Feature #6294
Updated by pespin 5 months ago
In an Inter-RAT setup a UE could perform a RAU coming from a 4G network. In that case the UE/MS is unknown to the SGSN and it should request the SGSN context from the MME. Similarly the MME needs to request the SGSN context from the SGSN if it receives a Tracking Area Update from an unknown UE. If this succeeds then the PDP context at the pgw needs to be modified. See diagrams TS 23.401 D 3.5-1 and D 3.6-1 for details. details
