Method and apparatus for notifying user to complement service
A supplementary service and user-aware technology, which is applied in the field of user-aware supplementary service, can solve the problems that the VCC service control entity cannot perceive the change of the user's call attribute and cannot notify the user side, etc.
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example 3
[0105] Method Example 3: In the forwarding service, the GMSC notifies the calling side through the relay signaling of the CPG. Shown in Fig. 12, comprise the following steps:
[0106] Starting from step 7, the GMSC detects that forwarding is required;
[0107] 8. GMSC reroutes to the forwarding party according to the forwarding number;
[0108] 9. The GMSC sends a CPG message to the MGCF, which contains a forwarding instruction and a forwarding number;
[0109] 10. The MGCF converts the CPG message into a SIP message, which can be INFO, REFER, MESSAGE, etc., or a response message such as 181, and sends the message back to the calling party along the original INVITE session path;
[0110] 11. The VCC service control entity obtains the notification message in the session path, updates the call status of the user in the record as idle, and marks the session as non-switchable. The notification message then continues along the session path back to the calling side of the call. ...
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