A Discrete-Event Network Simulator
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2005,2006 INRIA
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
19  */
24 #include <vector>
25 #include <algorithm>
26 #include "ns3/event-id.h"
27 #include "ns3/nstime.h"
29 namespace ns3 {
31 class WifiPhy;
32 class PhyListener;
33 class Txop;
34 class FrameExchangeManager;
52 {
53 public:
55  virtual ~ChannelAccessManager ();
86  void Add (Ptr<Txop> txop);
95  bool NeedBackoffUponAccess (Ptr<Txop> txop);
105  void RequestAccess (Ptr<Txop> txop);
115  Time GetAccessGrantStart (bool ignoreNav = false) const;
123  void NotifyRxStartNow (Time duration);
128  void NotifyRxEndOkNow (void);
133  void NotifyRxEndErrorNow (void);
141  void NotifyTxStartNow (Time duration);
147  void NotifyMaybeCcaBusyStartNow (Time duration);
155  void NotifySwitchingStartNow (Time duration);
159  void NotifySleepNow (void);
163  void NotifyOffNow (void);
167  void NotifyWakeupNow (void);
171  void NotifyOnNow (void);
177  void NotifyNavResetNow (Time duration);
183  void NotifyNavStartNow (Time duration);
189  void NotifyAckTimeoutStartNow (Time duration);
193  void NotifyAckTimeoutResetNow (void);
199  void NotifyCtsTimeoutStartNow (Time duration);
203  void NotifyCtsTimeoutResetNow (void);
212  bool IsBusy (void) const;
215 protected:
216  void DoDispose (void) override;
219 private:
223  void UpdateBackoff (void);
231  Time MostRecent (std::initializer_list<Time> list) const;
251  void DoRestartAccessTimeoutIfNeeded (void);
257  void AccessTimeout (void);
261  void DoGrantDcfAccess (void);
268  virtual Time GetSifs (void) const;
274  virtual Time GetSlot (void) const;
280  virtual Time GetEifsNoDifs (void) const;
285  typedef std::vector<Ptr<Txop>> Txops;
301  bool m_sleeping;
302  bool m_off;
310 };
312 } //namespace ns3
virtual Time GetSifs(void) const
Return the Short Interframe Space (SIFS) for this PHY.
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:103
Time m_eifsNoDifs
EIFS no DIFS time.
void UpdateBackoff(void)
Update backoff slots for all Txops.
bool m_off
flag whether it is in off state
std::vector< Ptr< Txop > > Txops
typedef for a vector of Txops
Time m_lastRxDuration
the last receive duration time
Time m_lastCtsTimeoutEnd
the last CTS timeout end time
void NotifyOnNow(void)
Notify the Txop that the device has been resumed from off mode.
void SetupPhyListener(Ptr< WifiPhy > phy)
Set up listener for PHY events.
void NotifyMaybeCcaBusyStartNow(Time duration)
Time m_lastBusyStart
the last busy start time
bool IsBusy(void) const
Check if the device is busy sending or receiving, or NAV or CCA busy.
EventId m_accessTimeout
the access timeout ID
void DoDispose(void) override
Destructor implementation.
Time MostRecent(std::initializer_list< Time > list) const
Return the most recent time.
void RemovePhyListener(Ptr< WifiPhy > phy)
Remove current registered listener for PHY events.
Time GetBackoffStartFor(Ptr< Txop > txop)
Return the time when the backoff procedure started for the given Txop.
Manage a set of ns3::TxopHandle a set of independent ns3::Txop, each of which represents a single DCF...
bool m_sleeping
flag whether it is in sleeping state
Time m_lastTxDuration
the last transmit duration time
bool NeedBackoffUponAccess(Ptr< Txop > txop)
Determine if a new backoff needs to be generated when a packet is queued for transmission.
void NotifyRxStartNow(Time duration)
Time m_lastRxStart
the last receive start time
Time m_lastBusyDuration
the last busy duration time
Definition: third.py:93
void NotifyRxEndErrorNow(void)
Notify the Txop that a packet reception was just completed unsuccessfully.
Time m_lastNavDuration
the last NAV duration time
void NotifyCtsTimeoutStartNow(Time duration)
Notify that CTS timer has started for the given duration.
Ptr< WifiPhy > m_phy
pointer to the PHY
virtual Time GetEifsNoDifs(void) const
Return the EIFS duration minus a DIFS.
void NotifyOffNow(void)
Notify the Txop that the device has been put in off mode.
void SetupFrameExchangeManager(Ptr< FrameExchangeManager > feManager)
Set up the Frame Exchange Manager.
Time m_lastSwitchingStart
the last switching start time
void NotifySleepNow(void)
Notify the Txop that the device has been put in sleep mode.
Listener for PHY events.
#define list
Time m_lastTxStart
the last transmit start time
void NotifyNavResetNow(Time duration)
void NotifyAckTimeoutStartNow(Time duration)
Notify that ack timer has started for the given duration.
Txops m_txops
the vector of managed Txops
virtual Time GetSlot(void) const
Return the slot duration for this PHY.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
void NotifyRxEndOkNow(void)
Notify the Txop that a packet reception was just completed successfully.
Time GetAccessGrantStart(bool ignoreNav=false) const
Access will never be granted to the medium before the time returned by this method.
bool m_lastRxReceivedOk
the last receive OK
PhyListener * m_phyListener
the PHY listener
void NotifyCtsTimeoutResetNow(void)
Notify that CTS timer has reset.
Ptr< FrameExchangeManager > m_feManager
pointer to the Frame Exchange Manager
void DoGrantDcfAccess(void)
Grant access to Txop using DCF/EDCF contention rules.
An identifier for simulation events.
Definition: event-id.h:53
void RequestAccess(Ptr< Txop > txop)
Time m_lastNavStart
the last NAV start time
void NotifySwitchingStartNow(Time duration)
void NotifyNavStartNow(Time duration)
Time m_lastSwitchingDuration
the last switching duration time
Time GetBackoffEndFor(Ptr< Txop > txop)
Return the time when the backoff procedure ended (or will ended) for the given Txop.
void AccessTimeout(void)
Called when access timeout should occur (e.g.
void NotifyTxStartNow(Time duration)
A base class which provides memory management and object aggregation.
Definition: object.h:87
void NotifyWakeupNow(void)
Notify the Txop that the device has been resumed from sleep mode.
Time m_lastAckTimeoutEnd
the last Ack timeout end time
void NotifyAckTimeoutResetNow(void)
Notify that ack timer has reset.