--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/wifi/test/tx-duration-test.cc Mon May 09 22:03:43 2011 +0200
@@ -0,0 +1,196 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2009 CTTC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Nicola Baldo <nbaldo@cttc.es>
+ */
+
+#include <ns3/object.h>
+#include <ns3/log.h>
+#include <ns3/test.h>
+#include <iostream>
+#include "ns3/interference-helper.h"
+#include "ns3/wifi-phy.h"
+
+NS_LOG_COMPONENT_DEFINE ("InterferenceHelperTxDurationTest");
+
+namespace ns3 {
+
+class TxDurationTest : public TestCase
+{
+public:
+ TxDurationTest ();
+ virtual ~TxDurationTest ();
+ virtual void DoRun (void);
+
+private:
+ /**
+ * Check if the payload tx duration returned by InterferenceHelper
+ * corresponds to a known value of the pay
+ *
+ * @param size size of payload in octets (includes everything after the PLCP header)
+ * @param payloadMode the WifiMode used
+ * @param knownPlcpLengthFieldValue the known value of the Length field in the PLCP header
+ *
+ * @return true if values correspond, false otherwise
+ */
+ bool CheckPayloadDuration (uint32_t size, WifiMode payloadMode, uint32_t knownDurationMicroSeconds);
+
+ /**
+ * Check if the overall tx duration returned by InterferenceHelper
+ * corresponds to a known value of the pay
+ *
+ * @param size size of payload in octets (includes everything after the PLCP header)
+ * @param payloadMode the WifiMode used
+ * @param preamble the WifiPreamble used
+ * @param knownPlcpLengthFieldValue the known value of the Length field in the PLCP header
+ *
+ * @return true if values correspond, false otherwise
+ */
+ bool CheckTxDuration (uint32_t size, WifiMode payloadMode, WifiPreamble preamble, uint32_t knownDurationMicroSeconds);
+
+};
+
+
+TxDurationTest::TxDurationTest ()
+ : TestCase ("Wifi TX Duration")
+{
+}
+
+
+TxDurationTest::~TxDurationTest ()
+{
+}
+
+bool
+TxDurationTest::CheckPayloadDuration (uint32_t size, WifiMode payloadMode, uint32_t knownDurationMicroSeconds)
+{
+ uint32_t calculatedDurationMicroSeconds = WifiPhy::GetPayloadDurationMicroSeconds (size, payloadMode);
+ if (calculatedDurationMicroSeconds != knownDurationMicroSeconds)
+ {
+ std::cerr << " size=" << size
+ << " mode=" << payloadMode
+ << " known=" << knownDurationMicroSeconds
+ << " calculated=" << calculatedDurationMicroSeconds
+ << std::endl;
+ return false;
+ }
+ return true;
+}
+
+bool
+TxDurationTest::CheckTxDuration (uint32_t size, WifiMode payloadMode, WifiPreamble preamble, uint32_t knownDurationMicroSeconds)
+{
+ uint32_t calculatedDurationMicroSeconds = WifiPhy::CalculateTxDuration (size, payloadMode, preamble).GetMicroSeconds ();
+ if (calculatedDurationMicroSeconds != knownDurationMicroSeconds)
+ {
+ std::cerr << " size=" << size
+ << " mode=" << payloadMode
+ << " preamble=" << preamble
+ << " known=" << knownDurationMicroSeconds
+ << " calculated=" << calculatedDurationMicroSeconds
+ << std::endl;
+ return false;
+ }
+ return true;
+}
+
+void
+TxDurationTest::DoRun (void)
+{
+ bool retval = true;
+
+ // IEEE Std 802.11-2007 Table 18-2 "Example of LENGTH calculations for CCK"
+ retval = retval
+ && CheckPayloadDuration (1023, WifiPhy::GetDsssRate11Mbps (), 744)
+ && CheckPayloadDuration (1024, WifiPhy::GetDsssRate11Mbps (), 745)
+ && CheckPayloadDuration (1025, WifiPhy::GetDsssRate11Mbps (), 746)
+ && CheckPayloadDuration (1026, WifiPhy::GetDsssRate11Mbps (), 747);
+
+
+ // Similar, but we add PLCP preamble and header durations
+ // and we test different rates.
+ // The payload durations for modes other than 11mbb have been
+ // calculated by hand according to IEEE Std 802.11-2007 18.2.3.5
+ retval = retval
+ && CheckTxDuration (1023, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_SHORT, 744 + 96)
+ && CheckTxDuration (1024, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_SHORT, 745 + 96)
+ && CheckTxDuration (1025, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_SHORT, 746 + 96)
+ && CheckTxDuration (1026, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_SHORT, 747 + 96)
+ && CheckTxDuration (1023, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 744 + 192)
+ && CheckTxDuration (1024, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 745 + 192)
+ && CheckTxDuration (1025, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 746 + 192)
+ && CheckTxDuration (1026, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 747 + 192)
+ && CheckTxDuration (1023, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_SHORT, 1488 + 96)
+ && CheckTxDuration (1024, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_SHORT, 1490 + 96)
+ && CheckTxDuration (1025, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_SHORT, 1491 + 96)
+ && CheckTxDuration (1026, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_SHORT, 1493 + 96)
+ && CheckTxDuration (1023, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_LONG, 1488 + 192)
+ && CheckTxDuration (1024, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_LONG, 1490 + 192)
+ && CheckTxDuration (1025, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_LONG, 1491 + 192)
+ && CheckTxDuration (1026, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_LONG, 1493 + 192)
+ && CheckTxDuration (1023, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_SHORT, 4092 + 96)
+ && CheckTxDuration (1024, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_SHORT, 4096 + 96)
+ && CheckTxDuration (1025, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_SHORT, 4100 + 96)
+ && CheckTxDuration (1026, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_SHORT, 4104 + 96)
+ && CheckTxDuration (1023, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_LONG, 4092 + 192)
+ && CheckTxDuration (1024, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_LONG, 4096 + 192)
+ && CheckTxDuration (1025, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_LONG, 4100 + 192)
+ && CheckTxDuration (1026, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_LONG, 4104 + 192)
+ && CheckTxDuration (1023, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_SHORT, 8184 + 96)
+ && CheckTxDuration (1024, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_SHORT, 8192 + 96)
+ && CheckTxDuration (1025, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_SHORT, 8200 + 96)
+ && CheckTxDuration (1026, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_SHORT, 8208 + 96)
+ && CheckTxDuration (1023, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 8184 + 192)
+ && CheckTxDuration (1024, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 8192 + 192)
+ && CheckTxDuration (1025, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 8200 + 192)
+ && CheckTxDuration (1026, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 8208 + 192);
+
+ // values from http://mailman.isi.edu/pipermail/ns-developers/2009-July/006226.html
+ retval = retval && CheckTxDuration (14, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 304);
+
+ // values from
+ // http://www.oreillynet.com/pub/a/wireless/2003/08/08/wireless_throughput.html
+ retval = retval
+ && CheckTxDuration (1536, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 1310)
+ && CheckTxDuration (76, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 248)
+ && CheckTxDuration (14, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 203)
+ && CheckTxDuration (1536, WifiPhy::GetOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 248)
+ && CheckTxDuration (76, WifiPhy::GetOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 32)
+ && CheckTxDuration (14, WifiPhy::GetOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 24);
+
+ // 802.11g durations are same as 802.11a durations but with 6 us signal extension
+ retval = retval
+ && CheckTxDuration (1536, WifiPhy::GetErpOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 254)
+ && CheckTxDuration (76, WifiPhy::GetErpOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 38)
+ && CheckTxDuration (14, WifiPhy::GetErpOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 30);
+}
+
+class TxDurationTestSuite : public TestSuite
+{
+public:
+ TxDurationTestSuite ();
+};
+
+TxDurationTestSuite::TxDurationTestSuite ()
+ : TestSuite ("devices-wifi-tx-duration", UNIT)
+{
+ AddTestCase (new TxDurationTest);
+}
+
+static TxDurationTestSuite g_txDurationTestSuite;
+} //namespace ns3
+