Return to the archive index

Re: lucent wavelan 11mbps silver 802.11 pcmcia under linux

 From: Bryan Andersen <>
>hurley bryan wrote:
>> can these work both ways: talk just to each other, say 4-XX number of
>> computers talking to each other with no base station: what is the limit?
>
>2 - peer to peer without a base station.  The base station is needed 
>to coordinate time slots for any more.

with a peer-to-peer, you can have as many as you want, the trick is
that there are no repeaters, so if you can't see any machines directly,
you can't see them at all.  There's nobody around to help you out.

For example, I have three webgear aviator 2.4 cards in proximity to
each other:  10.1.1.1, 10.1.1.2, and 10.1.1.3

.1 can send packets directly to .2, and .2 to .3, and .3 to .1, but if
.1 is way out in left field, and can only see .2 (only .2 is in radio
range), .2 won't pass the packets on to .3, which a base station would
in "structured" mode.

>Others make base stations that are web or telnet configureable.

or if you have various "server" machines lying around, you can drop the
card in, do peer-to-peer, and masquerade the rf network to the ethernet
network.  I've got two, going on three of these "rf gateways".  one at
home, one at work, and one to be portable; so I can carry it to other
buildings, and still have connectivity.

>> and are they compatible with the Aviator WebGear 2.4 in one of these
>> modes?
>
>Depends...  Are they both IEEE 802.11 DSSS @ 2.4GHz?  There is one 
>gaping hole in the standard, and that is over the lowest hardware 
>layer.  Atleast most manufacturers are going with DSSS in the 2.4GHz 
>ISM band.

I wouldn't call it a gaping hole; more like a "technical decision".
dsss is inherently higher bandwidth, but is more prone to interference.
fhss is inherently lower bandwidth, but is less prone to interference.

the latter also means you can have more nodes in the same area, without
interfereing with each other.  If you have a 2.4GHz fhss phone, it's
going to really mess with your 2.4GHz dsss wireless lan.

   - Kevin

--
Subcription/unsubscription/info requests: send e-mail with subject of
"subscribe", "unsubscribe", or "info" to 
Wear-Hard Mailing List Archive (searchable): http://wearables.blu.org

From Wear-Hard Mailing list Archive (WH)
Maintained by R. Paul McCarty

Archive created with babymail