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Method for multimedia terminal point-to-point call inside two private networks

A multimedia terminal, point-to-point technology, applied in the field of multimedia communication, can solve problems such as inability to traverse intercommunication, and achieve the effects of improving interoperability, facilitating deployment, and facilitating maintenance

Active Publication Date: 2008-07-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the call process cannot pass through the NAT devices of the two private networks to achieve intercommunication when the H.323 terminals in the two private networks communicate, and proposes a point-to-point calling method for multimedia terminals in the two private networks. method

Method used

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  • Method for multimedia terminal point-to-point call inside two private networks
  • Method for multimedia terminal point-to-point call inside two private networks
  • Method for multimedia terminal point-to-point call inside two private networks

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Embodiment Construction

[0024] The implementation steps of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] figure 1 It is a schematic diagram of the application network topology structure of the method proposed by the present invention. The realization of the present invention mainly involves the following equipment: H.323 terminal, NAT equipment, multimedia gateway and gatekeeper. Such as figure 1 As shown, terminal A and terminal B are in different private networks, and terminal A and terminal B communicate with the public network through a NAT device to convert the private network address of the terminal information into a public network address. The gatekeeper of the public network implements terminal management, and the multimedia gateway implements signaling and media transfer between private network terminals.

[0026] figure 2 It is a signaling flowchart of a point-to-point call between multimedia terminals in two private netw...

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Abstract

Providing a method for point-to-point calling between two multimedia terminals in the private network, by adding a multimedia gateway device to the public network, point-to-point calling between private terminals is replaced with calling the multimedia gateway, then establishes H.245 channel of H.323 protocol to the private terminals respectively by the multimedia gateway device, then performing capability alternation, principal and subordinate determination, and establishing of logic channel, at last transmits the information of the two private terminals by the multimedia gateway device thereby it is achieved that point-to-point calling between two multimedia terminals in the private network. The whole process of transferring is lucidity for users according to the method f this invention, it is unnecessary for users to know any information of the network structure, so it is convenient and simple; the method provided by this invention is capable of supporting any NAT type.

Description

technical field [0001] The invention relates to multimedia communication, in particular to a point-to-point call method for multimedia terminals in two private networks based on the H.323 protocol. Background technique [0002] With the vigorous development of IP network broadband services in recent years, the packet-based multimedia communication system standard H.323 (a packet network multimedia communication standard formulated by the International Telecommunication Union) is widely used in video conferencing and IP telephony. Since many users usually go through NAT (Network Address Translation, see IETF RFC3489) when accessing the public network, private IP addresses are used internally, and address translation is generally performed through NAT devices when accessing the public network. However, the H.323 protocol itself does not consider the application of NAT. Its address embedding feature conflicts with the NAT device, resulting in the problem of internal and externa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/28H04L29/06H04L12/66
CPCH04L29/12009H04L29/12537H04L65/1069H04L61/2578H04L29/06204H04L29/125H04L65/1009H04L29/06326H04L29/06027H04L61/2564H04L61/00H04L65/1106H04L65/1101H04L69/00H04L61/25
Inventor 李加曹珈柴亚伟靳自鸣刘成刚
Owner ZTE CORP
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