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研究生:盧尉然
研究生(外文):We-Ran Lu
論文名稱:行動無線網路的請求允許控制機制
論文名稱(外文):Call Admission Control Scheme in Wireless Mobile Network
指導教授:王金龍王金龍引用關係
指導教授(外文):作者未提供
學位類別:碩士
校院名稱:銘傳大學
系所名稱:資訊傳播工程學系碩士班
學門:傳播學門
學類:一般大眾傳播學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:英文
論文頁數:36
中文關鍵詞:佇列換手請求請求允陰惆蹌魖謘B服務品質保證
外文關鍵詞:handoffQoSCACQueuing
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末來的通訊網路是以提供多種服務合在一起為目的。在資源管理中請求允陰惆蹌魖?(Call Admission Control) 成為一個重要的角色,它提供無線網路裡組合的各類服務的服務品質保證 (QoS)。我們提供一個全新含有緩衝區的請求允陰惆蹌魖謘A其目的是為了保障新的請求 (new call) 和換手請求 (handoff call) 的服務品質。利用發展的佇列模組來判斷門檻值 (Threshold) 的多少,它被用來指定換手請求能使用頻寬的大小。此外,提出來的新機制採用了虛擬頻寬來改善換手請求的中斷率 (dropping rate),並且利用這個新機制允陶﹞懋s的請求在被使用的頻寬使高於門檻值時,有相當的機率能使用頻寬,這是為了減少新的請求中斷 (blocking rate)。最後從模擬實驗中可以看出來,我們所提出來的機制比現有機制的新的請求中斷和換手中斷有好的表現。
The purpose of future telecommunications networks is to provide multiple services with together. To support various combined multiple services with quality of service (QoS) requirement in these wireless networks, the call admission control (CAC) plays an important role in resource management. We propose a novel call admission control scheme with buffer to guarantee QoS for both new calls and handoff calls. The queuing model is developed to estimate the threshold, which determines the channels dedicated to the handoff calls. In addition, the proposed scheme adopts the pseudo channel to improve the dropping rate of handoff calls, and employs a new mechanism to partially allocate channels for new calls when the channel occupancy is higher than threshold in order to refine the blocking rate. From the simulation, the proposed scheme significantly improves the dropping rate and the blocking rate in comparison with the existing methods
Content
摘要 i
Abstract ii
誌謝 iii
Content iv
List of Figures v
Chapter 1 Introduction 1
Chapter 2 Related Works 4
2.1 COMPLETE SHARING POLICY 4
2.2 GUARD CHANNEL SCHEME 4
2.3 RESERVATION RESOURCE SCHEME 5
Chapter 3 Proposed Call Admission Control Scheme 8
3.1 CHANNEL ASSIGNMENT WITH PSEUDO CHANNEL 9
3.2 CHANNEL ASSIGNMENT WITH PSEUDO CHANNEL AND PROBABILITY 12
3.3 ADAPTIVE THRESHOLD SCHEME 14
Chapter 4 Simulation Results 17
Chapter 5 Conclusion 28
Reference 29


List of Figures
Fig. 1. Guard channel scheme 5
Fig. 2. Our proposed scheme model 8
Fig. 3. Flow chart of channel 9
Fig. 4. State transition diagram of the scheme with pseudo channel 10
Fig. 5. State transition diagram for the scheme with pseudo channel and probability 12
Fig. 6. Probability of accessing reserved channel of new call 13
Fig. 9. New call blocking probability 18
Fig. 10. Handoff call dropping probability 18
Fig. 11. Video and data of handoff call dropping probability 19
Fig. 12. Bandwidth utilization 19
Fig. 13. Different adaptive of new call blocking probability 20
Fig. 14. Different adaptive of handoff call dropping probability 21
Fig. 15. Different adaptive of video of handoff call dropping probability 21
Fig. 16. Different adaptive of data of handoff call dropping probability 22
Fig. 17. Different adaptive of bandwidth utilization 22
Fig. 18. Different function of new call blocking probability 23
Fig. 19. Different function of handoff call dropping probability 24
Fig. 20. Different of video of handoff call dropping probability 24
Fig. 21. Different of data of handoff call dropping probability 25
Fig. 22. Different function of bandwidth utilization 25
Fig. 23. New call blocking probability 26
Fig. 24. Different of handoff call dropping probability 27
Fig. 25. Different pseudo channel of bandwidth utilization 27
Reference
[1] Xiaoyuan Luo, Bo Li, Thng, I.L.-J, Yi-Bing Lin and Chlamtac, I., “An adaptive measured-based preassignment scheme with connection-level QoS support for mobile networks”, IEEE Transactions on Wireless Communications, vol.1, no.3, pp.521 -530, July 2002
[2] Wei Zhuang, Bensaou, B. and Kee Chaing Chua, “Adaptive quality of service handoff priority scheme for mobile multimedia networks”, IEEE Transactions on Vehicular Technology, vol.49, no.2, pp.494 -50, March 2000
[3] Huan Chen, Kumar, S and Kuo, C.-C.J., “Dynamic call admission control scheme for QoS priority handoff in multimedia cellular systems”, IEEE Wireless Communications and Networking Conference, vol.1, pp.114-118, March 2002
[4] Islam, M.M., Murshed, M. and Dooley, L.S., “New mobility based call admission control with on-demand borrowing scheme for QOS provisioning”, Information Technology, Coding and Computing [Computers and Communications], 2003. Proceedings ITCC, 2003 International Conference on, pp. 263 -267, April 28-30, 2003.
[5] Yi Zhang and Derong Liu, “An adaptive algorithm for call admission control in wireless networks”, Global Telecommunications Conference, 2001 GLOBECOM ''01 IEEE, vol.6, pp.3628 -3632, Nov, 2001
[6] Myung Il Kim and Sung Jo Kim, “A 2-level call admission control scheme using priority queue for decreasing new call blocking & handoff call dropping”, IEEE Transactions on Vehicular Technology Conference, 2003, The 57th IEEE Semiannual , Vol.1 , pp.22-25, April, 2003
[7] Yuguang Fang and Yi Zhang, “Call admission control schemes and performance analysis in wireless mobile networks”, IEEE Transactions on Vehicular Technology, vol.51, no.2, March 2002
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