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

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Nov 08, 2023 216 likes •289 views

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

SLIDE 1

Fast Handovers for 802.11

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

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.

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

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?

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)

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