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     Introduction      
 7     General principles of the functional architecture     
 8     Functional network architecture overview 
        8.1     NGN architecture overview           
        8.2     IMT-Advanced architecture overview and NGN    
 9     Generalized functional architecture and functional entities   
        9.1     Network functions 
        9.2     Network functional entities