> On Aug 5, 4:39 am, cb <cbellett...@gmail.com> wrote:
>> hello all,
>> I'm trying to use the 802.11b as phy instead of the default 802.11a in
>> an infrastructured wireless network. in order to do that, I just call
>> YansWifiPhyHelper::SetStandard("Standard", StringValue("802.11b")) on
>> the relevant object.

>> unfortunately, nothing appears to work at all. looking at the pcap
>> traces, associations to the AP are very problematic and with lots of
>> retransmissions (though associations are at last successful), and
>> packets are not delivered at all, since nobody answers the ARP
>> requests of the sending node. I found the same behavior in my own code
>> and in the third.cc example as well (once 802.11b is set up).

>> any clues on why this happens? I couldn't find any.

> I don't have the code at hand to check this, but I remember that some
> time ago I faced a similar problem when modifying a simulation program
> to make it run with 802.11b instead of 802.11a. The issue was that the
> SetStandard command did not change the value for the ACK timeout
> (which should be longer in 802.11b), and STA association failed
> because of this. Well, I guess I should have filed a bug report for
> this issue, but at the time the only 802.11b example program in ns3
> was not working, so I ended up filing bug 642 instead (http://
> www.nsnam.org/bugzilla/show_bug.cgi?id=642).
> Since that bug was closed, if you could check whether examples/wifi-
> clear-channel-cmu exhibits the same problem you are experiencing, and
> post a bug report if positive, it would be great.