ENABLING UE ACCESS DOMAIN SELECTION FOR TERMINATED SPEECH/VIDEO CALLS

摘要

PURPOSE: A UE(User Equipment) access domain selection method for received voice/video calls is provided to route calls in a mobile communication network through an ICCF(IMS CS Control Function), which is common to multiple access domains. CONSTITUTION: An ICCF transmits an invitation message for establishing a call to a receiving mobile station(S45). In consideration of the capacity of a local access network, the mobile station determines an access domain for processing the call(S49). The mobile station directs the selected access domain to the ICCF. According to the selected access domain, the call is established. The invitation message is an SIP invitation message.