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A method for realizing virtual private network in wired digital TV network

A technology of cable digital TV and virtual private network, which is applied in the field of virtual private network, and can solve problems such as inability to communicate with business servers

Inactive Publication Date: 2008-02-13
梅红兵 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all the service servers in the front-end of the cable digital TV network are in the front-end LAN, so the computer terminal with the digital TV receiving card cannot directly communicate with these service servers

Method used

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  • A method for realizing virtual private network in wired digital TV network

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Embodiment Construction

[0012] As shown in Figure 1, the virtual private network includes the Internet, DVB broadband IP routing server, DVB broadband IP gateway server, QAM modulator and cable digital TV network, digital TV receiving card and computer terminal.

[0013] Internet: The Internet consists of various network devices. Devices can communicate with each other through TCP / IP protocol.

[0014] DVB broadband IP routing server: Receive uplink IP packets from computer terminals through IP tunnels. The uplink IP message of the computer terminal is forwarded to the corresponding DVB broadband IP gateway server through the IP tunnel.

[0015] DVB broadband IP gateway server: forwards the uplink IP message of the computer terminal to the front-end LAN of the cable digital TV network. And the downlink IP message returned to the computer terminal is encapsulated into MPEG-2 transport stream by DVB multi-protocol encapsulation data broadcasting technology, and then sent to the QAM modulator.

[001...

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PUM

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Abstract

The invention relates to a virtual private network implementation method on a digital cable television network, which belongs to the digital television art field. The method is to establish a virtual private network with an internet, a DVB broadband IP router server, a DVB broadband IP gateway server, a QAM modulator, a digital cable television network, a digital television receiving card and a computer terminal jointly. The computer terminal sets up an IP tunnel with the DVB broadband IP router server, and transmits an upstream IP message to a local area network at a front end of the digital cable television network through the IP tunnel. The downstream IP message is broadcasted by the DVB broadband IP gateway server and the QAM modulator through a digital cable television network. The digital television receiving card receives MPEG-2 transmission stream,which is encapsulated with the downstream IP message, and transmits to the computer terminal. The downstream IP message adopts a DVB multi-protocol encapsulation data broadcasting art to carry out the encapsulation.

Description

technical field [0001] The invention relates to a method for realizing a virtual private network by using IP tunnel technology to transmit uplink IP messages and DVB multi-protocol encapsulation data broadcasting technology to broadcast downlink IP messages on a cable digital television network. It belongs to the technical field of digital television. Background technique [0002] The cable digital TV network has abundant downlink transmission bandwidth resources, and it uses DVB broadcasting technology to provide digital audio, video and data services for end users. The DVB multi-protocol encapsulated data broadcasting technology can encapsulate the downlink IP packets output by various service servers (such as IP-based video-on-demand servers) in the front end of the cable digital TV network into MPEG-2 transport streams and broadcast them to terminal equipment. [0003] In the terminal equipment of the cable digital TV network, the computer terminal with the digital TV r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04N7/24
Inventor 梅红兵宋宝云
Owner 梅红兵
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