lte-ue-rrc.h

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/*
 * Copyright (c) 2011 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
 *
 * Author: Nicola Baldo <nbaldo@cttc.es>
 *         Budiarto Herman <budiarto.herman@magister.fi>
 * 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_UE_RRC_H
#define LTE_UE_RRC_H
 
#include "lte-as-sap.h"
#include "lte-pdcp-sap.h"
#include "lte-rrc-sap.h"
#include "lte-ue-ccm-rrc-sap.h"
#include "lte-ue-cmac-sap.h"
#include "lte-ue-cphy-sap.h"
 
#include <ns3/object.h>
#include <ns3/packet.h>
#include <ns3/traced-callback.h>
 
#include <map>
#include <set>
#include <vector>
 
namespace ns3
{
 
static const Time UE_MEASUREMENT_REPORT_DELAY = MicroSeconds(1);
 
class LteRlc;
class LteMacSapProvider;
class LteUeCmacSapUser;
class LteUeCmacSapProvider;
class LteDataRadioBearerInfo;
class LteSignalingRadioBearerInfo;
 
class LteUeRrc : public Object
{
    friend class UeMemberLteUeCmacSapUser;
    friend class UeRrcMemberLteEnbCmacSapUser;
    friend class LtePdcpSpecificLtePdcpSapUser<LteUeRrc>;
    friend class MemberLteAsSapProvider<LteUeRrc>;
    friend class MemberLteUeCphySapUser<LteUeRrc>;
    friend class MemberLteUeRrcSapProvider<LteUeRrc>;
    friend class MemberLteUeCcmRrcSapUser<LteUeRrc>;
 
  public:
    enum State
    {
        IDLE_START = 0,
        IDLE_CELL_SEARCH,
        IDLE_WAIT_MIB_SIB1,
        IDLE_WAIT_MIB,
        IDLE_WAIT_SIB1,
        IDLE_CAMPED_NORMALLY,
        IDLE_WAIT_SIB2,
        IDLE_RANDOM_ACCESS,
        IDLE_CONNECTING,
        CONNECTED_NORMALLY,
        CONNECTED_HANDOVER,
        CONNECTED_PHY_PROBLEM,
        CONNECTED_REESTABLISHING,
        NUM_STATES
    };
 
    LteUeRrc();
 
    ~LteUeRrc() override;
 
    // inherited from Object
  private:
    void DoInitialize() override;
    void DoDispose() override;
 
  public:
    static TypeId GetTypeId();
 
    void InitializeSap();
 
    void SetLteUeCphySapProvider(LteUeCphySapProvider* s);
    void SetLteUeCphySapProvider(LteUeCphySapProvider* s, uint8_t index);
 
    LteUeCphySapUser* GetLteUeCphySapUser();
    LteUeCphySapUser* GetLteUeCphySapUser(uint8_t index);
 
    void SetLteUeCmacSapProvider(LteUeCmacSapProvider* s);
    void SetLteUeCmacSapProvider(LteUeCmacSapProvider* s, uint8_t index);
 
    LteUeCmacSapUser* GetLteUeCmacSapUser();
    LteUeCmacSapUser* GetLteUeCmacSapUser(uint8_t index);
 
    void SetLteUeRrcSapUser(LteUeRrcSapUser* s);
 
    LteUeRrcSapProvider* GetLteUeRrcSapProvider();
 
    void SetLteMacSapProvider(LteMacSapProvider* s);
 
    void SetAsSapUser(LteAsSapUser* s);
 
    LteAsSapProvider* GetAsSapProvider();
 
    void SetLteCcmRrcSapProvider(LteUeCcmRrcSapProvider* s);
 
    LteUeCcmRrcSapUser* GetLteCcmRrcSapUser();
 
    void SetImsi(uint64_t imsi);
 
    void StorePreviousCellId(uint16_t cellId);
 
    uint64_t GetImsi() const;
 
    uint16_t GetRnti() const;
 
    uint16_t GetCellId() const;
 
    bool IsServingCell(uint16_t cellId) const;
 
    uint8_t GetUlBandwidth() const;
 
    uint8_t GetDlBandwidth() const;
 
    uint32_t GetDlEarfcn() const;
 
    uint32_t GetUlEarfcn() const;
 
    State GetState() const;
 
    uint16_t GetPreviousCellId() const;
 
    void SetUseRlcSm(bool val);
 
    static const std::string ToString(LteUeRrc::State s);
 
    typedef void (*CellSelectionTracedCallback)(uint64_t imsi, uint16_t cellId);
 
    typedef void (*ImsiCidRntiTracedCallback)(uint64_t imsi, uint16_t cellId, uint16_t rnti);
 
    typedef void (*MibSibHandoverTracedCallback)(uint64_t imsi,
                                                 uint16_t cellId,
                                                 uint16_t rnti,
                                                 uint16_t otherCid);
 
    typedef void (*StateTracedCallback)(uint64_t imsi,
                                        uint16_t cellId,
                                        uint16_t rnti,
                                        State oldState,
                                        State newState);
 
    typedef void (*SCarrierConfiguredTracedCallback)(Ptr<LteUeRrc>,
                                                     std::list<LteRrcSap::SCellToAddMod>);
 
    typedef void (*PhySyncDetectionTracedCallback)(uint64_t imsi,
                                                   uint16_t rnti,
                                                   uint16_t cellId,
                                                   std::string type,
                                                   uint16_t count);
 
    typedef void (*ImsiCidRntiCountTracedCallback)(uint64_t imsi,
                                                   uint16_t cellId,
                                                   uint16_t rnti,
                                                   uint8_t count);
 
  private:
    // PDCP SAP methods
    void DoReceivePdcpSdu(LtePdcpSapUser::ReceivePdcpSduParameters params);
 
    // CMAC SAP methods
    void DoSetTemporaryCellRnti(uint16_t rnti);
    void DoNotifyRandomAccessSuccessful();
    void DoNotifyRandomAccessFailed();
 
    // LTE AS SAP methods
    void DoSetCsgWhiteList(uint32_t csgId);
    void DoForceCampedOnEnb(uint16_t cellId, uint32_t dlEarfcn);
    void DoStartCellSelection(uint32_t dlEarfcn);
    void DoConnect();
    void DoSendData(Ptr<Packet> packet, uint8_t bid);
    void DoDisconnect();
 
    // CPHY SAP methods
    void DoRecvMasterInformationBlock(uint16_t cellId, LteRrcSap::MasterInformationBlock msg);
    void DoRecvSystemInformationBlockType1(uint16_t cellId,
                                           LteRrcSap::SystemInformationBlockType1 msg);
    void DoReportUeMeasurements(LteUeCphySapUser::UeMeasurementsParameters params);
 
    // RRC SAP methods
 
    void DoCompleteSetup(LteUeRrcSapProvider::CompleteSetupParameters params);
    void DoRecvSystemInformation(LteRrcSap::SystemInformation msg);
    void DoRecvRrcConnectionSetup(LteRrcSap::RrcConnectionSetup msg);
    void DoRecvRrcConnectionReconfiguration(LteRrcSap::RrcConnectionReconfiguration msg);
    void DoRecvRrcConnectionReestablishment(LteRrcSap::RrcConnectionReestablishment msg);
    void DoRecvRrcConnectionReestablishmentReject(
        LteRrcSap::RrcConnectionReestablishmentReject msg);
    void DoRecvRrcConnectionRelease(LteRrcSap::RrcConnectionRelease msg);
    void DoRecvRrcConnectionReject(LteRrcSap::RrcConnectionReject msg);
 
    void DoSetNumberOfComponentCarriers(uint16_t noOfComponentCarriers);
 
    // INTERNAL METHODS
 
    void SynchronizeToStrongestCell();
 
    void EvaluateCellForSelection();
 
    void ApplyMeasConfig(LteRrcSap::MeasConfig mc);
 
    void SaveUeMeasurements(uint16_t cellId,
                            double rsrp,
                            double rsrq,
                            bool useLayer3Filtering,
                            uint8_t componentCarrierId);
 
    void MeasurementReportTriggering(uint8_t measId);
 
    void SendMeasurementReport(uint8_t measId);
 
    void ApplyRadioResourceConfigDedicated(LteRrcSap::RadioResourceConfigDedicated rrcd);
    void ApplyRadioResourceConfigDedicatedSecondaryCarrier(
        LteRrcSap::NonCriticalExtensionConfiguration nonCec);
    void StartConnection();
    void LeaveConnectedMode();
    void DisposeOldSrb1();
    uint8_t Bid2Drbid(uint8_t bid);
    void SwitchToState(State s);
 
    std::map<uint8_t, uint8_t> m_bid2DrbidMap; 
 
    std::vector<LteUeCphySapUser*> m_cphySapUser;         
    std::vector<LteUeCphySapProvider*> m_cphySapProvider; 
 
    std::vector<LteUeCmacSapUser*> m_cmacSapUser;         
    std::vector<LteUeCmacSapProvider*> m_cmacSapProvider; 
 
    LteUeRrcSapUser* m_rrcSapUser;         
    LteUeRrcSapProvider* m_rrcSapProvider; 
 
    LteMacSapProvider* m_macSapProvider; 
    LtePdcpSapUser* m_drbPdcpSapUser;    
 
    LteAsSapProvider* m_asSapProvider; 
    LteAsSapUser* m_asSapUser;         
 
    // Receive API calls from the LteUeComponentCarrierManager  instance.
    // LteCcmRrcSapUser* m_ccmRrcSapUser;
    LteUeCcmRrcSapProvider* m_ccmRrcSapProvider; 
    LteUeCcmRrcSapUser* m_ccmRrcSapUser;         
 
    State m_state;
 
    uint64_t m_imsi;
    uint16_t m_rnti;
    uint16_t m_cellId;
 
    Ptr<LteSignalingRadioBearerInfo> m_srb0;
    Ptr<LteSignalingRadioBearerInfo> m_srb1;
    Ptr<LteSignalingRadioBearerInfo> m_srb1Old;
    std::map<uint8_t, Ptr<LteDataRadioBearerInfo>> m_drbMap;
 
    bool m_useRlcSm;
 
    uint8_t m_lastRrcTransactionIdentifier; 
 
    LteRrcSap::PdschConfigDedicated m_pdschConfigDedicated; 
 
    uint16_t m_dlBandwidth; 
    uint16_t m_ulBandwidth; 
    uint32_t m_dlEarfcn;                                     
    uint32_t m_ulEarfcn;                                     
    std::list<LteRrcSap::SCellToAddMod> m_sCellToAddModList; 
    TracedCallback<uint64_t, uint16_t, uint16_t, uint16_t> m_mibReceivedTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t, uint16_t> m_sib1ReceivedTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t> m_sib2ReceivedTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t, State, State> m_stateTransitionTrace;
    TracedCallback<uint64_t, uint16_t> m_initialCellSelectionEndOkTrace;
    TracedCallback<uint64_t, uint16_t> m_initialCellSelectionEndErrorTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t> m_randomAccessSuccessfulTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t> m_randomAccessErrorTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t> m_connectionEstablishedTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t, uint8_t> m_connectionTimeoutTrace;
    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> m_handoverEndErrorTrace;
    TracedCallback<Ptr<LteUeRrc>, std::list<LteRrcSap::SCellToAddMod>> m_sCarrierConfiguredTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t> m_srb1CreatedTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t, uint8_t> m_drbCreatedTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t, std::string, uint8_t> m_phySyncDetectionTrace;
    TracedCallback<uint64_t, uint16_t, uint16_t> m_radioLinkFailureTrace;
 
    bool m_connectionPending;
    bool m_hasReceivedMib;
    bool m_hasReceivedSib1;
    bool m_hasReceivedSib2;
 
    LteRrcSap::SystemInformationBlockType1 m_lastSib1;
 
    std::set<uint16_t> m_acceptableCell;
 
    uint32_t m_csgWhiteList;
 
    // INTERNAL DATA STRUCTURE RELATED TO UE MEASUREMENTS
 
    struct VarMeasConfig
    {
        std::map<uint8_t, LteRrcSap::MeasIdToAddMod> measIdList;         
        std::map<uint8_t, LteRrcSap::MeasObjectToAddMod> measObjectList; 
        std::map<uint8_t, LteRrcSap::ReportConfigToAddMod> reportConfigList; 
        LteRrcSap::QuantityConfig quantityConfig;                            
        double aRsrp;                                                        
        double aRsrq;                                                        
    };
 
    VarMeasConfig m_varMeasConfig;
 
    struct VarMeasReport
    {
        uint8_t measId;                        
        std::set<uint16_t> cellsTriggeredList; 
        uint32_t numberOfReportsSent;          
        EventId periodicReportTimer;           
    };
 
    std::map<uint8_t, VarMeasReport> m_varMeasReportList;
 
    typedef std::list<uint16_t> ConcernedCells_t;
 
    void VarMeasReportListAdd(uint8_t measId, ConcernedCells_t enteringCells);
 
    void VarMeasReportListErase(uint8_t measId, ConcernedCells_t leavingCells, bool reportOnLeave);
 
    void VarMeasReportListClear(uint8_t measId);
 
    struct MeasValues
    {
        double rsrp;          
        double rsrq;          
        uint32_t carrierFreq; 
    };
 
    std::map<uint16_t, MeasValues> m_storedMeasValues;
 
    std::map<uint16_t, std::map<uint8_t, MeasValues>> m_storedMeasValuesPerCarrier;
 
    std::map<uint16_t, MeasValues> m_storedScellMeasValues;
 
    struct PendingTrigger_t
    {
        uint8_t measId;                  
        ConcernedCells_t concernedCells; 
        EventId
            timer; 
    };
 
    std::map<uint8_t, std::list<PendingTrigger_t>> m_enteringTriggerQueue;
 
    std::map<uint8_t, std::list<PendingTrigger_t>> m_leavingTriggerQueue;
 
    void CancelEnteringTrigger(uint8_t measId);
 
    void CancelEnteringTrigger(uint8_t measId, uint16_t cellId);
 
    void CancelLeavingTrigger(uint8_t measId);
 
    void CancelLeavingTrigger(uint8_t measId, uint16_t cellId);
 
    Time m_t300;
 
    EventId m_connectionTimeout;
 
    void ConnectionTimeout();
 
    Time m_t310;
 
    uint8_t m_n310;
 
    uint8_t m_n311;
 
    EventId m_radioLinkFailureDetected;
 
    uint8_t m_noOfSyncIndications; 
 
    bool m_leaveConnectedMode; 
 
    uint16_t m_previousCellId; 
 
    uint8_t m_connEstFailCountLimit; 
 
    uint8_t m_connEstFailCount; 
    void RadioLinkFailureDetected();
 
    void DoNotifyInSync();
 
    void DoNotifyOutOfSync();
 
    void DoResetSyncIndicationCounter();
 
    void ResetRlfParams();
 
  public:
    uint16_t m_numberOfComponentCarriers;
 
}; // end of class LteUeRrc
 
} // namespace ns3
 
#endif // LTE_UE_RRC_H