/usr/include/ns3.27/ns3/tcp-hybla.h is in libns3-dev 3.27+dfsg-1.
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/*
* Copyright (c) 2014 Natale Patriciello <natale.patriciello@gmail.com>
*
* 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 TCPHYBLA_H
#define TCPHYBLA_H
#include "ns3/tcp-congestion-ops.h"
#include "ns3/traced-value.h"
namespace ns3 {
/**
* \ingroup congestionOps
*
* \brief Implementation of the TCP Hybla algorithm
*
* The key idea behind TCP Hybla is to obtain for long RTT connections the same
* instantaneous transmission rate of a reference TCP connection with lower RTT.
* With analytical steps, it is shown that this goal can be achieved by
* modifying the time scale, in order for the throughput to be independent from
* the RTT. This independence is obtained through the use of a coefficient rho.
*
* This coefficient is used to calculate both the slow start threshold
* and the congestion window when in slow start and in congestion avoidance,
* respectively.
*
* More information: http://dl.acm.org/citation.cfm?id=2756518
*/
class TcpHybla : public TcpNewReno
{
public:
/**
* \brief Get the type ID.
* \return the object TypeId
*/
static TypeId GetTypeId (void);
/**
* Create an unbound tcp socket.
*/
TcpHybla (void);
/**
* \brief Copy constructor
* \param sock the object to copy
*/
TcpHybla (const TcpHybla& sock);
virtual ~TcpHybla (void);
virtual void PktsAcked (Ptr<TcpSocketState> tcb, uint32_t segmentsAcked,
const Time& rtt);
virtual std::string GetName () const;
virtual Ptr<TcpCongestionOps> Fork ();
protected:
virtual uint32_t SlowStart (Ptr<TcpSocketState> tcb, uint32_t segmentsAcked);
virtual void CongestionAvoidance (Ptr<TcpSocketState> tcb, uint32_t segmentsAcked);
private:
TracedValue<double> m_rho; //!< Rho parameter
Time m_minRtt; //!< Minimum smoothed round trip time value seen
Time m_rRtt; //!< Reference RTT
double m_cWndCnt; //!< cWnd integer-to-float counter
private:
/**
* \brief Recalculate algorithm parameters
* \param tcb the socket state.
* \param rtt the round trip time.
*/
void RecalcParam (Ptr<TcpSocketState> tcb, const Time& rtt);
};
} // namespace ns3
#endif // TCPHYBLA_H
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