This TS defines the stage-2 service description for the General Packet Radio Service (GPRS) which is a packet bearer service and a main part of the packet domain.
The GPRS described in the present document is also the description of the GERAN and UTRAN related functionality of the Evolved Packet System (EPS) according to TS 23.401
A common packet domain Core Network is used for both Radio Access Networks (RAN) the GERAN and the UTRAN.
This common Core Network provides together with these RANs GPRS services. It is designed to support several
quality of service levels to allow efficient transfer of non real-time traffic (e.g. intermittent and bursty data transfers,
occasional transmission of large volumes of data) and real-time traffic (e.g. voice, video).