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Access Router Identifier (ARID) for supporting L3 mobility

Access Router Identifier (ARID) for supporting L3 mobility. Soohong Daniel Park Soohong.Park@SAMSUNG.COM Samsung Electronics. AR. AR. AP. AP. AP. MN1. MN2. L3 Handover ?. L3 Handover ?. Miscellaneous Handover in WLAN.

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Access Router Identifier (ARID) for supporting L3 mobility

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  1. Access Router Identifier (ARID) for supporting L3 mobility Soohong Daniel Park Soohong.Park@SAMSUNG.COM Samsung Electronics. Soohong Daniel Park, Samsung Electronics.

  2. AR AR AP AP AP MN1 MN2 L3 Handover ? L3 Handover ? Miscellaneous Handover in WLAN • STA doesn’t know whether it changes AP(MN1) or AR(MN2) when moving to another domain without IP layer operations or even more layers. Soohong Daniel Park, Samsung Electronics.

  3. Problem Statement • #3 There is no standardized mechanism in 802 for information exchange between mobile terminals and network attachment points. This impacts the ability to make informed decisions to select between disparate network attachment points or to initiate handoffs between heterogeneous network types or between administrative domains within a single network type. Thus there is a need to develop a standard that permits mobile terminals and network attachment points to access information on which to base effective handoff decisions. Soohong Daniel Park, Samsung Electronics.

  4. Current drawback of FMIP6 • After discovering a new nearby AP, MN sends RtSolPr in order to resolve AP identifiers to subnet router information. • If the new AP is connected to the PAR’s current interface itself, PAR MUST respond indicating that the point of attachment is known, but is connected to current interface. • Handover does not require change of CoA. • Similar drawback happens on IPv4. AR PrRtAdv (Code=2, LLA Sub-type=5) RtSolPr AP AP MN1 RtSolPr: Router Solicitation for Proxy Advertisement PrRtAdv: Proxy Router Advertisement Soohong Daniel Park, Samsung Electronics.

  5. Proposal • AP (means network attachment points) lets MN know the handover either L2 or L3 when moving to a new attachment point. • Reduced the redundant message exchanges between MN and AR when performing L2 handover. • Supporting effective handover decision to MN for doing a fast handover. Soohong Daniel Park, Samsung Electronics.

  6. Potential Solution • ARID in the MAC Management Frame. • Capability Information in the Beacon (and Probe response) can be used for letting MN know its movement whether it occurs on L2 or L3. • Simply extended value for distinguishing either L2 handover or L3. • Just let STA knows what handover tends to occur when moving to another link. • Simply managed and configured by admin. • ARID (Access Router Identifier) can be simply configured in conjunction with the SSID on the AP (network attachment points). Soohong Daniel Park, Samsung Electronics.

  7. ARID Format Beacon Probe response 0 7 15 ARID Soohong Daniel Park, Samsung Electronics.

  8. Proposed Operation - I IETF is working on this area (CAPWAP WG) AR AR aaaa aaaa bbbb AP AP AP Scanning Scanning Beacon or Probe response with ARID (aaaa) Beacon or Probe response with ARID (bbbb) MN1 MN2 aaaa ? L2 Handoff bbbb ? L3 Handoff Soohong Daniel Park, Samsung Electronics.

  9. Proposed Operation - II AR AR AR AR AR AP aaaa AP aaaa AP bbbb AP aaaa Scanning Scanning Beacon or Probe response with ARID (aaaa) Beacon or Probe response with ARID (bbbb) MN1 MN1 MN2 aaaa ? L2 Handoff bbbb ? L3 Handoff Soohong Daniel Park, Samsung Electronics.

  10. Pros and Cons • Pros • Removing unnecessary packet exchanges between MN and AR when L2 handover. • Reducing handover latency. • Well managed method against SSID. • Cons • Putting ARID in the beacon. • Limited length (8-bits of reserved field). • Requiring admin configurations. Soohong Daniel Park, Samsung Electronics.

  11. Conclusion • Develop a standard that permits mobile terminals and network attachment points to access information on which to base effective handover decisions. • Suggest to work on the solution for distinguishing either L2 or L3 handover on the 802.11 as well as heterogeneous networks. Soohong Daniel Park, Samsung Electronics.

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