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研究生:楊子興
研究生(外文):Yang, Tzu-Hsing
論文名稱:WiMAX環境下以停留時間為基礎的ASN-GW重新定錨演算法
論文名稱(外文):A Residence-Time-Based ASN-GW Relocation Algorithm for WiMAX Networks
指導教授:簡榮宏簡榮宏引用關係
指導教授(外文):Jan, Rong-Hong
學位類別:碩士
校院名稱:國立交通大學
系所名稱:資訊科學與工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
畢業學年度:97
語文別:英文
論文頁數:36
中文關鍵詞:WiMAX網路ASN-GW重新定錨負載平衡
外文關鍵詞:WiMAX NetworksASN-GW relocationLoad balance
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在WiMAX點對點網路架構(WiMAX End-to-End Network Architecture)中,為了降低換手(Handover)延遲,當行動裝置(Mobile Station)在存取服務網路(Access Service Network)以及基地台(Base Station)之間移動時,會使用存取服務網路換手(ASN anchored mobility)。然而在行動裝置都不更換定錨點的狀況下,存取服務網路換手會導致存取服務網路閘道器(ASN Gateway)的負載大幅增加。因此,行動裝置需要一個機制來決定何時執行重新定錨(Relocation),以及決定需要重新定錨的行動裝置的數量及對象。在本篇論文中,我們提出了一個以平均停留時間為基礎的存取服務網路重新定錨演算法,在適當的時機針對適合的行動裝置進行重新定錨。模擬的結果顯示出,我們提出的演算法可以有效的降低與穩定存取服務網路閘道器的負載情形,並且降低了整個系統在進行重新定錨的負擔。
In the WiMAX End-to-End Network Architecture, the mobile station (MS) performs Access Service Network (ASN) anchored mobility to lower handoff latency when it moves between base stations (BSs) and ASNs. However, the ASN anchored mobility will induce a heavy load of ASN gateway (ASN-GW). Thus, relocating anchored ASN-GW for the MS is needed. It is a challenge for system designers to decide when to perform ASN-GW relocation, how many MSs should be relocated and which MSs should perform relocation. In the thesis, we propose an average residence time based (ART-based) ASN-GW relocation algorithm to determine an appropriate time and select a set of MSs to relocate their anchored ASN-GWs. The simulation results show that the ART-based ASN-GW relocation algorithm can reduce and steady the loads of ASN-GWs and decrease the cost for performing relocations.
摘要 i
Abstract ii
致謝 iii
Contents iv
List of Figures v
List of Tables vi
Chapter 1 Introduction 1
Chapter 2 Related Work 7
Chapter 3 ASN-GW Relocation Algorithm 10
3.1 Mobility Selection 10
3.2 Relocation Strategy 13
3.2.1 Mobile Station Selection 13
3.2.2 Relocation Timing Selection 15
Chapter 4 Simulation 24
4.1 Simulation Environment 24
4.2 Simulation Results 26
Chapter 5 Conclusion 34
Reference 35
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[2] IEEE Std 802.16e-2005TM, IEEE Standard for Local and Metropolitan Area Networks - Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems, Feb 2006.
[3] WiMAX Forum. [Online] http://www.wimaxforum.org
[4] WiMAX Forum Proprietary, ”WiMAX End-to-End System Architecture (Stage 2: Architecture Tents, Reference Model and Reference Points, Stage3: Detailed Protocols and Procedures),” January 11, 2008 Release 1.2.1.
[5] C. Perkins, Ed., ”IP Mobility Support for IPv4,” RFC 3344, Internet Engineering Task Force, August 2002.
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[9] F. Heissenhuber, W. Fritsche, and A. Riedl, ”HA Redundancy and Load Balancing in Mobile IPv6,” in Proceedings of the 5th International Conference Broadband Communications, pp. 235-244, Hong Kong, Nov 1999.
[10] S. Pack, T. Kwon, and Y. Choi, ”A mobility-based load control scheme at mobility anchor point in hierarchical mobile IPv6 networks,” in Proceedings of the 47th annual IEEE Global Telecommunications Conference (GLOBECOM 2004), vol. 6, pp. 3431-3435, Nov 2004.
[11] A.-C. Pang, Y.-B. Lin, H.-M. Tsai, and P. Agrawal, ”Serving radio network controller relocation for UMTS All-IP networks,” IEEE J. Select.Areas Commun., vol. 22, May 2004, pp. 617-629.
[12] Z.-H. Liu, S.-Y. Pan, and J.-C. Chen, ”Access service network (ASN) gateway relocation algorithms in WiMAX networks,” In Proceedings of IEEE International Conference on Communications (ICC 2008), pp. 2674-2679, May 2008.
[13] S. Floyd and V. Jacobson, ”Random early detection gateways for congestion avoidance,” IEEE/ACM Transactions on Networking, vol. 1, issue 4, pp. 397-413, Aug. 1993.
[14] M. R. Spiegel, Schaum’s Outline of Statistics. McGraw-Hill, Dec. 1998.
[15] ”The network simulator - ns-2.” http://www.isi.edu/nsnam/ns/.
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