Jeff,
Thanks for your reply. I have heard the 802.11r Fast roaming. What I
am looking for now is the pre-emptive roaming like the one in the
following
link
http://www.ciscopress.com/articles/a...02282&seqNum=2.
It is all up to the station, and AP seems not involved.
Yong
On Oct 15, 7:49 pm, Jeff Liebermann <je...@cruzio.com> wrote:
> On Wed, 15 Oct 2008 15:43:19 -0700 (PDT), yozh...@gmail.com wrote:
> >Anyone know a Wifi adapter that supports pre-emptive roaming?
>
> Methinks you're thinking of 802.11r (Fast Roaming):
> <http://en.wikipedia.org/wiki/IEEE_802.11r>
> You gotta have support for that on both the access point and the
> client. 802.11r was passed by the IEEE in July 2008, so I expect that
> there will be supported products available. However, I have no
> experience with any and cannot supply any vendor names.
>
> >It can
> >find the AP using the AP list got from background scan, instead of do
> >a scan
> >at the time of roaming?
>
> It takes more than that to switch association from one AP to another.
> The handoff ritual is listed in the Wikipedia article.
>
> >I have tried Intel (R) PRO/Wireless 3945 ABG (enabled "aggressive
> >roaming") and
> >Linksys WUSB600N in an IBM notebook. They both will take about 5 or 6
> >seconds
> >to connect to the other AP after I bring down the current associated
> >AP.
>
> That's about right for Proset. All it does it does is produce a
> disconnect at the client end (not a normal thing to do), which forces
> the card to scan. No background scanning involved. With 802.11r, it
> should be less than 50 msec.
>
> --
> Jeff Liebermann je...@cruzio.com
> 150 Felker St #D http://www.LearnByDestroying.com
> Santa Cruz CA 95060http://802.11junk.com
> Skype: JeffLiebermann AE6KS 831-336-2558
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