diff --git a/src/applications/v4ping/v4ping.h b/src/applications/v4ping/v4ping.h
index 32815e643..ec7ed3820 100644
--- a/src/applications/v4ping/v4ping.h
+++ b/src/applications/v4ping/v4ping.h
@@ -9,11 +9,20 @@ namespace ns3 {
 
 class Socket;
 
+/**
+ * \brief an application which sends one ICMP ECHO request, waits for a REPLYs
+ *        and reports the calculated RTT.
+ *
+ * Note: The RTT calculated is reported through a trace source.
+ */
 class V4Ping : public Application
 {
 public:
   static TypeId GetTypeId (void);
 
+  /**
+   * create a pinger applications
+   */
   V4Ping ();
   virtual ~V4Ping ();
 
diff --git a/src/helper/udp-echo-helper.h b/src/helper/udp-echo-helper.h
index 4f7b16abb..c4b4e24e3 100644
--- a/src/helper/udp-echo-helper.h
+++ b/src/helper/udp-echo-helper.h
@@ -28,15 +28,49 @@
 
 namespace ns3 {
 
+/**
+ * \brief create a server application which waits for input udp packets
+ *        and sends them back to the original sender.
+ */
 class UdpEchoServerHelper
 {
 public:
+  /**
+   * \param port the port the server will wait on for incoming packets
+   */
   UdpEchoServerHelper (uint16_t port);
 
+  /**
+   * \param name the name of the attribute to set
+   * \param value the value of the attribute to set
+   *
+   * Record an attribute to be set after the server application is created.
+   */
   void SetAttribute (std::string name, const AttributeValue &value);
 
+  /**
+   * \param node the node
+   *
+   * Create a udp echo server application on the input node
+   *
+   * \returns the application created
+   */
   ApplicationContainer Install (Ptr<Node> node) const;
+  /**
+   * \param nodeName the node
+   *
+   * Create a udp echo server application on the input node
+   *
+   * \returns the application created
+   */
   ApplicationContainer Install (std::string nodeName) const;
+  /**
+   * \param c the nodes
+   *
+   * Create one udp echo server application on each of the input nodes
+   *
+   * \returns the applications created, one application per input node.
+   */
   ApplicationContainer Install (NodeContainer c) const;
 
 private:
@@ -45,11 +79,24 @@ private:
   ObjectFactory m_factory;
 };
 
+/**
+ * \brief create an application which sends a udp packet and waits for an echo of this packet
+ */
 class UdpEchoClientHelper
 {
 public:
+  /**
+   * \param ip ip address of the remote udp echo server
+   * \param port port number of the remote udp echo server
+   */
   UdpEchoClientHelper (Ipv4Address ip, uint16_t port);
 
+  /**
+   * \param name the name of the attribute to set
+   * \param value the value of the attribute to set
+   *
+   * Record an attribute to be set after the client application is created.
+   */
   void SetAttribute (std::string name, const AttributeValue &value);
 
   /**
@@ -103,8 +150,29 @@ public:
    */
   void SetFill (Ptr<Application> app, uint8_t *fill, uint32_t fillLength, uint32_t dataLength);
 
+  /**
+   * \param node the node
+   *
+   * Create a udp echo client application on the input node
+   *
+   * \returns the application created
+   */
   ApplicationContainer Install (Ptr<Node> node) const;
+  /**
+   * \param nodeName the node
+   *
+   * Create a udp echo client application on the input node
+   *
+   * \returns the application created
+   */
   ApplicationContainer Install (std::string nodeName) const;
+  /**
+   * \param c the nodes
+   *
+   * Create one udp echo client application on each of the input nodes
+   *
+   * \returns the applications created, one application per input node.
+   */
   ApplicationContainer Install (NodeContainer c) const;
 
 private:
diff --git a/src/helper/v4ping-helper.cc b/src/helper/v4ping-helper.cc
index e8767db76..0e2467205 100644
--- a/src/helper/v4ping-helper.cc
+++ b/src/helper/v4ping-helper.cc
@@ -30,12 +30,6 @@ V4PingHelper::V4PingHelper (Ipv4Address remote)
   m_factory.Set ("Remote", Ipv4AddressValue (remote));
 }
 
-void 
-V4PingHelper::SetAttribute (std::string name, const AttributeValue &value)
-{
-  m_factory.Set (name, value);
-}
-
 ApplicationContainer
 V4PingHelper::Install (Ptr<Node> node) const
 {
diff --git a/src/helper/v4ping-helper.h b/src/helper/v4ping-helper.h
index bb313f80a..449bd2821 100644
--- a/src/helper/v4ping-helper.h
+++ b/src/helper/v4ping-helper.h
@@ -7,15 +7,40 @@
 
 namespace ns3 {
 
+/**
+ * \brief create a pinger application and associate it to a node
+ *
+ * This class creates one or multiple instances of ns3::V4Ping and associates
+ * it/them to one/multiple node(s).
+ */
 class V4PingHelper
 {
 public:
+  /**
+   * \param remote the address which should be pinged
+   */
   V4PingHelper (Ipv4Address remote);
 
-  void SetAttribute (std::string name, const AttributeValue &value);
-
+  /**
+   * \param nodes the list of nodes.
+   *
+   * Install a pinger application on each node in the input list of nodes.
+   * \returns a list of pinger applications, one for each input node
+   */
   ApplicationContainer Install (NodeContainer nodes) const;
+  /**
+   * \param node the node
+   *
+   * Install a pinger application on the input node
+   * \returns the pinger application created.
+   */
   ApplicationContainer Install (Ptr<Node> node) const;
+  /**
+   * \param nodeName the node
+   *
+   * Install a pinger application on the input node
+   * \returns the pinger application created.
+   */
   ApplicationContainer Install (std::string nodeName) const;
 
 private: