channel-condition-model.h

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/*
 * 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 CHANNEL_CONDITION_MODEL_H
#define CHANNEL_CONDITION_MODEL_H
 
#include "ns3/nstime.h"
#include "ns3/object.h"
#include "ns3/random-variable-stream.h"
#include "ns3/vector.h"
 
#include <unordered_map>
 
namespace ns3
{
 
class MobilityModel;
 
class ChannelCondition : public Object
{
  public:
    enum LosConditionValue
    {
        LOS,   
        NLOS,  
        NLOSv, 
        LC_ND  
    };
 
    enum O2iConditionValue
    {
        O2O,   
        O2I,   
        I2I,   
        O2I_ND 
    };
 
    enum O2iLowHighConditionValue
    {
        LOW,      
        HIGH,     
        LH_O2I_ND 
    };
 
    static TypeId GetTypeId();
 
    ChannelCondition();
 
    ChannelCondition(LosConditionValue losCondition,
                     O2iConditionValue o2iCondition = O2O,
                     O2iLowHighConditionValue o2iLowHighCondition = LOW);
 
    ~ChannelCondition() override;
 
    LosConditionValue GetLosCondition() const;
 
    void SetLosCondition(LosConditionValue losCondition);
 
    O2iConditionValue GetO2iCondition() const;
 
    void SetO2iCondition(O2iConditionValue o2iCondition);
 
    O2iLowHighConditionValue GetO2iLowHighCondition() const;
 
    void SetO2iLowHighCondition(O2iLowHighConditionValue o2iLowHighCondition);
 
    bool IsLos() const;
 
    bool IsNlos() const;
 
    bool IsNlosv() const;
 
    bool IsO2i() const;
 
    bool IsO2o() const;
 
    bool IsI2i() const;
 
    bool IsEqual(LosConditionValue losCondition, O2iConditionValue o2iCondition) const;
 
  private:
    LosConditionValue
        m_losCondition; 
    O2iConditionValue
        m_o2iCondition; 
    O2iLowHighConditionValue m_o2iLowHighCondition; 
 
    friend std::ostream& operator<<(std::ostream& os, LosConditionValue cond);
};
 
class ChannelConditionModel : public Object
{
  public:
    static TypeId GetTypeId();
 
    ChannelConditionModel();
 
    ~ChannelConditionModel() override;
 
    // Delete copy constructor and assignment operator to avoid misuse
    ChannelConditionModel(const ChannelConditionModel&) = delete;
    ChannelConditionModel& operator=(const ChannelConditionModel&) = delete;
 
    virtual Ptr<ChannelCondition> GetChannelCondition(Ptr<const MobilityModel> a,
                                                      Ptr<const MobilityModel> b) const = 0;
 
    virtual int64_t AssignStreams(int64_t stream) = 0;
};
 
class AlwaysLosChannelConditionModel : public ChannelConditionModel
{
  public:
    static TypeId GetTypeId();
 
    AlwaysLosChannelConditionModel();
 
    ~AlwaysLosChannelConditionModel() override;
 
    // Delete copy constructor and assignment operator to avoid misuse
    AlwaysLosChannelConditionModel(const AlwaysLosChannelConditionModel&) = delete;
    AlwaysLosChannelConditionModel& operator=(const AlwaysLosChannelConditionModel&) = delete;
 
    Ptr<ChannelCondition> GetChannelCondition(Ptr<const MobilityModel> a,
                                              Ptr<const MobilityModel> b) const override;
 
    int64_t AssignStreams(int64_t stream) override;
};
 
class NeverLosChannelConditionModel : public ChannelConditionModel
{
  public:
    static TypeId GetTypeId();
 
    NeverLosChannelConditionModel();
 
    ~NeverLosChannelConditionModel() override;
 
    // Delete copy constructor and assignment operator to avoid misuse
    NeverLosChannelConditionModel(const NeverLosChannelConditionModel&) = delete;
    NeverLosChannelConditionModel& operator=(const NeverLosChannelConditionModel&) = delete;
 
    Ptr<ChannelCondition> GetChannelCondition(Ptr<const MobilityModel> a,
                                              Ptr<const MobilityModel> b) const override;
 
    int64_t AssignStreams(int64_t stream) override;
};
 
class NeverLosVehicleChannelConditionModel : public ChannelConditionModel
{
  public:
    static TypeId GetTypeId();
 
    NeverLosVehicleChannelConditionModel();
 
    ~NeverLosVehicleChannelConditionModel() override;
 
    // Delete copy constructor and assignment operator to avoid misuse
    NeverLosVehicleChannelConditionModel(const NeverLosVehicleChannelConditionModel&) = delete;
    NeverLosVehicleChannelConditionModel& operator=(const NeverLosVehicleChannelConditionModel&) =
        delete;
 
    Ptr<ChannelCondition> GetChannelCondition(Ptr<const MobilityModel> a,
                                              Ptr<const MobilityModel> b) const override;
 
    int64_t AssignStreams(int64_t stream) override;
};
 
class ThreeGppChannelConditionModel : public ChannelConditionModel
{
  public:
    static TypeId GetTypeId();
 
    ThreeGppChannelConditionModel();
 
    ~ThreeGppChannelConditionModel() override;
 
    Ptr<ChannelCondition> GetChannelCondition(Ptr<const MobilityModel> a,
                                              Ptr<const MobilityModel> b) const override;
 
    int64_t AssignStreams(int64_t stream) override;
 
  protected:
    void DoDispose() override;
 
    enum VehicleDensity
    {
        LOW,
        MEDIUM,
        HIGH,
        INVALID
    };
 
    static double Calculate2dDistance(const Vector& a, const Vector& b);
 
    Ptr<UniformRandomVariable> m_uniformVar; 
 
  private:
    Ptr<ChannelCondition> ComputeChannelCondition(Ptr<const MobilityModel> a,
                                                  Ptr<const MobilityModel> b) const;
 
    virtual double ComputePlos(Ptr<const MobilityModel> a, Ptr<const MobilityModel> b) const = 0;
 
    virtual ChannelCondition::O2iConditionValue ComputeO2i(Ptr<const MobilityModel> a,
                                                           Ptr<const MobilityModel> b) const;
 
    virtual double ComputePnlos(Ptr<const MobilityModel> a, Ptr<const MobilityModel> b) const;
 
    static uint32_t GetKey(Ptr<const MobilityModel> a, Ptr<const MobilityModel> b);
 
    struct Item
    {
        Ptr<ChannelCondition> m_condition; 
        Time m_generatedTime;              
    };
 
    std::unordered_map<uint32_t, Item>
        m_channelConditionMap; 
    Time m_updatePeriod;       
 
    double m_o2iThreshold{
        0}; 
    double m_o2iLowLossThreshold{0}; 
    bool m_linkO2iConditionToAntennaHeight{
        false}; 
    Ptr<UniformRandomVariable> m_uniformVarO2i; 
    Ptr<UniformRandomVariable>
        m_uniformO2iLowHighLossVar; 
};
 
class ThreeGppRmaChannelConditionModel : public ThreeGppChannelConditionModel
{
  public:
    static TypeId GetTypeId();
 
    ThreeGppRmaChannelConditionModel();
 
    ~ThreeGppRmaChannelConditionModel() override;
 
  private:
    double ComputePlos(Ptr<const MobilityModel> a, Ptr<const MobilityModel> b) const override;
};
 
class ThreeGppUmaChannelConditionModel : public ThreeGppChannelConditionModel
{
  public:
    static TypeId GetTypeId();
 
    ThreeGppUmaChannelConditionModel();
 
    ~ThreeGppUmaChannelConditionModel() override;
 
  private:
    double ComputePlos(Ptr<const MobilityModel> a, Ptr<const MobilityModel> b) const override;
};
 
class ThreeGppUmiStreetCanyonChannelConditionModel : public ThreeGppChannelConditionModel
{
  public:
    static TypeId GetTypeId();
 
    ThreeGppUmiStreetCanyonChannelConditionModel();
 
    ~ThreeGppUmiStreetCanyonChannelConditionModel() override;
 
  private:
    double ComputePlos(Ptr<const MobilityModel> a, Ptr<const MobilityModel> b) const override;
};
 
class ThreeGppIndoorMixedOfficeChannelConditionModel : public ThreeGppChannelConditionModel
{
  public:
    static TypeId GetTypeId();
 
    ThreeGppIndoorMixedOfficeChannelConditionModel();
 
    ~ThreeGppIndoorMixedOfficeChannelConditionModel() override;
 
  private:
    double ComputePlos(Ptr<const MobilityModel> a, Ptr<const MobilityModel> b) const override;
};
 
class ThreeGppIndoorOpenOfficeChannelConditionModel : public ThreeGppChannelConditionModel
{
  public:
    static TypeId GetTypeId();
 
    ThreeGppIndoorOpenOfficeChannelConditionModel();
 
    ~ThreeGppIndoorOpenOfficeChannelConditionModel() override;
 
  private:
    double ComputePlos(Ptr<const MobilityModel> a, Ptr<const MobilityModel> b) const override;
};
 
} // namespace ns3
 
#endif /* CHANNEL_CONDITION_MODEL_H */