What will happen if i remove this code and recompile will it work ..from your reply i got that this condition will actually never reached. Please Do reply.
On Fri, Jun 13, 2008 at 11:42 PM, Stefano Busanelli <[EMAIL PROTECTED]> wrote: > Hi, > the parameter aTurnaroundtime of the IEEE 802.15.4 standard (both 2003 > and 2006 versions) fix the maximum transition time between RX and TX > states (and viceversa), > and the ns-2 model uses that value. It is a worst case assumption but > is realistic. > > > http://standards.ieee.org/getieee802/download/802.15.4-2006.pdf > > 2008/6/13 ankur garg <[EMAIL PROTECTED]>: > > > > Hi!, > > > > I am working on the 802.15.4. I am tweaking up things to implement a new > > protocol. Can any body tell me why a transition of radio state TX_ON to > > RX_ON is not done immediately. this has been done using a turn > > _around_state with a delay of turn_around and two times a confirmation > goes: > > > > 1. from this plme_set_trx_state_confirmation with state as p_SUCCESS > > 2. when the TRXhandler is called it confirms the state as TX_ON/RX_ON. > > > > Is this because of RFC of 802.15.4 or just done for simulation or a > > limitation of radio that it takes a turnaorund time for switching. > > > > I am also posting here the code section from file wpan/phy802_15_4.cc > > -------------------------------------------------- > > CODE > > ------------------------------------------------- > > { > > t_status = p_SUCCESS; > > if (((state == p_RX_ON)&&(trx_state == p_TX_ON)) > > ||((state == p_TX_ON)&&(trx_state == p_RX_ON))) > > { > > trx_state_turnaround = state; > > delay = true; > > } > > else > > trx_state = state; > > } > > //we need to delay <aTurnaroundTime> symbols if Tx2Rx or Rx2Tx > > if (delay) > > { > > trx_state = p_TRX_OFF; //should be disabled immediately > > (further transmission/reception will not succeed) > > TRXH.start(aTurnaroundTime/getRate('s')); > > } > > else > > mac->PLME_SET_TRX_STATE_confirm(t_status); > > >
