1 files changed, 155 insertions, 0 deletions
diff --git a/emu-radio/ns3-patch/wifi/model/ap-info-collection.h b/emu-radio/ns3-patch/wifi/model/ap-info-collection.h
new file mode 100644
index 00000000..704a63ba
--- /dev/null
+++ b/emu-radio/ns3-patch/wifi/model/ap-info-collection.h
@@ -0,0 +1,155 @@
+
+#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*/