A Discrete-Event Network Simulator
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2 /*
3  * Copyright (c) 2016 ResiliNets, ITTC, University of Kansas
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18  * Author: Truc Anh N. Nguyen <annguyen@ittc.ku.edu>
19  *
20  * James P.G. Sterbenz <jpgs@ittc.ku.edu>, director
21  * ResiliNets Research Group http://wiki.ittc.ku.edu/resilinets
22  * Information and Telecommunication Technology Center (ITTC)
23  * and Department of Electrical Engineering and Computer Science
24  * The University of Kansas Lawrence, KS USA.
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27 #ifndef TCPYEAH_H
28 #define TCPYEAH_H
30 #include "ns3/tcp-congestion-ops.h"
31 #include "ns3/tcp-scalable.h"
33 namespace ns3 {
72 class TcpYeah : public TcpNewReno
73 {
74 public:
79  static TypeId GetTypeId (void);
84  TcpYeah (void);
90  TcpYeah (const TcpYeah& sock);
91  virtual ~TcpYeah (void);
93  virtual std::string GetName () const;
110  virtual void PktsAcked (Ptr<TcpSocketState> tcb, uint32_t segmentsAcked,
111  const Time& rtt);
121  virtual void CongestionStateSet (Ptr<TcpSocketState> tcb,
122  const TcpSocketState::TcpCongState_t newState);
130  virtual void IncreaseWindow (Ptr<TcpSocketState> tcb, uint32_t segmentsAcked);
140  virtual uint32_t GetSsThresh (Ptr<const TcpSocketState> tcb,
141  uint32_t bytesInFlight);
143  virtual Ptr<TcpCongestionOps> Fork ();
145 protected:
146 private:
158  void EnableYeah (const SequenceNumber32 &nextTxSequence);
163  void DisableYeah ();
165 private:
166  uint32_t m_alpha;
167  uint32_t m_gamma;
168  uint32_t m_delta;
169  uint32_t m_epsilon;
170  uint32_t m_phy;
171  uint32_t m_rho;
172  uint32_t m_zeta;
174  uint32_t m_stcpAiFactor;
178  uint32_t m_cntRtt;
181  uint32_t m_lastQ;
182  uint32_t m_doingRenoNow;
183  uint32_t m_renoCount;
184  uint32_t m_fastCount;
185 };
187 } // namespace ns3
189 #endif // TCPYEAH_H
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:102
uint32_t m_stcpAiFactor
STCP additive increase parameter.
Definition: tcp-yeah.h:174
Create an unbound tcp socket.
Definition: tcp-yeah.cc:80
uint32_t m_fastCount
Number of RTTs in "Fast" mode.
Definition: tcp-yeah.h:184
virtual void CongestionStateSet(Ptr< TcpSocketState > tcb, const TcpSocketState::TcpCongState_t newState)
Enable/disable YeAH algorithm depending on the congestion state.
Definition: tcp-yeah.cc:183
uint32_t m_epsilon
Log maximum fraction to be removed on early decongestion.
Definition: tcp-yeah.h:169
void DisableYeah()
Stop taking YeAH samples.
Definition: tcp-yeah.cc:175
uint32_t m_delta
Log minimum fraction of cwnd to be removed on loss.
Definition: tcp-yeah.h:168
The NewReno implementation.
uint32_t m_gamma
Fraction of queue to be removed per RTT when precautionary decongestion executed. ...
Definition: tcp-yeah.h:167
virtual void PktsAcked(Ptr< TcpSocketState > tcb, uint32_t segmentsAcked, const Time &rtt)
Compute RTTs needed to execute YeAH algorithm.
Definition: tcp-yeah.cc:142
Time m_minRtt
Minimum of all RTTs measured within last RTT.
Definition: tcp-yeah.h:177
An implementation of TCP YeAH.
Definition: tcp-yeah.h:72
uint32_t m_cntRtt
Number of RTT measurements during last RTT.
Definition: tcp-yeah.h:178
uint32_t m_phy
Maximum delta from base.
Definition: tcp-yeah.h:170
virtual std::string GetName() const
Get the name of the congestion control algorithm.
Definition: tcp-yeah.cc:311
uint32_t m_renoCount
Estimated cwnd of competing Reno flow.
Definition: tcp-yeah.h:183
Definition of the Congestion state machine.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
void EnableYeah(const SequenceNumber32 &nextTxSequence)
Enable YeAH algorithm to start taking YeAH samples.
Definition: tcp-yeah.cc:164
uint32_t m_lastQ
Last number of packets in the bottleneck queue.
Definition: tcp-yeah.h:181
Time m_baseRtt
Minimum of all YeAH RTT measurements seen during connection.
Definition: tcp-yeah.h:176
virtual Ptr< TcpCongestionOps > Fork()
Copy the congestion control algorithm across socket.
Definition: tcp-yeah.cc:136
uint32_t m_rho
Minimum number of consecutive RTT to consider competition with Reno flows on loss.
Definition: tcp-yeah.h:171
virtual void IncreaseWindow(Ptr< TcpSocketState > tcb, uint32_t segmentsAcked)
Adjust cwnd following YeAH dual-mode algorithm.
Definition: tcp-yeah.cc:199
bool m_doingYeahNow
If true, do YeAH for this RTT.
Definition: tcp-yeah.h:179
uint32_t m_zeta
Minimum number of state switches to reset m_renoCount.
Definition: tcp-yeah.h:172
Ptr< TcpScalable > m_stcp
TcpScalable object.
Definition: tcp-yeah.h:175
static TypeId GetTypeId(void)
Get the type ID.
Definition: tcp-yeah.cc:38
SequenceNumber32 m_begSndNxt
Right edge during last RTT.
Definition: tcp-yeah.h:180
a unique identifier for an interface.
Definition: type-id.h:58
uint32_t m_alpha
Maximum backlog allowed at the bottleneck queue; Q_max in the paper.
Definition: tcp-yeah.h:166
uint32_t m_doingRenoNow
Number of RTTs in "Slow" mode.
Definition: tcp-yeah.h:182
virtual ~TcpYeah(void)
Definition: tcp-yeah.cc:130
virtual uint32_t GetSsThresh(Ptr< const TcpSocketState > tcb, uint32_t bytesInFlight)
Get slow start threshold upon the receipt of 3 dupACKs.
Definition: tcp-yeah.cc:317