5G-LENA: ns3::NrMacSchedulerUeInfoAi Class Reference

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UE representation for a AI-based scheduler. More...

#include "nr-mac-scheduler-ue-info-ai.h"

Inheritance diagram for ns3::NrMacSchedulerUeInfoAi:

Collaboration diagram for ns3::NrMacSchedulerUeInfoAi:

Classes
struct	LcObservation
	A struct for an observation of a flow. More...

Public Types
typedef Callback< void, const std::vector< LcObservation > &, bool, float, const std::string &, const UpdateAllUeWeightsFn & >	NotifyCb
	A callback type for notifying with specific parameters.

typedef std::unordered_map< uint8_t, Weights >	UeWeightsMap
	A hash map for UE weights.

typedef std::function< void(const UeWeightsMap &)>	UpdateAllUeWeightsFn
	A function type for updating the weights of all UEs.

typedef std::unordered_map< uint8_t, double >	Weights
	A hash map for weights.

Public Types inherited from ns3::NrMacSchedulerUeInfo
typedef std::function< NrMacHarqVector &(const UePtr &ue)>	GetHarqVectorFn

typedef std::function< std::unordered_map< uint8_t, LCGPtr > &(const UePtr &ue)>	GetLCGFn

typedef std::function< uint32_t()>	GetRbPerRbgFn

enum class	McsCsiSource { AVG_MCS , AVG_SPEC_EFF , AVG_SINR , WIDEBAND_MCS }

Public Member Functions
	NrMacSchedulerUeInfoAi (float alpha, uint16_t rnti, BeamId beamId, const GetRbPerRbgFn &fn)
	NrMacSchedulerUeInfoAi constructor.

std::vector< LcObservation >	GetDlObservation ()
	Get the current observation for downlink.

float	GetDlReward ()
	Get the reward for downlink.

std::vector< LcObservation >	GetUlObservation ()
	Get the current observation for uplink.

float	GetUlReward ()
	Get the reward for uplink.

void	ResetDlSchedInfo () override
	Reset DL AI scheduler info.

void	ResetUlSchedInfo () override
	Reset UL AI scheduler info.

void	UpdateDlWeights (Weights &weights)
	Update the weights for downlink.

void	UpdateUlWeights (Weights &weights)
	Update the weights for uplink.

Public Member Functions inherited from ns3::NrMacSchedulerUeInfoQos
	NrMacSchedulerUeInfoQos (float alpha, uint16_t rnti, BeamId beamId, const GetRbPerRbgFn &fn)
	NrMacSchedulerUeInfoQos constructor.

void	CalculatePotentialTPutDl (const NrMacSchedulerNs3::FTResources &assignableInIteration)
	Calculate the Potential throughput for downlink.

void	CalculatePotentialTPutUl (const NrMacSchedulerNs3::FTResources &assignableInIteration)
	Calculate the Potential throughput for uplink.

void	ResetDlMetric () override
	Reset the DL avg Th to the last value.

void	ResetDlSchedInfo () override
	Reset DL QoS scheduler info.

void	ResetUlMetric () override
	Reset the UL avg Th to the last value.

void	ResetUlSchedInfo () override
	Reset UL QoS scheduler info.

void	UpdateDlQosMetric (const NrMacSchedulerNs3::FTResources &totAssigned, double timeWindow)
	Update the QoS metric for downlink.

void	UpdateUlQosMetric (const NrMacSchedulerNs3::FTResources &totAssigned, double timeWindow)
	Update the QoS metric for uplink.

Public Member Functions inherited from ns3::NrMacSchedulerUeInfo
	NrMacSchedulerUeInfo ()=delete
	Default Constructor (deleted)

	NrMacSchedulerUeInfo (uint16_t rnti, BeamId beamId, const GetRbPerRbgFn &fn)
	Create a new UE representation.

virtual	~NrMacSchedulerUeInfo ()
	~NrMacSchedulerUeInfo deconstructor

uint8_t	GetDlMcs () const
	Get the downlink MCS, given by the wideband CQI, or the sub-band CQIs of the currently allocated RBGs, if available.

uint32_t	GetTotalDlBuffer () const

void	ReleaseLC (uint8_t lcid)

virtual void	UpdateDlMetric ()
	Update DL metrics after resources have been assigned.

virtual void	UpdateUlMetric ()
	Update UL metrics after resources have been assigned.

Static Public Member Functions
static double	CalculateDlWeight (const NrMacSchedulerNs3::UePtrAndBufferReq &ue)
	Calculate the weight of a UE in the downlink.

static double	CalculateUlWeight (const NrMacSchedulerNs3::UePtrAndBufferReq &ue)
	Calculate the weight of a UE in the uplink.

static bool	CompareUeWeightsDl (const NrMacSchedulerNs3::UePtrAndBufferReq &lue, const NrMacSchedulerNs3::UePtrAndBufferReq &rue)
	comparison function object (i.e. an object that satisfies the requirements of Compare) which returns true if the first argument is less than (i.e. is ordered before) the second.

static bool	CompareUeWeightsUl (const NrMacSchedulerNs3::UePtrAndBufferReq &lue, const NrMacSchedulerNs3::UePtrAndBufferReq &rue)
	comparison function object (i.e. an object that satisfies the requirements of Compare) which returns true if the first argument is less than (i.e. is ordered before) the second.

Static Public Member Functions inherited from ns3::NrMacSchedulerUeInfoQos
static double	CalculateDelayBudgetFactor (uint64_t pdb, uint16_t hol)
	This function calculates the Delay Budget Factor for the case of DC-GBR LC. This value will then be used for the calculation of the QoS metric (weight). Notice that in order to avoid the case that a packet has not been dropped when HOL >= PDB, even though it is in this state (currently our code does not implement packet drop by default), we give very high priority to this packet. We do this by considering a very small value for the denominator (i.e. (PDB - HOL) = 0.1).

static uint8_t	CalculateDlMinPriority (const NrMacSchedulerNs3::UePtrAndBufferReq &ue)
	This function calculates the min Priority for the DL.

static double	CalculateDlWeight (const NrMacSchedulerNs3::UePtrAndBufferReq &ue)
	comparison function object (i.e. an object that satisfies the requirements of Compare) which returns true if the first argument is less than (i.e. is ordered before) the second.

static uint8_t	CalculateUlMinPriority (const NrMacSchedulerNs3::UePtrAndBufferReq &ue)
	This function calculates the min Priority for the UL.

static bool	CompareUeWeightsDl (const NrMacSchedulerNs3::UePtrAndBufferReq &lue, const NrMacSchedulerNs3::UePtrAndBufferReq &rue)
	comparison function object (i.e. an object that satisfies the requirements of Compare) which returns true if the first argument is less than (i.e. is ordered before) the second.

static bool	CompareUeWeightsUl (const NrMacSchedulerNs3::UePtrAndBufferReq &lue, const NrMacSchedulerNs3::UePtrAndBufferReq &rue)
	comparison function object (i.e. an object that satisfies the requirements of Compare) which returns true if the first argument is less than (i.e. is ordered before) the second.

Static Public Member Functions inherited from ns3::NrMacSchedulerUeInfo
static NrMacHarqVector &	GetDlHarqVector (const UePtr &ue)
	GetDlHarqVector.

static std::unordered_map< uint8_t, LCGPtr > &	GetDlLCG (const UePtr &ue)
	GetDlLCG.

static uint8_t &	GetDlMcs (const UePtr &ue)
	GetDlMcs.

static std::vector< uint16_t > &	GetDlRBG (const UePtr &ue)
	GetDlRBG.

static std::vector< uint8_t > &	GetDlSym (const UePtr &ue)
	GetDlSym.

static uint32_t &	GetDlTBS (const UePtr &ue)
	GetDlTBS.

static NrMacHarqVector &	GetUlHarqVector (const UePtr &ue)
	GetUlHarqVector.

static std::unordered_map< uint8_t, LCGPtr > &	GetUlLCG (const UePtr &ue)
	GetUlLCG.

static uint8_t &	GetUlMcs (const UePtr &ue)
	GetUlMcs.

static std::vector< uint16_t > &	GetUlRBG (const UePtr &ue)
	GetUlRBG.

static std::vector< uint8_t > &	GetUlSym (const UePtr &ue)
	GetUlSym.

static uint32_t &	GetUlTBS (const UePtr &ue)
	GetUlTBS.

static void	PrintLcInfo (uint16_t ue, uint8_t lcgId, uint8_t lcId, uint8_t cqi, uint8_t P, uint8_t minP)
	Prints information related to the QCI of a UEs LC.

Public Attributes
Weights	m_weightsDl
	Weights assigned to each flow for a UE in the downlink.

Weights	m_weightsUl
	Weights assigned to each flow for a UE in the uplink.

Public Attributes inherited from ns3::NrMacSchedulerUeInfoQos
float	m_alpha {0.0}
	PF fairness metric.

double	m_avgTputDl {0.0}
	Average throughput in downlink during all the slots.

double	m_avgTputUl {0.0}
	Average throughput in uplink during all the slots.

double	m_currTputDl {0.0}
	Current slot throughput in downlink.

double	m_currTputUl {0.0}
	Current slot throughput in uplink.

double	m_lastAvgTputDl {0.0}
	Last average throughput in downlink.

double	m_lastAvgTputUl {0.0}
	Last average throughput in uplink.

double	m_potentialTputDl {0.0}

double	m_potentialTputUl {0.0}

Public Attributes inherited from ns3::NrMacSchedulerUeInfo
BeamId	m_beamId
	Beam ID of the UE (kept updated as much as possible by MAC)

Ptr< NrAmc >	m_dlAmc
	AMC instance of scheduler associated with DL.

CqiInfo	m_dlCqi
	DL CQI information.

NrMacHarqVector	m_dlHarq
	HARQ process vector for DL.

std::unordered_map< uint8_t, LCGPtr >	m_dlLCG
	DL LCG.

uint8_t	m_dlMcs {0}
	DL MCS.

uint32_t	m_dlMRBRetx {0}

Ptr< const ComplexMatrixArray >	m_dlPrecMats {nullptr}
	DL Precoding matrices.

uint8_t	m_dlRank {1}
	DL rank (number of MIMO layers)

std::vector< uint16_t >	m_dlRBG
	DL Resource Block Group assigned in this slot.

std::vector< SbMcsInfo >	m_dlSbMcsInfo

std::vector< uint8_t >	m_dlSym
	Corresponding symbol of m_dlRBG in this slot.

uint32_t	m_dlTbSize {0}

std::optional< uint8_t >	m_fhMaxMcsAssignable
	Maximum DL MCS assignable due to FH limitations.

McsCsiSource	m_mcsCsiSource
	Source of MCS computation based on CSI feedback.

std::vector< uint8_t >	m_rbgToSb
	Precomputed RBG to SB mapping.

uint16_t	m_rnti {0}
	RNTI of the UE.

uint32_t	m_srsOffset {0}
	SRS offset.

uint32_t	m_srsPeriodicity {0}
	SRS periodicity.

uint8_t	m_startMcsDlUe {0}
	Starting DL MCS to be used.

Ptr< NrAmc >	m_ulAmc
	AMC instance of scheduler associated with UL.

CqiInfo	m_ulCqi
	UL CQI information.

NrMacHarqVector	m_ulHarq
	HARQ process vector for UL.

std::unordered_map< uint8_t, LCGPtr >	m_ulLCG
	UL LCG.

uint8_t	m_ulMcs {0}
	UL MCS.

uint32_t	m_ulMRBRetx {0}

Ptr< const ComplexMatrixArray >	m_ulPrecMats {nullptr}
	UL Precoding matrices.

uint8_t	m_ulRank {1}
	UL rank (number of MIMO layers)

std::vector< uint16_t >	m_ulRBG
	UL Resource Block Group assigned in this slot.

std::vector< uint8_t >	m_ulSym
	Corresponding symbol of m_ulRBG in this slot.

uint32_t	m_ulTbSize {0}

Additional Inherited Members
Protected Member Functions inherited from ns3::NrMacSchedulerUeInfo
uint32_t	GetNumRbPerRbg () const
	Retrieve the number of RB per RBG.

Detailed Description

UE representation for a AI-based scheduler.

The representation stores the weights of a UE, which are also referred to as actions in the RL model, in response to sending the predefined observation. The observation is a vector of LcObservation, each representing an observation of a flow. In addition to RL-related operations, it updates the metrics in NrMacSchedulerUeInfoQos by inheriting from the NrMacSchedulerUeInfoQos class. In resource allocation per symbol, we can design the reward function of a UE using the QoS metrics.

See also: LcObservation; Weights; NrMacSchedulerUeInfoQos

Definition at line 27 of file nr-mac-scheduler-ue-info-ai.h.

Member Typedef Documentation

◆ NotifyCb

ns3::NrMacSchedulerUeInfoAi::NotifyCb

A callback type for notifying with specific parameters.

This callback takes the following parameters:

An Observation object representing the observations
A boolean value indicating whether the game is over (true) or not (false)
A float value representing the reward
A string value representing extra information
A pointer to a const NrMacSchedulerOfdmaAi instance

Definition at line 97 of file nr-mac-scheduler-ue-info-ai.h.

◆ UeWeightsMap

ns3::NrMacSchedulerUeInfoAi::UeWeightsMap

A hash map for UE weights.

A hash map for UE weights that maps a uint8_t to a Weights. The key is the RNTI, and the value is the Weights of the UE.

Definition at line 57 of file nr-mac-scheduler-ue-info-ai.h.

◆ UpdateAllUeWeightsFn

ns3::NrMacSchedulerUeInfoAi::UpdateAllUeWeightsFn

A function type for updating the weights of all UEs.

Definition at line 79 of file nr-mac-scheduler-ue-info-ai.h.

◆ Weights

ns3::NrMacSchedulerUeInfoAi::Weights

A hash map for weights.

A hash map for weights that maps a pair of uint8_t to a double. The key is the LC ID, and the value is the weight of the LC as a double.

Definition at line 49 of file nr-mac-scheduler-ue-info-ai.h.

Constructor & Destructor Documentation

◆ NrMacSchedulerUeInfoAi()

ns3::NrMacSchedulerUeInfoAi::NrMacSchedulerUeInfoAi	(	float	alpha,
		uint16_t	rnti,
		BeamId	beamId,
		const GetRbPerRbgFn &	fn
	)

inline

NrMacSchedulerUeInfoAi constructor.

Parameters

alpha	The fairness metric
rnti	RNTI of the UE
beamId	BeamId of the UE
fn	A function that tells how many RB per RBG

Definition at line 37 of file nr-mac-scheduler-ue-info-ai.h.

Member Function Documentation

◆ CalculateDlWeight()

static double ns3::NrMacSchedulerUeInfoAi::CalculateDlWeight ( const NrMacSchedulerNs3::UePtrAndBufferReq & ue )

inlinestatic

Calculate the weight of a UE in the downlink.

Parameters

ue the UE

Returns: the weight of the UE

Calculate the weight of a UE in the downlink by iterating over the active LCs of the UE. The weight is calculated as the sum of the weights of the active LCs. The weight of an LC is retrieved from the m_weightsDl map.

Definition at line 227 of file nr-mac-scheduler-ue-info-ai.h.

References m_weightsDl.

Referenced by CompareUeWeightsDl().

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◆ CalculateUlWeight()

static double ns3::NrMacSchedulerUeInfoAi::CalculateUlWeight ( const NrMacSchedulerNs3::UePtrAndBufferReq & ue )

inlinestatic

Calculate the weight of a UE in the uplink.

Parameters

ue the UE

Returns: the weight of the UE

Calculate the weight of a UE in the uplink by iterating over the active LCs of the UE. The weight is calculated as the sum of the weights of the active LCs. The weight of an LC is retrieved from the m_weightsUl map.

Definition at line 275 of file nr-mac-scheduler-ue-info-ai.h.

References m_weightsUl.

Referenced by CompareUeWeightsUl().

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◆ CompareUeWeightsDl()

static bool ns3::NrMacSchedulerUeInfoAi::CompareUeWeightsDl	(	const NrMacSchedulerNs3::UePtrAndBufferReq &	lue,
		const NrMacSchedulerNs3::UePtrAndBufferReq &	rue
	)

inlinestatic

comparison function object (i.e. an object that satisfies the requirements of Compare) which returns true if the first argument is less than (i.e. is ordered before) the second.

Parameters

lue	Left UE
rue	Right UE

Returns: true if the AI metric of the left UE is higher than the right UE

The AI metric is calculated in CalculateDlWeight()

Definition at line 209 of file nr-mac-scheduler-ue-info-ai.h.

References CalculateDlWeight().

Referenced by ns3::NrMacSchedulerOfdmaAi::GetUeCompareDlFn(), and ns3::NrMacSchedulerTdmaAi::GetUeCompareDlFn().

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◆ CompareUeWeightsUl()

static bool ns3::NrMacSchedulerUeInfoAi::CompareUeWeightsUl	(	const NrMacSchedulerNs3::UePtrAndBufferReq &	lue,
		const NrMacSchedulerNs3::UePtrAndBufferReq &	rue
	)

inlinestatic

comparison function object (i.e. an object that satisfies the requirements of Compare) which returns true if the first argument is less than (i.e. is ordered before) the second.

Parameters

lue	Left UE
rue	Right UE

Returns: true if the AI metric of the left UE is higher than the right UE

The AI metric is calculated in CalculateUlWeight()

Definition at line 257 of file nr-mac-scheduler-ue-info-ai.h.

References CalculateUlWeight().

Referenced by ns3::NrMacSchedulerOfdmaAi::GetUeCompareUlFn(), and ns3::NrMacSchedulerTdmaAi::GetUeCompareUlFn().

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◆ GetDlObservation()

std::vector< NrMacSchedulerUeInfoAi::LcObservation > ns3::NrMacSchedulerUeInfoAi::GetDlObservation ( )

Get the current observation for downlink.

Parameters

ue the UE

Returns: a vector of LcObservation with the current observation

Get the current observation for downlink by iterating over the active LCs of the UE. The observation is stored in a vector of LcObservation and each consists of the RNTI, LCG ID, LC ID, QCI, priority, and head-of-line delay of the flow.

Definition at line 16 of file nr-mac-scheduler-ue-info-ai.cc.

References ns3::NrMacSchedulerUeInfo::m_dlLCG, and ns3::NrMacSchedulerUeInfo::m_rnti.

◆ GetDlReward()

float ns3::NrMacSchedulerUeInfoAi::GetDlReward ( )

Get the reward for downlink.

Returns: The reward for the downlink

Calculate the reward for the downlink based on the latest observation and the given weights. The reward is calculated as the sum of the rewards of the active LCs. The reward for an LC ( i ) is calculated as $\text{reward}_{i} = \frac{\text{std::pow}(\text{potentialTput}, \alpha)}{\max(1E-9, \text{avgTput})} \times P_{i} \times \text{HOL}_{i}$ .

@alpha is a fairness metric. ( P ) is the priority associated with the QCI. HOL is the head-of-line delay of the LC. Please note that the throughput is calculated in bit/symbol.

Definition at line 80 of file nr-mac-scheduler-ue-info-ai.cc.

References ns3::NrMacSchedulerUeInfoQos::m_alpha, ns3::NrMacSchedulerUeInfoQos::m_avgTputDl, ns3::NrMacSchedulerUeInfo::m_dlLCG, and ns3::NrMacSchedulerUeInfoQos::m_potentialTputDl.

◆ GetUlObservation()

std::vector< NrMacSchedulerUeInfoAi::LcObservation > ns3::NrMacSchedulerUeInfoAi::GetUlObservation ( )

Get the current observation for uplink.

Parameters

ue the UE

Returns: a vector of LcObservation with the current observation

Get the current observation for uplink by iterating over the active LCs of the UE. The observation is stored in a vector of LcObservation and each consists of the RNTI, LCG ID, LC ID, QCI, priority, and head-of-line delay of the flow.

Definition at line 42 of file nr-mac-scheduler-ue-info-ai.cc.

References ns3::NrMacSchedulerUeInfo::m_rnti, and ns3::NrMacSchedulerUeInfo::m_ulLCG.

◆ GetUlReward()

float ns3::NrMacSchedulerUeInfoAi::GetUlReward ( )

Get the reward for uplink.

Returns: The reward for the uplink

Calculate the reward for the uplink based on the latest observation and the given weights. The reward is calculated as the sum of the rewards of the active LCs. The reward for an LC ( i ) is calculated as $\text{reward}_{i} = \frac{\text{std::pow}(\text{potentialTput}, \alpha)}{\max(1E-9, \text{avgTput})} \times P_{i} \times \text{HOL}_{i}$ .

@alpha is a fairness metric. ( P ) is the priority associated with the QCI. HOL is the head-of-line delay of the LC. Please note that the throughput is calculated in bit/symbol.

Definition at line 104 of file nr-mac-scheduler-ue-info-ai.cc.

References ns3::NrMacSchedulerUeInfoQos::m_alpha, ns3::NrMacSchedulerUeInfoQos::m_avgTputUl, ns3::NrMacSchedulerUeInfoQos::m_potentialTputUl, and ns3::NrMacSchedulerUeInfo::m_ulLCG.

◆ ResetDlSchedInfo()

void ns3::NrMacSchedulerUeInfoAi::ResetDlSchedInfo ( )

inlineoverridevirtual

Reset DL AI scheduler info.

Clear the weights for the downlink. It calls also NrMacSchedulerUeInfoQos::ResetDlSchedInfo.

Reimplemented from ns3::NrMacSchedulerUeInfo.

Definition at line 105 of file nr-mac-scheduler-ue-info-ai.h.

References m_weightsDl, and ns3::NrMacSchedulerUeInfoQos::ResetDlSchedInfo().

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◆ ResetUlSchedInfo()

void ns3::NrMacSchedulerUeInfoAi::ResetUlSchedInfo ( )

inlineoverridevirtual

Reset UL AI scheduler info.

Clear the weights for the uplink. It also calls NrMacSchedulerUeInfoQos::ResetUlSchedInfo.

Reimplemented from ns3::NrMacSchedulerUeInfo.

Definition at line 117 of file nr-mac-scheduler-ue-info-ai.h.

References m_weightsUl, and ns3::NrMacSchedulerUeInfoQos::ResetUlSchedInfo().

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◆ UpdateDlWeights()

void ns3::NrMacSchedulerUeInfoAi::UpdateDlWeights ( NrMacSchedulerUeInfoAi::Weights & weights )

Update the weights for downlink.

Parameters

weights The weights assigned to a UE

Update m_weights by copying the weights assigned to a UE. The weights consist of an unordered_map of (key, value) pairs where the lcId is the key, and the weight of the lcId is the value. The higher the weight, the higher the priority of the flow in scheduling.

Definition at line 68 of file nr-mac-scheduler-ue-info-ai.cc.

References m_weightsDl.

◆ UpdateUlWeights()

void ns3::NrMacSchedulerUeInfoAi::UpdateUlWeights ( NrMacSchedulerUeInfoAi::Weights & weights )

Update the weights for uplink.

Parameters

weights the weights assigned to a UE

Update m_weights by copying the weights assigned to a UE. The weights consist of an unordered_map of (key, value) pairs where the combination of lcgId and lcId is the key, and the weight of the lcId is the value. The higher the weight, the higher the priority of the flow in scheduling.

Definition at line 74 of file nr-mac-scheduler-ue-info-ai.cc.

References m_weightsUl.

Member Data Documentation

◆ m_weightsDl

Weights ns3::NrMacSchedulerUeInfoAi::m_weightsDl

Weights assigned to each flow for a UE in the downlink.

Definition at line 295 of file nr-mac-scheduler-ue-info-ai.h.

Referenced by CalculateDlWeight(), ResetDlSchedInfo(), and UpdateDlWeights().

◆ m_weightsUl

Weights ns3::NrMacSchedulerUeInfoAi::m_weightsUl

Weights assigned to each flow for a UE in the uplink.

Definition at line 296 of file nr-mac-scheduler-ue-info-ai.h.

Referenced by CalculateUlWeight(), ResetUlSchedInfo(), and UpdateUlWeights().

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

Classes

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ NotifyCb

◆ UeWeightsMap

◆ UpdateAllUeWeightsFn

◆ Weights

Constructor & Destructor Documentation

◆ NrMacSchedulerUeInfoAi()

Member Function Documentation

◆ CalculateDlWeight()

◆ CalculateUlWeight()

◆ CompareUeWeightsDl()

◆ CompareUeWeightsUl()

◆ GetDlObservation()

◆ GetDlReward()

◆ GetUlObservation()

◆ GetUlReward()

◆ ResetDlSchedInfo()

◆ ResetUlSchedInfo()

◆ UpdateDlWeights()

◆ UpdateUlWeights()

Member Data Documentation

◆ m_weightsDl

◆ m_weightsUl