Class for representing data rates. More...

#include "data-rate.h"

Public Member Functions
	DataRate ()

	DataRate (uint64_t bps)
	Integer constructor. More...

	DataRate (std::string rate)
	String constructor. More...

Time	CalculateBitsTxTime (uint32_t bits) const
	Calculate transmission time. More...

Time	CalculateBytesTxTime (uint32_t bytes) const
	Calculate transmission time. More...

NS_DEPRECATED double	CalculateTxTime (uint32_t bytes) const
	Calculate transmission time. More...

uint64_t	GetBitRate () const
	Get the underlying bitrate. More...

bool	operator!= (const DataRate &rhs) const

bool	operator< (const DataRate &rhs) const

bool	operator<= (const DataRate &rhs) const

bool	operator== (const DataRate &rhs) const

bool	operator> (const DataRate &rhs) const

bool	operator>= (const DataRate &rhs) const

Static Private Member Functions
static bool	DoParse (const std::string s, uint64_t *v)
	Parse a string representing a DataRate into an uint64_t. More...

Private Attributes
uint64_t	m_bps
	data rate [bps] More...

Friends
std::istream &	operator>> (std::istream &is, DataRate &rate)
	Stream extraction operator. More...

Detailed Description

Class for representing data rates.

Allows for natural and familiar use of data rates. Allows construction from strings, natural multiplication e.g.:

DataRate x("56kbps");
double nBits = x*ns3::Seconds (19.2);
uint32_t nBytes = 20;
Time txtime = x.CalculateBytesTxTime (nBytes);

This class also supports the regular comparison operators <, >, <=, >=, ==, and !=

Data rate specifiers consist of

A numeric value,
An optional multiplier prefix and
A unit.

Whitespace is allowed but not required between the numeric value and multipler or unit.

Supported multiplier prefixes:

Prefix	Value
"k", "K"	1000
"Ki"	1024
"M"	1000000
"Mi"	1024 Ki
"G"	10^9
"Gi "	1024 Mi

Supported unit strings:

Symbol	Meaning
"b"	bits
"B"	8-bit bytes
"s", "/s"	per second

Examples:

"56kbps" = 56,000 bits/s
"128 kb/s" = 128,000 bits/s
"8Kib/s" = 1 KiB/s = 8192 bits/s
"1kB/s" = 8000 bits/s

See also: DataRate Attribute

Definition at line 88 of file data-rate.h.

Constructor & Destructor Documentation

ns3::DataRate::DataRate ( )

Definition at line 187 of file data-rate.cc.

References NS_LOG_FUNCTION.

ns3::DataRate::DataRate ( uint64_t bps )

Integer constructor.

Construct a data rate from an integer. This class only supports positive integer data rates in units of bits/s, meaning 1bit/s is the smallest non-trivial bitrate available.

Parameters

bps	bit/s value

Definition at line 193 of file data-rate.cc.

References NS_LOG_FUNCTION.

ns3::DataRate::DataRate ( std::string rate )

String constructor.

Construct a data rate from a string. Many different unit strings are supported Supported unit strings: bps, b/s, Bps, B/s
kbps, kb/s, Kbps, Kb/s, kBps, kB/s, KBps, KB/s, Kib/s, KiB/s
Mbps, Mb/s, MBps, MB/s, Mib/s, MiB/s
Gbps, Gb/s, GBps, GB/s, Gib/s, GiB/s
Examples: "56kbps" = 56,000 bits/s
"128 kb/s" = 128,000 bits/s
"8Kib/s" = 1 KiB/s = 8192 bits/s
"1kB/s" = 8000 bits/s

Parameters

rate	string representing the desired rate

Definition at line 255 of file data-rate.cc.

References DoParse(), m_bps, NS_FATAL_ERROR, and NS_LOG_FUNCTION.

Here is the call graph for this function:

Member Function Documentation

Time ns3::DataRate::CalculateBitsTxTime ( uint32_t bits ) const

Calculate transmission time.

Calculates the transmission time at this data rate

Parameters

bits	The number of bits (not bytes) for which to calculate

Returns: The transmission time for the number of bits specified

Definition at line 242 of file data-rate.cc.

References m_bps, NS_LOG_FUNCTION, and ns3::Seconds().

Here is the call graph for this function:

Time ns3::DataRate::CalculateBytesTxTime ( uint32_t bytes ) const

Calculate transmission time.

Calculates the transmission time at this data rate

Parameters

bytes The number of bytes (not bits) for which to calculate

Returns: The transmission time for the number of bytes specified

Definition at line 235 of file data-rate.cc.

References m_bps, NS_LOG_FUNCTION, and ns3::Seconds().

Referenced by ns3::CsmaNetDevice::Attach(), ns3::TbfQueueDisc::DoDequeue(), ns3::TcpSocketBase::SendDataPacket(), ns3::SimpleNetDevice::SendFrom(), ns3::TcpSocketBase::SendPendingData(), ns3::HalfDuplexIdealPhy::StartTx(), ns3::SimpleNetDevice::TransmitComplete(), ns3::PointToPointNetDevice::TransmitStart(), and ns3::CsmaNetDevice::TransmitStart().

Here is the call graph for this function:

Here is the caller graph for this function:

double ns3::DataRate::CalculateTxTime ( uint32_t bytes ) const

Calculate transmission time.

Calculates the transmission time at this data rate

Parameters

bytes The number of bytes (not bits) for which to calculate

Returns: The transmission time in seconds for the number of bytes specified

Deprecated:: This method will go away in future versions of ns-3. See instead CalculateBytesTxTime()

Definition at line 229 of file data-rate.cc.

References m_bps, and NS_LOG_FUNCTION.

bool ns3::DataRate::DoParse	(	const std::string	s,
		uint64_t *	v
	)

staticprivate

Parse a string representing a DataRate into an uint64_t.

Allowed unit representations include all combinations of

An SI prefix: k, K, M, G
Decimal or kibibit (as in "Kibps", meaning 1024 bps)
Bits or bytes (8 bits)
"bps" or "/s"

Parameters

[in]	s	The string representation, including unit
[in,out]	v	The location to put the value, in bits/sec.

Returns: true if parsing was successful.

Definition at line 34 of file data-rate.cc.

References NS_LOG_FUNCTION.

Referenced by DataRate(), and ns3::operator>>().

Here is the caller graph for this function:

uint64_t ns3::DataRate::GetBitRate ( ) const

Get the underlying bitrate.

Returns: The underlying bitrate in bits per second

Definition at line 249 of file data-rate.cc.

References m_bps, and NS_LOG_FUNCTION.

Referenced by ns3::OnOffApplication::CancelEvents(), ns3::TbfQueueDisc::DoDequeue(), ns3::RedQueueDisc::InitializeParams(), ns3::operator*(), ns3::operator<<(), ns3::OnOffApplication::ScheduleNextTx(), MyApp::ScheduleTx(), SimpleSource::ScheduleTx(), and Ipv4DynamicGlobalRoutingTestCase::SendData().

Here is the caller graph for this function:

bool ns3::DataRate::operator!= ( const DataRate & rhs ) const

Returns: true if this rate is not equal to rhs

Parameters

rhs	the datarate to compare to this datarate

Definition at line 224 of file data-rate.cc.

References m_bps.

bool ns3::DataRate::operator< ( const DataRate & rhs ) const

Returns: true if this rate is less than rhs

Parameters

rhs	the datarate to compare to this datarate

Definition at line 199 of file data-rate.cc.

References m_bps.

bool ns3::DataRate::operator<= ( const DataRate & rhs ) const

Returns: true if this rate is less than or equal to rhs

Parameters

rhs	the datarate to compare to this datarate

Definition at line 204 of file data-rate.cc.

References m_bps.

bool ns3::DataRate::operator== ( const DataRate & rhs ) const

Returns: true if this rate is equal to rhs

Parameters

rhs	the datarate to compare to this datarate

Definition at line 219 of file data-rate.cc.

References m_bps.

bool ns3::DataRate::operator> ( const DataRate & rhs ) const

Returns: true if this rate is greater than rhs

Parameters

rhs	the datarate to compare to this datarate

Definition at line 209 of file data-rate.cc.

References m_bps.

bool ns3::DataRate::operator>= ( const DataRate & rhs ) const

Returns: true if this rate is greather than or equal to rhs

Parameters

rhs	the datarate to compare to this datarate

Definition at line 214 of file data-rate.cc.

References m_bps.

Friends And Related Function Documentation

std::istream& operator>>	(	std::istream &	is,
		DataRate &	rate
	)

friend

Stream extraction operator.

Parameters

is	the stream
rate	the data rate

Returns: a reference to the stream

Definition at line 272 of file data-rate.cc.

Member Data Documentation

uint64_t ns3::DataRate::m_bps

private

data rate [bps]

Definition at line 221 of file data-rate.h.

Referenced by CalculateBitsTxTime(), CalculateBytesTxTime(), CalculateTxTime(), DataRate(), GetBitRate(), operator!=(), operator<(), operator<=(), operator==(), operator>(), and operator>=().

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

src/network/utils/data-rate.h
src/network/utils/data-rate.cc

Public Member Functions

Static Private Member Functions

Private Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation