[Tinyos-help] Application loses packets when using Low Power Listening on TOSSIM

[Vinai Sundaram]

Hi ,

I notice that when I put the CC1000Radio (in tos/platform/pc ) in low 
power listening(LPL) mode, the application loses packets although lossy 
radio model is not used. The event sendDone gets called on the sender 
side but the receiver does not receive the packet. When I put debug 
statements to observe radio operations, I found that receiver mote does 
not get a chance to run until the sendDone is called on the sender mote. 
I set both the listening mode and transmit mode to the same value as 
explained in the CC1000Radio Manual ( 
http://www.tinyos.net/tinyos-1.x/doc/mica2radio/CC1000.html ).  The same 
behavior happens irrespective of the mode except "always on" mode. When 
I use the radio on always on mode, no packets are lost and everything 
works fine. Why does LPL makes packets to be lost?  Also, how to enable 
ack on CC1000Radio ( tos/platform/pc )?  Any pointers are appreciated.

Thanks,
Vinai.