traffic-generator-ngmn-voip.h

// Copyright (c) 2022 CTTC
// Copyright (c) 2023 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
//
// SPDX-License-Identifier: GPL-2.0-only
 
#ifndef TRAFFIC_GENERATOR_NGMN_VOIP
#define TRAFFIC_GENERATOR_NGMN_VOIP
 
#include "traffic-generator.h"
 
#include "ns3/random-variable-stream.h"
 
namespace ns3
{
 
class Address;
class Socket;
 
class TrafficGeneratorNgmnVoip : public TrafficGenerator
{
  public:
    static TypeId GetTypeId();
 
    TrafficGeneratorNgmnVoip();
 
    ~TrafficGeneratorNgmnVoip() override;
 
    enum VoipState
    {
        INACTIVE_STATE,
        ACTIVE_STATE
    };
 
    int64_t AssignStreams(int64_t stream) override;
 
  protected:
    void DoDispose() override;
    void DoInitialize() override;
 
  private:
    /*
     * @brief Inherited from Application base class.
     *  In its implementation it calculates the transition probabilities between
     *  active and inactive VOIP states
     *  // Called at time specified by Start by the DoInitialize method
     */
    void StartApplication() override;
    void StopApplication() override;
 
    /*
     * @brief Updates the model state (ACTIVE/INACTIVE).
     * The model is assumed updated at the speech encoder frame rate R=1/T,
     * where T is the encoder frame duration (typically, 20ms)
     */
    void UpdateState();
 
    void GenerateNextPacketBurstSize() override;
 
    uint32_t GetNextPacketSize() const override;
 
    Time GetNextPacketTime() const override;
 
    Ptr<UniformRandomVariable> m_fromActiveToInactive;
    Ptr<UniformRandomVariable> m_fromInactiveToActive;
 
    uint32_t m_encoderFrameLength{0};    
    uint32_t m_meanTalkSpurtDuration{0}; 
    double m_voiceActivityFactor{0.0};   
    uint32_t m_activePayload{0};         
    uint32_t m_SIDPeriodicity{0};        
    uint32_t m_SIDPayload{0};            
    VoipState m_state{INACTIVE_STATE};   
    EventId m_updateState;               
    double m_a{0.0}; 
    double m_c{0.0}; 
};
 
} // namespace ns3
 
#endif /* TRAFFIC_GENERATOR_NGMN_VOIP */