A method for managing a CS IRAT handover from a 2g/3g network to a LTE network

摘要

The invention relates to a method to manage a CS IRAT (Circuit Switch Inter RAT) handover of a user Equipment (UE) from a 2G/3G network to a LTE (Long Term Evolution) network in which:
- the UE equipment transmits its CS IRAT handover from 2G/3G to LTE capabilities to the BSC/RNC node,
- the BSC/RNC node selects a routing paths among said different routing paths based on the User Equipment capabilities for CS IRAT handover from 2G/3G to LTE and transmits to a MSC/VLR node (Mobile services Switching Center) of said 2G/3G network a Handover message comprising an information indicative of the selected path corresponding to the selected CS handover technology,
- the MSC/VLR node transfers said Handover message to said target eNodeB through a MME (Mobility Management Entity) node or through an IMF node (Interworking Function) depending on the selected CS handover technology.