A Discrete-Event Network Simulator
API
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Groups Pages
Public Member Functions | Static Public Member Functions | Private Types | Private Member Functions | Private Attributes | List of all members
ns3::IdealWifiManager Class Reference
Wifi Models

Ideal rate control algorithmThis class implements an 'ideal' rate control algorithm similar to RBAR in spirit (see A rate-adaptive MAC protocol for multihop wireless networks by G. Holland, N. Vaidya, and P. Bahl.): every station keeps track of the snr of every packet received and sends back this snr to the original transmitter by an out-of-band mechanism. Each transmitter keeps track of the last snr sent back by a receiver and uses it to pick a transmission mode based on a set of snr thresholds built from a target ber and transmission mode-specific snr/ber curves. More...

#include <ideal-wifi-manager.h>

+ Inheritance diagram for ns3::IdealWifiManager:

Public Member Functions

virtual void SetupPhy (Ptr< WifiPhy > phy)
 
- Public Member Functions inherited from ns3::WifiRemoteStationManager
void AddBasicMode (WifiMode mode)
 
void AddSupportedMode (Mac48Address address, WifiMode mode)
 
WifiMode GetAckMode (Mac48Address address, WifiMode dataMode)
 
WifiMode GetBasicMode (uint32_t i) const
 
WifiMode GetCtsMode (Mac48Address address, WifiMode rtsMode)
 
WifiMode GetDataMode (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fullPacketSize)
 
WifiMode GetDefaultMode (void) const
 
uint32_t GetFragmentationThreshold (void) const
 
uint32_t GetFragmentOffset (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fragmentNumber)
 
uint32_t GetFragmentSize (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fragmentNumber)
 
WifiRemoteStationInfo GetInfo (Mac48Address address)
 
uint32_t GetMaxSlrc (void) const
 
uint32_t GetMaxSsrc (void) const
 
uint32_t GetNBasicModes (void) const
 
WifiMode GetNonUnicastMode (void) const
 
uint32_t GetRtsCtsThreshold (void) const
 
WifiMode GetRtsMode (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
 
bool IsAssociated (Mac48Address address) const
 
bool IsBrandNew (Mac48Address address) const
 
bool IsLastFragment (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fragmentNumber)
 
bool IsWaitAssocTxOk (Mac48Address address) const
 
bool NeedDataRetransmission (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
 
bool NeedFragmentation (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
 
bool NeedRts (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
 
bool NeedRtsRetransmission (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet)
 
void PrepareForQueue (Mac48Address address, const WifiMacHeader *header, Ptr< const Packet > packet, uint32_t fullPacketSize)
 
void RecordDisassociated (Mac48Address address)
 
void RecordGotAssocTxFailed (Mac48Address address)
 
void RecordGotAssocTxOk (Mac48Address address)
 
void RecordWaitAssocTxOk (Mac48Address address)
 
void ReportDataFailed (Mac48Address address, const WifiMacHeader *header)
 
void ReportDataOk (Mac48Address address, const WifiMacHeader *header, double ackSnr, WifiMode ackMode, double dataSnr)
 
void ReportFinalDataFailed (Mac48Address address, const WifiMacHeader *header)
 
void ReportFinalRtsFailed (Mac48Address address, const WifiMacHeader *header)
 
void ReportRtsFailed (Mac48Address address, const WifiMacHeader *header)
 
void ReportRtsOk (Mac48Address address, const WifiMacHeader *header, double ctsSnr, WifiMode ctsMode, double rtsSnr)
 
void ReportRxOk (Mac48Address address, const WifiMacHeader *header, double rxSnr, WifiMode txMode)
 
void Reset (void)
 
void Reset (Mac48Address address)
 
void SetFragmentationThreshold (uint32_t threshold)
 
void SetMaxSlrc (uint32_t maxSlrc)
 
void SetMaxSsrc (uint32_t maxSsrc)
 
void SetRtsCtsThreshold (uint32_t threshold)
 
- Public Member Functions inherited from ns3::Object
void AggregateObject (Ptr< Object > other)
 
void Dispose (void)
 
AggregateIterator GetAggregateIterator (void) const
 
virtual TypeId GetInstanceTypeId (void) const
 
template<typename T >
Ptr< T > GetObject (void) const
 
template<typename T >
Ptr< T > GetObject (TypeId tid) const
 
void Initialize (void)
 
- Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
 SimpleRefCount (const SimpleRefCount &o)
 
uint32_t GetReferenceCount (void) const
 
SimpleRefCount & operator= (const SimpleRefCount &o)
 
void Ref (void) const
 
void Unref (void) const
 
- Public Member Functions inherited from ns3::ObjectBase
void GetAttribute (std::string name, AttributeValue &value) const
 
bool GetAttributeFailSafe (std::string name, AttributeValue &attribute) const
 
void SetAttribute (std::string name, const AttributeValue &value)
 
bool SetAttributeFailSafe (std::string name, const AttributeValue &value)
 
bool TraceConnect (std::string name, std::string context, const CallbackBase &cb)
 
bool TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
 
bool TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
 
bool TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
 

Static Public Member Functions

static TypeId GetTypeId (void)
 
- Static Public Member Functions inherited from ns3::WifiRemoteStationManager
static TypeId GetTypeId (void)
 
- Static Public Member Functions inherited from ns3::Object
static TypeId GetTypeId (void)
 
- Static Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
static void Cleanup (void)
 
- Static Public Member Functions inherited from ns3::ObjectBase
static TypeId GetTypeId (void)
 

Private Types

typedef std::vector< std::pair
< double, WifiMode > > 		Thresholds
 

Private Member Functions

void AddModeSnrThreshold (WifiMode mode, double ber)
 
virtual WifiRemoteStation * DoCreateStation (void) const
 
virtual WifiMode DoGetDataMode (WifiRemoteStation *station, uint32_t size)
 
virtual WifiMode DoGetRtsMode (WifiRemoteStation *station)
 
virtual void DoReportDataFailed (WifiRemoteStation *station)
 
virtual void DoReportDataOk (WifiRemoteStation *station, double ackSnr, WifiMode ackMode, double dataSnr)
 
virtual void DoReportFinalDataFailed (WifiRemoteStation *station)
 
virtual void DoReportFinalRtsFailed (WifiRemoteStation *station)
 
virtual void DoReportRtsFailed (WifiRemoteStation *station)
 
virtual void DoReportRtsOk (WifiRemoteStation *station, double ctsSnr, WifiMode ctsMode, double rtsSnr)
 
virtual void DoReportRxOk (WifiRemoteStation *station, double rxSnr, WifiMode txMode)
 
double GetSnrThreshold (WifiMode mode) const
 
virtual bool IsLowLatency (void) const
 

Private Attributes

double m_ber
 
double m_maxSnr
 
double m_minSnr
 
Thresholds m_thresholds
 

Additional Inherited Members

- Protected Member Functions inherited from ns3::WifiRemoteStationManager
virtual void DoDispose (void)
 
uint32_t GetNSupported (const WifiRemoteStation *station) const
 
WifiMode GetSupported (const WifiRemoteStation *station, uint32_t i) const
 
- Protected Member Functions inherited from ns3::Object
 Object (const Object &o)
 
virtual void DoInitialize (void)
 
virtual void NotifyNewAggregate (void)
 
- Protected Member Functions inherited from ns3::ObjectBase
void ConstructSelf (const AttributeConstructionList &attributes)
 
virtual void NotifyConstructionCompleted (void)
 

Detailed Description

Ideal rate control algorithm

This class implements an 'ideal' rate control algorithm similar to RBAR in spirit (see A rate-adaptive MAC protocol for multihop wireless networks by G. Holland, N. Vaidya, and P. Bahl.): every station keeps track of the snr of every packet received and sends back this snr to the original transmitter by an out-of-band mechanism. Each transmitter keeps track of the last snr sent back by a receiver and uses it to pick a transmission mode based on a set of snr thresholds built from a target ber and transmission mode-specific snr/ber curves.

Config Paths

ns3::IdealWifiManager is accessible through the following paths with Config::Set and Config::Connect:

  • /NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/RemoteStationManager/$ns3::IdealWifiManager

Attributes

  • BerThreshold: The maximum Bit Error Rate acceptable at any transmission mode
    • Set with class: ns3::DoubleValue
    • Underlying type: double -1.79769e+308:1.79769e+308
    • Initial value: 1e-05
    • Flags: construct write read

Attributes defined in parent class ns3::WifiRemoteStationManager

  • IsLowLatency: If true, we attempt to modelize a so-called low-latency device: a device where decisions about tx parameters can be made on a per-packet basis and feedback about the transmission of each packet is obtained before sending the next. Otherwise, we modelize a high-latency device, that is a device where we cannot update our decision about tx parameters after every packet transmission.
  • MaxSsrc: The maximum number of retransmission attempts for an RTS. This value will not have any effect on some rate control algorithms.
  • MaxSlrc: The maximum number of retransmission attempts for a DATA packet. This value will not have any effect on some rate control algorithms.
  • RtsCtsThreshold: If the size of the data packet + LLC header + MAC header + FCS trailer is bigger than this value, we use an RTS/CTS handshake before sending the data, as per IEEE Std. 802.11-2007, Section 9.2.6. This value will not have any effect on some rate control algorithms.
  • FragmentationThreshold: If the size of the data packet + LLC header + MAC header + FCS trailer is biggerthan this value, we fragment it such that the size of the fragments are equal or smaller than this value, as per IEEE Std. 802.11-2007, Section 9.4. This value will not have any effect on some rate control algorithms.
  • NonUnicastMode: Wifi mode used for non-unicast transmissions.
    • Set with class: WifiModeValue
    • Underlying type: WifiMode
    • Initial value: Invalid-WifiMode
    • Flags: construct write read

No TraceSources are defined for this type.

TraceSources defined in parent class ns3::WifiRemoteStationManager

  • MacTxRtsFailed: The transmission of a RTS by the MAC layer has failed
  • MacTxDataFailed: The transmission of a data packet by the MAC layer has failed
  • MacTxFinalRtsFailed: The transmission of a RTS has exceeded the maximum number of attempts
  • MacTxFinalDataFailed: The transmission of a data packet has exceeded the maximum number of attempts

Definition at line 45 of file ideal-wifi-manager.h.

Member Function Documentation

WifiRemoteStation * ns3::IdealWifiManager::DoCreateStation ( void  ) const
privatevirtual
Returns
a new station data structure

Implements ns3::WifiRemoteStationManager.

Definition at line 92 of file ideal-wifi-manager.cc.

WifiMode ns3::IdealWifiManager::DoGetDataMode ( WifiRemoteStation *  station,
uint32_t  size 
)
privatevirtual
Parameters
stationthe station with which we need to communicate
sizesize of the packet or fragment we want to send
Returns
the transmission mode to use to send a packet to the station

Note: This method is called before sending a unicast packet or a fragment of a unicast packet to decide which transmission mode to use.

Implements ns3::WifiRemoteStationManager.

Definition at line 137 of file ideal-wifi-manager.cc.

WifiMode ns3::IdealWifiManager::DoGetRtsMode ( WifiRemoteStation *  station)
privatevirtual
Parameters
stationthe station with which we need to communicate
Returns
the transmission mode to use to send an rts to the station

Note: This method is called before sending an rts to a station to decide which transmission mode to use for the rts.

Implements ns3::WifiRemoteStationManager.

Definition at line 159 of file ideal-wifi-manager.cc.

bool ns3::IdealWifiManager::IsLowLatency ( void  ) const
privatevirtual
Returns
whether this manager is a manager designed to work in low-latency environments.

Note: In this context, low vs high latency is defined in IEEE 802.11 Rate Adaptation: A Practical Approach, by M. Lacage, M.H. Manshaei, and T. Turletti.

Implements ns3::WifiRemoteStationManager.

Definition at line 182 of file ideal-wifi-manager.cc.

The documentation for this class was generated from the following files: