CONTENTS

 1     Scope        
 2     References             
 3     Definitions
        3.1     Terms defined elsewhere      
        3.2     Terms defined in this Recommendation          
 4     Abbreviations and acronyms           
 5     Conventions           
 6     Overview  
 7     Functional model   
 8     Key assumptions    
        8.1     User terminal aspects            
        8.2     Networks aspects      
        8.3     Media handling aspects         
        8.4     End-to-end considerations     
 9     Security considerations       
Appendix I – Service scenarios for providing QoS enabled mobile VoIP service    
        I.1               User terminal moving in a single operator's network       
        I.2               Interworking between different operators' networks       
        I.3               User terminal moving between different access networks within the same operator's network    
Appendix II – Mapping between functions defined in NGN and 3GPP, Mobile WiMAX, WiFi entities    
       II.1     Mapping of 3GPP entities to NGN functional entities    
       II.2     Mapping of mobile WiMAX entities to NGN functional entities 
       II.3     Mapping of WiFi entities to NGN functional entities     
Bibliography