A Discrete-Event Network Simulator
API
dsss-phy.cc
Go to the documentation of this file.
1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2020 Orange Labs
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Authors: Rediet <getachew.redieteab@orange.com>
19  * S├ębastien Deronne <sebastien.deronne@gmail.com> (for logic ported from wifi-phy)
20  * Mathieu Lacage <mathieu.lacage@sophia.inria.fr> (for logic ported from wifi-phy)
21  */
22 
23 #include <array>
24 #include "dsss-phy.h"
25 #include "dsss-ppdu.h"
26 #include "ns3/wifi-psdu.h"
27 #include "ns3/wifi-phy.h" //only used for static mode constructor
28 #include "ns3/wifi-utils.h"
29 #include "ns3/simulator.h"
30 #include "ns3/log.h"
31 
32 namespace ns3 {
33 
34 NS_LOG_COMPONENT_DEFINE ("DsssPhy");
35 
36 /*******************************************************
37  * HR/DSSS PHY (IEEE 802.11-2016, clause 16)
38  *******************************************************/
39 
40 /* *NS_CHECK_STYLE_OFF* */
42  { WIFI_PREAMBLE_LONG, { WIFI_PPDU_FIELD_PREAMBLE, //PHY preamble
43  WIFI_PPDU_FIELD_NON_HT_HEADER, //PHY header
45  { WIFI_PREAMBLE_SHORT, { WIFI_PPDU_FIELD_PREAMBLE, //Short PHY preamble
46  WIFI_PPDU_FIELD_NON_HT_HEADER, //Short PHY header
48 };
49 
51  // Unique name Code rate Constellation size
52  { "DsssRate1Mbps", { WIFI_CODE_RATE_UNDEFINED, 2 } },
53  { "DsssRate2Mbps", { WIFI_CODE_RATE_UNDEFINED, 4 } },
54  { "DsssRate5_5Mbps", { WIFI_CODE_RATE_UNDEFINED, 16 } },
55  { "DsssRate11Mbps", { WIFI_CODE_RATE_UNDEFINED, 256 } }
56 };
57 /* *NS_CHECK_STYLE_ON* */
58 
60 static const std::array<uint64_t, 4> s_dsssRatesBpsList = {1000000, 2000000, 5500000, 11000000};
61 
67 const std::array<uint64_t, 4>& GetDsssRatesBpsList (void)
68 {
69  return s_dsssRatesBpsList;
70 };
71 
73 {
74  NS_LOG_FUNCTION (this);
75  for (const auto & rate : GetDsssRatesBpsList ())
76  {
77  WifiMode mode = GetDsssRate (rate);
78  NS_LOG_LOGIC ("Add " << mode << " to list");
79  m_modeList.emplace_back (mode);
80  }
81 }
82 
84 {
85  NS_LOG_FUNCTION (this);
86 }
87 
89 DsssPhy::GetSigMode (WifiPpduField field, const WifiTxVector& txVector) const
90 {
91  switch (field)
92  {
93  case WIFI_PPDU_FIELD_PREAMBLE: //consider header mode for preamble (useful for InterferenceHelper)
95  return GetHeaderMode (txVector);
96  default:
97  return PhyEntity::GetSigMode (field, txVector);
98  }
99 }
100 
101 WifiMode
102 DsssPhy::GetHeaderMode (const WifiTxVector& txVector) const
103 {
104  if (txVector.GetPreambleType () == WIFI_PREAMBLE_LONG
105  || txVector.GetMode () == GetDsssRate1Mbps ())
106  {
107  //Section 16.2.3 "PPDU field definitions" and Section 16.2.2.2 "Long PPDU format"; IEEE Std 802.11-2016
108  return GetDsssRate1Mbps ();
109  }
110  else
111  {
112  //Section 16.2.2.3 "Short PPDU format"; IEEE Std 802.11-2016
113  return GetDsssRate2Mbps ();
114  }
115 }
116 
119 {
120  return m_dsssPpduFormats;
121 }
122 
123 Time
124 DsssPhy::GetDuration (WifiPpduField field, const WifiTxVector& txVector) const
125 {
126  if (field == WIFI_PPDU_FIELD_PREAMBLE)
127  {
128  return GetPreambleDuration (txVector); //SYNC + SFD or shortSYNC + shortSFD
129  }
130  else if (field == WIFI_PPDU_FIELD_NON_HT_HEADER)
131  {
132  return GetHeaderDuration (txVector); //PHY header or short PHY header
133  }
134  else
135  {
136  return PhyEntity::GetDuration (field, txVector);
137  }
138 }
139 
140 Time
142 {
143  if (txVector.GetPreambleType () == WIFI_PREAMBLE_SHORT
144  && (txVector.GetMode ().GetDataRate (22) > 1000000))
145  {
146  //Section 16.2.2.3 "Short PPDU format" Figure 16-2 "Short PPDU format"; IEEE Std 802.11-2016
147  return MicroSeconds (72);
148  }
149  else
150  {
151  //Section 16.2.2.2 "Long PPDU format" Figure 16-1 "Long PPDU format"; IEEE Std 802.11-2016
152  return MicroSeconds (144);
153  }
154 }
155 
156 Time
158 {
159  if (txVector.GetPreambleType () == WIFI_PREAMBLE_SHORT
160  && (txVector.GetMode ().GetDataRate (22) > 1000000))
161  {
162  //Section 16.2.2.3 "Short PPDU format" and Figure 16-2 "Short PPDU format"; IEEE Std 802.11-2016
163  return MicroSeconds (24);
164  }
165  else
166  {
167  //Section 16.2.2.2 "Long PPDU format" and Figure 16-1 "Short PPDU format"; IEEE Std 802.11-2016
168  return MicroSeconds (48);
169  }
170 }
171 
172 Time
173 DsssPhy::GetPayloadDuration (uint32_t size, const WifiTxVector& txVector, WifiPhyBand /* band */, MpduType /* mpdutype */,
174  bool /* incFlag */, uint32_t & /* totalAmpduSize */, double & /* totalAmpduNumSymbols */,
175  uint16_t /* staId */) const
176 {
177  return MicroSeconds (lrint (ceil ((size * 8.0) / (txVector.GetMode ().GetDataRate (22) / 1.0e6))));
178 }
179 
181 DsssPhy::BuildPpdu (const WifiConstPsduMap & psdus, const WifiTxVector& txVector, Time ppduDuration)
182 {
183  NS_LOG_FUNCTION (this << psdus << txVector << ppduDuration);
184  return Create<DsssPpdu> (psdus.begin ()->second, txVector, ppduDuration,
185  ObtainNextUid (txVector));
186 }
187 
190 {
191  NS_LOG_FUNCTION (this << field << *event);
192  if (field == WIFI_PPDU_FIELD_NON_HT_HEADER)
193  {
194  return EndReceiveHeader (event); //PHY header or short PHY header
195  }
196  return PhyEntity::DoEndReceiveField (field, event);
197 }
198 
201 {
202  NS_LOG_FUNCTION (this << *event);
204  NS_LOG_DEBUG ("Long/Short PHY header: SNR(dB)=" << RatioToDb (snrPer.snr) << ", PER=" << snrPer.per);
205  PhyFieldRxStatus status (GetRandomValue () > snrPer.per);
206  if (status.isSuccess)
207  {
208  NS_LOG_DEBUG ("Received long/short PHY header");
209  if (!IsConfigSupported (event->GetPpdu ()))
210  {
211  status = PhyFieldRxStatus (false, UNSUPPORTED_SETTINGS, DROP);
212  }
213  }
214  else
215  {
216  NS_LOG_DEBUG ("Abort reception because long/short PHY header reception failed");
217  status.reason = L_SIG_FAILURE;
218  status.actionIfFailure = ABORT;
219  }
220  return status;
221 }
222 
223 uint16_t
225 {
226  if (m_wifiPhy->GetChannelWidth () > 20)
227  {
228  /*
229  * This is a workaround necessary with HE-capable PHYs,
230  * since their DSSS entity will reuse its RxSpectrumModel.
231  * Without this hack, SpectrumWifiPhy::GetBand will crash.
232  * FIXME: see issue #402 for a better solution.
233  */
234  return 20;
235  }
236  return PhyEntity::GetRxChannelWidth (txVector);
237 }
238 
241 {
242  const WifiTxVector& txVector = ppdu->GetTxVector ();
243  uint16_t centerFrequency = GetCenterFrequencyForChannelWidth (txVector);
244  uint16_t channelWidth = txVector.GetChannelWidth ();
245  NS_LOG_FUNCTION (this << centerFrequency << channelWidth << txPowerW);
246  NS_ABORT_MSG_IF (channelWidth != 22, "Invalid channel width for DSSS");
248  return v;
249 }
250 
251 void
253 {
254  for (const auto & rate : GetDsssRatesBpsList ())
255  {
256  GetDsssRate (rate);
257  }
258 }
259 
260 WifiMode
261 DsssPhy::GetDsssRate (uint64_t rate)
262 {
263  switch (rate)
264  {
265  case 1000000:
266  return GetDsssRate1Mbps ();
267  case 2000000:
268  return GetDsssRate2Mbps ();
269  case 5500000:
270  return GetDsssRate5_5Mbps ();
271  case 11000000:
272  return GetDsssRate11Mbps ();
273  default:
274  NS_ABORT_MSG ("Inexistent rate (" << rate << " bps) requested for HR/DSSS");
275  return WifiMode ();
276  }
277 }
278 
279 #define GET_DSSS_MODE(x, m) \
280 WifiMode \
281 DsssPhy::Get ## x (void) \
282 { \
283  static WifiMode mode = CreateDsssMode (#x, WIFI_MOD_CLASS_ ## m); \
284  return mode; \
285 }; \
286 
287 // Clause 15 rates (DSSS)
288 GET_DSSS_MODE (DsssRate1Mbps, DSSS)
289 GET_DSSS_MODE (DsssRate2Mbps, DSSS)
290 // Clause 16 rates (HR/DSSS)
291 GET_DSSS_MODE (DsssRate5_5Mbps, HR_DSSS)
292 GET_DSSS_MODE (DsssRate11Mbps, HR_DSSS)
293 #undef GET_DSSS_MODE
294 
295 WifiMode
296 DsssPhy::CreateDsssMode (std::string uniqueName,
297  WifiModulationClass modClass)
298 {
299  // Check whether uniqueName is in lookup table
300  const auto it = m_dsssModulationLookupTable.find (uniqueName);
301  NS_ASSERT_MSG (it != m_dsssModulationLookupTable.end (), "DSSS or HR/DSSS mode cannot be created because it is not in the lookup table!");
302  NS_ASSERT_MSG (modClass == WIFI_MOD_CLASS_DSSS || modClass == WIFI_MOD_CLASS_HR_DSSS, "DSSS or HR/DSSS mode must be either WIFI_MOD_CLASS_DSSS or WIFI_MOD_CLASS_HR_DSSS!");
303 
304  return WifiModeFactory::CreateWifiMode (uniqueName,
305  modClass,
306  true,
307  MakeBoundCallback (&GetCodeRate, uniqueName),
309  MakeBoundCallback (&GetDataRate, uniqueName, modClass), //PhyRate is equivalent to DataRate
310  MakeCallback (&GetDataRateFromTxVector), //PhyRate is equivalent to DataRate
311  MakeBoundCallback (&GetDataRate, uniqueName, modClass),
314 }
315 
317 DsssPhy::GetCodeRate (const std::string& name)
318 {
319  return m_dsssModulationLookupTable.at (name).first;
320 }
321 
322 uint16_t
323 DsssPhy::GetConstellationSize (const std::string& name)
324 {
325  return m_dsssModulationLookupTable.at (name).second;
326 }
327 
328 uint64_t
329 DsssPhy::GetDataRateFromTxVector (const WifiTxVector& txVector, uint16_t /* staId */)
330 {
331  WifiMode mode = txVector.GetMode ();
332  return DsssPhy::GetDataRate (mode.GetUniqueName (),
333  mode.GetModulationClass (),
334  22, 0, 1); //dummy values since unused
335 }
336 
337 uint64_t
338 DsssPhy::GetDataRate (const std::string& name, WifiModulationClass modClass, uint16_t /* channelWidth */, uint16_t /* guardInterval */, uint8_t /* nss */)
339 {
340  uint16_t constellationSize = GetConstellationSize (name);
341  uint16_t divisor = 0;
342  if (modClass == WIFI_MOD_CLASS_DSSS)
343  {
344  divisor = 11;
345  }
346  else if (modClass == WIFI_MOD_CLASS_HR_DSSS)
347  {
348  divisor = 8;
349  }
350  else
351  {
352  NS_FATAL_ERROR ("Incorrect modulation class, must specify either WIFI_MOD_CLASS_DSSS or WIFI_MOD_CLASS_HR_DSSS!");
353  }
354  uint16_t numberOfBitsPerSubcarrier = static_cast<uint16_t> (log2 (constellationSize));
355  uint64_t dataRate = ((11000000 / divisor) * numberOfBitsPerSubcarrier);
356  return dataRate;
357 }
358 
359 bool
360 DsssPhy::IsModeAllowed (uint16_t /* channelWidth */, uint8_t /* nss */)
361 {
362  return true;
363 }
364 
365 uint32_t
367 {
368  return 4095;
369 }
370 
371 } //namespace ns3
372 
373 namespace {
374 
378 static class ConstructorDsss
379 {
380 public:
382  {
384  ns3::Ptr<ns3::DsssPhy> phyEntity = ns3::Create<ns3::DsssPhy> ();
386  ns3::WifiPhy::AddStaticPhyEntity (ns3::WIFI_MOD_CLASS_DSSS, phyEntity); //use same entity when plain DSSS modes are used
387  }
389 
390 }
WifiModulationClass
This enumeration defines the modulation classes per (Table 10-6 "Modulation classes"; IEEE 802...
double snr
SNR in linear scale.
Definition: phy-entity.h:138
virtual PhyFieldRxStatus DoEndReceiveField(WifiPpduField field, Ptr< Event > event)
End receiving a given field, perform amendment-specific actions, and provide the status of the recept...
Definition: phy-entity.cc:350
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:103
Smart pointer class similar to boost::intrusive_ptr.
Definition: ptr.h:73
#define NS_LOG_FUNCTION(parameters)
If log level LOG_FUNCTION is enabled, this macro will output all input parameters separated by "...
#define NS_ABORT_MSG(msg)
Unconditional abnormal program termination with a message.
Definition: abort.h:50
This class mimics the TXVECTOR which is to be passed to the PHY in order to define the parameters whi...
DsssPhy()
Constructor for HR/DSSS PHY.
Definition: dsss-phy.cc:72
PhyRxFailureAction actionIfFailure
action to perform in case of failure
Definition: phy-entity.h:115
const std::array< uint64_t, 4 > & GetDsssRatesBpsList(void)
Get the array of possible DSSS rates.
Definition: dsss-phy.cc:67
Declaration of ns3::DsssPpdu class.
Callback< R > MakeBoundCallback(R(*fnPtr)(TX), ARG a1)
Make Callbacks with one bound argument.
Definition: callback.h:1703
WifiPhyRxfailureReason reason
failure reason
Definition: phy-entity.h:114
uint16_t GetRxChannelWidth(const WifiTxVector &txVector) const override
Return the channel width used in the reception spectrum model.
Definition: dsss-phy.cc:224
static void InitializeModes(void)
Initialize all HR/DSSS modes.
Definition: dsss-phy.cc:252
static bool IsModeAllowed(uint16_t channelWidth, uint8_t nss)
Check whether the combination of <WifiMode, channel width, NSS> is allowed.
Definition: dsss-phy.cc:360
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:205
#define NS_FATAL_ERROR(msg)
Report a fatal error with a message and terminate.
Definition: fatal-error.h:165
static WifiMode GetDsssRate5_5Mbps(void)
Return a WifiMode for HR/DSSS at 5.5 Mbps.
Time GetDuration(WifiPpduField field, const WifiTxVector &txVector) const override
Get the duration of the PPDU field (or group of fields) used by this entity for the given transmissio...
Definition: dsss-phy.cc:124
static uint16_t GetConstellationSize(const std::string &name)
Return the constellation size from the DSSS or HR/DSSS mode&#39;s unique name using ModulationLookupTable...
Definition: dsss-phy.cc:323
static Ptr< SpectrumValue > CreateDsssTxPowerSpectralDensity(uint32_t centerFrequency, double txPowerW, uint16_t guardBandwidth)
Create a transmit power spectral density corresponding to DSSS.
WifiMode GetHeaderMode(const WifiTxVector &txVector) const
Definition: dsss-phy.cc:102
represent a single transmission modeA WifiMode is implemented by a single integer which is used to lo...
Definition: wifi-mode.h:47
std::map< std::string, CodeRateConstellationSizePair > ModulationLookupTable
A modulation lookup table using unique name of modulation as key.
Definition: phy-entity.h:508
static WifiMode GetDsssRate11Mbps(void)
Return a WifiMode for HR/DSSS at 11 Mbps.
Time GetHeaderDuration(const WifiTxVector &txVector) const
Definition: dsss-phy.cc:157
MpduType
The type of an MPDU.
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...
HR/DSSS (Clause 16)
uint16_t GetChannelWidth(void) const
Definition: wifi-phy.cc:1233
WifiPreamble GetPreambleType(void) const
SYNC + SFD fields for DSSS or ERP, shortSYNC + shortSFD fields for HR/DSSS or ERP, HT-GF-STF + HT-GF-LTF1 fields for HT-GF, L-STF + L-LTF fields otherwise.
PhyFieldRxStatus DoEndReceiveField(WifiPpduField field, Ptr< Event > event) override
End receiving a given field, perform amendment-specific actions, and provide the status of the recept...
Definition: dsss-phy.cc:189
SnrPer GetPhyHeaderSnrPer(WifiPpduField field, Ptr< Event > event) const
Obtain the SNR and PER of the PPDU field from the WifiPhy&#39;s InterferenceHelper class.
Definition: phy-entity.cc:250
Status of the reception of the PPDU field.
Definition: phy-entity.h:110
virtual bool IsConfigSupported(Ptr< const WifiPpdu > ppdu) const
Checks if the signaled configuration (excluding bandwidth) is supported by the PHY.
Definition: phy-entity.cc:901
Time GetPayloadDuration(uint32_t size, const WifiTxVector &txVector, WifiPhyBand band, MpduType mpdutype, bool incFlag, uint32_t &totalAmpduSize, double &totalAmpduNumSymbols, uint16_t staId) const override
Definition: dsss-phy.cc:173
Constructor class for DSSS modes.
Definition: dsss-phy.cc:378
static uint64_t GetDataRate(const std::string &name, WifiModulationClass modClass, uint16_t channelWidth, uint16_t guardInterval, uint8_t nss)
Return the data rate from the DSSS or HR/DSSS mode&#39;s unique name and the supplied parameters...
Definition: dsss-phy.cc:338
WifiPpduField
The type of PPDU field (grouped for convenience)
WifiMode GetSigMode(WifiPpduField field, const WifiTxVector &txVector) const override
Get the WifiMode for the SIG field specified by the PPDU field.
Definition: dsss-phy.cc:89
PhyFieldRxStatus EndReceiveHeader(Ptr< Event > event)
End receiving the header, perform DSSS-specific actions, and provide the status of the reception...
Definition: dsss-phy.cc:200
virtual Time GetDuration(WifiPpduField field, const WifiTxVector &txVector) const
Get the duration of the PPDU field (or group of fields) used by this entity for the given transmissio...
Definition: phy-entity.cc:176
virtual uint64_t ObtainNextUid(const WifiTxVector &txVector)
Obtain the next UID for the PPDU to transmit.
Definition: phy-entity.cc:1021
uint16_t GetCenterFrequencyForChannelWidth(const WifiTxVector &txVector) const
Get the center frequency of the channel corresponding the current TxVector rather than that of the su...
Definition: phy-entity.cc:1028
WifiModulationClass GetModulationClass() const
Definition: wifi-mode.cc:159
#define NS_LOG_LOGIC(msg)
Use NS_LOG to output a message of level LOG_LOGIC.
Definition: log.h:289
std::string GetUniqueName(void) const
Definition: wifi-mode.cc:122
bool isSuccess
outcome (true if success) of the reception
Definition: phy-entity.h:113
A struct for both SNR and PER.
Definition: phy-entity.h:136
const PpduFormats & GetPpduFormats(void) const override
Return the PPDU formats of the PHY.
Definition: dsss-phy.cc:118
virtual uint16_t GetRxChannelWidth(const WifiTxVector &txVector) const
Return the channel width used in the reception spectrum model.
Definition: phy-entity.cc:1015
uint16_t WifiCodeRate
These constants define the various convolutional coding rates used for the OFDM transmission modes in...
static WifiMode CreateWifiMode(std::string uniqueName, WifiModulationClass modClass, bool isMandatory, CodeRateCallback codeRateCallback, ConstellationSizeCallback constellationSizeCallback, PhyRateCallback phyRateCallback, PhyRateFromTxVectorCallback phyRateFromTxVectorCallback, DataRateCallback dataRateCallback, DataRateFromTxVectorCallback dataRateFromTxVectorCallback, ModeAllowedCallback isModeAllowedCallback)
Definition: wifi-mode.cc:242
abort reception of PPDU
Definition: phy-entity.h:103
virtual WifiMode GetSigMode(WifiPpduField field, const WifiTxVector &txVector) const
Get the WifiMode for the SIG field specified by the PPDU field.
Definition: phy-entity.cc:141
Every class exported by the ns3 library is enclosed in the ns3 namespace.
Ptr< SpectrumValue > GetTxPowerSpectralDensity(double txPowerW, Ptr< const WifiPpdu > ppdu) const override
Definition: dsss-phy.cc:240
static const std::array< uint64_t, 4 > s_dsssRatesBpsList
DSSS rates in bits per second.
Definition: dsss-phy.cc:60
static void AddStaticPhyEntity(WifiModulationClass modulation, Ptr< PhyEntity > phyEntity)
Add the PHY entity to the map of implemented PHY entities for the given modulation class...
Definition: wifi-phy.cc:886
static WifiMode GetDsssRate(uint64_t rate)
Return a WifiMode for HR/DSSS corresponding to the provided rate.
Definition: dsss-phy.cc:261
drop PPDU and set CCA_BUSY
Definition: phy-entity.h:102
Time GetPreambleDuration(const WifiTxVector &txVector) const
Definition: dsss-phy.cc:141
static WifiCodeRate GetCodeRate(const std::string &name)
Return the WifiCodeRate from the DSSS or HR/DSSS mode&#39;s unique name using ModulationLookupTable.
Definition: dsss-phy.cc:317
double RatioToDb(double ratio)
Convert from ratio to dB.
Definition: wifi-utils.cc:53
static const ModulationLookupTable m_dsssModulationLookupTable
lookup table to retrieve code rate and constellation size corresponding to a unique name of modulatio...
Definition: dsss-phy.h:203
#define NS_ASSERT_MSG(condition, message)
At runtime, in debugging builds, if this condition is not true, the program prints the message to out...
Definition: assert.h:88
WifiPhyBand
Identifies the PHY band.
Definition: wifi-phy-band.h:32
static uint64_t GetDataRateFromTxVector(const WifiTxVector &txVector, uint16_t staId)
Return the data rate corresponding to the supplied TXVECTOR.
Definition: dsss-phy.cc:329
static WifiMode GetDsssRate1Mbps(void)
Return a WifiMode for DSSS at 1 Mbps.
#define NS_ABORT_MSG_IF(cond, msg)
Abnormal program termination if a condition is true, with a message.
Definition: abort.h:108
static WifiMode CreateDsssMode(std::string uniqueName, WifiModulationClass modClass)
Create a DSSS or HR/DSSS mode from a unique name, the unique name must already be contained inside Mo...
Definition: dsss-phy.cc:296
std::map< WifiPreamble, std::vector< WifiPpduField > > PpduFormats
A map of PPDU field elements per preamble type.
Definition: phy-entity.h:498
#define NS_LOG_DEBUG(msg)
Use NS_LOG to output a message of level LOG_DEBUG.
Definition: log.h:273
const uint16_t WIFI_CODE_RATE_UNDEFINED
undefined coding rate
double GetRandomValue(void) const
Obtain a random value from the WifiPhy&#39;s generator.
Definition: phy-entity.cc:991
static const PpduFormats m_dsssPpduFormats
DSSS and HR/DSSS PPDU formats.
Definition: dsss-phy.h:201
#define GET_DSSS_MODE(x, m)
Definition: dsss-phy.cc:279
Time MicroSeconds(uint64_t value)
Construct a Time in the indicated unit.
Definition: nstime.h:1305
uint16_t GetChannelWidth(void) const
uint32_t GetMaxPsduSize(void) const override
Get the maximum PSDU size in bytes.
Definition: dsss-phy.cc:366
static class anonymous_namespace{dsss-phy.cc}::ConstructorDsss g_constructor_dsss
the constructor for DSSS modes
PHY header field for DSSS or ERP, short PHY header field for HR/DSSS or ERP, field not present for HT...
Declaration of ns3::DsssPhy class.
static WifiMode GetDsssRate2Mbps(void)
Return a WifiMode for DSSS at 2 Mbps.
virtual ~DsssPhy()
Destructor for HR/DSSS PHY.
Definition: dsss-phy.cc:83
std::unordered_map< uint16_t, Ptr< const WifiPsdu > > WifiConstPsduMap
Map of const PSDUs indexed by STA-ID.
Callback< R, Ts... > MakeCallback(R(T::*memPtr)(Ts...), OBJ objPtr)
Build Callbacks for class method members which take varying numbers of arguments and potentially retu...
Definition: callback.h:1642
uint64_t GetDataRate(uint16_t channelWidth, uint16_t guardInterval, uint8_t nss) const
Definition: wifi-mode.cc:100
std::list< WifiMode > m_modeList
the list of supported modes
Definition: phy-entity.h:807
Ptr< WifiPhy > m_wifiPhy
Pointer to the owning WifiPhy.
Definition: phy-entity.h:804
uint16_t GetGuardBandwidth(uint16_t currentChannelWidth) const
Definition: phy-entity.cc:1061
Ptr< WifiPpdu > BuildPpdu(const WifiConstPsduMap &psdus, const WifiTxVector &txVector, Time ppduDuration) override
Build amendment-specific PPDU.
Definition: dsss-phy.cc:181