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Glossary

GBR (Guaranteed Bit Rate) in 3GPP: meaning and where it is specified

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

At a glance

Term
GBR
Stands for
Guaranteed Bit Rate
Defined in
3GPP TR 21.905 V19.2.0, clause 4
Used in
TS 29.244, TS 36.413, TS 38.463

In plain words

GBR means Guaranteed Bit Rate. TS 36.413 states: "This IE indicates the maximum and guaranteed bit rates of a GBR bearer for downlink and uplink." TS 29.244 covers GBR IE encoding, while TS 38.463 describes rates for a GBR E-RAB.

Source: 3GPP TS 36.413 V19.2.0, clause 9.2.1.18. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/36_series/36.413/36413-j20.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 36.413 V19.2.0, clause 9.2.1.18. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/36_series/36.413/36413-j20.zip
  3. 3GPP TS 29.244 V20.1.0, clause 8.2.9. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/29_series/29.244/29244-k10.zip
  4. 3GPP TS 38.463 V15.13.0, clause 9.3.1.19. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/38_series/38.463/38463-fd0.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.