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系統識別號 U0002-3105201021461300
中文論文名稱 以負載平衡為主之模糊異質無線網路換手決策機制
英文論文名稱 Fuzzy-Based Loading Balanced Handover Decision Strategy in Heterogeneous Wireless Networks
校院名稱 淡江大學
系所名稱(中) 資訊工程學系碩士班
系所名稱(英) Department of Computer Science and Information Engineering
學年度 98
學期 2
出版年 99
研究生中文姓名 彭千祥
研究生英文姓名 Chien-Hsiang Peng
學號 697410057
學位類別 碩士
語文別 中文
第二語文別 英文
口試日期 2010-05-28
論文頁數 38頁
口試委員 指導教授-葛煥昭
委員-葛煥昭
委員-羅光志
委員-武士戎
中文關鍵字 異質無線  負載平衡  換手決策  模糊  垂直換手 
英文關鍵字 heterogeneous wireless  load balance  handover decision making  fuzzy  vertical handover 
學科別分類 學科別應用科學資訊工程
中文摘要 在未來無線通訊的發展裡,異質無線網路整合現有環境的技術是一個趨勢,它可以使用最新的無線技術,使網路達到更好更快的效能,也提供向前相容的能力,使現有無線網路能繼續使用。在這樣的環境裡我們遇到一個重大的挑戰,如何讓每一個網路存取點(NAP, Network Access Point)都有很好的系統負載並且提供每一個行動終端(MN, Mobile Node)良好的通話,因為異質環境下每一個NAP的負載能力、對MN速度容忍性和訊號強度(RSS, Receive Signal Strength)不一定相同,因此我們將模糊系統應用在異質無線網路的換手決策,並且提出一個模糊正規化的概念將各種無線網路技術的環境參數正規化使得各個網路的系統負載能在最平衡的狀態。這樣的概念保留了傳統的模糊系統應用在無線網路換手決策的優點,也讓異質無線網路整合環境中,不同無線技術的環境參數可以經由模糊正規化的程序來達到參數可以直接比較。達成了不同無線技術環境整合的NAP可以直接比較並決定出最合適的換手目標。經由實驗結果可以得知在模糊正規化的決策方法下,只要設定合適的模糊歸屬函數和模糊推論系數,便可以得到網路系統負載在最佳的狀態且優於傳統模糊系統在垂直換手決策上之應用。
英文摘要 This concept retains the traditional fuzzy system applied to the advantages of wireless network handover decision also makes integration of heterogeneous wireless network environment, the environmental parameters of different wireless technologies can be normalized by fuzzy procedures to achieve the parameters can be directly compared. Reached a different wireless technology environment can be directly compared NAP integration and determine the most appropriate handover target. The experimental results were obtained in the handover decision of fuzzy normalization approach, as long as the appropriate set of fuzzy membership functions and fuzzy inference coefficient, it can get good performance system load better than the traditional fuzzy system in the vertical handoff decision on the application.
論文目次 目錄
1 緒論 1
2 相關背景知識 4
2.1 異質無線網路換手管理(Heterogeneous Wireless Network Handover Management) 4
2.1.1 換手的分類 4
2.1.2 換手程序 5
2.1.3 垂直換手決策 5
2.2 模糊系統應用於換手決策 6
3 FUN-HODS演算法 11
3.1 模糊正規化 12
3.1.1 模糊化 13
3.1.2 模糊規則庫與推論引擎 16
3.2 換手決策 16
4 實驗模擬與結果 18
4.1 模擬環境 18
4.2 模擬結果 19
5 結論及未來研究 25
參考文獻 26
附錄—英文論文 29

圖目錄
圖1. 垂直換手決策考量參數分類 5
圖2.模糊系統 7
圖3. Adaptive Fuzzy Logic Based Handover Algorithm for Hybrid Networks 8
圖4. Block diagram of the access network selection base on MCDM fuzzy 9
圖5. FUN-HODS架構 12
圖6.模糊正規化的模糊系統 13
圖7.模糊正規化的模糊化 13
圖8. 3G、WiMAX、IEEE 802.11的RSS歸屬函數 14
圖9. 3G、WiMAX、IEEE 802.11的Velocity歸屬函數 14
圖10. 3G、WiMAX、IEEE 802.11的Loading歸屬函數 15
圖11. 換手決策流程 17
圖12. 模擬環境 18
圖13. 系統負載(T0) 20
圖14. 系統負載(T20) 20
圖15. 系統負載(T40) 21
圖16. 系統負載(T60) 21
圖17. 系統負載(T80) 22
圖18. 系統負載(T100) 22

表目錄
表1. 符號意義 16
表2. 規糊正規化與傳統糊化系統的系統負載率 19
表3. 規糊正規化與傳統糊化系統因速度過快導致的換手失敗率(速度隨機) 23
表4. 規糊正規化與傳統糊化系統因速度過快導致的換手失敗率(速度固定) 23

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[2] F. Siddiqui, S. Zeadally, S. Fowler, “Novel Architecture for Roaming between 3G and Wireless LANs”, MSAN 2005.
[3] E. Stevens-Navarro, V.W.S. Wong, “Comparison between Vertical Handover Decision Algorithms for Heterogeneous Wireless Networks”, VTC 2006.
[4] Nasser, N.; Hasswa, A.; Hassanein, H.; “Handover in fourth generation heterogeneous networks” Communications Magazine, IEEE OCT. 2006.
[5] Akyildiz, I.F.; McNair, J.; Ho, J.S.M.; Uzunalioglu, H.; Wenye Wang; “Mobility management in next-generation wireless systems” Proceedings of the IEEE Aug. 1999.
[6] Liu Xia; Jiang Ling-ge; He Chen; Liao Hong-wei; “An intelligent vertical handover algorithm in heterogeneous wireless networks” Neural Networks and Signal Processing, 2008 International Conference on June 2008
[7] Qian Zhang; Chuanxiong Guo; Zihua Guo; Wenwu Zhu; “Efficient mobility management for vertical handover between WWAN and WLAN” Communications Magazine, IEEE Nov. 2003
[8] Liu Xia; Jiang Ling-ge; He Chen; Liao Hong-wei; “An intelligent vertical handover algorithm in heterogeneous wireless networks” Neural Networks and Signal Processing, 2008 International Conference on June 2008
[9] Majlesi, A.; Khalaj, B.H.; “An adaptive fuzzy logic based handover algorithm for interworking between WLANs and mobile networks” Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on Sept. 2002
[10] Bing Hongyan; He Chen; Jiang Lingge; “Intelligent signal processing of mobility management for heterogeneous networks” Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on Dec. 2003
[11] Onel, Tolga; Ersoy, Cem; Cayirci, Erdal; Parr, Gerard A multicriteria handover decision scheme for the next generation tactical communications systems Computer Networks Volume: 46, Issue: 5, December 5, 2004, pp. 695-708
[12] Ezzouhairi, A.; Quintero, A.; Pierre, S.; “A fuzzy decision making strategy for vertical handover” Electrical and Computer Engineering, 2008. CCECE 2008.
[13] Edwards, George; Kandel, Abraham; Sankar, Ravi Fuzzy handover algorithms for wireless communication Fuzzy Sets and Systems Volume: 110, Issue: 3, March 16, 2000, pp. 379-388
[14] Cheng-Jian Lin; I-Ta Tsai; Chi-Yung Lee; “An adaptive fuzzy predictor based handover algorithm for heterogeneous network” Fuzzy Information, 2004. Processing NAFIPS '04. IEEE Annual Meeting of the June 2004
[15] Liu Xia; Ling-ge Jiang; Chen He; “A Novel Fuzzy Logic Vertical Handover Algorithm with Aid of Differential Prediction and Pre-Decision Method” Communications, 2007. ICC '07. IEEE International Conference on June 2007
[16] García-Gaytán, Cyntia; Munoz-Rodríguez, David; Soto, Rogelio Uncertainty in cellular fuzzy handover Expert Systems with Applications Volume: 15, Issue: 3-4, October 11, 1998, pp. 391-397
[17] Wu G, Havinga P.J.M., and Mizuno M. “MIRAI Architecture for Heterogeneous Network,” IEEE Communications Magazine, pp. 126-134, February 2002
[18] MStemm and RH Katz, “Vertical handover in wireless overlay networks,” Mobile Networks and Applications, pp.335-350,3(4) 1998
[19] Christoph Niedermeier, Reiner Schmid, Eiman Mohyeldin, Markus Dillinger,”Handover Management and Strategies for Reconfigurable Terminals,” Software Defined Radio Forum Contribution , Sept. 2002.
[20] Kaveh Pahlavan, Prashant Krishnamurthy, Ahmad Hatami, Worcester Polytechnic Institute, Mika Ylianttila,etc. “Handover in hybrid mobile data networks”, IEEE Personal Communications, April 2000
[21] Shen, Xuemin; Mark, Jon W. Mobility information for resource management in wireless ATM networks Computer Networks Volume: 31, Issue: 9-10, May 7, 1999, pp. 1049-1062
[22] Paolo Dadone, “Design Optimization of Fuzzy Logic Systems” ph. D Dissertation, Xrginia Polytechnic Institute and State University, May 18,2001
[23] P.M.L.Chan, YF. Hu, R.E. Sheriff, “Implementation of Fuzzy Multiple Objective Decision Making Algorithm in a Heterogeneous Mobile Environment”, IEEE Communications Magazine, Dec. 2001
[24] N. Tripathi, “Generic Adaptive Handover Algorithms using Fuzzy Logic and Neural Networks”, Ph.D. Thesis, Virginia Polytechnic Institute and State University, August 1997.
[25] ChoongHo Cho; YouChang Ko; Hyung Lee-Kwang; “Fuzzy adaptive guard channel assignment strategy for handoff in PCS system “, Fuzzy Systems, 1997., Proceedings of the Sixth IEEE International Conference
[26] Ching-Hung Lee; Chun-Jie Yu; “An intelligent handoff algorithm for wireless communication systems using grey prediction and fuzzy decision system , Networking, Sensing and Control, 2004 IEEE International Conference
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