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fdtbfq-ff-mac-scheduler.cc
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fdtbfq-ff-mac-scheduler.cc
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/* -*- 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>
* Modification: Dizhi Zhou <dizhi.zhou@gmail.com> // modify codes related to downlink scheduler
*/
#include <ns3/log.h>
#include <ns3/pointer.h>
#include <ns3/math.h>
#include <ns3/simulator.h>
#include <ns3/lte-amc.h>
#include <ns3/fdtbfq-ff-mac-scheduler.h>
#include <ns3/lte-vendor-specific-parameters.h>
#include <ns3/boolean.h>
#include <ns3/integer.h>
#include <set>
#include <cfloat>
namespace ns3 {
NS_LOG_COMPONENT_DEFINE ("FdTbfqFfMacScheduler");
static const int FdTbfqType0AllocationRbg[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 (FdTbfqFfMacScheduler);
class FdTbfqSchedulerMemberCschedSapProvider : public FfMacCschedSapProvider
{
public:
FdTbfqSchedulerMemberCschedSapProvider (FdTbfqFfMacScheduler* 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:
FdTbfqSchedulerMemberCschedSapProvider ();
FdTbfqFfMacScheduler* m_scheduler;
};
FdTbfqSchedulerMemberCschedSapProvider::FdTbfqSchedulerMemberCschedSapProvider ()
{
}
FdTbfqSchedulerMemberCschedSapProvider::FdTbfqSchedulerMemberCschedSapProvider (FdTbfqFfMacScheduler* scheduler) : m_scheduler (scheduler)
{
}
void
FdTbfqSchedulerMemberCschedSapProvider::CschedCellConfigReq (const struct CschedCellConfigReqParameters& params)
{
m_scheduler->DoCschedCellConfigReq (params);
}
void
FdTbfqSchedulerMemberCschedSapProvider::CschedUeConfigReq (const struct CschedUeConfigReqParameters& params)
{
m_scheduler->DoCschedUeConfigReq (params);
}
void
FdTbfqSchedulerMemberCschedSapProvider::CschedLcConfigReq (const struct CschedLcConfigReqParameters& params)
{
m_scheduler->DoCschedLcConfigReq (params);
}
void
FdTbfqSchedulerMemberCschedSapProvider::CschedLcReleaseReq (const struct CschedLcReleaseReqParameters& params)
{
m_scheduler->DoCschedLcReleaseReq (params);
}
void
FdTbfqSchedulerMemberCschedSapProvider::CschedUeReleaseReq (const struct CschedUeReleaseReqParameters& params)
{
m_scheduler->DoCschedUeReleaseReq (params);
}
class FdTbfqSchedulerMemberSchedSapProvider : public FfMacSchedSapProvider
{
public:
FdTbfqSchedulerMemberSchedSapProvider (FdTbfqFfMacScheduler* 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:
FdTbfqSchedulerMemberSchedSapProvider ();
FdTbfqFfMacScheduler* m_scheduler;
};
FdTbfqSchedulerMemberSchedSapProvider::FdTbfqSchedulerMemberSchedSapProvider ()
{
}
FdTbfqSchedulerMemberSchedSapProvider::FdTbfqSchedulerMemberSchedSapProvider (FdTbfqFfMacScheduler* scheduler)
: m_scheduler (scheduler)
{
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedDlRlcBufferReq (const struct SchedDlRlcBufferReqParameters& params)
{
m_scheduler->DoSchedDlRlcBufferReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedDlPagingBufferReq (const struct SchedDlPagingBufferReqParameters& params)
{
m_scheduler->DoSchedDlPagingBufferReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedDlMacBufferReq (const struct SchedDlMacBufferReqParameters& params)
{
m_scheduler->DoSchedDlMacBufferReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedDlTriggerReq (const struct SchedDlTriggerReqParameters& params)
{
m_scheduler->DoSchedDlTriggerReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedDlRachInfoReq (const struct SchedDlRachInfoReqParameters& params)
{
m_scheduler->DoSchedDlRachInfoReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedDlCqiInfoReq (const struct SchedDlCqiInfoReqParameters& params)
{
m_scheduler->DoSchedDlCqiInfoReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedUlTriggerReq (const struct SchedUlTriggerReqParameters& params)
{
m_scheduler->DoSchedUlTriggerReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedUlNoiseInterferenceReq (const struct SchedUlNoiseInterferenceReqParameters& params)
{
m_scheduler->DoSchedUlNoiseInterferenceReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedUlSrInfoReq (const struct SchedUlSrInfoReqParameters& params)
{
m_scheduler->DoSchedUlSrInfoReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedUlMacCtrlInfoReq (const struct SchedUlMacCtrlInfoReqParameters& params)
{
m_scheduler->DoSchedUlMacCtrlInfoReq (params);
}
void
FdTbfqSchedulerMemberSchedSapProvider::SchedUlCqiInfoReq (const struct SchedUlCqiInfoReqParameters& params)
{
m_scheduler->DoSchedUlCqiInfoReq (params);
}
FdTbfqFfMacScheduler::FdTbfqFfMacScheduler ()
: m_cschedSapUser (0),
m_schedSapUser (0),
m_nextRntiUl (0),
bankSize (0)
{
m_amc = CreateObject <LteAmc> ();
m_cschedSapProvider = new FdTbfqSchedulerMemberCschedSapProvider (this);
m_schedSapProvider = new FdTbfqSchedulerMemberSchedSapProvider (this);
m_ffrSapProvider = 0;
m_ffrSapUser = new MemberLteFfrSapUser<FdTbfqFfMacScheduler> (this);
}
FdTbfqFfMacScheduler::~FdTbfqFfMacScheduler ()
{
NS_LOG_FUNCTION (this);
}
void
FdTbfqFfMacScheduler::DoDispose ()
{
NS_LOG_FUNCTION (this);
m_dlHarqProcessesDciBuffer.clear ();
m_dlHarqProcessesTimer.clear ();
m_dlHarqProcessesRlcPduListBuffer.clear ();
m_dlInfoListBuffered.clear ();
m_ulHarqCurrentProcessId.clear ();
m_ulHarqProcessesStatus.clear ();
m_ulHarqProcessesDciBuffer.clear ();
delete m_cschedSapProvider;
delete m_schedSapProvider;
delete m_ffrSapUser;
}
TypeId
FdTbfqFfMacScheduler::GetTypeId (void)
{
static TypeId tid = TypeId ("ns3::FdTbfqFfMacScheduler")
.SetParent<FfMacScheduler> ()
.SetGroupName("Lte")
.AddConstructor<FdTbfqFfMacScheduler> ()
.AddAttribute ("CqiTimerThreshold",
"The number of TTIs a CQI is valid (default 1000 - 1 sec.)",
UintegerValue (1000),
MakeUintegerAccessor (&FdTbfqFfMacScheduler::m_cqiTimersThreshold),
MakeUintegerChecker<uint32_t> ())
.AddAttribute ("DebtLimit",
"Flow debt limit (default -625000 bytes)",
IntegerValue (-625000),
MakeIntegerAccessor (&FdTbfqFfMacScheduler::m_debtLimit),
MakeIntegerChecker<int> ())
.AddAttribute ("CreditLimit",
"Flow credit limit (default 625000 bytes)",
UintegerValue (625000),
MakeUintegerAccessor (&FdTbfqFfMacScheduler::m_creditLimit),
MakeUintegerChecker<uint32_t> ())
.AddAttribute ("TokenPoolSize",
"The maximum value of flow token pool (default 1 bytes)",
UintegerValue (1),
MakeUintegerAccessor (&FdTbfqFfMacScheduler::m_tokenPoolSize),
MakeUintegerChecker<uint32_t> ())
.AddAttribute ("CreditableThreshold",
"Threshold of flow credit (default 0 bytes)",
UintegerValue (0),
MakeUintegerAccessor (&FdTbfqFfMacScheduler::m_creditableThreshold),
MakeUintegerChecker<uint32_t> ())
.AddAttribute ("HarqEnabled",
"Activate/Deactivate the HARQ [by default is active].",
BooleanValue (true),
MakeBooleanAccessor (&FdTbfqFfMacScheduler::m_harqOn),
MakeBooleanChecker ())
.AddAttribute ("UlGrantMcs",
"The MCS of the UL grant, must be [0..15] (default 0)",
UintegerValue (0),
MakeUintegerAccessor (&FdTbfqFfMacScheduler::m_ulGrantMcs),
MakeUintegerChecker<uint8_t> ())
;
return tid;
}
void
FdTbfqFfMacScheduler::SetFfMacCschedSapUser (FfMacCschedSapUser* s)
{
m_cschedSapUser = s;
}
void
FdTbfqFfMacScheduler::SetFfMacSchedSapUser (FfMacSchedSapUser* s)
{
m_schedSapUser = s;
}
FfMacCschedSapProvider*
FdTbfqFfMacScheduler::GetFfMacCschedSapProvider ()
{
return m_cschedSapProvider;
}
FfMacSchedSapProvider*
FdTbfqFfMacScheduler::GetFfMacSchedSapProvider ()
{
return m_schedSapProvider;
}
void
FdTbfqFfMacScheduler::SetLteFfrSapProvider (LteFfrSapProvider* s)
{
m_ffrSapProvider = s;
}
LteFfrSapUser*
FdTbfqFfMacScheduler::GetLteFfrSapUser ()
{
return m_ffrSapUser;
}
void
FdTbfqFfMacScheduler::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
FdTbfqFfMacScheduler::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));
DlHarqProcessesTimer_t dlHarqProcessesTimer;
dlHarqProcessesTimer.resize (8,0);
m_dlHarqProcessesTimer.insert (std::pair <uint16_t, DlHarqProcessesTimer_t> (params.m_rnti, dlHarqProcessesTimer));
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
FdTbfqFfMacScheduler::DoCschedLcConfigReq (const struct FfMacCschedSapProvider::CschedLcConfigReqParameters& params)
{
NS_LOG_FUNCTION (this << " New LC, rnti: " << params.m_rnti);
std::map <uint16_t, fdtbfqsFlowPerf_t>::iterator it;
for (uint16_t i = 0; i < params.m_logicalChannelConfigList.size (); i++)
{
it = m_flowStatsDl.find (params.m_rnti);
if (it == m_flowStatsDl.end ())
{
uint64_t mbrDlInBytes = params.m_logicalChannelConfigList.at (i).m_eRabMaximulBitrateDl / 8; // byte/s
uint64_t mbrUlInBytes = params.m_logicalChannelConfigList.at (i).m_eRabMaximulBitrateUl / 8; // byte/s
fdtbfqsFlowPerf_t flowStatsDl;
flowStatsDl.flowStart = Simulator::Now ();
flowStatsDl.packetArrivalRate = 0;
flowStatsDl.tokenGenerationRate = mbrDlInBytes;
flowStatsDl.tokenPoolSize = 0;
flowStatsDl.maxTokenPoolSize = m_tokenPoolSize;
flowStatsDl.counter = 0;
flowStatsDl.burstCredit = m_creditLimit; // bytes
flowStatsDl.debtLimit = m_debtLimit; // bytes
flowStatsDl.creditableThreshold = m_creditableThreshold;
m_flowStatsDl.insert (std::pair<uint16_t, fdtbfqsFlowPerf_t> (params.m_rnti, flowStatsDl));
fdtbfqsFlowPerf_t flowStatsUl;
flowStatsUl.flowStart = Simulator::Now ();
flowStatsUl.packetArrivalRate = 0;
flowStatsUl.tokenGenerationRate = mbrUlInBytes;
flowStatsUl.tokenPoolSize = 0;
flowStatsUl.maxTokenPoolSize = m_tokenPoolSize;
flowStatsUl.counter = 0;
flowStatsUl.burstCredit = m_creditLimit; // bytes
flowStatsUl.debtLimit = m_debtLimit; // bytes
flowStatsUl.creditableThreshold = m_creditableThreshold;
m_flowStatsUl.insert (std::pair<uint16_t, fdtbfqsFlowPerf_t> (params.m_rnti, flowStatsUl));
}
else
{
// update MBR and GBR from UeManager::SetupDataRadioBearer ()
uint64_t mbrDlInBytes = params.m_logicalChannelConfigList.at (i).m_eRabMaximulBitrateDl / 8; // byte/s
uint64_t mbrUlInBytes = params.m_logicalChannelConfigList.at (i).m_eRabMaximulBitrateUl / 8; // byte/s
m_flowStatsDl[(*it).first].tokenGenerationRate = mbrDlInBytes;
m_flowStatsUl[(*it).first].tokenGenerationRate = mbrUlInBytes;
}
}
return;
}
void
FdTbfqFfMacScheduler::DoCschedLcReleaseReq (const struct FfMacCschedSapProvider::CschedLcReleaseReqParameters& params)
{
NS_LOG_FUNCTION (this);
for (uint16_t i = 0; i < params.m_logicalChannelIdentity.size (); i++)
{
std::map<LteFlowId_t, FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator it = m_rlcBufferReq.begin ();
std::map<LteFlowId_t, FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator temp;
while (it!=m_rlcBufferReq.end ())
{
if (((*it).first.m_rnti == params.m_rnti) && ((*it).first.m_lcId == params.m_logicalChannelIdentity.at (i)))
{
temp = it;
it++;
m_rlcBufferReq.erase (temp);
}
else
{
it++;
}
}
}
return;
}
void
FdTbfqFfMacScheduler::DoCschedUeReleaseReq (const struct FfMacCschedSapProvider::CschedUeReleaseReqParameters& params)
{
NS_LOG_FUNCTION (this);
m_uesTxMode.erase (params.m_rnti);
m_dlHarqCurrentProcessId.erase (params.m_rnti);
m_dlHarqProcessesStatus.erase (params.m_rnti);
m_dlHarqProcessesTimer.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_flowStatsDl.erase (params.m_rnti);
m_flowStatsUl.erase (params.m_rnti);
m_ceBsrRxed.erase (params.m_rnti);
std::map<LteFlowId_t, FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator it = m_rlcBufferReq.begin ();
std::map<LteFlowId_t, FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator temp;
while (it!=m_rlcBufferReq.end ())
{
if ((*it).first.m_rnti == params.m_rnti)
{
temp = it;
it++;
m_rlcBufferReq.erase (temp);
}
else
{
it++;
}
}
if (m_nextRntiUl == params.m_rnti)
{
m_nextRntiUl = 0;
}
return;
}
void
FdTbfqFfMacScheduler::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::map <LteFlowId_t, FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator it;
LteFlowId_t flow (params.m_rnti, params.m_logicalChannelIdentity);
it = m_rlcBufferReq.find (flow);
if (it == m_rlcBufferReq.end ())
{
m_rlcBufferReq.insert (std::pair <LteFlowId_t, FfMacSchedSapProvider::SchedDlRlcBufferReqParameters> (flow, params));
}
else
{
(*it).second = params;
}
return;
}
void
FdTbfqFfMacScheduler::DoSchedDlPagingBufferReq (const struct FfMacSchedSapProvider::SchedDlPagingBufferReqParameters& params)
{
NS_LOG_FUNCTION (this);
NS_FATAL_ERROR ("method not implemented");
return;
}
void
FdTbfqFfMacScheduler::DoSchedDlMacBufferReq (const struct FfMacSchedSapProvider::SchedDlMacBufferReqParameters& params)
{
NS_LOG_FUNCTION (this);
NS_FATAL_ERROR ("method not implemented");
return;
}
int
FdTbfqFfMacScheduler::GetRbgSize (int dlbandwidth)
{
for (int i = 0; i < 4; i++)
{
if (dlbandwidth < FdTbfqType0AllocationRbg[i])
{
return (i + 1);
}
}
return (-1);
}
int
FdTbfqFfMacScheduler::LcActivePerFlow (uint16_t rnti)
{
std::map <LteFlowId_t, FfMacSchedSapProvider::SchedDlRlcBufferReqParameters>::iterator it;
int lcActive = 0;
for (it = m_rlcBufferReq.begin (); it != m_rlcBufferReq.end (); it++)
{
if (((*it).first.m_rnti == rnti) && (((*it).second.m_rlcTransmissionQueueSize > 0)
|| ((*it).second.m_rlcRetransmissionQueueSize > 0)
|| ((*it).second.m_rlcStatusPduSize > 0) ))
{
lcActive++;
}
if ((*it).first.m_rnti > rnti)
{
break;
}
}
return (lcActive);
}
uint8_t
FdTbfqFfMacScheduler::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
FdTbfqFfMacScheduler::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
{
NS_FATAL_ERROR ("No HARQ process available for RNTI " << rnti << " check before update with HarqProcessAvailability");
}
return ((*it).second);
}
void
FdTbfqFfMacScheduler::RefreshHarqProcesses ()
{
NS_LOG_FUNCTION (this);
std::map <uint16_t, DlHarqProcessesTimer_t>::iterator itTimers;
for (itTimers = m_dlHarqProcessesTimer.begin (); itTimers != m_dlHarqProcessesTimer.end (); itTimers ++)
{
for (uint16_t i = 0; i < HARQ_PROC_NUM; i++)
{
if ((*itTimers).second.at (i) == HARQ_DL_TIMEOUT)
{
// reset HARQ process
NS_LOG_DEBUG (this << " Reset HARQ proc " << i << " for RNTI " << (*itTimers).first);
std::map <uint16_t, DlHarqProcessesStatus_t>::iterator itStat = m_dlHarqProcessesStatus.find ((*itTimers).first);
if (itStat == m_dlHarqProcessesStatus.end ())
{
NS_FATAL_ERROR ("No Process Id Status found for this RNTI " << (*itTimers).first);
}
(*itStat).second.at (i) = 0;
(*itTimers).second.at (i) = 0;
}
else
{
(*itTimers).second.at (i)++;
}
}
}
}
void
FdTbfqFfMacScheduler::DoSchedDlTriggerReq (const struct FfMacSchedSapProvider::SchedDlTriggerReqParameters& params)
{
NS_LOG_FUNCTION (this << " Frame no. " << (params.m_sfnSf >> 4) << " subframe no. " << (0xF & params.m_sfnSf));
// API generated by RLC for triggering the scheduling of a DL subframe
// evaluate the relative channel quality indicator for each UE per each RBG
// (since we are using allocation type 0 the small unit of allocation is RBG)
// Resource allocation type 0 (see sec 7.1.6.1 of 36.213)
RefreshDlCqiMaps ();
int rbgSize = GetRbgSize (m_cschedCellConfig.m_dlBandwidth);
int rbgNum = m_cschedCellConfig.m_dlBandwidth / rbgSize;
std::map <uint16_t, std::vector <uint16_t> > allocationMap; // RBs map per RNTI
std::vector <bool> rbgMap; // global RBGs map
uint16_t rbgAllocatedNum = 0;
std::set <uint16_t> rntiAllocated;
rbgMap.resize (m_cschedCellConfig.m_dlBandwidth / rbgSize, false);
rbgMap = m_ffrSapProvider->GetAvailableDlRbg ();
for (std::vector<bool>::iterator it = rbgMap.begin (); it != rbgMap.end (); it++)
{
if ((*it) == true )
{
rbgAllocatedNum++;
}
}
FfMacSchedSapUser::SchedDlConfigIndParameters ret;
// 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;
}
// RACH Allocation
uint16_t rbAllocatedNum = 0;
std::vector <bool> ulRbMap;
ulRbMap.resize (m_cschedCellConfig.m_ulBandwidth, false);
ulRbMap = m_ffrSapProvider->GetAvailableUlRbg ();
uint8_t maxContinuousUlBandwidth = 0;
uint8_t tmpMinBandwidth = 0;
uint16_t ffrRbStartOffset = 0;
uint16_t tmpFfrRbStartOffset = 0;
uint16_t index = 0;
for (std::vector<bool>::iterator it = ulRbMap.begin (); it != ulRbMap.end (); it++)
{
if ((*it) == true )
{
rbAllocatedNum++;
if (tmpMinBandwidth > maxContinuousUlBandwidth)
{
maxContinuousUlBandwidth = tmpMinBandwidth;
ffrRbStartOffset = tmpFfrRbStartOffset;
}
tmpMinBandwidth = 0;
}
else
{
if (tmpMinBandwidth == 0)
{
tmpFfrRbStartOffset = index;
}
tmpMinBandwidth++;
}
index++;
}
if (tmpMinBandwidth > maxContinuousUlBandwidth)
{
maxContinuousUlBandwidth = tmpMinBandwidth;
ffrRbStartOffset = tmpFfrRbStartOffset;
}
m_rachAllocationMap.resize (m_cschedCellConfig.m_ulBandwidth, 0);
uint16_t rbStart = 0;
rbStart = ffrRbStartOffset;
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 < (ffrRbStartOffset + maxContinuousUlBandwidth)))
{
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 " << m_ulGrantMcs << " tbSize " << newRar.m_grant.m_tbSize);
for (uint16_t i = rbStart; i < rbStart + rbLen; i++)
{
m_rachAllocationMap.at (i) = (*itRach).m_rnti;
}
if (m_harqOn == true)
{
// generate UL-DCI for HARQ retransmissions
UlDciListElement_s uldci;
uldci.m_rnti = newRar.m_rnti;
uldci.m_rbLen = rbLen;
uldci.m_rbStart = rbStart;
uldci.m_mcs = m_ulGrantMcs;
uldci.m_tbSize = tbSizeBits / 8;
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
uint8_t harqId = 0;
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;
}
rbStart = rbStart + rbLen;
ret.m_buildRarList.push_back (newRar);
}
m_rachList.clear ();
// Process DL HARQ feedback
RefreshHarqProcesses ();
// 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 (uint16_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 ("Maximum 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 = (rbgId + 1) % rbgNum;
}
if (j == dciRbg.size ())
{
// find new RBGs -> update DCI map
uint32_t rbgMask = 0;
for (uint16_t k = 0; k < dciRbg.size (); k++)