博碩士論文 93522027 詳細資訊




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姓名 詹烜皓(Hsuan-Hao Chan)  查詢紙本館藏   畢業系所 資訊工程學系
論文名稱 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 forMulti-Channel WirelessMAN Mesh Networks )
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摘要(中) 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。
摘要(英) 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.
關鍵字(中) ★ 路由演算
★ 多頻道
★ 無線都會網路
★ 網狀網路
★ 速率調適
關鍵字(英) ★ Channel Assignment
★ Wireless Mesh Network
★ IEEE 802.16
★ Routing
論文目次 1 Introduction 1
1.1 Multi-channel wireless networks . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Wireless mesh networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 The IEEE 802.16 standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Goal of the thesis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5 Thesis organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Related Works 8
2.1 Multi-channel hidden terminal . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Multi-channel and multi-radio cooperation . . . . . . . . . . . . . . . . . . . 12
2.3 Multi-channel wireless mesh networks . . . . . . . . . . . . . . . . . . . . . 13
2.4 Routing Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.5 Cellular Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3 Proposed Scheme 18
3.1 IEEE 802.16 Control Messages . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2 Proposed Channel Assignment . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3 Proposed Routing Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4 Simulation 27
4.1 Channel Usage and Utilization . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.2 RA-CA and RA-Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5 Conclusion 37
Reference 39
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指導教授 吳曉光(Hsiao-kuang Wu) 審核日期 2006-7-23
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