Inheritance diagram for ns3::Bug555TestCase:

Public Member Functions
virtual void	DoRun (void)
	Implementation to actually run this test case. More...

Private Member Functions
void	NotifyPhyTxBegin (Ptr< const Packet > p)

void	SendOnePacket (Ptr< WifiNetDevice > dev)

Private Attributes
Time	m_firstTransmissionTime

ObjectFactory	m_mac

ObjectFactory	m_manager

unsigned int	m_numSentPackets

ObjectFactory	m_propDelay

Time	m_secondTransmissionTime

Additional Inherited Members
Public Types inherited from ns3::TestCase
enum	TestDuration { QUICK = 1, EXTENSIVE = 2, TAKES_FOREVER = 3 }
	How long the test takes to execute. More...

Protected Member Functions inherited from ns3::TestCase
	TestCase (std::string name)

void	AddTestCase (TestCase *testCase) NS_DEPRECATED
	Add an individual test case to this test suite. More...

void	AddTestCase (TestCase *testCase, enum TestDuration duration)
	Add an individual test case to this test suite. More...

std::string	CreateDataDirFilename (std::string filename)

std::string	CreateTempDirFilename (std::string filename)

bool	GetErrorStatus (void) const NS_DEPRECATED

std::string	GetName (void) const

bool	IsStatusFailure (void) const

bool	IsStatusSuccess (void) const

bool	MustAssertOnFailure (void) const

bool	MustContinueOnFailure (void) const

void	ReportTestFailure (std::string cond, std::string actual, std::string limit, std::string message, std::string file, int32_t line)

void	SetDataDir (std::string directory)

Detailed Description

Make sure that when multiple broadcast packets are queued on the same device in a short succession no virtual collision occurs

The observed behavior is that the first frame will be sent immediately, and the frames are spaced by (backoff + SIFS + AIFS) time intervals (where backoff is a random number of slot sizes up to maximum CW)

The following test case should not generate virtual collision for the second frame. The seed and run numbers were pick such that the second frame gets backoff = 0.

                 frame 1, frame 2
                 arrive                SIFS + AIFS
                 V                    <----------->

time |-----------—|----------------—|----------—|--------—> 0 1s 1.001408s 1.001442s ^ ^ ^ start TX finish TX start TX frame 1 frame 1 frame 2 ^ frame 2 backoff = 0

The buggy behavior was that frame 2 experiences a virtual collision and re-selects the backoff again. As a result, the actual backoff experience by frame 2 is less likely to be 0 since that would require two successions of 0 backoff (one that generates the virtual collision and one after the virtual collision).

Definition at line 317 of file wifi-test.cc.

Member Function Documentation

void ns3::Bug555TestCase::DoRun ( void )

virtual

Implementation to actually run this test case.

Subclasses should override this method to conduct their tests.

Implements ns3::TestCase.

Definition at line 368 of file wifi-test.cc.

References ns3::Node::AddDevice(), ns3::Object::AggregateObject(), ns3::Mac48Address::Allocate(), ns3::WifiMac::ConfigureStandard(), ns3::ObjectFactory::Create(), ns3::Simulator::Destroy(), ns3::MakeCallback(), ns3::MicroSeconds(), ns3::Simulator::Run(), ns3::Simulator::Schedule(), ns3::Seconds(), ns3::RngSeedManager::SetRun(), ns3::RngSeedManager::SetSeed(), ns3::ObjectFactory::SetTypeId(), ns3::Simulator::Stop(), and ns3::WIFI_PHY_STANDARD_80211a.

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

src/wifi/test/wifi-test.cc

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation