author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Tue, 04 Nov 2008 14:06:34 +0100 | |
changeset 3912 | 4d1a61f80745 |
parent 3906 | 01acc159ffb1 |
child 4039 | 50a070c2750c |
permissions | -rw-r--r-- |
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#include "interference-helper.h" |
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#include "wifi-phy.h" |
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#include "error-rate-model.h" |
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#include "ns3/simulator.h" |
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#include "ns3/log.h" |
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#include <algorithm> |
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NS_LOG_COMPONENT_DEFINE ("InterferenceHelper"); |
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namespace ns3 { |
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/**************************************************************** |
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* Phy event class |
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****************************************************************/ |
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InterferenceHelper::Event::Event (uint32_t size, WifiMode payloadMode, |
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enum WifiPreamble preamble, |
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Time duration, double rxPower) |
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: m_size (size), |
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m_payloadMode (payloadMode), |
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m_preamble (preamble), |
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m_startTime (Simulator::Now ()), |
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m_endTime (m_startTime + duration), |
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m_rxPowerW (rxPower) |
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{} |
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InterferenceHelper::Event::~Event () |
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{} |
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|
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Time |
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InterferenceHelper::Event::GetDuration (void) const |
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{ |
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return m_endTime - m_startTime; |
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} |
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Time |
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InterferenceHelper::Event::GetStartTime (void) const |
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{ |
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return m_startTime; |
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} |
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Time |
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InterferenceHelper::Event::GetEndTime (void) const |
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{ |
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return m_endTime; |
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} |
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bool |
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InterferenceHelper::Event::Overlaps (Time time) const |
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{ |
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if (m_startTime <= time && |
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m_endTime >= time) |
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{ |
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return true; |
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} |
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else |
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{ |
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return false; |
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} |
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} |
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double |
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InterferenceHelper::Event::GetRxPowerW (void) const |
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{ |
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return m_rxPowerW; |
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} |
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uint32_t |
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InterferenceHelper::Event::GetSize (void) const |
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{ |
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return m_size; |
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} |
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WifiMode |
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InterferenceHelper::Event::GetPayloadMode (void) const |
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{ |
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return m_payloadMode; |
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} |
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enum WifiPreamble |
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InterferenceHelper::Event::GetPreambleType (void) const |
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{ |
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return m_preamble; |
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} |
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|
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/**************************************************************** |
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* Class which records SNIR change events for a |
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* short period of time. |
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****************************************************************/ |
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|
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InterferenceHelper::NiChange::NiChange (Time time, double delta) |
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: m_time (time), m_delta (delta) |
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{} |
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Time |
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InterferenceHelper::NiChange::GetTime (void) const |
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{ |
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return m_time; |
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} |
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double |
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InterferenceHelper::NiChange::GetDelta (void) const |
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{ |
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return m_delta; |
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} |
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bool |
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InterferenceHelper::NiChange::operator < (InterferenceHelper::NiChange const &o) const |
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{ |
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return (m_time < o.m_time)?true:false; |
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} |
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|
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/**************************************************************** |
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* The actual InterferenceHelper |
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****************************************************************/ |
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105 |
|
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106 |
InterferenceHelper::InterferenceHelper () |
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: m_80211a (false), |
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m_errorRateModel (0) |
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109 |
{} |
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InterferenceHelper::~InterferenceHelper () |
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111 |
{ |
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m_errorRateModel = 0; |
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113 |
} |
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114 |
|
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115 |
Ptr<InterferenceHelper::Event> |
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InterferenceHelper::Add (uint32_t size, WifiMode payloadMode, |
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117 |
enum WifiPreamble preamble, |
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118 |
Time duration, double rxPowerW) |
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119 |
{ |
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Ptr<InterferenceHelper::Event> event; |
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121 |
|
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event = Create<InterferenceHelper::Event> |
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123 |
(size, |
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124 |
payloadMode, |
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125 |
preamble, |
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126 |
duration, |
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127 |
rxPowerW); |
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128 |
|
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AppendEvent (event); |
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return event; |
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131 |
} |
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132 |
|
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133 |
Time |
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InterferenceHelper::GetMaxPacketDuration (void) const |
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135 |
{ |
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return m_maxPacketDuration; |
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137 |
} |
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138 |
|
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139 |
void |
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140 |
InterferenceHelper::SetNoiseFloorW (double noiseFloor) |
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141 |
{ |
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m_noiseFloorW = noiseFloor; |
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143 |
} |
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144 |
|
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145 |
double |
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146 |
InterferenceHelper::GetNoiseFloorW (void) const |
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147 |
{ |
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148 |
return m_noiseFloorW; |
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149 |
} |
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150 |
|
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151 |
void |
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152 |
InterferenceHelper::SetErrorRateModel (Ptr<ErrorRateModel> rate) |
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153 |
{ |
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154 |
m_errorRateModel = rate; |
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155 |
} |
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156 |
|
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157 |
Ptr<ErrorRateModel> |
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158 |
InterferenceHelper::GetErrorRateModel (void) const |
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159 |
{ |
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160 |
return m_errorRateModel; |
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161 |
} |
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162 |
|
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163 |
Time |
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164 |
InterferenceHelper::GetEnergyDuration (double energyW) |
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165 |
{ |
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166 |
Time now = Simulator::Now (); |
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167 |
|
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168 |
// first, we iterate over all events and, each event |
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169 |
// which contributes energy to the channel now is |
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170 |
// appended to the noise interference array. |
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171 |
Events::const_iterator i = m_events.begin (); |
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172 |
double noiseInterferenceW = 0.0; |
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173 |
NiChanges ni; |
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174 |
while (i != m_events.end ()) |
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175 |
{ |
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176 |
Ptr<Event> ev = *i; |
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177 |
NS_ASSERT (ev->GetStartTime () <= now); |
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178 |
if (ev->GetEndTime () > now) |
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|
179 |
{ |
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180 |
ni.push_back (NiChange (ev->GetEndTime (), -ev->GetRxPowerW ())); |
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181 |
noiseInterferenceW += ev->GetRxPowerW (); |
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182 |
} |
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183 |
i++; |
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184 |
} |
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185 |
if (noiseInterferenceW < energyW) |
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|
186 |
{ |
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187 |
return MicroSeconds (0); |
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188 |
} |
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|
189 |
|
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190 |
/* quicksort vector of NI changes by time. |
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191 |
*/ |
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192 |
std::sort (ni.begin (), ni.end (), std::less<NiChange> ()); |
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|
193 |
|
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194 |
// Now, we iterate the piecewise linear noise function |
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195 |
Time end = now; |
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196 |
for (NiChanges::const_iterator i = ni.begin (); i != ni.end (); i++) |
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197 |
{ |
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198 |
noiseInterferenceW += i->GetDelta (); |
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199 |
end = i->GetTime (); |
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200 |
if (noiseInterferenceW < energyW) |
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201 |
{ |
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202 |
break; |
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203 |
} |
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204 |
} |
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205 |
return end - now; |
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206 |
} |
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|
207 |
|
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208 |
Time |
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209 |
InterferenceHelper::CalculateTxDuration (uint32_t size, WifiMode payloadMode, WifiPreamble preamble) const |
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210 |
{ |
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211 |
NS_ASSERT (m_80211a); |
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212 |
uint64_t delay = 0; |
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delay += m_plcpLongPreambleDelayUs; |
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214 |
// symbol duration is 4us |
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215 |
delay += 4; |
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delay += lrint (ceil ((size * 8.0 + 16.0 + 6.0) / payloadMode.GetDataRate () / 4e-6) * 4); |
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return MicroSeconds (delay); |
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218 |
} |
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219 |
|
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220 |
void |
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221 |
InterferenceHelper::Configure80211aParameters (void) |
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222 |
{ |
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223 |
NS_LOG_FUNCTION (this); |
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224 |
m_80211a = true; |
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m_plcpLongPreambleDelayUs = 16; |
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226 |
m_plcpShortPreambleDelayUs = 16; |
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m_longPlcpHeaderMode = WifiPhy::g_6mba; |
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m_shortPlcpHeaderMode = WifiPhy::g_6mba; |
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m_plcpHeaderLength = 4 + 1 + 12 + 1 + 6; |
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230 |
/* 4095 bytes at a 6Mb/s rate with a 1/2 coding rate. */ |
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231 |
m_maxPacketDuration = CalculateTxDuration (4095, WifiPhy::g_6mba, WIFI_PREAMBLE_LONG); |
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232 |
} |
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233 |
|
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234 |
void |
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235 |
InterferenceHelper::AppendEvent (Ptr<InterferenceHelper::Event> event) |
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236 |
{ |
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237 |
/* attempt to remove the events which are |
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238 |
* not useful anymore. |
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239 |
* i.e.: all events which end _before_ |
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240 |
* now - m_maxPacketDuration |
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241 |
*/ |
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242 |
|
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243 |
if (Simulator::Now () > GetMaxPacketDuration ()) |
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244 |
{ |
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245 |
Time end = Simulator::Now () - GetMaxPacketDuration (); |
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246 |
Events::iterator i = m_events.begin (); |
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247 |
while (i != m_events.end () && |
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248 |
(*i)->GetEndTime () <= end) |
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249 |
{ |
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250 |
i++; |
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251 |
} |
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252 |
m_events.erase (m_events.begin (), i); |
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253 |
} |
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254 |
m_events.push_back (event); |
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255 |
} |
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|
256 |
|
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257 |
|
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258 |
double |
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259 |
InterferenceHelper::CalculateSnr (double signal, double noiseInterference, WifiMode mode) const |
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260 |
{ |
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261 |
// thermal noise at 290K in J/s = W |
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262 |
static const double BOLTZMANN = 1.3803e-23; |
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263 |
double Nt = BOLTZMANN * 290.0 * mode.GetBandwidth (); |
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264 |
// receiver noise Floor (W) |
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265 |
double noiseFloor = m_noiseFloorW * Nt; |
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266 |
double noise = noiseFloor + noiseInterference; |
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267 |
double snr = signal / noise; |
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268 |
return snr; |
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269 |
} |
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|
270 |
|
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271 |
double |
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272 |
InterferenceHelper::CalculateNoiseInterferenceW (Ptr<InterferenceHelper::Event> event, NiChanges *ni) const |
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273 |
{ |
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274 |
Events::const_iterator i = m_events.begin (); |
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275 |
double noiseInterference = 0.0; |
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276 |
while (i != m_events.end ()) |
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277 |
{ |
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278 |
if (event == (*i)) |
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279 |
{ |
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|
280 |
i++; |
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281 |
continue; |
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282 |
} |
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283 |
if (event->Overlaps ((*i)->GetStartTime ())) |
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|
284 |
{ |
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285 |
ni->push_back (NiChange ((*i)->GetStartTime (), (*i)->GetRxPowerW ())); |
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286 |
} |
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287 |
if (event->Overlaps ((*i)->GetEndTime ())) |
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|
288 |
{ |
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289 |
ni->push_back (NiChange ((*i)->GetEndTime (), -(*i)->GetRxPowerW ())); |
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290 |
} |
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291 |
if ((*i)->Overlaps (event->GetStartTime ())) |
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|
292 |
{ |
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293 |
noiseInterference += (*i)->GetRxPowerW (); |
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294 |
} |
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295 |
i++; |
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296 |
} |
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297 |
ni->push_back (NiChange (event->GetStartTime (), noiseInterference)); |
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298 |
ni->push_back (NiChange (event->GetEndTime (), 0)); |
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|
299 |
|
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300 |
/* quicksort vector of NI changes by time. */ |
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301 |
std::sort (ni->begin (), ni->end (), std::less<NiChange> ()); |
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302 |
|
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303 |
return noiseInterference; |
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304 |
} |
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|
305 |
|
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306 |
double |
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307 |
InterferenceHelper::CalculateChunkSuccessRate (double snir, Time duration, WifiMode mode) const |
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|
308 |
{ |
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|
309 |
if (duration == NanoSeconds (0)) { |
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310 |
return 1.0; |
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311 |
} |
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312 |
uint32_t rate = mode.GetPhyRate (); |
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|
313 |
uint64_t nbits = (uint64_t)(rate * duration.GetSeconds ()); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
314 |
double csr = m_errorRateModel->GetChunkSuccessRate (mode, snir, (uint32_t)nbits); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
315 |
return csr; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
316 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
317 |
|
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
318 |
double |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
319 |
InterferenceHelper::CalculatePer (Ptr<const InterferenceHelper::Event> event, NiChanges *ni) const |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
320 |
{ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
321 |
double psr = 1.0; /* Packet Success Rate */ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
322 |
NiChanges::iterator j = ni->begin (); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
323 |
Time previous = (*j).GetTime (); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
324 |
uint64_t plcpPreambleDelayUs; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
325 |
WifiMode payloadMode = event->GetPayloadMode (); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
326 |
WifiMode headerMode; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
327 |
switch (event->GetPreambleType ()) { |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
328 |
case WIFI_PREAMBLE_LONG: |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
329 |
plcpPreambleDelayUs = m_plcpLongPreambleDelayUs; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
330 |
headerMode = m_longPlcpHeaderMode; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
331 |
break; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
332 |
case WIFI_PREAMBLE_SHORT: |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
333 |
plcpPreambleDelayUs = m_plcpShortPreambleDelayUs; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
334 |
headerMode = m_shortPlcpHeaderMode; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
335 |
break; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
336 |
default: |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
337 |
NS_ASSERT (false); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
338 |
// only to quiet compiler. Really stupid. |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
339 |
plcpPreambleDelayUs = 0; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
340 |
headerMode = m_shortPlcpHeaderMode; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
341 |
break; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
342 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
343 |
Time plcpHeaderStart = (*j).GetTime () + MicroSeconds (plcpPreambleDelayUs); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
344 |
Time plcpPayloadStart = plcpHeaderStart + |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
345 |
Seconds ((m_plcpHeaderLength + 0.0) / headerMode.GetDataRate ()); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
346 |
double noiseInterferenceW = (*j).GetDelta (); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
347 |
double powerW = event->GetRxPowerW (); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
348 |
|
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
349 |
j++; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
350 |
while (ni->end () != j) |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
351 |
{ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
352 |
Time current = (*j).GetTime (); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
353 |
NS_ASSERT (current >= previous); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
354 |
|
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
355 |
if (previous >= plcpPayloadStart) |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
356 |
{ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
357 |
psr *= CalculateChunkSuccessRate (CalculateSnr (powerW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
358 |
noiseInterferenceW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
359 |
payloadMode), |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
360 |
current - previous, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
361 |
payloadMode); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
362 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
363 |
else if (previous >= plcpHeaderStart) |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
364 |
{ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
365 |
if (current >= plcpPayloadStart) |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
366 |
{ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
367 |
psr *= CalculateChunkSuccessRate (CalculateSnr (powerW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
368 |
noiseInterferenceW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
369 |
headerMode), |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
370 |
plcpPayloadStart - previous, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
371 |
headerMode); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
372 |
psr *= CalculateChunkSuccessRate (CalculateSnr (powerW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
373 |
noiseInterferenceW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
374 |
payloadMode), |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
375 |
current - plcpPayloadStart, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
376 |
payloadMode); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
377 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
378 |
else |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
379 |
{ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
380 |
NS_ASSERT (current >= plcpHeaderStart); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
381 |
psr *= CalculateChunkSuccessRate (CalculateSnr (powerW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
382 |
noiseInterferenceW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
383 |
headerMode), |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
384 |
current - previous, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
385 |
headerMode); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
386 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
387 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
388 |
else |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
389 |
{ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
390 |
if (current >= plcpPayloadStart) |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
391 |
{ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
392 |
psr *= CalculateChunkSuccessRate (CalculateSnr (powerW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
393 |
noiseInterferenceW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
394 |
headerMode), |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
395 |
plcpPayloadStart - plcpHeaderStart, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
396 |
headerMode); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
397 |
psr *= CalculateChunkSuccessRate (CalculateSnr (powerW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
398 |
noiseInterferenceW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
399 |
payloadMode), |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
400 |
current - plcpPayloadStart, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
401 |
payloadMode); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
402 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
403 |
else if (current >= plcpHeaderStart) |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
404 |
{ |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
405 |
psr *= CalculateChunkSuccessRate (CalculateSnr (powerW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
406 |
noiseInterferenceW, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
407 |
headerMode), |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
408 |
current - plcpHeaderStart, |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
409 |
headerMode); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
410 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
411 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
412 |
|
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
413 |
noiseInterferenceW += (*j).GetDelta (); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
414 |
previous = (*j).GetTime (); |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
415 |
j++; |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff
changeset
|
416 |
} |
99c9346b5d71
split interference calculation from YansWifiPhy. Move them to InterferenceHelper
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double per = 1 - psr; |
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return per; |
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} |
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421 |
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422 |
|
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423 |
struct InterferenceHelper::SnrPer |
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InterferenceHelper::CalculateSnrPer (Ptr<InterferenceHelper::Event> event) |
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425 |
{ |
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426 |
NiChanges ni; |
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double noiseInterferenceW = CalculateNoiseInterferenceW (event, &ni); |
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double snr = CalculateSnr (event->GetRxPowerW (), |
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noiseInterferenceW, |
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event->GetPayloadMode ()); |
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431 |
|
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/* calculate the SNIR at the start of the packet and accumulate |
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* all SNIR changes in the snir vector. |
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*/ |
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double per = CalculatePer (event, &ni); |
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436 |
|
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437 |
struct SnrPer snrPer; |
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438 |
snrPer.snr = snr; |
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snrPer.per = per; |
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return snrPer; |
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} |
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442 |
|
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|
443 |
|
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444 |
|
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445 |
} // namespace ns3 |