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An sdp negotiation method for asymmetric media parameters

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

Active Publication Date: 2019-04-26
NORTHEASTERN UNIV LIAONING
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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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  • An sdp negotiation method for asymmetric media parameters
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Examples

Experimental program
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Embodiment 1

[0040] An SDP negotiation method for asymmetric media parameters, such as figure 1 shown, including the following steps:

[0041] 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.

[0042] 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.

[0043] In this embodiment, if the current session service is an audio-video ...

Embodiment 2

[0065] 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.

[0066] 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.

[0067] 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 present invention provides an SDP negotiation method for asymmetric media parameters. The method is as follows: the sender sends an offer carrying the sender's sending configuration and receiving configuration to the receiving party; the receiving party negotiates the sending according to the sending configuration and receiving configuration of both parties in the session. The media parameters supported by the sender and the receiver are sent back to the sender with an answer carrying the receiver's negotiated sending configuration and receiving configuration; the sender confirms the media parameters used in sending and receiving based on the received answer, and uses a one-way media stream. Send an offer carrying the negotiated coal parameters to the receiver; the receiver sends back an answer carrying the negotiated coal parameters to the sender in the form of a one-way media stream to confirm the media parameters selected by the sender. The invention provides optional sending configuration and receiving configuration containing multiple media parameters in one offer, greatly improving the utilization of information packet space.

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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Patent Type & Authority Patents(China)
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 LIAONING
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