| 摘要(英) |
IEEE 802.16e is viewed as a promising next-generation broadband wireless technique. It provides better transmission distance and wider bandwidth. In the documents released by WiMAX Forum, it proposes two scopes of mobility. One is ASN anchored mobility. And the other is CSN anchored mobility, which is known as R3-Reanchoring. When CSN anchored mobility is executed, it is involved in CoA update. Applying ASN Anchored Mobility prior to the CSN anchored mobility minimizes the handoff delay and packet loss.
Mobile IP is a layer 3 protocol which assists mobile station with retaining IP layer connectivity in a mobile environment. There are two versions of mobile IP. Mobile IPv6 is one of them. IETF released Hierarchical Mobile IPv6 (HMIPv6) in 2005. This RFC is an extension of mobile IPv6. It defines a conceptual anchor point router to reduce the times processing route optimization. It also defines extension header to apply HMIPv6 over IP backbone network.
In this thesis, we apply Hierarchical Mobile IPv6 to the WiMAX network architecture. The main emphasis is placed on the problem of handoff overhead. We analyze the message flow with and without R3-Reanchoring method, and consider the effects caused by the MAP location. The concept of service area is implemented to achieve reducing the load of ASN-GW and minimizing handoff delay. |
| 參考文獻 |
[1] WiMAX Forum Network Architecture – Stage 2 – Release 1.1.0, WiMAX Forum, July 2007.
[2] WiMAX Forum Network Architecture – Stage 3 – Release 1.1.0, WiMAX Forum, July 2007.
[3] D. Johnson, C. Perkins, “Mobility Support in IPv6”, IETF
RFC 3775, June 2004.
[4] R. Koodli, “Fast Handovers for Mobile IPv6”, IETF RFC 4068, July 2005
[5] H. Soliman, et al.”Hierarchical Mobile IPv6 Mobility Management (HMIPv6)”, IETF RFC 4140, Aug. 2005
[6] IEEE Standard for Local and metropolitan area networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems. IEEE
Std 802.16-2004, 2004.
[7] IEEE Standard for Local and metropolitan area networks Part 16:
Air Interface for Fixed and Mobile Broadband Wireless Access
Systems Amendment 2: Physical and Medium Access Control Layers
for Combined Fixed and Mobile Operation in Licensed Bands and
Corrigendum 1, IEEE Std 802.16e-2005 and IEEE Std 802.16-2004
/ Cor 1-2005, 2006.
[8] S. Madanapalli, Ed. ”Analysis of IPv6 Link Models for IEEE 802.16 Based Networks”, IETF RFC 4968, Aug 2007
[9] Chen, Y. and Hsieh, F. “A Cross Layer Design for Handoff in
802.16e Network with IPv6 Mobility”, Wireless Communications and
Networking Conference, pp. 3844 – 3849, 2007.
[10] Shaojian Fu, Atiquzzaman M. “Handover latency comparison of SIGMA, FMIPv6, HMIPv6, FHMIPv6”, Global Telecommunications Conference, GLOBECOM '05. IEEE ,Volume: 6, pp. 3809-3813 ,2-2 Dec. 2005 |
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