F5/unison
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

wifi: Extend EMLSR unit test to check backoff expiration alerts

Browse Source
This commit is contained in:
Stefano Avallone
2024-04-20 16:16:03 +02:00
parent 27a2d63c3a
commit c26641d62d
2 changed files with 44 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
src/wifi/test/wifi-emlsr-test.cc
View File

@@ -2374,7 +2374,9 @@ EmlsrDlTxopTest::DoRun()
}
EmlsrUlTxopTest::EmlsrUlTxopTest(const Params& params)
: EmlsrOperationsTestBase("Check EML UL TXOP transmissions"),
: EmlsrOperationsTestBase("Check EML UL TXOP transmissions (genBackoffAndUseAuxPhyCca=" +
std::to_string(params.genBackoffAndUseAuxPhyCca) +
", nSlotsLeftAlert=" + std::to_string(params.nSlotsLeftAlert)),
m_emlsrLinks(params.linksToEnableEmlsrOn),
m_channelWidth(params.channelWidth),
m_auxPhyChannelWidth(params.auxPhyChannelWidth),
@@ -2388,7 +2390,8 @@ EmlsrUlTxopTest::EmlsrUlTxopTest(const Params& params)
m_countBlockAck(0),
m_countRtsframes(0),
m_genBackoffIfTxopWithoutTx(params.genBackoffAndUseAuxPhyCca),
m_useAuxPhyCca(params.genBackoffAndUseAuxPhyCca)
m_useAuxPhyCca(params.genBackoffAndUseAuxPhyCca),
m_nSlotsLeftAlert(params.nSlotsLeftAlert)
{
m_nEmlsrStations = 1;
m_nNonEmlsrStations = 0;
@@ -2427,6 +2430,7 @@ EmlsrUlTxopTest::DoSetup()
Config::SetDefault("ns3::EhtConfiguration::MsdMaxNTxops", UintegerValue(m_msdMaxNTxops));
Config::SetDefault("ns3::ChannelAccessManager::GenerateBackoffIfTxopWithoutTx",
BooleanValue(m_genBackoffIfTxopWithoutTx));
Config::SetDefault("ns3::ChannelAccessManager::NSlotsLeft", UintegerValue(m_nSlotsLeftAlert));
// Channel switch delay should be less than RTS TX time + SIFS + CTS TX time, otherwise
// UL TXOPs cannot be initiated by aux PHYs
Config::SetDefault("ns3::WifiPhy::ChannelSwitchDelay", TimeValue(MicroSeconds(75)));
@@ -2944,27 +2948,33 @@ EmlsrUlTxopTest::CheckBlockAck(const WifiConstPsduMap& psduMap,
// find the min remaining backoff time on non-primary links for AC BE
auto minBackoff = Time::Max();
Time slot{0};
for (uint8_t id = 0; id < m_staMacs[0]->GetNLinks(); id++)
{
// update backoff
m_staMacs[0]->GetChannelAccessManager(id)->NeedBackoffUponAccess(acBe,
true,
true);
if (!m_staMacs[0]->GetWifiPhy(id))
{
continue; // no PHY on this link
}
if (auto backoff =
m_staMacs[0]->GetChannelAccessManager(id)->GetBackoffEndFor(acBe);
id != m_mainPhyId && m_staMacs[0]->IsEmlsrLink(id) && backoff < minBackoff)
{
minBackoff = backoff;
slot = m_staMacs[0]->GetWifiPhy(id)->GetSlot();
}
}
// if the backoff on a link has expired before the end of the main PHY channel
// switch, the main PHY will be requested to switch again at the first slot
// boundary after the end of the channel switch. Otherwise, it will be requested
// to switch when the backoff expires.
auto expected2ndSwitchDelay = (minBackoff <= Simulator::Now())
? mainPhy->GetSlot()
: (minBackoff - Simulator::Now());
// switch, the main PHY will be requested to switch again no later than the first
// slot boundary after the end of the channel switch. Otherwise, it will be
// requested to switch when the backoff expires or when the backoff counter reaches
// the configured number of slots
auto expected2ndSwitchDelay =
(minBackoff <= Simulator::Now()) ? mainPhy->GetSlot()
: m_nSlotsLeftAlert > 0
? Max(minBackoff - m_nSlotsLeftAlert * slot - Simulator::Now(), Time{0})
: (minBackoff - Simulator::Now());
// check that the main PHY is requested to switch to a non-primary link after
// the expected delay
@@ -3467,9 +3477,10 @@ EmlsrUlTxopTest::CheckResults()
NS_TEST_EXPECT_MSG_NE(+psduIt->linkId,
+m_mainPhyId,
"Fifth QoS data frame should be transmitted on a non-primary link");
NS_TEST_EXPECT_MSG_EQ(psduIt->txVector.GetChannelWidth(),
(m_useAuxPhyCca ? m_auxPhyChannelWidth : m_channelWidth),
"Fifth data frame not transmitted on the correct channel width");
NS_TEST_EXPECT_MSG_EQ(
psduIt->txVector.GetChannelWidth(),
(m_useAuxPhyCca && m_nSlotsLeftAlert == 0 ? m_auxPhyChannelWidth : m_channelWidth),
"Fifth data frame not transmitted on the correct channel width");
// Do not check the start transmission time if a backoff is generated even when no
// transmission is done (if the backoff expires while the main PHY is switching, a new
// backoff is generated and, before this backoff expires, the main PHY may be requested
@@ -4307,12 +4318,21 @@ WifiEmlsrTestSuite::WifiEmlsrTestSuite()
for (auto genBackoffAndUseAuxPhyCca : {true, false})
{
AddTestCase(new EmlsrUlTxopTest(
{{0, 1, 2}, 40, 20, MicroSeconds(5504), 3, genBackoffAndUseAuxPhyCca}),
TestCase::Duration::QUICK);
AddTestCase(
new EmlsrUlTxopTest({{0, 1}, 40, 20, MicroSeconds(5504), 1, genBackoffAndUseAuxPhyCca}),
TestCase::Duration::QUICK);
for (auto nSlotsLeft : std::initializer_list<uint8_t>{0, 4})
{
AddTestCase(new EmlsrUlTxopTest({{0, 1, 2},
40,
20,
MicroSeconds(5504),
3,
genBackoffAndUseAuxPhyCca,
nSlotsLeft}),
TestCase::Duration::QUICK);
AddTestCase(
new EmlsrUlTxopTest(
{{0, 1}, 40, 20, MicroSeconds(5504), 1, genBackoffAndUseAuxPhyCca, nSlotsLeft}),
TestCase::Duration::QUICK);
}
}
for (bool switchAuxPhy : {true, false})

3
src/wifi/test/wifi-emlsr-test.h
View File

@@ -543,6 +543,8 @@ class EmlsrUlTxopTest : public EmlsrOperationsTestBase
//!< but it does not transmit any frame, the second value
//!< controls whether CCA info from aux PHY is used when
//!< aux PHY is not TX capable
uint8_t nSlotsLeftAlert; //!< value to set the ChannelAccessManager NSlotsLeft
//!< attribute to
};
/**
@@ -659,6 +661,7 @@ class EmlsrUlTxopTest : public EmlsrOperationsTestBase
//!< transmit any frame
bool m_useAuxPhyCca; //!< whether CCA info from aux PHY is used when
//!< aux PHY is not TX capable
uint8_t m_nSlotsLeftAlert; //!< value for ChannelAccessManager NSlotsLeft attribute
std::optional<bool> m_corruptCts; //!< whether the transmitted CTS must be corrupted
Time m_5thQosFrameTxTime; //!< start transmission time of the 5th QoS data frame
};