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28 #include "ns3/log.h" |
28 #include "ns3/log.h" |
29 #include "ns3/double.h" |
29 #include "ns3/double.h" |
30 #include "ns3/uinteger.h" |
30 #include "ns3/uinteger.h" |
31 #include "ns3/enum.h" |
31 #include "ns3/enum.h" |
32 #include "ns3/trace-source-accessor.h" |
32 #include "ns3/trace-source-accessor.h" |
33 #include <math.h> |
33 #include <cmath> |
34 |
34 |
35 NS_LOG_COMPONENT_DEFINE ("WifiPhy"); |
35 NS_LOG_COMPONENT_DEFINE ("WifiPhy"); |
36 |
36 |
37 namespace ns3 { |
37 namespace ns3 { |
38 |
38 |
262 // IEEE Std 802.11-2007, section 17.3.2.2, table 17-3 |
262 // IEEE Std 802.11-2007, section 17.3.2.2, table 17-3 |
263 // corresponds to N_{DBPS} in the table |
263 // corresponds to N_{DBPS} in the table |
264 double numDataBitsPerSymbol = payloadMode.GetDataRate () * symbolDurationUs / 1e6; |
264 double numDataBitsPerSymbol = payloadMode.GetDataRate () * symbolDurationUs / 1e6; |
265 |
265 |
266 // IEEE Std 802.11-2007, section 17.3.5.3, equation (17-11) |
266 // IEEE Std 802.11-2007, section 17.3.5.3, equation (17-11) |
267 uint32_t numSymbols = lrint (ceil ((16 + size * 8.0 + 6.0) / numDataBitsPerSymbol)); |
267 uint32_t numSymbols = lrint (std::ceil ((16 + size * 8.0 + 6.0) / numDataBitsPerSymbol)); |
268 |
268 |
269 // Add signal extension for ERP PHY |
269 // Add signal extension for ERP PHY |
270 if (payloadMode.GetModulationClass () == WIFI_MOD_CLASS_ERP_OFDM) |
270 if (payloadMode.GetModulationClass () == WIFI_MOD_CLASS_ERP_OFDM) |
271 { |
271 { |
272 return numSymbols * symbolDurationUs + 6; |
272 return numSymbols * symbolDurationUs + 6; |
280 case WIFI_MOD_CLASS_DSSS: |
280 case WIFI_MOD_CLASS_DSSS: |
281 // IEEE Std 802.11-2007, section 18.2.3.5 |
281 // IEEE Std 802.11-2007, section 18.2.3.5 |
282 NS_LOG_LOGIC (" size=" << size |
282 NS_LOG_LOGIC (" size=" << size |
283 << " mode=" << payloadMode |
283 << " mode=" << payloadMode |
284 << " rate=" << payloadMode.GetDataRate () ); |
284 << " rate=" << payloadMode.GetDataRate () ); |
285 return lrint (ceil ((size * 8.0) / (payloadMode.GetDataRate () / 1.0e6))); |
285 return lrint (std::ceil ((size * 8.0) / (payloadMode.GetDataRate () / 1.0e6))); |
286 |
286 |
287 default: |
287 default: |
288 NS_FATAL_ERROR ("unsupported modulation class"); |
288 NS_FATAL_ERROR ("unsupported modulation class"); |
289 return 0; |
289 return 0; |
290 } |
290 } |