lte-enb-rrc.h

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/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2011, 2012 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
 * Copyright (c) 2018 Fraunhofer ESK : RLF extensions
 *
 * 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> 
 * Modified by:
 *          Danilo Abrignani <danilo.abrignani@unibo.it> (Carrier Aggregation - GSoC 2015)
 *          Biljana Bojovic <biljana.bojovic@cttc.es> (Carrier Aggregation)
 *          Vignesh Babu <ns3-dev@esk.fraunhofer.de> (RLF extensions)
 */
 
#ifndef LTE_ENB_RRC_H
#define LTE_ENB_RRC_H
 
#include <ns3/nstime.h>
#include <ns3/object.h>
#include <ns3/traced-callback.h>
#include <ns3/event-id.h>
 
#include <ns3/lte-enb-cmac-sap.h>
#include <ns3/lte-mac-sap.h>
#include <ns3/ff-mac-sched-sap.h>
#include <ns3/ff-mac-csched-sap.h>
#include <ns3/lte-pdcp-sap.h>
#include <ns3/epc-x2-sap.h>
#include <ns3/epc-enb-s1-sap.h>
#include <ns3/lte-handover-management-sap.h>
#include <ns3/lte-ccm-rrc-sap.h>
#include <ns3/lte-enb-cphy-sap.h>
#include <ns3/lte-rrc-sap.h>
#include <ns3/lte-anr-sap.h>
#include <ns3/lte-ffr-rrc-sap.h>
#include <ns3/lte-rlc.h>
 
#include <map>
#include <set>
#include <ns3/component-carrier-enb.h>
#include <vector>
 
#define MIN_NO_CC 1
#define MAX_NO_CC 5 // this is the maximum number of carrier components allowed by 3GPP up to R13
 
namespace ns3 {
 
class LteRadioBearerInfo;
class LteSignalingRadioBearerInfo;
class LteDataRadioBearerInfo;
class LteEnbRrc;
class Packet;
 
 
 
class UeManager : public Object
{
  friend class LtePdcpSpecificLtePdcpSapUser<UeManager>;
 
public:
 
 
  enum State
  {
    INITIAL_RANDOM_ACCESS = 0,
    CONNECTION_SETUP,
    CONNECTION_REJECTED,
    ATTACH_REQUEST,
    CONNECTED_NORMALLY,
    CONNECTION_RECONFIGURATION,
    CONNECTION_REESTABLISHMENT,
    HANDOVER_PREPARATION,
    HANDOVER_JOINING,
    HANDOVER_PATH_SWITCH,
    HANDOVER_LEAVING,
    NUM_STATES
  };
 
  UeManager ();
 
  UeManager (Ptr<LteEnbRrc> rrc, uint16_t rnti, State s, uint8_t componentCarrierId);
 
  virtual ~UeManager (void);
 
  // inherited from Object
protected:
  virtual void DoInitialize ();
  virtual void DoDispose ();
public: 
  static TypeId GetTypeId (void);
 
  void SetSource (uint16_t sourceCellId, uint16_t sourceX2apId);
 
  void SetImsi (uint64_t imsi);
 
  void InitialContextSetupRequest ();
 
  void SetupDataRadioBearer (EpsBearer bearer, uint8_t bearerId, uint32_t gtpTeid, Ipv4Address transportLayerAddress);
 
  void RecordDataRadioBearersToBeStarted ();
 
  void StartDataRadioBearers ();
 
  void ReleaseDataRadioBearer (uint8_t drbid);
 
  void ScheduleRrcConnectionReconfiguration ();
 
  void PrepareHandover (uint16_t cellId);
 
  void RecvHandoverRequestAck (EpcX2SapUser::HandoverRequestAckParams params);
 
  LteRrcSap::RadioResourceConfigDedicated GetRadioResourceConfigForHandoverPreparationInfo ();
 
  LteRrcSap::RrcConnectionReconfiguration GetRrcConnectionReconfigurationForHandover ();
 
  void SendData (uint8_t bid, Ptr<Packet> p);
 
  std::vector<EpcX2Sap::ErabToBeSetupItem> GetErabList ();
 
  void SendUeContextRelease ();
 
  void RecvHandoverPreparationFailure (uint16_t cellId);
 
  void RecvSnStatusTransfer (EpcX2SapUser::SnStatusTransferParams params);
 
  void RecvUeContextRelease (EpcX2SapUser::UeContextReleaseParams params); 
 
 
  // METHODS FORWARDED FROM ENB RRC SAP ///////////////////////////////////////
 
  void CompleteSetupUe (LteEnbRrcSapProvider::CompleteSetupUeParameters params);
  void RecvRrcConnectionRequest (LteRrcSap::RrcConnectionRequest msg);
  void RecvRrcConnectionSetupCompleted (LteRrcSap::RrcConnectionSetupCompleted msg);
  void RecvRrcConnectionReconfigurationCompleted (LteRrcSap::RrcConnectionReconfigurationCompleted msg);
  void RecvRrcConnectionReestablishmentRequest (LteRrcSap::RrcConnectionReestablishmentRequest msg);
  void RecvRrcConnectionReestablishmentComplete (LteRrcSap::RrcConnectionReestablishmentComplete msg);
  void RecvMeasurementReport (LteRrcSap::MeasurementReport msg);
  void RecvIdealUeContextRemoveRequest (uint16_t rnti);
 
 
  // METHODS FORWARDED FROM ENB CMAC SAP //////////////////////////////////////
 
  void CmacUeConfigUpdateInd (LteEnbCmacSapUser::UeConfig cmacParams);
 
  // METHODS FORWARDED FROM ENB PDCP SAP //////////////////////////////////////
 
  void DoReceivePdcpSdu (LtePdcpSapUser::ReceivePdcpSduParameters params);
 
  uint16_t GetRnti (void) const;
 
  uint64_t GetImsi (void) const;
 
  uint8_t GetComponentCarrierId () const;
 
  uint16_t GetSrsConfigurationIndex (void) const;
 
  void SetSrsConfigurationIndex (uint16_t srsConfIndex);
 
  State GetState () const;
 
  void SetPdschConfigDedicated (LteRrcSap::PdschConfigDedicated pdschConfigDedicated);
 
  void CancelPendingEvents ();
 
  typedef void (*StateTracedCallback)
    (const uint64_t imsi, const uint16_t cellId, const uint16_t rnti,
    const State oldState, const State newState);
 
private:
 
  uint8_t AddDataRadioBearerInfo (Ptr<LteDataRadioBearerInfo> radioBearerInfo);
 
  Ptr<LteDataRadioBearerInfo> GetDataRadioBearerInfo (uint8_t drbid);
 
  void RemoveDataRadioBearerInfo (uint8_t drbid);
 
  LteRrcSap::RrcConnectionReconfiguration BuildRrcConnectionReconfiguration ();
 
  LteRrcSap::NonCriticalExtensionConfiguration BuildNonCriticalExtentionConfigurationCa ();
 
  LteRrcSap::RadioResourceConfigDedicated BuildRadioResourceConfigDedicated ();
 
  uint8_t GetNewRrcTransactionIdentifier ();
 
  uint8_t Lcid2Drbid (uint8_t lcid);
 
  uint8_t Drbid2Lcid (uint8_t drbid);
 
  uint8_t Lcid2Bid (uint8_t lcid);
 
  uint8_t Bid2Lcid (uint8_t bid);
 
  uint8_t Drbid2Bid (uint8_t drbid);
 
  uint8_t Bid2Drbid (uint8_t bid);
 
  void SendPacket (uint8_t bid, Ptr<Packet> p);
 
  void SwitchToState (State s);
 
  uint8_t m_lastAllocatedDrbid; 
 
  std::map <uint8_t, Ptr<LteDataRadioBearerInfo> > m_drbMap;
 
  Ptr<LteSignalingRadioBearerInfo> m_srb0;
  Ptr<LteSignalingRadioBearerInfo> m_srb1;
 
  uint16_t m_rnti;
  uint64_t m_imsi;
  uint8_t m_componentCarrierId;
  
  uint8_t m_lastRrcTransactionIdentifier; 
 
  LteRrcSap::PhysicalConfigDedicated m_physicalConfigDedicated; 
  Ptr<LteEnbRrc> m_rrc;
  State m_state;
  
  LtePdcpSapUser* m_drbPdcpSapUser; 
 
  bool m_pendingRrcConnectionReconfiguration; 
 
  TracedCallback<uint64_t, uint16_t, uint16_t, State, State> m_stateTransitionTrace;
 
  TracedCallback<uint64_t, uint16_t, uint16_t, uint8_t> m_drbCreatedTrace;
 
  uint16_t m_sourceX2apId; 
  uint16_t m_targetX2apId; 
  uint16_t m_sourceCellId; 
  uint16_t m_targetCellId; 
  std::list<uint8_t> m_drbsToBeStarted; 
  bool m_needPhyMacConfiguration; 
 
  EventId m_connectionRequestTimeout;
  EventId m_connectionSetupTimeout;
  EventId m_connectionRejectedTimeout;
  EventId m_handoverJoiningTimeout;
  EventId m_handoverLeavingTimeout;
 
  bool m_caSupportConfigured;
 
  bool m_pendingStartDataRadioBearers;
 
 
  std::list<std::pair<uint8_t, Ptr<Packet> > > m_packetBuffer;
 
}; // end of `class UeManager`
 
 
 
class LteEnbRrc : public Object
{
 
  friend class EnbRrcMemberLteEnbCmacSapUser;
  friend class MemberLteHandoverManagementSapUser<LteEnbRrc>;
  friend class MemberLteAnrSapUser<LteEnbRrc>;
  friend class MemberLteFfrRrcSapUser<LteEnbRrc>;
  friend class MemberLteEnbRrcSapProvider<LteEnbRrc>;
  friend class MemberEpcEnbS1SapUser<LteEnbRrc>;
  friend class EpcX2SpecificEpcX2SapUser<LteEnbRrc>;
  friend class UeManager;
  friend class MemberLteCcmRrcSapUser<LteEnbRrc>;
 
public:
  LteEnbRrc ();
 
  virtual ~LteEnbRrc ();
 
 
  // inherited from Object
protected:
  virtual void DoDispose (void);
public:
  static TypeId GetTypeId (void);
 
  void SetEpcX2SapProvider (EpcX2SapProvider* s);
 
  EpcX2SapUser* GetEpcX2SapUser ();
 
 
  void SetLteEnbCmacSapProvider (LteEnbCmacSapProvider * s);
 
  void SetLteEnbCmacSapProvider (LteEnbCmacSapProvider * s, uint8_t pos);
 
  LteEnbCmacSapUser* GetLteEnbCmacSapUser ();
 
  LteEnbCmacSapUser* GetLteEnbCmacSapUser (uint8_t pos);
 
  void SetLteHandoverManagementSapProvider (LteHandoverManagementSapProvider * s);
 
  LteHandoverManagementSapUser* GetLteHandoverManagementSapUser ();
 
 
  void SetLteCcmRrcSapProvider (LteCcmRrcSapProvider * s);
 
  LteCcmRrcSapUser* GetLteCcmRrcSapUser ();
 
 
  void SetLteAnrSapProvider (LteAnrSapProvider * s);
 
  LteAnrSapUser* GetLteAnrSapUser ();
 
 
 
  void SetLteFfrRrcSapProvider (LteFfrRrcSapProvider * s);
  void SetLteFfrRrcSapProvider (LteFfrRrcSapProvider * s, uint8_t index);
 
  LteFfrRrcSapUser* GetLteFfrRrcSapUser ();
  LteFfrRrcSapUser* GetLteFfrRrcSapUser (uint8_t index);
 
  void SetLteEnbRrcSapUser (LteEnbRrcSapUser * s);
 
  LteEnbRrcSapProvider* GetLteEnbRrcSapProvider ();
 
  void SetLteMacSapProvider (LteMacSapProvider* s);
 
 
  void SetS1SapProvider (EpcEnbS1SapProvider * s);
 
  EpcEnbS1SapUser* GetS1SapUser ();
 
 
  void SetLteEnbCphySapProvider (LteEnbCphySapProvider * s);
 
  void SetLteEnbCphySapProvider (LteEnbCphySapProvider * s, uint8_t pos);
 
  LteEnbCphySapUser* GetLteEnbCphySapUser ();
 
  LteEnbCphySapUser* GetLteEnbCphySapUser (uint8_t pos);
 
  bool HasUeManager (uint16_t rnti) const;
 
  Ptr<UeManager> GetUeManager (uint16_t rnti);
 
  uint8_t AddUeMeasReportConfig (LteRrcSap::ReportConfigEutra config);
 
  void ConfigureCell (std::map<uint8_t, Ptr<ComponentCarrierBaseStation> > ccPhyConf);
 
  void ConfigureCarriers (std::map<uint8_t, Ptr<ComponentCarrierBaseStation>> ccPhyConf);
 
  void SetCellId (uint16_t m_cellId);
 
  void SetCellId (uint16_t m_cellId, uint8_t ccIndex);
 
  uint8_t CellToComponentCarrierId (uint16_t cellId);
 
  uint16_t ComponentCarrierToCellId (uint8_t componentCarrierId);
 
  bool SendData (Ptr<Packet> p);
 
  void SetForwardUpCallback (Callback <void, Ptr<Packet> > cb);
 
  void ConnectionRequestTimeout (uint16_t rnti);
 
  void ConnectionSetupTimeout (uint16_t rnti);
 
  void ConnectionRejectedTimeout (uint16_t rnti);
 
  void HandoverJoiningTimeout (uint16_t rnti);
 
  void HandoverLeavingTimeout (uint16_t rnti);
 
  void SendHandoverRequest (uint16_t rnti, uint16_t cellId);
 
  void DoSendReleaseDataRadioBearer (uint64_t imsi, uint16_t rnti, uint8_t bearerId);
 
  enum LteEpsBearerToRlcMapping_t {RLC_SM_ALWAYS = 1,
                                   RLC_UM_ALWAYS = 2,
                                   RLC_AM_ALWAYS = 3,
                                   PER_BASED = 4};
 
  typedef void (*NewUeContextTracedCallback)
    (const uint16_t cellId, const uint16_t rnti);
 
  typedef void (*ConnectionHandoverTracedCallback)
    (const uint64_t imsi, const uint16_t cellId, const uint16_t rnti);
 
  typedef void (*HandoverStartTracedCallback)
    (const uint64_t imsi, const uint16_t cellId, const uint16_t rnti,
     const uint16_t targetCid);
 
  typedef void (*ReceiveReportTracedCallback)
    (const uint64_t imsi, const uint16_t cellId, const uint16_t rnti,
     const LteRrcSap::MeasurementReport report);
 
  typedef void (*TimerExpiryTracedCallback)
      (const uint64_t imsi, const uint16_t rnti, const uint16_t cellId,
       const std::string cause);
 
 
private:
 
 
  // RRC SAP methods
 
  void DoCompleteSetupUe (uint16_t rnti, LteEnbRrcSapProvider::CompleteSetupUeParameters params);
  void DoRecvRrcConnectionRequest (uint16_t rnti, LteRrcSap::RrcConnectionRequest msg);
  void DoRecvRrcConnectionSetupCompleted (uint16_t rnti, LteRrcSap::RrcConnectionSetupCompleted msg);
  void DoRecvRrcConnectionReconfigurationCompleted (uint16_t rnti, LteRrcSap::RrcConnectionReconfigurationCompleted msg);
  void DoRecvRrcConnectionReestablishmentRequest (uint16_t rnti, LteRrcSap::RrcConnectionReestablishmentRequest msg);
  void DoRecvRrcConnectionReestablishmentComplete (uint16_t rnti, LteRrcSap::RrcConnectionReestablishmentComplete msg);
  void DoRecvMeasurementReport (uint16_t rnti, LteRrcSap::MeasurementReport msg);
  void DoRecvIdealUeContextRemoveRequest (uint16_t rnti);
 
  // S1 SAP methods
 
  void DoInitialContextSetupRequest (EpcEnbS1SapUser::InitialContextSetupRequestParameters params);
  void DoDataRadioBearerSetupRequest (EpcEnbS1SapUser::DataRadioBearerSetupRequestParameters params);
  void DoPathSwitchRequestAcknowledge (EpcEnbS1SapUser::PathSwitchRequestAcknowledgeParameters params);
 
  // X2 SAP methods
 
  void DoRecvHandoverRequest (EpcX2SapUser::HandoverRequestParams params);
  void DoRecvHandoverRequestAck (EpcX2SapUser::HandoverRequestAckParams params);
  void DoRecvHandoverPreparationFailure (EpcX2SapUser::HandoverPreparationFailureParams params);
  void DoRecvSnStatusTransfer (EpcX2SapUser::SnStatusTransferParams params);
  void DoRecvUeContextRelease (EpcX2SapUser::UeContextReleaseParams params);
  void DoRecvLoadInformation (EpcX2SapUser::LoadInformationParams params);
  void DoRecvResourceStatusUpdate (EpcX2SapUser::ResourceStatusUpdateParams params);
  void DoRecvUeData (EpcX2SapUser::UeDataParams params);
 
  // CMAC SAP methods
 
  uint16_t DoAllocateTemporaryCellRnti (uint8_t componentCarrierId);
  void DoNotifyLcConfigResult (uint16_t rnti, uint8_t lcid, bool success);
  void DoRrcConfigurationUpdateInd (LteEnbCmacSapUser::UeConfig params);
 
  // Handover Management SAP methods
 
  uint8_t DoAddUeMeasReportConfigForHandover (LteRrcSap::ReportConfigEutra reportConfig);
  uint8_t DoAddUeMeasReportConfigForComponentCarrier (LteRrcSap::ReportConfigEutra reportConfig);
  void DoSetNumberOfComponentCarriers (uint16_t numberOfComponentCarriers);
 
 
  void DoTriggerHandover (uint16_t rnti, uint16_t targetCellId);
 
  // ANR SAP methods
 
  uint8_t DoAddUeMeasReportConfigForAnr (LteRrcSap::ReportConfigEutra reportConfig);
 
  // FFR RRC SAP methods
  uint8_t DoAddUeMeasReportConfigForFfr (LteRrcSap::ReportConfigEutra reportConfig);
  void DoSetPdschConfigDedicated (uint16_t rnti, LteRrcSap::PdschConfigDedicated pa);
  void DoSendLoadInformation (EpcX2Sap::LoadInformationParams params);
 
  // Internal methods
 
  uint16_t AddUe (UeManager::State state, uint8_t componentCarrierId);
 
  void RemoveUe (uint16_t rnti);
 
 
  TypeId GetRlcType (EpsBearer bearer);
 
  bool IsRandomAccessCompleted (uint16_t rnti);
 
 
 
public:
 
  void AddX2Neighbour (uint16_t cellId);
 
  void SetSrsPeriodicity (uint32_t p);
 
  uint32_t GetSrsPeriodicity () const;
 
  void SetCsgId (uint32_t csgId, bool csgIndication);
 
private:
 
  uint16_t GetNewSrsConfigurationIndex (void);
 
  void RemoveSrsConfigurationIndex (uint16_t srcCi);
 
 
 
  uint8_t GetLogicalChannelGroup (EpsBearer bearer);
 
  uint8_t GetLogicalChannelPriority (EpsBearer bearer);
 
 
  void SendSystemInformation ();
 
  Callback <void, Ptr<Packet> > m_forwardUpCallback;  
 
  EpcX2SapUser* m_x2SapUser;
  EpcX2SapProvider* m_x2SapProvider;
 
  std::vector<LteEnbCmacSapUser*> m_cmacSapUser;
  std::vector<LteEnbCmacSapProvider*> m_cmacSapProvider;
 
  LteHandoverManagementSapUser* m_handoverManagementSapUser;
  LteHandoverManagementSapProvider* m_handoverManagementSapProvider;
 
  LteCcmRrcSapUser* m_ccmRrcSapUser;
  LteCcmRrcSapProvider* m_ccmRrcSapProvider;
 
  LteAnrSapUser* m_anrSapUser;
  LteAnrSapProvider* m_anrSapProvider;
 
  std::vector<LteFfrRrcSapUser*> m_ffrRrcSapUser;
  std::vector<LteFfrRrcSapProvider*> m_ffrRrcSapProvider;
 
  LteEnbRrcSapUser* m_rrcSapUser;
  LteEnbRrcSapProvider* m_rrcSapProvider;
 
  LteMacSapProvider* m_macSapProvider;
 
  EpcEnbS1SapProvider* m_s1SapProvider;
  EpcEnbS1SapUser* m_s1SapUser;
 
  std::vector<LteEnbCphySapUser*> m_cphySapUser;
  std::vector<LteEnbCphySapProvider*> m_cphySapProvider;
 
  bool m_configured;
  uint32_t m_dlEarfcn;
  uint32_t m_ulEarfcn;
  uint16_t m_dlBandwidth;
  uint16_t m_ulBandwidth;
  uint16_t m_lastAllocatedRnti;
 
  std::vector<LteRrcSap::SystemInformationBlockType1> m_sib1;
 
  std::map<uint16_t, Ptr<UeManager> > m_ueMap;
 
  LteRrcSap::MeasConfig m_ueMeasConfig;
 
  std::set<uint8_t> m_handoverMeasIds;
  std::set<uint8_t> m_anrMeasIds;
  std::set<uint8_t> m_ffrMeasIds;
  std::set<uint8_t> m_componentCarrierMeasIds;
 
  struct X2uTeidInfo
  {
    uint16_t rnti; 
    uint8_t drbid; 
  };
 
  std::map<uint32_t, X2uTeidInfo> m_x2uTeidInfoMap;
 
  uint8_t m_defaultTransmissionMode;
  enum LteEpsBearerToRlcMapping_t m_epsBearerToRlcMapping;
  Time m_systemInformationPeriodicity;
  uint16_t m_srsCurrentPeriodicityId; 
  std::set<uint16_t> m_ueSrsConfigurationIndexSet; 
  uint16_t m_lastAllocatedConfigurationIndex; 
  bool m_reconfigureUes; 
 
  int8_t m_qRxLevMin;
  bool m_admitHandoverRequest;
  bool m_admitRrcConnectionRequest;
  uint8_t m_rsrpFilterCoefficient;
  uint8_t m_rsrqFilterCoefficient;
  Time m_connectionRequestTimeoutDuration;
  Time m_connectionSetupTimeoutDuration;
  Time m_connectionRejectedTimeoutDuration;
  Time m_handoverJoiningTimeoutDuration;
  Time m_handoverLeavingTimeoutDuration;
 
  TracedCallback<uint16_t, uint16_t> m_newUeContextTrace;
  TracedCallback<uint64_t, uint16_t, uint16_t> m_connectionEstablishedTrace;
  TracedCallback<uint64_t, uint16_t, uint16_t> m_connectionReconfigurationTrace;
  TracedCallback<uint64_t, uint16_t, uint16_t, uint16_t> m_handoverStartTrace;
  TracedCallback<uint64_t, uint16_t, uint16_t> m_handoverEndOkTrace;
  TracedCallback<uint64_t, uint16_t, uint16_t, LteRrcSap::MeasurementReport> m_recvMeasurementReportTrace;
  TracedCallback<uint64_t, uint16_t, uint16_t> m_connectionReleaseTrace;
  TracedCallback<uint64_t, uint16_t, uint16_t, std::string> m_rrcTimeoutTrace;
 
  uint16_t m_numberOfComponentCarriers; 
 
  bool m_carriersConfigured; 
 
  std::map<uint8_t, Ptr<ComponentCarrierBaseStation>> m_componentCarrierPhyConf; 
 
}; // end of `class LteEnbRrc`
 
 
} // namespace ns3
 
#endif // LTE_ENB_RRC_H