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Negotiation method for SDP (session description protocol) of SIP (session initiation protocol) terminal

A terminal and negotiation result technology, applied in electrical components, transmission systems, etc., can solve problems such as difficulty in guaranteeing compatibility, inability to fully utilize the network bandwidth of SIP terminal capabilities, and achieve a good voice communication experience, simple implementation, and strong compatibility. Effect

Inactive Publication Date: 2012-10-03
SHENZHEN GONGJIN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The SDP (Session Description Protocol) session description protocol is used to describe the session information such as the codec (codec) capability in the SIP session, but the negotiation method of the codec capability between the SIP terminals is not included in the SIP / SDP related specifications, different There are different implementations of SIP terminals, and compatibility is difficult to guarantee. Some operators have proposed the negotiation method of calling priority or called priority (each codec gives the corresponding priority), which can solve the compatibility problem to a certain extent, but it often cannot Let the capabilities of SIP terminals and network bandwidth be fully utilized to provide users with a better VOIP experience

Method used

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  • Negotiation method for SDP (session description protocol) of SIP (session initiation protocol) terminal
  • Negotiation method for SDP (session description protocol) of SIP (session initiation protocol) terminal

Examples

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Effect test

Embodiment 1

[0032] Such as figure 1 Shown, a kind of SIP terminal SDP negotiation method is characterized in that, described SIP terminal SDP negotiation method comprises the following steps:

[0033] The SIP terminal SDP negotiation method includes the following steps:

[0034] Step 1: After receiving the SDP information of the calling party, the called SIP terminal determines the priority of the code rate of the negotiation rule, and calculates the code rate of each codec of the calling party and the called party according to the negotiation rule

[0035] Step 2: Select the codec matching group corresponding to the maximum code rate supported by both the calling party and the called party;

[0036] The selected codec matching group is the negotiation result.

[0037] The step 1 includes the following specific steps:

[0038] Step 1.1: The calling SIP terminal establishes a call request, and transmits the SDP information including the codec list of the current calling terminal;

[00...

Embodiment 2

[0057] Such as figure 1 Shown, a kind of SIP terminal SDP negotiation method is characterized in that, described SIP terminal SDP negotiation method comprises the following steps:

[0058] The SIP terminal SDP negotiation method includes the following steps:

[0059] Step 1: After receiving the SDP information of the calling party, the called SIP terminal determines that the negotiation rule is bandwidth priority. Calculate the required bandwidth of each codec of the calling party and the called party according to the negotiation rule.

[0060] Step 2: Select the codec matching group corresponding to the required minimum bandwidth supported by both the calling party and the called party;

[0061] The selected codec matching group is the negotiation result.

[0062] The step 1 includes the following specific steps:

[0063] Step 1.1: The calling SIP terminal establishes a call request, and transmits the SDP information including the codec list of the current calling terminal...

Embodiment 3

[0093] The SIP terminal SDP negotiation method of the present invention, described SIP terminal SDP negotiation method comprises the following steps:

[0094] The SIP terminal SDP negotiation method includes the following steps:

[0095] Step 1: After receiving the SDP information of the calling party, the called SIP terminal determines that the negotiation rule is bandwidth priority, and calculates the required bandwidth or code rate of each codec of the calling party and the called party according to the negotiation rule

[0096] Step 2: Select the codec matching group corresponding to the required minimum bandwidth supported by both the calling party and the called party;

[0097] The selected codec matching group is the negotiation result.

[0098] The step 1 includes the following specific steps:

[0099] Step 1.1: The calling SIP terminal establishes a call request, and transmits the SDP information including the codec list of the current calling terminal;

[0100] St...

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Abstract

The invention discloses a negotiation method for the SDP (session description protocol) of an SIP (session initiation protocol) terminal, aiming to solve the problem of existing negotiation method for the SDP of the SIP terminal that the capability of the SIP terminal and the bandwidth of the network can not be fully utilized and provide high-quality service for users. The negotiation method for the SDP of the SIP terminal comprises the following steps: after the called SIP terminal receives the information of the calling SDP, determining that the negotiation rules give priority to the bandwidth or the code rate, and calculating the bandwidth or code rate needed by the codec of the calling party and the called party according to the negotiation rules; and selecting the codec matching groups which are supported by both the calling party and the called party and meet the requirements, wherein the final negotiation result is used for communication. According to the negotiation method for the SDP of the SIP terminal, the sound quality is guaranteed, the minimal bandwidth is occupied, the best sound quality is obtained under the condition that sufficient bandwidth is available, and high-quality service is provided for the user. The negotiation method for the SDP of the SIP terminal has strong compatibility.

Description

technical field [0001] The invention relates to a SDP negotiation method of a SIP terminal based on network voice communication. Background technique [0002] Voice over Internet Protocol (VoIP for short) terminal, SIP (Session Initiation Protocol) is the session initiation protocol; Codec (Coder and Decoder) codec. [0003] Bit rate: used to indicate the number of bits required for encoded or compressed audio data per second. [0004] Bandwidth: The amount of data that a single network can transmit per unit of time. [0005] The SDP (Session Description Protocol) session description protocol is used to describe the session information such as the codec (codec) capability in the SIP session, but the negotiation method of the codec capability between the SIP terminals is not included in the SIP / SDP related specifications, different There are different implementations of SIP terminals, and compatibility is difficult to guarantee. Some operators have proposed the negotiation ...

Claims

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Application Information

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IPC IPC(8): H04L29/06
Inventor 王水权韦干翼刘乐安肖青平
Owner SHENZHEN GONGJIN ELECTRONICS CO LTD
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