Display method and display system of early media in session

Abstract

The invention discloses a display method of early media in a session, which includes: a CAT AS of a calling party determines whether a 18X response of a called party of a received session is a first 18X response with an early media session description protocol (SPD) request of the session, if yes, a timer is started. When the CAT AS receives the 18X response with the early media SDP request of another called party of the session within a timing period of the timer, the CAT AS refuses all early media SDP requests of the session after the timer is time-out, and the 18X response with the early media SDP request provided by the CAT AS is generated for the calling party and sent to the calling party. The invention simultaneously discloses a display system of early media in the session. The display method and the display system of early media in the session provide better early media experience for a calling user.

Description

technical field [0001] The present invention relates to early media playing technology, in particular to a method and system for playing early media in a session of a multimedia subsystem (IMS, IPMultimedia Subsystem). Background technique [0002] In the prior art, the CRBT service can be implemented in the IP Multimedia Subsystem (IMS, IP Multimedia Subsystem) network, that is, when a calling user dials a call to the called user, he can hear or see that the called party plays a ringtone for the calling party. The color ring tone instead of the simple prompt tone played by the switch. [0003] figure 1 It is a flow chart of playing the ring back tone service in the IMS network, such as figure 1 As shown, the service of playing CRBT specifically includes the following steps: [0004] Step 101, the calling user UA1 sends a calling request to the called user UA2; [0005] Step 102, after the Serving Call Session Control Function entity (S-CSCF, Serving CallSession Control ...

AI Technical Summary

Problems solved by technology

In this scenario, since each terminal may sign up for different services, such as different CRBT services, in this case, the caller will receive multiple early media about CRBT, and some functions are relatively simple and can only Terminals that process one channel of media will generate errors because they cannot handle multiple media streams, but for some terminals that can handle multiple media streams, they will be confused because they receive multiple media streams at the same time, and the playback is mixed together. ringtone

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