Table of 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  
        6.1     Functional characteristics of SDN for transport networks          
        6.2     Architecture of SDN for transport networks    
        6.3     Interaction between SDN controller and transport network     
        6.4     Interaction between SDN controller and applications  
        6.5     Management functions interactions  
        6.6     Transport resource views       
 7     Controller arrangements    
        7.1     Multi-level control hierarchy 
        7.2     Multi-layer control     
        7.3     Multi-domain control aspects
 8     Control components            
        8.1     Call controller components    
        8.2     Connection controller (CC) component             
        8.3     Routing controller (RC) component    
        8.4     Link resource manager (LRM) component       
        8.5     Discovery agent (DA) component        
        8.6     Termination and adaptation performer (TAP) component        
        8.7     Directory service (DS) component       
        8.8     Resource notification controller component  
 9     Topology and discovery      
        9.1     Creation of network topology by auto discovery procedure     
        9.2     Creation of abstracted network topology         
10     Controller interactions       
       10.1     Interaction type 1      
       10.2     Interaction type 2      
       10.3     Interaction type 3      
       10.4     Interaction type 4      
       10.5     Interaction type 5      
11     Reference points  
       11.1     SDN control plane interfaces
       11.2     Functional requirements for the CPI 
       11.3     Interaction between NCCs over CPI   
12     Control communications network 
13     Management aspects         
       13.1     Management of SDN controllers         
       13.2     Management of control plane interfaces (CPI)             
       13.3     Management of control communication network (CCN)          
14     Identifiers
       14.1     Resources in the transport network  
       14.2     Control view of transport resources  
       14.3     Control components
       14.4     Control artefacts       
       14.5     Reference points      
       14.6     Control communications network      
15     Scalability considerations  
       15.1     Scalability of the controller   
       15.2     Scalability of components     
16     Connection availability enhancement techniques  
       16.1     Data plane protection             
       16.2     Controller based restoration
Annex A – Use of the CIM to represent resources    
Bibliography