A.0 General

23.0603GPPGeneral Packet Radio Service (GPRS)Release 17Service descriptionStage 2TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

This annex contains the rules applied by the SGSN upon PDP context activation to determine the APN and the corresponding P-GW/GGSN.

The selection process used by the SGSN to select P-GW and GGSN is described in clause 5.3.7.1. The procedures specified in TS 29.303 [100] apply to DNS-based P-GW selection.

APN selection refers to the process of selection and construction of the full APN (APN-NI + APN-OI). This full APN is then employed for interrogation of the DNS server to obtain the GGSN or P-GW address.