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IEEE Wireless Communications, 2008 Mobility Management for All-IP Mobile Networks: Mobile IPv6 vs. Proxy Mobile IPv6 Ki-Sik Kong; Wonjun Lee; Korea University Youn-Hee Han; Korea university of Technology and Education Myung-Ki Shin; Electronics and Telecommunications Research Institute (ETRI) HeungRyeol You Korea Telecommunication (KT) 1 Outline • • • • • • Introduction Why Network-Based Mobility Management Network-Based Mobility Management: PMIPv6 Qualitative Analysis Quantitative Analysis Concluding Remarks 2 Introduction • “anywhere, anytime, and any way” high-speed Internet access – IEEE 802.16d/e, WCDMA – IETF, 3GPP, ITU-T • All-IP mobile networks – Expected to combine the Internet and telecommunication networks • Mobility management – Location Management – Handover Management 3 Introduction (cont.) • Mobile IPv4, Mobile IPv6 – Handover latency, packet loss, and signaling overhead – slowly deployed in real implementations – “the handover latencies associated with MIPv4/v6 do not provide the quality of service (QoS) guarantees required for real-time applications” • Proxy Mobile IPv6 (PMIPv6) – the IETF NETLMM WG – Network-based – expected to expedite the real deployment of IP mobility management 4 • Global Mobility Management Protocol [$] – A mobility protocol used by the mobile node to change the global, end-to-end routing of packets when movement causes a topology change. • Localized Mobility Management [$] – Any protocol that maintains the IP connectivity and reachability of a mobile node when the mobile node moves – signaling is confined to an access network. [$] J. Kempf (DoCoMo), Problem Statement for Network-Based Localized Mobility Management (NETLMM), April 2007, IETF RFC 4830. 5 Why Network-Based Mobility Management? • Mobile IPv4/6, hierarchical Mobile IPv6 (HMIPv6), fast handover for Mobile IPv6 (FMIPv6) – Require protocol stack modification of the MN • Increased complexity • Network-based mobility management approach – the serving network handles the mobility management on behalf of the MN – the MN is not required to participate in any mobility-related signaling 6 salient features and advantages of Proxy Mobile IPv6 (PMIPv6) • Deployment perspective – does not require any modification of MNs • expected to accelerate the practical deployment – multiple global mobility management protocols can be supported • Performance perspective – Host-based approach • mobility related signaling and tunneled messages exchanged on the wireless link • Wireless channel access delay and wireless transmission delay – Network-based network layer approach • the serving network controls the mobility management on behalf of the MN – No additional signal on the wireless link 7 • Network service provider perspective – network-based mobility management • enhance manageability and flexibility – enabling network service providers to control network traffic – Easily be expected from legacy cellular system, such as IS-41, GSM • Similar to GPRS – PMIPv6 could be used in any IP-based network 8 Network-Based Mobility Management: PMIPv6 • Primary features [4][8] – – – – – Support for unmodified MNs Support for IPv4 and IPv6 Efficient use of wireless resources Link technology agnostic Handover performance improvement • extends MIPv6 signaling and reuses many concepts • Support an MN in a topologically localized domain [4] J. Kempf, “Problem Statement for Network-Based Localized Mobility Management (NETLMM),” IETF RFC 4830, Apr. 2007. [8] J. Kempf, “Goals for Network-Based Localized Mobility Management (NETLMM),” IETF RFC 4831, Apr. 2007. 9 Overview of PMIPv6 access authentication 10 LMA address, supported address configuration mode, and so on from the policy store 11 PBU/PBA [*] [*] S. Gundavelli, K. Leung, V. Devarapalli, K. Chowdhury and B. Patil, Proxy Mobile IPv6, Aug. 2008, IETF RFC 5213. 12 Outline • • • • • • Introduction Why Network-Based Mobility Management Network-Based Mobility Management: PMIPv6 Qualitative Analysis Quantitative Analysis Concluding Remarks 13 typically a shared tunnel 14 15 Outline • • • • • • Introduction Why Network-Based Mobility Management Network-Based Mobility Management: PMIPv6 Qualitative Analysis Quantitative Analysis Concluding Remarks 16 • handover latency – the time that elapses between the moment the layer 2 handover completes and the moment the MN can receive the first data packet after moving to the new point of attachment. – – – – the movement detection delay (TMD), address configuration delay (TDAD), the delay involved in performing the AAA procedure (TAAA), and location registration delay (TREG) 17 • TMD = (MinRtrAdvInterval + MaxRtrAdvInterval)/4 • TDAD = RetransTimer × DupAddrDetectTransmits • TAAA = 2 × 2ta = 4ta • TREGMIPv6 = 2(tmr + tra + tah) + 2(tmr + tra + tac) + 2(tmr + tra + tah+ thc) Reg. to HA Reg. to CN RR. procedure to CN • TREGHMIPv6 = 2(tmr + tra + tam) Reg. to MAP • TREGPMIPv6 = 2tam Reg. to LMA • DHOMIPv6 = TMD + TDAD + TAAA + TREGMIPv6 • DHOHMIPv6 = TMD + TDAD + TAAA + TREGHMIPv6 • DHOPMIPv6 = TAAA + TREGPMIPv6 + tmr + tra 18 Impact of Wireless Link Delay (tmr) 19 Impact of Delay between MN and CN (tmr+tra+tac) reg. to CN needed 20 Impact of Movement Detection Delay (TMD) No TMD needed 21 Conclusion • first to provide qualitative and quantitative analyses of MIPv6 and PMIPv6 – demonstrate the superiority of PMIPv6 • PMIPv6 could be considered a promising compromise between telecommunications and Internet communities. – reflects telecommunication operators’ favor, enabling them to manage and control their networks more efficiently • interactions between MIPv6 and PMIPv6 is possible • Future research – explore cross layering • e.g., PMIPv6 over IEEE 802.11 or 802.16e networks – route optimization – fast handover 22 comments • Host-based vs. Network-based mobility management – Mobile IPv6 HiMIPv6, FMIPv6 Proxy Mobile IPv6 • Handover performance of PMIPv6 – QoS is easy to be achieved – Multiple interface • Soft handover, fault tolerance, load balancing – seamless handover • Proxy Mobile IPv6 + NEMO 23