3GPP release structure, versioning, TSG rounds, and release freeze concept. Use when understanding 3GPP release numbering, TSG round schedules, or finding specifications in releases.
Official Release Timeline: https://www.3gpp.org/specifications-technologies/releases
3GPP specifications are published four times a year following quarterly Technical Specification Group (TSG) plenary meetings. Each Release represents a set of frozen technical specifications.
3GPP uses a version numbering scheme:
21.456 (Series number + spec number)Examples:
A TSG round is a quarterly plenary meeting where specifications are made available. Each TSG round produces:
Four TSG plenaries per year:
Example 2025 Schedule: