IP network and cable television network merged access method and equipment

A cable television network and cable television network technology, applied in the direction of data exchange network, electrical components, data exchange through path configuration, etc., can solve the problems of not supporting backhaul lines, high cost of two-way transformation, achieve practical economic benefits, avoid The effect of high fees

CN1668037AInactive Publication Date: 2005-09-14ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2005-09-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention disclose an access method for combing IP network and wire TV network including a protocol stack comprising a physical layer, a data link layer, a network layer, a transmission layer and an applied layer to realize forward of IP / DVB multicast data from wire TV network to LAN and help the LAN users to receive the IP / DVB multicast data transferred by the wire TV network and access external IP network and interact with far distance servers to form an interaction loop. A device is disclosed containing a multicast route forward process module and a network address conversion process module and three interfaces, one is connected with the wire TV network receiving downstream IP / DVB multicast data, the other interface is connected with the external IP network and the third one is connected with the internal LAN.
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Description

technical field

[0001] The present invention relates to a computer network access method and equipment, in particular to a routing access method combining IP network and cable TV network and equipment for realizing the method. Background technique

[0002] At present, the pure IP network does not support multicast inherently, but multicast has natural advantages for large-capacity multimedia data transmission. The cable TV network is a natural broadcasting network, and it is relatively easy to provide users with multicast services through the cable TV network. From the perspective of broadband, the cable TV network can also meet the needs of multimedia services. IP Over DVB technology can be used to transmit IP through the cable TV network, so the scheme of transmitting large-capacity multimedia data on the cable TV network can be adopted. However, the domestic cable TV network does not support the return line, so if a pure cable TV network is used for broadband transmissio...

Examples

Embodiment Construction

[0023] The network topology structure diagram implemented by the access method of the present invention is shown in FIG. 1 . The internal LAN (6) is provided with an access device (3), and the LAN (4) supports multicast transmission. The RF interface of the access device (3) is connected to a cable television network (CATV) (2), and its external IP network interface is connected to an external IP network (such as the Internet) (7). Through the access device (3), the internal local area network user (5) can receive data sent by the remote server group (1), and at the same time realize interaction with the remote server group (1).

[0024] The present invention adopts a protocol stack that combines DVB data and IP data through the method shown in FIG. 2 . The structure of the protocol stack is:

[0025] 1. Physical layer: provide interconnection equipment for data communication. The physical layer includes the RF interface connected to the cable television network and the ordi...