| 摘要 |
Procedure for handover from a UMTS radio network to a GSM radio network, including the steps to, for each connection between a user equipment (UE) and a base station (Node B) in the UMTS radio network, initiate a state model including a start state NO IRAT MEAS, an uplink state IRAT MEAS UL, a downlink state IRAT MEAS DL, an up-/downlink state IRAT MEAS UL/DL, and a handover state IRAT HO, that in the handover state IRAT HO a Radio Network Controller (RNC) communicates with a Base Station Controller (BSC) to reserve resources for a connection, and if this succeeds, a HANDOVER FROM UTRAN COMMAND is transmitted to the user equipment (UE) to execute handover, and if the user equipment (UE) fails to get into contact with the GSM-network, and a handover by that is not possible, the procedure will continue in the state of the state model that preceded the handover state IRAT HO. |
