3GPP43.129Packet-switched handover for GERAN A/Gb modeRelease 16Stage 2TS
This procedure and the corresponding signalling flows are defined in 3GPP TS23.401 .
For performing the inter-RAT handover from GERAN A/Gb mode to E-UTRAN the pre-conditions are:
– The MS is in packet transfer mode (GERAN A/Gb mode);
– The MS has at least one PDP Context established;
– The BSS supports PFM (Packet Flow Management) procedures.
5.3a.2 Preparation phase
The detailed signalling flows are specified in 3GPP TS 23.401  in sub-clause 126.96.36.199.2.
5.3a.3 Execution phase
The detailed signalling flows are specified in 3GPP TS 23.401  in sub-clause 188.8.131.52.3.