A Global

The Mobile

GERAN Plenary

Operators of GSM/GPRS systems need a strategy for future growth and interoperability, the evolution of GSM/EDGE radio access technologies offers such a path.

GSM/EDGE Radio Access Network

TSG GERAN is responsible for the specification of the Radio Access part of GSM/EDGE, more specifically:

  • RF layer,
  • Layer 1, 2 and 3, internal (Abis, Ater) and external (A, Gb) interfaces,
  • Conformance test specifications for all aspects of GERAN base stations and terminals and
  • GERAN specific O&M specifications for the nodes in the GERAN.

Terms of reference

The latest terms of reference were approved at 3GPP/OP Meeting#3 18-19 July 2000 in document ToR_GERAN.

The technical specification development work within 3GPP is accomplished by Technical Specification Groups (TSGs) according to the principles and rules contained in the Project reference documentation (Partnership Project Description, Partnership Project Agreement, Partnership Project Working Procedures). In particular, the TSGs report to the Project coordination Group (PCG), and may organize their work in Working Groups and liaise with other groups as appropriate.

Each TSG has the responsibility to develop, approve and maintain the specifications within its terms of reference.

The TSG GSM/EDGE Radio Access Network (GERAN) is responsible for the radio access part for GERAN specifications.

Specifically it has a responsibility for:

  • GERAN Radio aspects, and interfaces.
  • Management of work items placed under its responsibility.

Addressing the following areas of work:

  • RF aspects of GERAN
  • GERAN Radio Layer 1 specification;
  • GERAN Radio Layer 2 specification;
  • GERAN Radio Layer 3 RR specification
  • A interface specification, Gb interface specification
  • Internal GERAN interface specifications such as Abis, and Ater (CCU-TRAU)
  • Conformance test specifications for testing of all aspects of GERAN base stations
  • Conformance test specifications for testing of all aspects of GERAN terminals
  • Specifications for GERAN radio performance and RF system aspects.
  • GERAN specific O&M specifications for the nodes in the GERAN
  • Liaising with other TSGs to ensure overall co-ordination.

Glossary of terms

CCU Channel Codec Unit
CN Core Network
GSM Global System for Mobiles
EDGE Enhanced Data for GSM Evolution
RR Radio Resource
TRAU Transcoder and Rate Adapter Unit
O&M Operations and Maintenance

Useful links and information

About TSG GERAN List of elected officials and contact points
Meetings Next meeting information & previous meeting reports and documents
  Liaisons Statements
  Full GERAN meeting calendar
Documents Documents area
  Work items
General info Email exploder lists

GERAN Working groups

TSG GERAN WG1 Radio Aspects
TSG GERAN WG2 Protocol Aspects
TSG GERAN WG3new Terminal Testing


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