Bug-fix in UpdateDlRlcBufferInfo of RR and PF schedulers: the 2 bytes of RLC overhead affects only new tx queue and not status and retx ones
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Marco Miozzo <marco.miozzo@cttc.es>
*/
#ifdef __FreeBSD__
#define log2(x) (log (x) / M_LN2)
#endif /* __FreeBSD__ */
#include <ns3/log.h>
#include <ns3/pointer.h>
#include <set>
#include <ns3/lte-amc.h>
#include <ns3/rr-ff-mac-scheduler.h>
#include <ns3/simulator.h>
#include <ns3/lte-common.h>
#include <ns3/lte-vendor-specific-parameters.h>
#include <ns3/boolean.h>
NS_LOG_COMPONENT_DEFINE ("RrFfMacScheduler");
namespace ns3 {
int Type0AllocationRbg[4] = {
10, // RGB size 1
26, // RGB size 2
63, // RGB size 3
110 // RGB size 4
}; // see table 7.1.6.1-1 of 36.213
NS_OBJECT_ENSURE_REGISTERED (RrFfMacScheduler);
class RrSchedulerMemberCschedSapProvider : public FfMacCschedSapProvider
{
public:
RrSchedulerMemberCschedSapProvider (RrFfMacScheduler* scheduler);
// inherited from FfMacCschedSapProvider
virtual void CschedCellConfigReq (const struct CschedCellConfigReqParameters& params);
virtual void CschedUeConfigReq (const struct CschedUeConfigReqParameters& params);
virtual void CschedLcConfigReq (const struct CschedLcConfigReqParameters& params);
virtual void CschedLcReleaseReq (const struct CschedLcReleaseReqParameters& params);
virtual void CschedUeReleaseReq (const struct CschedUeReleaseReqParameters& params);
private:
RrSchedulerMemberCschedSapProvider ();
RrFfMacScheduler* m_scheduler;
};
RrSchedulerMemberCschedSapProvider::RrSchedulerMemberCschedSapProvider ()
{
}
RrSchedulerMemberCschedSapProvider::RrSchedulerMemberCschedSapProvider (RrFfMacScheduler* scheduler) : m_scheduler (scheduler)
{
}
void
RrSchedulerMemberCschedSapProvider::CschedCellConfigReq (const struct CschedCellConfigReqParameters& params)
{
m_scheduler->DoCschedCellConfigReq (params);
}
void
RrSchedulerMemberCschedSapProvider::CschedUeConfigReq (const struct CschedUeConfigReqParameters& params)
{
m_scheduler->DoCschedUeConfigReq (params);
}
void
RrSchedulerMemberCschedSapProvider::CschedLcConfigReq (const struct CschedLcConfigReqParameters& params)
{
m_scheduler->DoCschedLcConfigReq (params);
}
void
RrSchedulerMemberCschedSapProvider::CschedLcReleaseReq (const struct CschedLcReleaseReqParameters& params)
{
m_scheduler->DoCschedLcReleaseReq (params);
}
void
RrSchedulerMemberCschedSapProvider::CschedUeReleaseReq (const struct CschedUeReleaseReqParameters& params)
{
m_scheduler->DoCschedUeReleaseReq (params);
}
class RrSchedulerMemberSchedSapProvider : public FfMacSchedSapProvider
{
public:
RrSchedulerMemberSchedSapProvider (RrFfMacScheduler* scheduler);
// inherited from FfMacSchedSapProvider
virtual void SchedDlRlcBufferReq (const struct SchedDlRlcBufferReqParameters& params);
virtual void SchedDlPagingBufferReq (const struct SchedDlPagingBufferReqParameters& params);
virtual void SchedDlMacBufferReq (const struct SchedDlMacBufferReqParameters& params);
virtual void SchedDlTriggerReq (const struct SchedDlTriggerReqParameters& params);
virtual void SchedDlRachInfoReq (const struct SchedDlRachInfoReqParameters& params);
virtual void SchedDlCqiInfoReq (const struct SchedDlCqiInfoReqParameters& params);
virtual void SchedUlTriggerReq (const struct SchedUlTriggerReqParameters& params);
virtual void SchedUlNoiseInterferenceReq (const struct SchedUlNoiseInterferenceReqParameters& params);
virtual void SchedUlSrInfoReq (const struct SchedUlSrInfoReqParameters& params);
virtual void SchedUlMacCtrlInfoReq (const struct SchedUlMacCtrlInfoReqParameters& params);
virtual void SchedUlCqiInfoReq (const struct SchedUlCqiInfoReqParameters& params);
private:
RrSchedulerMemberSchedSapProvider ();
RrFfMacScheduler* m_scheduler;
};
RrSchedulerMemberSchedSapProvider::RrSchedulerMemberSchedSapProvider ()
{
}
RrSchedulerMemberSchedSapProvider::RrSchedulerMemberSchedSapProvider (RrFfMacScheduler* scheduler)
: m_scheduler (scheduler)
{
}
void
RrSchedulerMemberSchedSapProvider::SchedDlRlcBufferReq (const struct SchedDlRlcBufferReqParameters& params)
{
m_scheduler->DoSchedDlRlcBufferReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedDlPagingBufferReq (const struct SchedDlPagingBufferReqParameters& params)
{
m_scheduler->DoSchedDlPagingBufferReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedDlMacBufferReq (const struct SchedDlMacBufferReqParameters& params)
{
m_scheduler->DoSchedDlMacBufferReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedDlTriggerReq (const struct SchedDlTriggerReqParameters& params)
{
m_scheduler->DoSchedDlTriggerReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedDlRachInfoReq (const struct SchedDlRachInfoReqParameters& params)
{
m_scheduler->DoSchedDlRachInfoReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedDlCqiInfoReq (const struct SchedDlCqiInfoReqParameters& params)
{
m_scheduler->DoSchedDlCqiInfoReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedUlTriggerReq (const struct SchedUlTriggerReqParameters& params)
{
m_scheduler->DoSchedUlTriggerReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedUlNoiseInterferenceReq (const struct SchedUlNoiseInterferenceReqParameters& params)
{
m_scheduler->DoSchedUlNoiseInterferenceReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedUlSrInfoReq (const struct SchedUlSrInfoReqParameters& params)
{
m_scheduler->DoSchedUlSrInfoReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedUlMacCtrlInfoReq (const struct SchedUlMacCtrlInfoReqParameters& params)
{
m_scheduler->DoSchedUlMacCtrlInfoReq (params);
}
void
RrSchedulerMemberSchedSapProvider::SchedUlCqiInfoReq (const struct SchedUlCqiInfoReqParameters& params)
{
m_scheduler->DoSchedUlCqiInfoReq (params);
}
RrFfMacScheduler::RrFfMacScheduler ()
: m_cschedSapUser (0),
m_schedSapUser (0),
m_nextRntiDl (0),
m_nextRntiUl (0)
{
m_amc = CreateObject <LteAmc> ();
m_cschedSapProvider = new RrSchedulerMemberCschedSapProvider (this);
m_schedSapProvider = new RrSchedulerMemberSchedSapProvider (this);
}
RrFfMacScheduler::~RrFfMacScheduler ()
{
NS_LOG_FUNCTION (this);
}
void
RrFfMacScheduler::DoDispose ()
{
NS_LOG_FUNCTION (this);
m_dlHarqProcessesDciBuffer.clear ();
m_dlHarqProcessesRlcPduListBuffer.clear ();
m_dlInfoListBuffered.clear ();
m_ulHarqCurrentProcessId.clear ();
m_ulHarqProcessesStatus.clear ();
m_ulHarqProcessesDciBuffer.clear ();
delete m_cschedSapProvider;
delete m_schedSapProvider;
}
TypeId
RrFfMacScheduler::GetTypeId (void)
{
static TypeId tid = TypeId ("ns3::RrFfMacScheduler")
.SetParent<FfMacScheduler> ()
.AddConstructor<RrFfMacScheduler> ()
.AddAttribute ("CqiTimerThreshold",
"The number of TTIs a CQI is valid (default 1000 - 1 sec.)",
UintegerValue (1000),
MakeUintegerAccessor (&RrFfMacScheduler::m_cqiTimersThreshold),
MakeUintegerChecker<uint32_t> ())
.AddAttribute ("HarqEnabled",
"Activate/Deactivate the HARQ [by default is active].",
BooleanValue (true),
MakeBooleanAccessor (&RrFfMacScheduler::m_harqOn),
MakeBooleanChecker ())
.AddAttribute ("UlGrantMcs",
"The MCS of the UL grant, must be [0..15] (default 0)",
UintegerValue (0),
MakeUintegerAccessor (&RrFfMacScheduler::m_ulGrantMcs),
MakeUintegerChecker<uint8_t> ())
;
return tid;
}
void
RrFfMacScheduler::SetFfMacCschedSapUser (FfMacCschedSapUser* s)
{
m_cschedSapUser = s;
}
void
RrFfMacScheduler::SetFfMacSchedSapUser (FfMacSchedSapUser* s)
{
m_schedSapUser = s;
}
FfMacCschedSapProvider*
RrFfMacScheduler::GetFfMacCschedSapProvider ()
{
return m_cschedSapProvider;
}
FfMacSchedSapProvider*
RrFfMacScheduler::GetFfMacSchedSapProvider ()
{
return m_schedSapProvider;
}
void
RrFfMacScheduler::DoCschedCellConfigReq (const struct FfMacCschedSapProvider::CschedCellConfigReqParameters& params)
{
NS_LOG_FUNCTION (this);
// Read the subset of parameters used
m_cschedCellConfig = params;
m_rachAllocationMap.resize (m_cschedCellConfig.m_ulBandwidth, 0);
FfMacCschedSapUser::CschedUeConfigCnfParameters cnf;
cnf.m_result = SUCCESS;
m_cschedSapUser->CschedUeConfigCnf (cnf);
return;
}
void
RrFfMacScheduler::DoCschedUeConfigReq (const struct FfMacCschedSapProvider::CschedUeConfigReqParameters& params)
{
NS_LOG_FUNCTION (this << " RNTI " << params.m_rnti << " txMode " << (uint16_t)params.m_transmissionMode);
std::map <uint16_t,uint8_t>::iterator it = m_uesTxMode.find (params.m_rnti);
if (it == m_uesTxMode.end ())
{
m_uesTxMode.insert (std::pair <uint16_t, double> (params.m_rnti, params.m_transmissionMode));
// generate HARQ buffers
m_dlHarqCurrentProcessId.insert (std::pair <uint16_t,uint8_t > (params.m_rnti, 0));
DlHarqProcessesStatus_t dlHarqPrcStatus;
dlHarqPrcStatus.resize (8,0);
m_dlHarqProcessesStatus.insert (std::pair <uint16_t, DlHarqProcessesStatus_t> (params.m_rnti, dlHarqPrcStatus));
DlHarqProcessesDciBuffer_t dlHarqdci;
dlHarqdci.resize (8);
m_dlHarqProcessesDciBuffer.insert (std::pair <uint16_t, DlHarqProcessesDciBuffer_t> (params.m_rnti, dlHarqdci));
DlHarqRlcPduListBuffer_t dlHarqRlcPdu;
dlHarqRlcPdu.resize (2);
dlHarqRlcPdu.at (0).resize (8);
dlHarqRlcPdu.at (1).resize (8);
m_dlHarqProcessesRlcPduListBuffer.insert (std::pair <uint16_t, DlHarqRlcPduListBuffer_t> (params.m_rnti, dlHarqRlcPdu));
m_ulHarqCurrentProcessId.insert (std::pair <uint16_t,uint8_t > (params.m_rnti, 0));
UlHarqProcessesStatus_t ulHarqPrcStatus;
ulHarqPrcStatus.resize (8,0);
m_ulHarqProcessesStatus.insert (std::pair <uint16_t, UlHarqProcessesStatus_t> (params.m_rnti, ulHarqPrcStatus));
UlHarqProcessesDciBuffer_t ulHarqdci;
ulHarqdci.resize (8);
m_ulHarqProcessesDciBuffer.insert (std::pair <uint16_t, UlHarqProcessesDciBuffer_t> (params.m_rnti, ulHarqdci));
}
else
{
(*it).second = params.m_transmissionMode;
}
return;
}
void
RrFfMacScheduler::DoCschedLcConfigReq (const struct FfMacCschedSapProvider::CschedLcConfigReqParameters& params)
{
NS_LOG_FUNCTION (this);
// Not used at this stage (LCs updated by DoSchedDlRlcBufferReq)
return;
}
void
RrFfMacScheduler::DoCschedLcReleaseReq (const struct FfMacCschedSapProvider::CschedLcReleaseReqParameters& params)
{
NS_LOG_FUNCTION (this);
for (uint16_t i = 0; i < params.m_logicalChannelIdentity.size (); i++)
{
std::list<FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator it = m_rlcBufferReq.begin ();
while (it!=m_rlcBufferReq.end ())
{
if (((*it).m_rnti == params.m_rnti)&&((*it).m_logicalChannelIdentity == params.m_logicalChannelIdentity.at (i)))
{
it = m_rlcBufferReq.erase (it);
}
else
{
it++;
}
}
}
return;
}
void
RrFfMacScheduler::DoCschedUeReleaseReq (const struct FfMacCschedSapProvider::CschedUeReleaseReqParameters& params)
{
NS_LOG_FUNCTION (this << " Release RNTI " << params.m_rnti);
m_uesTxMode.erase (params.m_rnti);
m_dlHarqCurrentProcessId.erase (params.m_rnti);
m_dlHarqProcessesStatus.erase (params.m_rnti);
m_dlHarqProcessesDciBuffer.erase (params.m_rnti);
m_dlHarqProcessesRlcPduListBuffer.erase (params.m_rnti);
m_ulHarqCurrentProcessId.erase (params.m_rnti);
m_ulHarqProcessesStatus.erase (params.m_rnti);
m_ulHarqProcessesDciBuffer.erase (params.m_rnti);
m_ceBsrRxed.erase (params.m_rnti);
std::list<FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator it = m_rlcBufferReq.begin ();
while (it != m_rlcBufferReq.end ())
{
if ((*it).m_rnti == params.m_rnti)
{
NS_LOG_DEBUG (this << " Erase RNTI " << (*it).m_rnti << " LC " << (uint16_t)(*it).m_logicalChannelIdentity);
it = m_rlcBufferReq.erase (it);
}
else
{
it++;
}
}
if (m_nextRntiUl == params.m_rnti)
{
m_nextRntiUl = 0;
}
if (m_nextRntiDl == params.m_rnti)
{
m_nextRntiDl = 0;
}
return;
}
void
RrFfMacScheduler::DoSchedDlRlcBufferReq (const struct FfMacSchedSapProvider::SchedDlRlcBufferReqParameters& params)
{
NS_LOG_FUNCTION (this << params.m_rnti << (uint32_t) params.m_logicalChannelIdentity);
// API generated by RLC for updating RLC parameters on a LC (tx and retx queues)
std::list<FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator it = m_rlcBufferReq.begin ();
bool newLc = true;
while (it != m_rlcBufferReq.end ())
{
// remove old entries of this UE-LC
if (((*it).m_rnti == params.m_rnti)&&((*it).m_logicalChannelIdentity == params.m_logicalChannelIdentity))
{
it = m_rlcBufferReq.erase (it);
newLc = false;
}
else
{
++it;
}
}
// add the new parameters
m_rlcBufferReq.insert (it, params);
NS_LOG_INFO (this << " RNTI " << params.m_rnti << " LC " << (uint16_t)params.m_logicalChannelIdentity << " RLC tx size " << params.m_rlcTransmissionQueueHolDelay << " RLC retx size " << params.m_rlcRetransmissionQueueSize << " RLC stat size " << params.m_rlcStatusPduSize);
// initialize statistics of the flow in case of new flows
if (newLc == true)
{
m_p10CqiRxed.insert ( std::pair<uint16_t, uint8_t > (params.m_rnti, 1)); // only codeword 0 at this stage (SISO)
// initialized to 1 (i.e., the lowest value for transmitting a signal)
m_p10CqiTimers.insert ( std::pair<uint16_t, uint32_t > (params.m_rnti, m_cqiTimersThreshold));
}
return;
}
void
RrFfMacScheduler::DoSchedDlPagingBufferReq (const struct FfMacSchedSapProvider::SchedDlPagingBufferReqParameters& params)
{
NS_LOG_FUNCTION (this);
// TODO: Implementation of the API
return;
}
void
RrFfMacScheduler::DoSchedDlMacBufferReq (const struct FfMacSchedSapProvider::SchedDlMacBufferReqParameters& params)
{
NS_LOG_FUNCTION (this);
// TODO: Implementation of the API
return;
}
int
RrFfMacScheduler::GetRbgSize (int dlbandwidth)
{
for (int i = 0; i < 4; i++)
{
if (dlbandwidth < Type0AllocationRbg[i])
{
return (i + 1);
}
}
return (-1);
}
bool
RrFfMacScheduler::SortRlcBufferReq (FfMacSchedSapProvider::SchedDlRlcBufferReqParameters i,FfMacSchedSapProvider::SchedDlRlcBufferReqParameters j)
{
return (i.m_rnti < j.m_rnti);
}
uint8_t
RrFfMacScheduler::HarqProcessAvailability (uint16_t rnti)
{
NS_LOG_FUNCTION (this << rnti);
std::map <uint16_t, uint8_t>::iterator it = m_dlHarqCurrentProcessId.find (rnti);
if (it == m_dlHarqCurrentProcessId.end ())
{
NS_FATAL_ERROR ("No Process Id found for this RNTI " << rnti);
}
std::map <uint16_t, DlHarqProcessesStatus_t>::iterator itStat = m_dlHarqProcessesStatus.find (rnti);
if (itStat == m_dlHarqProcessesStatus.end ())
{
NS_FATAL_ERROR ("No Process Id Statusfound for this RNTI " << rnti);
}
uint8_t i = (*it).second;
do
{
i = (i + 1) % HARQ_PROC_NUM;
}
while ( ((*itStat).second.at (i) != 0)&&(i != (*it).second));
if ((*itStat).second.at (i) == 0)
{
return (true);
}
else
{
return (false); // return a not valid harq proc id
}
}
uint8_t
RrFfMacScheduler::UpdateHarqProcessId (uint16_t rnti)
{
NS_LOG_FUNCTION (this << rnti);
if (m_harqOn == false)
{
return (0);
}
std::map <uint16_t, uint8_t>::iterator it = m_dlHarqCurrentProcessId.find (rnti);
if (it == m_dlHarqCurrentProcessId.end ())
{
NS_FATAL_ERROR ("No Process Id found for this RNTI " << rnti);
}
std::map <uint16_t, DlHarqProcessesStatus_t>::iterator itStat = m_dlHarqProcessesStatus.find (rnti);
if (itStat == m_dlHarqProcessesStatus.end ())
{
NS_FATAL_ERROR ("No Process Id Statusfound for this RNTI " << rnti);
}
uint8_t i = (*it).second;
do
{
i = (i + 1) % HARQ_PROC_NUM;
}
while ( ((*itStat).second.at (i) != 0)&&(i != (*it).second));
if ((*itStat).second.at (i) == 0)
{
(*it).second = i;
(*itStat).second.at (i) = 1;
}
else
{
return (9); // return a not valid harq proc id
}
return ((*it).second);
}
void
RrFfMacScheduler::DoSchedDlTriggerReq (const struct FfMacSchedSapProvider::SchedDlTriggerReqParameters& params)
{
NS_LOG_FUNCTION (this << " DL Frame no. " << (params.m_sfnSf >> 4) << " subframe no. " << (0xF & params.m_sfnSf));
// API generated by RLC for triggering the scheduling of a DL subframe
RefreshDlCqiMaps ();
int rbgSize = GetRbgSize (m_cschedCellConfig.m_dlBandwidth);
int rbgNum = m_cschedCellConfig.m_dlBandwidth / rbgSize;
FfMacSchedSapUser::SchedDlConfigIndParameters ret;
// Generate RBGs map
std::vector <bool> rbgMap;
uint16_t rbgAllocatedNum = 0;
std::set <uint16_t> rntiAllocated;
rbgMap.resize (m_cschedCellConfig.m_dlBandwidth / rbgSize, false);
// RACH Allocation
m_rachAllocationMap.resize (m_cschedCellConfig.m_ulBandwidth, 0);
uint16_t rbStart = 0;
std::vector <struct RachListElement_s>::iterator itRach;
for (itRach = m_rachList.begin (); itRach != m_rachList.end (); itRach++)
{
NS_ASSERT_MSG (m_amc->GetTbSizeFromMcs (m_ulGrantMcs, m_cschedCellConfig.m_ulBandwidth) > (*itRach).m_estimatedSize, " Default UL Grant MCS does not allow to send RACH messages");
BuildRarListElement_s newRar;
newRar.m_rnti = (*itRach).m_rnti;
// DL-RACH Allocation
// Ideal: no needs of configuring m_dci
// UL-RACH Allocation
newRar.m_grant.m_rnti = newRar.m_rnti;
newRar.m_grant.m_mcs = m_ulGrantMcs;
uint16_t rbLen = 1;
uint16_t tbSizeBits = 0;
// find lowest TB size that fits UL grant estimated size
while ((tbSizeBits < (*itRach).m_estimatedSize) && (rbStart + rbLen < m_cschedCellConfig.m_ulBandwidth))
{
rbLen++;
tbSizeBits = m_amc->GetTbSizeFromMcs (m_ulGrantMcs, rbLen);
}
if (tbSizeBits < (*itRach).m_estimatedSize)
{
// no more allocation space: finish allocation
break;
}
newRar.m_grant.m_rbStart = rbStart;
newRar.m_grant.m_rbLen = rbLen;
newRar.m_grant.m_tbSize = tbSizeBits / 8;
newRar.m_grant.m_hopping = false;
newRar.m_grant.m_tpc = 0;
newRar.m_grant.m_cqiRequest = false;
newRar.m_grant.m_ulDelay = false;
NS_LOG_INFO (this << " UL grant allocated to RNTI " << (*itRach).m_rnti << " rbStart " << rbStart << " rbLen " << rbLen << " MCS " << (uint16_t) m_ulGrantMcs << " tbSize " << newRar.m_grant.m_tbSize);
for (uint16_t i = rbStart; i < rbStart + rbLen; i++)
{
m_rachAllocationMap.at (i) = (*itRach).m_rnti;
}
rbStart = rbStart + rbLen;
ret.m_buildRarList.push_back (newRar);
}
m_rachList.clear ();
// Process DL HARQ feedback
// retrieve past HARQ retx buffered
if (m_dlInfoListBuffered.size () > 0)
{
if (params.m_dlInfoList.size () > 0)
{
NS_LOG_INFO (this << " Received DL-HARQ feedback");
m_dlInfoListBuffered.insert (m_dlInfoListBuffered.end (), params.m_dlInfoList.begin (), params.m_dlInfoList.end ());
}
}
else
{
if (params.m_dlInfoList.size () > 0)
{
m_dlInfoListBuffered = params.m_dlInfoList;
}
}
if (m_harqOn == false)
{
// Ignore HARQ feedback
m_dlInfoListBuffered.clear ();
}
std::vector <struct DlInfoListElement_s> dlInfoListUntxed;
for (uint8_t i = 0; i < m_dlInfoListBuffered.size (); i++)
{
std::set <uint16_t>::iterator itRnti = rntiAllocated.find (m_dlInfoListBuffered.at (i).m_rnti);
if (itRnti != rntiAllocated.end ())
{
// RNTI already allocated for retx
continue;
}
uint8_t nLayers = m_dlInfoListBuffered.at (i).m_harqStatus.size ();
std::vector <bool> retx;
NS_LOG_INFO (this << " Processing DLHARQ feedback");
if (nLayers == 1)
{
retx.push_back (m_dlInfoListBuffered.at (i).m_harqStatus.at (0) == DlInfoListElement_s::NACK);
retx.push_back (false);
}
else
{
retx.push_back (m_dlInfoListBuffered.at (i).m_harqStatus.at (0) == DlInfoListElement_s::NACK);
retx.push_back (m_dlInfoListBuffered.at (i).m_harqStatus.at (1) == DlInfoListElement_s::NACK);
}
if (retx.at (0) || retx.at (1))
{
// retrieve HARQ process information
uint16_t rnti = m_dlInfoListBuffered.at (i).m_rnti;
uint8_t harqId = m_dlInfoListBuffered.at (i).m_harqProcessId;
NS_LOG_INFO (this << " HARQ retx RNTI " << rnti << " harqId " << (uint16_t)harqId);
std::map <uint16_t, DlHarqProcessesDciBuffer_t>::iterator itHarq = m_dlHarqProcessesDciBuffer.find (rnti);
if (itHarq == m_dlHarqProcessesDciBuffer.end ())
{
NS_FATAL_ERROR ("No info find in HARQ buffer for UE " << rnti);
}
DlDciListElement_s dci = (*itHarq).second.at (harqId);
int rv = 0;
if (dci.m_rv.size () == 1)
{
rv = dci.m_rv.at (0);
}
else
{
rv = (dci.m_rv.at (0) > dci.m_rv.at (1) ? dci.m_rv.at (0) : dci.m_rv.at (1));
}
if (rv == 3)
{
// maximum number of retx reached -> drop process
NS_LOG_INFO ("Max number of retransmissions reached -> drop process");
std::map <uint16_t, DlHarqProcessesStatus_t>::iterator it = m_dlHarqProcessesStatus.find (rnti);
if (it == m_dlHarqProcessesStatus.end ())
{
NS_LOG_ERROR ("No info find in HARQ buffer for UE (might change eNB) " << m_dlInfoListBuffered.at (i).m_rnti);
}
(*it).second.at (harqId) = 0;
std::map <uint16_t, DlHarqRlcPduListBuffer_t>::iterator itRlcPdu = m_dlHarqProcessesRlcPduListBuffer.find (rnti);
if (itRlcPdu == m_dlHarqProcessesRlcPduListBuffer.end ())
{
NS_FATAL_ERROR ("Unable to find RlcPdcList in HARQ buffer for RNTI " << m_dlInfoListBuffered.at (i).m_rnti);
}
for (uint16_t k = 0; k < (*itRlcPdu).second.size (); k++)
{
(*itRlcPdu).second.at (k).at (harqId).clear ();
}
continue;
}
// check the feasibility of retransmitting on the same RBGs
// translate the DCI to Spectrum framework
std::vector <int> dciRbg;
uint32_t mask = 0x1;
NS_LOG_INFO ("Original RBGs " << dci.m_rbBitmap << " rnti " << dci.m_rnti);
for (int j = 0; j < 32; j++)
{
if (((dci.m_rbBitmap & mask) >> j) == 1)
{
dciRbg.push_back (j);
NS_LOG_INFO ("\t" << j);
}
mask = (mask << 1);
}
bool free = true;
for (uint8_t j = 0; j < dciRbg.size (); j++)
{
if (rbgMap.at (dciRbg.at (j)) == true)
{
free = false;
break;
}
}
if (free)
{
// use the same RBGs for the retx
// reserve RBGs
for (uint8_t j = 0; j < dciRbg.size (); j++)
{
rbgMap.at (dciRbg.at (j)) = true;
NS_LOG_INFO ("RBG " << dciRbg.at (j) << " assigned");
rbgAllocatedNum++;
}
NS_LOG_INFO (this << " Send retx in the same RBGs");
}
else
{
// find RBGs for sending HARQ retx
uint8_t j = 0;
uint8_t rbgId = (dciRbg.at (dciRbg.size () - 1) + 1) % rbgNum;
uint8_t startRbg = dciRbg.at (dciRbg.size () - 1);
std::vector <bool> rbgMapCopy = rbgMap;
while ((j < dciRbg.size ())&&(startRbg != rbgId))
{
if (rbgMapCopy.at (rbgId) == false)
{
rbgMapCopy.at (rbgId) = true;
dciRbg.at (j) = rbgId;
j++;
}
rbgId++;
}
if (j == dciRbg.size ())
{
// find new RBGs -> update DCI map
uint32_t rbgMask = 0;
for (uint16_t k = 0; k < dciRbg.size (); k++)
{
rbgMask = rbgMask + (0x1 << dciRbg.at (k));
NS_LOG_INFO (this << " New allocated RBG " << dciRbg.at (k));
rbgAllocatedNum++;
}
dci.m_rbBitmap = rbgMask;
rbgMap = rbgMapCopy;
}
else
{
// HARQ retx cannot be performed on this TTI -> store it
dlInfoListUntxed.push_back (params.m_dlInfoList.at (i));
NS_LOG_INFO (this << " No resource for this retx -> buffer it");
}
}
// retrieve RLC PDU list for retx TBsize and update DCI
BuildDataListElement_s newEl;
std::map <uint16_t, DlHarqRlcPduListBuffer_t>::iterator itRlcPdu = m_dlHarqProcessesRlcPduListBuffer.find (rnti);
if (itRlcPdu == m_dlHarqProcessesRlcPduListBuffer.end ())
{
NS_FATAL_ERROR ("Unable to find RlcPdcList in HARQ buffer for RNTI " << rnti);
}
for (uint8_t j = 0; j < nLayers; j++)
{
if (retx.at (j))
{
if (j >= dci.m_ndi.size ())
{
// for avoiding errors in MIMO transient phases
dci.m_ndi.push_back (0);
dci.m_rv.push_back (0);
dci.m_mcs.push_back (0);
dci.m_tbsSize.push_back (0);
NS_LOG_INFO (this << " layer " << (uint16_t)j << " no txed (MIMO transition)");
}
else
{
dci.m_ndi.at (j) = 0;
dci.m_rv.at (j)++;
(*itHarq).second.at (harqId).m_rv.at (j)++;
NS_LOG_INFO (this << " layer " << (uint16_t)j << " RV " << (uint16_t)dci.m_rv.at (j));
}
}
else
{
// empty TB of layer j
dci.m_ndi.at (j) = 0;
dci.m_rv.at (j) = 0;
dci.m_mcs.at (j) = 0;
dci.m_tbsSize.at (j) = 0;
NS_LOG_INFO (this << " layer " << (uint16_t)j << " no retx");
}
}
for (uint16_t k = 0; k < (*itRlcPdu).second.at (0).at (dci.m_harqProcess).size (); k++)
{
std::vector <struct RlcPduListElement_s> rlcPduListPerLc;
for (uint8_t j = 0; j < nLayers; j++)
{
if (retx.at (j))
{
if (j < dci.m_ndi.size ())
{
rlcPduListPerLc.push_back ((*itRlcPdu).second.at (j).at (dci.m_harqProcess).at (k));
}
}
}
if (rlcPduListPerLc.size () > 0)
{
newEl.m_rlcPduList.push_back (rlcPduListPerLc);
}
}
newEl.m_rnti = rnti;
newEl.m_dci = dci;
(*itHarq).second.at (harqId).m_rv = dci.m_rv;
ret.m_buildDataList.push_back (newEl);
rntiAllocated.insert (rnti);
}
else
{
// update HARQ process status
NS_LOG_INFO (this << " HARQ ACK UE " << m_dlInfoListBuffered.at (i).m_rnti);
std::map <uint16_t, DlHarqProcessesStatus_t>::iterator it = m_dlHarqProcessesStatus.find (m_dlInfoListBuffered.at (i).m_rnti);
if (it == m_dlHarqProcessesStatus.end ())
{
NS_FATAL_ERROR ("No info find in HARQ buffer for UE " << m_dlInfoListBuffered.at (i).m_rnti);
}
(*it).second.at (m_dlInfoListBuffered.at (i).m_harqProcessId) = 0;
std::map <uint16_t, DlHarqRlcPduListBuffer_t>::iterator itRlcPdu = m_dlHarqProcessesRlcPduListBuffer.find (m_dlInfoListBuffered.at (i).m_rnti);
if (itRlcPdu == m_dlHarqProcessesRlcPduListBuffer.end ())
{
NS_FATAL_ERROR ("Unable to find RlcPdcList in HARQ buffer for RNTI " << m_dlInfoListBuffered.at (i).m_rnti);
}
for (uint16_t k = 0; k < (*itRlcPdu).second.size (); k++)
{
(*itRlcPdu).second.at (k).at (m_dlInfoListBuffered.at (i).m_harqProcessId).clear ();
}
}
}
m_dlInfoListBuffered.clear ();
m_dlInfoListBuffered = dlInfoListUntxed;
// Get the actual active flows (queue!=0)
std::list<FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator it;
m_rlcBufferReq.sort (SortRlcBufferReq);
int nflows = 0;
int nTbs = 0;
std::map <uint16_t,uint8_t> lcActivesPerRnti; // tracks how many active LCs per RNTI there are
std::map <uint16_t,uint8_t>::iterator itLcRnti;
for (it = m_rlcBufferReq.begin (); it != m_rlcBufferReq.end (); it++)
{
// remove old entries of this UE-LC
std::set <uint16_t>::iterator itRnti = rntiAllocated.find ((*it).m_rnti);
if ( (((*it).m_rlcTransmissionQueueSize > 0)
|| ((*it).m_rlcRetransmissionQueueSize > 0)
|| ((*it).m_rlcStatusPduSize > 0))
&& (itRnti == rntiAllocated.end ()) // UE must not be allocated for HARQ retx
&& (HarqProcessAvailability ((*it).m_rnti)) ) // UE needs HARQ proc free
{
NS_LOG_LOGIC (this << " User " << (*it).m_rnti << " LC " << (uint16_t)(*it).m_logicalChannelIdentity << " is active, status " << (*it).m_rlcStatusPduSize << " retx " << (*it).m_rlcRetransmissionQueueSize << " tx " << (*it).m_rlcTransmissionQueueSize);
std::map <uint16_t,uint8_t>::iterator itCqi = m_p10CqiRxed.find ((*it).m_rnti);
uint8_t cqi = 0;
if (itCqi != m_p10CqiRxed.end ())
{
cqi = (*itCqi).second;
}
else
{
cqi = 1; // lowest value fro trying a transmission
}
if (cqi != 0)
{
// CQI == 0 means "out of range" (see table 7.2.3-1 of 36.213)
nflows++;
itLcRnti = lcActivesPerRnti.find ((*it).m_rnti);
if (itLcRnti != lcActivesPerRnti.end ())
{
(*itLcRnti).second++;
}
else
{
lcActivesPerRnti.insert (std::pair<uint16_t, uint8_t > ((*it).m_rnti, 1));
nTbs++;
}
}
}
}
if (nflows == 0)
{
if ((ret.m_buildDataList.size () > 0) || (ret.m_buildRarList.size () > 0))
{
m_schedSapUser->SchedDlConfigInd (ret);
}
return;
}
// Divide the resource equally among the active users according to
// Resource allocation type 0 (see sec 7.1.6.1 of 36.213)
int rbgPerTb = (rbgNum - rbgAllocatedNum) / nTbs;
NS_LOG_DEBUG (this << " Flows to be transmitted " << nflows << " rbgPerTb " << rbgPerTb);
if (rbgPerTb == 0)
{
rbgPerTb = 1; // at least 1 rbg per TB (till available resource)
}
int rbgAllocated = 0;
// round robin assignment to all UEs registered starting from the subsequent of the one
// served last scheduling trigger event
if (m_nextRntiDl != 0)
{
for (it = m_rlcBufferReq.begin (); it != m_rlcBufferReq.end (); it++)
{
if ((*it).m_rnti == m_nextRntiDl)
{
break;
}
}
if (it == m_rlcBufferReq.end ())
{
NS_LOG_ERROR (this << " no user found");
}
}
else
{
it = m_rlcBufferReq.begin ();
m_nextRntiDl = (*it).m_rnti;
}
std::map <uint16_t,uint8_t>::iterator itTxMode;
do
{
itLcRnti = lcActivesPerRnti.find ((*it).m_rnti);
std::set <uint16_t>::iterator itRnti = rntiAllocated.find ((*it).m_rnti);
if ((itLcRnti == lcActivesPerRnti.end ())||(itRnti != rntiAllocated.end ()))
{
// skip this RNTI (no active queue or yet allocated for HARQ)
uint16_t rntiDiscared = (*it).m_rnti;
while (it != m_rlcBufferReq.end ())
{
if ((*it).m_rnti != rntiDiscared)
{
break;
}
it++;
}
if (it == m_rlcBufferReq.end ())
{
// restart from the first
it = m_rlcBufferReq.begin ();
}
continue;
}
itTxMode = m_uesTxMode.find ((*it).m_rnti);
if (itTxMode == m_uesTxMode.end ())
{
NS_FATAL_ERROR ("No Transmission Mode info on user " << (*it).m_rnti);
}
int nLayer = TransmissionModesLayers::TxMode2LayerNum ((*itTxMode).second);
int lcNum = (*itLcRnti).second;
// create new BuildDataListElement_s for this RNTI
BuildDataListElement_s newEl;
newEl.m_rnti = (*it).m_rnti;
// create the DlDciListElement_s
DlDciListElement_s newDci;
newDci.m_rnti = (*it).m_rnti;
newDci.m_harqProcess = UpdateHarqProcessId ((*it).m_rnti);
newDci.m_resAlloc = 0;
newDci.m_rbBitmap = 0;
std::map <uint16_t,uint8_t>::iterator itCqi = m_p10CqiRxed.find (newEl.m_rnti);
for (uint8_t i = 0; i < nLayer; i++)
{
if (itCqi == m_p10CqiRxed.end ())
{
newDci.m_mcs.push_back (0); // no info on this user -> lowest MCS
}
else
{
newDci.m_mcs.push_back ( m_amc->GetMcsFromCqi ((*itCqi).second) );
}
}
int tbSize = (m_amc->GetTbSizeFromMcs (newDci.m_mcs.at (0), rbgPerTb * rbgSize) / 8);
uint16_t rlcPduSize = tbSize / lcNum;
while (lcNum > 0)
{
if ( ((*it).m_rlcTransmissionQueueSize > 0)
|| ((*it).m_rlcRetransmissionQueueSize > 0)
|| ((*it).m_rlcStatusPduSize > 0) )
{
std::vector <struct RlcPduListElement_s> newRlcPduLe;
for (uint8_t j = 0; j < nLayer; j++)
{
RlcPduListElement_s newRlcEl;
newRlcEl.m_logicalChannelIdentity = (*it).m_logicalChannelIdentity;
NS_LOG_INFO (this << "LCID " << (uint32_t) newRlcEl.m_logicalChannelIdentity << " size " << rlcPduSize << " ID " << (*it).m_rnti << " layer " << (uint16_t)j);
newRlcEl.m_size = rlcPduSize;
UpdateDlRlcBufferInfo ((*it).m_rnti, newRlcEl.m_logicalChannelIdentity, rlcPduSize);
newRlcPduLe.push_back (newRlcEl);
if (m_harqOn == true)
{
// store RLC PDU list for HARQ
std::map <uint16_t, DlHarqRlcPduListBuffer_t>::iterator itRlcPdu = m_dlHarqProcessesRlcPduListBuffer.find ((*it).m_rnti);
if (itRlcPdu == m_dlHarqProcessesRlcPduListBuffer.end ())
{
NS_FATAL_ERROR ("Unable to find RlcPdcList in HARQ buffer for RNTI " << (*it).m_rnti);
}
(*itRlcPdu).second.at (j).at (newDci.m_harqProcess).push_back (newRlcEl);
}
}
newEl.m_rlcPduList.push_back (newRlcPduLe);
lcNum--;
}
it++;
if (it == m_rlcBufferReq.end ())
{
// restart from the first
it = m_rlcBufferReq.begin ();
}
}
uint32_t rbgMask = 0;
uint16_t i = 0;
NS_LOG_INFO (this << " DL - Allocate user " << newEl.m_rnti << " LCs " << (uint16_t)(*itLcRnti).second << " bytes " << tbSize << " mcs " << (uint16_t) newDci.m_mcs.at (0) << " harqId " << (uint16_t)newDci.m_harqProcess << " layers " << nLayer);
NS_LOG_DEBUG ("RBG:");
while (i < rbgPerTb)
{
if (rbgMap.at (rbgAllocated) == false)
{
rbgMask = rbgMask + (0x1 << rbgAllocated);
NS_LOG_DEBUG ("\t " << rbgAllocated);
i++;
rbgMap.at (rbgAllocated) = true;
}
rbgAllocated++;
}
newDci.m_rbBitmap = rbgMask; // (32 bit bitmap see 7.1.6 of 36.213)
for (int i = 0; i < nLayer; i++)
{
newDci.m_tbsSize.push_back (tbSize);
newDci.m_ndi.push_back (1);
newDci.m_rv.push_back (0);
}
newEl.m_dci = newDci;
if (m_harqOn == true)
{
// store DCI for HARQ
std::map <uint16_t, DlHarqProcessesDciBuffer_t>::iterator itDci = m_dlHarqProcessesDciBuffer.find (newEl.m_rnti);
if (itDci == m_dlHarqProcessesDciBuffer.end ())
{
NS_FATAL_ERROR ("Unable to find RNTI entry in DCI HARQ buffer for RNTI " << (*it).m_rnti);
}
(*itDci).second.at (newDci.m_harqProcess) = newDci;
}
// ...more parameters -> ignored in this version
ret.m_buildDataList.push_back (newEl);
if (rbgAllocated == rbgNum)
{
m_nextRntiDl = (*it).m_rnti; // store last RNTI served
break; // no more RGB to be allocated
}
}
while ((*it).m_rnti != m_nextRntiDl);
ret.m_nrOfPdcchOfdmSymbols = 1; // TODO: check correct value according the DCIs txed
m_schedSapUser->SchedDlConfigInd (ret);
return;
}
void
RrFfMacScheduler::DoSchedDlRachInfoReq (const struct FfMacSchedSapProvider::SchedDlRachInfoReqParameters& params)
{
NS_LOG_FUNCTION (this);
m_rachList = params.m_rachList;
return;
}
void
RrFfMacScheduler::DoSchedDlCqiInfoReq (const struct FfMacSchedSapProvider::SchedDlCqiInfoReqParameters& params)
{
NS_LOG_FUNCTION (this);
std::map <uint16_t,uint8_t>::iterator it;
for (unsigned int i = 0; i < params.m_cqiList.size (); i++)
{
if ( params.m_cqiList.at (i).m_cqiType == CqiListElement_s::P10 )
{
// wideband CQI reporting
std::map <uint16_t,uint8_t>::iterator it;
uint16_t rnti = params.m_cqiList.at (i).m_rnti;
it = m_p10CqiRxed.find (rnti);
if (it == m_p10CqiRxed.end ())
{
// create the new entry
m_p10CqiRxed.insert ( std::pair<uint16_t, uint8_t > (rnti, params.m_cqiList.at (i).m_wbCqi.at (0)) ); // only codeword 0 at this stage (SISO)
// generate correspondent timer
m_p10CqiTimers.insert ( std::pair<uint16_t, uint32_t > (rnti, m_cqiTimersThreshold));
}
else
{
// update the CQI value
(*it).second = params.m_cqiList.at (i).m_wbCqi.at (0);
// update correspondent timer
std::map <uint16_t,uint32_t>::iterator itTimers;
itTimers = m_p10CqiTimers.find (rnti);
(*itTimers).second = m_cqiTimersThreshold;
}
}
else if ( params.m_cqiList.at (i).m_cqiType == CqiListElement_s::A30 )
{
// subband CQI reporting high layer configured
// Not used by RR Scheduler
}
else
{
NS_LOG_ERROR (this << " CQI type unknown");
}
}
return;
}
void
RrFfMacScheduler::DoSchedUlTriggerReq (const struct FfMacSchedSapProvider::SchedUlTriggerReqParameters& params)
{
NS_LOG_FUNCTION (this << " Ul - Frame no. " << (params.m_sfnSf >> 4) << " subframe no. " << (0xF & params.m_sfnSf));
RefreshUlCqiMaps ();
// Generate RBs map
FfMacSchedSapUser::SchedUlConfigIndParameters ret;
std::vector <bool> rbMap;
uint16_t rbAllocatedNum = 0;
std::set <uint16_t> rntiAllocated;
std::vector <uint16_t> rbgAllocationMap;
// update with RACH allocation map
rbgAllocationMap = m_rachAllocationMap;
//rbgAllocationMap.resize (m_cschedCellConfig.m_ulBandwidth, 0);
m_rachAllocationMap.clear ();
m_rachAllocationMap.resize (m_cschedCellConfig.m_ulBandwidth, 0);
rbMap.resize (m_cschedCellConfig.m_ulBandwidth, false);
// remove RACH allocation
for (uint16_t i = 0; i < m_cschedCellConfig.m_ulBandwidth; i++)
{
if (rbgAllocationMap.at (i) != 0)
{
rbMap.at (i) = true;
}
}
if (m_harqOn == true)
{
// Process UL HARQ feedback
// update UL HARQ proc id
std::map <uint16_t, uint8_t>::iterator itProcId;
for (itProcId = m_ulHarqCurrentProcessId.begin (); itProcId != m_ulHarqCurrentProcessId.end (); itProcId++)
{
(*itProcId).second = ((*itProcId).second + 1) % HARQ_PROC_NUM;
}
for (uint8_t i = 0; i < params.m_ulInfoList.size (); i++)
{
if (params.m_ulInfoList.at (i).m_receptionStatus == UlInfoListElement_s::NotOk)
{
// retx correspondent block: retrieve the UL-DCI
uint16_t rnti = params.m_ulInfoList.at (i).m_rnti;
itProcId = m_ulHarqCurrentProcessId.find (rnti);
if (itProcId == m_ulHarqCurrentProcessId.end ())
{
NS_LOG_ERROR ("No info find in HARQ buffer for UE (might change eNB) " << rnti);
}
uint8_t harqId = (uint8_t)((*itProcId).second - HARQ_PERIOD) % HARQ_PROC_NUM;
NS_LOG_INFO (this << " UL-HARQ retx RNTI " << rnti << " harqId " << (uint16_t)harqId);
std::map <uint16_t, UlHarqProcessesDciBuffer_t>::iterator itHarq = m_ulHarqProcessesDciBuffer.find (rnti);
if (itHarq == m_ulHarqProcessesDciBuffer.end ())
{
NS_LOG_ERROR ("No info find in UL-HARQ buffer for UE (might change eNB) " << rnti);
}
UlDciListElement_s dci = (*itHarq).second.at (harqId);
std::map <uint16_t, UlHarqProcessesStatus_t>::iterator itStat = m_ulHarqProcessesStatus.find (rnti);
if (itStat == m_ulHarqProcessesStatus.end ())
{
NS_LOG_ERROR ("No info find in HARQ buffer for UE (might change eNB) " << rnti);
}
if ((*itStat).second.at (harqId) > 3)
{
NS_LOG_INFO ("Max number of retransmissions reached (UL)-> drop process");
continue;
}
bool free = true;
for (int j = dci.m_rbStart; j < dci.m_rbStart + dci.m_rbLen; j++)
{
if (rbMap.at (j) == true)
{
free = false;
NS_LOG_INFO (this << " BUSY " << j);
}
}
if (free)
{
// retx on the same RBs
for (int j = dci.m_rbStart; j < dci.m_rbStart + dci.m_rbLen; j++)
{
rbMap.at (j) = true;
rbgAllocationMap.at (j) = dci.m_rnti;
NS_LOG_INFO ("\tRB " << j);
rbAllocatedNum++;
}
NS_LOG_INFO (this << " Send retx in the same RBGs " << (uint16_t)dci.m_rbStart << " to " << dci.m_rbStart + dci.m_rbLen << " RV " << (*itStat).second.at (harqId) + 1);
}
else
{
NS_LOG_INFO ("Cannot allocate retx due to RACH allocations for UE " << rnti);
continue;
}
dci.m_ndi = 0;
// Update HARQ buffers with new HarqId
(*itStat).second.at ((*itProcId).second) = (*itStat).second.at (harqId) + 1;
(*itStat).second.at (harqId) = 0;
(*itHarq).second.at ((*itProcId).second) = dci;
ret.m_dciList.push_back (dci);
rntiAllocated.insert (dci.m_rnti);
}
}
}
std::map <uint16_t,uint32_t>::iterator it;
int nflows = 0;
for (it = m_ceBsrRxed.begin (); it != m_ceBsrRxed.end (); it++)
{
std::set <uint16_t>::iterator itRnti = rntiAllocated.find ((*it).first);
// select UEs with queues not empty and not yet allocated for HARQ
if (((*it).second > 0)&&(itRnti == rntiAllocated.end ()))
{
nflows++;
}
}
if (nflows == 0)
{
if (ret.m_dciList.size () > 0)
{
m_schedSapUser->SchedUlConfigInd (ret);
}
return; // no flows to be scheduled
}
// Divide the remaining resources equally among the active users starting from the subsequent one served last scheduling trigger
uint16_t rbPerFlow = (m_cschedCellConfig.m_ulBandwidth) / (nflows + rntiAllocated.size ());
if (rbPerFlow == 0)
{
rbPerFlow = 1; // at least 1 rbg per flow (till available resource)
}
uint16_t rbAllocated = 0;
if (m_nextRntiUl != 0)
{
for (it = m_ceBsrRxed.begin (); it != m_ceBsrRxed.end (); it++)
{
if ((*it).first == m_nextRntiUl)
{
break;
}
}
if (it == m_ceBsrRxed.end ())
{
NS_LOG_ERROR (this << " no user found");
}
}
else
{
it = m_ceBsrRxed.begin ();
m_nextRntiUl = (*it).first;
}
NS_LOG_INFO (this << " NFlows " << nflows << " RB per Flow " << rbPerFlow);
do
{
std::set <uint16_t>::iterator itRnti = rntiAllocated.find ((*it).first);
if ((itRnti != rntiAllocated.end ())||((*it).second == 0))
{
// UE already allocated for UL-HARQ -> skip it
it++;
if (it == m_ceBsrRxed.end ())
{
// restart from the first
it = m_ceBsrRxed.begin ();
}
continue;
}
if (rbAllocated + rbPerFlow - 1 > m_cschedCellConfig.m_ulBandwidth)
{
// limit to physical resources last resource assignment
rbPerFlow = m_cschedCellConfig.m_ulBandwidth - rbAllocated;
}
NS_LOG_DEBUG (this << " try to allocate " << (*it).first);
UlDciListElement_s uldci;
uldci.m_rnti = (*it).first;
uldci.m_rbLen = rbPerFlow;
bool allocated = false;
while ((!allocated)&&((rbAllocated + rbPerFlow - 1) < m_cschedCellConfig.m_ulBandwidth) && (rbPerFlow != 0))
{
// check availability
bool free = true;
for (uint16_t j = rbAllocated; j < rbAllocated + rbPerFlow; j++)
{
if (rbMap.at (j) == true)
{
free = false;
break;
}
}
if (free)
{
uldci.m_rbStart = rbAllocated;
for (uint16_t j = rbAllocated; j < rbAllocated + rbPerFlow; j++)
{
rbMap.at (j) = true;
// store info on allocation for managing ul-cqi interpretation
rbgAllocationMap.at (j) = (*it).first;
NS_LOG_DEBUG ("\t " << j);
}
rbAllocated += rbPerFlow;
allocated = true;
break;
}
rbAllocated++;
if (rbAllocated + rbPerFlow - 1 > m_cschedCellConfig.m_ulBandwidth)
{
// limit to physical resources last resource assignment
rbPerFlow = m_cschedCellConfig.m_ulBandwidth - rbAllocated;
}
}
if (!allocated)
{
// unable to allocate new resource: finish scheduling
if (ret.m_dciList.size () > 0)
{
m_schedSapUser->SchedUlConfigInd (ret);
}
m_allocationMaps.insert (std::pair <uint16_t, std::vector <uint16_t> > (params.m_sfnSf, rbgAllocationMap));
return;
}
std::map <uint16_t, std::vector <double> >::iterator itCqi = m_ueCqi.find ((*it).first);
int cqi = 0;
if (itCqi == m_ueCqi.end ())
{
// no cqi info about this UE
uldci.m_mcs = 0; // MCS 0 -> UL-AMC TBD
NS_LOG_INFO (this << " UE does not have ULCQI " << (*it).first );
}
else
{
// take the lowest CQI value (worst RB)
double minSinr = (*itCqi).second.at (uldci.m_rbStart);
for (uint16_t i = uldci.m_rbStart; i < uldci.m_rbStart + uldci.m_rbLen; i++)
{
if ((*itCqi).second.at (i) < minSinr)
{
minSinr = (*itCqi).second.at (i);
}
}
// translate SINR -> cqi: WILD ACK: same as DL
double s = log2 ( 1 + (
pow (10, minSinr / 10 ) /
( (-log (5.0 * 0.00005 )) / 1.5) ));
cqi = m_amc->GetCqiFromSpectralEfficiency (s);
if (cqi == 0)
{
it++;
if (it == m_ceBsrRxed.end ())
{
// restart from the first
it = m_ceBsrRxed.begin ();
}
continue; // CQI == 0 means "out of range" (see table 7.2.3-1 of 36.213)
}
uldci.m_mcs = m_amc->GetMcsFromCqi (cqi);
}
uldci.m_tbSize = (m_amc->GetTbSizeFromMcs (uldci.m_mcs, rbPerFlow) / 8); // MCS 0 -> UL-AMC TBD
UpdateUlRlcBufferInfo (uldci.m_rnti, uldci.m_tbSize);
uldci.m_ndi = 1;
uldci.m_cceIndex = 0;
uldci.m_aggrLevel = 1;
uldci.m_ueTxAntennaSelection = 3; // antenna selection OFF
uldci.m_hopping = false;
uldci.m_n2Dmrs = 0;
uldci.m_tpc = 0; // no power control
uldci.m_cqiRequest = false; // only period CQI at this stage
uldci.m_ulIndex = 0; // TDD parameter
uldci.m_dai = 1; // TDD parameter
uldci.m_freqHopping = 0;
uldci.m_pdcchPowerOffset = 0; // not used
ret.m_dciList.push_back (uldci);
// store DCI for HARQ_PERIOD
uint8_t harqId = 0;
if (m_harqOn == true)
{
std::map <uint16_t, uint8_t>::iterator itProcId;
itProcId = m_ulHarqCurrentProcessId.find (uldci.m_rnti);
if (itProcId == m_ulHarqCurrentProcessId.end ())
{
NS_FATAL_ERROR ("No info find in HARQ buffer for UE " << uldci.m_rnti);
}
harqId = (*itProcId).second;
std::map <uint16_t, UlHarqProcessesDciBuffer_t>::iterator itDci = m_ulHarqProcessesDciBuffer.find (uldci.m_rnti);
if (itDci == m_ulHarqProcessesDciBuffer.end ())
{
NS_FATAL_ERROR ("Unable to find RNTI entry in UL DCI HARQ buffer for RNTI " << uldci.m_rnti);
}
(*itDci).second.at (harqId) = uldci;
}
NS_LOG_INFO (this << " UL Allocation - UE " << (*it).first << " startPRB " << (uint32_t)uldci.m_rbStart << " nPRB " << (uint32_t)uldci.m_rbLen << " CQI " << cqi << " MCS " << (uint32_t)uldci.m_mcs << " TBsize " << uldci.m_tbSize << " harqId " << (uint16_t)harqId);
it++;
if (it == m_ceBsrRxed.end ())
{
// restart from the first
it = m_ceBsrRxed.begin ();
}
if (rbAllocated == m_cschedCellConfig.m_ulBandwidth)
{
// Stop allocation: no more PRBs
m_nextRntiUl = (*it).first;
break;
}
}
while (((*it).first != m_nextRntiUl)&&(rbPerFlow!=0));
m_allocationMaps.insert (std::pair <uint16_t, std::vector <uint16_t> > (params.m_sfnSf, rbgAllocationMap));
m_schedSapUser->SchedUlConfigInd (ret);
return;
}
void
RrFfMacScheduler::DoSchedUlNoiseInterferenceReq (const struct FfMacSchedSapProvider::SchedUlNoiseInterferenceReqParameters& params)
{
NS_LOG_FUNCTION (this);
// TODO: Implementation of the API
return;
}
void
RrFfMacScheduler::DoSchedUlSrInfoReq (const struct FfMacSchedSapProvider::SchedUlSrInfoReqParameters& params)
{
NS_LOG_FUNCTION (this);
// TODO: Implementation of the API
return;
}
void
RrFfMacScheduler::DoSchedUlMacCtrlInfoReq (const struct FfMacSchedSapProvider::SchedUlMacCtrlInfoReqParameters& params)
{
NS_LOG_FUNCTION (this);
std::map <uint16_t,uint32_t>::iterator it;
for (unsigned int i = 0; i < params.m_macCeList.size (); i++)
{
if ( params.m_macCeList.at (i).m_macCeType == MacCeListElement_s::BSR )
{
// buffer status report
// note that this scheduler does not differentiate the
// allocation according to which LCGs have more/less bytes
// to send.
// Hence the BSR of different LCGs are just summed up to get
// a total queue size that is used for allocation purposes.
uint32_t buffer = 0;
for (uint8_t lcg = 0; lcg < 4; ++lcg)
{
uint8_t bsrId = params.m_macCeList.at (i).m_macCeValue.m_bufferStatus.at (lcg);
buffer += BufferSizeLevelBsr::BsrId2BufferSize (bsrId);
}
uint16_t rnti = params.m_macCeList.at (i).m_rnti;
it = m_ceBsrRxed.find (rnti);
if (it == m_ceBsrRxed.end ())
{
// create the new entry
m_ceBsrRxed.insert ( std::pair<uint16_t, uint32_t > (rnti, buffer));
NS_LOG_INFO (this << " Insert RNTI " << rnti);
}
else
{
// update the buffer size value
(*it).second = buffer;
NS_LOG_INFO (this << " Update RNTI " << rnti);
}
}
}
return;
}
void
RrFfMacScheduler::DoSchedUlCqiInfoReq (const struct FfMacSchedSapProvider::SchedUlCqiInfoReqParameters& params)
{
NS_LOG_FUNCTION (this);
switch (m_ulCqiFilter)
{
case FfMacScheduler::SRS_UL_CQI:
{
// filter all the CQIs that are not SRS based
if (params.m_ulCqi.m_type != UlCqi_s::SRS)
{
return;
}
}
break;
case FfMacScheduler::PUSCH_UL_CQI:
{
// filter all the CQIs that are not SRS based
if (params.m_ulCqi.m_type != UlCqi_s::PUSCH)
{
return;
}
}
case FfMacScheduler::ALL_UL_CQI:
break;
default:
NS_FATAL_ERROR ("Unknown UL CQI type");
}
switch (params.m_ulCqi.m_type)
{
case UlCqi_s::PUSCH:
{
std::map <uint16_t, std::vector <uint16_t> >::iterator itMap;
std::map <uint16_t, std::vector <double> >::iterator itCqi;
itMap = m_allocationMaps.find (params.m_sfnSf);
if (itMap == m_allocationMaps.end ())
{
NS_LOG_INFO (this << " Does not find info on allocation, size : " << m_allocationMaps.size ());
return;
}
for (uint32_t i = 0; i < (*itMap).second.size (); i++)
{
// convert from fixed point notation Sxxxxxxxxxxx.xxx to double
double sinr = LteFfConverter::fpS11dot3toDouble (params.m_ulCqi.m_sinr.at (i));
itCqi = m_ueCqi.find ((*itMap).second.at (i));
if (itCqi == m_ueCqi.end ())
{
// create a new entry
std::vector <double> newCqi;
for (uint32_t j = 0; j < m_cschedCellConfig.m_ulBandwidth; j++)
{
if (i == j)
{
newCqi.push_back (sinr);
}
else
{
// initialize with NO_SINR value.
newCqi.push_back (30.0);
}
}
m_ueCqi.insert (std::pair <uint16_t, std::vector <double> > ((*itMap).second.at (i), newCqi));
// generate correspondent timer
m_ueCqiTimers.insert (std::pair <uint16_t, uint32_t > ((*itMap).second.at (i), m_cqiTimersThreshold));
}
else
{
// update the value
(*itCqi).second.at (i) = sinr;
// update correspondent timer
std::map <uint16_t, uint32_t>::iterator itTimers;
itTimers = m_ueCqiTimers.find ((*itMap).second.at (i));
(*itTimers).second = m_cqiTimersThreshold;
}
}
// remove obsolete info on allocation
m_allocationMaps.erase (itMap);
}
break;
case UlCqi_s::SRS:
{
// get the RNTI from vendor specific parameters
uint16_t rnti = 0;
NS_ASSERT (params.m_vendorSpecificList.size () > 0);
for (uint16_t i = 0; i < params.m_vendorSpecificList.size (); i++)
{
if (params.m_vendorSpecificList.at (i).m_type == SRS_CQI_RNTI_VSP)
{
Ptr<SrsCqiRntiVsp> vsp = DynamicCast<SrsCqiRntiVsp> (params.m_vendorSpecificList.at (i).m_value);
rnti = vsp->GetRnti ();
}
}
std::map <uint16_t, std::vector <double> >::iterator itCqi;
itCqi = m_ueCqi.find (rnti);
if (itCqi == m_ueCqi.end ())
{
// create a new entry
std::vector <double> newCqi;
for (uint32_t j = 0; j < m_cschedCellConfig.m_ulBandwidth; j++)
{
double sinr = LteFfConverter::fpS11dot3toDouble (params.m_ulCqi.m_sinr.at (j));
newCqi.push_back (sinr);
NS_LOG_INFO (this << " RNTI " << rnti << " new SRS-CQI for RB " << j << " value " << sinr);
}
m_ueCqi.insert (std::pair <uint16_t, std::vector <double> > (rnti, newCqi));
// generate correspondent timer
m_ueCqiTimers.insert (std::pair <uint16_t, uint32_t > (rnti, m_cqiTimersThreshold));
}
else
{
// update the values
for (uint32_t j = 0; j < m_cschedCellConfig.m_ulBandwidth; j++)
{
double sinr = LteFfConverter::fpS11dot3toDouble (params.m_ulCqi.m_sinr.at (j));
(*itCqi).second.at (j) = sinr;
NS_LOG_INFO (this << " RNTI " << rnti << " update SRS-CQI for RB " << j << " value " << sinr);
}
// update correspondent timer
std::map <uint16_t, uint32_t>::iterator itTimers;
itTimers = m_ueCqiTimers.find (rnti);
(*itTimers).second = m_cqiTimersThreshold;
}
}
break;
case UlCqi_s::PUCCH_1:
case UlCqi_s::PUCCH_2:
case UlCqi_s::PRACH:
{
NS_FATAL_ERROR ("PfFfMacScheduler supports only PUSCH and SRS UL-CQIs");
}
break;
default:
NS_FATAL_ERROR ("Unknown type of UL-CQI");
}
return;
}
void
RrFfMacScheduler::RefreshDlCqiMaps (void)
{
NS_LOG_FUNCTION (this << m_p10CqiTimers.size ());
// refresh DL CQI P01 Map
std::map <uint16_t,uint32_t>::iterator itP10 = m_p10CqiTimers.begin ();
while (itP10 != m_p10CqiTimers.end ())
{
NS_LOG_INFO (this << " P10-CQI for user " << (*itP10).first << " is " << (uint32_t)(*itP10).second << " thr " << (uint32_t)m_cqiTimersThreshold);
if ((*itP10).second == 0)
{
// delete correspondent entries
std::map <uint16_t,uint8_t>::iterator itMap = m_p10CqiRxed.find ((*itP10).first);
NS_ASSERT_MSG (itMap != m_p10CqiRxed.end (), " Does not find CQI report for user " << (*itP10).first);
NS_LOG_INFO (this << " P10-CQI exired for user " << (*itP10).first);
m_p10CqiRxed.erase (itMap);
std::map <uint16_t,uint32_t>::iterator temp = itP10;
itP10++;
m_p10CqiTimers.erase (temp);
}
else
{
(*itP10).second--;
itP10++;
}
}
return;
}
void
RrFfMacScheduler::RefreshUlCqiMaps (void)
{
// refresh UL CQI Map
std::map <uint16_t,uint32_t>::iterator itUl = m_ueCqiTimers.begin ();
while (itUl != m_ueCqiTimers.end ())
{
NS_LOG_INFO (this << " UL-CQI for user " << (*itUl).first << " is " << (uint32_t)(*itUl).second << " thr " << (uint32_t)m_cqiTimersThreshold);
if ((*itUl).second == 0)
{
// delete correspondent entries
std::map <uint16_t, std::vector <double> >::iterator itMap = m_ueCqi.find ((*itUl).first);
NS_ASSERT_MSG (itMap != m_ueCqi.end (), " Does not find CQI report for user " << (*itUl).first);
NS_LOG_INFO (this << " UL-CQI exired for user " << (*itUl).first);
(*itMap).second.clear ();
m_ueCqi.erase (itMap);
std::map <uint16_t,uint32_t>::iterator temp = itUl;
itUl++;
m_ueCqiTimers.erase (temp);
}
else
{
(*itUl).second--;
itUl++;
}
}
return;
}
void
RrFfMacScheduler::UpdateDlRlcBufferInfo (uint16_t rnti, uint8_t lcid, uint16_t size)
{
NS_LOG_FUNCTION (this);
std::list<FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator it;
for (it = m_rlcBufferReq.begin (); it != m_rlcBufferReq.end (); it++)
{
if (((*it).m_rnti == rnti) && ((*it).m_logicalChannelIdentity == lcid))
{
NS_LOG_INFO (this << " UE " << rnti << " LC " << (uint16_t)lcid << " txqueue " << (*it).m_rlcTransmissionQueueSize << " retxqueue " << (*it).m_rlcRetransmissionQueueSize << " status " << (*it).m_rlcStatusPduSize << " decrease " << size);
// Update queues: RLC tx order Status, ReTx, Tx
// Update status queue
if (((*it).m_rlcStatusPduSize > 0) && (size >= (*it).m_rlcStatusPduSize))
{
(*it).m_rlcStatusPduSize = 0;
}
else if (((*it).m_rlcRetransmissionQueueSize > 0) && (size >= (*it).m_rlcRetransmissionQueueSize))
{
(*it).m_rlcRetransmissionQueueSize = 0;
}
else if ((*it).m_rlcTransmissionQueueSize > 0)
{
// update transmission queue
if ((*it).m_rlcTransmissionQueueSize <= size)
{
(*it).m_rlcTransmissionQueueSize = 0;
}
else
{
size -= 2; // remove minimun RLC overhead due to header
(*it).m_rlcTransmissionQueueSize -= size;
}
}
return;
}
}
}
void
RrFfMacScheduler::UpdateUlRlcBufferInfo (uint16_t rnti, uint16_t size)
{
size = size - 2; // remove the minimum RLC overhead
std::map <uint16_t,uint32_t>::iterator it = m_ceBsrRxed.find (rnti);
if (it != m_ceBsrRxed.end ())
{
NS_LOG_INFO (this << " Update RLC BSR UE " << rnti << " size " << size << " BSR " << (*it).second);
if ((*it).second >= size)
{
(*it).second -= size;
}
else
{
(*it).second = 0;
}
}
else
{
NS_LOG_ERROR (this << " Does not find BSR report info of UE " << rnti);
}
}
void
RrFfMacScheduler::TransmissionModeConfigurationUpdate (uint16_t rnti, uint8_t txMode)
{
NS_LOG_FUNCTION (this << " RNTI " << rnti << " txMode " << (uint16_t)txMode);
FfMacCschedSapUser::CschedUeConfigUpdateIndParameters params;
params.m_rnti = rnti;
params.m_transmissionMode = txMode;
m_cschedSapUser->CschedUeConfigUpdateInd (params);
}
}