Method and system for implementing IMS centralized service final call
An implementation method and call termination technology, applied in the field of communications, can solve the problems affecting the calling user experience, long call setup time, etc., and achieve the effects of shortening setup time, shortening call setup time, and improving experience
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[0108] The technical solutions of the present invention will be further described in more detail in conjunction with the accompanying drawings and specific embodiments.
[0109] Such as Figure 4 As shown in the figure, it is a flow chart of the ICS termination service in which the session control path is in the PS domain in the embodiment of the present invention.
[0110] exist Figure 4 Among them, when the session control path is in the PS domain, method 1 in the implementation mode can use ICCF PSI (Public Service Identities, public service identification) number identification, when the call establishment request on the bearer control path precedes the session control path When the session establishment request on the Internet reaches the terminal user, the terminal user checks whether the calling number in the call information is the ICCF PSI number. If it is the ICCF PSI number, it indicates that the ICS call is initiated by ICCF as a B2BUA, so the terminal user needs...
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