void DownlinkPacketScheduler::SelectFlowsToSchedule ()
{
#ifdef SCHEDULER_DEBUG
	std::cout << "\t Select Flows to schedule" << std::endl;
#endif

  ClearFlowsToSchedule ();

  RrcEntity *rrc = GetMacEntity ()->GetDevice ()->GetProtocolStack ()->GetRrcEntity ();
  RrcEntity::RadioBearersContainer* bearers = rrc->GetRadioBearerContainer ();


  for (std::vector<RadioBearer* >::iterator it = bearers->begin (); it != bearers->end (); it++)
	{
	  //SELECT FLOWS TO SCHEDULE
	  RadioBearer *bearer = (*it);
	  if (bearer->HasPackets () && bearer->GetDestination ()->GetNodeState () == NetworkNode::STATE_ACTIVE)
		{
		  //compute data to transmit
		  int dataToTransmit;
		  if (bearer->GetApplication ()->GetApplicationType () == Application::APPLICATION_TYPE_INFINITE_BUFFER)
			{
			  dataToTransmit = 100000000;
			}
		  else
			{
			  dataToTransmit = bearer->GetQueueSize ();
			}

		  //compute spectral efficiency
		  ENodeB *enb = (ENodeB*) GetMacEntity ()->GetDevice ();
		  ENodeB::UserEquipmentRecord *ueRecord = enb->GetUserEquipmentRecord (bearer->GetDestination ()->GetIDNetworkNode ());
		  std::vector<double> spectralEfficiency;
		  std::vector<int> cqiFeedbacks = ueRecord->GetCQI ();
		  int numberOfCqi = cqiFeedbacks.size ();
		  for (int i = 0; i < numberOfCqi; i++)
			{
			  double sEff = GetMacEntity ()->GetAmcModule ()->GetEfficiencyFromCQI (cqiFeedbacks.at (i));
			  spectralEfficiency.push_back (sEff);
			}

		  //create flow to scheduler record
		  InsertFlowToSchedule(bearer, dataToTransmit, spectralEfficiency, cqiFeedbacks);
		}
	  else
	    {}
	}
}
Example #2
0
PacketBurst*
AmRlcEntity::TransmissionProcedure (int availableBytes)
{
#ifdef RLC_DEBUG
  std::cout << "AM RLC tx procedure for node " << GetRadioBearerInstance ()->GetSource ()->GetIDNetworkNode ()<< " bearer "<<  GetRlcEntityIndex () << std::endl;
#endif

  PacketBurst* pb = new PacketBurst ();
  AmStateVariables* amRlcState = GetAmStateVariables ();

  //STEP 1 CHECK FOR RE-TRANSMISSION
#ifdef RLC_DEBUG
  std::cout << "--> STEP 1:  CHECK FOR RE-TRANSMISSION" << std::endl;
  PrintSentAMDs ();
#endif

  int nbSentAMDs = GetSentAMDs()->size();
  if (nbSentAMDs != 0)
    {
      int amdId = 0;
	  while (availableBytes > 0 && amdId < nbSentAMDs)
        {
    	  AmdRecord* amdRecord = GetSentAMDs()->at (amdId);

    	  if (amdRecord->m_packet->GetSize () + 6 <= availableBytes) //6 = MAC  + CRC overhead
    	    {
    	      amdRecord->m_retx_count++;
#ifdef RLC_DEBUG
    		  std::cout << "send the whole unacknowledged AMD PDU" << std::endl;
#endif
    		  Packet* p = amdRecord->m_packet->Copy ();
    		  MACHeader *mac = new MACHeader (GetRadioBearerInstance ()->GetSource ()->GetIDNetworkNode (),
    	    		                          GetRadioBearerInstance ()->GetDestination ()->GetIDNetworkNode ());
    	      p->AddMACHeader(mac);
    	      p->AddHeaderSize (3);

    	      if (_RLC_TRACING_)
    	        {
	              std::cout << "TX AM_RLC SIZE" << p->GetSize () <<
	        		    " B " << GetRlcEntityIndex () <<
	        		    " PDU_SN " << p->GetRLCHeader ()->GetRlcPduSequenceNumber() << std::endl;
    	        }

    	      pb->AddPacket (p);
    	      availableBytes -= p->GetSize ();
    	      amdId++;
    	    }
    	  else if (availableBytes > 8) // 8 = RLC + MAC + CRC
    	    {

    	      amdRecord->m_retx_count++;
#ifdef RLC_DEBUG
    		  std::cout << "there is not enough bandwidth for this AMD PDU. Do another fragmentation"
    				  << "--> bytes: " << availableBytes << std::endl;
#endif
    		  Packet* p1 = amdRecord->m_packet->Copy ();
    		  Packet* p2 = amdRecord->m_packet;

    		  int sentBytes = availableBytes - 7;
    		  p1->GetRLCHeader ()->SetEndByte (p1->GetRLCHeader ()->GetStartByte () + sentBytes - 1);
              p1->SetSize (2 + sentBytes); //consider both RLC and sent bytes
    		  p2->GetRLCHeader ()->SetStartByte (p1->GetRLCHeader ()->GetStartByte () + sentBytes);
    		  p2->SetSize (p2->GetSize () - sentBytes); //decrease the packet size by the quota of sent bytes
    		  p1->GetRLCHeader ()->SetTheLatestFragment (false);

    		  p1->GetRLCHeader ()->SetAFragment (true);
    		  p2->GetRLCHeader ()->SetAFragment (true);

       		  MACHeader *mac = new MACHeader (GetRadioBearerInstance ()->GetSource ()->GetIDNetworkNode (),
      	    		                          GetRadioBearerInstance ()->GetDestination ()->GetIDNetworkNode ());
       	      p1->AddMACHeader(mac);
       	      p1->AddHeaderSize (3); //CRC

       	      if (_RLC_TRACING_)
       	        {
                  std::cout << "TX AM_RLC SIZE" << p1->GetSize () <<
       	    		 " B " << GetRlcEntityIndex () <<
       	    		 " PDU_SN " << p1->GetRLCHeader ()->GetRlcPduSequenceNumber() << std::endl;
       	        }

       	      pb->AddPacket (p1->Copy ());

    		  AmdRecord* newAmdRecord = new AmdRecord (p1, p1->GetRLCHeader ()->GetRlcPduSequenceNumber ());
    		  newAmdRecord->m_retx_count = amdRecord->m_retx_count;
    		  GetSentAMDs ()->insert(GetSentAMDs ()->begin() + amdId, newAmdRecord);

#ifdef RLC_DEBUG
       	      PrintSentAMDs ();
#endif
       	      availableBytes = 0;
    	    }
    	  else
    	    {
    		  availableBytes = 0;
    	    }

        }
    }



  if (availableBytes <= 0 ) return pb;


  //STEP 2 NEW TRANSMISSION
#ifdef RLC_DEBUG
  std::cout << "--> STEP 2:  CHECK FOR NEW TRANSMISSION" << std::endl;
#endif

  RadioBearer *bearer = (RadioBearer*) GetRadioBearerInstance ();
  MacQueue *queue = bearer->GetMacQueue ();

  if (bearer->GetApplication ()->GetApplicationType () == Application::APPLICATION_TYPE_INFINITE_BUFFER)
    {
	  //CREATE PACKET FOR THE INFINITE BUFFER SOURCE
	  while (true)
	    {
	      Packet *packet = bearer->CreatePacket (availableBytes);
	      packet->GetRLCHeader ()->SetRlcEntityIndex (GetRlcEntityIndex ());

          // set sn
	      int currentSN = amRlcState->m_vt_s;
	      packet->GetRLCHeader ()->SetRlcPduSequenceNumber (currentSN);

	      //update am rlc state variables
	      amRlcState->m_vt_s++;

	      //Add MAC header
	      MACHeader *mac = new MACHeader (GetRadioBearerInstance ()->GetSource ()->GetIDNetworkNode (),
	    		                          GetRadioBearerInstance ()->GetDestination ()->GetIDNetworkNode ());
	      packet->AddMACHeader(mac);
          packet->AddHeaderSize (3);

	      if (availableBytes > 1503)
	        {
	    	  packet->SetSize (1503);
	    	  packet->GetPacketTags ()->SetApplicationSize (1490);
	    	  availableBytes -= 1503;

	    	  if (_RLC_TRACING_)
	    	    {
	              std::cout << "TX AM_RLC SIZE " << packet->GetSize () <<
	        		  " B " << GetRlcEntityIndex () <<
	        		  " PDU_SN " << packet->GetRLCHeader ()->GetRlcPduSequenceNumber() <<
	        		  " Frag " << packet->GetRLCHeader ()->IsAFragment () <<
	        		  " LastFrag " << packet->GetRLCHeader ()->IsTheLatestFragment() <<
	        		  " startB " << packet->GetRLCHeader ()->GetStartByte () <<
	        		  " endB " << packet->GetRLCHeader ()->GetEndByte () <<
	        		  std::endl;
	    	    }

	          pb->AddPacket (packet);
	        }
	      else if (availableBytes > 13)
	        {
	    	  packet->SetSize (availableBytes);
	    	  packet->GetPacketTags ()->SetApplicationSize (availableBytes - 13);
	    	  availableBytes = 0;

	    	  if (_RLC_TRACING_)
	    	    {
	              std::cout << "TX 2 AM_RLC SIZE " << packet->GetSize () <<
	        		  " B " << GetRlcEntityIndex () <<
	        		  " PDU_SN " << packet->GetRLCHeader ()->GetRlcPduSequenceNumber() <<
	        		  " Frag " << packet->GetRLCHeader ()->IsAFragment () <<
	        		  " LastFrag " << packet->GetRLCHeader ()->IsTheLatestFragment() <<
					  " startB " << packet->GetRLCHeader ()->GetStartByte () <<
					  " endB " << packet->GetRLCHeader ()->GetEndByte () <<
					  std::endl;
	    	    }

	    	  pb->AddPacket (packet);
	    	  break;
	        }
	      else
	        {
	    	  availableBytes = 0;
	    	  break;
	        }
	    }
    }
  else
    {
      while (availableBytes > 0 && !queue->IsEmpty ())
        {
	      Packet* packet = queue->GetPacketToTramsit (availableBytes);

	      if (packet != NULL)
	        {

#ifdef RLC_DEBUG
	    	  std::cout << "SEND PACKET id " << packet->GetID() << " frag n " << packet->GetRLCHeader ()->GetFragmentNumber ()<< std::endl;
#endif

	    	  //Set the id of the receiver RLC entity
		      packet->GetRLCHeader ()->SetRlcEntityIndex (GetRlcEntityIndex ());

		      //amRlcState->PrintTxVariables ();

	          // set sn
		      int currentSN = amRlcState->m_vt_s;
		      packet->GetRLCHeader ()->SetRlcPduSequenceNumber (currentSN);

		      //update am rlc state variables
		      amRlcState->m_vt_s++;

		      //amRlcState->PrintTxVariables ();

#ifdef RLC_DEBUG
	    	  std::cout << "_____ pkt " << packet->GetID() << " frag " << packet->GetRLCHeader ()->GetFragmentNumber () <<
	    			  " sn " << packet->GetRLCHeader ()->GetRlcPduSequenceNumber () <<
	    			  " startB " << packet->GetRLCHeader ()->GetStartByte () <<
	    			  " endB " << packet->GetRLCHeader ()->GetEndByte () << std::endl;
	    	  PrintSentAMDs ();
#endif


	    	  AmdRecord *amdRecord = new AmdRecord (packet->Copy (), currentSN);
		      GetSentAMDs ()->push_back (amdRecord);
#ifdef RLC_DEBUG
		      PrintSentAMDs ();
#endif
		      //Add MAC header
		      MACHeader *mac = new MACHeader (GetRadioBearerInstance ()->GetSource ()->GetIDNetworkNode (),
		    		                          GetRadioBearerInstance ()->GetDestination ()->GetIDNetworkNode ());
		      packet->AddMACHeader(mac);
              packet->AddHeaderSize (3);

              if (_RLC_TRACING_)
                {
	              std::cout << "TX AM_RLC SIZE " << packet->GetSize () <<
	        		  " B " << GetRlcEntityIndex () <<
	        		  " PDU_SN " << packet->GetRLCHeader ()->GetRlcPduSequenceNumber() << std::endl;
                }

	    	  pb->AddPacket (packet);
	    	  availableBytes -= packet->GetSize ();
	        }
	      else
	        {
	    	  availableBytes = 0;
	        }
        }
    }
  return pb;
}
Example #3
0
PacketBurst*
UmRlcEntity::TransmissionProcedure (int availableBytes)
{
#ifdef RLC_DEBUG
  std::cout << "UM RLC tx procedure for node " << GetRadioBearerInstance ()->GetSource ()->GetIDNetworkNode ()<< std::endl;
#endif

  PacketBurst* pb = new PacketBurst ();

  RadioBearer *bearer = (RadioBearer*) GetRadioBearerInstance ();
  MacQueue *queue = bearer->GetMacQueue ();

  if (bearer->GetApplication ()->GetApplicationType () == Application::APPLICATION_TYPE_INFINITE_BUFFER)
    {
	  //CREATE PACKET FOR THE INFINITE BUFFER SOURCE
	  while (true)
	    {
	      Packet *packet = bearer->CreatePacket (availableBytes);

	      //Set the id of the receiver RLC entity
	      packet->GetRLCHeader ()->SetRlcEntityIndex (GetRlcEntityIndex ());

	      packet->GetRLCHeader ()->SetRlcPduSequenceNumber (GetRlcPduSequenceNumber ());
	      int newSequenceNumber = GetRlcPduSequenceNumber () + 1;
	      SetRlcPduSequenceNumber (newSequenceNumber);

	      //Add MAC header
	      MACHeader *mac = new MACHeader (GetRadioBearerInstance ()->GetSource ()->GetIDNetworkNode (),
	    		                          GetRadioBearerInstance ()->GetDestination ()->GetIDNetworkNode ());
	      packet->AddMACHeader(mac);
          packet->AddHeaderSize (3); //CRC

	      if (availableBytes > 1503)
	        {
	    	  packet->SetSize (1503);
	    	  packet->GetPacketTags ()->SetApplicationSize (1490);
	    	  //Set the id of the receiver RLC entity
		      packet->GetRLCHeader ()->SetRlcEntityIndex (GetRlcEntityIndex ());
		      packet->GetRLCHeader ()->SetRlcPduSequenceNumber (GetRlcPduSequenceNumber ());
		      int newSequenceNumber = GetRlcPduSequenceNumber () + 1;
		      SetRlcPduSequenceNumber (newSequenceNumber);

	    	  availableBytes -= 1503;
	          pb->AddPacket (packet);

	          if (_RLC_TRACING_)
	            {
	              std::cout << "TX UM_RLC SIZE" << packet->GetSize () <<
	        		  " B " << GetRlcEntityIndex () <<
	        		  " PDU_SN " << packet->GetRLCHeader ()->GetRlcPduSequenceNumber() << std::endl;
	            }
	        }
	      else if (availableBytes > 13)
	        {
	    	  packet->SetSize (availableBytes);
	    	  packet->GetPacketTags ()->SetApplicationSize (availableBytes - 13);
	    	  //Set the id of the receiver RLC entity
		      packet->GetRLCHeader ()->SetRlcEntityIndex (GetRlcEntityIndex ());
		      packet->GetRLCHeader ()->SetRlcPduSequenceNumber (GetRlcPduSequenceNumber ());
		      int newSequenceNumber = GetRlcPduSequenceNumber () + 1;
		      SetRlcPduSequenceNumber (newSequenceNumber);

	    	  availableBytes = 0;
	    	  pb->AddPacket (packet);

	          if (_RLC_TRACING_)
	            {
	              std::cout << "TX UM_RLC SIZE" << packet->GetSize () <<
	        		  " B " << GetRlcEntityIndex () <<
	        		  " PDU_SN " << packet->GetRLCHeader ()->GetRlcPduSequenceNumber() << std::endl;
	            }

	    	  break;
	        }
	      else
	        {
	    	  availableBytes = 0;
	    	  break;
	        }
	    }
    }
  else
    {
      while (availableBytes > 0 && !queue->IsEmpty ())
        {
	      Packet* packet = queue->GetPacketToTramsit (availableBytes);

	      if (packet != NULL)
	        {
	    	  //Set the id of the receiver RLC entity
		      packet->GetRLCHeader ()->SetRlcEntityIndex (GetRlcEntityIndex ());
		      packet->GetRLCHeader ()->SetRlcPduSequenceNumber (GetRlcPduSequenceNumber ());
		      int newSequenceNumber = GetRlcPduSequenceNumber () + 1;
		      SetRlcPduSequenceNumber (newSequenceNumber);

	          if (_RLC_TRACING_)
	            {
	              std::cout << "TX UM_RLC SIZE" << packet->GetSize () <<
	        		  " B " << GetRlcEntityIndex () <<
	        		  " PDU_SN " << packet->GetRLCHeader ()->GetRlcPduSequenceNumber() << std::endl;
	            }

		      //Add MAC header
		      MACHeader *mac = new MACHeader (GetRadioBearerInstance ()->GetSource ()->GetIDNetworkNode (),
		    		                          GetRadioBearerInstance ()->GetDestination ()->GetIDNetworkNode ());
		      packet->AddMACHeader(mac);
              packet->AddHeaderSize (3); //CRC

	    	  pb->AddPacket (packet);
	    	  availableBytes -= packet->GetSize ();
	        }
	      else
	        {
	    	  availableBytes = 0;
	        }
        }
    }

  return pb;
}