void
DownlinkPacketScheduler::UpdateAverageTransmissionRate (void)
{
RrcEntity *rrc = GetMacEntity ()->GetDevice ()->GetProtocolStack ()->GetRrcEntity ();
RrcEntity::RadioBearersContainer* bearers = rrc->GetRadioBearerContainer ();
for (std::vector<RadioBearer* >::iterator it = bearers->begin (); it != bearers->end (); it++)
{
RadioBearer *bearer = (*it);
bearer->UpdateAverageTransmissionRate ();
}
}
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
{}
}
}
void
PacketScheduler::CheckForDLDropPackets ()
{
RrcEntity *rrc = GetMacEntity ()->GetDevice ()->GetProtocolStack ()->GetRrcEntity ();
RrcEntity::RadioBearersContainer* bearers = rrc->GetRadioBearerContainer ();
for (std::vector<RadioBearer* >::iterator it = bearers->begin (); it != bearers->end (); it++)
{
//delete packets from queue
(*it)->GetMacQueue ()->CheckForDropPackets (
(*it)->GetQoSParameters ()->GetMaxDelay (), (*it)->GetApplication ()->GetApplicationID ());
//delete fragment waiting in AM RLC entity
if ((*it)->GetRlcEntity()->GetRlcModel() == RlcEntity::AM_RLC_MODE)
{
AmRlcEntity* amRlc = (AmRlcEntity*) (*it)->GetRlcEntity();
amRlc->CheckForDropPackets (
(*it)->GetQoSParameters ()->GetMaxDelay (), (*it)->GetApplication ()->GetApplicationID ());
}
}
}
void
NetworkManager::TransferBearerInfo (UserEquipment* ue, NetworkNode* target)
{
#ifdef HANDOVER_DEBUG
std::cout << "** HO ** \t TransferBearerInfo for user "
<< ue->GetIDNetworkNode () << std::endl;
#endif
if ( (target->GetNodeType() == NetworkNode::TYPE_ENODEB && ue->GetTargetNode ()->GetNodeType() == NetworkNode::TYPE_ENODEB) ||
(target->GetNodeType() == NetworkNode::TYPE_HOME_BASE_STATION && ue->GetTargetNode ()->GetNodeType() == NetworkNode::TYPE_ENODEB) ||
(target->GetNodeType() == NetworkNode::TYPE_ENODEB && ue->GetTargetNode ()->GetNodeType() == NetworkNode::TYPE_HOME_BASE_STATION))
{
ENodeB *oldTargetNode = (ENodeB*) ue->GetTargetNode ();
ENodeB *newTargetNode = (ENodeB*) target;
// 1 - update spectrum, channels and propagation loss model
#ifdef HANDOVER_DEBUG
std::cout << "update spectrum, channels and propagation loss model"<< std::endl;
#endif
ue->GetPhy ()->SetBandwidthManager (newTargetNode->GetPhy ()->GetBandwidthManager ());
LteChannel *oldDl = oldTargetNode->GetPhy ()->GetDlChannel ();
LteChannel *oldUl = oldTargetNode->GetPhy ()->GetUlChannel ();
LteChannel *newDl = newTargetNode->GetPhy ()->GetDlChannel ();
LteChannel *newUl = newTargetNode->GetPhy ()->GetUlChannel ();
ue->GetPhy ()->SetDlChannel (newDl);
if (oldDl->IsAttached (ue))
{
newDl->AddDevice (ue);
oldDl->DelDevice (ue);
}
if (newDl->GetPropagationLossModel () != NULL)
{
newDl->GetPropagationLossModel ()->
AddChannelRealization (CreateChannelRealization (newTargetNode, ue));
oldDl->GetPropagationLossModel ()->DelChannelRealization (oldTargetNode,ue);
}
ue->GetPhy ()->SetUlChannel (newUl);
if (oldUl->IsAttached (ue))
{
newUl->AddDevice (ue);
oldUl->DelDevice (ue);
}
if (newUl->GetPropagationLossModel () != NULL)
{
newUl->GetPropagationLossModel ()->AddChannelRealization (
CreateChannelRealization (ue, newTargetNode));
oldUl->GetPropagationLossModel ()->DelChannelRealization (ue,oldTargetNode);;
}
// 2 - add ue record to the new Enb
#ifdef HANDOVER_DEBUG
std::cout << "add ue record to the new Enb"<< std::endl;
#endif
newTargetNode->RegisterUserEquipment (ue);
// 3 - delete ue record form the old enb
#ifdef HANDOVER_DEBUG
std::cout << "delete ue record form the old enb"<< std::endl;
#endif
oldTargetNode->DeleteUserEquipment (ue);
// 4 - update cell and new target enb for the ue
#ifdef HANDOVER_DEBUG
std::cout << "update cell and new target enb for the ue"<< std::endl;
#endif
ue->SetTargetNode (newTargetNode);
// MOVE RRC CONTEXT FOR THE OLD TARGET NODE TO THE NEWER ONE
#ifdef HANDOVER_DEBUG
std::cout << "MOVE RRC CONTEXT"<< std::endl;
#endif
RrcEntity * oldEnbRrc = oldTargetNode->GetProtocolStack ()->GetRrcEntity ();
RrcEntity * newEnbRrc = newTargetNode->GetProtocolStack ()->GetRrcEntity ();
RrcEntity * ueRrc = ue->GetProtocolStack ()->GetRrcEntity ();
// --> move dl bearers
#ifdef HANDOVER_DEBUG
std::cout << "\t DL radio bearers " << oldEnbRrc->GetRadioBearerContainer ()->size () << std::endl;
#endif
std::vector<RadioBearer* > *dlBearerToDelete = new std::vector<RadioBearer* > ();
for (std::vector<RadioBearer* >::iterator it = oldEnbRrc->GetRadioBearerContainer ()->begin();
it != oldEnbRrc->GetRadioBearerContainer ()->end (); it++)
{
RadioBearer *bearer = (*it);
if (bearer->GetDestination ()->GetIDNetworkNode () == ue->GetIDNetworkNode ())
{
bearer->SetSource (newTargetNode);
bearer->GetRlcEntity ()->SetDevice (newTargetNode);
newEnbRrc->AddRadioBearer (bearer);
dlBearerToDelete->push_back (bearer);
}
}
for (std::vector<RadioBearer* >::iterator it = dlBearerToDelete->begin();
it != dlBearerToDelete->end (); it++)
{
RadioBearer *bearer = (*it);
oldEnbRrc->DelRadioBearer (bearer);
}
dlBearerToDelete->clear ();
delete dlBearerToDelete;
// --> move ul bearers
#ifdef HANDOVER_DEBUG
std::cout << "\t UL radio bearers"<< std::endl;
#endif
std::vector<RadioBearerSink* > *ulBearerToDelete = new std::vector<RadioBearerSink* > ();
for (std::vector<RadioBearerSink* >::iterator it = oldEnbRrc->GetRadioBearerSinkContainer ()->begin();
it != oldEnbRrc->GetRadioBearerSinkContainer ()->end (); it++)
{
RadioBearerSink *bearer = (*it);
if (bearer->GetSource ()->GetIDNetworkNode () == ue->GetIDNetworkNode ())
{
bearer->SetDestination (newTargetNode);
newEnbRrc->AddRadioBearerSink (bearer);
ulBearerToDelete->push_back (bearer);
}
}
for (std::vector<RadioBearerSink* >::iterator it = ulBearerToDelete->begin();
it != ulBearerToDelete->end (); it++)
{
RadioBearerSink *bearer = (*it);
oldEnbRrc->DelRadioBearerSink (bearer);
}
ulBearerToDelete->clear ();
delete ulBearerToDelete;
// UPDATE THE RRC CONTEXT FOR THE UE
#ifdef HANDOVER_DEBUG
std::cout << "\t UE updates DL radio bearers "<< std::endl;
#endif
for (std::vector<RadioBearerSink* >::iterator it = ueRrc->GetRadioBearerSinkContainer ()->begin();
it != ueRrc->GetRadioBearerSinkContainer ()->end (); it++)
{
RadioBearerSink *bearer = (*it);
bearer->SetSource (newTargetNode);
}
#ifdef HANDOVER_DEBUG
std::cout << "\t UE updates UL radio bearers "<< std::endl;
#endif
for (std::vector<RadioBearer* >::iterator it = ueRrc->GetRadioBearerContainer ()->begin();
it != ueRrc->GetRadioBearerContainer ()->end (); it++)
{
RadioBearer *bearer = (*it);
bearer->SetDestination (newTargetNode);
}
}
}
