Fast Handovers for 802.11 draft-mccann-mobileip-80211fh-01.txt - - PowerPoint PPT Presentation

fast handovers for 802 11
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Fast Handovers for 802.11 draft-mccann-mobileip-80211fh-01.txt - - PowerPoint PPT Presentation

Fast Handovers for 802.11 draft-mccann-mobileip-80211fh-01.txt Anticipation is Difficult Mobile IP Usually, the firmware/driver makes autonomous, IP real-time handover decisions. Device Driver PCMCIA Bus MLME.Scan-Request() may


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SLIDE 1

Fast Handovers for 802.11

draft-mccann-mobileip-80211fh-01.txt

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SLIDE 2

Anticipation is Difficult…

PCMCIA Bus

Device Driver IP Mobile IP Firmware Chipset

MLME.Scan-Request() may not be exported above

Usually, the firmware/driver makes autonomous, real-time handover decisions.

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SLIDE 3

But Not Impossible

PCMCIA Bus

Device Driver IP Mobile IP Chipset

“HostAP” or “SoftWiFi” model

Exotic device driver, not possible with all cards. Firmware Emulation

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SLIDE 4

But I’m Doing it in the Lab!

  • Are these experiments implementing the

exotic device driver?

  • Is the SNR information really real-time?
  • Or is it just updated every few seconds?

Can we resolve this here during face-to-face discussion?

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SLIDE 5

802.11 Triggers

  • Reassociation Request

– Contains old AP, new AP MAC address – Enables IAPP operation

  • Security

– WEP? (not secure) – 802.1X? (secure, but not fast across subnets) – PANA? (not ready yet)

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SLIDE 6

Next Steps

  • Need more work in IEEE

– Fast, secure, inter-subnet L2 triggers

  • Perhaps implement “tunnel based” between APs

– Improve beacon scanning time

  • Is anticipation realistic for 802.11?
  • Relationship of PrRtSol/Adv to CARD?
  • Fate of draft-80211fh

– WG item? Needs updating to reflect fast-05 (or -06…)