--- a/src/wifi/model/arf-wifi-manager.cc	Mon Dec 09 09:28:17 2013 -0800
+++ b/src/wifi/model/arf-wifi-manager.cc	Tue Dec 10 10:48:51 2013 -0500
@@ -30,6 +30,12 @@
 
 namespace ns3 {
 
+/**
+ * \brief hold per-remote-station state for ARF Wifi manager.
+ *
+ * This struct extends from WifiRemoteStation struct to hold additional
+ * information required by the ARF Wifi manager
+ */
 struct ArfWifiRemoteStation : public WifiRemoteStation
 {
   uint32_t m_timer;
@@ -105,6 +111,8 @@
  * is the initial transmission of a packet or the retransmission of a packet.
  * The fundamental reason for this is that there is a backoff between each data
  * transmission, be it an initial transmission or a retransmission.
+ *
+ * \param st the station that we failed to send DATA
  */
 void
 ArfWifiManager::DoReportDataFailed (WifiRemoteStation *st)