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Method and system for cross-domain switching of call based on IP multimedia subsystem

A multimedia subsystem and cross-domain technology, applied in the field of communication, can solve problems such as unreachable, call failure, and inability to make calls, and achieve the effects of improving update efficiency, streamlining the update process of media resources, and solving the cumbersome update process of media resources

Active Publication Date: 2011-11-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0047] 332b to 335b, if UE#3 answers the call first, when the 200 OK sent by UE#3 reaches the SCCAS, because the dialogue 2 established between UE#3 and UE A is released during the handover process, the response cannot If the caller UE A is reached, the call will fail;
[0060] 448b to 460b, if UE#3 answers first, although the handover of dialogue 2 is completed, but the dialogue 2 is set to hold during the handover process, even if UE#3 answers the call at this time, the two parties cannot communicate because of the disconnection. call
Therefore, in this scenario, the call failure will also occur.

Method used

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  • Method and system for cross-domain switching of call based on IP multimedia subsystem
  • Method and system for cross-domain switching of call based on IP multimedia subsystem

Examples

Experimental program
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Effect test

Embodiment 1

[0131] Fig. 5(a) and Fig. 5(b) are schematic flowcharts of a method for managing media resources in an IP multimedia subsystem provided by an application example of the present invention. In Figure 5, the calling UE A initiates a call request to the called user. Since the called UE has multiple UEs sharing the same PUI (Public User identity), the IMS network element will send the calling request to the called user respectively. Each UE thus establishes a dialogue with multiple UEs during the call establishment process, and the calling UE A satisfies the handover condition from the PS domain to the CS domain during the call process. In the above application scenario, a dialogue (dialogue 1) is generated between UE A and UE#2, and another dialogue (dialogue 2) is generated between UE A and UE#3, wherein the dialogue label is based on the initiator label (From tag ), the receiving party's mark (To tag) and the calling ID (call ID) are determined jointly. The specific process is ...

Embodiment 2

[0144] Fig. 8(a), Fig. 8(b) and Fig. 8(c) are schematic flowcharts of the method in the second embodiment of the present invention, and the second embodiment is another embodiment when the called party has forking.

[0145] The main difference between this embodiment and Embodiment 1 is that after the SCC AS receives the handover request from the MSC SERVER, it still uses forking to send a remote update request to the called UE of each conversation, but the SCC AS only uses one of the conversations (denoted as The response response of the first dialogue) (such as the update response of the dialogue received first) sends a switching response to the MSC SERVER, and saves the response information of the remaining dialogues. These update response information need to be associated with the ID of the dialogue to which it belongs.

[0146]If the called UE of a subsequent dialogue answers the call (sends a 200OK response message), but the dialogue is not the first dialogue, the SCC AS ...

Embodiment 3

[0167] The present invention is also applicable to the situation that the called party does not have forking but uses the forking technology to play the CRBT;

[0168] Image 6 It is a schematic flow chart diagram of playing color ring back tones using forking (forking) technology in the prior art, specifically including:

[0169] 601. The calling user equipment UE1 initiates a call initiation request, which carries the media resource information of UE1, and passes through the IMS network element on the calling side;

[0170] 602. The S-CSCF network element on the calling side sends a call initiation request to the S-CSCF network element on the called side;

[0171] 603. The S-CSCF network element at the called side routes the call request to the CRBT service providing server (CAT AS) of the called network;

[0172] 604. The CAT AS then sends the call request to the called user UE2 through the S-CSCF network element at the called side;

[0173] 605. The CAT AS uses dialog 2...

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Abstract

The invention provides a method and a system for cross-domain switching of a call based on an Internet Protocol (IP) multimedia subsystem. The method comprises the following steps of: in the process when a calling party originates a call request to a called party, forking of the called side is performed to generate responses to a plurality of sessions; and in the process of the call request, if the calling party originates switching from a Packet Switching (PS) domain to a Circuit Switching (CS) domain, simultaneously performing media resource update on the plurality of sessions.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a method and a module for managing media resources in an IP multimedia subsystem. Background technique [0002] In the current mobile network, a large number of PS (Packet Switch, Packet Domain Switching Network)-based networks (E-UTRAN, UTRAN-HSPA) are deployed, but their coverage is not the whole network and the whole region. In some places, the PS network The signal will be very poor. At this time, it is necessary to provide users with switching from PS to traditional CS (Circuit Switch, Circuit Switching Network) (UTRAN, GERAN), especially when the user is conducting a session. [0003] figure 1 It is a handover method approved by the standard organization. First, a session is ongoing between UE1 and UE2, and it is based on the PS bearer of IMS (IP Multimedia Core Network Subsystem, IP Multimedia Subsystem). The session is anchored in the SCC AS (Service Ce...

Claims

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Application Information

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IPC IPC(8): H04W36/14H04L29/06
CPCH04W76/022H04W76/12
Inventor 李世涛
Owner ZTE CORP
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