在本論文中，我們提出利用導航路徑的換手機制：其中，我們假設行動台配備有全球衛星導航系統，可提供路徑計算及路徑的行進方向。根據行動台的導航路徑，選擇可以容許換手延遲並且提供最長服務時間的目標基地台，再以執行換手前後行動台接收信號強度最接近為條件，決定觸發換手的時間。在我們的數值結果中，證明相較於現有的文獻，我們提出的方法可以進一步的減少換手次數。

In this thesis, we propose a new handover scheme from a navigation perspective, where we assume the mobile stations have GPS navigation with route calculation and directions of the route to take. According to the calculated route, we can select the target base station which can tolerates handover delay and provides longest service time. On the timing to trigger the handover, we propose using the timing when the received signal strength difference between the original and the new service base stations is minimized. Our numerical results show that the proposed handover scheme performs better than existing schemes with respect to the number of handovers.

摘要-i
ABSTRACT-ii
誌謝-iv
目錄-v
表目錄-vii
圖目錄-viii
第一章 緒論-1
1.1 前言-1
1.2 研究背景-1
1.2.1 IEEE 802.16標準沿革-1
1.2.2 換手機制簡介-3
1.3 研究動機-4
1.4 研究目的-5
1.5 論文架構-5
第二章 背景知識與相關研究-6
2.1 前言-6
2.2 IEEE 802.16e MAC層-6
2.2.1 QoS機制-8
2.2.2 換手程序-9
2.3 相關研究-17
第三章 應用路徑導航之換手機制-28
3.1 前言-28
3.2 系統假設28
3.3 演算法31
3.3.1 尋找目標基地台-31
3.3.2 決定觸發換手時間-35
第四章 模擬實驗與分析-38
4.1 前言-38
4.2 模擬環境-38
4.3 模擬參數設定-41
4.4 模擬結果-42
第五章 結論與未來工作-45
參考文獻-46

[1] IEEE Standard for Local and Metropolitan Area Networks - Part 16: Air Interface for Fixed Broadband Wireless Access Systems, IEEE Standard 802.16-2004, Oct. 2004.
[2] IEEE Standard for Local and Metropolitan Area Networks - Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems, IEEE Standard 802.16e, Feb. 2006.
[3] A. K. Salkintzis, M. Hammer, I. Tanaka, and C. Wong, “Voice Call Handover Mechanisms in Next-Generation 3GPP Systems,” IEEE Communications Magazine, vol.47, no.2, pp.46-56, Feb. 2009.
[4] I. Ali, A. Casati, K. Chowdhury, K. Nishida, E. Parsons, S. Schmid, and R. Vaidya, “Network-Based Mobility Management in the Evolved 3GPP Core Network,” IEEE Communications Magazine, vol.47, no.2, pp.58-66, Feb. 2009.
[5] R.-Y. Kim, I. Jung, X. Yang and C.-C. Chou, “Advanced Handover Schemes in IMT-Advanced Systems,” IEEE Communications Magazine, vol.48, no.8, pp.78-85, Aug. 2010.
[6] Official U.S. Government information about the Global Positioning System (GPS) and related topics, http://www.gps.gov/
[7] J.-S. Kim and J.-H. Kim, “Handover Scheme Using Uplink and Downlink Channel Information in IEEE 802.16e Systems,” IEEE Vehicular Technology Conference, pp.1-5, May 2010.
[8] S. Choi, G.-H. Hwang, T. Kwon, A.-R. Lim, and D.-H. Cho, “Fast Handover Scheme for Real-Time Downlink Services in IEEE 802.16e BWA System,” Vehicular Technology Conference, vol.3, pp. 2028- 2032, Jun. 2005.
[9] D. H. Lee, K. Kyamakya and J. P. Umondi, “Fast Handover Algorithm for IEEE 802.16e Broadband Wireless Access System,” International Symposium on Wireless Pervasive Computing, pp.6, Jan. 2006.
[10] H. Fattah and H. Alnuweiri, “A New Handover Mechanism for IEEE 802.16e Wireless Networks,” International Wireless Communications and Mobile Computing Conference, pp.661-665, Aug. 2008.
[11] H.-G. Choi, J. Jeong and H. Choo, “Cost-Effective Target BS Selection Scheme in IEEE 802.16e networks,” Telecommunication Networks and Applications Conference, pp.99-103, Dec. 2007.
[12] R. Ellouze, M. Gueroui and M. A. Alimi, “Optimising Handover for Real-Time Flows in Mobile WiMAX Network,” IEEE Symposium on Computers and Communications, pp.40-45, Jul. 2009.
[13] P. Boone, M. Barbeau and E. Kranakis, “Strategies for Fast Scanning and Handovers in WiMAX/802.16,” International Conference on Access Networks & Workshops, pp.1-7, Aug. 2007.
[14] P. Boone, M. Barbeau and E. Kranakis, “Using Time-of-Day and Location-Based Mobility Profiles to Improve Scanning During Handovers,” IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks, pp.1-6, Jun. 2010.
[15] J. Park, S. Oh, J. Jeong and H. Choo, “Fast Handover Scheme Based on Mobile Locations for IEEE 802.16e Networks,” International Conference on Computational Science and Its Applications, pp.62-67, Jul. 2009.
[16] 方偉庭，“應用移動軌跡預測於IEEE 802.16e硬式換手機制之研究”，碩士論文，國立高雄第一科技大學，2010。
[17] V. Erceg, L. J. Greenstein, S. Y. Tjandra, S. R. Parkoff, A. Gupta, B. Kulic, A. A. Julius, and R. Bianchi, “An Empirically Based Path Loss Model for Wireless Channels in Suburban Environments,” IEEE Journal on Selected Areas in Communications, vol.17, no.7, pp.1205-1211, Jul. 1999.
[18] P.-H. Tseng and K.-T. Feng, “A Predictive Movement Based Handover Algorithm for Broadband Wireless Networks,” IEEE Wireless Communications and Networking Conference, pp.2834-2839, Apr. 2008.
[19] O. C. Ozdural and H. Liu, “Mobile Direction Assisted Predictive Base Station Switching for Broadband Wireless Systems,” IEEE International Conference on Communications, pp.5570-5574, Jun. 2007.
[20] Z. Dai, R. Fracchia, J. Gosteau, P. Pellati, and G. Vivier, “Vertical Handover Criteria and Algorithm in IEEE 802.11 and 802.16 Hybrid Networks,” IEEE International Conference on Communications, pp.2480-2484, May 2008.
[21] J.-Y. Baek, D.-J. Kim, Y.-J. Suh, E.-S. Hwang, and Y.-D. Chung, “Network-Initiated Handover Based on IEEE 802.21 Framework for QoS Service Continuity in UMTS/802.16e Networks,” IEEE Vehicular Technology Conference, pp.2157-2161, May 2008.
[22] T. Bchini, N. Tabbane, E. Chaput, S. Tabbane, and A.-L. Beylot, “Interaction & Handover between IEEE 802.16e and DVB-S/RCS using MSCTP Protocol,” IEEE Symposium on Computers and Communications, pp.46-53, Jul. 2009.
[23] WiMAX System Evaluation Methodology V2.0, WiMAX Forum, Dec. 2007.