HANDOVER FROM CIRCUIT SWITCHED DOMAIN TO CIRCUIT SWITCHED SERVICE OVER PACKET SWITCHED DOMAIN

摘要

A method for initiating handover of a circuit switched service using a ci rcuit switched bearer of a mobile station (31) from a circuit switched to a packet switched domain in a mobile communications network, the mobile commun ications network comprising a radio network and a core network, the radio ne twork comprising a controlling node (32, 32'), the mobile station being allo cated an IP address and access port, said method comprising the controlling node communicating to the core network a relocation/handover required messag e; said relocation/handover required message comprising an indication of the IP address and access port allocated to the mobile station.