Media stream processing method and system and home gateway

Abstract

The invention provides a media stream processing method and system and a home gateway. The method comprises the following steps that: the home gateway receives a calling request; the home gateway consults with an external network terminal through an SIP (Session Initiation Protocol) to determine a port for both parties to receive media streams; the home gateway specifies a port used for receiving data streams for a first media terminal, establishes an NAT (Network Address Translation) forwarding mapping relation between a port used by the home gateway and a port used by the first media terminal, and transmits the port used by the first media terminal, an IP (Internet Protocol) address of the external network terminal and a port used by the external network terminal to the first media terminal; the home gateway receives incoming call media streams transmitted by the external network terminal and forwards the incoming call media streams to the first media terminal according to the NAT forwarding mapping relation; and the home gateway receives outgoing call media streams transmitted to the external network terminal by the first media terminal and forwards to the external network terminal. By adopting the technical scheme of the invention, a visual telephone service can be realized in a home network or a similar network environment, and various problems existing in the prior art are solved.

Description

technical field [0001] The invention relates to network communication technology, in particular to a media stream processing method, system and home gateway. Background technique [0002] Internet Protocol (Internet Protocol; IP for short) telephony is generally implemented based on Session Initiation Protocol (Session Initiation Protocol; SIP for short). For example: the softswitch network of a telecom operator is a dedicated IP network based on the SIP protocol. This dedicated IP network can support both voice calls and video calls. The realization of the videophone service mainly includes three functions: user interface, communication signaling and media processing. Among them, the videophone terminal is the main equipment in the videophone service, and is the user end equipment used to make and receive the videophone. [0003] At present, there are mainly two implementation methods of videophone. The first implementation mode is a single terminal mode. In this way, t...

AI Technical Summary

Problems solved by technology

Since the terminals in the internal network do not have external network IP addresses, they cannot be directly addressed to the terminals in the internal network from the external network, which leads to the fact that the media stream transmitted based on the RTP protocol cannot be directly sent to the internal network terminals

The existing technology uses a technology called NAT traversal to solve this problem, but NAT traversal is a non-standard and unstable technology that depends on the implementation method of the home gateway, not all home gateways can use the same method Realize crossing

What's more serious is that when both parties of the videophone are in the internal network, an intermediate proxy server must be used to forward the media stream, and this proxy server can easily become a performance bottleneck in the implementation of the videophone

It can be seen that the existing solutions for implementing videophones cannot be well applied to terminals in home networks or similar networks

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