[MLB-WIRELESS] Orinoco Silver to AP mode

[Simon Butcher]

Hi :)

> OK, looks like (IIUC) AP + bridging ?!?

As the 802.11 standard says: to have an ESS, you have two or more access
points (BSS's) connected via 'portals' to a distribution system ('DS' -
anything which is not 802.11, such as wired ethernet). Through the
distribution system medium ('DSM') runs the distribution system service
('DSS').

The DSS allows an AP's MAC to transport MAC service data units ('MSDU's)
between stations which aren't able to communicate directly over one
single wireless medium ('WM').

Before I get confused by the plethora of acronyms, all it really means
is that you can cover a larger area with multiple AP's using a wired
ethernet connection to link the AP's, all within the same logical
network segment.

All those BSS's then form an ESS through the ESS's DS. Consider station
'A' is on AP #1, and station 'B' is on AP #2. If 'A' sends something to
'B', then AP #1's MAC will pass the MSDU to the DS. The DSM sends it on
appropriately to be broadcast by AP #2, and subsequently to 'B'. Phew
*cough* ;)

So, uhh, yes, I suppose you could say it's just another sort of ethernet
bridging, since ESS inherently provides segmentation of traffic on the
one logical network segment.

It increases mobility because stations can seamlessly move between BSS's
existing within the one ESS, but there's no rule which says BSS coverage
between BSS's needs to overlap to construct the ESS (since packets are
sent between access points through the DS, not the WM).

 - Simon

P.S.
  I hope that made sense :)

 
> On Thu, 9 Jan 2003 02:38 pm, Simon Butcher wrote:
> > > (BTW, what is EBSS?)
> >
> > EBSS? Maybe you mean ESS (Extended Service Set), which is a network 
> > consisting of multiple Infrastructure/BSS networks 
> connected through a 
> > system such as a wired ethernet backbone.
> >
> > IIRC, with ESS, access points can forward packets to other access 
> > points (through the backbone) depending on which access 
> point would be 
> > better to send data to a particular client. ESS increases client 
> > mobility this way (I only know about ESS because there's a IP 
> > telephony based PABX manufacturer developing 802.11 based cordless 
> > VoIP phones for businesses)..
> >
> >  - Simon
> >
> >
> > To unsubscribe: send mail to majordomo at wireless.org.au
> > with "unsubscribe melbwireless" in the body of the message
> 
> -- 
> Dr Paul van den Bergen
> Centre for Advanced Internet Architectures
> caia.swin.edu.au
> pvandenbergen at swin.edu.au
> IM:bulwynkl2002
> would somebody get this big walking carpet out of my way?
> 
> To unsubscribe: send mail to majordomo at wireless.org.au
> with "unsubscribe melbwireless" in the body of the message
> 
> 
> 


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