RE: [802.21] IEEE 802.11u requirement for IEEE 802.21
Yes this is an important requirement that needs to be addressed. There
are several comments already in place in current draft to this affect.
1] Currently Link Up indication includes info about IPAddressRenewal
(not sure if this info can be provided in all/most cases so this needs
to be made optional at best). It can also include info about new subnet
address for newly selected PoA (though one may argue about availability
of subnet address from link layer triggers).
2] LinkGoingDown indication includes MacAddress of next prospective PoA
as an optional parameter. If that information is available then using
RARP one can find IP address of prospective PoA and determine if there
will be a change in IP address.
3] Information service tries to provide subnet information for different
PoAs as part of Media Independent Neighbor maps. This could help in
figuring out PoA layout and determining a priori possible impact on
change in IP address due to specific PoA selection.
Not sure if these are adequate so other solutions welcome as well.
Best Regards,
-Vivek
> -----Original Message-----
> From: stds-802-21@ieee.org [mailto:stds-802-21@ieee.org] On Behalf Of
> stefano.faccin@nokia.com
> Sent: Thursday, November 03, 2005 3:52 PM
> To: stephen.mccann@ROKE.CO.UK; STDS-802-21@listserv.ieee.org
> Subject: RE: [802.21] IEEE 802.11u requirement for IEEE 802.21
>
> Stephen,
> thanks for the e-mail. I think this is a very important requirement,
since
> the functionality is needed as it was indicated in the various
> presentations that lead to have the requirement inserted in in TGu.
This
> is definitely a feature that caters for handoff, and I think that
802.21
> can help with this.
>
> Stefano
>
> > -----Original Message-----
> > From: ext McCann, Stephen [mailto:stephen.mccann@ROKE.CO.UK]
> > Sent: Thursday, November 03, 2005 10:13
> > To: STDS-802-21@listserv.ieee.org
> > Subject: [802.21] IEEE 802.11u requirement for IEEE 802.21
> >
> >
> > Dear all,
> > During the September 2005 meeting, IEEE 802.11u decided that
> > one of the IEEE 802.11u requirements should be forwarded to IEEE
> > 802.21 and I, errr, sort of forgot to do this after the meeting.
> >
> > So here is the requirement, which I hope we can discuss at the
> > joint IEEE 802.11u/IEEE 802.21 meeting.
> >
> > "Define functionality by which APs can provide information which
> > will enable a STA to determine whether or not roaming to a candidate
> > AP would require re-configuration (automatic or manual) of layer
> > 3 networking"
> >
> > There you go. Some extra notes which are associated with this
> > requirement are:
> >
> > "This could be achieved by the APs advertising either information
> > about the L3 routers accessible through them (ARID) or by
> > identifying the ESS to which the AP is connected. However other
> > solutions are not precluded."
> >
> > Kind regards
> >
> > Stephen
> >