| 摘要 |
A method for performing an inter-system change (intersystem handover) from a first communication system 100 to a second communication system 102, where a user session exists between the first communication system 100 and a user terminal 104, and user data related to the user session (i.e. data context) is handled and managed within the first communications system 100. The method includes receiving an access request message 108 in the second communications system 102 for a data transmission from the user terminal 104, establishing, in the second communications system 102, communications resources (e.g. control channel, signaling resources and/or traffic channel) in relation to the user's data transmission, and transmitting a notification message 110 in relation to the communications resources, to enable the user terminal 104 to proceed with the data transmission to the second communication system 102. |
