three-gpp-channel-model.h

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/*
 * Copyright (c) 2015, NYU WIRELESS, Tandon School of Engineering,
 * New York University
 * Copyright (c) 2019 SIGNET Lab, Department of Information Engineering,
 * University of Padova
 *
 * 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
 */
 
#ifndef THREE_GPP_CHANNEL_H
#define THREE_GPP_CHANNEL_H
 
#include "ns3/angles.h"
#include <ns3/boolean.h>
#include <ns3/channel-condition-model.h>
#include <ns3/matrix-based-channel-model.h>
 
#include <complex.h>
#include <unordered_map>
 
namespace ns3
{
 
class MobilityModel;
 
class ThreeGppChannelModel : public MatrixBasedChannelModel
{
  public:
    ThreeGppChannelModel();
 
    ~ThreeGppChannelModel() override;
 
    void DoDispose() override;
 
    static TypeId GetTypeId();
 
    void SetChannelConditionModel(Ptr<ChannelConditionModel> model);
 
    Ptr<ChannelConditionModel> GetChannelConditionModel() const;
 
    void SetFrequency(double f);
 
    double GetFrequency() const;
 
    void SetScenario(const std::string& scenario);
 
    std::string GetScenario() const;
 
    Ptr<const ChannelMatrix> GetChannel(Ptr<const MobilityModel> aMob,
                                        Ptr<const MobilityModel> bMob,
                                        Ptr<const PhasedArrayModel> aAntenna,
                                        Ptr<const PhasedArrayModel> bAntenna) override;
 
    Ptr<const ChannelParams> GetParams(Ptr<const MobilityModel> aMob,
                                       Ptr<const MobilityModel> bMob) const override;
    int64_t AssignStreams(int64_t stream);
 
  protected:
    static std::pair<double, double> WrapAngles(double azimuthRad, double inclinationRad);
 
    void Shuffle(double* first, double* last) const;
 
    struct ThreeGppChannelParams : public MatrixBasedChannelModel::ChannelParams
    {
        ChannelCondition::LosConditionValue
            m_losCondition; 
        ChannelCondition::O2iConditionValue
            m_o2iCondition; 
        // TODO these are not currently used, they have to be correctly set when including the
        // spatial consistent update procedure
        /*The following parameters are stored for spatial consistent updating. The notation is
        that of 3GPP technical reports, but it can apply also to other channel realizations*/
        MatrixBasedChannelModel::Double2DVector m_nonSelfBlocking; 
        Vector m_preLocUT; 
        Vector m_locUT;    
        MatrixBasedChannelModel::Double2DVector
            m_norRvAngles; 
        double m_DS;       
        double m_K_factor; 
        uint8_t m_reducedClusterNumber; 
        MatrixBasedChannelModel::Double2DVector
            m_rayAodRadian; 
        MatrixBasedChannelModel::Double2DVector
            m_rayAoaRadian; 
        MatrixBasedChannelModel::Double2DVector
            m_rayZodRadian; 
        MatrixBasedChannelModel::Double2DVector
            m_rayZoaRadian; 
        MatrixBasedChannelModel::Double3DVector m_clusterPhase; 
        MatrixBasedChannelModel::Double2DVector
            m_crossPolarizationPowerRatios; 
        Vector m_speed;                     
        double m_dis2D;                     
        double m_dis3D;                     
        DoubleVector m_clusterPower;        
        DoubleVector m_attenuation_dB;      
        uint8_t m_cluster1st;               
        uint8_t m_cluster2nd;               
    };
 
    struct ParamsTable : public SimpleRefCount<ParamsTable>
    {
        uint8_t m_numOfCluster = 0;   
        uint8_t m_raysPerCluster = 0; 
        double m_uLgDS = 0;           
        double m_sigLgDS = 0; 
        double m_uLgASD =
            0; 
        double m_sigLgASD =
            0; 
        double m_uLgASA = 0; 
        double m_sigLgASA =
            0; 
        double m_uLgZSA = 0; 
        double m_sigLgZSA =
            0; 
        double m_uLgZSD =
            0; 
        double m_sigLgZSD =
            0; 
        double m_offsetZOD = 0;              
        double m_cDS = 0;                    
        double m_cASD = 0;                   
        double m_cASA = 0;                   
        double m_cZSA = 0;                   
        double m_uK = 0;                     
        double m_sigK = 0;                   
        double m_rTau = 0;                   
        double m_uXpr = 0;                   
        double m_sigXpr = 0;                 
        double m_perClusterShadowingStd = 0; 
        double m_sqrtC[7][7]; 
    };
 
    virtual Ptr<const ParamsTable> GetThreeGppTable(Ptr<const ChannelCondition> channelCondition,
                                                    double hBS,
                                                    double hUT,
                                                    double distance2D) const;
 
    Ptr<ThreeGppChannelParams> GenerateChannelParameters(
        const Ptr<const ChannelCondition> channelCondition,
        const Ptr<const ParamsTable> table3gpp,
        const Ptr<const MobilityModel> aMob,
        const Ptr<const MobilityModel> bMob) const;
 
    virtual Ptr<ChannelMatrix> GetNewChannel(Ptr<const ThreeGppChannelParams> channelParams,
                                             Ptr<const ParamsTable> table3gpp,
                                             const Ptr<const MobilityModel> sMob,
                                             const Ptr<const MobilityModel> uMob,
                                             Ptr<const PhasedArrayModel> sAntenna,
                                             Ptr<const PhasedArrayModel> uAntenna) const;
    DoubleVector CalcAttenuationOfBlockage(
        const Ptr<ThreeGppChannelModel::ThreeGppChannelParams> channelParams,
        const DoubleVector& clusterAOA,
        const DoubleVector& clusterZOA) const;
 
    bool ChannelParamsNeedsUpdate(Ptr<const ThreeGppChannelParams> channelParams,
                                  Ptr<const ChannelCondition> channelCondition) const;
 
    bool ChannelMatrixNeedsUpdate(Ptr<const ThreeGppChannelParams> channelParams,
                                  Ptr<const ChannelMatrix> channelMatrix);
 
    std::unordered_map<uint64_t, Ptr<ChannelMatrix>>
        m_channelMatrixMap; 
    std::unordered_map<uint64_t, Ptr<ThreeGppChannelParams>>
        m_channelParamsMap; 
    Time m_updatePeriod;    
    double m_frequency;     
    std::string m_scenario; 
    Ptr<ChannelConditionModel> m_channelConditionModel; 
    Ptr<UniformRandomVariable> m_uniformRv;             
    Ptr<NormalRandomVariable> m_normalRv;               
    Ptr<UniformRandomVariable>
        m_uniformRvShuffle; 
 
    // Variable used to compute the additional Doppler contribution for the delayed
    // (reflected) paths, as described in 3GPP TR 37.885 v15.3.0, Sec. 6.2.3.
    double m_vScatt; 
    Ptr<UniformRandomVariable> m_uniformRvDoppler; 
 
    // parameters for the blockage model
    bool m_blockage;               
    uint16_t m_numNonSelfBlocking; 
    bool m_portraitMode;           
    double m_blockerSpeed;         
 
    static const uint8_t PHI_INDEX = 0; 
    static const uint8_t X_INDEX = 1;   
    static const uint8_t THETA_INDEX =
        2;                            
    static const uint8_t Y_INDEX = 3; 
    static const uint8_t R_INDEX = 4; 
};
} // namespace ns3
 
#endif /* THREE_GPP_CHANNEL_H */