hi everyone,
excuse me
i am reading the code of TOSSIM
this is the code in CpmModelC.nc in
tinyos-2.1.1/tos/lib/tossim/CpmModelC.nc
00177 void sim_gain_ack_handle(sim_event_t* evt) {
00178 // Four conditions must hold for an ack to be issued:
00179 // 1) Transmitter is still sending a packet (i.e., not cancelled)
00180 // 2) The packet requested an acknowledgment
00181 // 3) The transmitter is on
00182 // 4) The packet passes the SNR/ARR curve
i do not understand why hold a act when 2) The packet requested an
acknowledgment 4) The packet passes the SNR/ARR curve?
napoleon
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