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     General       
 7     Traffic parameters and descriptors   
        7.1     Definitions      
        7.2     Requirements on traffic parameters and traffic descriptors         
        7.3     Traffic parameter specifications            
 8     IP transfer capabilities          
        8.1     Dedicated bandwidth transfer capability             
        8.2     Statistical bandwidth transfer capability             
        8.3     Best effort transfer capability  
        8.4     Delay-sensitive statistical bandwidth transfer capability
        8.5     Conditionally dedicated bandwidth transfer capability   
 9     Functions for traffic control, congestion control, and overload treatment        
        9.1     Traffic control functions           
        9.2     Functions for congestion control and overload treatment           
10     Methods and tools for IP traffic engineering
       10.1     MPLS traffic engineering         
       10.2     DiffServ-aware MPLS traffic engineering           
Annex A – The token bucket and the generic byte rate algorithm    
        A.1     The token bucket         
        A.2     The continuous-state token bucket       
        A.3     The generic byte rate algorithm             
        A.4     The virtual scheduling byte rate algorithm         
        A.5     The continuous-state leaky bucket byte rate algorithm 
        A.6     Throughput behaviour of the GBRA algorithm   
Annex B – Behaviour of two coordinated generic byte rate algorithms    
Appendix I – Illustration of token bucket behaviour    
        I.1                 Characterization of a flow with a single rate and a single token bucket       
        I.2                 Characterization of a flow with two rates and two token buckets (Bp < Bs)
        I.3                 Characterization of a flow with two rates and two token buckets (Bp > Bs)
Appendix II – Relation between IPTC/QoS class and IETF IntServ/DiffServ-specification     
       II.1     Dedicated bandwidth IPTC associated with a suitable QoS class  
       II.2     Statistical bandwidth IPTC associated with a suitable QoS class   
Appendix III – Guidelines for support of services using IP transfer capabilities in a differentiated services environment    
      III.1     Guidelines applicable to all ITU-T Y.1221 transfer capabilities      
      III.2     DBW guidelines            
      III.3     SBW guidelines             
      III.4     BE guidelines  
Appendix IV – Example methods for determining token-bucket parameters    
Bibliography