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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 YouKorea Telecommunication (KT)

IEEE Wireless Communications, 2008

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Outline

• Introduction• Why Network-Based Mobility Management• Network-Based Mobility Management: PMIPv6• Qualitative Analysis• Quantitative Analysis• Concluding Remarks

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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

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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

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• 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.

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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

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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

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• 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

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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.

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Overview of PMIPv6

access authentication

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LMA address,supported address configuration mode, and so on from the policy store

12[*] S. Gundavelli, K. Leung, V. Devarapalli, K. Chowdhury and B. Patil, Proxy Mobile IPv6, Aug. 2008, IETF RFC 5213.

PBU/PBA

[*]

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Outline

• Introduction• Why Network-Based Mobility Management• Network-Based Mobility Management: PMIPv6• Qualitative Analysis• Quantitative Analysis• Concluding Remarks

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typically ashared tunnel

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Outline

• Introduction• Why Network-Based Mobility Management• Network-Based Mobility Management: PMIPv6• Qualitative Analysis• Quantitative Analysis• Concluding Remarks

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• 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)

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• 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)

• TREGHMIPv6 = 2(tmr + tra + tam)

• TREGPMIPv6 = 2tam

• DHOMIPv6 = TMD + TDAD + TAAA + TREGMIPv6

• DHOHMIPv6 = TMD + TDAD + TAAA + TREGHMIPv6

• DHOPMIPv6 = TAAA + TREGPMIPv6 + tmr + tra

Reg. to HA Reg. to CN RR. procedure to CN

Reg. to MAP

Reg. to LMA

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Impact of Wireless Link Delay (tmr)

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Impact of Delay between MN and CN(tmr+tra+tac)

reg. to CN needed

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Impact of Movement Detection Delay(TMD)

No TMD needed

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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

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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