WLAN handover between APs

Hi,

i want to know how a handover between WLAN access points works.
I found some articels with google that say that it is possible
with Mobile IP to do a handover that is transparent to the
applications (ip does not change). But this must be implemented
in the client.

Is Mobile IP the only way to provide handover between 2 access
points?

What are other posibilities?

Are they normally implemented in the clients?

I would be very pleased for some answers.

I am also looking for further informations (books, papers, webpages,
RFCs, IEEE specs.). I already searched with google and citeseer.com
but only found information about a handover between WLAN and UMTS/GSM.

Thanks for every hint.

Alex

Hi Alex,

You can find a different solution for restrict region. IAPP(Inter AP
Protocol)
You can find more informations from some AAA companies, for example
Interlink.

Good luck,

Brian Cho

"Alexander Lay" <(E-Mail Removed)> wrote in message
news:bk5h11$pekb1$(E-Mail Removed)...
> Hi,
>
> i want to know how a handover between WLAN access points works.
> I found some articels with google that say that it is possible
> with Mobile IP to do a handover that is transparent to the
> applications (ip does not change). But this must be implemented
> in the client.
>
> Is Mobile IP the only way to provide handover between 2 access
> points?
>
> What are other posibilities?
>
> Are they normally implemented in the clients?
>
> I would be very pleased for some answers.
>
> I am also looking for further informations (books, papers, webpages,
> RFCs, IEEE specs.). I already searched with google and citeseer.com
> but only found information about a handover between WLAN and UMTS/GSM.
>
> Thanks for every hint.
>
> Alex
>

"Alexander Lay" <(E-Mail Removed)> wrote in message
news:bk5h11$pekb1$(E-Mail Removed)...
> Hi,
>
> i want to know how a handover between WLAN access points works.
> I found some articels with google that say that it is possible
> with Mobile IP to do a handover that is transparent to the
> applications (ip does not change). But this must be implemented
> in the client.
>

There are other bits to using mobile IP - a home gateway device
specifically.

You also need to be able to take the traffic inefficiencies, as some of the
packets have to go via the home gateway even if it is not on the direct path
between user and server.

> Is Mobile IP the only way to provide handover between 2 access
> points?

No.
>
> What are other posibilities?

if the APs are connected to the same Layer 2 backbone (ie. plugged into the
same switch cloud), and configured to co-operate, then you should get
wireless handoff without changing IP address - the device stays in the same
subnet.
>
> Are they normally implemented in the clients?
>
> I would be very pleased for some answers.
>
> I am also looking for further informations (books, papers, webpages,
> RFCs, IEEE specs.). I already searched with google and citeseer.com
> but only found information about a handover between WLAN and UMTS/GSM.

Lots of wireless info for building large scale networks in some of the Cisco
white papers. try

www.cisco.com/go/srnd
>
> Thanks for every hint.
>
> Alex
--
Regards

Stephen Hope - remove xx from email to reply