[Discuss-gnuradio] RTS and NAV functions (don't consider strict timing issues)

[Jane Chen]

Hi all,

 

I have two USRPs. I would like to implement some functions (RTS and NAV) in 802.11 MAC. Actually, I want to use RTS to control one of the nodes when to send out packets. When the node recieves the RTS, it should set up its NAV. Hence, the node will not send any packets out during the NAV. I read the codes in the BBN project and still have no idea how to implement the functions that I need.  Could anyone please give me some hints or examples to implement the funcations? 

 

                                        RTS

      Node1                      ---------->                       Node2 (after receives RTS, set up NAV)

 

                                       data

      Node1                      <----------                       Node2 (after NAV, send out data)

 

 

Should I run both bbn_80211b_tx.py and bbn80211b_rx.py on each USRP? For example, I have Node1 and Node2.  Node1 run bbn_80211b_tx.py to send out RTS and  run bbn80211b_rx.py to receive data that sends from Node2. Node2 run bbn_80211b_tx.py to send out data and  run bbn80211b_rx.py to receive RTS that sends from Node1 and then set up NAV.

 

I don't consider the strict timing issues of MAC at this moment. I only want to implement the functions.

 

Thank you,

Jane