A Discrete-Event Network Simulator
API
tcp-westwood.h
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3  * Copyright (c) 2013 ResiliNets, ITTC, University of Kansas
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18  * Authors: Siddharth Gangadhar <siddharth@ittc.ku.edu>, Truc Anh N. Nguyen <annguyen@ittc.ku.edu>,
19  * and Greeshma Umapathi
20  *
21  * James P.G. Sterbenz <jpgs@ittc.ku.edu>, director
22  * ResiliNets Research Group http://wiki.ittc.ku.edu/resilinets
23  * Information and Telecommunication Technology Center (ITTC)
24  * and Department of Electrical Engineering and Computer Science
25  * The University of Kansas Lawrence, KS USA.
26  *
27  * Work supported in part by NSF FIND (Future Internet Design) Program
28  * under grant CNS-0626918 (Postmodern Internet Architecture),
29  * NSF grant CNS-1050226 (Multilayer Network Resilience Analysis and Experimentation on GENI),
30  * US Department of Defense (DoD), and ITTC at The University of Kansas.
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32 
33 #ifndef TCP_WESTWOOD_H
34 #define TCP_WESTWOOD_H
35 
36 #include "tcp-congestion-ops.h"
37 #include "ns3/tcp-recovery-ops.h"
38 #include "ns3/sequence-number.h"
39 #include "ns3/traced-value.h"
40 #include "ns3/event-id.h"
41 
42 namespace ns3 {
43 
44 class Packet;
45 class TcpHeader;
46 class Time;
47 class EventId;
48 
67 class TcpWestwood : public TcpNewReno
68 {
69 public:
74  static TypeId GetTypeId (void);
75 
76  TcpWestwood (void);
81  TcpWestwood (const TcpWestwood& sock);
82  virtual ~TcpWestwood (void);
83 
88  {
91  };
92 
96  enum FilterType
97  {
100  };
101 
102  virtual uint32_t GetSsThresh (Ptr<const TcpSocketState> tcb,
103  uint32_t bytesInFlight);
104 
105  virtual void PktsAcked (Ptr<TcpSocketState> tcb, uint32_t packetsAcked,
106  const Time& rtt);
107 
108  virtual Ptr<TcpCongestionOps> Fork ();
109 
110 private:
116  void UpdateAckedSegments (int acked);
117 
124  void EstimateBW (const Time& rtt, Ptr<TcpSocketState> tcb);
125 
126 protected:
128  double m_lastSampleBW;
129  double m_lastBW;
132 
133  uint32_t m_ackedSegments;
134  bool m_IsCount;
136 
137 };
138 
139 } // namespace ns3
140 
141 #endif /* TCP_WESTWOOD_H */
EventId m_bwEstimateEvent
The BW estimation event for Westwood+.
Definition: tcp-westwood.h:135
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:103
Smart pointer class similar to boost::intrusive_ptr.
Definition: ptr.h:73
double m_lastBW
Last bandwidth sample after being filtered.
Definition: tcp-westwood.h:129
void(* Time)(Time oldValue, Time newValue)
TracedValue callback signature for Time.
Definition: nstime.h:813
The NewReno implementation.
virtual void PktsAcked(Ptr< TcpSocketState > tcb, uint32_t packetsAcked, const Time &rtt)
Timing information on received ACK.
Definition: tcp-westwood.cc:96
enum FilterType m_fType
0 for none, 1 for Tustin
Definition: tcp-westwood.h:131
void UpdateAckedSegments(int acked)
Update the total number of acknowledged packets during the current RTT.
ProtocolType
Protocol variant (Westwood or Westwood+)
Definition: tcp-westwood.h:87
Every class exported by the ns3 library is enclosed in the ns3 namespace.
static TypeId GetTypeId(void)
Get the type ID.
Definition: tcp-westwood.cc:47
virtual uint32_t GetSsThresh(Ptr< const TcpSocketState > tcb, uint32_t bytesInFlight)
Get the slow start threshold after a loss event.
FilterType
Filter type (None or Tustin)
Definition: tcp-westwood.h:96
virtual ~TcpWestwood(void)
Definition: tcp-westwood.cc:91
An identifier for simulation events.
Definition: event-id.h:53
virtual Ptr< TcpCongestionOps > Fork()
Copy the congestion control algorithm across sockets.
double m_lastSampleBW
Last bandwidth sample.
Definition: tcp-westwood.h:128
void EstimateBW(const Time &rtt, Ptr< TcpSocketState > tcb)
Estimate the network&#39;s bandwidth.
TracedValue< double > m_currentBW
Current value of the estimated BW.
Definition: tcp-westwood.h:127
bool m_IsCount
Start keeping track of m_ackedSegments for Westwood+ if TRUE.
Definition: tcp-westwood.h:134
a unique identifier for an interface.
Definition: type-id.h:58
uint32_t m_ackedSegments
The number of segments ACKed between RTTs.
Definition: tcp-westwood.h:133
An implementation of TCP Westwood and Westwood+.
Definition: tcp-westwood.h:67
enum ProtocolType m_pType
0 for Westwood, 1 for Westwood+
Definition: tcp-westwood.h:130