IP Mobility Support for QoS over Heterogeneous Networks

Transcription

1 IP Mobility Support for QoS over Heterogeneous Networks Eun Kyoung PAIK Feb. 7-9, 2007 Future Technology Lab. KT

2 Contents Introduction Network Topology Perspective Multihoming Network Layer Perspective Network Mobility MANEMO/ NETLMM WiBro Conclusion 2

3 Internet QoS Network Topology Perspective End-to-End QoS Access Network Internet Access Network Network Layer Perspective Bottom-to-UP, Top-to-Down QoS APP L3 L2 L1 APP L3 L2 L1 Where is the bottleneck against QoS? 3

4 IP Mobility QoS Traditionally, Wireless Access considered the Bottleneck QoS Support for Wireless Access 4

5 How Does IP Mobility Support QoS? New IP Mobility Approaches From the Network Topology View Enhance Wireless Access: Multihoming Access Network Internet Access Network 5

6 How Does IP Mobility Support QoS? New IP Mobility Approaches From the Network Layer View Enhance Application Layer: Mobile Router Enhance Network Layer: Mobility Management Network-based Mobility Management (NETLMM) Integration of Infra-structured and Infra-less Network Protocols (MANEMO) Enhance L1/L2: WiBro APP L3 L2 L1 APP L3 L2 L1 6

7 Multihoming of Mobile Hosts/Routers Mobile Node listens Multiple Prefixes Mobile Node configures Multiple Addresses Mobile Node has Multiple Interfaces Mobile Node can access more than one link Multiple Wireless Path to the Internet Prefix A:: Link1 Prefix B:: Link2 7

8 Multihoming: Goals and Benefits Session Load Goals Space Time Access technology Quantity Quality Benefits Ubiquitous access Fault tolerance (Reliability) Load sharing Load balancing Preference setting QoS: Meet User s Preferred Service Quality by Selecting Wireless Path 8

9 Multihoming Issues for QoS Load Sharing Load Balancing Preference Setting Prefix A:: Prefix B:: Link1 Link2 Source Address Selection Source Address Selection Mobile Router Selection Ref. C. Ng, E. Paik, T. Ernst, and M. Bagnulo, Analysis of Multihoming in Network Mobility Support, IETF I-D 9

10 Multiple Path Selection An access network has its own characteristics Bandwidth Charging policy QoS support Security support etc. Traffic Flow An application or a user wants customized service Multiple Path Selection A multihomed mobile host/router support various requirements of users A multihomed mobile host/router can select appropriate access network according to the requirement of the traffic 10

11 Multiple Path Selection 11

12 Application Layer QoS: Mobile Router Mobile Router can contribute QoS at Application Layer Adaptive CODEC on Mobile Router With Network Information Application Cache on Mobile Router With Frequently-accessed/High-load Applications 12

13 Network Layer QoS: Mobility Management New IP Mobility Management Protocols to help at Network Layer NETLMM, PMIP: Network-based Mobility Management MANEMO: Integration of Infra-structured and Infra-less Network Protocols 13

14 NETLMM (Network-based Localized Mobility Management) New Design Paradigm A network-based, localized mobility protocol No mobile node software to specifically implement localized mobility management No requirement for a network interface to change IP address when the mobile node changes to a new router 14

15 NETLMM LMA (Local Mobility Anchor) advertises network prefix Mobile Node (MN) configures its address from LMA s prefix MAG LMA1 NetLMM Domain LMA2 MAG MN does not change its IP address when it moves between MAGs (Mobile Access Gateways) MN@LMA1 MN@LMA2 15

16 Host-Based Mobility Support vs. Network-Based Mobility Support Previous Focus in IETF Mobile node-side support at the IP layer Supporting localized mobility management for a Mobile IPv6 node New Global Mobility Management Approaches other than Mobile IPv6 Decouple Localized mobility management approach from Global mobility management protocol More modular mobility management system design More longevity and an easier evolution path 16

17 Proxy MIP (PMIP) An embodiment of the standard Mobile IP framework in which an MIP client resides in the access network and performs IP mobility on behalf of Mobile Node MN s HA CN 2 HoA Internet HoA-CoA 3 binding CoA registration 1 moving AR 4 CoA MN 17

18 Mobile Node PMIP Approach Mobile Node does not support MIP functionality IP Mobility is transparent to the Mobile Node Access Network MIP client resides in the access network and performs Mobile IP procedures on behalf of Mobile Node Home Agent Does not add special behavior to MIP to support PMIP 18

19 Mobility Management of WiMAX with PMIP Proxy-MIP: MIP Client resides in ASN-GW MSS ASN CSN ASP FA HA Internet IP IP GRE IP LNK GRE IP LNK MIP IP IP LNK MIP IP IP LNK IP LNK IP LNK MSS: Mobile Subscriber Station ASN: Access Service Network CSN: Connectivity Service Network ASP: Access Service Provider FA: Foreign Agent HA: Home Agent GRE: Generic Routing Encapsulation tunnel 19

20 MANEMO: MANET for NEMO NEMO (Network Mobility) vs. MANET Infrastructure NEMO Mobile Router serves Mobile Network Nodes Global Mobility Efficiency MANET No Infrastructure All nodes can operate as routers Local Mobility Efficiency MANEMO Benefits Coverage extension Nested mobility Route optimization Scalability 20

21 Integration of NEMO and MANET A NEMO as a MANET node e.g., inter NEMO communication A NEMO includes MIP6 nodes or MANET nodes e.g., intra NEMO communication Internet AR 21

22 MANEMO Internet AR 22

23 MANEMO Internet AR 23

24 WiBro WiBro enhances Mobility QoS at L1/L2 with its nature as follows: High Data Rate Maximize sector/user throughput Broad bandwidth Mobility Vehicular speed mobility (more than 60km/h) Support IP Mobility Full Coverage Various types of cell: Macro(1Km), Micro(400m), Pico(100m) Low Cost Improve spectral efficiency 24

25 Issues Is the Current Internet Architecture Enough for Mobility QoS? 25

26 Contact