MAC mechanisms(basic access or RTS/CTS)with different data transmission load. A new strategy of cross layer algorithm will be proposed based on the characteristics of reactive routing and multi-hop jumping in mobile Ad Hoc network. We try to transmit total hop count and remaining hop count over MAC layer. This parameter will be used to recalculate the contention window (IEEE 802.11) of the nodes along the route. This strategy is a cross layer algorithm and refers to the protocol design which allows layers to exchange state information in order to obtain performance gains. It will avoid data collision in MAC layer, and result in getting better performance of data transmission in IP layer. Finally, it will be shown our simulation that the proposed cross layer strategy is able to earn significant improvement than traditional algorithm. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。