3GPP 21-series — Requirements

The technical specifications (TS) are displayed in blue, while the reports (TR) are shown in green. TS that have been discontinued in earlier releases are indicated with a light blue color. TR in the '9' range that have been stopped are highlighted in light green. TS or TR with a yellow background indicate those updated at the latest Q3-2024 Plenary Meetings. The new ones are displayed with a single red dotted overline.

101 111 133 201 202 205 01u 801 866 900 902 904 905 910 914 915 916 917 978

a vertical bar on the left means that the full text and graphic content are available online for this TS/TR
when thick, it means that all figures have been redrawn


TS 21.101	REL 3 → 18	Technical Specifications and Technical Reports for a UTRAN-based 3GPP system
TS 21.111	REL 3 → 18	USIM and IC Card Requirements
TS 21.133	REL 3 → 4	Security Threats and Requirements
TS 21.201	REL 8 → 18	Technical Specifications and Technical Reports relating to an EPS based 3GPP system
TS 21.202	REL 8 → 18	Technical Specifications and Technical Reports relating to the Common IMS
TS 21.205	REL 15 → 18	Technical Specifications and Technical Reports for a 5G based 3GPP system
TR 21.01u	REL 3	Requirements for the UTRA system
TR 21.801	REL 3 → 18	Specification Drafting Rules
TR 21.866	REL 15	Study on Energy Efficiency Aspects of 3GPP Standards
TR 21.900	REL 3 → 18	Technical Specification Group Working Methods
TR 21.902	REL 6 → 10	Evolution of 3GPP system
TR 21.904	REL 3	UE Capability requirements
TR 21.905	REL 3 → 18	Vocabulary for 3GPP Specifications
TR 21.910	REL 3	Multi-mode UE issues: categories, principles and procedures
TR 21.914	REL 14	Release-14 Description
TR 21.915	REL 15	Release 15 Description – Summary of Rel‑15 Work Items
TR 21.916	REL 16	Release 16 Description – Summary of Rel‑16 Work Items
TR 21.917	REL 17	Release 17 Description – Summary of Rel‑17 Work Items
TR 21.978	REL 3	CAMEL Control of VoIP Services