KR20040108256A - Optical transmission system for broadcasting/communication converged services - Google Patents

Abstract

PURPOSE: A transmission system for fusing broadcasting/communication signals is provided to transmit data communication and CATV(Cable Television) broadcasting signals using a single optical cable and reduce facility cost. CONSTITUTION: An ethernet exchange unit(20) receives downward optical signals(a1) for data communication through internet(10). A broadcasting/communication signals optical fusion unit(40) receives and fuses both the downward optical signals from the ethernet exchange unit and optical signals for CATV broadcasting(b1) inputted through a CATV net(30). Each of a plurality of broadcasting/communication signals optical division units(70a,70b,...,70n) divides the fused optical signals(a1+b1) into the downward optical signals and the optical signals for CATV broadcasting, and outputs the optical signals for CATV broadcasting to a television receiver(50) and downward optical signals to the personal computers through an ethernet terminal unit(60). Herein, upward optical signals(a2) for data communication inputted from the personal computers are transmitted to the internet through the ethernet terminal units, the broadcasting/communication signals optical division units, broadcasting/communication signals optical fusion unit, and the ethernet exchange unit.

Description

Transmission system for broadcasting / communication signal fusion {OPTICAL TRANSMISSION SYSTEM FOR BROADCASTING / COMMUNICATION CONVERGED SERVICES}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transmission system for broadcast / communication convergence service, and more particularly, to an optical transmission system for broadcast / communication convergence service capable of communicating CATV (Cable Television) broadcast signals at the same time.

The data communication service system and the CATV broadcasting service system which are conventionally used are separated. The data communication service system is composed of an optical Ethernet aggregation switch and a terminal switch through an optical Ethernet network, and the system for a CATV broadcasting service is a head end and a HFC (Hybrid Fiber Coaxial) optical network unit (HU) through a CATV network. And the like.

That is, in the related art, each of the Internet communication cable and the CATV broadcasting optical cable is received by the Ethernet exchange unit and the HFC ONU, respectively, and is divided into a plurality of channels (multiple strands) in the Ethernet exchange unit to connect the communication optical cable to each home, and at the same time, the CATV broadcasting optical cable The broadcast signal was received from HFC ONU, converted to coaxial cable signal, and drawn in parallel to each home.

Recently, a FTTH (Fiber To The Home) based broadcasting / communication convergence service that can be easily implemented while making the most of the optical Ethernet network and the CATVAKD infrastructure that has been used conventionally is desired.

For example, such a building application of the prior art building, the management offices such as buildings, apartments, etc., because the communication optical cable, CATV coaxial cable and a plurality of CATV amplifiers must be installed separately, so that the structure is complicated, and the equipment cost increases. There was a problem.

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide an optical transmission system for broadcast / communication convergence service that can transmit data communication and CATV broadcasting using one optical cable.

An object of the present invention is to provide an optical transmission system for a broadcast / communication convergence service that can reduce the cost of equipment for data communication and CATV broadcasting.

An object of the present invention is to provide an optical transmission system for a broadcast / communication convergence service with a simple structure.

In order to achieve the above object, the present invention provides an Ethernet exchange unit for receiving a downlink optical signal for data communication through the Internet and outputting an uplink optical signal for data communication input from a first to n-th personal computer to the Internet; Receive the downlink optical signal for data communication output from the Ethernet exchange unit, receive the CATV broadcasting optical signal input through the CATV broadcasting network, distribute it to n through the optical splitter, and then distribute the downlink optical signal for the data communication and the optical signal for CATV broadcasting Receiving the broadcast / communication optical convergence signal and the downlink broadcast / communication optical convergence signal outputted from the broadcast / communication signal optical fusion unit, and separating the CATV broadcasting optical signal and the downlink optical signal for data communication to separate the CATV broadcasting optical signal. Output to a television receiver via a photoelectric converter and further downlink optical signal for data communication Output to the first to n-th personal computer via an Ethernet terminal and at the same time receive the upstream data input from the first to n-th personal computer through the Ethernet terminal to the broadcast / communication signal optical fusion unit for the data communication And a plurality of broadcast / communication signal optical separators for outputting optical signals.

1 is a block diagram of an optical transmission system for broadcast / communication convergence service according to an embodiment of the present invention;

2 is a detailed circuit diagram of a broadcast / communication optical fusion machine in an optical transmission system for broadcast / communication convergence service according to an embodiment of the present invention;

3 is a detailed circuit diagram of a broadcast / communication optical splitter in an optical transmission system for broadcast / communication convergence service according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: Internet 20: Ethernet exchange unit

30: CATV broadcasting network 40: Broadcast / communication signal optical fusion machine

42: Passive optical splitter 44a, 44b ... 44n: Optical wavelength multiplexer

50: television set 60: Ethernet terminal

70a, 70b ... 70n: broadcast / communication signal optical separator

72: light wavelength separator 74: photoelectric converter

PC1, PC2, ... PCn: Personal computer

Hereinafter, an optical transmission system for a broadcast / communication convergence service according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of an optical transmission system for broadcast / communication convergence service according to an embodiment of the present invention, and FIG. 2 is a broadcast / communication system for an optical transmission system for broadcast / communication convergence service according to an embodiment of the present invention. Fig. 3 is a detailed circuit diagram of a communication signal optical fusion machine, and Fig. 3 is a detailed circuit diagram of a broadcast / communication optical separator in the optical transmission system for broadcasting / communication convergence service according to an embodiment of the present invention.

1 to 3, the optical transmission system for broadcast / communication convergence service according to an embodiment of the present invention receives a downlink optical signal a1 for data communication via the Internet 10 and at the same time, an Ethernet terminal ( Receiving the Ethernet exchange unit 20 for outputting the uplink optical signal a2 for data communication transmitted from the 60 to the Internet 10, and the downlink optical signal a1 for data communication output from the Ethernet exchange unit 20; At the same time, the broadcast / communication signal optical fusion unit 40 which receives the CATV broadcasting optical signal b1 inputted through the CATV broadcasting network 30 and fuses the downlink optical signal a1 for data communication and the CATV broadcasting optical signal b1. ) And a CATV broadcasting optical signal b1 and a downlink optical signal a1 for data communication are received by receiving the downstream broadcasting / communication optical fusion signal a1 + b1 output from the broadcasting / communication signal optical fusion unit 40. Photoelectric conversion of the optical signal b1 for CATV broadcasting Outputting to the revision receiver 50, and outputting the downlink optical signal a1 for data communication to the first to nth personal computers PC1, PC2, ..., PCn via the Ethernet terminal 60, Receiving data input from the first to n-th personal computers (PC1, PC2, ... PCn) through the Ethernet terminal 60 to the broadcast / communication signal optical fusion unit 40, the uplink optical signal for data communication A plurality of broadcast / communication signal optical separators 70a, 70b, ... 70n for outputting (a2) are provided.

The broadcast / communication signal optical fusion unit 40 receives a CATV broadcasting optical signal b1 inputted through the CATV broadcasting network 30 and receives a passive optical splitter 42 for distributing the signal to n channels, and the passive optical splitter ( Receiving each of the CATV broadcasting optical signals b1 distributed in 42) and receiving the downlink optical signal a1 for data communication output from the Ethernet switching unit 20, these downlink optical signals a1 and CATV broadcasting for data communication are received. First to nth to output the fused broadcast / communication optical fusion signals a1 + b1 to the plurality of broadcast / communication signal optical splitters 70a, 70b, ... 70n, respectively, by fusing the optical signals b1. Optical wavelength multiplexers 44a and 44b.

The broadcast / communication signal optical splitters 70a, 70b,... 70n receive the downlink broadcast / communication optical fusion signal a1 + b1 output from the broadcast / communication signal optical fusion unit 40 and receive the CATV broadcast optical signal. (b1) and the downlink optical signal a1 for data communication are separated, and the first to nth personal computers PC1, PC2, ... PCn are transmitted through the Ethernet terminal 60. And a photo receiver for photoelectric conversion by receiving the optical wavelength separator 72 for outputting the CATV broadcasting optical signal b1 and the CATV broadcasting optical signal b1 separated and output from the optical wavelength separator 72. The photoelectric converter 74 outputs to 50 is comprised.

Next, the operation and effect of the optical transmission system for broadcast / communication convergence service according to the embodiment of the present invention configured as described above will be described.

First, the CATV broadcasting optical signal b1 inputted through the CATV broadcasting network 30 is received by the passive optical splitter 42 of the broadcasting / communication signal optical fuser 40 and the CATV broadcasting optical signal b1 is distributed. And a plurality of optical wavelength multiplexers 44, and a plurality of optical wavelength multiplexers 44 of the broadcast / communication signal optical combiner 40 includes a passive optical splitter of the broadcast / communication signal optical fuser 40. The CATV broadcast signal b1 distributed in 42 and the downlink optical signal a1 for data communication output from the Ethernet exchange unit 20 are respectively received and converged into the downlink broadcast / communication optical convergence signal a1 + b1.

The downlink broadcast / communication optical fusion signal a1 + b1 output from the broadcast / communication signal optical fusion unit 40 is an optical wavelength separator of a plurality of broadcast / communication signal optical separators 70a, 70b,. 72, respectively, divided into a CATV broadcasting optical signal b1 and a data communication downlink optical signal a1, and outputs the CATV broadcasting optical signal b1 to the television receiver 50, and further, the downlink optical signal for data communication ( a1) can be outputted to the first to nth personal computers PC1, PC2, ... PCn via the Ethernet terminal 60 to perform data communication.

On the other hand, the data input from the first to n-th personal computers (PC1, PC2, ...) are transmitted through the Ethernet terminal 60 to the plurality of broadcast / communication signal optical separators 70a, 70b, ... 70n) through the broadcast / communication signal optical fusion unit 40 and the Ethernet exchange unit 20, and outputted upward to the Internet 10, thereby enabling internet communication.

The optical transmission system for broadcasting / communication convergence service of the present invention configured as described above can transmit data communication and CATV broadcasting using a single optical cable, thereby not only reducing equipment cost for data communication and CATV broadcasting, but also structure Is very simple, further reducing the cost of the installation.

In the above description, the specific embodiments have been shown and described, but the present invention is not limited thereto, for example, by those skilled in the art without departing from the concept of the present invention. Of course, the design can be changed in various ways.

As described above, according to the optical transmission system for broadcasting / communication convergence service of the present invention, the downlink optical signal for data communication is received through the Internet, and the upstream data input from the first to n-th personal computers is output to the Internet. A broadcast that receives an Ethernet exchange unit and a downlink optical signal for data communication output from the Ethernet exchange unit, receives a CATV broadcast optical signal input through a CATV broadcasting network, and fuses the downlink optical signal for data communication and the CATV broadcast optical signal. Receives a downlink broadcasting / communication optical fusion signal output from the communication signal optical fusion unit and the broadcasting / communication signal optical fusion unit, and separates the CATV broadcasting optical signal and the downlink optical signal for data communication to separate the CATV broadcasting signal for the CATV broadcasting Photoelectric conversion of an optical signal and output to a television receiver; While outputting the downlink optical signal to the first to n-th personal computers through an Ethernet terminal, the data input from the first to n-th personal computers are received through the Ethernet terminal to the broadcast / communication signal optical fusion device. Since a plurality of broadcast / communication signal optical separators outputting the uplink optical signal for data communication are provided, data communication and CATV broadcasting can be transmitted using a single optical cable, and the cost of data communication and CATV broadcasting equipment can be reduced. In addition, there is an excellent effect that the structure is simple.

Claims (3)

The downlink optical signal a1 for data communication is received via the Internet 10, and the uplink optical signal a2 for data communication input from the first to nth personal computers PC1, PC2, ... PCn is connected to the Internet. CATV broadcast optical signal received through the Ethernet exchange unit 20 and the downlink optical signal a1 for data communication output from the Ethernet exchange unit 20 and input through the CATV broadcast network 30. a broadcast / communication signal optical fusion unit 40 which receives (b1) and fuses the downlink optical signal a1 for data communication and the optical signal b1 for CATV broadcasting, and outputs it from the broadcast / communication signal optical fusion unit 40 The CATV broadcasting optical signal b1 is separated from the CATV broadcasting optical signal b1 and the data communication downlink optical signal a1 by receiving the broadcasting / communication optical convergence signal a1 + b1. And outputs the downlink optical signal a1 for data communication to the Ethernet terminal 60. Upstream optical data for data communication inputted to the first to n-th personal computers PC1, PC2, ..., and PCn and input from the first to n-th personal computers PC1, PC2, ..., PCn. A plurality of broadcast / communication signal optical splitters 70a and 70b that receive a signal a2 through the Ethernet terminal 60 and output the uplink optical signal a2 for data communication to the broadcast / communication signal optical fusion unit 40. And ... 70n). A transmission system for broadcasting / communication signal fusion, characterized in that it is provided. According to claim 1, The broadcast / communication signal optical fusion unit 40 is a passive optical splitter 42 for receiving the CATV broadcasting optical signal (b1) input through the CATV broadcasting network 30 and distributes it as an optical signal, Receiving the CATV broadcast optical signal b1 distributed by the passive optical splitter 42, respectively, and receiving the downlink optical signal a1 for data communication outputted from the Ethernet switching unit 20, these downlink optical signals for data communication ( a1) and a CATV broadcast optical signal b1 are fused to output the fused broadcast / communication signal optical fusion signal a1 + b1 to the plurality of broadcast / communication signal optical splitters 70a, 70b, ... 70n, respectively. And a first to n-th optical wavelength multiplexers (44a, 44b, ... 44n). 2. The broadcast / communication optical convergence signal a1 + b1 of claim 1, wherein the broadcast / communication signal optical splitters 70a, 70b, ... 70n are output from the broadcast / communication signal optical fusion unit 40. And the CATV broadcasting over signal b1 and the downlink optical signal a1 for data communication are separated, and the downlink optical signal a1 for data communication is transmitted through the Ethernet terminal 60 to the first to nth personal computers PC1, An optical wavelength separator 72 for outputting to the PC2, PCn, and outputting the CATV broadcasting optical signal b1, and the CATV broadcasting optical signal b1 separated and output from the optical wavelength separator 72; And a photoelectric converter (74) for receiving the photoelectric conversion and outputting the photoelectric converter to the television receiver (50).