blob: 704a63baa2da00d0d371bb7091d6191457e9f39b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
#ifndef AP_INFO_COLLECTION_H
#define AP_INFO_COLLECTION_H
#include "ns3/mac48-address.h"
#include "ns3/nstime.h"
#include <vector>
#include "ns3/supported-rates.h"
//for wifi handover triggers
#define MAX_NUM_RSSI_SAMPMES 4
namespace ns3 {
class RssiMeasureInfo
{
public:
RssiMeasureInfo(Mac48Address bssid)
:m_index(0)
,m_numberOfSamples(0)
,m_bssid(bssid)
{
for(int i=0;i<MAX_NUM_RSSI_SAMPMES;i++)
m_rssiSamples[i]=0;
}
RssiMeasureInfo()
:m_index(0)
,m_numberOfSamples(0)
{
for(int i=0;i<MAX_NUM_RSSI_SAMPMES;i++)
m_rssiSamples[i]=0;
}
Mac48Address getBssid() const
{
return m_bssid;
}
void setBssid(Mac48Address bssid)
{
m_bssid=bssid;
}
bool isFull() const
{
return m_numberOfSamples>=MAX_NUM_RSSI_SAMPMES;
}
void addRssi(double rssi)
{
m_rssiSamples[m_index]=rssi;
m_index=(m_index+1)%MAX_NUM_RSSI_SAMPMES;
if(m_numberOfSamples<MAX_NUM_RSSI_SAMPMES)
m_numberOfSamples++;
}
double getAverageRssi()
{
if(!isFull())
return -1;
else
{
double sum=0;
for(int i=0;i<MAX_NUM_RSSI_SAMPMES;i++)
sum+=m_rssiSamples[i];
return sum/m_numberOfSamples;
}
}
void clear()
{
m_index=0;
m_numberOfSamples=0;
for(int i=0;i<MAX_NUM_RSSI_SAMPMES;i++)
m_rssiSamples[i]=0;
}
private:
double m_rssiSamples[MAX_NUM_RSSI_SAMPMES];
int m_index;
int m_numberOfSamples;
Mac48Address m_bssid;
};
typedef std::vector<RssiMeasureInfo> RssiMeasureInfoCollection;
/**
* \ingroup wifi
*
* this class is used to store information about one AP, so as to facilitate the AP selection process
*/
class ApInfo
{
public:
/**
* Create an entry containning the info about an AP
* \param bssid the bssid of an AP
* \param delayFromProbResp computed delay from response according to info in proberesp
* \param rssi a sample rssi associated with the AP obtained from a proberesp
* \param supportedRates supported rates of the AP
*/
ApInfo (Mac48Address bssid, Time delayFromProbResp, double rssi, SupportedRates supportedRates);
/**
* create an empty entry for the AP info
*/
ApInfo();
/**
* add a rssi sample to this Ap info
* \param rssi sample rssi obtained from proberesp
*/
void addRssi (double rssi);
/**
* remove a rssi sample from this AP info
* \param rssi
*/
void removeRssi (double rssi);
/**
* get Bssid of thIS AP from AP info
* \return bssid of AP
*/
Mac48Address getBssid() const;
/**
* get DelayFromProbResp of thIS AP from AP info
* \return computed DelayFromProbResp(time to wait to get into beacon missed state) of AP
*/
Time getDelayFromProbResp() const;
/**
* get mearsured average rssi for this AP
* \return computed average rssi for this AP
*
*/
double getAverageRssi () const;
SupportedRates getSupportedRates() const;
private:
Mac48Address m_bssid; //!< bssid of AP
Time m_delayFromProbResp; //!< time to wait to switch into beacon missed state
std::vector<double> m_rssiSamples; //!< contains all rssi sapmples obtained from probe response
SupportedRates m_supportedRates;
};
typedef std::vector<ApInfo> ApInfoCollection;
} //namespace ns3
#endif /* AP_INFO_COLLECTION_H*/
|
