This class stores the subcarrier groups of all the available HE RUs. More...

#include "he-ru.h"

Collaboration diagram for ns3::HeRu:

Classes
class	RuSpec
	RU Specification. More...

struct	RuSpecCompare
	Struct providing a function call operator to compare two RUs. More...

Public Types
typedef std::pair< uint8_t, RuType >	BwTonesPair
	(bandwidth, number of tones) pair More...

using	RuAllocationMap = std::map< uint8_t, std::vector< RuSpec > >
	RU allocation map. More...

enum	RuType { RU_26_TONE = 0 , RU_52_TONE , RU_106_TONE , RU_242_TONE , RU_484_TONE , RU_996_TONE , RU_2x996_TONE }
	The different HE Resource Unit (RU) types. More...

typedef std::vector< SubcarrierRange >	SubcarrierGroup
	a vector of subcarrier ranges defining a subcarrier group More...

typedef std::map< BwTonesPair, std::vector< SubcarrierGroup > >	SubcarrierGroups
	map (bandwidth, number of tones) pairs to the group of subcarrier ranges More...

typedef std::pair< int16_t, int16_t >	SubcarrierRange
	(lowest index, highest index) pair defining a subcarrier range More...

Static Public Member Functions
static bool	DoesOverlap (uint16_t bw, RuSpec ru, const std::vector< RuSpec > &v)
	Check whether the given RU overlaps with the given set of RUs. More...

static bool	DoesOverlap (uint16_t bw, RuSpec ru, const SubcarrierGroup &toneRanges, uint8_t p20Index)
	Check whether the given RU overlaps with the given tone ranges. More...

static RuSpec	FindOverlappingRu (uint16_t bw, RuSpec referenceRu, RuType searchedRuType)
	Find the RU allocation of the given RU type overlapping the given reference RU allocation. More...

static uint16_t	GetBandwidth (RuType ruType)
	Get the approximate bandwidth occupied by a RU. More...

static std::vector< HeRu::RuSpec >	GetCentral26TonesRus (uint16_t bw, HeRu::RuType ruType)
	Get the set of 26-tone RUs that can be additionally allocated if the given bandwidth is split in RUs of the given type. More...

static uint8_t	GetEqualizedRuAllocation (RuType ruType, bool isOdd)
	Get the RU_ALLOCATION value for equal size RUs. More...

static RuType	GetEqualSizedRusForStations (uint16_t bandwidth, std::size_t &nStations, std::size_t &nCentral26TonesRus)
	Given the channel bandwidth and the number of stations candidate for being assigned an RU, maximize the number of candidate stations that can be assigned an RU subject to the constraint that all the stations must be assigned an RU of the same size (in terms of number of tones). More...

static std::size_t	GetNRus (uint16_t bw, RuType ruType)
	Get the number of distinct RUs of the given type (number of tones) available in a HE PPDU of the given bandwidth. More...

static std::vector< HeRu::RuSpec >	GetRusOfType (uint16_t bw, HeRu::RuType ruType)
	Get the set of distinct RUs of the given type (number of tones) available in a HE PPDU of the given bandwidth. More...

static std::vector< RuSpec >	GetRuSpecs (uint8_t ruAllocation)
	Get the RU specs based on RU_ALLOCATION. More...

static RuType	GetRuType (uint16_t bandwidth)
	Get the RU corresponding to the approximate bandwidth. More...

static SubcarrierGroup	GetSubcarrierGroup (uint16_t bw, RuType ruType, std::size_t phyIndex)
	Get the subcarrier group of the RU having the given PHY index among all the RUs of the given type (number of tones) available in a HE PPDU of the given bandwidth. More...

Static Public Attributes
static constexpr uint8_t	EMPTY_242_TONE_RU = 113
	Empty 242-tone RU identifier. More...

static const RuAllocationMap	m_heRuAllocations
	Table 27-26 of IEEE 802.11ax-2021. More...

static const SubcarrierGroups	m_heRuSubcarrierGroups
	Subcarrier groups for all RUs (with indices being applicable to primary 80 MHz channel) More...

Detailed Description

This class stores the subcarrier groups of all the available HE RUs.

Definition at line 34 of file he-ru.h.

Member Typedef Documentation

◆ BwTonesPair

typedef std::pair<uint8_t, RuType> ns3::HeRu::BwTonesPair

(bandwidth, number of tones) pair

Definition at line 285 of file he-ru.h.

◆ RuAllocationMap

using ns3::HeRu::RuAllocationMap = std::map<uint8_t, std::vector<RuSpec> >

RU allocation map.

Definition at line 294 of file he-ru.h.

◆ SubcarrierGroup

typedef std::vector<SubcarrierRange> ns3::HeRu::SubcarrierGroup

a vector of subcarrier ranges defining a subcarrier group

Definition at line 55 of file he-ru.h.

◆ SubcarrierGroups

typedef std::map<BwTonesPair, std::vector<SubcarrierGroup> > ns3::HeRu::SubcarrierGroups

map (bandwidth, number of tones) pairs to the group of subcarrier ranges

Definition at line 288 of file he-ru.h.

◆ SubcarrierRange

typedef std::pair<int16_t, int16_t> ns3::HeRu::SubcarrierRange

(lowest index, highest index) pair defining a subcarrier range

Definition at line 52 of file he-ru.h.

Member Enumeration Documentation

◆ RuType

enum ns3::HeRu::RuType

The different HE Resource Unit (RU) types.

Enumerator
RU_26_TONE
RU_52_TONE
RU_106_TONE
RU_242_TONE
RU_484_TONE
RU_996_TONE
RU_2x996_TONE

Definition at line 40 of file he-ru.h.

Member Function Documentation

◆ DoesOverlap() [1/2]

bool ns3::HeRu::DoesOverlap	(	uint16_t	bw,
		RuSpec	ru,
		const std::vector< RuSpec > &	v
	)

static

Check whether the given RU overlaps with the given set of RUs.

Note that for channel width of 160 MHz the returned range is relative to the 160 MHz channel (i.e. -1012 to 1012).

Parameters

bw	the bandwidth (MHz) of the HE PPDU (20, 40, 80, 160)
ru	the given RU allocation
v	the given set of RUs

Returns: true if the given RU overlaps with the given set of RUs.

Definition at line 626 of file he-ru.cc.

References ns3::HeRu::RuSpec::GetIndex(), ns3::HeRu::RuSpec::GetPrimary80MHz(), ns3::HeRu::RuSpec::GetRuType(), GetSubcarrierGroup(), and RU_2x996_TONE.

Referenced by FindOverlappingRu(), and ns3::CtrlTriggerHeader::IsValid().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ DoesOverlap() [2/2]

bool ns3::HeRu::DoesOverlap	(	uint16_t	bw,
		RuSpec	ru,
		const SubcarrierGroup &	toneRanges,
		uint8_t	p20Index
	)

static

Check whether the given RU overlaps with the given tone ranges.

Note that for channel width of 160 MHz the returned range is relative to the 160 MHz channel (i.e. -1012 to 1012).

Parameters

bw	the bandwidth (MHz) of the HE PPDU (20, 40, 80, 160)
ru	the given RU allocation
toneRanges	the given set of tone ranges
p20Index	the index of the primary20 channel

Returns: true if the given RU overlaps with the given set of tone ranges.

Definition at line 662 of file he-ru.cc.

References ns3::HeRu::RuSpec::GetPhyIndex(), ns3::HeRu::RuSpec::GetRuType(), GetSubcarrierGroup(), and RU_2x996_TONE.

Here is the call graph for this function:

◆ FindOverlappingRu()

HeRu::RuSpec ns3::HeRu::FindOverlappingRu	(	uint16_t	bw,
		RuSpec	referenceRu,
		RuType	searchedRuType
	)

static

Find the RU allocation of the given RU type overlapping the given reference RU allocation.

Note that an assert is generated if the RU allocation is not found.

Parameters

bw	the bandwidth (MHz) of the HE PPDU (20, 40, 80, 160)
referenceRu	the reference RU allocation
searchedRuType	the searched RU type

Returns: the searched RU allocation.

Definition at line 685 of file he-ru.cc.

References DoesOverlap(), GetNRus(), ns3::HeRu::RuSpec::GetPrimary80MHz(), NS_ABORT_MSG, and RU_2x996_TONE.

Referenced by ns3::HePhy::GetCenterFrequencyForNonHePart(), and ns3::HePhy::GetNonOfdmaBand().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ GetBandwidth()

uint16_t ns3::HeRu::GetBandwidth ( RuType ruType )

static

Get the approximate bandwidth occupied by a RU.

Parameters

ruType the RU type

Returns: the approximate bandwidth (in MHz) occupied by the RU

Definition at line 763 of file he-ru.cc.

References NS_ABORT_MSG, RU_106_TONE, RU_242_TONE, RU_26_TONE, RU_2x996_TONE, RU_484_TONE, RU_52_TONE, and RU_996_TONE.

Referenced by ns3::WifiTxVector::DeriveRuAllocation(), ns3::WifiPhyOperatingChannel::Get20MHzIndicesCoveringRu(), ns3::HePhy::GetChannelWidthAndBand(), ns3::EhtPhy::GetDataRateFromTxVector(), ns3::HePhy::GetDataRateFromTxVector(), ns3::HePhy::GetNonOfdmaWidth(), ns3::EhtPhy::GetPhyRateFromTxVector(), ns3::HePhy::GetPhyRateFromTxVector(), ns3::HePhy::GetTxPowerSpectralDensity(), and ns3::HePpdu::SetHeMuUserInfos().

Here is the caller graph for this function:

◆ GetCentral26TonesRus()

std::vector< HeRu::RuSpec > ns3::HeRu::GetCentral26TonesRus	(	uint16_t	bw,
		HeRu::RuType	ruType
	)

static

Get the set of 26-tone RUs that can be additionally allocated if the given bandwidth is split in RUs of the given type.

Parameters

bw	the bandwidth (MHz) of the HE PPDU (20, 40, 80, 160)
ruType	the RU type (number of tones)

Returns: the set of 26-tone RUs that can be additionally allocated

Definition at line 541 of file he-ru.cc.

References RU_106_TONE, RU_242_TONE, RU_26_TONE, RU_484_TONE, and RU_52_TONE.

◆ GetEqualizedRuAllocation()

uint8_t ns3::HeRu::GetEqualizedRuAllocation	(	RuType	ruType,
		bool	isOdd
	)

static

Get the RU_ALLOCATION value for equal size RUs.

Parameters

ruType	equal size RU type (generated by GetEqualSizedRusForStations)
isOdd	if number of stations is an odd number

Returns: RU_ALLOCATION value

Definition at line 421 of file he-ru.cc.

References RU_106_TONE, RU_242_TONE, RU_26_TONE, RU_484_TONE, and RU_52_TONE.

Referenced by ns3::WifiTxVector::DeriveRuAllocation().

Here is the caller graph for this function:

◆ GetEqualSizedRusForStations()

HeRu::RuType ns3::HeRu::GetEqualSizedRusForStations	(	uint16_t	bandwidth,
		std::size_t &	nStations,
		std::size_t &	nCentral26TonesRus
	)

static

Given the channel bandwidth and the number of stations candidate for being assigned an RU, maximize the number of candidate stations that can be assigned an RU subject to the constraint that all the stations must be assigned an RU of the same size (in terms of number of tones).

Parameters

	bandwidth	the channel bandwidth in MHz
	nStations	the number of candidate stations. On return, it is set to the number of stations that are assigned an RU
[out]	nCentral26TonesRus	the number of additional 26-tone RUs that can be allocated if the returned RU size is greater than 26 tones

Returns: the RU type

Definition at line 813 of file he-ru.cc.

References m_heRuSubcarrierGroups, NS_ABORT_IF, RU_106_TONE, RU_242_TONE, RU_2x996_TONE, RU_484_TONE, and RU_52_TONE.

Referenced by ns3::RrMultiUserScheduler::GetTxVectorForUlMu(), and ns3::RrMultiUserScheduler::TrySendingDlMuPpdu().

Here is the caller graph for this function:

◆ GetNRus()

std::size_t ns3::HeRu::GetNRus	(	uint16_t	bw,
		RuType	ruType
	)

static

Get the number of distinct RUs of the given type (number of tones) available in a HE PPDU of the given bandwidth.

Parameters

bw	the bandwidth (MHz) of the HE PPDU (20, 40, 80, 160)
ruType	the RU type (number of tones)

Returns: the number of distinct RUs available

Definition at line 491 of file he-ru.cc.

References m_heRuSubcarrierGroups, and RU_2x996_TONE.

Referenced by FindOverlappingRu(), ns3::WifiPhyOperatingChannel::Get20MHzIndicesCoveringRu(), ns3::SpectrumWifiPhy::GetHeRuBands(), ns3::HeRu::RuSpec::GetPhyIndex(), and GetSubcarrierGroup().

Here is the caller graph for this function:

◆ GetRusOfType()

std::vector< HeRu::RuSpec > ns3::HeRu::GetRusOfType	(	uint16_t	bw,
		HeRu::RuType	ruType
	)

static

Get the set of distinct RUs of the given type (number of tones) available in a HE PPDU of the given bandwidth.

Parameters

bw	the bandwidth (MHz) of the HE PPDU (20, 40, 80, 160)
ruType	the RU type (number of tones)

Returns: the set of distinct RUs available

Definition at line 511 of file he-ru.cc.

References m_heRuSubcarrierGroups, NS_ASSERT, and RU_2x996_TONE.

Referenced by ns3::WifiTxVector::DeriveRuAllocation(), and ns3::HePpdu::SetHeMuUserInfos().

Here is the caller graph for this function:

◆ GetRuSpecs()

std::vector< HeRu::RuSpec > ns3::HeRu::GetRuSpecs ( uint8_t ruAllocation )

static

Get the RU specs based on RU_ALLOCATION.

Parameters

ruAllocation 8 bit RU_ALLOCATION value

Returns: RU spec associated with the RU_ALLOCATION

Definition at line 393 of file he-ru.cc.

References m_heRuAllocations, and NS_FATAL_ERROR.

Referenced by ns3::HePpdu::SetHeMuUserInfos().

Here is the caller graph for this function:

◆ GetRuType()

HeRu::RuType ns3::HeRu::GetRuType ( uint16_t bandwidth )

static

Get the RU corresponding to the approximate bandwidth.

Parameters

bandwidth the approximate bandwidth (in MHz) occupied by the RU

Returns: the RU type

Definition at line 788 of file he-ru.cc.

References NS_ABORT_MSG, RU_106_TONE, RU_242_TONE, RU_26_TONE, RU_2x996_TONE, RU_484_TONE, RU_52_TONE, and RU_996_TONE.

Referenced by ns3::HePhy::GetCenterFrequencyForNonHePart(), and ns3::HePhy::GetNonOfdmaBand().

Here is the caller graph for this function:

◆ GetSubcarrierGroup()

HeRu::SubcarrierGroup ns3::HeRu::GetSubcarrierGroup	(	uint16_t	bw,
		RuType	ruType,
		std::size_t	phyIndex
	)

static

Get the subcarrier group of the RU having the given PHY index among all the RUs of the given type (number of tones) available in a HE PPDU of the given bandwidth.

A subcarrier group is defined as one or more pairs indicating the lowest frequency index and the highest frequency index. Note that for channel width of 160 MHz the returned range is relative to the 160 MHz channel (i.e. -1012 to 1012). The PHY index parameter is used to distinguish between lower and higher 80 MHz subchannels.

Parameters

bw	the bandwidth (MHz) of the HE PPDU (20, 40, 80, 160)
ruType	the RU type (number of tones)
phyIndex	the PHY index (starting at 1) of the RU

Returns: the subcarrier range of the specified RU

Definition at line 587 of file he-ru.cc.

References GetNRus(), m_heRuSubcarrierGroups, NS_ABORT_MSG_IF, and RU_2x996_TONE.

Referenced by DoesOverlap(), ns3::SpectrumWifiPhy::GetHeRuBands(), ns3::HePhy::GetNonOfdmaBand(), ns3::HePhy::GetRuBandForRx(), ns3::HePhy::GetRuBandForTx(), and ns3::HeRu::RuSpecCompare::operator()().

Here is the call graph for this function:

Here is the caller graph for this function:

Member Data Documentation

◆ EMPTY_242_TONE_RU

constexpr uint8_t ns3::HeRu::EMPTY_242_TONE_RU = 113

staticconstexpr

Empty 242-tone RU identifier.

Definition at line 311 of file he-ru.h.

Referenced by ns3::WifiTxVector::DeriveRuAllocation().

◆ m_heRuAllocations

const HeRu::RuAllocationMap ns3::HeRu::m_heRuAllocations

static

Table 27-26 of IEEE 802.11ax-2021.

Definition at line 297 of file he-ru.h.

Referenced by GetRuSpecs().

◆ m_heRuSubcarrierGroups

const HeRu::SubcarrierGroups ns3::HeRu::m_heRuSubcarrierGroups

static

Subcarrier groups for all RUs (with indices being applicable to primary 80 MHz channel)

Definition at line 291 of file he-ru.h.

Referenced by GetEqualSizedRusForStations(), GetNRus(), GetRusOfType(), and GetSubcarrierGroup().

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

src/wifi/model/he/he-ru.h
src/wifi/model/he/he-ru.cc

Classes

Public Types

Static Public Member Functions

Static Public Attributes

Detailed Description

Member Typedef Documentation

◆ BwTonesPair

◆ RuAllocationMap

◆ SubcarrierGroup

◆ SubcarrierGroups

◆ SubcarrierRange

Member Enumeration Documentation

◆ RuType

Member Function Documentation

◆ DoesOverlap() [1/2]

◆ DoesOverlap() [2/2]

◆ FindOverlappingRu()

◆ GetBandwidth()

◆ GetCentral26TonesRus()

◆ GetEqualizedRuAllocation()

◆ GetEqualSizedRusForStations()

◆ GetNRus()

◆ GetRusOfType()

◆ GetRuSpecs()

◆ GetRuType()

◆ GetSubcarrierGroup()

Member Data Documentation

◆ EMPTY_242_TONE_RU

◆ m_heRuAllocations

◆ m_heRuSubcarrierGroups