[ns] TwoRayGround propagation loss path

[Jose Aguiar Silva]

Hello all,
  I have a doubt related to TwoRayGround propagation loss path in
ns2. Could you help me?
  I suppose the packets are lost as the distance increases, for
example, with the radio range of 100 m,  when the distance between two
nodes are 90 m, 30% of the packets are dropped. Is it a expected
behavior? Is there some way to do that? I mean, the drop criterion
based on distance?
 How can I do this be behavior?

Thanks in advance.
Rodrigo

[ns] how to use MCPS_DATA_request?

[Jose Aguiar Silva]

hello all,
   I am trying to broadcast a 802.15.4 MAC packet in p802_15_4mac.cc file.
My code is:


  packet = Packet::alloc();
  FrameCtrl frmCtrl;

   UINT_8 txop = 0;
   hdr_cmn *ch = HDR_CMN(packet);
   ch-direction() == hdr_cmn::DOWN;

   MCPS_DATA_request(index_,0,
index_,defFrmCtrl_AddrMode16,0,p802_15_4macDA(packet),ch-size(),packet,0,txop);


  index_ is the srcAddress, inherited from MAC class.


  The problem is :
[wpan/p802_15_4mac.cc::checkTaskOverflow][1.223884](node 76) task overflow:
MCPS-DATA.request


 How can I send a mac message? I am in peer-to-peer 802.15.4 mode.
Thanks in advance.

[ns] Can anybody use MCPS_DATA_request successfully?

[Jose Aguiar Silva]

Hello all,
Have anybody ever successfully used this primitive?!
It's a couple of weeks that I'm trying to transfer my own data packet using
that but not a packet leaves my nodes!
Please help me

[ns] Timer on Mac class

[Jose Aguiar Silva]

Hi all,
  I am trying to implement in ns2 a period timer in Mac class level.
However, it is generating a infinite loop.
  Please, see my implementation:

//.h
class MyTimer : public Mac802_15_4Timer {
public:
  MyTimer(MacClass *a) : Mac802_15_4Timer() {a_=a;}
  virtual voidhandle(Event *e);
protected:
  MacClass *a_;
};

//.cc
void MyTimer::handle(Event *e)
{
   a_-Test();
}

void MacClass::Test()
{o
   myTimer-start(0.5); // periodic timer 0.5 seconds
}

How can I use the stop method of Timer function to implement periodic event
in MAC layer? I did the same procedure on Routing layer and it is possible!
What is wrong?
Thanks in advance.
Jose Aguiar