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lte-enb-rrc.cc
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lte-enb-rrc.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
*
* Authors: Nicola Baldo <nbaldo@cttc.es>
* Marco Miozzo <mmiozzo@cttc.es>
* Manuel Requena <manuel.requena@cttc.es>
*/
#include "lte-enb-rrc.h"
#include <ns3/fatal-error.h>
#include <ns3/log.h>
#include <ns3/abort.h>
#include <ns3/pointer.h>
#include <ns3/object-map.h>
#include <ns3/object-factory.h>
#include <ns3/simulator.h>
#include <ns3/lte-radio-bearer-info.h>
#include <ns3/eps-bearer-tag.h>
#include <ns3/packet.h>
#include <ns3/lte-rlc.h>
#include <ns3/lte-rlc-tm.h>
#include <ns3/lte-rlc-um.h>
#include <ns3/lte-rlc-am.h>
#include <ns3/lte-pdcp.h>
namespace ns3 {
NS_LOG_COMPONENT_DEFINE ("LteEnbRrc");
///////////////////////////////////////////
// CMAC SAP forwarder
///////////////////////////////////////////
/**
* \brief Class for forwarding CMAC SAP User functions.
*/
class EnbRrcMemberLteEnbCmacSapUser : public LteEnbCmacSapUser
{
public:
EnbRrcMemberLteEnbCmacSapUser (LteEnbRrc* rrc);
virtual uint16_t AllocateTemporaryCellRnti ();
virtual void NotifyLcConfigResult (uint16_t rnti, uint8_t lcid, bool success);
virtual void RrcConfigurationUpdateInd (UeConfig params);
private:
LteEnbRrc* m_rrc;
};
EnbRrcMemberLteEnbCmacSapUser::EnbRrcMemberLteEnbCmacSapUser (LteEnbRrc* rrc)
: m_rrc (rrc)
{
}
uint16_t
EnbRrcMemberLteEnbCmacSapUser::AllocateTemporaryCellRnti ()
{
return m_rrc->DoAllocateTemporaryCellRnti ();
}
void
EnbRrcMemberLteEnbCmacSapUser::NotifyLcConfigResult (uint16_t rnti, uint8_t lcid, bool success)
{
m_rrc->DoNotifyLcConfigResult (rnti, lcid, success);
}
void
EnbRrcMemberLteEnbCmacSapUser::RrcConfigurationUpdateInd (UeConfig params)
{
m_rrc->DoRrcConfigurationUpdateInd (params);
}
///////////////////////////////////////////
// UeManager
///////////////////////////////////////////
/// Map each of UE Manager states to its string representation.
static const std::string g_ueManagerStateName[UeManager::NUM_STATES] =
{
"INITIAL_RANDOM_ACCESS",
"CONNECTION_SETUP",
"CONNECTION_REJECTED",
"CONNECTED_NORMALLY",
"CONNECTION_RECONFIGURATION",
"CONNECTION_REESTABLISHMENT",
"HANDOVER_PREPARATION",
"HANDOVER_JOINING",
"HANDOVER_PATH_SWITCH",
"HANDOVER_LEAVING",
};
/**
* \param s The UE manager state.
* \return The string representation of the given state.
*/
static const std::string & ToString (UeManager::State s)
{
return g_ueManagerStateName[s];
}
NS_OBJECT_ENSURE_REGISTERED (UeManager);
UeManager::UeManager ()
{
NS_FATAL_ERROR ("this constructor is not espected to be used");
}
UeManager::UeManager (Ptr<LteEnbRrc> rrc, uint16_t rnti, State s)
: m_lastAllocatedDrbid (0),
m_rnti (rnti),
m_imsi (0),
m_lastRrcTransactionIdentifier (0),
m_rrc (rrc),
m_state (s),
m_pendingRrcConnectionReconfiguration (false),
m_sourceX2apId (0),
m_sourceCellId (0),
m_needPhyMacConfiguration (false)
{
NS_LOG_FUNCTION (this);
}
void
UeManager::DoInitialize ()
{
NS_LOG_FUNCTION (this);
m_drbPdcpSapUser = new LtePdcpSpecificLtePdcpSapUser<UeManager> (this);
m_physicalConfigDedicated.haveAntennaInfoDedicated = true;
m_physicalConfigDedicated.antennaInfo.transmissionMode = m_rrc->m_defaultTransmissionMode;
m_physicalConfigDedicated.haveSoundingRsUlConfigDedicated = true;
m_physicalConfigDedicated.soundingRsUlConfigDedicated.srsConfigIndex = m_rrc->GetNewSrsConfigurationIndex ();
m_physicalConfigDedicated.soundingRsUlConfigDedicated.type = LteRrcSap::SoundingRsUlConfigDedicated::SETUP;
m_physicalConfigDedicated.soundingRsUlConfigDedicated.srsBandwidth = 0;
m_physicalConfigDedicated.havePdschConfigDedicated = true;
m_physicalConfigDedicated.pdschConfigDedicated.pa = LteRrcSap::PdschConfigDedicated::dB0;
m_rrc->m_cmacSapProvider->AddUe (m_rnti);
m_rrc->m_cphySapProvider->AddUe (m_rnti);
// setup the eNB side of SRB0
{
uint8_t lcid = 0;
Ptr<LteRlc> rlc = CreateObject<LteRlcTm> ()->GetObject<LteRlc> ();
rlc->SetLteMacSapProvider (m_rrc->m_macSapProvider);
rlc->SetRnti (m_rnti);
rlc->SetLcId (lcid);
m_srb0 = CreateObject<LteSignalingRadioBearerInfo> ();
m_srb0->m_rlc = rlc;
m_srb0->m_srbIdentity = 0;
// no need to store logicalChannelConfig as SRB0 is pre-configured
LteEnbCmacSapProvider::LcInfo lcinfo;
lcinfo.rnti = m_rnti;
lcinfo.lcId = lcid;
// leave the rest of lcinfo empty as CCCH (LCID 0) is pre-configured
m_rrc->m_cmacSapProvider->AddLc (lcinfo, rlc->GetLteMacSapUser ());
}
// setup the eNB side of SRB1; the UE side will be set up upon RRC connection establishment
{
uint8_t lcid = 1;
Ptr<LteRlc> rlc = CreateObject<LteRlcAm> ()->GetObject<LteRlc> ();
rlc->SetLteMacSapProvider (m_rrc->m_macSapProvider);
rlc->SetRnti (m_rnti);
rlc->SetLcId (lcid);
Ptr<LtePdcp> pdcp = CreateObject<LtePdcp> ();
pdcp->SetRnti (m_rnti);
pdcp->SetLcId (lcid);
pdcp->SetLtePdcpSapUser (m_drbPdcpSapUser);
pdcp->SetLteRlcSapProvider (rlc->GetLteRlcSapProvider ());
rlc->SetLteRlcSapUser (pdcp->GetLteRlcSapUser ());
m_srb1 = CreateObject<LteSignalingRadioBearerInfo> ();
m_srb1->m_rlc = rlc;
m_srb1->m_pdcp = pdcp;
m_srb1->m_srbIdentity = 1;
m_srb1->m_logicalChannelConfig.priority = 0;
m_srb1->m_logicalChannelConfig.prioritizedBitRateKbps = 100;
m_srb1->m_logicalChannelConfig.bucketSizeDurationMs = 100;
m_srb1->m_logicalChannelConfig.logicalChannelGroup = 0;
LteEnbCmacSapProvider::LcInfo lcinfo;
lcinfo.rnti = m_rnti;
lcinfo.lcId = lcid;
lcinfo.lcGroup = 0; // all SRBs always mapped to LCG 0
lcinfo.qci = EpsBearer::GBR_CONV_VOICE; // not sure why the FF API requires a CQI even for SRBs...
lcinfo.isGbr = true;
lcinfo.mbrUl = 1e6;
lcinfo.mbrDl = 1e6;
lcinfo.gbrUl = 1e4;
lcinfo.gbrDl = 1e4;
m_rrc->m_cmacSapProvider->AddLc (lcinfo, rlc->GetLteMacSapUser ());
}
LteEnbRrcSapUser::SetupUeParameters ueParams;
ueParams.srb0SapProvider = m_srb0->m_rlc->GetLteRlcSapProvider ();
ueParams.srb1SapProvider = m_srb1->m_pdcp->GetLtePdcpSapProvider ();
m_rrc->m_rrcSapUser->SetupUe (m_rnti, ueParams);
// configure MAC (and scheduler)
LteEnbCmacSapProvider::UeConfig req;
req.m_rnti = m_rnti;
req.m_transmissionMode = m_physicalConfigDedicated.antennaInfo.transmissionMode;
m_rrc->m_cmacSapProvider->UeUpdateConfigurationReq (req);
// configure PHY
m_rrc->m_cphySapProvider->SetTransmissionMode (m_rnti, m_physicalConfigDedicated.antennaInfo.transmissionMode);
m_rrc->m_cphySapProvider->SetSrsConfigurationIndex (m_rnti, m_physicalConfigDedicated.soundingRsUlConfigDedicated.srsConfigIndex);
// schedule this UeManager instance to be deleted if the UE does not give any sign of life within a reasonable time
Time maxConnectionDelay;
switch (m_state)
{
case INITIAL_RANDOM_ACCESS:
m_connectionRequestTimeout = Simulator::Schedule (m_rrc->m_connectionRequestTimeoutDuration,
&LteEnbRrc::ConnectionRequestTimeout,
m_rrc, m_rnti);
break;
case HANDOVER_JOINING:
m_handoverJoiningTimeout = Simulator::Schedule (m_rrc->m_handoverJoiningTimeoutDuration,
&LteEnbRrc::HandoverJoiningTimeout,
m_rrc, m_rnti);
break;
default:
NS_FATAL_ERROR ("unexpected state " << ToString (m_state));
break;
}
}
UeManager::~UeManager (void)
{
}
void
UeManager::DoDispose ()
{
delete m_drbPdcpSapUser;
// delete eventual X2-U TEIDs
for (std::map <uint8_t, Ptr<LteDataRadioBearerInfo> >::iterator it = m_drbMap.begin ();
it != m_drbMap.end ();
++it)
{
m_rrc->m_x2uTeidInfoMap.erase (it->second->m_gtpTeid);
}
}
TypeId UeManager::GetTypeId (void)
{
static TypeId tid = TypeId ("ns3::UeManager")
.SetParent<Object> ()
.AddConstructor<UeManager> ()
.AddAttribute ("DataRadioBearerMap", "List of UE DataRadioBearerInfo by DRBID.",
ObjectMapValue (),
MakeObjectMapAccessor (&UeManager::m_drbMap),
MakeObjectMapChecker<LteDataRadioBearerInfo> ())
.AddAttribute ("Srb0", "SignalingRadioBearerInfo for SRB0",
PointerValue (),
MakePointerAccessor (&UeManager::m_srb0),
MakePointerChecker<LteSignalingRadioBearerInfo> ())
.AddAttribute ("Srb1", "SignalingRadioBearerInfo for SRB1",
PointerValue (),
MakePointerAccessor (&UeManager::m_srb1),
MakePointerChecker<LteSignalingRadioBearerInfo> ())
.AddAttribute ("C-RNTI",
"Cell Radio Network Temporary Identifier",
TypeId::ATTR_GET, // read-only attribute
UintegerValue (0), // unused, read-only attribute
MakeUintegerAccessor (&UeManager::m_rnti),
MakeUintegerChecker<uint16_t> ())
.AddTraceSource ("StateTransition",
"fired upon every UE state transition seen by the "
"UeManager at the eNB RRC",
MakeTraceSourceAccessor (&UeManager::m_stateTransitionTrace),
"ns3::UeManager::StateTracedCallback")
;
return tid;
}
void
UeManager::SetSource (uint16_t sourceCellId, uint16_t sourceX2apId)
{
m_sourceX2apId = sourceX2apId;
m_sourceCellId = sourceCellId;
}
void
UeManager::SetImsi (uint64_t imsi)
{
m_imsi = imsi;
}
void
UeManager::SetupDataRadioBearer (EpsBearer bearer, uint8_t bearerId, uint32_t gtpTeid, Ipv4Address transportLayerAddress)
{
NS_LOG_FUNCTION (this << (uint32_t) m_rnti);
Ptr<LteDataRadioBearerInfo> drbInfo = CreateObject<LteDataRadioBearerInfo> ();
uint8_t drbid = AddDataRadioBearerInfo (drbInfo);
uint8_t lcid = Drbid2Lcid (drbid);
uint8_t bid = Drbid2Bid (drbid);
NS_ASSERT_MSG ( bearerId == 0 || bid == bearerId, "bearer ID mismatch (" << (uint32_t) bid << " != " << (uint32_t) bearerId << ", the assumption that ID are allocated in the same way by MME and RRC is not valid any more");
drbInfo->m_epsBearerIdentity = bid;
drbInfo->m_drbIdentity = drbid;
drbInfo->m_logicalChannelIdentity = lcid;
drbInfo->m_gtpTeid = gtpTeid;
drbInfo->m_transportLayerAddress = transportLayerAddress;
if (m_state == HANDOVER_JOINING)
{
// setup TEIDs for receiving data eventually forwarded over X2-U
LteEnbRrc::X2uTeidInfo x2uTeidInfo;
x2uTeidInfo.rnti = m_rnti;
x2uTeidInfo.drbid = drbid;
std::pair<std::map<uint32_t, LteEnbRrc::X2uTeidInfo>::iterator, bool>
ret = m_rrc->m_x2uTeidInfoMap.insert (std::pair<uint32_t, LteEnbRrc::X2uTeidInfo> (gtpTeid, x2uTeidInfo));
NS_ASSERT_MSG (ret.second == true, "overwriting a pre-existing entry in m_x2uTeidInfoMap");
}
TypeId rlcTypeId = m_rrc->GetRlcType (bearer);
ObjectFactory rlcObjectFactory;
rlcObjectFactory.SetTypeId (rlcTypeId);
Ptr<LteRlc> rlc = rlcObjectFactory.Create ()->GetObject<LteRlc> ();
rlc->SetLteMacSapProvider (m_rrc->m_macSapProvider);
rlc->SetRnti (m_rnti);
drbInfo->m_rlc = rlc;
rlc->SetLcId (lcid);
// we need PDCP only for real RLC, i.e., RLC/UM or RLC/AM
// if we are using RLC/SM we don't care of anything above RLC
if (rlcTypeId != LteRlcSm::GetTypeId ())
{
Ptr<LtePdcp> pdcp = CreateObject<LtePdcp> ();
pdcp->SetRnti (m_rnti);
pdcp->SetLcId (lcid);
pdcp->SetLtePdcpSapUser (m_drbPdcpSapUser);
pdcp->SetLteRlcSapProvider (rlc->GetLteRlcSapProvider ());
rlc->SetLteRlcSapUser (pdcp->GetLteRlcSapUser ());
drbInfo->m_pdcp = pdcp;
}
LteEnbCmacSapProvider::LcInfo lcinfo;
lcinfo.rnti = m_rnti;
lcinfo.lcId = lcid;
lcinfo.lcGroup = m_rrc->GetLogicalChannelGroup (bearer);
lcinfo.qci = bearer.qci;
lcinfo.isGbr = bearer.IsGbr ();
lcinfo.mbrUl = bearer.gbrQosInfo.mbrUl;
lcinfo.mbrDl = bearer.gbrQosInfo.mbrDl;
lcinfo.gbrUl = bearer.gbrQosInfo.gbrUl;
lcinfo.gbrDl = bearer.gbrQosInfo.gbrDl;
m_rrc->m_cmacSapProvider->AddLc (lcinfo, rlc->GetLteMacSapUser ());
if (rlcTypeId == LteRlcAm::GetTypeId ())
{
drbInfo->m_rlcConfig.choice = LteRrcSap::RlcConfig::AM;
}
else
{
drbInfo->m_rlcConfig.choice = LteRrcSap::RlcConfig::UM_BI_DIRECTIONAL;
}
drbInfo->m_logicalChannelIdentity = lcid;
drbInfo->m_logicalChannelConfig.priority = m_rrc->GetLogicalChannelPriority (bearer);
drbInfo->m_logicalChannelConfig.logicalChannelGroup = m_rrc->GetLogicalChannelGroup (bearer);
if (bearer.IsGbr ())
{
drbInfo->m_logicalChannelConfig.prioritizedBitRateKbps = bearer.gbrQosInfo.gbrUl;
}
else
{
drbInfo->m_logicalChannelConfig.prioritizedBitRateKbps = 0;
}
drbInfo->m_logicalChannelConfig.bucketSizeDurationMs = 1000;
ScheduleRrcConnectionReconfiguration ();
}
void
UeManager::RecordDataRadioBearersToBeStarted ()
{
NS_LOG_FUNCTION (this << (uint32_t) m_rnti);
for (std::map <uint8_t, Ptr<LteDataRadioBearerInfo> >::iterator it = m_drbMap.begin ();
it != m_drbMap.end ();
++it)
{
m_drbsToBeStarted.push_back (it->first);
}
}
void
UeManager::StartDataRadioBearers ()
{
NS_LOG_FUNCTION (this << (uint32_t) m_rnti);
for (std::list <uint8_t>::iterator drbIdIt = m_drbsToBeStarted.begin ();
drbIdIt != m_drbsToBeStarted.end ();
++drbIdIt)
{
std::map <uint8_t, Ptr<LteDataRadioBearerInfo> >::iterator drbIt = m_drbMap.find (*drbIdIt);
NS_ASSERT (drbIt != m_drbMap.end ());
drbIt->second->m_rlc->Initialize ();
if (drbIt->second->m_pdcp)
{
drbIt->second->m_pdcp->Initialize ();
}
}
m_drbsToBeStarted.clear ();
}
void
UeManager::ReleaseDataRadioBearer (uint8_t drbid)
{
NS_LOG_FUNCTION (this << (uint32_t) m_rnti << (uint32_t) drbid);
uint8_t lcid = Drbid2Lcid (drbid);
std::map <uint8_t, Ptr<LteDataRadioBearerInfo> >::iterator it = m_drbMap.find (drbid);
NS_ASSERT_MSG (it != m_drbMap.end (), "request to remove radio bearer with unknown drbid " << drbid);
// first delete eventual X2-U TEIDs
m_rrc->m_x2uTeidInfoMap.erase (it->second->m_gtpTeid);
m_drbMap.erase (it);
m_rrc->m_cmacSapProvider->ReleaseLc (m_rnti, lcid);
LteRrcSap::RadioResourceConfigDedicated rrcd;
rrcd.havePhysicalConfigDedicated = false;
rrcd.drbToReleaseList.push_back (drbid);
//populating RadioResourceConfigDedicated information element as per 3GPP TS 36.331 version 9.2.0
rrcd.havePhysicalConfigDedicated = true;
rrcd.physicalConfigDedicated = m_physicalConfigDedicated;
//populating RRCConnectionReconfiguration message as per 3GPP TS 36.331 version 9.2.0 Release 9
LteRrcSap::RrcConnectionReconfiguration msg;
msg.haveMeasConfig = false;
msg.haveMobilityControlInfo = false;
msg.radioResourceConfigDedicated = rrcd;
msg.haveRadioResourceConfigDedicated = true;
//RRC Connection Reconfiguration towards UE
m_rrc->m_rrcSapUser->SendRrcConnectionReconfiguration (m_rnti, msg);
}
void
LteEnbRrc::DoSendReleaseDataRadioBearer (uint64_t imsi, uint16_t rnti, uint8_t bearerId)
{
Ptr<UeManager> ueManager = GetUeManager (rnti);
// Bearer de-activation towards UE
ueManager->ReleaseDataRadioBearer (bearerId);
// Bearer de-activation indication towards epc-enb application
m_s1SapProvider->DoSendReleaseIndication (imsi,rnti,bearerId);
}
void
UeManager::ScheduleRrcConnectionReconfiguration ()
{
NS_LOG_FUNCTION (this);
switch (m_state)
{
case INITIAL_RANDOM_ACCESS:
case CONNECTION_SETUP:
case CONNECTION_RECONFIGURATION:
case CONNECTION_REESTABLISHMENT:
case HANDOVER_PREPARATION:
case HANDOVER_JOINING:
case HANDOVER_LEAVING:
// a previous reconfiguration still ongoing, we need to wait for it to be finished
m_pendingRrcConnectionReconfiguration = true;
break;
case CONNECTED_NORMALLY:
{
m_pendingRrcConnectionReconfiguration = false;
LteRrcSap::RrcConnectionReconfiguration msg = BuildRrcConnectionReconfiguration ();
m_rrc->m_rrcSapUser->SendRrcConnectionReconfiguration (m_rnti, msg);
RecordDataRadioBearersToBeStarted ();
SwitchToState (CONNECTION_RECONFIGURATION);
}
break;
default:
NS_FATAL_ERROR ("method unexpected in state " << ToString (m_state));
break;
}
}
void
UeManager::PrepareHandover (uint16_t cellId)
{
NS_LOG_FUNCTION (this << cellId);
switch (m_state)
{
case CONNECTED_NORMALLY:
{
m_targetCellId = cellId;
EpcX2SapProvider::HandoverRequestParams params;
params.oldEnbUeX2apId = m_rnti;
params.cause = EpcX2SapProvider::HandoverDesirableForRadioReason;
params.sourceCellId = m_rrc->m_cellId;
params.targetCellId = cellId;
params.mmeUeS1apId = m_imsi;
params.ueAggregateMaxBitRateDownlink = 200 * 1000;
params.ueAggregateMaxBitRateUplink = 100 * 1000;
params.bearers = GetErabList ();
LteRrcSap::HandoverPreparationInfo hpi;
hpi.asConfig.sourceUeIdentity = m_rnti;
hpi.asConfig.sourceDlCarrierFreq = m_rrc->m_dlEarfcn;
hpi.asConfig.sourceMeasConfig = m_rrc->m_ueMeasConfig;
hpi.asConfig.sourceRadioResourceConfig = GetRadioResourceConfigForHandoverPreparationInfo ();
hpi.asConfig.sourceMasterInformationBlock.dlBandwidth = m_rrc->m_dlBandwidth;
hpi.asConfig.sourceMasterInformationBlock.systemFrameNumber = 0;
hpi.asConfig.sourceSystemInformationBlockType1.cellAccessRelatedInfo.plmnIdentityInfo.plmnIdentity = m_rrc->m_sib1.cellAccessRelatedInfo.plmnIdentityInfo.plmnIdentity;
hpi.asConfig.sourceSystemInformationBlockType1.cellAccessRelatedInfo.cellIdentity = m_rrc->m_cellId;
hpi.asConfig.sourceSystemInformationBlockType1.cellAccessRelatedInfo.csgIndication = m_rrc->m_sib1.cellAccessRelatedInfo.csgIndication;
hpi.asConfig.sourceSystemInformationBlockType1.cellAccessRelatedInfo.csgIdentity = m_rrc->m_sib1.cellAccessRelatedInfo.csgIdentity;
LteEnbCmacSapProvider::RachConfig rc = m_rrc->m_cmacSapProvider->GetRachConfig ();
hpi.asConfig.sourceSystemInformationBlockType2.radioResourceConfigCommon.rachConfigCommon.preambleInfo.numberOfRaPreambles = rc.numberOfRaPreambles;
hpi.asConfig.sourceSystemInformationBlockType2.radioResourceConfigCommon.rachConfigCommon.raSupervisionInfo.preambleTransMax = rc.preambleTransMax;
hpi.asConfig.sourceSystemInformationBlockType2.radioResourceConfigCommon.rachConfigCommon.raSupervisionInfo.raResponseWindowSize = rc.raResponseWindowSize;
hpi.asConfig.sourceSystemInformationBlockType2.freqInfo.ulCarrierFreq = m_rrc->m_ulEarfcn;
hpi.asConfig.sourceSystemInformationBlockType2.freqInfo.ulBandwidth = m_rrc->m_ulBandwidth;
params.rrcContext = m_rrc->m_rrcSapUser->EncodeHandoverPreparationInformation (hpi);
NS_LOG_LOGIC ("oldEnbUeX2apId = " << params.oldEnbUeX2apId);
NS_LOG_LOGIC ("sourceCellId = " << params.sourceCellId);
NS_LOG_LOGIC ("targetCellId = " << params.targetCellId);
NS_LOG_LOGIC ("mmeUeS1apId = " << params.mmeUeS1apId);
NS_LOG_LOGIC ("rrcContext = " << params.rrcContext);
m_rrc->m_x2SapProvider->SendHandoverRequest (params);
SwitchToState (HANDOVER_PREPARATION);
}
break;
default:
NS_FATAL_ERROR ("method unexpected in state " << ToString (m_state));
break;
}
}
void
UeManager::RecvHandoverRequestAck (EpcX2SapUser::HandoverRequestAckParams params)
{
NS_LOG_FUNCTION (this);
NS_ASSERT_MSG (params.notAdmittedBearers.empty (), "not admission of some bearers upon handover is not supported");
NS_ASSERT_MSG (params.admittedBearers.size () == m_drbMap.size (), "not enough bearers in admittedBearers");
// note: the Handover command from the target eNB to the source eNB
// is expected to be sent transparently to the UE; however, here we
// decode the message and eventually reencode it. This way we can
// support both a real RRC protocol implementation and an ideal one
// without actual RRC protocol encoding.
Ptr<Packet> encodedHandoverCommand = params.rrcContext;
LteRrcSap::RrcConnectionReconfiguration handoverCommand = m_rrc->m_rrcSapUser->DecodeHandoverCommand (encodedHandoverCommand);
m_rrc->m_rrcSapUser->SendRrcConnectionReconfiguration (m_rnti, handoverCommand);
SwitchToState (HANDOVER_LEAVING);
m_handoverLeavingTimeout = Simulator::Schedule (m_rrc->m_handoverLeavingTimeoutDuration,
&LteEnbRrc::HandoverLeavingTimeout,
m_rrc, m_rnti);
NS_ASSERT (handoverCommand.haveMobilityControlInfo);
m_rrc->m_handoverStartTrace (m_imsi, m_rrc->m_cellId, m_rnti, handoverCommand.mobilityControlInfo.targetPhysCellId);
EpcX2SapProvider::SnStatusTransferParams sst;
sst.oldEnbUeX2apId = params.oldEnbUeX2apId;
sst.newEnbUeX2apId = params.newEnbUeX2apId;
sst.sourceCellId = params.sourceCellId;
sst.targetCellId = params.targetCellId;
for ( std::map <uint8_t, Ptr<LteDataRadioBearerInfo> >::iterator drbIt = m_drbMap.begin ();
drbIt != m_drbMap.end ();
++drbIt)
{
// SN status transfer is only for AM RLC
if (0 != drbIt->second->m_rlc->GetObject<LteRlcAm> ())
{
LtePdcp::Status status = drbIt->second->m_pdcp->GetStatus ();
EpcX2Sap::ErabsSubjectToStatusTransferItem i;
i.dlPdcpSn = status.txSn;
i.ulPdcpSn = status.rxSn;
sst.erabsSubjectToStatusTransferList.push_back (i);
}
}
m_rrc->m_x2SapProvider->SendSnStatusTransfer (sst);
}
LteRrcSap::RadioResourceConfigDedicated
UeManager::GetRadioResourceConfigForHandoverPreparationInfo ()
{
NS_LOG_FUNCTION (this);
return BuildRadioResourceConfigDedicated ();
}
LteRrcSap::RrcConnectionReconfiguration
UeManager::GetRrcConnectionReconfigurationForHandover ()
{
NS_LOG_FUNCTION (this);
return BuildRrcConnectionReconfiguration ();
}
void
UeManager::SendData (uint8_t bid, Ptr<Packet> p)
{
NS_LOG_FUNCTION (this << p << (uint16_t) bid);
switch (m_state)
{
case INITIAL_RANDOM_ACCESS:
case CONNECTION_SETUP:
NS_LOG_WARN ("not connected, discarding packet");
return;
break;
case CONNECTED_NORMALLY:
case CONNECTION_RECONFIGURATION:
case CONNECTION_REESTABLISHMENT:
case HANDOVER_PREPARATION:
case HANDOVER_JOINING:
case HANDOVER_PATH_SWITCH:
{
NS_LOG_LOGIC ("queueing data on PDCP for transmission over the air");
LtePdcpSapProvider::TransmitPdcpSduParameters params;
params.pdcpSdu = p;
params.rnti = m_rnti;
params.lcid = Bid2Lcid (bid);
uint8_t drbid = Bid2Drbid (bid);
//Transmit PDCP sdu only if DRB ID found in drbMap
std::map<uint8_t, Ptr<LteDataRadioBearerInfo> >::iterator it = m_drbMap.find (drbid);
if (it != m_drbMap.end ())
{
Ptr<LteDataRadioBearerInfo> bearerInfo = GetDataRadioBearerInfo (drbid);
if (bearerInfo != NULL)
{
LtePdcpSapProvider* pdcpSapProvider = bearerInfo->m_pdcp->GetLtePdcpSapProvider ();
pdcpSapProvider->TransmitPdcpSdu (params);
}
}
}
break;
case HANDOVER_LEAVING:
{
NS_LOG_LOGIC ("forwarding data to target eNB over X2-U");
uint8_t drbid = Bid2Drbid (bid);
EpcX2Sap::UeDataParams params;
params.sourceCellId = m_rrc->m_cellId;
params.targetCellId = m_targetCellId;
params.gtpTeid = GetDataRadioBearerInfo (drbid)->m_gtpTeid;
params.ueData = p;
m_rrc->m_x2SapProvider->SendUeData (params);
}
break;
default:
NS_FATAL_ERROR ("method unexpected in state " << ToString (m_state));
break;
}
}
std::vector<EpcX2Sap::ErabToBeSetupItem>
UeManager::GetErabList ()
{
NS_LOG_FUNCTION (this);
std::vector<EpcX2Sap::ErabToBeSetupItem> ret;
for (std::map <uint8_t, Ptr<LteDataRadioBearerInfo> >::iterator it = m_drbMap.begin ();
it != m_drbMap.end ();
++it)
{
EpcX2Sap::ErabToBeSetupItem etbsi;
etbsi.erabId = it->second->m_epsBearerIdentity;
etbsi.erabLevelQosParameters = it->second->m_epsBearer;
etbsi.dlForwarding = false;
etbsi.transportLayerAddress = it->second->m_transportLayerAddress;
etbsi.gtpTeid = it->second->m_gtpTeid;
ret.push_back (etbsi);
}
return ret;
}
void
UeManager::SendUeContextRelease ()
{
NS_LOG_FUNCTION (this);
switch (m_state)
{
case HANDOVER_PATH_SWITCH:
NS_LOG_INFO ("Send UE CONTEXT RELEASE from target eNB to source eNB");
EpcX2SapProvider::UeContextReleaseParams ueCtxReleaseParams;
ueCtxReleaseParams.oldEnbUeX2apId = m_sourceX2apId;
ueCtxReleaseParams.newEnbUeX2apId = m_rnti;
ueCtxReleaseParams.sourceCellId = m_sourceCellId;
m_rrc->m_x2SapProvider->SendUeContextRelease (ueCtxReleaseParams);
SwitchToState (CONNECTED_NORMALLY);
m_rrc->m_handoverEndOkTrace (m_imsi, m_rrc->m_cellId, m_rnti);
break;
default:
NS_FATAL_ERROR ("method unexpected in state " << ToString (m_state));
break;
}
}
void
UeManager::RecvHandoverPreparationFailure (uint16_t cellId)
{
NS_LOG_FUNCTION (this << cellId);
switch (m_state)
{
case HANDOVER_PREPARATION:
NS_ASSERT (cellId == m_targetCellId);
NS_LOG_INFO ("target eNB sent HO preparation failure, aborting HO");
SwitchToState (CONNECTED_NORMALLY);
break;
default:
NS_FATAL_ERROR ("method unexpected in state " << ToString (m_state));
break;
}
}
void
UeManager::RecvSnStatusTransfer (EpcX2SapUser::SnStatusTransferParams params)
{
NS_LOG_FUNCTION (this);
for (std::vector<EpcX2Sap::ErabsSubjectToStatusTransferItem>::iterator erabIt
= params.erabsSubjectToStatusTransferList.begin ();
erabIt != params.erabsSubjectToStatusTransferList.end ();
++erabIt)
{
// LtePdcp::Status status;
// status.txSn = erabIt->dlPdcpSn;
// status.rxSn = erabIt->ulPdcpSn;
// uint8_t drbId = Bid2Drbid (erabIt->erabId);
// std::map <uint8_t, Ptr<LteDataRadioBearerInfo> >::iterator drbIt = m_drbMap.find (drbId);
// NS_ASSERT_MSG (drbIt != m_drbMap.end (), "could not find DRBID " << (uint32_t) drbId);
// drbIt->second->m_pdcp->SetStatus (status);
}
}
void
UeManager::RecvUeContextRelease (EpcX2SapUser::UeContextReleaseParams params)
{
NS_LOG_FUNCTION (this);
NS_ASSERT_MSG (m_state == HANDOVER_LEAVING, "method unexpected in state " << ToString (m_state));
m_handoverLeavingTimeout.Cancel ();
}
// methods forwarded from RRC SAP
void
UeManager::CompleteSetupUe (LteEnbRrcSapProvider::CompleteSetupUeParameters params)
{
NS_LOG_FUNCTION (this);
m_srb0->m_rlc->SetLteRlcSapUser (params.srb0SapUser);
m_srb1->m_pdcp->SetLtePdcpSapUser (params.srb1SapUser);
}
void
UeManager::RecvRrcConnectionRequest (LteRrcSap::RrcConnectionRequest msg)
{
NS_LOG_FUNCTION (this);
switch (m_state)
{
case INITIAL_RANDOM_ACCESS:
{
m_connectionRequestTimeout.Cancel ();
if (m_rrc->m_admitRrcConnectionRequest == true)
{
m_imsi = msg.ueIdentity;
if (m_rrc->m_s1SapProvider != 0)
{
m_rrc->m_s1SapProvider->InitialUeMessage (m_imsi, m_rnti);
}
// send RRC CONNECTION SETUP to UE
LteRrcSap::RrcConnectionSetup msg2;
msg2.rrcTransactionIdentifier = GetNewRrcTransactionIdentifier ();
msg2.radioResourceConfigDedicated = BuildRadioResourceConfigDedicated ();
m_rrc->m_rrcSapUser->SendRrcConnectionSetup (m_rnti, msg2);
RecordDataRadioBearersToBeStarted ();
m_connectionSetupTimeout = Simulator::Schedule (
m_rrc->m_connectionSetupTimeoutDuration,
&LteEnbRrc::ConnectionSetupTimeout, m_rrc, m_rnti);
SwitchToState (CONNECTION_SETUP);
}
else
{
NS_LOG_INFO ("rejecting connection request for RNTI " << m_rnti);
// send RRC CONNECTION REJECT to UE
LteRrcSap::RrcConnectionReject rejectMsg;
rejectMsg.waitTime = 3;
m_rrc->m_rrcSapUser->SendRrcConnectionReject (m_rnti, rejectMsg);
m_connectionRejectedTimeout = Simulator::Schedule (
m_rrc->m_connectionRejectedTimeoutDuration,
&LteEnbRrc::ConnectionRejectedTimeout, m_rrc, m_rnti);
SwitchToState (CONNECTION_REJECTED);
}
}
break;
default:
NS_FATAL_ERROR ("method unexpected in state " << ToString (m_state));
break;
}
}
void
UeManager::RecvRrcConnectionSetupCompleted (LteRrcSap::RrcConnectionSetupCompleted msg)
{
NS_LOG_FUNCTION (this);
switch (m_state)
{
case CONNECTION_SETUP:
m_connectionSetupTimeout.Cancel ();
StartDataRadioBearers ();
SwitchToState (CONNECTED_NORMALLY);
m_rrc->m_connectionEstablishedTrace (m_imsi, m_rrc->m_cellId, m_rnti);
break;
default:
NS_FATAL_ERROR ("method unexpected in state " << ToString (m_state));
break;
}
}
void
UeManager::RecvRrcConnectionReconfigurationCompleted (LteRrcSap::RrcConnectionReconfigurationCompleted msg)
{
NS_LOG_FUNCTION (this);
switch (m_state)
{
case CONNECTION_RECONFIGURATION:
StartDataRadioBearers ();
if (m_needPhyMacConfiguration)
{
// configure MAC (and scheduler)
LteEnbCmacSapProvider::UeConfig req;
req.m_rnti = m_rnti;
req.m_transmissionMode = m_physicalConfigDedicated.antennaInfo.transmissionMode;
m_rrc->m_cmacSapProvider->UeUpdateConfigurationReq (req);
// configure PHY
m_rrc->m_cphySapProvider->SetTransmissionMode (req.m_rnti, req.m_transmissionMode);
double paDouble = LteRrcSap::ConvertPdschConfigDedicated2Double (m_physicalConfigDedicated.pdschConfigDedicated);
m_rrc->m_cphySapProvider->SetPa (m_rnti, paDouble);
m_needPhyMacConfiguration = false;
}
SwitchToState (CONNECTED_NORMALLY);
m_rrc->m_connectionReconfigurationTrace (m_imsi, m_rrc->m_cellId, m_rnti);
break;
// This case is added to NS-3 in order to handle bearer de-activation scenario for CONNECTED state UE
case CONNECTED_NORMALLY:
NS_LOG_INFO ("ignoring RecvRrcConnectionReconfigurationCompleted in state " << ToString (m_state));
break;
case HANDOVER_LEAVING:
NS_LOG_INFO ("ignoring RecvRrcConnectionReconfigurationCompleted in state " << ToString (m_state));
break;
case HANDOVER_JOINING:
{
m_handoverJoiningTimeout.Cancel ();
NS_LOG_INFO ("Send PATH SWITCH REQUEST to the MME");
EpcEnbS1SapProvider::PathSwitchRequestParameters params;
params.rnti = m_rnti;
params.cellId = m_rrc->m_cellId;
params.mmeUeS1Id = m_imsi;
SwitchToState (HANDOVER_PATH_SWITCH);
for (std::map <uint8_t, Ptr<LteDataRadioBearerInfo> >::iterator it = m_drbMap.begin ();
it != m_drbMap.end ();
++it)
{
EpcEnbS1SapProvider::BearerToBeSwitched b;
b.epsBearerId = it->second->m_epsBearerIdentity;
b.teid = it->second->m_gtpTeid;
params.bearersToBeSwitched.push_back (b);
}
m_rrc->m_s1SapProvider->PathSwitchRequest (params);
}
break;
default:
NS_FATAL_ERROR ("method unexpected in state " << ToString (m_state));
break;
}
}
void
UeManager::RecvRrcConnectionReestablishmentRequest (LteRrcSap::RrcConnectionReestablishmentRequest msg)
{
NS_LOG_FUNCTION (this);
switch (m_state)
{
case CONNECTED_NORMALLY:
break;
case HANDOVER_LEAVING:
m_handoverLeavingTimeout.Cancel ();
break;
default:
NS_FATAL_ERROR ("method unexpected in state " << ToString (m_state));
break;
}
LteRrcSap::RrcConnectionReestablishment msg2;
msg2.rrcTransactionIdentifier = GetNewRrcTransactionIdentifier ();
msg2.radioResourceConfigDedicated = BuildRadioResourceConfigDedicated ();
m_rrc->m_rrcSapUser->SendRrcConnectionReestablishment (m_rnti, msg2);
SwitchToState (CONNECTION_REESTABLISHMENT);
}
void
UeManager::RecvRrcConnectionReestablishmentComplete (LteRrcSap::RrcConnectionReestablishmentComplete msg)
{
NS_LOG_FUNCTION (this);
SwitchToState (CONNECTED_NORMALLY);
}
void
UeManager::RecvMeasurementReport (LteRrcSap::MeasurementReport msg)
{
uint8_t measId = msg.measResults.measId;
NS_LOG_FUNCTION (this << (uint16_t) measId);
NS_LOG_LOGIC ("measId " << (uint16_t) measId
<< " haveMeasResultNeighCells " << msg.measResults.haveMeasResultNeighCells
<< " measResultListEutra " << msg.measResults.measResultListEutra.size ());
NS_LOG_LOGIC ("serving cellId " << m_rrc->m_cellId
<< " RSRP " << (uint16_t) msg.measResults.rsrpResult
<< " RSRQ " << (uint16_t) msg.measResults.rsrqResult);
for (std::list <LteRrcSap::MeasResultEutra>::iterator it = msg.measResults.measResultListEutra.begin ();
it != msg.measResults.measResultListEutra.end ();
++it)
{
NS_LOG_LOGIC ("neighbour cellId " << it->physCellId
<< " RSRP " << (it->haveRsrpResult ? (uint16_t) it->rsrpResult : 255)
<< " RSRQ " << (it->haveRsrqResult ? (uint16_t) it->rsrqResult : 255));
}
if ((m_rrc->m_handoverManagementSapProvider != 0)
&& (m_rrc->m_handoverMeasIds.find (measId) != m_rrc->m_handoverMeasIds.end ()))
{
// this measurement was requested by the handover algorithm
m_rrc->m_handoverManagementSapProvider->ReportUeMeas (m_rnti,
msg.measResults);
}
if ((m_rrc->m_anrSapProvider != 0)
&& (m_rrc->m_anrMeasIds.find (measId) != m_rrc->m_anrMeasIds.end ()))
{
// this measurement was requested by the ANR function