ns3::DcfManager Class Reference

#include <dcf-manager.h>

Collaboration diagram for ns3::DcfManager:

List of all members.

Public Member Functions

void SetSlot (Time slotTime)

void SetSifs (Time sifs)

void SetEifsNoDifs (Time eifsNoDifs)

Time GetEifsNoDifs () const

void Add (DcfState *dcf)

void RequestAccess (DcfState *state)

void NotifyRxStartNow (Time duration)

void NotifyRxEndOkNow (void)

void NotifyRxEndErrorNow (void)

void NotifyTxStartNow (Time duration)

void NotifyMaybeCcaBusyStartNow (Time duration)

void NotifyNavResetNow (Time duration)

void NotifyNavStartNow (Time duration)

Private Member Functions

Time GetAccessGrantStart (void) const

Detailed Description

Manage a set of ns3::DcfState.

Handle a set of independent ns3::DcfState, each of which represents a single DCF within a MAC stack. Each ns3::DcfState has a priority implicitely associated with it (the priority is determined when the ns3::DcfState is added to the DcfManager: the first DcfState to be added gets the highest priority, the second, the second highest priority, and so on.) which is used to handle "internal" collisions. i.e., when two local DcfState are expected to get access to the medium at the same time, the highest priority local DcfState wins access to the medium and the other DcfState suffers a "internal" collision.

Member Function Documentation

void ns3::DcfManager::Add ( DcfState * dcf )

Parameters:

dcf

a new DcfState.

The DcfManager does not take ownership of this pointer so, the callee must make sure that the DcfState pointer will stay valid as long as the DcfManager is valid. Note that the order in which DcfState objects are added to a DcfManager matters: the first DcfState added has the highest priority, the second DcfState added, has the second highest priority, etc.

Time ns3::DcfManager::GetAccessGrantStart ( void ) const [private]

Access will never be granted to the medium _before_ the time returned by this method.

Returns:: the absolute time at which access could start to be granted

Time ns3::DcfManager::GetEifsNoDifs ( ) const

Returns:: value set previously using SetEifsNoDifs.

void ns3::DcfManager::NotifyMaybeCcaBusyStartNow ( Time duration )

Parameters:

duration

expected duration of cca busy period

Notify the DCF that a CCA busy period has just started.

void ns3::DcfManager::NotifyNavResetNow ( Time duration )

Parameters:

duration

the value of the received NAV.

Called at end of rx

void ns3::DcfManager::NotifyNavStartNow ( Time duration )

Parameters:

duration

the value of the received NAV.

Called at end of rx

void ns3::DcfManager::NotifyRxEndErrorNow ( void )

Notify the DCF that a packet reception was just completed unsuccessfully.

void ns3::DcfManager::NotifyRxEndOkNow ( void )

Notify the DCF that a packet reception was just completed successfully.

void ns3::DcfManager::NotifyRxStartNow ( Time duration )

Parameters:

duration

expected duration of reception

Notify the DCF that a packet reception started for the expected duration.

void ns3::DcfManager::NotifyTxStartNow ( Time duration )

Parameters:

duration

expected duration of transmission

Notify the DCF that a packet transmission was just started and is expected to last for the specified duration.

void ns3::DcfManager::RequestAccess ( DcfState * state )

Parameters:

state

a DcfState

Notify the DcfManager that a specific DcfState needs access to the medium. The DcfManager is then responsible for starting an access timer and, invoking DcfState::DoNotifyAccessGranted when the access is granted if it ever gets granted.

void ns3::DcfManager::SetEifsNoDifs ( Time eifsNoDifs )

Parameters:

eifsNoDifs

the duration of a EIFS minus the duration of DIFS.

It is a bad idea to call this method after RequestAccess or one of the Notify methods has been invoked.

void ns3::DcfManager::SetSifs ( Time sifs )

Parameters:

sifs

the duration of a SIFS.

It is a bad idea to call this method after RequestAccess or one of the Notify methods has been invoked.

void ns3::DcfManager::SetSlot ( Time slotTime )

Parameters:

slotTime

the duration of a slot.

It is a bad idea to call this method after RequestAccess or one of the Notify methods has been invoked.

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

src/devices/wifi/dcf-manager.h


Public Member Functions
void	SetSlot (Time slotTime)
void	SetSifs (Time sifs)
void	SetEifsNoDifs (Time eifsNoDifs)
Time	GetEifsNoDifs () const
void	Add (DcfState *dcf)
void	RequestAccess (DcfState *state)
void	NotifyRxStartNow (Time duration)
void	NotifyRxEndOkNow (void)
void	NotifyRxEndErrorNow (void)
void	NotifyTxStartNow (Time duration)
void	NotifyMaybeCcaBusyStartNow (Time duration)
void	NotifyNavResetNow (Time duration)
void	NotifyNavStartNow (Time duration)
Private Member Functions
Time	GetAccessGrantStart (void) const