A Discrete-Event Network Simulator
API
ns3::LrWpanCsmaCa Class Reference

This class is a helper for the LrWpanMac to manage the Csma/CA state machine according to IEEE 802.15.4-2006, section 7.5.1.4. More...

#include "lr-wpan-csmaca.h"

+ Inheritance diagram for ns3::LrWpanCsmaCa:
+ Collaboration diagram for ns3::LrWpanCsmaCa:

Public Member Functions

 LrWpanCsmaCa (const LrWpanCsmaCa &)=delete
 
 LrWpanCsmaCa (void)
 Default constructor. More...
 
virtual ~LrWpanCsmaCa (void)
 
int64_t AssignStreams (int64_t stream)
 Assign a fixed random variable stream number to the random variables used by this model. More...
 
void Cancel (void)
 Cancel CSMA-CA algorithm. More...
 
void CanProceed (void)
 In the slotted CSMA-CA, after random backoff, determine if the remaining CSMA-CA operation can proceed, i.e. More...
 
void DeferCsmaTimeout (void)
 The CSMA algorithm call this function at the end of the CAP to return the MAC state back to to IDLE after a transmission was deferred due to the lack of time in the CAP. More...
 
bool GetBatteryLifeExtension (void)
 Get the value of the Battery Life Extension. More...
 
Ptr< LrWpanMacGetMac (void) const
 Get the MAC to which this CSMA/CA implementation is attached to. More...
 
uint8_t GetMacMaxBE (void) const
 Get the maximum backoff exponent value. More...
 
uint8_t GetMacMaxCSMABackoffs (void) const
 Get the maximum number of backoffs. More...
 
uint8_t GetMacMinBE (void) const
 Get the minimum backoff exponent value. More...
 
uint8_t GetNB (void)
 Get the number of CSMA retries. More...
 
Time GetTimeToNextSlot (void) const
 Locates the time to the next backoff period boundary in the SUPERFRAME and returns the amount of time left to this moment. More...
 
uint64_t GetUnitBackoffPeriod (void) const
 Get the number of symbols forming the basic time period used by the CSMA-CA algorithm. More...
 
bool IsSlottedCsmaCa (void) const
 Check if the slotted CSMA/CA version is being used. More...
 
bool IsUnSlottedCsmaCa (void) const
 Check if the unslotted CSMA/CA version is being used. More...
 
LrWpanCsmaCaoperator= (const LrWpanCsmaCa &)=delete
 
void PlmeCcaConfirm (LrWpanPhyEnumeration status)
 IEEE 802.15.4-2006 section 6.2.2.2 PLME-CCA.confirm status. More...
 
void RandomBackoffDelay (void)
 In step 2 of the CSMA-CA, perform a random backoff in the range of 0 to 2^BE -1. More...
 
void RequestCCA (void)
 Request the Phy to perform CCA (Step 3) More...
 
void SetBatteryLifeExtension (bool batteryLifeExtension)
 Set the value of the Battery Life Extension. More...
 
void SetLrWpanMacStateCallback (LrWpanMacStateCallback macState)
 Set the callback function to the MAC. More...
 
void SetLrWpanMacTransCostCallback (LrWpanMacTransCostCallback trans)
 Set the callback function to report a transaction cost in slotted CSMA-CA. More...
 
void SetMac (Ptr< LrWpanMac > mac)
 Set the MAC to which this CSMA/CA implementation is attached to. More...
 
void SetMacMaxBE (uint8_t macMaxBE)
 Set the maximum backoff exponent value. More...
 
void SetMacMaxCSMABackoffs (uint8_t macMaxCSMABackoffs)
 Set the maximum number of backoffs. More...
 
void SetMacMinBE (uint8_t macMinBE)
 Set the minimum backoff exponent value. More...
 
void SetSlottedCsmaCa (void)
 Configure for the use of the slotted CSMA/CA version. More...
 
void SetUnitBackoffPeriod (uint64_t unitBackoffPeriod)
 Set the number of symbols forming the basic time period used by the CSMA-CA algorithm. More...
 
void SetUnSlottedCsmaCa (void)
 Configure for the use of the unslotted CSMA/CA version. More...
 
void Start (void)
 Start CSMA-CA algorithm (step 1), initialize NB, BE for both slotted and unslotted CSMA-CA. More...
 
- Public Member Functions inherited from ns3::Object
 Object ()
 Constructor. More...
 
virtual ~Object ()
 Destructor. More...
 
void AggregateObject (Ptr< Object > other)
 Aggregate two Objects together. More...
 
void Dispose (void)
 Dispose of this Object. More...
 
AggregateIterator GetAggregateIterator (void) const
 Get an iterator to the Objects aggregated to this one. More...
 
virtual TypeId GetInstanceTypeId (void) const
 Get the most derived TypeId for this Object. More...
 
template<>
Ptr< ObjectGetObject () const
 Specialization of () for objects of type ns3::Object. More...
 
template<typename T >
Ptr< T > GetObject (TypeId tid) const
 Get a pointer to the requested aggregated Object by TypeId. More...
 
template<>
Ptr< ObjectGetObject (TypeId tid) const
 Specialization of (TypeId tid) for objects of type ns3::Object. More...
 
template<typename T >
Ptr< T > GetObject (void) const
 Get a pointer to the requested aggregated Object. More...
 
void Initialize (void)
 Invoke DoInitialize on all Objects aggregated to this one. More...
 
bool IsInitialized (void) const
 Check if the object has been initialized. More...
 
- Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
 SimpleRefCount ()
 Default constructor. More...
 
 SimpleRefCount (const SimpleRefCount &o)
 Copy constructor. More...
 
uint32_t GetReferenceCount (void) const
 Get the reference count of the object. More...
 
SimpleRefCountoperator= (const SimpleRefCount &o)
 Assignment operator. More...
 
void Ref (void) const
 Increment the reference count. More...
 
void Unref (void) const
 Decrement the reference count. More...
 
- Public Member Functions inherited from ns3::ObjectBase
virtual ~ObjectBase ()
 Virtual destructor. More...
 
void GetAttribute (std::string name, AttributeValue &value) const
 Get the value of an attribute, raising fatal errors if unsuccessful. More...
 
bool GetAttributeFailSafe (std::string name, AttributeValue &value) const
 Get the value of an attribute without raising erros. More...
 
virtual TypeId GetInstanceTypeId (void) const =0
 Get the most derived TypeId for this Object. More...
 
void SetAttribute (std::string name, const AttributeValue &value)
 Set a single attribute, raising fatal errors if unsuccessful. More...
 
bool SetAttributeFailSafe (std::string name, const AttributeValue &value)
 Set a single attribute without raising errors. More...
 
bool TraceConnect (std::string name, std::string context, const CallbackBase &cb)
 Connect a TraceSource to a Callback with a context. More...
 
bool TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
 Connect a TraceSource to a Callback without a context. More...
 
bool TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
 Disconnect from a TraceSource a Callback previously connected with a context. More...
 
bool TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
 Disconnect from a TraceSource a Callback previously connected without a context. More...
 

Static Public Member Functions

static TypeId GetTypeId (void)
 Get the type ID. More...
 
- Static Public Member Functions inherited from ns3::Object
static TypeId GetTypeId (void)
 Register this type. More...
 
- Static Public Member Functions inherited from ns3::ObjectBase
static TypeId GetTypeId (void)
 Get the type ID. More...
 

Private Member Functions

virtual void DoDispose (void)
 Destructor implementation. More...
 
Time GetTimeLeftInCap ()
 Get the time left in the CAP portion of the Outgoing or Incoming superframe. More...
 

Private Attributes

uint64_t m_aUnitBackoffPeriod
 Number of symbols per CSMA/CA time unit, default 20 symbols. More...
 
uint8_t m_BE
 Backoff exponent. More...
 
EventId m_canProceedEvent
 Scheduler event for checking if we can complete the transmission before the end of the CAP. More...
 
bool m_ccaRequestRunning
 Flag indicating that the PHY is currently running a CCA. More...
 
bool m_coorDest
 Indicates whether the CSMA procedure is targeted for a message to be sent to the coordinator. More...
 
uint8_t m_CW
 Contention window length (used in slotted ver only). More...
 
EventId m_endCapEvent
 Scheduler event for the end of the current CAP. More...
 
bool m_isSlotted
 Beacon-enabled slotted or nonbeacon-enabled unslotted CSMA-CA. More...
 
LrWpanMacStateCallback m_lrWpanMacStateCallback
 The callback to inform the configured MAC of the CSMA/CA result. More...
 
LrWpanMacTransCostCallback m_lrWpanMacTransCostCallback
 The callback to inform the cost of a transaction in slotted CSMA-CA. More...
 
Ptr< LrWpanMacm_mac
 The MAC instance for which this CSMA/CA implemenation is configured. More...
 
bool m_macBattLifeExt
 Battery Life Extension. More...
 
uint8_t m_macMaxBE
 Maximum backoff exponent. More...
 
uint8_t m_macMaxCSMABackoffs
 Maximum number of backoffs. More...
 
uint8_t m_macMinBE
 Minimum backoff exponent. More...
 
uint8_t m_NB
 Number of backoffs for the current transmission. More...
 
Ptr< UniformRandomVariablem_random
 Uniform random variable stream. More...
 
EventId m_randomBackoffEvent
 Scheduler event for the start of the next random backoff/slot. More...
 
uint64_t m_randomBackoffPeriodsLeft
 Count the number of remaining random backoff periods left to delay. More...
 
EventId m_requestCcaEvent
 Scheduler event when to start the CCA after a random backoff. More...
 

Additional Inherited Members

- Protected Member Functions inherited from ns3::Object
 Object (const Object &o)
 Copy an Object. More...
 
virtual void DoDispose (void)
 Destructor implementation. More...
 
virtual void DoInitialize (void)
 Initialize() implementation. More...
 
virtual void NotifyNewAggregate (void)
 Notify all Objects aggregated to this one of a new Object being aggregated. More...
 
- Protected Member Functions inherited from ns3::ObjectBase
void ConstructSelf (const AttributeConstructionList &attributes)
 Complete construction of ObjectBase; invoked by derived classes. More...
 
virtual void NotifyConstructionCompleted (void)
 Notifier called once the ObjectBase is fully constructed. More...
 

Detailed Description

This class is a helper for the LrWpanMac to manage the Csma/CA state machine according to IEEE 802.15.4-2006, section 7.5.1.4.

Introspection did not find any typical Config paths.


No Attributes are defined for this type.
No TraceSources are defined for this type.
Size of this type is 200 bytes (on a 64-bit architecture).

Definition at line 56 of file lr-wpan-csmaca.h.

Constructor & Destructor Documentation

◆ LrWpanCsmaCa() [1/2]

ns3::LrWpanCsmaCa::LrWpanCsmaCa ( void  )

◆ ~LrWpanCsmaCa()

ns3::LrWpanCsmaCa::~LrWpanCsmaCa ( void  )
virtual

Definition at line 70 of file lr-wpan-csmaca.cc.

References m_mac.

◆ LrWpanCsmaCa() [2/2]

ns3::LrWpanCsmaCa::LrWpanCsmaCa ( const LrWpanCsmaCa )
delete

Member Function Documentation

◆ AssignStreams()

int64_t ns3::LrWpanCsmaCa::AssignStreams ( int64_t  stream)

Assign a fixed random variable stream number to the random variables used by this model.

Return the number of streams that have been assigned.

Parameters
streamfirst stream index to use
Returns
the number of stream indices assigned by this model

Definition at line 573 of file lr-wpan-csmaca.cc.

References m_random, NS_LOG_FUNCTION, and ns3::RandomVariableStream::SetStream().

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◆ Cancel()

void ns3::LrWpanCsmaCa::Cancel ( void  )

Cancel CSMA-CA algorithm.

Definition at line 285 of file lr-wpan-csmaca.cc.

References ns3::EventId::Cancel(), m_canProceedEvent, m_randomBackoffEvent, and m_requestCcaEvent.

Referenced by DoDispose().

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◆ CanProceed()

void ns3::LrWpanCsmaCa::CanProceed ( void  )

In the slotted CSMA-CA, after random backoff, determine if the remaining CSMA-CA operation can proceed, i.e.

can the entire transactions can be transmitted before the end of the CAP. This step is performed between step 2 and 3. This step is NOT performed for the unslotted CSMA-CA. If it can proceed function RequestCCA() is called.

Definition at line 390 of file lr-wpan-csmaca.cc.

References ns3::Time::As(), DeferCsmaTimeout(), ns3::Time::GetSeconds(), GetTimeLeftInCap(), ns3::Callback< R, T1, T2, T3, T4, T5, T6, T7, T8, T9 >::IsNull(), m_CW, m_endCapEvent, m_lrWpanMacTransCostCallback, m_mac, m_randomBackoffPeriodsLeft, m_requestCcaEvent, NS_LOG_DEBUG, NS_LOG_FUNCTION, RequestCCA(), ns3::Time::S, ns3::Simulator::Schedule(), ns3::Simulator::ScheduleNow(), and ns3::Seconds().

Referenced by RandomBackoffDelay().

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◆ DeferCsmaTimeout()

void ns3::LrWpanCsmaCa::DeferCsmaTimeout ( void  )

The CSMA algorithm call this function at the end of the CAP to return the MAC state back to to IDLE after a transmission was deferred due to the lack of time in the CAP.

Definition at line 474 of file lr-wpan-csmaca.cc.

References m_lrWpanMacStateCallback, ns3::MAC_CSMA_DEFERRED, and NS_LOG_FUNCTION.

Referenced by CanProceed(), and RandomBackoffDelay().

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◆ DoDispose()

void ns3::LrWpanCsmaCa::DoDispose ( void  )
privatevirtual

Destructor implementation.

This method is called by Dispose() or by the Object's destructor, whichever comes first.

Subclasses are expected to implement their real destruction code in an overridden version of this method and chain up to their parent's implementation once they are done. i.e, for simplicity, the destructor of every subclass should be empty and its content should be moved to the associated DoDispose() method.

It is safe to call GetObject() from within this method.

Reimplemented from ns3::Object.

Definition at line 76 of file lr-wpan-csmaca.cc.

References Cancel(), m_lrWpanMacStateCallback, m_lrWpanMacTransCostCallback, and m_mac.

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◆ GetBatteryLifeExtension()

bool ns3::LrWpanCsmaCa::GetBatteryLifeExtension ( void  )

Get the value of the Battery Life Extension.

Returns
true or false to Battery Life Extension support

Definition at line 587 of file lr-wpan-csmaca.cc.

References m_macBattLifeExt.

◆ GetMac()

Ptr< LrWpanMac > ns3::LrWpanCsmaCa::GetMac ( void  ) const

Get the MAC to which this CSMA/CA implementation is attached to.

Returns
the used MAC

Definition at line 92 of file lr-wpan-csmaca.cc.

References m_mac.

◆ GetMacMaxBE()

uint8_t ns3::LrWpanCsmaCa::GetMacMaxBE ( void  ) const

Get the maximum backoff exponent value.

See IEEE 802.15.4-2006, section 7.4.2, Table 86.

Returns
the maximum backoff exponent value

Definition at line 149 of file lr-wpan-csmaca.cc.

References m_macMaxBE, and NS_LOG_FUNCTION.

◆ GetMacMaxCSMABackoffs()

uint8_t ns3::LrWpanCsmaCa::GetMacMaxCSMABackoffs ( void  ) const

Get the maximum number of backoffs.

See IEEE 802.15.4-2006, section 7.4.2, Table 86.

Returns
the maximum number of backoffs

Definition at line 164 of file lr-wpan-csmaca.cc.

References m_macMaxCSMABackoffs, and NS_LOG_FUNCTION.

◆ GetMacMinBE()

uint8_t ns3::LrWpanCsmaCa::GetMacMinBE ( void  ) const

Get the minimum backoff exponent value.

See IEEE 802.15.4-2006, section 7.4.2, Table 86.

Returns
the minimum backoff exponent value

Definition at line 134 of file lr-wpan-csmaca.cc.

References m_macMinBE, and NS_LOG_FUNCTION.

◆ GetNB()

uint8_t ns3::LrWpanCsmaCa::GetNB ( void  )

Get the number of CSMA retries.

Returns
the number of CSMA retries

Definition at line 581 of file lr-wpan-csmaca.cc.

References m_NB.

◆ GetTimeLeftInCap()

Time ns3::LrWpanCsmaCa::GetTimeLeftInCap ( )
private

Get the time left in the CAP portion of the Outgoing or Incoming superframe.

Returns
the time left in the CAP

Definition at line 355 of file lr-wpan-csmaca.cc.

References m_coorDest, m_mac, ns3::Simulator::Now(), and ns3::Seconds().

Referenced by CanProceed(), and RandomBackoffDelay().

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◆ GetTimeToNextSlot()

Time ns3::LrWpanCsmaCa::GetTimeToNextSlot ( void  ) const

Locates the time to the next backoff period boundary in the SUPERFRAME and returns the amount of time left to this moment.

Returns
time offset to the next slot

Definition at line 186 of file lr-wpan-csmaca.cc.

References ns3::Time::As(), ns3::Time::GetSeconds(), m_aUnitBackoffPeriod, m_coorDest, m_mac, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::Time::S, and ns3::Seconds().

Referenced by Start().

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◆ GetTypeId()

TypeId ns3::LrWpanCsmaCa::GetTypeId ( void  )
static

Get the type ID.

Returns
the object TypeId

Definition at line 41 of file lr-wpan-csmaca.cc.

References ns3::TypeId::SetParent().

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◆ GetUnitBackoffPeriod()

uint64_t ns3::LrWpanCsmaCa::GetUnitBackoffPeriod ( void  ) const

Get the number of symbols forming the basic time period used by the CSMA-CA algorithm.

See IEEE 802.15.4-2006, section 7.4.1, Table 85.

Returns
the period length in symbols

Definition at line 178 of file lr-wpan-csmaca.cc.

References m_aUnitBackoffPeriod, and NS_LOG_FUNCTION.

Referenced by RandomBackoffDelay().

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◆ IsSlottedCsmaCa()

bool ns3::LrWpanCsmaCa::IsSlottedCsmaCa ( void  ) const

Check if the slotted CSMA/CA version is being used.

Returns
true, if slotted CSMA/CA is used, false otherwise.

Definition at line 112 of file lr-wpan-csmaca.cc.

References m_isSlotted, and NS_LOG_FUNCTION.

Referenced by PlmeCcaConfirm(), and Start().

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◆ IsUnSlottedCsmaCa()

bool ns3::LrWpanCsmaCa::IsUnSlottedCsmaCa ( void  ) const

Check if the unslotted CSMA/CA version is being used.

Returns
true, if unslotted CSMA/CA is used, false otherwise.

Definition at line 119 of file lr-wpan-csmaca.cc.

References m_isSlotted, and NS_LOG_FUNCTION.

Referenced by RandomBackoffDelay().

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◆ operator=()

LrWpanCsmaCa & ns3::LrWpanCsmaCa::operator= ( const LrWpanCsmaCa )
delete

◆ PlmeCcaConfirm()

void ns3::LrWpanCsmaCa::PlmeCcaConfirm ( LrWpanPhyEnumeration  status)

IEEE 802.15.4-2006 section 6.2.2.2 PLME-CCA.confirm status.

Parameters
statusTRX_OFF, BUSY or IDLE

When Phy has completed CCA, it calls back here which in turn execute the final steps of the CSMA-CA algorithm. It checks to see if the Channel is idle, if so check the Contention window before permitting transmission (step 5). If channel is busy, either backoff and perform CCA again or treat as channel access failure (step 4).

Definition at line 481 of file lr-wpan-csmaca.cc.

References ns3::CHANNEL_ACCESS_FAILURE, ns3::CHANNEL_IDLE, ns3::IEEE_802_15_4_PHY_IDLE, ns3::Callback< R, T1, T2, T3, T4, T5, T6, T7, T8, T9 >::IsNull(), IsSlottedCsmaCa(), m_BE, m_ccaRequestRunning, m_CW, m_lrWpanMacStateCallback, m_macMaxBE, m_macMaxCSMABackoffs, m_NB, m_randomBackoffEvent, m_requestCcaEvent, min, NS_LOG_DEBUG, NS_LOG_FUNCTION, NS_LOG_LOGIC, RandomBackoffDelay(), RequestCCA(), and ns3::Simulator::ScheduleNow().

Referenced by ns3::LrWpanNetDevice::CompleteConfig().

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◆ RandomBackoffDelay()

void ns3::LrWpanCsmaCa::RandomBackoffDelay ( void  )

In step 2 of the CSMA-CA, perform a random backoff in the range of 0 to 2^BE -1.

Definition at line 295 of file lr-wpan-csmaca.cc.

References ns3::Time::As(), CanProceed(), DeferCsmaTimeout(), ns3::Time::GetSeconds(), GetTimeLeftInCap(), GetUnitBackoffPeriod(), ns3::UniformRandomVariable::GetValue(), IsUnSlottedCsmaCa(), m_aUnitBackoffPeriod, m_BE, m_canProceedEvent, m_endCapEvent, m_mac, m_random, m_randomBackoffPeriodsLeft, m_requestCcaEvent, NS_LOG_DEBUG, NS_LOG_FUNCTION, RequestCCA(), ns3::Time::S, ns3::Simulator::Schedule(), and ns3::Seconds().

Referenced by PlmeCcaConfirm(), and Start().

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◆ RequestCCA()

void ns3::LrWpanCsmaCa::RequestCCA ( void  )

Request the Phy to perform CCA (Step 3)

Definition at line 466 of file lr-wpan-csmaca.cc.

References m_ccaRequestRunning, m_mac, and NS_LOG_FUNCTION.

Referenced by CanProceed(), PlmeCcaConfirm(), and RandomBackoffDelay().

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◆ SetBatteryLifeExtension()

void ns3::LrWpanCsmaCa::SetBatteryLifeExtension ( bool  batteryLifeExtension)

Set the value of the Battery Life Extension.

Parameters
batteryLifeExtensionthe Battery Life Extension value active or inactive

Definition at line 566 of file lr-wpan-csmaca.cc.

References m_macBattLifeExt.

◆ SetLrWpanMacStateCallback()

void ns3::LrWpanCsmaCa::SetLrWpanMacStateCallback ( LrWpanMacStateCallback  macState)

Set the callback function to the MAC.

Used at the end of a Channel Assessment, as part of the interconnections between the CSMA-CA and the MAC. The callback lets MAC know a channel is either idle or busy.

Parameters
macStatethe mac state callback

Definition at line 559 of file lr-wpan-csmaca.cc.

References m_lrWpanMacStateCallback, and NS_LOG_FUNCTION.

◆ SetLrWpanMacTransCostCallback()

void ns3::LrWpanCsmaCa::SetLrWpanMacTransCostCallback ( LrWpanMacTransCostCallback  trans)

Set the callback function to report a transaction cost in slotted CSMA-CA.

The callback is triggered in CanProceed() after calculating the transaction cost (2 CCA checks,transmission cost, turnAroundTime, ifs) in the boundary of an Active Period.

Parameters
transthe transaction cost callback

Definition at line 551 of file lr-wpan-csmaca.cc.

References m_lrWpanMacTransCostCallback, and NS_LOG_FUNCTION.

◆ SetMac()

void ns3::LrWpanCsmaCa::SetMac ( Ptr< LrWpanMac mac)

Set the MAC to which this CSMA/CA implementation is attached to.

Parameters
macthe used MAC

Definition at line 86 of file lr-wpan-csmaca.cc.

References m_mac, and third::mac.

◆ SetMacMaxBE()

void ns3::LrWpanCsmaCa::SetMacMaxBE ( uint8_t  macMaxBE)

Set the maximum backoff exponent value.

See IEEE 802.15.4-2006, section 7.4.2, Table 86.

Parameters
macMaxBEthe maximum backoff exponent value

Definition at line 141 of file lr-wpan-csmaca.cc.

References m_macMaxBE, NS_ASSERT_MSG, and NS_LOG_FUNCTION.

◆ SetMacMaxCSMABackoffs()

void ns3::LrWpanCsmaCa::SetMacMaxCSMABackoffs ( uint8_t  macMaxCSMABackoffs)

Set the maximum number of backoffs.

See IEEE 802.15.4-2006, section 7.4.2, Table 86.

Parameters
macMaxCSMABackoffsthe maximum number of backoffs

Definition at line 156 of file lr-wpan-csmaca.cc.

References m_macMaxCSMABackoffs, NS_ASSERT_MSG, and NS_LOG_FUNCTION.

◆ SetMacMinBE()

void ns3::LrWpanCsmaCa::SetMacMinBE ( uint8_t  macMinBE)

Set the minimum backoff exponent value.

See IEEE 802.15.4-2006, section 7.4.2, Table 86.

Parameters
macMinBEthe minimum backoff exponent value

Definition at line 126 of file lr-wpan-csmaca.cc.

References m_macMaxBE, m_macMinBE, NS_ASSERT_MSG, and NS_LOG_FUNCTION.

◆ SetSlottedCsmaCa()

void ns3::LrWpanCsmaCa::SetSlottedCsmaCa ( void  )

Configure for the use of the slotted CSMA/CA version.

Definition at line 98 of file lr-wpan-csmaca.cc.

References m_isSlotted, and NS_LOG_FUNCTION.

◆ SetUnitBackoffPeriod()

void ns3::LrWpanCsmaCa::SetUnitBackoffPeriod ( uint64_t  unitBackoffPeriod)

Set the number of symbols forming the basic time period used by the CSMA-CA algorithm.

See IEEE 802.15.4-2006, section 7.4.1, Table 85.

Parameters
unitBackoffPeriodthe period length in symbols

Definition at line 171 of file lr-wpan-csmaca.cc.

References m_aUnitBackoffPeriod, and NS_LOG_FUNCTION.

◆ SetUnSlottedCsmaCa()

void ns3::LrWpanCsmaCa::SetUnSlottedCsmaCa ( void  )

Configure for the use of the unslotted CSMA/CA version.

Definition at line 105 of file lr-wpan-csmaca.cc.

References m_isSlotted, and NS_LOG_FUNCTION.

◆ Start()

void ns3::LrWpanCsmaCa::Start ( void  )

Start CSMA-CA algorithm (step 1), initialize NB, BE for both slotted and unslotted CSMA-CA.

For slotted CSMA-CA initializes CW and starts the backoff slot count.

Definition at line 244 of file lr-wpan-csmaca.cc.

References GetTimeToNextSlot(), IsSlottedCsmaCa(), m_BE, m_coorDest, m_CW, m_mac, m_macBattLifeExt, m_macMinBE, m_NB, m_randomBackoffEvent, min, NS_LOG_FUNCTION, RandomBackoffDelay(), ns3::Simulator::Schedule(), and ns3::Simulator::ScheduleNow().

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Member Data Documentation

◆ m_aUnitBackoffPeriod

uint64_t ns3::LrWpanCsmaCa::m_aUnitBackoffPeriod
private

Number of symbols per CSMA/CA time unit, default 20 symbols.

Definition at line 314 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), GetTimeToNextSlot(), GetUnitBackoffPeriod(), RandomBackoffDelay(), and SetUnitBackoffPeriod().

◆ m_BE

uint8_t ns3::LrWpanCsmaCa::m_BE
private

Backoff exponent.

Definition at line 294 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), PlmeCcaConfirm(), RandomBackoffDelay(), and Start().

◆ m_canProceedEvent

EventId ns3::LrWpanCsmaCa::m_canProceedEvent
private

Scheduler event for checking if we can complete the transmission before the end of the CAP.

Definition at line 339 of file lr-wpan-csmaca.h.

Referenced by Cancel(), and RandomBackoffDelay().

◆ m_ccaRequestRunning

bool ns3::LrWpanCsmaCa::m_ccaRequestRunning
private

Flag indicating that the PHY is currently running a CCA.

Used to prevent reporting the channel status to the MAC while canceling the CSMA algorithm.

Definition at line 344 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), PlmeCcaConfirm(), and RequestCCA().

◆ m_coorDest

bool ns3::LrWpanCsmaCa::m_coorDest
private

Indicates whether the CSMA procedure is targeted for a message to be sent to the coordinator.

Used to run slotted CSMA/CA on the incoming or outgoing superframe according to the target.

Definition at line 350 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), GetTimeLeftInCap(), GetTimeToNextSlot(), and Start().

◆ m_CW

uint8_t ns3::LrWpanCsmaCa::m_CW
private

Contention window length (used in slotted ver only).

Definition at line 290 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), CanProceed(), PlmeCcaConfirm(), and Start().

◆ m_endCapEvent

EventId ns3::LrWpanCsmaCa::m_endCapEvent
private

Scheduler event for the end of the current CAP.

Definition at line 330 of file lr-wpan-csmaca.h.

Referenced by CanProceed(), and RandomBackoffDelay().

◆ m_isSlotted

bool ns3::LrWpanCsmaCa::m_isSlotted
private

Beacon-enabled slotted or nonbeacon-enabled unslotted CSMA-CA.

Definition at line 278 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), IsSlottedCsmaCa(), IsUnSlottedCsmaCa(), SetSlottedCsmaCa(), and SetUnSlottedCsmaCa().

◆ m_lrWpanMacStateCallback

LrWpanMacStateCallback ns3::LrWpanCsmaCa::m_lrWpanMacStateCallback
private

The callback to inform the configured MAC of the CSMA/CA result.

Definition at line 274 of file lr-wpan-csmaca.h.

Referenced by DeferCsmaTimeout(), DoDispose(), PlmeCcaConfirm(), and SetLrWpanMacStateCallback().

◆ m_lrWpanMacTransCostCallback

LrWpanMacTransCostCallback ns3::LrWpanCsmaCa::m_lrWpanMacTransCostCallback
private

The callback to inform the cost of a transaction in slotted CSMA-CA.

Definition at line 270 of file lr-wpan-csmaca.h.

Referenced by CanProceed(), DoDispose(), and SetLrWpanMacTransCostCallback().

◆ m_mac

Ptr<LrWpanMac> ns3::LrWpanCsmaCa::m_mac
private

The MAC instance for which this CSMA/CA implemenation is configured.

Definition at line 282 of file lr-wpan-csmaca.h.

Referenced by ~LrWpanCsmaCa(), CanProceed(), DoDispose(), GetMac(), GetTimeLeftInCap(), GetTimeToNextSlot(), RandomBackoffDelay(), RequestCCA(), SetMac(), and Start().

◆ m_macBattLifeExt

bool ns3::LrWpanCsmaCa::m_macBattLifeExt
private

Battery Life Extension.

Definition at line 298 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), GetBatteryLifeExtension(), SetBatteryLifeExtension(), and Start().

◆ m_macMaxBE

uint8_t ns3::LrWpanCsmaCa::m_macMaxBE
private

Maximum backoff exponent.

3 - 8, default 5

Definition at line 306 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), GetMacMaxBE(), PlmeCcaConfirm(), SetMacMaxBE(), and SetMacMinBE().

◆ m_macMaxCSMABackoffs

uint8_t ns3::LrWpanCsmaCa::m_macMaxCSMABackoffs
private

Maximum number of backoffs.

0 - 5, default 4

Definition at line 310 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), GetMacMaxCSMABackoffs(), PlmeCcaConfirm(), and SetMacMaxCSMABackoffs().

◆ m_macMinBE

uint8_t ns3::LrWpanCsmaCa::m_macMinBE
private

Minimum backoff exponent.

0 - macMaxBE, default 3

Definition at line 302 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), GetMacMinBE(), SetMacMinBE(), and Start().

◆ m_NB

uint8_t ns3::LrWpanCsmaCa::m_NB
private

Number of backoffs for the current transmission.

Definition at line 286 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), GetNB(), PlmeCcaConfirm(), and Start().

◆ m_random

Ptr<UniformRandomVariable> ns3::LrWpanCsmaCa::m_random
private

Uniform random variable stream.

Definition at line 322 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), AssignStreams(), and RandomBackoffDelay().

◆ m_randomBackoffEvent

EventId ns3::LrWpanCsmaCa::m_randomBackoffEvent
private

Scheduler event for the start of the next random backoff/slot.

Definition at line 326 of file lr-wpan-csmaca.h.

Referenced by Cancel(), PlmeCcaConfirm(), and Start().

◆ m_randomBackoffPeriodsLeft

uint64_t ns3::LrWpanCsmaCa::m_randomBackoffPeriodsLeft
private

Count the number of remaining random backoff periods left to delay.

Definition at line 318 of file lr-wpan-csmaca.h.

Referenced by LrWpanCsmaCa(), CanProceed(), and RandomBackoffDelay().

◆ m_requestCcaEvent

EventId ns3::LrWpanCsmaCa::m_requestCcaEvent
private

Scheduler event when to start the CCA after a random backoff.

Definition at line 334 of file lr-wpan-csmaca.h.

Referenced by Cancel(), CanProceed(), PlmeCcaConfirm(), and RandomBackoffDelay().


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