Message queue problem in bbn_80211b_tx.py

Hi, all,

I am trying to communicate between two USRP1 with the bbn_80211b_tx.py
and
bbn_80211b_rx.py. My OS is Ubuntu 10.10, but I have no idea what is my
GNU Radio
release(if anyone can help me to find out it, it will be very
appreciated.)

First, I tried to transmit the getty.txt. I run the command line as
following:

bbn_80211b_tx.py

and got the output as following:

Using TX d’board A: Flex 2400 Tx MIMO B

gr_fir_ccf: using SSE
spb: 8
interp: 32
Sending pkt 0
sending…
Sending pkt 1
sending…
Sending pkt 2
sending…

then it was just stuck there, no response at all, even I make ctrl+c. I
had to
kill the process to terminated it.

By reading the code, I guessed the problem is related with the message
queue,
and I modified the message limit from 2 to 5, then it was stuck on
‘Sending pkt
5’.

So, I guessed the problem is, the packets in the message queue were not
sent out
at all, so when the message queue reached its limit, it just stopped. I
have
tried to look around for any possible resolution but didn’t get any.

Has anyone encountered the same problem before? Any suggestions will be
very
helpful!

Thank you in advance!

Xiang