GSM/EDGE Overall description; Stage 2
The present document defines the stage 2 service description for a GSM/EDGE Radio Access Network (GERAN). ITU‑T Recommendation I.130 describes a three-stage method for characterisation of telecommunication services, and CCITT Q.65 defines stage 2 of the method.
The present document illustrates how the services requested by a GSM/UMTS Core Network are realized by the GERAN.
The main focus of the present document is on functionality related to the Iu interfaces. The aim of the present document is not to describe functionality related to the A and Gb interfaces in details. There is no detailed description of the interfaces towards the core network and only references are given to the appropriate specifications.