Ns3 - How to send WSMP packets in VANET periodically, through the CCH channel (wave-simple-device.cc edit)?

问题

I'm newbie with ns3. i wanted to simulate a vanet network with two nodes, in which a node send periodically (each 0.1 second) wsmp packet on the CCH channel. i used the code : wave-simple-device.cc and i did some modification in the following function:

'''

void
WaveNetDeviceExample::SendOneWsmpPacket  (uint32_t channel, uint32_t seq)
{
 Ptr<WaveNetDevice>  sender = DynamicCast<WaveNetDevice> (devices.Get (0));
 Ptr<WaveNetDevice>  receiver = DynamicCast<WaveNetDevice> (devices.Get (1));
 const static uint16_t WSMP_PROT_NUMBER = 0x88DC;
 Mac48Address bssWildcard = Mac48Address::GetBroadcast ();

 const TxInfo txInfo = TxInfo (channel);
 Ptr<Packet> p  = Create<Packet> (100);
 SeqTsHeader seqTs;
 seqTs.SetSeq (seq);
  p->AddHeader (seqTs);
  sender->SendX  (p, bssWildcard, WSMP_PROT_NUMBER, txInfo);
 }

void
WaveNetDeviceExample::SendWsmpExample ()
{
  CreateWaveNodes ();
  Ptr<WaveNetDevice>  sender = DynamicCast<WaveNetDevice> (devices.Get (0));
  Ptr<WaveNetDevice>  receiver = DynamicCast<WaveNetDevice> (devices.Get (1));

  // Alternating access without immediate channel switch
  const SchInfo schInfo = SchInfo (SCH1, false, EXTENDED_ALTERNATING);
  Simulator::Schedule (Seconds (0.0), 
&WaveNetDevice::StartSch,sender,schInfo);
      // An important point is that the receiver should also be assigned channel
  // access for the same channel to receive packets.
      Simulator::Schedule (Seconds (0.0), &WaveNetDevice::StartSch, receiver, schInfo);

  // send WSMP packets
  // the first packet will be queued currently and be transmitted in next SCH interval
  Simulator::Schedule (Seconds (1.0), &WaveNetDeviceExample::SendOneWsmpPacket,  this, SCH1, 1);
  // the second packet will be queued currently and then be transmitted , because of in the CCH interval.
  Simulator::Schedule (Seconds (1.0), &WaveNetDeviceExample::SendOneWsmpPacket,  this, CCH, 2);
  // the third packet will be dropped because of no channel access for SCH2.
  Simulator::Schedule (Seconds (1.0), &WaveNetDeviceExample::SendOneWsmpPacket,  this, SCH2, 3);

  // release SCH access
  Simulator::Schedule (Seconds (2.0), &WaveNetDevice::StopSch, sender, SCH1);
  Simulator::Schedule (Seconds (2.0), &WaveNetDevice::StopSch, receiver, SCH1);
   // the fourth packet will be queued and be transmitted because of default CCH access assigned automatically.
  Simulator::Schedule (Seconds (3.0), &WaveNetDeviceExample::SendOneWsmpPacket,  this, CCH, 4);
  // the fifth packet will be dropped because of no SCH1 access assigned
  Simulator::Schedule (Seconds (3.0), &WaveNetDeviceExample::SendOneWsmpPacket,  this, SCH1, 5);

  Simulator::Stop (Seconds (5.0));
  Simulator::Run ();
  Simulator::Destroy ();
}

'''

to send the wsmp packet periodically, i tried to use a loop in here:

for(...){
sender->SendX  (p, bssWildcard, WSMP_PROT_NUMBER, txInfo);
sleep(0.1s);
}

However, to many errors appear.

Second, to send this wsmp packet on the CCH channel instead of SSh .. i didn't found any clear tutoriel ? any help please ? Thanks in advance

来源：https://stackoverflow.com/questions/58792744/ns3-how-to-send-wsmp-packets-in-vanet-periodically-through-the-cch-channel-w

标签

c++

networking

simulation

ns-3