3GPP <Document Types> <Series Numbers>.<Topic Numbers>
- Document Types
- TS Technical Specification
- TR Technical Report
- Development Stage
- Stage 1: Requirement and Service aspects
- Stage 2: Architec ture and Technical realization
- Stage 3: Protocols
- Series Numbers
- 21 Requirement
- 23 Core, Arch
- 24 NAS
- 36 LTE
- 38 NR
- Topic Numbers
- 25.501 NAS Protocol
- 38.331 RRC
- 38.321 MAC