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SDP negotiation method of asymmetrical media parameter

A media parameter, asymmetric technology, applied in the field of network communication, can solve the problems of increasing SDP negotiation redundancy, increasing the communication cost of both parties in the session, and difficulty in media session negotiation, so as to improve signaling efficiency, reduce signaling cost, reduce The effect of redundancy

Active Publication Date: 2016-12-21
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This asymmetric media parameter brings difficulty to media session negotiation
The traditional SDP session negotiation method needs to use media flow direction parameters for negotiation, which increases the redundancy of SDP negotiation and increases the communication cost of both parties in the session.

Method used

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  • SDP negotiation method of asymmetrical media parameter
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Examples

Experimental program
Comparison scheme
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Embodiment 1

[0041] An SDP negotiation method for asymmetric media parameters, such as figure 1 shown, including the following steps:

[0042] In this embodiment, Alice and Bob have a video conversation, Alice uses a mobile phone, can capture 1080p (FHD) video and send it to Bob, but can only play 720p (HD) video stream; Bob uses a TV, can play 1080p video, But only 720p video stream can be captured and sent to Alice, both Alice and Bob use H.265 codec. Both sides of the session support media negotiation using the sending configuration and receiving configuration, but do not support the media capabilities defined for audio and video services.

[0043] Step 1: The sender sends to the receiver an offer carrying the sending configuration and receiving configuration of the sender, and the sending configuration and receiving configuration of the sender carry media parameters for the session conducted by the sender.

[0044] In this embodiment, if the current session service is an audio-video ...

Embodiment 2

[0066] In this embodiment, Alice and Bob have a video conversation, and the capabilities supported by both parties include: codec H.264, codec H.265, frame rate 30 frames per second, frame rate 25 frames per second, resolution 720p, The resolution is 1080p, and each media parameter has a different combination in the corresponding sending configuration and receiving configuration. Both sides of the session support media negotiation using sending configuration and receiving configuration, and support media capabilities defined for audio and video services.

[0067] Step 1: The sender sends to the receiver an offer carrying the sending configuration and receiving configuration of the sender, and the sending configuration and receiving configuration of the sender carry media parameters for the session conducted by the sender.

[0068] In this embodiment, Alice, the sender, represents the media parameters of the session in a configuration list, and assigns a configuration number to...

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Abstract

The invention provides a session description protocol (SDP) negotiation method of an asymmetrical media parameter. The method comprises: a sender sends an offer carrying sending configuration and receiving configuration of the sender to a receiver; the receiver negotiates a media parameter supported by the sender and the receiver according to the sending configuration and receiving configuration of two sides of a session and returns an answer carrying sending configuration and receiving configuration of the receiver after negotiation to the sender; the sender determines a media parameter that is used for sending and receiving according to the received answer, an offer carrying a media parameter after negotiation is sent to the receiver in a unidirectional media stream mode; and the receiver returns an answer carrying the media parameter after negotiation to the sender in a unidirectional media stream mode and determines a media parameter selected by the sender. According to the invention, the selectable sending configuration and receiving configuration that include various media parameters are provided in one offer, so that the utilization rate of the information packet space is improved substantially.

Description

technical field [0001] The invention belongs to the technical field of network communication, and in particular relates to an SDP negotiation method for asymmetric media parameters. Background technique [0002] With the rapid development of the Internet, conversational services occupy an important place in Internet services. Existing conversational services not only require voice interaction between users, but also require the combination and interactive processing of one or more media streams in information content such as video, sound, image, data, and text. In order to enable the two parties in the session to carry out the media session smoothly and ensure that various types of media streams can be transmitted correctly, media parameter negotiation needs to be carried out before the session officially starts. [0003] SDP (Session Description Protocol, Session Description Protocol) is promulgated by IETF (Interne Engineering Task Force) as RFC4566 (RFC2327 is outdated),...

Claims

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Application Information

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IPC IPC(8): H04L29/06
CPCH04L65/1069H04L69/24
Inventor 雷为民王昊昱张伟李浩张松阳
Owner NORTHEASTERN UNIV
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