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 High-level requirements    
7 Functional requirements   
        7.1 Metering functional requirements    
        7.2 Charging functional requirements    
        7.3 Accounting and charging protocol high-level functional requirements
        7.4 Accounting and charging information model high-level functional requirements         
8 Architectural framework  
        8.1 Overall architectural framework     
        8.2 Functional architecture       
        8.3 Reference points    
9 Security consideration      
Appendix I – Offline and online charging scenarios     
        I.1 Scenario for offline charging         
        I.2      Scenario for online charging          
Appendix II – Study on existing accounting and charging practices     
       II.1 Accounting and charging practice in PSTN 
       II.2 Accounting and charging practice in 3GPP  
       II.3 Accounting and charging practice in ATIS TMOC  
       II.4 Accounting and charging practice in the Internet      
       II.5 Charging and accounting practice in ETSI TISPAN
       II.6 Comparison           
Bibliography