|
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 |
|
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
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 */ |
|
20 #ifndef ARF_WIFI_MANAGER_H |
|
21 #define ARF_WIFI_MANAGER_H |
|
22 |
|
23 #include "wifi-remote-station-manager.h" |
|
24 |
|
25 namespace ns3 { |
|
26 |
|
27 /** |
|
28 * \brief ARF Rate control algorithm |
|
29 * |
|
30 * This class implements the so-called ARF algorithm which was |
|
31 * initially described in <i>WaveLAN-II: A High-performance wireless |
|
32 * LAN for the unlicensed band</i>, by A. Kamerman and L. Monteban. in |
|
33 * Bell Lab Technical Journal, pages 118-133, Summer 1997. |
|
34 * |
|
35 * This implementation differs from the initial description in that it |
|
36 * uses a packet-based timer rather than a time-based timer as described |
|
37 * in XXX (I cannot find back the original paper which described how |
|
38 * the time-based timer could be easily replaced with a packet-based |
|
39 * timer.) |
|
40 */ |
|
41 class ArfWifiManager : public WifiRemoteStationManager |
|
42 { |
|
43 public: |
|
44 static TypeId GetTypeId (void); |
|
45 ArfWifiManager (); |
|
46 virtual ~ArfWifiManager (); |
|
47 |
|
48 private: |
|
49 virtual class WifiRemoteStation *CreateStation (void); |
|
50 uint32_t m_timerThreshold; |
|
51 uint32_t m_successThreshold; |
|
52 }; |
|
53 |
|
54 |
|
55 class ArfWifiRemoteStation : public WifiRemoteStation |
|
56 { |
|
57 public: |
|
58 ArfWifiRemoteStation (Ptr<ArfWifiManager> stations, |
|
59 int minTimerTimeout, |
|
60 int minSuccessThreshold); |
|
61 virtual ~ArfWifiRemoteStation (); |
|
62 |
|
63 virtual void ReportRxOk (double rxSnr, WifiMode txMode); |
|
64 virtual void ReportRtsFailed (void); |
|
65 virtual void ReportDataFailed (void); |
|
66 virtual void ReportRtsOk (double ctsSnr, WifiMode ctsMode, double rtsSnr); |
|
67 virtual void ReportDataOk (double ackSnr, WifiMode ackMode, double dataSnr); |
|
68 virtual void ReportFinalRtsFailed (void); |
|
69 virtual void ReportFinalDataFailed (void); |
|
70 |
|
71 private: |
|
72 virtual Ptr<WifiRemoteStationManager> GetManager (void) const; |
|
73 virtual WifiMode DoGetDataMode (uint32_t size); |
|
74 virtual WifiMode DoGetRtsMode (void); |
|
75 |
|
76 uint32_t m_timer; |
|
77 uint32_t m_success; |
|
78 uint32_t m_failed; |
|
79 bool m_recovery; |
|
80 uint32_t m_retry; |
|
81 |
|
82 uint32_t m_timerTimeout; |
|
83 uint32_t m_successThreshold; |
|
84 |
|
85 uint32_t m_rate; |
|
86 |
|
87 uint32_t m_minTimerTimeout; |
|
88 uint32_t m_minSuccessThreshold; |
|
89 |
|
90 Ptr<ArfWifiManager> m_stations; |
|
91 |
|
92 private: |
|
93 // overriden by AarfMacStation. |
|
94 virtual void ReportRecoveryFailure (void); |
|
95 virtual void ReportFailure (void); |
|
96 |
|
97 uint32_t GetMaxRate (void); |
|
98 uint32_t GetMinRate (void); |
|
99 |
|
100 bool NeedRecoveryFallback (void); |
|
101 bool NeedNormalFallback (void); |
|
102 |
|
103 protected: |
|
104 // called by AarfMacStation. |
|
105 uint32_t GetMinTimerTimeout (void); |
|
106 uint32_t GetMinSuccessThreshold (void); |
|
107 |
|
108 uint32_t GetTimerTimeout (void); |
|
109 uint32_t GetSuccessThreshold (void); |
|
110 |
|
111 void SetTimerTimeout (uint32_t timerTimeout); |
|
112 void SetSuccessThreshold (uint32_t successThreshold); |
|
113 }; |
|
114 |
|
115 } // namespace ns3 |
|
116 |
|
117 #endif /* ARF_WIFI_MANAGER_H */ |