Patent ID: 8964729
Filing Date: 2015-02-24
Classification: H04L,H04M

Abstract:
1. A method for realizing explicit call transfer, comprising: by a service centralization & continuity application server (SCC AS) receiving a call request sent by a second user equipment (UE), converting the call request sent by the second UE into a circuit switched service call request message, and sending the circuit switched service call request message to a third UE; carrying a session identifier and a replacement indication identifier in the circuit switched service call request message, wherein the session identifier is a session identifier between a first UE and the third UE, and the replacement indication identifier is used to indicate replacing a session between the first UE and the third UE by a session between the second UE and the third UE; and receiving a message returned by the third UE according to the circuit switched service call request message, controlling the third UE to establish a connection with the second UE, and controlling the third UE to break a connection with the first UE; wherein the third UE is an IP multimedia subsystem centralized service UE (ICS UE).