--- a/src/wifi/model/cara-wifi-manager.cc	Mon Dec 09 09:28:17 2013 -0800
+++ b/src/wifi/model/cara-wifi-manager.cc	Tue Dec 10 10:48:51 2013 -0500
@@ -32,6 +32,12 @@
 
 namespace ns3 {
 
+/**
+ * \brief hold per-remote-station state for CARA Wifi manager.
+ *
+ * This struct extends from WifiRemoteStation struct to hold additional
+ * information required by the CARA Wifi manager
+ */
 struct CaraWifiRemoteStation : public WifiRemoteStation
 {
   uint32_t m_timer;