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Method and device for media consultation in third-party call control

A technology for media negotiation and call control, applied in the field of communication, which can solve the problem of the media connection between the first party and the second party.

Active Publication Date: 2009-12-30
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 media negotiation in third-party call control, which can solve the problem in the prior art that the media of the first party and the second party cannot communicate due to changes in address information

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  • Method and device for media consultation in third-party call control
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  • Method and device for media consultation in third-party call control

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Embodiment Construction

[0040] The core idea of ​​the present invention is that: by transparently transmitting the changed address information, the media planes of the first party and the second party can be connected, which is beneficial to business development. In addition, by setting the threshold number of times for converting Answer messages into Offer messages, when the counted number of times of converting Answer messages into Offer messages reaches the set threshold number, the Answer message is intercepted, which can avoid media negotiation shock and improve service quality.

[0041] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0042] An embodiment of the present invention provides a method for media negotiation in 3PCC, such as figure 2 shown, including:

[0043] The content of 201-204 is similar to that of 101-104, and will not be repeated here.

[0044] 205. The first party ...

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PUM

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Abstract

The invention discloses a method and a device for media consultation in third-party call control and belongs to the field of communication. The method comprises the following steps: carrying out media consultation with a first party; sending an offer message which carries an address message of the first party to a second party; receiving an answer message which is sent by the second party and carries an address message of the second party; converting the answer message into an offer message and sending the offer message to the first party; receiving the answer message which is sent by the first party and carries a changed address message of the first party; and converting the answer message into an offer message and sending the offer message to the second party. The device comprises a consultation module, a first sending module, a first receiving module, a conversion module, a second sending module and a second receiving module. The method and the device can solve the problem that the media interfaces of the first party and the second party are not communicated caused by the change of the address message.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for media negotiation in third-party call control. 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 a flow of a 3PCC establishment request message with a Session Description Protocol (SDP, Session Description Protocol) message and a flow of a 3PCC establishment request message without an SDP message. Wherein, the SDP message includes an offer (Offer) message and an 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 transfer. The specific flow is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
CPCH04M7/003H04L29/06523H04L29/06326H04L65/80H04L65/1069
Inventor 高扬于绪涛
Owner ZTE CORP