Glossary
UDUB (User Determined User Busy) in 3GPP: meaning and where it is specified
At a glance
- Term
- UDUB
- Stands for
- User Determined User Busy
- Defined in
- 3GPP TR 21.905 V19.2.0, clause 4
- Used in
- TS 22.001, TS 23.205, TS 23.231
In plain words
The vocabulary entry expands UDUB as "UDUB User Determined User Busy". Technical Specification (TS) 23.205 and TS 23.231 use UDUB in clause headings, while TS 22.001 names a UDUB condition. The headings place it at clause 13.4.2.2 in both TS 23.205 and TS 23.231, and clause C.3 in TS 22.001.
Source: 3GPP TR 21.905 V19.2.0, clause 4. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/21_series/21.905/21905-j20.zip
Sources
- 3GPP TR 21.905 V19.2.0, clause 4. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/21_series/21.905/21905-j20.zip
- 3GPP TS 23.231 V18.0.0, clause 13.4.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/23_series/23.231/23231-i00.zip
- 3GPP TS 23.205 V18.0.0, clause 13.4.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/23_series/23.205/23205-i00.zip
- 3GPP TS 22.001 V19.0.1, clause C.3. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/22_series/22.001/22001-j01.zip
How this page was made
The facts box comes straight from the 3GPP TDoc list and specification archive as indexed by 3GPP Scout. An AI model (GPT-6 Luna) wrote the paragraph and named the source of each sentence. Code checked every quote word for word against the stored source text and every number against the cited source. A second AI model from another company (Claude Opus 5.5) reviewed the paragraph against the same sources. The 3GPP documents themselves govern.