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Calling method and system

A technology for calling equipment and service calls, which is applied in the field of calling methods and systems, can solve the problems of increasing call connection time, achieve the effect of reducing connection time and avoid triggering configuration services

Inactive Publication Date: 2008-03-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention proposes a method and system for calling, which solves the problem of increasing the call connection duration caused by triggering configuration services when calling back

Method used

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  • Calling method and system

Examples

Experimental program
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Embodiment 1

[0054] The main idea of ​​this embodiment is that when the PSAP calls back, it carries an identifier in the SIP message. After the S-CSCF receives this message and detects that the request contains the specified identifier, it skips matching the local related configuration service. , and forward the request to the P-CSCF.

[0055] As shown in the sequence diagram of the S-CSCF directly forwarding the emergency call in Figure 3, when the PSAP is in the GSTN domain, execute 201A-1 and 201A-2, and when the PSAP is in the IP domain, execute 201B;

[0056] In steps 201A-1 to 201A-2, the PSAP initiates a callback to the user from the GSTN domain, and the MGCF will add an identifier in the SIP message, such as adding a header field "Priority: emergency";

[0057] Step 201B, the PSAP initiates a call back to the user from the IP domain. At this time, the PSAP needs to add an identifier in the SIP message, such as adding a header field "Priority: emergency";

[0058] Steps 202-204, af...

Embodiment 2

[0066] The main idea of ​​this embodiment is to add a trigger condition when subscribing to related services. The trigger condition is that the SIP message must not contain a certain identifier, that is, the subscription service will not be triggered when the SIP message contains a certain identifier. When the PSAP calls back, the PSAP or MGCF adds a certain identifier in the SIP message. In this way, when the S-CSCF receives the SIP message carrying the identifier, it will match each trigger condition, but will not trigger related services because it cannot satisfy the trigger conditions that do not include the identifier.

[0067] As shown in the call flow diagram after the modified trigger condition of the present invention in Fig. 5, when the PSAP is located in the GSTN domain, execute 302A-1 and 302A-2, and when the PSAP is located in the IP domain, execute 302B;

[0068] Step 301, add a trigger point in the configuration service that the user does not want to trigger: th...

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Abstract

The present invention provides a method and system for calling, which solves the problem that a configuration service is triggered to cause the increasing of a call putting through time while call back. A specific identification is added in a signaling message; the S-CSCF service calling conversation control function receives the message, and processes the relevant configuration service according to the specific identification; the S-CSCF retransmits the message to finish the call. The S-CSCF processes the relevant configuration service according to the specific identification during the subsequent processing, by using a calling equipment or the specific identification which is added by the MGCF, the configuration service triggering can be avoided, consequently the time of putting through is reduced during calling back by using the identity of the user.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a calling method and system. Background technique [0002] In real life, there are often many emergency situations. Users will use UE (User Equipment) to call PSAP (Public Safety Answering Point) or emergency call center to get help. For convenience, the PSAP in this article includes Both public safety answering points and emergency call centers. Sometimes the PSAP may call the user after the user hangs up, so as to learn more information, and this call of the PSAP is called a callback. [0003] Figure 1 is the framework diagram of the emergency call process. This process only lists several main network elements. P-CSCF is the proxy call session control function of Proxy-Call Session Control Function, and E-CSCF is the emergency call session control function of Emergency-CSCF. Function, S-CSCF is Service-Call SessionControl Function service call session control fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/22H04Q7/38H04W4/16
Inventor 赵鹏
Owner HUAWEI TECH CO LTD
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