KR980007666A - Integrated cable broadcasting network - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CATV network that transmits video services such as satellite broadcasting, CATV, airwave broadcasting, VOD, and communication services such as voice telephony to subscriber premises. The data transmission method used in the conventional digital CATV network is registered. Due to the transmission method, it was difficult to accommodate multimedia services requiring various bitrates and variable bandwidth settings.The CATV network is configured as an ATM network structure, and only when data transmission is required after converting service data into 53-byte cells. The solution was solved by using an ATM transmission method.

Description

Integrated cable broadcasting network

As this is a public information case, the full text was not included.

1 is a block diagram of the present invention.

Claims (6)

In CATV network, it receives over-the-air broadcasting, external cable TV broadcasting, analog and digital satellite broadcasting to be transmitted to subscribers, and stores data for self broadcasting and VOD service in headend 1, A headend 1 for converting to an ATM cell for transmission to a telephone station apparatus 2; A telephone station apparatus 2 for transmitting data transmitted from the headend 1 to the RT 3 and transmitting / receiving basic information necessary for subscriber management; An RT 3 for outputting data transmitted from the telephone station apparatus 2 to a port corresponding to a subscriber requesting service, and for modulating / demodulating data; And a STB (4) for transmitting data transmitted from the network to the service terminal and transmitting data transmitted from the service terminal to the network. 2. A service container (11) according to claim 1, wherein the headend (1) receives an analog or digital TV signal and transmits it to the moving picture real time encoder (12), and the signal transmitted from the service container (11) to the moving picture real. A video real-time encoder 12 for time encoding processing and transmitting to the ATM multiplexer 13 and a signal transmitted from the video real-time encoder 12 are converted into an asynchronous transmission mode cell of 53 bytes to the telephone station apparatus 2. An ATM multiplexer 13 which transmits and transmits subscriber related information transmitted from the video real-time encoder 12 and the telephone station apparatus 2 to the subscriber management system 14, and a subscriber input through the ATM multiplexer 13; Subscriber management system 14 for subscriber management and control based on the related information, the video server 15 in which data corresponding to the VOD service is embedded, and the input / output of the video server 15 are controlled. CATV network characterized by consisting of a level 2 gateway (16). 2. The telephone station apparatus 2 according to claim 1, wherein the telephone station apparatus 2 comprises two ATM switches, voices, etc. to interface the asynchronous transmission mode data received from the headend 1 with the remote second and third central station apparatus. Public network interface 22 for interfacing communication service data with public network, Level 1 gateway 24 for efficiently allocating network support to provide services to subscribers, and matching, billing, OAM (25) for measurement and statistics, data management, program change, loading, and interface with a remote operation management center, and a system reference clock (26) for supplying a reference clock to an ATM switch for each node. Featuring CATV network. The method of claim 1, RT (3) is an ATM switch for efficiently using a transmission band according to the number of subscribers, and an modulation / demodulation unit for interfacing to transmit / receive up / down data with subscribers at a predetermined distance through copper wire and coaxial. CATV network, characterized in that consisting of (32). 2. The STB 4 divides the transmission / reception data according to the type of service such as a TV, a computer, a telephone, and the like in which a transmission / reception interface with an RT 3 and a cell in an asynchronous transmission mode are installed in an existing subscriber's house. CAT 41, characterized in that consisting of a conversion unit 42 for converting the digital data transmitted and received from the NIC (41) to analog data. In the VOD service method in the integrated cable broadcasting network, the VOD service related signals required from the STB 4 installed in the subscriber's premises are transmitted through a level 1 gateway (via the third ATM switch 31 and the second ATM switch 23). 24) after negotiating the program type, billing and service start, etc., the first ATM switch 21 is used to reach the level 2 gateway 16, and the video server 15 is adapted to comply with the relative fixed access service scheme. The virtual path identifier / virtual channel identifier is assigned to the number of program identifiers for the simultaneously serviceable VOD stream between the first ATM switch 21 and the first ATM switch 21, and the program identifier and subscriber number related to the VOD service reaching the level 2 gateway 16 are assigned. The level 2 gateway 16 determines from the level 1 gateway 24 whether it is a request signal from which switch of the second ATM switches, and each second ATM switch is determined. The virtual path identifier / virtual channel identifier of the first ATM switch 21 is determined by the addition of the VOD service request order value in the value 23 and the pre-fixed value of each second ATM switch 23, and the selected program identifier. Is transmitted to each of the second ATM switches 23 via the first ATM switch 21 according to the virtual path identifier / virtual channel identifier of the first ATM switch 21 determined from the video server 15. How to service VOD in CATV.