38 #include "ns3/packet.h" 39 #include "ns3/simulator.h" 41 #include "ns3/random-variable-stream.h" 43 #include "ns3/wifi-mac.h" 44 #include "ns3/wifi-phy.h" 46 #define Min(a,b) ((a < b) ? a : b) 47 #define Max(a,b) ((a > b) ? a : b) 78 static TypeId tid =
TypeId (
"ns3::MinstrelHtWifiManager")
80 .AddConstructor<MinstrelHtWifiManager> ()
81 .SetGroupName (
"Wifi")
82 .AddAttribute (
"UpdateStatistics",
83 "The interval between updating statistics table ",
87 .AddAttribute (
"LegacyUpdateStatistics",
88 "The interval between updating statistics table (for legacy Minstrel) ",
92 .AddAttribute (
"LookAroundRate",
93 "The percentage to try other rates (for legacy Minstrel)",
96 MakeUintegerChecker<uint8_t>(0, 100))
97 .AddAttribute (
"EWMA",
101 MakeUintegerChecker<uint8_t>(0, 100))
102 .AddAttribute (
"SampleColumn",
103 "The number of columns used for sampling",
106 MakeUintegerChecker <uint8_t> ())
107 .AddAttribute (
"PacketLength",
108 "The packet length used for calculating mode TxTime (bytes)",
111 MakeUintegerChecker <uint32_t> ())
112 .AddAttribute (
"UseVhtOnly",
113 "Use only VHT MCSs (and not HT) when VHT is available",
117 .AddAttribute (
"PrintStats",
118 "Control the printing of the statistics table",
122 .AddTraceSource (
"Rate",
123 "Traced value for rate changes (b/s)",
125 "ns3::TracedValueCallback::Uint64")
158 int64_t numStreamsAssigned = 0;
160 numStreamsAssigned++;
162 return numStreamsAssigned;
188 NS_FATAL_ERROR (
"WifiRemoteStationManager selected does not support HE rates");
222 for (uint16_t chWidth = 20; chWidth <=
MAX_HT_WIDTH; chWidth *= 2)
224 for (uint8_t sgi = 0; sgi <= 1; sgi++)
248 WifiMode mode = htMcsList[deviceIndex];
252 NS_LOG_DEBUG (
"Initialized group " << +groupId <<
": (" << +streams <<
"," << +sgi <<
"," << chWidth <<
")");
261 for (uint16_t chWidth = 20; chWidth <=
MAX_VHT_WIDTH; chWidth *= 2)
263 for (uint8_t sgi = 0; sgi <= 1; sgi++)
294 NS_LOG_DEBUG (
"Initialized group " << +groupId <<
": (" << +streams <<
"," << +sgi <<
"," << chWidth <<
")");
308 txvector.
SetNss (streams);
320 txvector.
SetNss (streams);
344 m_minstrelGroups[groupId].ratesFirstMpduTxTimeTable.insert (std::make_pair (mode, t));
360 m_minstrelGroups[groupId].ratesTxTimeTable.insert (std::make_pair (mode, t));
462 NS_LOG_DEBUG (
"DoReportRxOk m_txrate=" << static_cast<MinstrelHtWifiRemoteStation*> (st)->m_txrate);
521 station->
m_groupsTable[groupId].m_ratesTable[rateId].numRateAttempt++;
528 double dataSnr, uint16_t dataChannelWidth, uint8_t dataNss)
530 NS_LOG_FUNCTION (
this << st << ackSnr << ackMode << dataSnr << dataChannelWidth << +dataNss);
562 station->
m_groupsTable[groupId].m_ratesTable[rateId].numRateSuccess++;
563 station->
m_groupsTable[groupId].m_ratesTable[rateId].numRateAttempt++;
636 double rxSnr,
double dataSnr, uint16_t dataChannelWidth, uint8_t dataNss)
638 NS_LOG_FUNCTION (
this << st << nSuccessfulMpdus << nFailedMpdus << rxSnr << dataSnr << dataChannelWidth << +dataNss);
650 nSuccessfulMpdus <<
" FailedMpdus=" << nFailedMpdus);
653 station->
m_ampduLen += nSuccessfulMpdus + nFailedMpdus;
659 station->
m_groupsTable[groupId].m_ratesTable[rateId].numRateSuccess += nSuccessfulMpdus;
660 station->
m_groupsTable[groupId].m_ratesTable[rateId].numRateAttempt += nSuccessfulMpdus + nFailedMpdus;
741 station->
m_groupsTable[maxTp2GroupId].m_ratesTable[maxTp2RateId].retryCount))
749 station->
m_groupsTable[maxTp2GroupId].m_ratesTable[maxTp2RateId].retryCount +
750 station->
m_groupsTable[maxProbGroupId].m_ratesTable[maxProbRateId].retryCount))
774 station->
m_groupsTable[maxProbGroupId].m_ratesTable[maxProbRateId].retryCount)
847 uint8_t mcsIndex = station->
m_groupsTable[groupId].m_ratesTable[rateId].mcsIndex;
849 NS_LOG_DEBUG (
"DoGetDataMode rateId= " << +rateId <<
" groupId= " << +groupId <<
" mode= " <<
GetMcsSupported (station, mcsIndex));
857 "," << +group.
sgi <<
"," << group.
chWidth <<
")" <<
868 return WifiTxVector (mode,
GetDefaultTxPowerLevel (),
GetPreambleForTransmission (mode.
GetModulationClass (),
GetShortPreambleEnabled ()), group.
sgi ? 400 : 800,
GetNumberOfAntennas (), group.
streams,
GetNess (station),
GetChannelWidthForTransmission (mode, group.
chWidth),
GetAggregation (station) && !station->
m_isSampling);
907 uint8_t mcsIndex = station->
m_groupsTable[groupId].m_ratesTable[rateId].mcsIndex;
914 bool rateFound =
false;
916 for (uint8_t i = 0; i < nBasicRates; i++)
919 if (rate <= lastDataRate)
929 for (
const auto & mode :
phy->GetModeList ())
931 uint64_t rate = mode.GetDataRate (20);
932 if (rate <= lastDataRate)
973 NS_LOG_DEBUG (
"No re-transmission allowed. Retries: " << station->
m_longRetry <<
" Max retries: " << maxRetries);
995 return station->
m_groupsTable[maxTpGroupId].m_ratesTable[maxTpRateId].retryCount +
996 station->
m_groupsTable[maxTp2GroupId].m_ratesTable[maxTp2RateId].retryCount +
997 station->
m_groupsTable[maxProbGroupId].m_ratesTable[maxProbRateId].retryCount;
1001 return 1 + station->
m_groupsTable[maxTpGroupId].m_ratesTable[maxTp2RateId].retryCount +
1002 station->
m_groupsTable[maxProbGroupId].m_ratesTable[maxProbRateId].retryCount;
1011 uint8_t index = station->
m_groupsTable[sampleGroup].m_index;
1014 uint16_t rateIndex =
GetIndex (sampleGroup, sampleIndex);
1072 uint8_t sampleGroupId =
GetGroupId (sampleIdx);
1073 uint8_t sampleRateId =
GetRateId (sampleIdx);
1076 if (station->
m_groupsTable[sampleGroupId].m_supported && station->
m_groupsTable[sampleGroupId].m_ratesTable[sampleRateId].supported)
1088 " SampleRate= " << sampleIdx <<
" SampleProb= " << sampleRateInfo.
ewmaProb);
1109 Time maxTp2Duration = station->
m_groupsTable[maxTp2GroupId].m_ratesTable[maxTp2RateId].perfectTxTime;
1110 Time maxProbDuration = station->
m_groupsTable[maxProbGroupId].m_ratesTable[maxProbRateId].perfectTxTime;
1112 NS_LOG_DEBUG (
"Use sample rate? SampleDuration= " << sampleDuration <<
" maxTp2Duration= " << maxTp2Duration <<
1113 " maxProbDuration= " << maxProbDuration <<
" sampleStreams= " << +sampleStreams <<
1114 " maxTpStreams= " << +maxTpStreams);
1115 if (sampleDuration < maxTp2Duration || (sampleStreams < maxTpStreams && sampleDuration < maxProbDuration))
1123 NS_LOG_DEBUG (
"FindRate " <<
"sampleRate=" << sampleIdx);
1138 NS_LOG_DEBUG (
"FindRate " <<
"sampleRate=" << sampleIdx);
1197 station->
m_groupsTable[j].m_ratesTable[i].retryUpdated =
false;
1200 "\t attempt=" << station->
m_groupsTable[j].m_ratesTable[i].numRateAttempt <<
1201 "\t success=" << station->
m_groupsTable[j].m_ratesTable[i].numRateSuccess);
1204 if (station->
m_groupsTable[j].m_ratesTable[i].numRateAttempt > 0)
1206 station->
m_groupsTable[j].m_ratesTable[i].numSamplesSkipped = 0;
1211 tempProb = (100 * station->
m_groupsTable[j].m_ratesTable[i].numRateSuccess) / station->
m_groupsTable[j].m_ratesTable[i].numRateAttempt;
1216 if (station->
m_groupsTable[j].m_ratesTable[i].successHist == 0)
1218 station->
m_groupsTable[j].m_ratesTable[i].ewmaProb = tempProb;
1223 tempProb, station->
m_groupsTable[j].m_ratesTable[i].ewmaProb,
1227 station->
m_groupsTable[j].m_ratesTable[i].ewmaProb = tempProb;
1237 station->
m_groupsTable[j].m_ratesTable[i].numSamplesSkipped++;
1243 station->
m_groupsTable[j].m_ratesTable[i].numRateSuccess = 0;
1244 station->
m_groupsTable[j].m_ratesTable[i].numRateAttempt = 0;
1246 if (station->
m_groupsTable[j].m_ratesTable[i].throughput != 0)
1290 Time txTime = station->
m_groupsTable[groupId].m_ratesTable[rateId].perfectTxTime;
1307 uint8_t tmpGroupId, tmpRateId;
1308 double tmpTh, tmpProb;
1309 uint8_t groupId, rateId;
1312 uint8_t maxGPGroupId, maxGPRateId;
1322 tmpProb = station->
m_groupsTable[tmpGroupId].m_ratesTable[tmpRateId].ewmaProb;
1323 tmpTh = station->
m_groupsTable[tmpGroupId].m_ratesTable[tmpRateId].throughput;
1327 currentTh = station->
m_groupsTable[groupId].m_ratesTable[rateId].throughput;
1328 if (currentTh > tmpTh)
1335 maxGPTh = station->
m_groupsTable[maxGPGroupId].m_ratesTable[maxGPRateId].throughput;
1337 if (currentTh > maxGPTh)
1366 uint8_t groupId, rateId;
1368 uint8_t maxTpGroupId, maxTpRateId;
1369 uint8_t maxTp2GroupId, maxTp2RateId;
1370 double maxTpTh, maxTpProb;
1371 double maxTp2Th, maxTp2Prob;
1375 prob = station->
m_groupsTable[groupId].m_ratesTable[rateId].ewmaProb;
1376 th = station->
m_groupsTable[groupId].m_ratesTable[rateId].throughput;
1380 maxTpProb = station->
m_groupsTable[maxTpGroupId].m_ratesTable[maxTpRateId].ewmaProb;
1381 maxTpTh = station->
m_groupsTable[maxTpGroupId].m_ratesTable[maxTpRateId].throughput;
1385 maxTp2Prob = station->
m_groupsTable[maxTp2GroupId].m_ratesTable[maxTp2RateId].ewmaProb;
1386 maxTp2Th = station->
m_groupsTable[maxTp2GroupId].m_ratesTable[maxTp2RateId].throughput;
1388 if (th > maxTpTh || (th == maxTpTh && prob > maxTpProb))
1393 else if (th > maxTp2Th || (th == maxTp2Th && prob > maxTp2Prob))
1404 maxTpTh = station->
m_groupsTable[maxTpGroupId].m_ratesTable[maxTpRateId].throughput;
1408 maxTp2Prob = group->
m_ratesTable[maxTp2RateId].ewmaProb;
1409 maxTp2Th = station->
m_groupsTable[maxTp2GroupId].m_ratesTable[maxTp2RateId].throughput;
1411 if (th > maxTpTh || (th == maxTpTh && prob > maxTpProb))
1416 else if (th > maxTp2Th || (th == maxTp2Th && prob > maxTp2Prob))
1433 for (uint8_t groupId = 0; groupId <
m_numGroups; groupId++)
1454 station->
m_groupsTable[groupId].m_ratesTable[i].supported =
false;
1458 for (uint8_t i = 0; i < station->
m_nModes; i++)
1478 station->
m_groupsTable[groupId].m_ratesTable[rateId].supported =
true;
1479 station->
m_groupsTable[groupId].m_ratesTable[rateId].mcsIndex = i;
1480 station->
m_groupsTable[groupId].m_ratesTable[rateId].numRateAttempt = 0;
1481 station->
m_groupsTable[groupId].m_ratesTable[rateId].numRateSuccess = 0;
1482 station->
m_groupsTable[groupId].m_ratesTable[rateId].prob = 0;
1483 station->
m_groupsTable[groupId].m_ratesTable[rateId].ewmaProb = 0;
1484 station->
m_groupsTable[groupId].m_ratesTable[rateId].prevNumRateAttempt = 0;
1485 station->
m_groupsTable[groupId].m_ratesTable[rateId].prevNumRateSuccess = 0;
1486 station->
m_groupsTable[groupId].m_ratesTable[rateId].numSamplesSkipped = 0;
1487 station->
m_groupsTable[groupId].m_ratesTable[rateId].successHist = 0;
1488 station->
m_groupsTable[groupId].m_ratesTable[rateId].attemptHist = 0;
1489 station->
m_groupsTable[groupId].m_ratesTable[rateId].throughput = 0;
1491 station->
m_groupsTable[groupId].m_ratesTable[rateId].retryCount = 0;
1492 station->
m_groupsTable[groupId].m_ratesTable[rateId].adjustedRetryCount = 0;
1510 if (!station->
m_groupsTable[groupId].m_ratesTable[rateId].retryUpdated)
1522 uint32_t cwMax = 1023;
1523 Time cwTime, txTime, dataTxTime;
1527 if (station->
m_groupsTable[groupId].m_ratesTable[rateId].ewmaProb < 1)
1529 station->
m_groupsTable[groupId].m_ratesTable[rateId].retryCount = 1;
1533 station->
m_groupsTable[groupId].m_ratesTable[rateId].retryCount = 2;
1534 station->
m_groupsTable[groupId].m_ratesTable[rateId].retryUpdated =
true;
1540 cwTime = (cw / 2) * slotTime;
1541 cw =
Min ((cw + 1) * 2, cwMax);
1542 cwTime += (cw / 2) * slotTime;
1543 cw =
Min ((cw + 1) * 2, cwMax);
1546 txTime = cwTime + 2 * (dataTxTime + ackTime);
1552 cwTime = (cw / 2) * slotTime;
1553 cw =
Min ((cw + 1) * 2, cwMax);
1556 txTime += cwTime + ackTime + dataTxTime;
1559 && (++station->
m_groupsTable[groupId].m_ratesTable[rateId].retryCount < 7));
1566 double diff, incr, tmp;
1569 diff = currentProb - ewmaProb;
1570 incr = (100 - weight) * diff / 100;
1571 tmp = oldEwmsd * oldEwmsd;
1572 tmp = weight * (tmp + diff * incr) / 100;
1590 for (uint8_t i = 0; i < numSampleRates; i++ )
1597 newIndex = (i + uv) % numSampleRates;
1614 std::ostringstream tmp;
1616 station->
m_statsFile.open (tmp.str ().c_str (), std::ios::out);
1619 station->
m_statsFile <<
" best ____________rate__________ ________statistics________ ________last_______ ______sum-of________\n" <<
1620 " mode guard # rate [name idx airtime max_tp] [avg(tp) avg(prob) sd(prob)] [prob.|retry|suc|att] [#success | #attempts]\n";
1648 for (uint8_t i = 0; i < numRates; i++)
1654 of <<
"HT" << group.
chWidth <<
" " << giMode <<
"GI " << (int)group.
streams <<
" ";
1658 of <<
"VHT" << group.
chWidth <<
" " << giMode <<
"GI " << (int)group.
streams <<
" ";
1665 uint16_t idx =
GetIndex (groupId, i);
1666 if (idx == maxTpRate)
1674 if (idx == maxTpRate2)
1682 if (idx == maxProbRate)
1693 of << std::setw (4) <<
" MCS" << (group.
streams - 1) * 8 + i;
1697 of << std::setw (7) <<
" MCS" << +i <<
"/" << (int) group.
streams;
1700 of <<
" " << std::setw (3) << +idx <<
" ";
1707 std::setw (7) << station->
m_groupsTable[groupId].m_ratesTable[i].throughput / 100 <<
" " <<
1708 std::setw (7) << station->
m_groupsTable[groupId].m_ratesTable[i].ewmaProb <<
" " <<
1709 std::setw (7) << station->
m_groupsTable[groupId].m_ratesTable[i].ewmsdProb <<
" " <<
1710 std::setw (7) << station->
m_groupsTable[groupId].m_ratesTable[i].prob <<
" " <<
1711 std::setw (2) << station->
m_groupsTable[groupId].m_ratesTable[i].retryCount <<
" " <<
1712 std::setw (3) << station->
m_groupsTable[groupId].m_ratesTable[i].prevNumRateSuccess <<
" " <<
1713 std::setw (3) << station->
m_groupsTable[groupId].m_ratesTable[i].prevNumRateAttempt <<
" " <<
1714 std::setw (9) << station->
m_groupsTable[groupId].m_ratesTable[i].successHist <<
" " <<
1715 std::setw (9) << station->
m_groupsTable[groupId].m_ratesTable[i].attemptHist <<
"\n";
1763 uint8_t groupId = 0;
1765 while (groupId < m_numGroups && !station->m_groupsTable[groupId].m_supported)
1769 while (rateId < m_numRates && !station->m_groupsTable[groupId].m_ratesTable[rateId].supported)
1783 while (rateId < m_numRates && !station->m_groupsTable[groupId].m_ratesTable[rateId].supported)
1797 vhtMcsList.push_back (mode);
1808 htMcsList.push_back (mode);
uint16_t m_maxProbRate
The highest success probability rate of this group in bps.
uint8_t GetNMcsSupported(Mac48Address address) const
Return the number of MCS supported by the station.
uint16_t m_maxProbRate
rate with highest probability of success in bps
void DoReportAmpduTxStatus(WifiRemoteStation *station, uint16_t nSuccessfulMpdus, uint16_t nFailedMpdus, double rxSnr, double dataSnr, uint16_t dataChannelWidth, uint8_t dataNss) override
Typically called per A-MPDU, either when a Block ACK was successfully received or when a BlockAckTime...
void SetupPhy(const Ptr< WifiPhy > phy) override
Set up PHY associated with this device since it is the object that knows the full set of transmit rat...
uint8_t m_nSampleCol
Number of sample columns.
void DoReportRtsFailed(WifiRemoteStation *station) override
This method is a pure virtual method that must be implemented by the sub-class.
Simulation virtual time values and global simulation resolution.
Time GetMpduTxTime(uint8_t groupId, WifiMode mode) const
Obtain the TxTime saved in the group information.
bool GetVhtSupported(void) const
Return whether the device has VHT capability support enabled.
A struct to contain information of a group.
#define NS_LOG_FUNCTION(parameters)
If log level LOG_FUNCTION is enabled, this macro will output all input parameters separated by "...
WifiModeList GetVhtDeviceMcsList(void) const
Returns a list of only the VHT MCS supported by the device.
void SetStream(int64_t stream)
Specifies the stream number for the RngStream.
bool DoNeedRetransmission(WifiRemoteStation *st, Ptr< const Packet > packet, bool normally) override
uint8_t m_sampleGroup
The group that the sample rate belongs to.
AttributeValue implementation for Boolean.
This class mimics the TXVECTOR which is to be passed to the PHY in order to define the parameters whi...
static const uint8_t MAX_SUPPORTED_STREAMS
Constants for maximum values.
TracedValue< uint64_t > m_currentRate
Trace rate changes.
uint8_t m_index
vector index
#define NS_OBJECT_ENSURE_REGISTERED(type)
Register an Object subclass with the TypeId system.
void SetChannelWidth(uint16_t channelWidth)
Sets the selected channelWidth (in MHz)
void PrintTable(MinstrelHtWifiRemoteStation *station)
Printing Minstrel Table.
uint16_t GetLowestIndex(MinstrelHtWifiRemoteStation *station)
Returns the lowest global index of the rates supported by the station.
uint8_t GetNumberOfAntennas(void) const
void SetBestProbabilityRate(MinstrelHtWifiRemoteStation *station, uint16_t index)
Set index rate as maxProbRate if it is better than current value.
uint16_t m_maxTpRate
the current throughput rate in bps
uint16_t m_txrate
current transmit rate in bps
Ptr< const AttributeAccessor > MakeBooleanAccessor(T1 a1)
Create an AttributeAccessor for a class data member, or a lone class get functor or set method...
MinstrelHtWifiRemoteStation structure.
uint16_t m_maxTpRate2
second highest throughput rate in bps
double GetSeconds(void) const
Get an approximation of the time stored in this instance in the indicated unit.
void DoReportFinalDataFailed(WifiRemoteStation *station) override
This method is a pure virtual method that must be implemented by the sub-class.
hold per-remote-station state for Minstrel Wifi manager.
void CalculateRetransmits(MinstrelHtWifiRemoteStation *station, uint16_t index)
Calculate the number of retransmissions to set for the index rate.
uint32_t m_ampduPacketCount
Number of A-MPDUs transmitted.
void DoInitialize(void) override
Initialize() implementation.
static const uint8_t MAX_VHT_STREAM_GROUPS
Maximal number of groups per stream in VHT (4 possible channel widths and 2 possible SGI configuratio...
bool GetHeSupported(void) const
Return whether the device has HE capability support enabled.
#define NS_ASSERT(condition)
At runtime, in debugging builds, if this condition is not true, the program prints the source file...
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Time MilliSeconds(uint64_t value)
Construct a Time in the indicated unit.
uint16_t m_sampleRate
current sample rate in bps
void SetStbc(bool stbc)
Sets if STBC is being used.
Mac48Address m_address
Mac48Address of the remote station.
Time m_legacyUpdateStats
How frequent do we calculate the stats for legacy MinstrelWifiManager.
HtMinstrelRate m_ratesTable
Information about rates of this group.
#define NS_LOG_INFO(msg)
Use NS_LOG to output a message of level LOG_INFO.
#define NS_FATAL_ERROR(msg)
Report a fatal error with a message and terminate.
uint8_t sgi
short guard interval (0 or 1)
uint16_t FindRate(MinstrelHtWifiRemoteStation *station)
Find a rate to use from Minstrel Table.
MinstrelRate m_minstrelTable
minstrel table
uint32_t m_frameLength
Frame length used for calculate modes TxTime in bytes.
MinstrelMcsGroups m_minstrelGroups
Global array for groups information.
WifiPreamble GetPreambleForTransmission(WifiModulationClass modulation, bool useShortPreamble)
Return the preamble to be used for the transmission.
bool m_isHt
If the station is HT capable.
bool m_sampleDeferred
a flag to indicate sample rate is on the second stage
std::vector< std::vector< uint8_t > > SampleRate
Data structure for a Sample Rate table A vector of a vector uint8_t.
represent a single transmission modeA WifiMode is implemented by a single integer which is used to lo...
std::vector< RateInfo > MinstrelRate
Data structure for a Minstrel Rate table A vector of a struct RateInfo.
WifiRemoteStation * DoCreateStation(void) const override
uint8_t m_nModes
number of modes supported
uint8_t GetRateId(uint16_t index)
For managing rates from different groups, a global index for all rates in all groups is used...
WifiRemoteStationState * m_state
Remote station state.
bool m_printStats
If statistics table should be printed.
MpduType
The type of an MPDU.
uint16_t GetIndex(uint8_t groupId, uint8_t rateId)
Returns the global index corresponding to the groupId and rateId.
Ptr< const TraceSourceAccessor > MakeTraceSourceAccessor(T a)
Create a TraceSourceAccessor which will control access to the underlying trace source.
uint8_t m_lookAroundRate
The % to try other rates than our current rate.
uint8_t m_ewmaLevel
Exponential weighted moving average level (or coefficient).
WifiMode GetMode(uint16_t staId=SU_STA_ID) const
If this TX vector is associated with an SU PPDU, return the selected payload transmission mode...
void SetBestStationThRates(MinstrelHtWifiRemoteStation *station, uint16_t index)
Set index rate as maxTpRate or maxTp2Rate if is better than current values.
void SetupMac(const Ptr< WifiMac > mac) override
Set up MAC associated with this device since it is the object that knows the full set of timing param...
Time GetFirstMpduTxTime(uint8_t groupId, WifiMode mode) const
Obtain the TxTime saved in the group information.
uint8_t GetNumberOfSupportedStreams(Mac48Address address) const
Return the number of spatial streams supported by the station.
bool GetShortPreambleEnabled(void) const
Return whether the device uses short PHY preambles.
int64x64_t Min(const int64x64_t &a, const int64x64_t &b)
Minimum.
The MPDU is the first aggregate in an A-MPDU with multiple MPDUs, but is not the last aggregate...
uint16_t chWidth
channel width (MHz)
bool m_isSampling
a flag to indicate we are currently sampling
bool IsValid(void) const
The standard disallows certain combinations of WifiMode, number of spatial streams, and channel widths.
WifiTxVector DoGetDataTxVector(WifiRemoteStation *station) override
AttributeValue implementation for Time.
SampleRate m_sampleTable
sample table
uint8_t m_col
To keep track of the current position in the our random sample table going row by row from 1st column...
void SetGuardInterval(uint16_t guardInterval)
Sets the guard interval duration (in nanoseconds)
Hold an unsigned integer type.
static const uint8_t MAX_VHT_GROUP_RATES
Number of rates (or MCS) per VHT group.
static const uint8_t MAX_HT_WIDTH
Maximal channel width in MHz.
virtual ~MinstrelHtWifiManager()
bool GetHtSupported(void) const
Return whether the device has HT capability support enabled.
The MPDU is part of an A-MPDU with multiple MPDUs, but is neither the first nor the last aggregate...
int64x64_t Max(const int64x64_t &a, const int64x64_t &b)
Maximum.
static const uint8_t MAX_HT_STREAM_GROUPS
Maximal number of groups per stream in HT (2 possible channel widths and 2 possible SGI configuration...
uint32_t m_sampleWait
How many transmission attempts to wait until a new sample.
virtual void SetupPhy(const Ptr< WifiPhy > phy)
Set up PHY associated with this device since it is the object that knows the full set of transmit rat...
Ptr< UniformRandomVariable > m_uniformRandomVariable
Provides uniform random variables.
hold a list of per-remote-station state.
WifiModulationClass GetModulationClass() const
bool m_useVhtOnly
If only VHT MCS should be used, instead of HT and VHT.
std::vector< struct GroupInfo > McsGroupData
Data structure for a table of groups.
uint32_t m_longRetry
long retries such as data packets
static TypeId GetTypeId(void)
Get the type ID.
static const uint8_t MAX_VHT_WIDTH
Maximal channel width in MHz.
uint32_t m_ampduLen
Number of MPDUs in an A-MPDU.
void SetNss(uint8_t nss)
Sets the number of Nss.
bool m_initialized
for initializing tables
Time GetBlockAckTxTime(void) const
Return the estimated BlockAck TX time for this PHY.
int64_t GetMicroSeconds(void) const
Get an approximation of the time stored in this instance in the indicated unit.
uint16_t GetNextSample(MinstrelHtWifiRemoteStation *station)
Getting the next sample from Sample Table.
uint16_t m_maxTpRate2
The second max throughput rate of this group in bps.
double ewmaProb
Exponential weighted moving average of probability.
Time perfectTxTime
Perfect transmission time calculation, or frame calculation.
bool IsValidMcs(Ptr< WifiPhy > phy, uint8_t streams, uint16_t chWidth, WifiMode mode)
Check the validity of a combination of number of streams, chWidth and mode.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
uint8_t m_numRates
Number of rates per group Minstrel should consider.
void InitSampleTable(MinstrelHtWifiRemoteStation *station)
Initialize Sample Table.
void SetPreambleType(WifiPreamble preamble)
Sets the preamble type.
double CalculateThroughput(MinstrelHtWifiRemoteStation *station, uint8_t groupId, uint8_t rateId, double ewmaProb)
Return the average throughput of the MCS defined by groupId and rateId.
void UpdateRetry(MinstrelHtWifiRemoteStation *station)
Update the number of retries and reset accordingly.
uint32_t m_sampleCount
Max number of samples per update interval.
uint16_t GetChannelWidthForTransmission(WifiMode mode, uint16_t maxSupportedChannelWidth)
Return the channel width that corresponds to the selected mode (instead of letting the PHY's default ...
uint8_t m_numGroups
Number of groups Minstrel should consider.
Time m_updateStats
How frequent do we calculate the stats.
void DoReportFinalRtsFailed(WifiRemoteStation *station) override
This method is a pure virtual method that must be implemented by the sub-class.
static const uint8_t MAX_HT_GROUP_RATES
Number of rates (or MCS) per HT group.
void UpdateStats(MinstrelHtWifiRemoteStation *station)
Update the Minstrel Table.
McsGroupData m_groupsTable
Table of groups with stats.
Ptr< const AttributeAccessor > MakeTimeAccessor(T1 a1)
Create an AttributeAccessor for a class data member, or a lone class get functor or set method...
std::vector< WifiMode > WifiModeList
In various parts of the code, folk are interested in maintaining a list of transmission modes...
uint16_t m_maxTpRate
The max throughput rate of this group in bps.
bool GetShortGuardIntervalSupported(void) const
Return whether the device has SGI support enabled.
static Time Now(void)
Return the current simulation virtual time.
std::vector< HtRateInfo > HtMinstrelRate
Data structure for a Minstrel Rate table.
std::ofstream m_statsFile
File where statistics table is written.
void RateInit(MinstrelHtWifiRemoteStation *station)
Initialize Minstrel Table.
int m_totalPacketsCount
total number of packets as of now
bool GetAggregation(const WifiRemoteStation *station) const
Return whether the given station supports A-MPDU.
Implementation of Minstrel HT Rate Control AlgorithmMinstrel-HT is a rate adaptation mechanism for th...
int64_t AssignStreams(int64_t stream) override
Assign a fixed random variable stream number to the random variables used by this model...
void SetMode(WifiMode mode)
Sets the selected payload transmission mode.
Data structure to contain the information that defines a group.
#define NS_ASSERT_MSG(condition, message)
At runtime, in debugging builds, if this condition is not true, the program prints the message to out...
void DoReportDataFailed(WifiRemoteStation *station) override
This method is a pure virtual method that must be implemented by the sub-class.
uint8_t GetNBasicModes(void) const
Return the number of basic modes we support.
void StatsDump(MinstrelHtWifiRemoteStation *station, uint8_t groupId, std::ofstream &of)
Print group statistics.
uint64_t GetNonHtReferenceRate(void) const
int m_samplePacketsCount
how many packets we have sample so far
virtual void SetupMac(const Ptr< WifiMac > mac)
Set up MAC associated with this device since it is the object that knows the full set of timing param...
void DoReportRxOk(WifiRemoteStation *station, double rxSnr, WifiMode txMode) override
This method is a pure virtual method that must be implemented by the sub-class.
void UpdatePacketCounters(MinstrelHtWifiRemoteStation *station, uint16_t nSuccessfulMpdus, uint16_t nFailedMpdus)
Update the number of sample count variables.
Ptr< WifiPhy > GetPhy(void) const
Return the WifiPhy.
uint8_t GetVhtGroupId(uint8_t txstreams, uint8_t sgi, uint16_t chWidth)
Returns the groupId of a VHT MCS with the given number of streams, if using SGI and the channel width...
double CalculateEwmsd(double oldEwmsd, double currentProb, double ewmaProb, double weight)
Perform EWMSD (Exponentially Weighted Moving Standard Deviation) calculation.
Time GetSifs(void) const
Return the Short Interframe Space (SIFS) for this PHY.
void DoReportRtsOk(WifiRemoteStation *station, double ctsSnr, WifiMode ctsMode, double rtsSnr) override
This method is a pure virtual method that must be implemented by the sub-class.
std::vector< McsGroup > MinstrelMcsGroups
Data structure for a table of group definitions.
void AddMpduTxTime(uint8_t groupId, WifiMode mode, Time t)
Save a TxTime to the vector of groups.
WifiTxVector DoGetRtsTxVector(WifiRemoteStation *station) override
A struct to contain all statistics information related to a data rate.
void SetNextSample(MinstrelHtWifiRemoteStation *station)
Set the next sample from Sample Table.
#define NS_LOG_DEBUG(msg)
Use NS_LOG to output a message of level LOG_DEBUG.
WifiModeList GetHtDeviceMcsList(void) const
Returns a list of only the HT MCS supported by the device.
uint32_t m_numSamplesSlow
Number of times a slow rate was sampled.
Ptr< const AttributeChecker > MakeBooleanChecker(void)
Ptr< MinstrelWifiManager > m_legacyManager
Pointer to an instance of MinstrelWifiManager.
uint32_t numSamplesSkipped
Number of times this rate statistics were not updated because no attempts have been made...
static Time GetPayloadDuration(uint32_t size, const WifiTxVector &txVector, WifiPhyBand band, MpduType mpdutype=NORMAL_MPDU, uint16_t staId=SU_STA_ID)
Time GetSlot(void) const
Return the slot duration for this PHY.
uint8_t GetDefaultTxPowerLevel(void) const
static Time CalculatePhyPreambleAndHeaderDuration(const WifiTxVector &txVector)
uint32_t m_sampleTries
Number of sample tries after waiting sampleWait.
uint8_t GetHtGroupId(uint8_t txstreams, uint8_t sgi, uint16_t chWidth)
Returns the groupId of a HT MCS with the given number of streams, if using SGI and the channel width ...
void SetNess(uint8_t ness)
Sets the Ness number.
uint8_t GetGroupId(uint16_t index)
Return the groupId from the global index.
Ptr< const AttributeChecker > MakeTimeChecker(const Time min, const Time max)
Helper to make a Time checker with bounded range.
Time CalculateMpduTxDuration(Ptr< WifiPhy > phy, uint8_t streams, uint8_t sgi, uint16_t chWidth, WifiMode mode, MpduType mpduType)
Estimates the TxTime of a frame with a given mode and group (stream, guard interval and channel width...
uint32_t m_avgAmpduLen
Average number of MPDUs in an A-MPDU.
uint32_t CountRetries(MinstrelHtWifiRemoteStation *station)
Count retries.
void DoReportDataOk(WifiRemoteStation *station, double ackSnr, WifiMode ackMode, double dataSnr, uint16_t dataChannelWidth, uint8_t dataNss) override
This method is a pure virtual method that must be implemented by the sub-class.
void UpdateRate(MinstrelHtWifiRemoteStation *station)
Update rate.
uint32_t m_shortRetry
short retries such as control packets
WifiMode GetBasicMode(uint8_t i) const
Return a basic mode from the set of basic modes.
uint8_t GetMcsValue(void) const
Ptr< const AttributeAccessor > MakeUintegerAccessor(T1 a1)
Create an AttributeAccessor for a class data member, or a lone class get functor or set method...
void AddFirstMpduTxTime(uint8_t groupId, WifiMode mode, Time t)
Save a TxTime to the vector of groups.
a unique identifier for an interface.
TypeId SetParent(TypeId tid)
Set the parent TypeId.
void CheckInit(MinstrelHtWifiRemoteStation *station)
Check for initializations.
hold per-remote-station state.
uint64_t GetDataRate(uint16_t channelWidth, uint16_t guardInterval, uint8_t nss) const
WifiMode GetMcsSupported(const WifiRemoteStation *station, uint8_t i) const
Return the WifiMode supported by the specified station at the specified index.
uint16_t GetChannelWidth(const WifiRemoteStation *station) const
Return the channel width supported by the station.
uint8_t GetNess(const WifiRemoteStation *station) const
Time m_nextStatsUpdate
10 times every second