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Method and device for continuing call in call control of application server

A technology of application server and call control, which is applied in the field of communication, can solve the problem that the confirmation response call cannot be continued, and achieve the effects of reducing signaling, improving service quality, and avoiding shocks

Inactive Publication Date: 2015-05-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The problem to be solved by the present invention is to provide a method and device for call continuation in application server call control, which can solve the problem in the prior art that the call cannot be continued due to the fact that the second party cannot obtain the confirmation response of the first party's Precondition state The problem

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  • Method and device for continuing call in call control of application server
  • Method and device for continuing call in call control of application server
  • Method and device for continuing call in call control of application server

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Embodiment Construction

[0031] The core idea of ​​the present invention is: according to the conversion condition of the Answer message, it is judged whether it is necessary to convert the Answer message carrying the Precondition state into an Offer message, and if necessary, the converted Offer message is sent, so that the call can be continued, which is beneficial to third-party call control Business development; if it is not needed, intercept the Answer message, which can reduce unnecessary signaling, avoid media negotiation shocks, and improve service quality.

[0032] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0033] One embodiment of the present invention provides a method for call continuation in 3PCC, such as figure 2shown, including:

[0034] The content of 201-205 is similar to that of 101-105, and will not be repeated here.

[0035] 206. The AS receives the Answer message, ...

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PUM

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Abstract

The invention discloses a method for call proceeding in call control of an application server, comprising: the application server sending an Offer message to a second party after making a media negotiation with a first party; the application server receiving an Answer message sent from the second party, and transforming the Answer message into the Offer message and then sending to the first party, wherein, the Offer message carries a confirmation request for a Precondition state of the first party; the application server receiving the Answer message sent from the first party, wherein, the Answer message carries a confirmation response to the Precondition state from the first party; when determining that the Answer message meets a condition for transforming the Answer message, the application server transforming the Answer message into the Offer message and then sending to the second party. The invention discloses an apparatus for call proceeding in call control of an application server. The invention decreases unnecessary signaling, avoids the oscillation of media negotiation and improves quality of service.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for call continuation in call control of an application server. Background technique [0002] Third Party Call Control (3PCC, the Third Party of Conversation Control) means that a third party controller establishes a session between two other parties, and the controller is responsible for media negotiation between the two parties in the session. 3PCC is a very flexible control method, which can be divided into the flow of the 3PCC establishment request message with the Session Description Protocol (SDP, Session Description Protocol) message and the flow process of the 3PCC establishment request message without the SDP message, wherein the SDP message includes providing ( Offer) message and answer (Answer) message. [0003] The flow of 3PCC establishment request message with SDP message exists in various services such as call forwarding, automatic station, and call t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
CPCH04L65/1063H04L65/1093
Inventor 高扬于绪涛
Owner ZTE CORP