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Lines 264-270
IdealWifiManager::DoGetDataTxVector (WifiRemoteStation *st)
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| 264 |
std::vector<WifiTxVector> candidateTxVectors; |
264 |
std::vector<WifiTxVector> candidateTxVectors; |
| 265 |
WifiTxVector txVector; |
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WifiTxVector txVector; |
| 266 |
WifiMode mode; |
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WifiMode mode; |
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uint8_t nss = 1; |
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uint8_t selectedNss = 1; |
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txVector.SetChannelWidth (GetPhy ()->GetChannelWidth ()); |
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txVector.SetChannelWidth (GetPhy ()->GetChannelWidth ()); |
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txVector.SetGuardInterval (GetPhy ()->GetShortGuardInterval () ? 400 : 800); |
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txVector.SetGuardInterval (GetPhy ()->GetShortGuardInterval () ? 400 : 800); |
| 270 |
if (station->m_lastSnrObserved == station->m_lastSnrCached) |
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if (station->m_lastSnrObserved == station->m_lastSnrCached) |
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Lines 272-285
IdealWifiManager::DoGetDataTxVector (WifiRemoteStation *st)
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| 272 |
// SNR has not changed, so skip the search and use the last |
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// SNR has not changed, so skip the search and use the last |
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// mode selected |
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// mode selected |
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maxMode = station->m_lastMode; |
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maxMode = station->m_lastMode; |
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nss = station->m_nss; |
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selectedNss = station->m_nss; |
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NS_LOG_DEBUG ("Using cached mode = " << maxMode.GetUniqueName () << |
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NS_LOG_DEBUG ("Using cached mode = " << maxMode.GetUniqueName () << |
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" last snr observed " << station->m_lastSnrObserved << |
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" last snr observed " << station->m_lastSnrObserved << |
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" cached " << station->m_lastSnrCached); |
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" cached " << station->m_lastSnrCached); |
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} |
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} |
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else |
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else |
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{ |
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{ |
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if (HasVhtSupported () == true || HasHtSupported () == true) |
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if ((HasVhtSupported () == true || HasHtSupported () == true) && |
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(GetHtSupported (station) == true || GetVhtSupported (station) == true)) |
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{ |
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{ |
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for (uint32_t i = 0; i < GetNMcsSupported (station); i++) |
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for (uint32_t i = 0; i < GetNMcsSupported (station); i++) |
| 285 |
{ |
286 |
{ |
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Lines 287-343
IdealWifiManager::DoGetDataTxVector (WifiRemoteStation *st)
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| 287 |
txVector.SetMode (mode); |
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txVector.SetMode (mode); |
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if (mode.GetModulationClass () == WIFI_MOD_CLASS_HT) |
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if (mode.GetModulationClass () == WIFI_MOD_CLASS_HT) |
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{ |
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{ |
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//derive NSS from the Mcs index |
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// If the node and peer are both VHT capable, only search VHT modes |
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nss = (mode.GetMcsValue () / 8) + 1; |
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if (HasVhtSupported () && GetVhtSupported (station)) |
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} |
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{ |
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continue; |
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} |
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// Derive NSS from the MCS index. There is a different mode for each possible NSS value. |
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uint8_t nss = (mode.GetMcsValue () / 8) + 1; |
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txVector.SetNss (nss); |
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if (WifiPhy::IsValidTxVector (txVector) == false) |
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{ |
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NS_LOG_DEBUG ("Skipping mode " << mode.GetUniqueName () << |
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" nss " << nss << " width " << |
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(uint16_t) txVector.GetChannelWidth ()); |
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continue; |
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} |
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double threshold = GetSnrThreshold (txVector); |
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NS_LOG_DEBUG ("Testing mode = " << mode.GetUniqueName () << |
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" threshold " << threshold << " maxThreshold " << |
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maxThreshold << " last snr observed " << |
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station->m_lastSnrObserved << " cached " << |
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station->m_lastSnrCached); |
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if (threshold > maxThreshold && threshold < station->m_lastSnrObserved) |
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{ |
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NS_LOG_DEBUG ("Candidate mode = " << mode.GetUniqueName () << |
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" threshold " << threshold << |
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" last snr observed " << |
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station->m_lastSnrObserved); |
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maxThreshold = threshold; |
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maxMode = mode; |
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selectedNss = nss; |
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} |
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} |
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else |
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else |
| 294 |
{ |
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{ |
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nss = GetPhy ()->GetMaxSupportedTxSpatialStreams (); |
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// If the node and peer are not both VHT capable, only search HT modes |
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} |
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if (!HasVhtSupported () || !GetVhtSupported (station)) |
| 297 |
txVector.SetNss (nss); |
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{ |
| 298 |
if (WifiPhy::IsValidTxVector (txVector) == false) |
328 |
continue; |
| 299 |
{ |
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} |
| 300 |
NS_LOG_DEBUG ("Skipping mode " << mode.GetUniqueName () << |
330 |
uint8_t maxNss = GetPhy ()->GetMaxSupportedTxSpatialStreams (); |
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" nss " << nss << " width " << |
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for (uint8_t nss = 0; nss <= maxNss; nss++) |
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(uint16_t) txVector.GetChannelWidth ()); |
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{ |
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continue; |
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// If the peer does not support more streams, stop searching. |
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} |
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if (GetNumberOfSupportedStreams (station) < nss) |
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double threshold = GetSnrThreshold (txVector); |
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{ |
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// If the node and peer are both VHT capable, only search VHT modes |
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break; |
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if (mode.GetModulationClass () == WIFI_MOD_CLASS_HT && HasVhtSupported () && GetVhtSupported (st)) |
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} |
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{ |
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txVector.SetNss (nss); |
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continue; |
339 |
if (WifiPhy::IsValidTxVector (txVector) == false) |
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} |
340 |
{ |
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// If the node and peer are not both VHT capable, only search HT modes |
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NS_LOG_DEBUG ("Skipping mode " << mode.GetUniqueName () << |
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if (mode.GetModulationClass () == WIFI_MOD_CLASS_VHT && (!HasVhtSupported () || !GetVhtSupported (st))) |
342 |
" nss " << nss << " width " << |
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{ |
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(uint16_t) txVector.GetChannelWidth ()); |
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continue; |
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continue; |
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} |
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} |
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NS_LOG_DEBUG ("Testing mode = " << mode.GetUniqueName () << |
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double threshold = GetSnrThreshold (txVector); |
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" threshold " << threshold << " maxThreshold " << |
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NS_LOG_DEBUG ("Testing mode = " << mode.GetUniqueName () << |
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maxThreshold << " last snr observed " << |
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" threshold " << threshold << " maxThreshold " << |
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station->m_lastSnrObserved << " cached " << |
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maxThreshold << " last snr observed " << |
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station->m_lastSnrCached); |
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station->m_lastSnrObserved << " cached " << |
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if (threshold > maxThreshold && threshold < station->m_lastSnrObserved) |
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station->m_lastSnrCached); |
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{ |
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if (threshold > maxThreshold && threshold < station->m_lastSnrObserved) |
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NS_LOG_DEBUG ("Candidate mode = " << mode.GetUniqueName () << |
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{ |
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" threshold " << threshold << |
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NS_LOG_DEBUG ("Candidate mode = " << mode.GetUniqueName () << |
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" last snr observed " << |
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" threshold " << threshold << |
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station->m_lastSnrObserved); |
356 |
" last snr observed " << |
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maxThreshold = threshold; |
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station->m_lastSnrObserved); |
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maxMode = mode; |
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maxThreshold = threshold; |
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359 |
maxMode = mode; |
| 360 |
selectedNss = nss; |
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} |
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} |
| 329 |
} |
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} |
| 330 |
} |
364 |
} |
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} |
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} |
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else |
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else |
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{ |
367 |
{ |
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// Non-HT selection |
368 |
// Non-HT selection |
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nss = 1; |
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selectedNss = 1; |
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for (uint32_t i = 0; i < GetNSupported (station); i++) |
370 |
for (uint32_t i = 0; i < GetNSupported (station); i++) |
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{ |
371 |
{ |
| 338 |
mode = GetSupported (station, i); |
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mode = GetSupported (station, i); |
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txVector.SetMode (mode); |
373 |
txVector.SetMode (mode); |
| 340 |
txVector.SetNss (nss); |
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txVector.SetNss (selectedNss); |
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txVector.SetChannelWidth (GetChannelWidthForMode (mode)); |
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txVector.SetChannelWidth (GetChannelWidthForMode (mode)); |
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double threshold = GetSnrThreshold (txVector); |
376 |
double threshold = GetSnrThreshold (txVector); |
| 343 |
NS_LOG_DEBUG ("mode = " << mode.GetUniqueName () << |
377 |
NS_LOG_DEBUG ("mode = " << mode.GetUniqueName () << |
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Lines 358-373
IdealWifiManager::DoGetDataTxVector (WifiRemoteStation *st)
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| 358 |
NS_LOG_DEBUG ("Updating cached values for station to " << maxMode.GetUniqueName () << " snr " << station->m_lastSnrObserved); |
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NS_LOG_DEBUG ("Updating cached values for station to " << maxMode.GetUniqueName () << " snr " << station->m_lastSnrObserved); |
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station->m_lastSnrCached = station->m_lastSnrObserved; |
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station->m_lastSnrCached = station->m_lastSnrObserved; |
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station->m_lastMode = maxMode; |
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station->m_lastMode = maxMode; |
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station->m_nss = nss; |
395 |
station->m_nss = selectedNss; |
| 362 |
} |
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} |
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uint8_t channelWidth = GetChannelWidth (station); |
397 |
uint8_t channelWidth = GetChannelWidth (station); |
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NS_LOG_DEBUG ("Found maxMode: " << maxMode << " channelWidth: " << (uint16_t) channelWidth); |
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NS_LOG_DEBUG ("Found maxMode: " << maxMode << " channelWidth: " << (uint16_t) channelWidth); |
| 365 |
if (m_currentRate != maxMode.GetDataRate (channelWidth, GetPhy ()->GetShortGuardInterval () ? 400 : 800, nss)) |
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if (m_currentRate != maxMode.GetDataRate (channelWidth, GetPhy ()->GetShortGuardInterval () ? 400 : 800, selectedNss)) |
| 366 |
{ |
400 |
{ |
| 367 |
NS_LOG_DEBUG ("New datarate: " << maxMode.GetDataRate (channelWidth, GetPhy ()->GetShortGuardInterval () ? 400 : 800, nss)); |
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NS_LOG_DEBUG ("New datarate: " << maxMode.GetDataRate (channelWidth, GetPhy ()->GetShortGuardInterval () ? 400 : 800, selectedNss)); |
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m_currentRate = maxMode.GetDataRate (channelWidth, GetPhy ()->GetShortGuardInterval () ? 400 : 800, nss); |
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m_currentRate = maxMode.GetDataRate (channelWidth, GetPhy ()->GetShortGuardInterval () ? 400 : 800, selectedNss); |
| 369 |
} |
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} |
| 370 |
return WifiTxVector (maxMode, GetDefaultTxPowerLevel (), GetLongRetryCount (station), GetPreambleForTransmission (maxMode, GetAddress (station)), 800, GetNumberOfAntennas (), nss, 0, channelWidth, GetAggregation (station), false); |
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return WifiTxVector (maxMode, GetDefaultTxPowerLevel (), GetLongRetryCount (station), GetPreambleForTransmission (maxMode, GetAddress (station)), 800, GetNumberOfAntennas (), selectedNss, 0, channelWidth, GetAggregation (station), false); |
| 371 |
} |
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} |
| 372 |
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| 373 |
WifiTxVector |
407 |
WifiTxVector |