[ns] wpan 802.15.4

[Φανή]

Hello ns users,
I am implementing a star topology in 802.15.4 with 20 nodes where node 0 is the PAN coordinator. I want node 0 to act as a sink only and receive packets without sending any to the other nodes. Even though I am using wpan_demo2.tcl form J.Zheng where I assumed that node 0 acts as a sink (as it is indicated in the documentation), form the trace file I get results like the following meaning that node 0 is still sending packets.
 
s 926.403796767 _0_ MAC --- 4554 exp 27 [0 5 0 800] ------- [0:2 5:0 30 5] 
s 926.405044789 _5_ MAC --- 4554 ACK 5 [0 0 5 0] 
r 926.405396810 _0_ MAC --- 4554 ACK 5 [0 0 5 0] 
r 926.406036789 _5_ MAC --- 4554 exp 20 [0 5 0 800] ------- [0:2 5:0 30 5] 
 
Meaning that node 0 sends an exponential packet (as I have poisson traffic) to node 5 which after aknowledgments receives the packet.
Does anyone know how and what I should modify to make node 0 to receive only?
Please it is urgent.
Thank you in advance!
Fani


      
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