1     Scope         
 2     References              
 3     Definitions 
        3.1     Terms defined elsewhere       
 4     Abbreviations and acronyms            
 5     Ru interface            
        5.1     Overview      
        5.2     Reference point         
        5.3     Physical entities         
 6     Signalling requirements      
        6.1     Transport resource information          
        6.2     Transport resource information indication       
        6.3     Transport resource release notification           
 7     Procedure descriptions        
        7.1     General         
        7.2     Procedures on the Ru interface           
 8     Selection and the use of the protocol            
        8.1     Security         
        8.2     Accounting    
        8.3     Sessions         
        8.4     Transport protocol     
        8.5     Routing considerations           
        8.6     Application advertisement      
 9     Ru protocol specification     
        9.1     Commands    
        9.2     Result-Code AVP values          
        9.3     AVPs 
        9.4     Use of namespaces    
10     Security considerations       
Bibliography