Release ledger
Canonical Atlas record
TS 36.521-4
Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) conformance specification; Radio transmission and reception; Part 4: Satellite access Radio Frequency (RF) and performance Conformance Testing
Responsible WGR5
StatusUnder change control
Initial releaseRel-18
Selected releaseRel-19
Latest indexed version19.3.0
Series36
TypeTS
Release evolution
Compare evidence between releases
Use indexed version, Work Item and Change Request evidence to see what changed around this specification. This is an evidence trail, not a clause-by-clause normative diff.
Rel-19 snapshot
Work affecting this release
65 indexed Change Requests · 4 connected Work Items.
Showing 12 CR records from the available cross-release sample. Browse release CR records (JSON) →
CR 0153 rev.1 — Updates to AMPR, addition emssions requirements and additional spurious emissions requirements test cases related to NS_09N, NS_10N and NS_15N
CR 0156 rev.1 — Update to minimum test time for IoT NTN TDD NGSO
CR 0155 — Update to frequency error for IoT NTN TDD mode
CR 0154 — Update to performance requirements for IoT NTN TDD mode
CR 0152 — IoT NTN TDD - Power density test update for band 249
CR 0144 rev.1 — Update RF Rx TCs for IoT NTN TDD
CR 0151 rev.1 — Updates on usages of NTN IoT band 255 band 254 and band 252
CR 0145 rev.1 — Clarification for the NTN IOT band 255 and 254
CR 0139 rev.1 — Clean up of NB-IoT NTN A-MPR and A-Spur TCs
CR 0143 rev.1 — Correction of Editor Notes for 6.4B.1_2 and 7.6B.3
CR 0142 rev.1 — Update RF Tx TCs for IoT NTN TDD
CR 0138 rev.1 — Update AMPR for NB-IoT NTN band249
Version history
Indexed versions
Showing 20 of 20 indexed versions.
19.3.0Rel-19—2026-10-09
19.2.0Rel-19RAN#1122026-07-06
19.1.1Rel-19RAN#1112026-04-09
19.1.0Rel-19RAN#1112026-03-23
19.0.0Rel-19RAN#1102026-01-15
18.8.0Rel-18RAN#1102026-01-15
18.7.0Rel-18RAN#1092025-10-06
18.6.0Rel-18RAN#1082025-07-07
18.5.0Rel-18RAN#1072025-04-03
18.4.0Rel-18RAN#1062025-01-21
18.3.0Rel-18RAN#1052024-10-09
18.2.0Rel-18RAN#1042024-07-04
18.1.0Rel-18RAN#1032024-04-11
18.0.0Rel-18RAN#1022024-01-03
1.0.0Rel-18 · pre-approvalRAN#1022023-12-04
0.4.0Rel-18 · pre-approvalRAN5#1012023-12-04
0.3.0Rel-18 · pre-approvalRAN5#1002023-09-08
0.2.0Rel-18 · pre-approvalRAN5#992023-06-08
0.1.0Rel-18 · pre-approvalRAN5#982023-03-17
19.3.0Rel-19RAN#113—
Atlas classifications
Meaning and provenance
No Atlas classifications have been attached yet.
Work Items
Standards work connected to TS 36.521-4
TEI17_Test
Rel-17parsed(Small) Test Technical Enhancements and Improvements for Rel-17
IoT_NTN_FDD_LS_band-UEConTest
Rel-18parsedUE Conformance - Introduction of FDD LTE band (L+S band) for IoT NTN operation
IoT_NTN_extLband-UEConTest
Rel-18parsedUE Conformance - Introduction of the Extended L-band (UL 1668-1675MHz, DL 1518-1525MHz) for IoT NTN
LTE_NBIOT_eMTC_NTN_req-UEConTest
Rel-18officialUE Conformance - NB-IoT (Narrowband IoT)/eMTC (enhanced Machine Type Communication) core & performance requirements for Non-Terrestrial Networks (NTN)
TEI18_Test
Rel-18parsedTest - (Small) Technical Enhancements and Improvements for Rel-18
IoT_NTN_FDD_S_band-UEConTest
Rel-19parsedUE Conformance - Introduction of another IoT-NTN S-band (MSS band 2000-2020 MHz UL and 2180-2200 MHz DL)
IoT_NTN_TDD-UEConTest
Rel-19parsedUE Conformance - Introduction of IoT-NTN TDD mode
NR_IoT_NTN_req_test_enh-UEConTest
Rel-19parsedUE Conformance - Enhanced requirements and conductive test methodology for NR NTN and IoT NTN
TEI19_Test
Rel-19parsedTest - (Small) Technical Enhancements and Improvements for Rel-19
Knowledge graph
Related standards
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