A Discrete-Event Network Simulator
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aarf-wifi-manager.cc
Go to the documentation of this file.
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2004,2005,2006 INRIA
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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*/
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#include "
aarf-wifi-manager.h
"
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#include "ns3/double.h"
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#include "ns3/uinteger.h"
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#include "ns3/log.h"
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#define Min(a,b) ((a < b) ? a : b)
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#define Max(a,b) ((a > b) ? a : b)
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NS_LOG_COMPONENT_DEFINE
(
"AarfWifiManager"
);
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namespace
ns3 {
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struct
AarfWifiRemoteStation
:
public
WifiRemoteStation
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{
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uint32_t
m_timer
;
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uint32_t
m_success
;
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uint32_t
m_failed
;
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bool
m_recovery
;
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uint32_t
m_retry
;
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uint32_t
m_timerTimeout
;
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uint32_t
m_successThreshold
;
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uint32_t
m_rate
;
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};
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NS_OBJECT_ENSURE_REGISTERED
(
AarfWifiManager
);
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TypeId
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AarfWifiManager::GetTypeId
(
void
)
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{
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static
TypeId
tid =
TypeId
(
"ns3::AarfWifiManager"
)
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.
SetParent
<
WifiRemoteStationManager
> ()
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.AddConstructor<AarfWifiManager> ()
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.AddAttribute (
"SuccessK"
,
"Multiplication factor for the success threshold in the AARF algorithm."
,
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DoubleValue
(2.0),
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MakeDoubleAccessor (&
AarfWifiManager::m_successK
),
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MakeDoubleChecker<double> ())
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.AddAttribute (
"TimerK"
,
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"Multiplication factor for the timer threshold in the AARF algorithm."
,
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DoubleValue
(2.0),
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MakeDoubleAccessor (&
AarfWifiManager::m_timerK
),
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MakeDoubleChecker<double> ())
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.AddAttribute (
"MaxSuccessThreshold"
,
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"Maximum value of the success threshold in the AARF algorithm."
,
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UintegerValue
(60),
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MakeUintegerAccessor (&
AarfWifiManager::m_maxSuccessThreshold
),
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MakeUintegerChecker<uint32_t> ())
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.AddAttribute (
"MinTimerThreshold"
,
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"The minimum value for the 'timer' threshold in the AARF algorithm."
,
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UintegerValue
(15),
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MakeUintegerAccessor (&
AarfWifiManager::m_minTimerThreshold
),
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MakeUintegerChecker<uint32_t> ())
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.AddAttribute (
"MinSuccessThreshold"
,
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"The minimum value for the success threshold in the AARF algorithm."
,
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UintegerValue
(10),
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MakeUintegerAccessor (&
AarfWifiManager::m_minSuccessThreshold
),
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MakeUintegerChecker<uint32_t> ())
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;
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return
tid;
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}
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AarfWifiManager::AarfWifiManager
()
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{
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NS_LOG_FUNCTION
(
this
);
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}
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AarfWifiManager::~AarfWifiManager
()
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{
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NS_LOG_FUNCTION
(
this
);
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}
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WifiRemoteStation
*
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AarfWifiManager::DoCreateStation
(
void
)
const
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{
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NS_LOG_FUNCTION
(
this
);
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AarfWifiRemoteStation
*station =
new
AarfWifiRemoteStation
();
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station->
m_successThreshold
=
m_minSuccessThreshold
;
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station->
m_timerTimeout
=
m_minTimerThreshold
;
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station->
m_rate
= 0;
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station->
m_success
= 0;
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station->
m_failed
= 0;
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station->
m_recovery
=
false
;
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station->
m_retry
= 0;
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station->
m_timer
= 0;
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return
station;
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}
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void
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AarfWifiManager::DoReportRtsFailed
(
WifiRemoteStation
*station)
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{
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NS_LOG_FUNCTION
(
this
<< station);
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}
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void
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AarfWifiManager::DoReportDataFailed
(
WifiRemoteStation
*st)
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{
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NS_LOG_FUNCTION
(
this
<< st);
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AarfWifiRemoteStation
*station = (
AarfWifiRemoteStation
*)st;
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station->
m_timer
++;
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station->
m_failed
++;
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station->
m_retry
++;
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station->
m_success
= 0;
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if
(station->
m_recovery
)
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{
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NS_ASSERT
(station->
m_retry
>= 1);
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if
(station->
m_retry
== 1)
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{
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// need recovery fallback
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station->
m_successThreshold
= (int)(
Min
(station->
m_successThreshold
*
m_successK
,
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m_maxSuccessThreshold
));
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station->
m_timerTimeout
= (int)(
Max
(station->
m_timerTimeout
*
m_timerK
,
145
m_minSuccessThreshold
));
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if
(station->
m_rate
!= 0)
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{
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station->
m_rate
--;
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}
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}
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station->
m_timer
= 0;
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}
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else
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{
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NS_ASSERT
(station->
m_retry
>= 1);
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if
(((station->
m_retry
- 1) % 2) == 1)
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{
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// need normal fallback
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station->
m_timerTimeout
=
m_minTimerThreshold
;
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station->
m_successThreshold
=
m_minSuccessThreshold
;
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if
(station->
m_rate
!= 0)
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{
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station->
m_rate
--;
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}
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}
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if
(station->
m_retry
>= 2)
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{
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station->
m_timer
= 0;
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}
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}
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}
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void
173
AarfWifiManager::DoReportRxOk
(
WifiRemoteStation
*station,
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double
rxSnr,
WifiMode
txMode)
175
{
176
NS_LOG_FUNCTION
(
this
<< station << rxSnr << txMode);
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}
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void
179
AarfWifiManager::DoReportRtsOk
(
WifiRemoteStation
*station,
180
double
ctsSnr,
WifiMode
ctsMode,
double
rtsSnr)
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{
182
NS_LOG_FUNCTION
(
this
<< station << ctsSnr << ctsMode << rtsSnr);
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NS_LOG_DEBUG
(
"station="
<< station <<
" rts ok"
);
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}
185
void
186
AarfWifiManager::DoReportDataOk
(
WifiRemoteStation
*st,
187
double
ackSnr,
WifiMode
ackMode,
double
dataSnr)
188
{
189
NS_LOG_FUNCTION
(
this
<< st << ackSnr << ackMode << dataSnr);
190
AarfWifiRemoteStation
*station = (
AarfWifiRemoteStation
*) st;
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station->
m_timer
++;
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station->
m_success
++;
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station->
m_failed
= 0;
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station->
m_recovery
=
false
;
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station->
m_retry
= 0;
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NS_LOG_DEBUG
(
"station="
<< station <<
" data ok success="
<< station->
m_success
<<
", timer="
<< station->
m_timer
);
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if
((station->
m_success
== station->
m_successThreshold
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|| station->
m_timer
== station->
m_timerTimeout
)
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&& (station->
m_rate
< (
GetNSupported
(station) - 1)))
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{
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NS_LOG_DEBUG
(
"station="
<< station <<
" inc rate"
);
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station->
m_rate
++;
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station->
m_timer
= 0;
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station->
m_success
= 0;
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station->
m_recovery
=
true
;
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}
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}
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void
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AarfWifiManager::DoReportFinalRtsFailed
(
WifiRemoteStation
*station)
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{
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NS_LOG_FUNCTION
(
this
<< station);
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}
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void
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AarfWifiManager::DoReportFinalDataFailed
(
WifiRemoteStation
*station)
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{
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NS_LOG_FUNCTION
(
this
<< station);
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}
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WifiTxVector
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AarfWifiManager::DoGetDataTxVector
(
WifiRemoteStation
*st, uint32_t size)
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{
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NS_LOG_FUNCTION
(
this
<< st << size);
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AarfWifiRemoteStation
*station = (
AarfWifiRemoteStation
*) st;
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return
WifiTxVector
(
GetSupported
(station, station->
m_rate
),
GetDefaultTxPowerLevel
(),
GetLongRetryCount
(station),
GetShortGuardInterval
(station),
Min
(
GetNumberOfReceiveAntennas
(station),
GetNumberOfTransmitAntennas
()),
GetNumberOfTransmitAntennas
(station),
GetStbc
(station));
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}
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WifiTxVector
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AarfWifiManager::DoGetRtsTxVector
(
WifiRemoteStation
*st)
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{
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NS_LOG_FUNCTION
(
this
<< st);
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AarfWifiRemoteStation
*station = (
AarfWifiRemoteStation
*) st;
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return
WifiTxVector
(
GetSupported
(station, 0),
GetDefaultTxPowerLevel
(),
GetLongRetryCount
(station),
GetShortGuardInterval
(station),
Min
(
GetNumberOfReceiveAntennas
(station),
GetNumberOfTransmitAntennas
()),
GetNumberOfTransmitAntennas
(station),
GetStbc
(station));
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}
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bool
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AarfWifiManager::IsLowLatency
(
void
)
const
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{
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NS_LOG_FUNCTION
(
this
);
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return
true
;
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}
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}
// namespace ns3
src
wifi
model
aarf-wifi-manager.cc
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1.8.1.2