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wifi: Drop ICF received on a link blocked because another EMLSR link is being used

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Fixes issues when AP MLD and EMLSR client concurrently send frames to each other.
This commit is contained in:
Stefano Avallone
2023-06-05 15:54:15 +02:00
committed by Stefano Avallone
parent 16e0836234
commit b98a80b581
1 changed files with 17 additions and 0 deletions
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17
src/wifi/model/eht/eht-frame-exchange-manager.cc
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@@ -621,6 +621,23 @@ EhtFrameExchangeManager::ReceiveMpdu(Ptr<const WifiMpdu> mpdu,
if (trigger.IsMuRts() && m_staMac->IsEmlsrLink(m_linkId))
{
// this is an initial Control frame
auto apAddress = GetWifiRemoteStationManager()->GetMldAddress(m_bssid);
NS_ASSERT_MSG(apAddress, "MLD address not found for BSSID " << m_bssid);
// when EMLSR links are blocked, all TIDs are blocked (we test TID 0 here)
WifiContainerQueueId queueId(WIFI_QOSDATA_QUEUE, WIFI_UNICAST, *apAddress, 0);
if (auto mask =
m_staMac->GetMacQueueScheduler()->GetQueueLinkMask(AC_BE, queueId, m_linkId);
mask && mask->test(static_cast<std::size_t>(
WifiQueueBlockedReason::USING_OTHER_EMLSR_LINK)))
{
// we received an ICF on a link that is blocked because another EMLSR link is
// being used. This is likely because transmission on the other EMLSR link
// started before the reception of the ICF ended. We drop this ICF and let the
// UL TXOP continue.
NS_LOG_DEBUG("Drop ICF because another EMLSR link is being used");
return;
}
NS_ASSERT(m_staMac->GetEmlsrManager());
Simulator::ScheduleNow(&EmlsrManager::NotifyIcfReceived,
m_staMac->GetEmlsrManager(),