GERAN is an abbreviation for GSM EDGE

Enhanced Data Rates for GSM Evolution

Enhanced Data rates for GSM Evolution is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM...

 Radio Access Network. The standards for GERAN are maintained by the 3GPP

3GPP

The 3rd Generation Partnership Project is a collaboration between groups of telecommunications associations, known as the Organizational Partners...

 (Third Generation Partnership Project). GERAN is a key part of GSM, and also of combined UMTS/GSM networks.

GERAN is the radio part of GSM/EDGE

Enhanced Data Rates for GSM Evolution

Enhanced Data rates for GSM Evolution is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM...

 together with the network that joins the base stations (the Ater and Abis interfaces) and the base station controllers

Base Station Subsystem

The base station subsystem is the section of a traditional cellular telephone network which is responsible for handling traffic and signaling between a mobile phone and the network switching subsystem...

 (A interfaces, etc.) The network represents the core of a GSM network, through which phone calls and packet data are routed from and to the PSTN and Internet to and from subscriber handsets. A mobile phone operator's network comprises one or more GERANs, coupled with UTRAN

Utran

Utran is a census town in Surat district in the Indian state of Gujarat.-Geography:Utran is located at . It has an average elevation of 12 metres .-Demographics:...

s in the case of a UMTS/GSM network.

A GERAN without EDGE is a GRAN, but is otherwise identical in concept.

A GERAN without GSM is an ERAN.