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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 problems such as confirming that the response call cannot be continued, and achieve the effects of avoiding media negotiation shock, improving service quality, and reducing signaling

Inactive Publication Date: 2011-03-30
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

[0038] 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.

[0039] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0040] One embodiment of the present invention provides a method for call continuation in 3PCC, such as figure 2 shown, including:

[0041] The content of 201-205 is similar to that of 101-105, and will not be repeated here.

[0042] 206. The AS receives the Answer message,...

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PUM

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Abstract

The invention discloses method and device for continuing call in the call control of an application server and belongs to the field of communication. The method comprises the steps: the application server sends an Offer message to a second party after medium negotiation with a first party; the application server receives an Answer message transmitted by the second party, and sends an Offer message converted from the Answer message to the first part, wherein the Offer message carries a confirm request for a Precondition state of the first party; the application server receives an Answer message transmitted by the first party, wherein the Answer message carries a conform response of the first party to the Precondition state; the application server judges whether the Answer message meets conversion conditions of the Answer message or not; and if the Answer message meets conversion conditions of the Answer message, the application server converts the Answer message to the Offer message and sends to the second party. The technical scheme of the invention enables the call to continue, and is beneficial to the development of third-party call control services.

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 Applications(China)
IPC IPC(8): H04L29/06
CPCH04L29/06312H04L65/1063H04L65/1093H04L29/06374
Inventor 高扬于绪涛
Owner ZTE CORP