--- a/src/devices/wifi/amrr-mac-stations.cc Mon Mar 03 04:03:39 2008 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,280 +0,0 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
-/*
- * Copyright (c) 2003,2007 INRIA
- *
- * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
- */
-
-#include "amrr-mac-stations.h"
-#include "ns3/default-value.h"
-#include "ns3/time-default-value.h"
-#include "ns3/simulator.h"
-#include "ns3/log.h"
-
-NS_LOG_COMPONENT_DEFINE ("AmrrMacStation");
-
-namespace ns3 {
-
-static TimeDefaultValue g_updatePeriod
-("WifiAmrrUpdatePeriod",
- "The interval between decisions about rate control changes",
- Seconds (1.0));
-static NumericDefaultValue<double> g_failureRatio
-("WifiAmrrFailureRatio",
- "Ratio of erronous transmissions needed to switch to a lower rate",
- 1.0/3.0);
-static NumericDefaultValue<double> g_successRatio
-("WifiAmrrSuccessRatio",
- "Ratio of erronous transmissions needed to switch to a higher rate",
- 1.0/10.0);
-static NumericDefaultValue<uint32_t> g_maxSuccessThreshold
-("WifiAmrrMaxSuccessThreshold",
- "maximum number of consecutive success periods needed to switch to a higher rate",
- 10);
-static NumericDefaultValue<uint32_t> g_minSuccessThreshold
-("WifiAmrrMinSuccessThreshold",
- "minimum number of consecutive success periods needed to switch to a higher rate",
- 1);
-
-AmrrMacStations::AmrrMacStations (WifiMode defaultTxMode)
- : MacStations (defaultTxMode),
- m_updatePeriod (g_updatePeriod.GetValue ()),
- m_failureRatio (g_failureRatio.GetValue ()),
- m_successRatio (g_successRatio.GetValue ()),
- m_maxSuccessThreshold (g_maxSuccessThreshold.GetValue ()),
- m_minSuccessThreshold (g_minSuccessThreshold.GetValue ())
-{}
-MacStation *
-AmrrMacStations::CreateStation (void)
-{
- return new AmrrMacStation (this);
-}
-
-AmrrMacStation::AmrrMacStation (AmrrMacStations *stations)
- : m_stations (stations),
- m_nextModeUpdate (Simulator::Now () + stations->m_updatePeriod),
- m_tx_ok (0),
- m_tx_err (0),
- m_tx_retr (0),
- m_retry (0),
- m_txrate (0),
- m_successThreshold (m_stations->m_minSuccessThreshold),
- m_success (0),
- m_recovery (false)
-{}
-AmrrMacStation::~AmrrMacStation ()
-{}
-
-void
-AmrrMacStation::ReportRxOk (double rxSnr, WifiMode txMode)
-{}
-void
-AmrrMacStation::ReportRtsFailed (void)
-{}
-void
-AmrrMacStation::ReportDataFailed (void)
-{
- m_retry++;
- m_tx_retr++;
-}
-void
-AmrrMacStation::ReportRtsOk (double ctsSnr, WifiMode ctsMode, double rtsSnr)
-{}
-void
-AmrrMacStation::ReportDataOk (double ackSnr, WifiMode ackMode, double dataSnr)
-{
- m_retry = 0;
- m_tx_ok++;
-}
-void
-AmrrMacStation::ReportFinalRtsFailed (void)
-{}
-void
-AmrrMacStation::ReportFinalDataFailed (void)
-{
- m_retry = 0;
- m_tx_err++;
-}
-bool
-AmrrMacStation::IsMinRate (void) const
-{
- return (m_txrate == 0);
-}
-bool
-AmrrMacStation::IsMaxRate (void) const
-{
- NS_ASSERT (m_txrate + 1 <= GetNSupportedModes ());
- return (m_txrate + 1 == GetNSupportedModes ());
-}
-bool
-AmrrMacStation::IsSuccess (void) const
-{
- return (m_tx_retr + m_tx_err) < m_tx_ok * m_stations->m_successRatio;
-}
-bool
-AmrrMacStation::IsFailure (void) const
-{
- return (m_tx_retr + m_tx_err) > m_tx_ok * m_stations->m_failureRatio;
-}
-bool
-AmrrMacStation::IsEnough (void) const
-{
- return (m_tx_retr + m_tx_err + m_tx_ok) > 10;
-}
-void
-AmrrMacStation::ResetCnt (void)
-{
- m_tx_ok = 0;
- m_tx_err = 0;
- m_tx_retr = 0;
-}
-void
-AmrrMacStation::IncreaseRate (void)
-{
- m_txrate++;
- NS_ASSERT (m_txrate < GetNSupportedModes ());
-}
-void
-AmrrMacStation::DecreaseRate (void)
-{
- m_txrate--;
-}
-
-void
-AmrrMacStation::UpdateMode (void)
-{
- if (Simulator::Now () < m_nextModeUpdate)
- {
- return;
- }
- m_nextModeUpdate = Simulator::Now () + m_stations->m_updatePeriod;
- NS_LOG_DEBUG ("Update");
-
- bool needChange = false;
-
- if (IsSuccess () && IsEnough ())
- {
- m_success++;
- NS_LOG_DEBUG ("++ success="<<m_success<<" successThreshold="<<m_successThreshold<<
- " tx_ok="<<m_tx_ok<<" tx_err="<<m_tx_err<<" tx_retr="<<m_tx_retr<<
- " rate="<<m_txrate<<" n-supported-rates="<<GetNSupportedModes ());
- if (m_success >= m_successThreshold &&
- !IsMaxRate ())
- {
- m_recovery = true;
- m_success = 0;
- IncreaseRate ();
- needChange = true;
- }
- else
- {
- m_recovery = false;
- }
- }
- else if (IsFailure ())
- {
- m_success = 0;
- NS_LOG_DEBUG ("-- success="<<m_success<<" successThreshold="<<m_successThreshold<<
- " tx_ok="<<m_tx_ok<<" tx_err="<<m_tx_err<<" tx_retr="<<m_tx_retr<<
- " rate="<<m_txrate<<" n-supported-rates="<<GetNSupportedModes ());
- if (!IsMinRate ())
- {
- if (m_recovery)
- {
- m_successThreshold *= 2;
- m_successThreshold = std::min (m_successThreshold,
- m_stations->m_maxSuccessThreshold);
- }
- else
- {
- m_successThreshold = m_stations->m_minSuccessThreshold;
- }
- m_recovery = false;
- DecreaseRate ();
- needChange = true;
- }
- else
- {
- m_recovery = false;
- }
- }
- if (IsEnough () || needChange)
- {
- NS_LOG_DEBUG ("Reset");
- ResetCnt ();
- }
-}
-
-AmrrMacStations *
-AmrrMacStation::GetStations (void) const
-{
- return m_stations;
-}
-WifiMode
-AmrrMacStation::DoGetDataMode (uint32_t size)
-{
- UpdateMode ();
- NS_ASSERT (m_txrate < GetNSupportedModes ());
- uint32_t rateIndex;
- if (m_retry < 1)
- {
- rateIndex = m_txrate;
- }
- else if (m_retry < 2)
- {
- if (m_txrate > 0)
- {
- rateIndex = m_txrate - 1;
- }
- else
- {
- rateIndex = m_txrate;
- }
- }
- else if (m_retry < 3)
- {
- if (m_txrate > 1)
- {
- rateIndex = m_txrate - 2;
- }
- else
- {
- rateIndex = m_txrate;
- }
- }
- else
- {
- if (m_txrate > 2)
- {
- rateIndex = m_txrate - 3;
- }
- else
- {
- rateIndex = m_txrate;
- }
- }
-
- return GetSupportedMode (rateIndex);
-}
-WifiMode
-AmrrMacStation::DoGetRtsMode (void)
-{
- UpdateMode ();
- // XXX: can we implement something smarter ?
- return GetSupportedMode (0);
-}
-
-} // namespace ns3