Problem with tx path in bbn code

Hi guys,

 Is there anyone using bbn 802.11 codes?

 I find the tx path cannot output anything to the usrp board. I 

connect
the packet_transmitter to a file sink by adding two lines in
bbn_80211b_transmit_path.py
"
self.fsink=gr.file_sink(gr.sizeof_gr_complex, “Tx.dat”)
fg.connect(self.packet_transmitter, self.fsink)
"

  The file records nothing! What's the problem with the bbn 80211

transmitter? Is there anything wrong with the message queue used in the
bbn_802b_pkt.py?

  Can I find some other code that can be played with in 802.11 

network?
Thanks!

   Best

   -Di


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DiX [email protected] writes:

  The file records nothing! What's the problem with the bbn 80211

transmitter? Is there anything wrong with the message queue used in the
bbn_802b_pkt.py?

We used the receiver much more. Beware that the default flags don’t use
the barker code (because it’s so cpu intensive), and that you’ll have to
turn that on if you want to try to interoperate.

How are you injecting packets into the transmitter? We had this set up
to use a pseudointerface to get packets to/from the kernel from the
802.11 code. If you don’t send it packets it won’t send anything.

Thanks for your reply!

Greg T. wrote:

DiX [email protected] writes:

We used the receiver much more. Beware that the default flags don’t use
the barker code (because it’s so cpu intensive), and that you’ll have to
turn that on if you want to try to interoperate.

– Yes, the rx path works like a charm!

How are you injecting packets into the transmitter? We had this set up
to use a pseudointerface to get packets to/from the kernel from the
802.11 code. If you don’t send it packets it won’t send anything.

– I use bbn_80211b_transmit_path.send_pkt(payload, eof) to send packet.
Should that work? Is it possible to send from a packet from USRP with
bbn
code and receive the packet on a standard wireless card in my laptop? By
receiving, I mean detecting with the help of ethereal.

Best,

-Di

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