One of the most important aspects of 5G Core is SBA- Services-based Architecture which is a complete paradigm shift from earlier generations.
In SBA, all NEs of Telecom Networks are deployed as VNF (Virtualized Network Function) or CNF (Cloud Native Network Function) and all services of these NFs are broken down into multiple microservices and these NFs communicate to each other using RESTful API Architecture using HTTP2 Protocol where all 3gpp specific data is written in JSON Schema.
All these services are available as Open API3.0 YAML file and details of these Services, Service operations, and Target consumers can be found in 3GPP TS 23.502
These give a lot of flexibility in building, Scaling, Deploying, and upgrading these services and open up a lot of innovation opportunities.
Below picture given a brief overview of services provided by AMF, SMF, AUSF, NRF, UDM and PCF
Feel Free to send a DM to me if you need more info. - Sanjay Kumar ↗️ on LinkedIn: #5G #SBA #VNF