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Handoff In All IP Networks

Handoff In All IP Networks. 2000. 5. 18 ~ 5. 19. Shinhyun Yang yangsh@hei.co.kr Hyundai Electronics Industry Co., Ltd. Overview of All IP. Characteristics of All IP Network Move IP as close to the Air network as possible (e.g. BTS). Make the radio access network simply another link layer

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Handoff In All IP Networks

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  1. Handoff In All IP Networks 2000. 5. 18 ~ 5. 19 Shinhyun Yang yangsh@hei.co.kr Hyundai Electronics Industry Co., Ltd.

  2. Overview of All IP • Characteristics of All IP Network • Move IP as close to the Air network as possible (e.g. BTS). • Make the radio access network simply another link layer • Reuse of existing IP protocols and Applications • Provide a handoff mechanism that equals to or exceeds current cellular performance, and works for both voice and data. • Main Issues of All IP Network • Mobility Management Model • Call Control Model • Addressing and Naming, and etc. 1

  3. Overview of Mobility Management • Importance of Mobility Management • One of the most important function in Mobile Communication • Pure IP protocol have never considered it. • Quality of Handoff is most important factor for Service Provider and User, where Handoff can be supported by Mobility Management functionality. • Hierarchical Mobility Management • Macro Mobility • Micro Mobility 2

  4. Handoff requirements in All IP Network From Lucent’s contribution in April (ALLIP-20000426-014_LT-Reqts_Sect_6.3.doc) 3

  5. Handoff in All IP Network • General Requirements for H/O Scheme • low latency • no data loss • scalability to a large internetwork All IP • All IP specific Issues • speedy resource reservation on IP. • reducing HA and FA overhead • soft H/O scheme 4

  6. Handoff in All IP Network (Cont.) • Mobile IP • Provides the “macro” mobility • Triangular routing and tunneling management problem • The Route Optimization provides the framework needed for fast handoff but still remain long latency problem : data loss might be occurred in inter-FA registration process • arise HA and FA bottleneck problem • Cellular IP • Solves the “micro” mobility • Minimize packet losses and degradation of QoS during handoff • Interwork with Mobile IP to support wide area mobility 5

  7. Handoff in All IP Network (Cont.) • Hierarchical Mobility management • Hierarchical FAs : a domain FA and one or more subnet FAs • Reduces handoff latency and the load on the internetwork • Hierarchical MM with Pre-resource Allocation scheme • Resource consuming • Mobile IP with SIP • Shorter path than only Mobile IP • DHCP address allocation (similar latency with Mobile IP) 6

  8. Conclusion • To reduce handoff latency, hierarchical FA architecture can be acceptable (e.g. regional registration) • It also can be the way to reduce HA or FA overload • To reduce data losses, Soft H/O or retransmission buffer scheme is required • To support Soft H/O, modified wireless layer 2 protocol or enhanced PPP is required • To support scalability to a large internetwork, mixture protocol with Mobile IP can be a promising solution. 7

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