Release ledger
Canonical Atlas record
TS 25.425
UTRAN Iur interface user plane protocols for Common Transport Channel data streams
Release evolution
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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-99 snapshot
Work affecting this release
0 indexed Change Requests · 5 connected Work Items.
Showing 12 CR records from the available cross-release sample. Browse release CR records (JSON) →
CR 0009 — Aligned definition of Rx Timing Deviation
CR 0032 rev.2 — General Corrections on Common Transport Channel Data Streams
CR 0042 rev.1 — Extension of USCH and DSCH data and control frames
CR 0010 rev.2 — Inclusion of DSCH and [TDD USCH] FP procedures
CR 0007 — Addition of UE-ID Indicator IE in Iur FACH FP
CR 0022 rev.2 — Corrections to 25.425 – Editor’s proposal
CR 0015 — Scheduling of SDU delivery from DRNC
CR 0038 — Specification Notations
CR 0002 — Handling of unknown IE or illegal IE value
CR 0026 rev.1 — Clarification of Services expected from data transport
CR 0006 rev.1 — Addition of Spare Extension.
CR 0028 — Handling of spare bits
Version history
Indexed versions
Showing 60 of 78 indexed versions.
Atlas classifications
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Work Items
Standards work connected to TS 25.425
QoS optimization for AAL2 connections over Iub and Iur interfaces
Rel-4 RAN improvements
Historical association · verification pendingLow Chip Rate TDD option
Historical association · verification pendingIub/Iur protocol aspects - for Low Chip Rate TDD option
Rel-5 RAN improvements
Historical association · verification pendingHigh Speed Downlink Packet Access
Historical association · verification pendingIub/Iur protocol aspects - for High Speed Downlink Packet Access
(Small) Technical Enhancements and Improvements for Rel-5
Rel-6 RAN improvements
Historical association · verification pendingDeleted - Rel-6 Evolutions of the transport in the UTRAN (ETRAN)
Historical association · verification pendingRel-6 Charging Management
Historical association · verification pendingFDD Enhanced Uplink
Historical association · verification pendingFDD Enhanced Uplink - UTRAN Iub/Iur Protocol Aspects
Beamforming Enhancements
(Small) Technical Enhancements and Improvements for Rel-6
Deleted - CT3 aspects of Mp
Historical association · verification pendingRel-7 RAN improvements
Historical association · verification pendingCT1 aspects of Mp
Historical association · verification pending1.28 Mcps TDD Enhanced Uplink: UTRAN Iub/Iur Protocol Aspects
Historical association · verification pendingMultiple-Input Multiple-Output (MIMO) antennas
Historical association · verification pendingMp (MRFC - MRFP) interface
Historical association · verification pending64QAM for HSDPA (FDD)
Historical association · verification pendingContinuous connectivity for packet data users
Enhanced CELL_FACH State in FDD
Historical association · verification pendingExtended WCDMA Cell Range
Improved L2 support for high data rates
(Small) Technical Enhancements and Improvements for Rel-7
7.68 Mcps TDD option
Historical association · verification pendingVHCRTDD: UTRAN Iub/Iur Protocol Aspects
Rel-8 RAN improvements
Historical association · verification pendingCombination of 64QAM and MIMO for HSDPA (FDD)
Historical association · verification pendingEnhanced UE Discontinuous Reception (DRX) for FDD
Enhanced CELL_FACH state in 1.28 Mcps TDD
MIMO for 1.28 Mcps TDD. Linked to Rel-8 Study on Scope of future HSPA Evolution for 1.28 Mcps TDD (UID_370041) TR 25.824
Enhanced Uplink for CELL_FACH State in FDD
Improved L2 for uplink
(Small) Technical Enhancements and Improvements for Rel-8
Cell Portion for 1.28 Mcps TDD
Rel-9 RAN improvements
Historical association · verification pending(Small) Technical Enhancements and Improvements for Rel-9
Core part: MU-MIMO for 1.28Mcps TDD
(Small) Technical Enhancements and Improvements for Rel-10
Core part: Further Enhancements to CELL_FACH
Core part: HSDPA Multiflow Data Transmission
(Small) Technical Enhancements and Improvements for Rel-11
Core part: Further Enhanced Uplink (EUL) enhancements
Historical association · verification pending(Small) Technical Enhancements and Improvements for Rel-12
Core part: UMTS Mobility enhancements for heterogeneous networks
Core part: L2/L3 Downlink enhancements for UMTS
Core part: DTX/DRX enhancements in CELL_FACH
Harmonized Standard
Historical association · verification pendingLawful Interception for GSM Features transposed to UMTS
Historical association · verification pendingOpen Service Access
Historical association · verification pendingEnd-to-end UMTS Quality of Service management
Historical association · verification pending(Small) Technical Enhancements and Improvements for R99
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Related standards
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