Glossary
QZSS (Quasi-Zenith Satellite System) in 3GPP: meaning and where it is specified
At a glance
- Term
- QZSS
- Stands for
- Quasi-Zenith Satellite System
- Defined in
- 3GPP TR 21.905 V19.2.0, clause 4
- Used in
- TS 25.305, TS 25.331, TS 36.305
In plain words
QZSS means Quasi-Zenith Satellite System in 3GPP TR 21.905, and TS 25.305 titles a clause "Network-assisted Quasi-Zenith Satellite System (QZSS)". TS 36.305 lists Quasi-Zenith Satellite System, while TS 25.331 cites an IS-QZSS navigation service interface specification in its references.
Source: 3GPP TS 25.305 V19.0.0, clause 13.5. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/25_series/25.305/25305-j00.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 25.305 V19.0.0, clause 13.5. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/25_series/25.305/25305-j00.zip
- 3GPP TS 36.305 V19.0.0, clause 8.1.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/36_series/36.305/36305-j00.zip
- 3GPP TS 25.331 V19.0.0, clause 2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/25_series/25.331/25331-j00.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.