diff --git a/ErgometerServer/DoctorSessionThread.cs b/ErgometerServer/DoctorSessionThread.cs
new file mode 100644
index 0000000..523af96
--- /dev/null
+++ b/ErgometerServer/DoctorSessionThread.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Sockets;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ErgometerServer
+{
+    class DoctorSessionThread
+    {
+        private int session;
+        private TcpClient client;
+        private DoctorThread doctor;
+
+        public DoctorSessionThread(int session, TcpClient client, DoctorThread doctor)
+        {
+            this.session = session;
+            this.client = client;
+            this.doctor = doctor;
+        }
+
+        public void run()
+        {
+            
+        }
+    }
+}
diff --git a/ErgometerServer/DoctorThread.cs b/ErgometerServer/DoctorThread.cs
index 1681935..2ecd930 100644
--- a/ErgometerServer/DoctorThread.cs
+++ b/ErgometerServer/DoctorThread.cs
@@ -1,4 +1,8 @@
-using System.Net.Sockets;
+using System.Collections;
+using System.Net.Sockets;
+using System.Runtime.Remoting.Lifetime;
+using System.Threading;
+using ErgometerLibrary;
 
 namespace ErgometerServer
 {
@@ -8,7 +12,7 @@ namespace ErgometerServer
         Server server;
 
         string name;
-        int session;
+        ArrayList threads;
 
         bool running;
         bool loggedin;
@@ -19,14 +23,30 @@ namespace ErgometerServer
             this.client = client;
             this.server = server;
             this.name = "Unknown";
-            this.session = 0;
+            this.threads = new ArrayList();
             this.running = false;
             this.loggedin = false;
         }
 
         public void run()
         {
+            running = true;
+            loggedin = true;
+            while (loggedin && running)
+            {
+                if (threads.Count < server.clients.Count)
+                {
+                    DoctorSessionThread dt = new DoctorSessionThread(1, client, this);
+                    threads.Add(dt);
+                    Thread thread = new Thread(new ThreadStart(dt.run));
+                    thread.Start();
+                }
+            }
+        }
 
+        public void logout()
+        {
+            loggedin = false;
         }
     }
 }
\ No newline at end of file
diff --git a/ErgometerServer/ErgometerServer.csproj b/ErgometerServer/ErgometerServer.csproj
index c1a39b9..93b739f 100644
--- a/ErgometerServer/ErgometerServer.csproj
+++ b/ErgometerServer/ErgometerServer.csproj
@@ -47,6 +47,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="ClientThread.cs" />
+    <Compile Include="DoctorSessionThread.cs" />
     <Compile Include="DoctorThread.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Server.cs" />
diff --git a/ErgometerServer/Server.cs b/ErgometerServer/Server.cs
index 5fa1e0f..a584943 100644
--- a/ErgometerServer/Server.cs
+++ b/ErgometerServer/Server.cs
@@ -17,7 +17,7 @@ namespace ErgometerServer
             new Server();
         }
 
-        private List<ClientThread> clients;
+        public List<ClientThread> clients { get; }
         private DoctorThread doctor;
 
         public Server()
@@ -72,5 +72,15 @@ namespace ErgometerServer
             Thread thread = new Thread(new ThreadStart(doctor.run));
             thread.Start();
         }
+
+        public void sendToDoctor()
+        {
+            
+        }
+
+        public void sendToClient(int session)
+        {
+            
+        }
     }
 }