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Glossary

LSA (Localised Service Area) in 3GPP: meaning and where it is specified

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

At a glance

Term
LSA
Stands for
Localised Service Area
Defined in
3GPP TR 21.905 V19.2.0, clause 4
Used in
TS 23.122, TS 42.043, TS 43.073

In plain words

LSA means "Localised Service Area", the term listed in 3GPP TR 21.905. TS 42.043 describes an LSA that the user has subscribed to and whose equipment can receive service. TS 23.122 says the cells constituting an LSA may not necessarily provide contiguous coverage. TS 43.073 says a network operator can define an LSA consisting of one cell or a number of cells.

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

  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 42.043 V19.0.0, clause 3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/42_series/42.043/42043-j00.zip
  3. 3GPP TS 23.122 V19.5.0, clause 1.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/23_series/23.122/23122-j50.zip
  4. 3GPP TS 43.073 V16.0.0, clause 4.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/43_series/43.073/43073-g00.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.