Rakhmatov Vrudhula non-linear battery model. More...
#include <rv-battery-model.h>
Public Member Functions | |
double | GetAlpha (void) const |
double | GetBatteryLevel (void) |
double | GetBeta (void) const |
double | GetCutoffVoltage (void) const |
virtual double | GetEnergyFraction (void) |
virtual double | GetInitialEnergy (void) const |
Time | GetLifetime (void) const |
int | GetNumOfTerms (void) const |
double | GetOpenCircuitVoltage (void) const |
virtual double | GetRemainingEnergy (void) |
Time | GetSamplingInterval (void) const |
virtual double | GetSupplyVoltage (void) const |
void | SetAlpha (double alpha) |
Sets the alpha value for the battery model. More... | |
void | SetBeta (double beta) |
Sets the beta value for the battery model. More... | |
void | SetCutoffVoltage (double voltage) |
Sets cutoff voltage of battery. More... | |
void | SetNumOfTerms (int num) |
Sets the number of terms of the infinite sum for estimating battery level. More... | |
void | SetOpenCircuitVoltage (double voltage) |
Sets open circuit voltage of battery. More... | |
void | SetSamplingInterval (Time interval) |
virtual void | UpdateEnergySource (void) |
Public Member Functions inherited from ns3::EnergySource | |
void | AppendDeviceEnergyModel (Ptr< DeviceEnergyModel > deviceEnergyModelPtr) |
void | DisposeDeviceModels (void) |
DeviceEnergyModelContainer | FindDeviceEnergyModels (TypeId tid) |
DeviceEnergyModelContainer | FindDeviceEnergyModels (std::string name) |
Ptr< Node > | GetNode (void) const |
void | InitializeDeviceModels (void) |
void | SetNode (Ptr< Node > node) |
Sets pointer to node containing this EnergySource. More... | |
Public Member Functions inherited from ns3::Object | |
void | AggregateObject (Ptr< Object > other) |
void | Dispose (void) |
AggregateIterator | GetAggregateIterator (void) const |
virtual TypeId | GetInstanceTypeId (void) const |
template<typename T > | |
Ptr< T > | GetObject (void) const |
template<typename T > | |
Ptr< T > | GetObject (TypeId tid) const |
void | Initialize (void) |
Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter > | |
SimpleRefCount (const SimpleRefCount &o) | |
uint32_t | GetReferenceCount (void) const |
SimpleRefCount & | operator= (const SimpleRefCount &o) |
void | Ref (void) const |
void | Unref (void) const |
Public Member Functions inherited from ns3::ObjectBase | |
void | GetAttribute (std::string name, AttributeValue &value) const |
bool | GetAttributeFailSafe (std::string name, AttributeValue &attribute) const |
void | SetAttribute (std::string name, const AttributeValue &value) |
bool | SetAttributeFailSafe (std::string name, const AttributeValue &value) |
bool | TraceConnect (std::string name, std::string context, const CallbackBase &cb) |
bool | TraceConnectWithoutContext (std::string name, const CallbackBase &cb) |
bool | TraceDisconnect (std::string name, std::string context, const CallbackBase &cb) |
bool | TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb) |
Static Public Member Functions | |
static TypeId | GetTypeId (void) |
Static Public Member Functions inherited from ns3::EnergySource | |
static TypeId | GetTypeId (void) |
Static Public Member Functions inherited from ns3::Object | |
static TypeId | GetTypeId (void) |
Static Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter > | |
static void | Cleanup (void) |
Static Public Member Functions inherited from ns3::ObjectBase | |
static TypeId | GetTypeId (void) |
Private Member Functions | |
double | Discharge (double load, Time t) |
Discharges the battery. More... | |
virtual void | DoDispose (void) |
Defined in ns3::Object. | |
virtual void | DoInitialize (void) |
Defined in ns3::Object. | |
void | HandleEnergyDrainedEvent (void) |
double | RvModelAFunction (Time t, Time sk, Time sk_1, double beta) |
RV model A function. More... | |
Private Attributes | |
double | m_alpha |
TracedValue< double > | m_batteryLevel |
double | m_beta |
uint64_t | m_counter |
EventId | m_currentSampleEvent |
double | m_cutoffVoltage |
Time | m_lastSampleTime |
TracedValue< Time > | m_lifetime |
std::vector< double > | m_load |
int | m_numOfTerms |
double | m_openCircuitVoltage |
double | m_previousLoad |
Time | m_samplingInterval |
std::vector< Time > | m_timeStamps |
Additional Inherited Members | |
Protected Member Functions inherited from ns3::EnergySource | |
void | BreakDeviceEnergyModelRefCycle (void) |
double | CalculateTotalCurrent (void) |
void | NotifyEnergyDrained (void) |
Protected Member Functions inherited from ns3::Object | |
Object (const Object &o) | |
virtual void | NotifyNewAggregate (void) |
Protected Member Functions inherited from ns3::ObjectBase | |
void | ConstructSelf (const AttributeConstructionList &attributes) |
virtual void | NotifyConstructionCompleted (void) |
Rakhmatov Vrudhula non-linear battery model.
This (energy source) model implements an analytical non-linear battery model. It is capable of capturing load capacity and recovery effects of batteries. Batteries are characterized by 2 parameters, alpha and beta, which can both be obtained from the discharge curve of the batteries.
The model is developed by Daler Rakhmatov & Sarma Vrudhula in: "Battery Lifetime Prediction for Energy-Aware Computing" and "An Analytical High-Level Battery Model for Use in Energy Management of Portable Electronic Systems".
The real-time algorithm is developed by Matthias Handy & Dirk Timmermann in: "Simulation of Mobile Wireless Networks with Accurate Modeling of non-linear battery effects". The real-time algorithm is modified by the authors of this code for improved accuracy and reduced computation (sampling) overhead.
Doxygen introspection did not find any typical Config paths.
Definition at line 50 of file rv-battery-model.h.
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private |
Discharges the battery.
load | Load value (total current form devices, in mA). |
t | Time stamp of the load value. |
Discharge function calculates a value which is then compared to the alpha value to determine if the battery is dead. It will also update the battery level.
Note that the load value passed to Discharge has to be in mA.
Definition at line 313 of file rv-battery-model.cc.
References NS_ASSERT, NS_LOG_FUNCTION, RvModelAFunction(), and ns3::Seconds().
Referenced by UpdateEnergySource().
double ns3::RvBatteryModel::GetAlpha | ( | void | ) | const |
Definition at line 235 of file rv-battery-model.cc.
References NS_LOG_FUNCTION.
double ns3::RvBatteryModel::GetBatteryLevel | ( | void | ) |
Definition at line 257 of file rv-battery-model.cc.
References m_batteryLevel, NS_LOG_FUNCTION, and UpdateEnergySource().
Referenced by GetEnergyFraction().
double ns3::RvBatteryModel::GetBeta | ( | void | ) | const |
Definition at line 250 of file rv-battery-model.cc.
References NS_LOG_FUNCTION.
double ns3::RvBatteryModel::GetCutoffVoltage | ( | void | ) | const |
Definition at line 220 of file rv-battery-model.cc.
References NS_LOG_FUNCTION.
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Implements GetEnergyFraction. For the RV battery model, energy fraction is equivalent to battery level.
Implements ns3::EnergySource.
Definition at line 125 of file rv-battery-model.cc.
References GetBatteryLevel(), and NS_LOG_FUNCTION.
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Implements GetInitialEnergy.
Implements ns3::EnergySource.
Definition at line 102 of file rv-battery-model.cc.
References GetSupplyVoltage(), and NS_LOG_FUNCTION.
Time ns3::RvBatteryModel::GetLifetime | ( | void | ) | const |
Definition at line 265 of file rv-battery-model.cc.
References NS_LOG_FUNCTION.
Referenced by BatteryLifetimeTest::ConstantLoadTest(), and BatteryLifetimeTest::VariableLoadTest().
int ns3::RvBatteryModel::GetNumOfTerms | ( | void | ) | const |
Definition at line 279 of file rv-battery-model.cc.
References NS_LOG_FUNCTION.
double ns3::RvBatteryModel::GetOpenCircuitVoltage | ( | void | ) | const |
Definition at line 205 of file rv-battery-model.cc.
References NS_LOG_FUNCTION.
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Implements GetRemainingEnergy.
Implements ns3::EnergySource.
Definition at line 117 of file rv-battery-model.cc.
References GetSupplyVoltage(), m_batteryLevel, NS_LOG_FUNCTION, and UpdateEnergySource().
Time ns3::RvBatteryModel::GetSamplingInterval | ( | void | ) | const |
Definition at line 190 of file rv-battery-model.cc.
References m_samplingInterval, and NS_LOG_FUNCTION.
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Implements GetSupplyVoltage.
Implements ns3::EnergySource.
Definition at line 109 of file rv-battery-model.cc.
References NS_LOG_FUNCTION.
Referenced by GetInitialEnergy(), and GetRemainingEnergy().
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Handles the remaining energy going to zero event. This function notifies all the energy models aggregated to the node about the energy being depleted. Each energy model is then responsible for its own handler.
Definition at line 305 of file rv-battery-model.cc.
References ns3::EnergySource::NotifyEnergyDrained(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.
Referenced by UpdateEnergySource().
RV model A function.
t | Current time. |
sk | Time stamp in array position k |
sk_1 | Time stamp in array position k-1 |
beta | Beta value used by the battery model. |
This function computes alpha value using the recorded load profile.
Definition at line 363 of file rv-battery-model.cc.
References ns3::Time::GetSeconds(), and NS_LOG_FUNCTION.
Referenced by Discharge().
void ns3::RvBatteryModel::SetAlpha | ( | double | alpha | ) |
Sets the alpha value for the battery model.
alpha | Alpha. |
Definition at line 227 of file rv-battery-model.cc.
References NS_ASSERT, and NS_LOG_FUNCTION.
void ns3::RvBatteryModel::SetBeta | ( | double | beta | ) |
Sets the beta value for the battery model.
beta | Beta. |
Definition at line 242 of file rv-battery-model.cc.
References NS_ASSERT, and NS_LOG_FUNCTION.
void ns3::RvBatteryModel::SetCutoffVoltage | ( | double | voltage | ) |
Sets cutoff voltage of battery.
voltage | Cutoff voltage. |
Definition at line 212 of file rv-battery-model.cc.
References NS_ASSERT, and NS_LOG_FUNCTION.
void ns3::RvBatteryModel::SetNumOfTerms | ( | int | num | ) |
Sets the number of terms of the infinite sum for estimating battery level.
num | Number of terms. |
Definition at line 272 of file rv-battery-model.cc.
References NS_LOG_FUNCTION.
void ns3::RvBatteryModel::SetOpenCircuitVoltage | ( | double | voltage | ) |
Sets open circuit voltage of battery.
voltage | Open circuit voltage. |
Definition at line 197 of file rv-battery-model.cc.
References NS_ASSERT, and NS_LOG_FUNCTION.
void ns3::RvBatteryModel::SetSamplingInterval | ( | Time | interval | ) |
interval | Energy update interval. |
This function sets the interval between each energy update.
Definition at line 183 of file rv-battery-model.cc.
References m_samplingInterval, and NS_LOG_FUNCTION.
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Implements UpdateEnergySource. This function samples the total load (total current) from all devices to discharge the battery.
Implements ns3::EnergySource.
Definition at line 132 of file rv-battery-model.cc.
References ns3::EnergySource::CalculateTotalCurrent(), ns3::EventId::Cancel(), Discharge(), HandleEnergyDrainedEvent(), ns3::Simulator::IsFinished(), m_batteryLevel, m_samplingInterval, ns3::Simulator::Now(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and ns3::Simulator::Schedule().
Referenced by DoInitialize(), GetBatteryLevel(), and GetRemainingEnergy().
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Battery level is defined as: output of Discharge function / alpha value
The output of Discharge function is an estimated charge consumption of the battery.
The alpha value is the amount of charges stored in the battery, or battery capacity (in Coulomb).
When the battery is fully charged (no charge is consumed from the battery) the battery level is 1. When the battery is fully discharged, the battery level is 0.
NOTE Note that the definition in Timmermann's paper is the inverse of this definition. In the paper, battery level = 1 when the battery is drained.
Definition at line 248 of file rv-battery-model.h.
Referenced by GetBatteryLevel(), GetRemainingEnergy(), and UpdateEnergySource().
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(1 / sampling interval) = sampling frequency
Definition at line 253 of file rv-battery-model.h.
Referenced by GetSamplingInterval(), SetSamplingInterval(), and UpdateEnergySource().