Computes the channel condition for the V2V Highway scenario. More...

#include "three-gpp-v2v-channel-condition-model.h"

Inheritance diagram for ns3::ThreeGppV2vHighwayChannelConditionModel:

Collaboration diagram for ns3::ThreeGppV2vHighwayChannelConditionModel:

Public Member Functions
	ThreeGppV2vHighwayChannelConditionModel ()
	Constructor for the ThreeGppV2vHighwayChannelConditionModel class.

	~ThreeGppV2vHighwayChannelConditionModel () override
	Destructor for the ThreeGppV2vHighwayChannelConditionModel class.

Public Member Functions inherited from ns3::ThreeGppChannelConditionModel
	ThreeGppChannelConditionModel ()
	Constructor for the ThreeGppRmaChannelConditionModel class.

	~ThreeGppChannelConditionModel () override
	Destructor for the ThreeGppRmaChannelConditionModel class.

int64_t	AssignStreams (int64_t stream) override
	If this model uses objects of type RandomVariableStream, set the stream numbers to the integers starting with the offset 'stream'.

Ptr< ChannelCondition >	GetChannelCondition (Ptr< const MobilityModel > a, Ptr< const MobilityModel > b) const override
	Retrieve the condition of the channel between a and b.

Public Member Functions inherited from ns3::ChannelConditionModel
	ChannelConditionModel ()
	Constructor for the ChannelConditionModel class.

	ChannelConditionModel (const ChannelConditionModel &)=delete

	~ChannelConditionModel () override
	Destructor for the ChannelConditionModel class.

ChannelConditionModel &	operator= (const ChannelConditionModel &)=delete

Public Member Functions inherited from ns3::Object
	Object ()
	Constructor.

	~Object () override
	Destructor.

void	AggregateObject (Ptr< Object > other)
	Aggregate two Objects together.

void	Dispose ()
	Dispose of this Object.

AggregateIterator	GetAggregateIterator () const
	Get an iterator to the Objects aggregated to this one.

TypeId	GetInstanceTypeId () const final
	Get the most derived TypeId for this Object.

template<typename T >
Ptr< T >	GetObject () const
	Get a pointer to the requested aggregated Object.

template<>
Ptr< Object >	GetObject () const
	Specialization of () for objects of type ns3::Object.

template<typename T >
Ptr< T >	GetObject (TypeId tid) const
	Get a pointer to the requested aggregated Object by TypeId.

template<>
Ptr< Object >	GetObject (TypeId tid) const
	Specialization of (TypeId tid) for objects of type ns3::Object.

void	Initialize ()
	Invoke DoInitialize on all Objects aggregated to this one.

bool	IsInitialized () const
	Check if the object has been initialized.

void	UnidirectionalAggregateObject (Ptr< Object > other)
	Aggregate an Object to another Object.

Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	Default constructor.

	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor.

uint32_t	GetReferenceCount () const
	Get the reference count of the object.

SimpleRefCount &	operator= (const SimpleRefCount &o)
	Assignment operator.

void	Ref () const
	Increment the reference count.

void	Unref () const
	Decrement the reference count.

Public Member Functions inherited from ns3::ObjectBase
virtual	~ObjectBase ()
	Virtual destructor.

void	GetAttribute (std::string name, AttributeValue &value, bool permissive=false) const
	Get the value of an attribute, raising fatal errors if unsuccessful.

bool	GetAttributeFailSafe (std::string name, AttributeValue &value) const
	Get the value of an attribute without raising errors.

void	SetAttribute (std::string name, const AttributeValue &value)
	Set a single attribute, raising fatal errors if unsuccessful.

bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)
	Set a single attribute without raising errors.

bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)
	Connect a TraceSource to a Callback with a context.

bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
	Connect a TraceSource to a Callback without a context.

bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected with a context.

bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected without a context.

Static Public Member Functions
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::ThreeGppChannelConditionModel
static double	Calculate2dDistance (const Vector &a, const Vector &b)
	Computes the 2D distance between two 3D vectors.

static std::tuple< double, double >	GetQuantizedElevationAngle (Ptr< const MobilityModel > a, Ptr< const MobilityModel > b)
	Computes and quantizes the elevation angle to a two-digits integer in [10, 90].

static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::ChannelConditionModel
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId ()
	Register this type.

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId ()
	Get the type ID.

Private Member Functions
double	ComputePlos (Ptr< const MobilityModel > a, Ptr< const MobilityModel > b) const override
	Compute the LOS probability as specified in Table Table 6.2-1 of 3GPP TR 37.885 for the V2V Highway scenario.

double	ComputePnlos (Ptr< const MobilityModel > a, Ptr< const MobilityModel > b) const override
	Compute the NLOS probability.

Ptr< ChannelCondition >	GetChCondAndFixCallback (Ptr< const MobilityModel > a, Ptr< const MobilityModel > b)
	Get the channel condition and redirect the callback ComputeChCond to GetChCondWithBuildings or to GetChCondWithNoBuildings depending on if there are buildings in the scenario or not.

Ptr< ChannelCondition >	GetChCondWithBuildings (Ptr< const MobilityModel > a, Ptr< const MobilityModel > b) const
	Get the channel condition between `a` and `b` using BuildingsChannelConditionModel.

Ptr< ChannelCondition >	GetChCondWithNoBuildings (Ptr< const MobilityModel > a, Ptr< const MobilityModel > b) const
	Get the channel condition between `a` and `b`.

Private Attributes
std::function< Ptr< ChannelCondition >(Ptr< const MobilityModel >, Ptr< const MobilityModel >)>	ComputeChCond
	The callback which is hooked to a method to compute channel condition.

Ptr< BuildingsChannelConditionModel >	m_buildingsCcm
	used to determine the obstructions due to buildings

Additional Inherited Members
Protected Types inherited from ns3::ThreeGppChannelConditionModel
enum	VehicleDensity { LOW , MEDIUM , HIGH , INVALID }
	Determine the density of vehicles in a V2V scenario. More...

Protected Member Functions inherited from ns3::ThreeGppChannelConditionModel
void	DoDispose () override
	Destructor implementation.

Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
	Copy an Object.

virtual void	DoInitialize ()
	Initialize() implementation.

virtual void	NotifyNewAggregate ()
	Notify all Objects aggregated to this one of a new Object being aggregated.

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
	Complete construction of ObjectBase; invoked by derived classes.

virtual void	NotifyConstructionCompleted ()
	Notifier called once the ObjectBase is fully constructed.

Protected Attributes inherited from ns3::ThreeGppChannelConditionModel
Ptr< UniformRandomVariable >	m_uniformVar
	uniform random variable

Related Symbols inherited from ns3::ObjectBase
static TypeId	GetObjectIid ()
	Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly.

Detailed Description

Computes the channel condition for the V2V Highway scenario.

Computes the channel condition following the specifications for the V2V Highway scenario reported in Table 6.2-1 of 3GPP TR 37.885.

3GPP TR 37.885 defines 3 different channel states for vehicular environments: LOS, NLOS and NLOSv, the latter representing the case in which the LOS path is blocked by other vehicles in the scenario. The document defines a probabilistic model to determine if the channel state is LOS or NLOSv, while the NLOS state is determined in a deterministic way based on the buildings deployed in the scenario. For this reason, this class makes use of an instance of BuildingsChannelConditionModel to determine if the LOS is obstructed by buildings or not.

Config Paths

ns3::ThreeGppV2vHighwayChannelConditionModel is accessible through the following paths with Config::Set and Config::Connect:

"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Phy/Channel/$ns3::SpectrumChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Phy/Channel/$ns3::SpectrumChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Phy/Channel/$ns3::YansWifiChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Phy/Channel/$ns3::YansWifiChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Phys/[i]/Channel/$ns3::SpectrumChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Phys/[i]/Channel/$ns3::SpectrumChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Phys/[i]/Channel/$ns3::YansWifiChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Phys/[i]/Channel/$ns3::YansWifiChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/NodeList/[i]/DeviceList/[i]/$ns3::lrwpan::LrWpanNetDevice/Channel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/NodeList/[i]/DeviceList/[i]/$ns3::lrwpan::LrWpanNetDevice/Channel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/ChannelList/[i]/$ns3::SpectrumChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/ChannelList/[i]/$ns3::SpectrumChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/ChannelList/[i]/$ns3::YansWifiChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"
"/ChannelList/[i]/$ns3::YansWifiChannel/PropagationLossModel/$ns3::ThreeGppPropagationLossModel/ChannelConditionModel/$ns3::ThreeGppV2vHighwayChannelConditionModel"

No Attributes are defined for this type.

Attributes defined in parent class ns3::ThreeGppChannelConditionModel

LinkO2iConditionToAntennaHeight: Specifies whether the O2I condition will be determined based on the UE height, i.e. if the UE height is 1.5 then it is O2O, otherwise it is O2I.
- Set with class: ns3::BooleanValue
- Underlying type: bool
- Initial value: false
- Flags: constructwriteread
- Support level: SUPPORTED
O2iLowLossThreshold: Specifies what will be the ratio of O2I low - high penetration losses. Default value is 1.0 meaning thatall losses will be low
- Set with class: ns3::DoubleValue
- Underlying type: double 0:1
- Initial value: 1
- Flags: constructwriteread
- Support level: SUPPORTED
O2iThreshold: Specifies what will be the ratio of O2I channel conditions. Default value is 0 that corresponds to 0 O2I losses.
- Set with class: ns3::DoubleValue
- Underlying type: double 0:1
- Initial value: 0
- Flags: constructwriteread
- Support level: SUPPORTED
UpdatePeriod: Specifies the time period after which the channel condition is recomputed. If set to 0, the channel condition is never updated.
- Set with class: ns3::TimeValue
- Underlying type: Time -9.22337e+18ns:+9.22337e+18ns
- Initial value: +0ns
- Flags: constructwriteread
- Support level: SUPPORTED

No TraceSources are defined for this type.
Group: Buildings

Size of this type is 208 bytes (on a 64-bit architecture).

Definition at line 104 of file three-gpp-v2v-channel-condition-model.h.

Constructor & Destructor Documentation

◆ ThreeGppV2vHighwayChannelConditionModel()

ns3::ThreeGppV2vHighwayChannelConditionModel::ThreeGppV2vHighwayChannelConditionModel ( )

Constructor for the ThreeGppV2vHighwayChannelConditionModel class.

Definition at line 99 of file three-gpp-v2v-channel-condition-model.cc.

References ComputeChCond, ns3::CreateObject(), GetChCondAndFixCallback(), and m_buildingsCcm.

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◆ ~ThreeGppV2vHighwayChannelConditionModel()

ns3::ThreeGppV2vHighwayChannelConditionModel::~ThreeGppV2vHighwayChannelConditionModel ( )

override

Destructor for the ThreeGppV2vHighwayChannelConditionModel class.

Definition at line 109 of file three-gpp-v2v-channel-condition-model.cc.

Member Function Documentation

◆ ComputePlos()

double ns3::ThreeGppV2vHighwayChannelConditionModel::ComputePlos	(	Ptr< const MobilityModel >	a,
		Ptr< const MobilityModel >	b ) const

overrideprivatevirtual

Compute the LOS probability as specified in Table Table 6.2-1 of 3GPP TR 37.885 for the V2V Highway scenario.

Parameters

a	tx mobility model
b	rx mobility model

Returns: the LOS probability

Implements ns3::ThreeGppChannelConditionModel.

Definition at line 114 of file three-gpp-v2v-channel-condition-model.cc.

References ns3::ThreeGppChannelConditionModel::Calculate2dDistance(), ComputeChCond, NS_ASSERT_MSG, and NS_LOG_FUNCTION.

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◆ ComputePnlos()

double ns3::ThreeGppV2vHighwayChannelConditionModel::ComputePnlos	(	Ptr< const MobilityModel >	a,
		Ptr< const MobilityModel >	b ) const

overrideprivatevirtual

Compute the NLOS probability.

It determines the presence of obstructions between the tx and the rx based on the buildings deployed in the scenario. It returns 1 if the LOS path is obstructed, 0 otherwise.

Parameters

a	tx mobility model
b	rx mobility model

Returns: the NLOS probability

Reimplemented from ns3::ThreeGppChannelConditionModel.

Definition at line 144 of file three-gpp-v2v-channel-condition-model.cc.

References ComputeChCond, NS_ASSERT_MSG, and NS_LOG_FUNCTION.

◆ GetChCondAndFixCallback()

Ptr< ChannelCondition > ns3::ThreeGppV2vHighwayChannelConditionModel::GetChCondAndFixCallback	(	Ptr< const MobilityModel >	a,
		Ptr< const MobilityModel >	b )

private

Get the channel condition and redirect the callback ComputeChCond to GetChCondWithBuildings or to GetChCondWithNoBuildings depending on if there are buildings in the scenario or not.

Parameters

a	tx mobility model
b	rx mobility model

Returns: the the condition of the channel between a and b

Definition at line 163 of file three-gpp-v2v-channel-condition-model.cc.

References ns3::BuildingList::Begin(), ComputeChCond, ns3::BuildingList::End(), GetChCondWithBuildings(), and GetChCondWithNoBuildings().

Referenced by ThreeGppV2vHighwayChannelConditionModel().

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◆ GetChCondWithBuildings()

Ptr< ChannelCondition > ns3::ThreeGppV2vHighwayChannelConditionModel::GetChCondWithBuildings	(	Ptr< const MobilityModel >	a,
		Ptr< const MobilityModel >	b ) const

private

Get the channel condition between a and b using BuildingsChannelConditionModel.

This method will be called for the scenarios with buildings

Parameters

a	tx mobility model
b	rx mobility model

Returns: the condition of the channel between a and b

Definition at line 188 of file three-gpp-v2v-channel-condition-model.cc.

References m_buildingsCcm.

Referenced by GetChCondAndFixCallback().

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◆ GetChCondWithNoBuildings()

Ptr< ChannelCondition > ns3::ThreeGppV2vHighwayChannelConditionModel::GetChCondWithNoBuildings	(	Ptr< const MobilityModel >	a,
		Ptr< const MobilityModel >	b ) const

private

Get the channel condition between a and b.

This method will be called for the scenarios without buildings

Parameters

a	tx mobility model
b	rx mobility model

Returns: the condition of the channel between a and b

Definition at line 196 of file three-gpp-v2v-channel-condition-model.cc.

References ns3::CreateObject(), ns3::ChannelCondition::LOS, and ns3::ChannelCondition::O2O.

Referenced by GetChCondAndFixCallback().

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◆ GetTypeId()

TypeId ns3::ThreeGppV2vHighwayChannelConditionModel::GetTypeId ( )

static

Get the type ID.

Returns: the object TypeId

Definition at line 90 of file three-gpp-v2v-channel-condition-model.cc.

References ns3::TypeId::SetParent().

Referenced by ThreeGppV2vBuildingsChCondModelTestCase::DoRun(), and ThreeGppV2vHighwayLosNlosvChCondModelTestCase::DoRun().

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Member Data Documentation

◆ ComputeChCond

std::function<Ptr<ChannelCondition>(Ptr<const MobilityModel>, Ptr<const MobilityModel>)> ns3::ThreeGppV2vHighwayChannelConditionModel::ComputeChCond

private

The callback which is hooked to a method to compute channel condition.

This callback is implemented to make this model robust against the presence and absence of buildings in a highway scenario. If there are buildings in a scenario, this model will use BuildingsChannelConditionModel, which requires MobilityBuildingInfo aggregated to the nodes to compute LOS and NLOS. Otherwise, the callback is hooked to a local method GetChCondWithNoBuildings , which construct the ChannelCondtion object and set the condition to outdoor to outdoor with LOS.

Definition at line 160 of file three-gpp-v2v-channel-condition-model.h.

Referenced by ThreeGppV2vHighwayChannelConditionModel(), ComputePlos(), ComputePnlos(), and GetChCondAndFixCallback().