DEVICE FOR COMPREHENSIVELY DECIDING SERVICE DOMAIN AND ACCESS DOMAIN, AND ROUTING CALLING METHOD

摘要

Provided are devices for comprehensive decision making of service domain and access domain and Voice over Long Term Evolution (VoLTE) call routing methods. The methods include that: when a call is originated from a Circuit-Switched (CS) network or an LTE/IP Multimedia Subsystem (IMS) network to a terminal, and when a device for comprehensive decision making of service domain and access domain determines that the terminal is in a dual registration mode, a Terminated Access Domain Selection (T-ADS) flow is executed to decide an access domain, thereby realizing the unity of a service domain and the access domain.