應用於多頻道無線都會網狀網路的速率調適; 分配與路由演算機制 Rate-Adaption Channel Assignment and Routing Algorithm for Multi-Channel WirelessMAN Mesh Networks

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题名:	應用於多頻道無線都會網狀網路的速率調適;分配與路由演算機制 Rate-Adaption Channel Assignment and Routing Algorithm for Multi-Channel WirelessMAN Mesh Networks
作者:	詹烜皓;Hsuan-Hao Chan
贡献者:	資訊工程研究所
关键词:	路由演算;多頻道;無線都會網路;網狀網路;速率調適;Channel Assignment;Wireless Mesh Network;IEEE 802.16;Routing
日期:	2006-07-20
上传时间:	2009-09-22 11:43:18 (UTC+8)
出版者:	國立中央大學圖書館
摘要:	無線網狀網路提供企業與個人一個容易擴充和配置的網際網路存取方案。進一步藉由多頻道與多天線的技術，無線網狀網路將可支援更高的網路流量，以滿足現今越來越高的頻寬需求量。許多研究專注於 IEEE 802.11無線網狀網路的頻道分配與路由機制，探討此無線網路可達到的頻寬增益與網路效能在理論上的限制。然而，IEEE 802.11 在資料傳輸頻寬與傳輸距離的限制下，並不適用於都會型的無線網狀網路架構。本篇論文即針對下一代的無線寬頻last-mile網路連結： IEEE 802.16無線都會型網路，提出一個適合IEEE 802.16無線都會型網狀網路的速率調適頻道分配與路由演算機制。論文中將IEEE 802.16的TDMA特性納入考量。模擬結果顯示，所提出的速率調適頻道分配機制與現今IEEE 802.11直接移植的方法比較，不但在頻道的使用數量上較少，而且具有較高的頻道利用率。而在三個路由演算法的比較上，提出的速率調適隨機多重路徑演算法善加利用了IEEE 802.16多重調變的性質，達到了整體上較高的網路吞吐量。 Wireless mesh networks provide an easy deployed and extensi- ble solution to access Internet or communicate with each other for both enterprises and individuals. With the help of multi-channel and multi- radio, wireless mesh network can support more tra¢ c load to meet higher and higher bandwidth requirement in this modern time. There have been researches that focus on channel assignment and routing al- gorithm for IEEE 802.11 multi-channel environment to achieve better network throughout. However, the data rate and transmission range of 802.11 is limited and is not suitable for a large area metropolitan mesh network deployment. This thesis presents a rate-adaption chan- nel assignment and routing algorithm for IEEE 802.16 multi-channel multi-radio network in mesh mode which is expected as the last-mile wireless broadband connectivity. We takes 802.16 TDMA characteris- tic and modulation/rate adaption into consideration. The Simulation results show that our channel assignment procedure uses fewer chan- nels and better channel utilization than the migrated 802.11 greedy approach. Among the three comparing routing protocols, our protocol performs better in multi-rate 802.16 mesh network and results in higher aggregate throughput.
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