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Glossary

EPS (Evolved Packet System) in 3GPP: meaning and where it is specified

Published 2026-10-16Updated 2026-10-16

At a glance

Term
EPS
Stands for
Evolved Packet System
Defined in
3GPP TR 21.905 V19.2.0, clause 4
Used in
TS 23.401, TS 24.301, TS 24.501

In plain words

The vocabulary entry expands EPS to Evolved Packet System. TS 24.301 says EPS consists of "evolved packet core network and the evolved universal terrestrial radio access network". TS 23.401 uses the name for its Stage 2 service description of the Evolved 3GPP Packet Switched Domain. TS 24.501 includes EPS in the abbreviation EPS-UPIP, for user-plane integrity protection in EPS.

Source: 3GPP TS 24.301 V19.8.0, clause 3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/24_series/24.301/24301-j80.zip

Sources

  1. 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
  2. 3GPP TS 24.301 V19.8.0, clause 3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/24_series/24.301/24301-j80.zip
  3. 3GPP TS 23.401 V19.6.0, clause 1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/23_series/23.401/23401-j60.zip
  4. 3GPP TS 24.501 V19.8.0, clause 3.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/24_series/24.501/24501-j80.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.