Workgroup Number  | WG1  | 
Workgroup Name  | Use Cases and Overall Architecture  | 
Task Groups  | Architecture Task Group (ATG) Network Slicing Task Group (NSTG) Use Case Task Group (UCTG) 
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Workgroup Charter  | Architecture: Specify the overall architecture of O-RAN. Provide high level description of the O-RAN functions and the associated interfaces that connect them. Illustrate relevant implementation options, as and when needed, to explain the O-RAN architecture. Facilitate and arbitrate the cross-WG architectural topics/discussions. 
 Slicing: Definition of O-RAN slicing use cases and requirements. Definition of O-RAN slicing, Service Orchestration, and Service Assurance. Alignment of WGs. 
 Use Cases: Identification of potential use cases enabled by O-RAN. Definition of detailed top level use cases and inter-WG alignment. Clearly identify individual use case data requirements and their traceability. Dissemination of use cases. 
 Decoupled SMO: Specify Decoupled SMO Architecture. Definitions and Requirements for SMO Services. Set of specifications for specific SMO Service APIs and their interworking with other SMOSs as agreed. 
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Workgroup Scope  | WG1 is responsible for identification of key O-RAN use cases, deployment scenarios and development of the overall O-RAN architecture. There are currently three task groups under WG1.  | 
Workgroup Co-chairs  | Jinri Huang - China Mobile (CMCC) Ajay Rajkumar - AT&T (ATT)  |