A Global

The Mobile


3G systems should be based on new wide band, multimode, flexible radio access. This approach will ensure that systems based on 3GPP specifications will be capable of rapid development and deployment of competitive service offerings while still enabling global roaming.

TSG Radio Access Network (TSG RAN) is responsible for the definition of the functions, requirements and interfaces of the UTRA/E-UTRA network in its two modes, FDD & TDD. More precisely: radio performance, physical layer, layer 2 and layer 3 RR specification in UTRAN/E-UTRAN; specification of the access network interfaces (Iu, Iub, Iur, S1 and X2); definition of the O&M requirements in UTRAN/E-UTRAN and conformance testing for User Equipment and Base Stations.

Terms of Reference

The latest terms of reference were approved in document OP35_09 prepared by RAN#71.

The TSG Radio Access Network (TSG-RAN) is responsible for the GERAN, UTRAN and E-UTRAN, including their internal structures and functions, of systems for evolved GERAN, UTRAN, E-UTRAN and beyond.

Specifically it has a responsibility for:

• Radio aspects, functions, requirements and interfaces of GERAN, UTRAN (FDD & TDD) and E-UTRAN (FDD & TDD).
• Management of work items placed under its responsibility.

More specifically, TSG-RAN will address the following areas of work:

• Specification of layer 1, layer 2 and layer 3 of:

  • radio interface for MS and BTS,
  • radio interface for UE and Node B, and
  • radio interfaces for UE, relay node and eNode B.

• Overall GERAN, UTRAN and E-UTRAN architecture, including the specification of interfaces between GERAN, UTRAN and E-UTRAN and the Core Network, and of network interfaces within GERAN, UTRAN and E-UTRAN.
• Specification of LPP between UE and positioning server for E-UTRAN, and LPPa between eNode B and positioning server.
• GERAN, UTRAN and E-UTRAN O&M requirements.
• Transport of implementation specific O&M between the Management System and Node B.
• Conformance test specifications for testing of all aspects of GERAN, UTRAN and E-UTRAN base stations and evolved base stations.
• Specifications for radio performance and RF system aspects.
• Conformance test specification and test procedures for GERAN MS and UTRAN and E-UTRAN UE. 
• Liaising with other TSGs, in particular TSG SA, to ensure overall co-ordination.
• Elaborating on behalf of 3GPP the submissions to ITU-R. 

Glossary of terms 
BTS Base Transceiver Station
CN Core Network
FDD Frequency Division Duplex
GERAN GSM EDGE Radio Access Network
IP Internet Protocol
MS Mobile Station
O&M Operations and Maintenance
QoS Quality of Service
TDD Time Division Duplex
UE User Equipment
USIM Universal Subscriber Identity Module
UTRAN Universal Terrestrial Radio Access Network
Node B see TS 25.401
VHE Virtual Home Environment

Useful links and information

About TSG RAN List of elected officials
Documents Documents area
  Work items
Meetings Next meeting information & previous meeting reports and documents
  Liaisons Statements
  Full RAN meeting calendar
General info Email exploder lists
  Contact RAN@
RAN Working groups and Ad Hoc groups 
TSG RAN Plenary  
TSG RAN WG1 Radio Layer 1 (Physical layer)
TSG RAN WG2 Radio layer 2 and Radio layer 3 Radio Resource Control
TSG RAN WG3 UTRAN/E-UTRAN/NG-RAN architecture and related network interfaces
TSG RAN WG4 Radio Performance and Protocol Aspects
TSG RAN WG5 Mobile terminal conformance testing
TSG RAN WG6 Legacy RAN radio and protocol - CLOSED
TSG RAN AHG1 Ad-hoc group on ITU (internal) co-ordination
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