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NF Software Engineering — Building 5G Core Network Functions · Pro
Open5GS is the most widely-deployed open-source 5GC. It is a C codebase that originated as NextEPC for 4G and was extended to support 5GC in Rel-15 and beyond. The C choice gives Open5GS strong control over memory and CPU efficiency — its UPF in particular is optimized for high packet rates. Open5GS supports the full set of NFs (AMF, SMF, UPF, NRF, AUSF, UDM, UDR, PCF, NSSF, BSF, plus 4G MME/SGW/PGW for hybrid deployments). It is the engine behind countless private 5G labs, university research deployments, and small-operator productions. The C codebase is dense but well-structured; reading…