Transient BCE for Proxy Mobile IPv6 draft-liebsch-netlmm-transient-bce-pmipv6-01.txt

1. Transient BCE for Proxy Mobile IPv6draft-liebsch-netlmm-transient-bce-pmipv6-01.txt Oliver Blume (oliver.blume@alcatel-lucent.de) Marco Liebsch (marco.liebsch@nw.neclab.eu) Ahmad Muhanna (amuhanna@nortel.com) MIPSHOP session29th July 2008 IETF#72, Dublin

2. Overview • Transient BCE  Extension to Proxy MIPv6 base protocol for handover optimization • Joint effort to specify an efficient solution from individual contributions • draft-blume-netlmm-secondary-bce-proxymip6ho-00 • draft-liebsch-netlmm-intertech-proxymip6ho-01 • draft-muhanna-netlmm-pmipv6-support-transient-coa-01 • Provides optimization for inter-MAG handoff,e.g. for 3GPP use cases

3. Design goals • Low added complexity • Avoid new messages and protocol interfaces • No additional SAs required • Meet requirements for a variety of handover cases • Approach: • Allow utilizing both previous and new connectivity as available during HO • Synchronize downlink path switch with HO characteristics

4. Use Cases • HO with previous downlink still available • Controlled late path switch • Dual radio (inter-technology) • Single radio with RAT specific forwarding  re-use existing handover optimization • Handling of late uplink packets after HO • Support forwarding of packets on the fly from pMAG after HO

5. Characteristics of a transient BCE • Single option attached to Proxy BU (new MAG – LMA) • Advanced BCE management on LMA • Maintains temporarily 2 forwarding entries in the MN‘s BCE • Ensures forwarding of uplink packets from both links (pMAG and nMAG) • Enables controlled forwarding of downlink packets (pMAG or nMAG) to suit various handover cases • Suitable for inter-technology and intra-technology handover

6. Single radio handover with tBCE–re-use 3GPP optimized handover MN nMAG pMAG LMA MN pMAG (dl,ul) IF [HO Event] Transient Attach PBU (TBoption) pMAG (dl,ul) MN PBA (TBoption, HNP) nMAG (ul) Active [HO Complete] PBU MN nMAG (dl,ul) PBA Forwarding below MAGs in the 3GPP access network, re-use 3GPP optimized handover

7. Inter-technology handover – Handover 3GPP to ePDG MN pMAG nMAG LMA MN pMAG IF2 IF1 [HO Event] Attach IKEv2 init PBU IP-CAN Session Modification PBA (HNP) MN nMAG  IKEv2 configuration payload(HNP),Address Configuration IPsec [HO Complete] IPsec

8. Inter-technology handover with tBCE MN pMAG nMAG LMA MN pMAG (dl,ul) IF2 IF1 [HO Event] Attach Transient IKEv2 init PBU (TBoption) pMAG (dl,ul) MN PBA (TBoption, HNP) nMAG (ul)  IKEv2 configuration payload(HNP),Address Configuration Activate PBU [HO Complete] IPsec pMAG (ul) MN PBA nMAG (dl,ul) Active IPsec MN nMAG (dl,ul) IPsec

9. Co-existence with PFMIP • Co-existence • Mechanisms can coexist • Different use cases • tBCE • For dual radio / inter-RAT HO (no forwarding required) • For intra-RAT HO with access specific fowarding scheme • No MAG-MAG communication • PFMIP • For single radio / intra-RAT HO • Provides a generic IP based forwarding/context transfer • Utilizes forwarding in meshed network architecture

10. Summary • Transient BCE as simple extension to PMIPv6 base protocol • Re-uses existing protocol interfaces • Utilizes new message option: Transient Binding option • Smooth migration in PMIPv6 deployment • Only involves nMAG and LMA • No interaction of pMAG and nMAG • No new SAs required, re-use existing SAs between MAG and LMA • Tailors U-plane handover procedure to various scenarios • Avoids dropping of packets on previous link • Avoids buffering on target link • Doesn‘t require synchronisation of MN and network • Complementary to PFMIP approach • Allows co-existence to suit inter- as well as intra-technology handovers

11. Way forward... • Transient BCE for PMIPv6 as work item in MIPSHOP? • Submission of Transient BCE for PMIPv6 to 3GPP

12. Questions ? ? ..... ! ! ! ? ? Comments ? ?