Re: [DNA] RE: RS/RA Exchange

[Jim Busse <jimbusse@pacbell.net>]

Hi, Zhigao,

Just to let you know size doesn't matter... :-)
I have a 2200 sq ft home, rather small in this day and age.  I have a
wireless AP upstairs, and one downstairs in the kitchen, and move my
notebook often.

The reason I have 2 is because the 802.11 AP doesn't penetrate walls very
well, and my transfer rate went into the cellar when I moved downstairs.  As
we all already know.

Jim Busse


----- Original Message ----- 
From: "Zhigao Chen" <zgchen@psl.com.sg>
To: "Alper Yegin" <alper.yegin@samsung.com>
Cc: "'Gregory Daley'" <Greg.Daley@eng.monash.edu.au>;
<dna@eng.monash.edu.au>
Sent: Tuesday, March 09, 2004 11:09 PM
Subject: RE: [DNA] RE: RS/RA Exchange


> Hi Alper,
>
> > -----Original Message-----
> > From: Alper Yegin [mailto:alper.yegin@samsung.com]
> > Sent: Wednesday, March 10, 2004 2:52 PM
> > To: 'Zhigao Chen'; 'Gregory Daley'
> > Cc: dna@eng.monash.edu.au
> > Subject: RE: [DNA] RE: RS/RA Exchange
> >
> >
> > Hi Zhigao,
> >
> > > > In single cell-per-access router cases, this is not a big
> > > > issue, though.  The only additional cost is computation on the
> > hosts.
> > > >
> > > My understanding is that single cell per AR is more used in home or
> > small
> > > office networking.
> >
> > I don't think we can make this generalization. It is not uncommon to
> > have single AP in the coffee shops (WISP case), or multiple APs in small
> > offices (I had three in my 40 people office) today. And multiple APs in
> > homes in near future.
> >
> It depends on how big the home or office is. The point I tried to make is
> actually that single AP under an AR is not common. As such, unicast an RA
> has the advantage of less traffic compared to multicast the RA.
>
> > > DNA might not be needed for such scenario, I am afraid.
> >
> > I think you are assuming the hosts are stationary in the office/home.
> > But note that people walk in and out of these locations with laptops,
> > PDAs, IP-enabled phones, etc.
> >
> > Alper
> >
> Yes, what I mean is hosts are less mobile and more concerned with how to
> fast access to the Internet in the case of single AP. As discussed in an
> earlier email, DNA still comes into picture while mobility doesn't.
>
> Regards,
> Zhigao
>