KR20010067557A - Cable modem device in Communication system through network of cable television - Google Patents

Cable modem device in Communication system through network of cable television Download PDF

Info

Publication number
KR20010067557A
KR20010067557A KR1020010006341A KR20010006341A KR20010067557A KR 20010067557 A KR20010067557 A KR 20010067557A KR 1020010006341 A KR1020010006341 A KR 1020010006341A KR 20010006341 A KR20010006341 A KR 20010006341A KR 20010067557 A KR20010067557 A KR 20010067557A
Authority
KR
South Korea
Prior art keywords
circuit
cable
transmission
cable television
data
Prior art date
Application number
KR1020010006341A
Other languages
Korean (ko)
Inventor
이일태
Original Assignee
이일태
이일정보통신(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이일태, 이일정보통신(주) filed Critical 이일태
Priority to KR1020010006341A priority Critical patent/KR20010067557A/en
Publication of KR20010067557A publication Critical patent/KR20010067557A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0659—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0002—Modulated-carrier systems analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6168—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving cable transmission, e.g. using a cable modem

Abstract

PURPOSE: A cable modem device in a communication system using a cable TV transport network is provided to eliminate any adverse effect to the operation of the system by automatically stopping the transmission output of the terminal at an abnormal transmission state. CONSTITUTION: A cable modem device(100) is installed between a cable TV line(200) and PC(300) on recipient side, modulating the data from the PC(300) and transmitting it to the recipient side through the cable TV line(200) while demodulating the data transmitted and sending it to PC(300) on the transmitter side. The cable modem device(100) has a mixed divider(111) connected to the cable TV line(200), a receiving RF circuit(112), a transmitting RF circuit(113), an LAN interface circuit(114) on PC side, an RF transmission status detecting circuit(115), an RF receipt status detecting circuit(116), and a micro computer(117) as a controller.

Description

케이블텔레비젼 전송망을 이용한 통신시스템에서의 케이블모뎀장치{Cable modem device in Communication system through network of cable television}Cable modem device in communication system using cable television transmission network

본 발명은 케이블텔레비젼회선을 이용한 수신측의 데이터 통신기기(PC)와 송신측의 센터와의 쌍방향 통신을 행하는 케이블텔레비젼통신 시스템에 있어서, 수신측에서 데이터 통신기기로부터 데이터를 변조하여 케이블텔레비젼회선을 통해 송신측으로 전송할 때 데이터의 송신상태가 정상인지 아닌지를 체크하여 이상이 있는 것으로 판정될 경우 케이블텔레비젼회선에 접속된 다른 정상의 케이블 모뎀에 악영향을 주지 않도록 하는 케이블 모뎀 장치에 관한 것이다.The present invention provides a cable television communication system for performing two-way communication between a data communication device (PC) on a receiving side and a center on a sending side using a cable television line, wherein the receiving side modulates data from the data communication device to establish a cable television line. The present invention relates to a cable modem apparatus which checks whether or not the data transmission state is normal when transmitting to the transmitting side through the transmission side so as not to adversely affect other normal cable modems connected to the cable television line.

알려진 바와 같이, 케이블텔레비젼 통신 시스템은 케이블텔레비젼 전송선로를 이용한 쌍방향의 데이터 전송의 방식으로 개발된 시스템으로서 비디오 온디멘드(VOD) 등의 서비스에 응용되고 있고, 케이블텔레비젼회선은 전화회선에 비하여 대용량의 데이터 전송 가능력을 가지고 있음에 따라, 이 회선을 이용하여 네트워크를 구성하고, 예컨데, 인터넷 등에 가입자 단말의 퍼스널 컴퓨터(이하 PC)로부터 고속으로 악세스할 수 있는 데이터 통신 서비스가 개발되어 있다.As is known, a cable television communication system is a system developed by a two-way data transmission method using a cable television transmission line, and is applied to a service such as video on demand (VOD). A cable television line has a larger capacity than a telephone line. With the ability to transmit data, a data communication service has been developed that can form a network using this line and can be accessed at high speed from a personal computer (hereinafter referred to as a PC) of a subscriber terminal, for example, on the Internet.

이러한 서비스에는 가입자 댁에 케이블 모뎀장치라는 케이블텔레비젼회선과 네트워크회선과의 인터페이스 단말장치가 설치되고, 케이블 모뎀장치에 예컨데, PC가 접속되어 있다. 이와 같은 상태에서 가입자는 초고속 인터넷 등의 서비스를가능하게 된다. 케이블 모뎀장치와 PC 사이에는 예컨데, IEEE802. 3 규격과 호환성 있는 이더넷방식을 이용함으로써, 10Mbps의 전송용량이 용이하게 실현된다.In such a service, an interface terminal device between a cable television line and a network line, which is called a cable modem device, is installed in a subscriber's house, and a PC is connected to the cable modem device, for example. In this state, the subscriber is able to provide services such as high-speed Internet. Between the cable modem device and the PC, for example, IEEE802. By using the Ethernet system compatible with the 3 standards, a transmission capacity of 10 Mbps is easily realized.

종래 케이블 모뎀 장치를 포함한 케이블텔레비젼방송 시스템은 도2에 도시한 바와 같이, 케이블텔레비젼 방송센터(10)와 가입자 단말(20)로 이루어지며, 방송센터(10)는 영상공급장치(11)와 외부 네트워크(12)를 접속하는 서버장치(13)와, 이 서버장치(1)에 접속된 신호변환회로(14)와, 영상공급장치(11)로부터 변조된 영상신호와 신호변환회로(14)로부터의 변조된 데이터 신호를 혼합 또는 케이블텔레비젼회선(15)으로부터 혼합된 영상신호와 데이트 신호를 분기하는 혼합 분기회로(16)로 구성되어 있다.As shown in FIG. 2, a cable television broadcasting system including a conventional cable modem device is composed of a cable television broadcasting center 10 and a subscriber station 20, and the broadcasting center 10 includes an image supply device 11 and an external device. From the server device 13 connecting the network 12, the signal conversion circuit 14 connected to the server device 1, and the video signal and signal conversion circuit 14 modulated from the video supply device 11; And a mixed branch circuit (16) for branching the modulated data signal of the mixed or mixed video and data signals from the cable television line (15).

가입자 단말(20)은 케이블텔레비젼회선(15)에 의해 전송되는 방송신호를 케이블텔레비젼 홈터미널(21)에서 선국처리 및 복조처리 등을 행한 후 텔레비젼 수신기(23)로서 재생되는 부분과 케이블텔레비젼 회선(15)에 의해 전송되어온 데이타 신호를 처리하기 위한 케이블 모뎀 장치(22)로서 이루어져 있다. 따라서, 방송센터(10)에 의해 케이블텔레비젼회선(15)을 통하여 전송되어 내려간 신호는 케이블 모뎀장치(22)에 의해 복조 처리된 후 케이블 모뎀용의 제어데이터가 취출되며, 이때 접속된 데이터 통신기기로 사용되어지는 PC(30)에 필요한 데이터가 공급된다. 케이블 모뎀장치(22)와 PC(30) 사이의 케이블(24)에는 이더넷 방식의 10BASE-T를 기반으로 한 전송용량 10Mbps의 튀스트페어 케이블이 이용된다.The subscriber station 20 performs the tuning and demodulation processing of the broadcast signal transmitted by the cable television line 15 at the cable television home terminal 21, and the portion reproduced as the television receiver 23 and the cable television line ( And a cable modem device 22 for processing the data signal transmitted by 15). Therefore, the signal transmitted and transmitted by the broadcasting center 10 through the cable television line 15 is demodulated by the cable modem device 22, and then control data for the cable modem is taken out. Data necessary for the PC 30 to be used is supplied. The cable 24 between the cable modem device 22 and the PC 30 uses a 10 Mbps thick pair cable having a transmission capacity of 10 Mbps based on the Ethernet-based 10BASE-T.

한편, PC(30)에 의해 송출되어 올라간 상향 데이터는 케이블 모뎀장치(22)에 의해 변조 처리되고, 올라간 상향 신호는 케이블텔레비젼회선(15)을 통하여 방송센터(10)에 송출되어진다.On the other hand, the upstream data transmitted by the PC 30 is modulated by the cable modem device 22, and the upstream signal is transmitted to the broadcasting center 10 through the cable television line 15.

이와 같은 시스템은 케이블텔레비젼 홈 터미널(21)에 의해 방송센터(10)로부터의 방송수신신호가 없고, 각 단말의 케이블 모뎀장치(22)로부터 적극적으로 방송센터(10)측으로 송신을 행할 수 있는 조건을 구비하고 있지 못하다. 따라서, 케이블텔레비젼 통신 시스템에 접속되어 있는 단말에 고장이 발생하여 연속송신이 안될 경우 케이블텔레비젼 시스템에 접속된 다른 정상의 단말 송신 데이터도 파괴되어지며, 결국 시스템의 운영에 중대한 악영향을 미치게 된다.In such a system, there is no broadcast reception signal from the broadcasting center 10 by the cable television home terminal 21, and a condition under which the cable modem device 22 of each terminal can actively transmit to the broadcasting center 10 side. Not equipped with Therefore, if the terminal connected to the cable television communication system fails and continuous transmission is not possible, other normal terminal transmission data connected to the cable television system is also destroyed, which has a significant adverse effect on the operation of the system.

본 발명은 이상 송신상태 등 단말의 송신출력을 자동적으로 정지시켜 시스템 운영에 악영향을 배제할 수 있게 하는 것으로, 수신측에 있어서 케이블텔레비젼 회선과 데이터 통신기기(PC)와의 사이에 설치되고, PC로부터의 데이터를 변조하여 케이블텔레비젼회선을 통하여 수신측에 전송하는 한편, 송신측에서 변조되고 케이블텔레비젼회선을 통하여 전송된 데이터를 복조하여 PC에 전송하는 케이블 모뎀장치에 있어서, PC로부터 출력된 데이터를 PC측에 인터페이스를 통하여 수신하고, 변조시켜 케이블텔레비젼회선에 송출하는 송신수단과, 상기 송신수단의 송신동작 상태를 검출하는 제1 검출수단과, 상기 PC측 인터페이스의 데이터 수신동작 상태를 검출하는 제2 검출수단과, PC측 인터페이스 및 송신수단에 의한 통상송신의 동작을 제어하는 한편, 제1의 검출수단으로부터의 검출결과와 제2의 검출수단으로부터의 검출결과를 비교판정하고, PC로부터 데이터가 수신되어 있지 않은 상태 에서 상기 송신수단으로부터 송신상태가 연속적으로 수행하고 있다고 판정될 경우 상기 송신수단에 대하여 송신정지 신호를 출력하는 제어수단을 구비함을 특징으로 한다.The present invention is to stop the transmission output of the terminal, such as abnormal transmission state, to eliminate the adverse effect on the system operation, and is installed between the cable television line and the data communication device (PC) on the receiving side, A cable modem apparatus for modulating the data of a PC and transmitting the data to the receiving side through a cable television line, and demodulating the data transmitted through the cable television line to the PC, and transmitting the data output from the PC to the PC. Transmission means for receiving on the side via an interface, modulating and sending the signal to a cable television line, first detecting means for detecting a transmission operation state of the transmission means, and second detecting a data reception operation state of the PC-side interface; While controlling the normal transmission operation by the detecting means, the PC side interface and the transmitting means, When the detection result from the detection means and the detection result from the second detection means are compared and judged, and it is determined that the transmission state is continuously performed from the transmission means in a state where no data is received from the PC, the transmission means is sent to the transmission means. And control means for outputting a transmission stop signal.

도1은 본 발명의 회로 구성도1 is a circuit diagram of the present invention

도2는 종래 케이블 모뎀장치를 포함한 케이블텔레비젼통신 시스템 개략 구성도Figure 2 is a schematic configuration diagram of a cable television communication system including a conventional cable modem device

<도면의 주요부분에 대한 부호설명><Code Description of Main Parts of Drawing>

100 : 케이블 모뎀장치 111 : 혼합 분기기100: cable modem device 111: mixed tap

112 : 수신RF회로 113 : 송신RF회로112: receiving RF circuit 113: transmitting RF circuit

114 : LAN 1/F회로 115 : RF송신상태 검출회로114: LAN 1 / F circuit 115: RF transmission state detection circuit

116 : 데이터 수신 검출회로 117 : 마이크로 컴퓨터 회로116: data reception detection circuit 117: microcomputer circuit

200 : 케이블텔레비젼회선 300 : PC200: cable television line 300: PC

400 : 케이블400: cable

도1은 본 발명의 실시예로서, 케이블 모뎀 장치(100)는 케이블텔레비젼회선(200)에 접속된 혼합 분기기(111)와, 수신수단으로서 수신 RF회로(112)와, 송신수단으로서의 송신 RF회로(113)와, 통신기기(PC)측 인터페이스로서의 LAN인터페이스(LAN 1/F)회로(114)와, 제1의 검출수단으로서의 RF송신상태 검출회로(115)와, 제2의 검출수단으로서의 데이터 수신검출회로(116)와, 제어수단으로서의 마이크로 컴퓨터회로(117)와를 구비하여 구성하고, 케이블 모뎀장치(100)내의 LAN인터페이스회로(114)에는 PC(300)가 외부접속되게 하며 케이블 모뎀장치(100)와 PC(300)간의 케이블(400)에는 이더넷방식의 10BASE-T를 기반으로 전송용량 10Mbps의 튀스트 페어 케이블을 이용한다.1 shows an embodiment of the present invention wherein a cable modem device 100 includes a mixer branch 111 connected to a cable television line 200, a receiving RF circuit 112 as a receiving means, and a transmitting RF as a transmitting means. A circuit 113, a LAN interface (LAN 1 / F) circuit 114 serving as a communication device (PC) side interface, an RF transmission state detection circuit 115 as first detection means, and a second detection means. And a data receiving detection circuit 116 and a microcomputer circuit 117 as a control means. The PC modem 300 is externally connected to the LAN interface circuit 114 in the cable modem apparatus 100. The cable 400 between the 100 and the PC 300 uses a second pair cable having a transmission capacity of 10 Mbps based on an Ethernet-based 10BASE-T.

상기에서, 혼합 분기기(11)에는 예컨데, QPSK변조된 RF신호가 케이블텔레비젼회선(200)을 통하여 입출력되고, 수신 RF회로(2)는 미도시한 센터측에서 QPSK변조된 케이블텔레비젼회선(20)을 통하여 전송되는 RF신호를 수신하고 복조하여 LAN인터페이스회로(114)에 출력하게 된다. 송신RF회로(113)은 PC(30)로부터 데이터신호가 LAN인터페이스회로(114)를 통하여 입력되고, QPSK변조된 RF신호로 변환하여 케이블텔레비젼회선(200)에 송출한다.In the above, for example, the QPSK modulated RF signal is inputted and outputted through the cable television line 200, and the receiving RF circuit 2 is a QPSK modulated cable television line 20 at the center. Receives and demodulates the RF signal transmitted through the &lt; RTI ID = 0.0 &gt; The transmitting RF circuit 113 receives a data signal from the PC 30 via the LAN interface circuit 114, converts it into a QPSK modulated RF signal, and transmits it to the cable television line 200.

그리고, 상기의 RF송신상태 검출회로(115)는 송신 RF회로(113)의 송신동작의 상태(송신의 유무)을 검출하여 마이크로컴퓨터회로(117)에 출력하고, 데이터수신검출회로(116)는 LAN인터페이스회로(114)의 데이터 수신동작상태(데이터수신의 유무)를 검출하여 마이크로컴퓨터(117)에 출력한다.The RF transmission state detection circuit 115 detects the state of the transmission operation (transmission or not) of the transmission RF circuit 113 and outputs it to the microcomputer circuit 117, and the data reception detection circuit 116 The data reception operation state (with or without data reception) of the LAN interface circuit 114 is detected and output to the microcomputer 117.

상기 마이크로컴퓨터회로(117)는 마이크로프로세서 유니트로서 구성되어 있으며, 수신RF회로(112), 송신RF회로(113) 및 LAN인터페이스회로(114)에 대해서 제어신호(117A, 117B, 117C)를 발생하여 각 회로에 대해 통상의 수신동작상태의 제어를 행함과 동시에 RF송신상태검출회로(115)로부터 검출결과와 데이터 수신검출회로(116)로부터의 검출결과를 비교판정하고, PC(300)로부터 데이터가 수신되어 있지 않음에도 불구하고 상기 숭신RF회로(113)에 연속 송신상태에 있는 것으로 판정될 경우, 송신RF회로(113)의 변조회로에 대해 송신정지 코엔드(117D)를 발생하고, 변조회로의 송신을 강제적으로 정지시키는 제어를 행한다.The microcomputer circuit 117 is configured as a microprocessor unit and generates control signals 117A, 117B, and 117C to the reception RF circuit 112, the transmission RF circuit 113, and the LAN interface circuit 114. Control of the normal reception operation state is performed for each circuit, and the detection result from the RF transmission state detection circuit 115 is compared with the detection result from the data reception detection circuit 116, and the data is transferred from the PC 300. If it is determined that it is in a continuous transmission state to the Sungshin RF circuit 113 even though it has not been received, a transmission stop coend 117D is generated for the modulation circuit of the transmission RF circuit 113, Control to forcibly stop the transmission is performed.

이와 같은 구성의 본 발명은 송신RF회로(113)에 의해 송신상태 검출회로(115)에 현재의 송신동작의 상태를 전달하고, 이를 기반으로 RF송신상태 검출회로(115)는 송신의 유무를 판정하여 이 판정결과를 마이크로컴퓨터회로(117)에 전송하는 한편, LAN인터페이스회로(114)로부터 데이터 수신검출회로(116)에 현재의 수신동작의 상태를 전송한다. 이때 데이터수신 검출회로(116)는 수신유무를 판정하고, 이 판정결과를 마이크로컴퓨터(117)에 전송한다.The present invention having such a configuration transmits the current transmission operation state to the transmission state detection circuit 115 by the transmission RF circuit 113, and based on this, the RF transmission state detection circuit 115 determines the presence or absence of transmission. This determination result is transmitted to the microcomputer circuit 117, while the state of the current reception operation is transmitted from the LAN interface circuit 114 to the data reception detection circuit 116. At this time, the data reception detection circuit 116 determines whether there is reception, and transmits this determination result to the microcomputer 117.

마이크로컴퓨터회로(117)는 RF송신상태 검출회로(115)로부터 송신의 유무와 데이터 수신검출 회로(116)로부터의 수신의 유무와를 비교 판정하여 데이터 수신검출회로(116)로부터 데이터 수신상태가 전송되어 있지(수신없음)않음에도 불구하고 RF송신상태 검출회로(115)로부터 데이터 수신의 상태 또는 일정시간 연속인(송신이 있음) 경우 송신RF회로(113)의 송신을 강제적으로 정지시킨다. 이렇게 함으로써, 케이블텔레비젼시스템 운영상의 지장을 방지할 수 있고, 케이블 모뎀장치의 신뢰성을 향상시킬 수 있다.The microcomputer circuit 117 compares the presence or absence of the transmission from the RF transmission state detection circuit 115 with the presence or absence of the reception from the data reception detection circuit 116, and transmits the data reception state from the data reception detection circuit 116. Even if not (no reception), the transmission of the transmission RF circuit 113 is forcibly stopped in the case of the state of data reception from the RF transmission state detection circuit 115 or the transmission for a predetermined time (there is transmission). By doing so, it is possible to prevent troubles in the operation of the cable television system and to improve the reliability of the cable modem apparatus.

한편, 본 발명에서 송신 이상으로 송신정지 신호가 출력되어 마이크로컴퓨터회로(17)에 공급하고, 이 신호에 대해 마이크로컴퓨터회로(117)가 LED 등의 표시수단(미 도시)을 점등하게 하거나 또는 버저회로를 동작케 하거나, PC의 모니터 화면에 통신이상발생을 표시할 수 있게 할 수도 있다.On the other hand, in the present invention, the transmission stop signal is outputted to the microcomputer circuit 17 due to a transmission error, and the microcomputer circuit 117 lights the display means (not shown) such as an LED or the buzzer for this signal. The circuit can be operated or the communication error can be displayed on the PC monitor screen.

본 발명은 케이블텔레비젼통신 시스템에 있어서, 이상송신상태로 된 가입자 단말의 송신출력을 자동적으로 정지시켜 시스템 운영에 악영향을 최소한 억제할 수 있는 효과를 가진다.In the cable television communication system, the transmission output of the subscriber station in the abnormal transmission state is automatically stopped, thereby having the effect of minimizing the adverse effect on the system operation.

Claims (1)

수신측에 있어서 케이블텔레비젼 회선(200)과 PC(300)와의 사이에 설치되고, 퍼스컴(300)으로부터의 데이터를 변조하여 케이블텔레비젼회선(200)을 통하여 수신측에 전송하는 한편, 송신측에서 변조되고 케이블텔레비젼회선(200)을 통하여 전송된 데이터를 복조하여 PC(300)에 전송하는 케이블 모뎀장치(100)에 있어서,케이블 모뎀장치(100)를 케이블텔레비젼회선(200)에 접속된 혼합 분기기(111)와, 수신수단으로서 수신RF회로(112)와, 송신수단으로서의 송신RF회로(113)와, PC(300)측 인터페이스로서의 LAN인터페이스 회로(114)와, 제1의 검출수단으로서의 RF송신상태 검출회로(115)와, 제2의 검출수단으로서의 데이터 수신검출회로(116)와, 제어수단으로서의 마이크로컴퓨터회로(117)와를 구비하여 구성함을 특징으로 하는 케이블 모뎀장치.It is provided between the cable television line 200 and the PC 300 on the receiving side, and modulates the data from the personal computer 300 and transmits it to the receiving side via the cable television line 200, while modulating on the transmitting side. In the cable modem device 100 for demodulating and transmitting the data transmitted via the cable television line 200 to the PC 300, a mixed branch connected to the cable modem device 200 to the cable television line 200 111, the receiving RF circuit 112 as the receiving means, the transmitting RF circuit 113 as the transmitting means, the LAN interface circuit 114 as the PC 300 side interface, and the RF transmitting as the first detecting means. And a state detection circuit (115), a data reception detection circuit (116) as second detection means, and a microcomputer circuit (117) as control means.
KR1020010006341A 2001-02-09 2001-02-09 Cable modem device in Communication system through network of cable television KR20010067557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020010006341A KR20010067557A (en) 2001-02-09 2001-02-09 Cable modem device in Communication system through network of cable television

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020010006341A KR20010067557A (en) 2001-02-09 2001-02-09 Cable modem device in Communication system through network of cable television

Publications (1)

Publication Number Publication Date
KR20010067557A true KR20010067557A (en) 2001-07-13

Family

ID=19705537

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020010006341A KR20010067557A (en) 2001-02-09 2001-02-09 Cable modem device in Communication system through network of cable television

Country Status (1)

Country Link
KR (1) KR20010067557A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1169336A (en) * 1997-08-08 1999-03-09 Toshiba Corp Cable modem device
KR100226451B1 (en) * 1996-12-20 1999-10-15 이계철 Hfc connection module structure and hfc network termination unit structure in integrated optical network system
KR20000056176A (en) * 1999-02-13 2000-09-15 윤종용 Data &program trasnmitting/receiving method using cable modem
KR20010001312A (en) * 1999-06-03 2001-01-05 전주범 A cable modem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100226451B1 (en) * 1996-12-20 1999-10-15 이계철 Hfc connection module structure and hfc network termination unit structure in integrated optical network system
JPH1169336A (en) * 1997-08-08 1999-03-09 Toshiba Corp Cable modem device
KR20000056176A (en) * 1999-02-13 2000-09-15 윤종용 Data &program trasnmitting/receiving method using cable modem
KR20010001312A (en) * 1999-06-03 2001-01-05 전주범 A cable modem

Similar Documents

Publication Publication Date Title
US6108034A (en) Remote image information monitor
USRE35774E (en) Remote link adapter for use in TV broadcast data transmission system
JP2000503829A (en) Interactive interactive television system
WO2005101810A1 (en) Single wire return device for downstream ip signals
US4908819A (en) Integrated data voice multiplexer supporting handshake and loop-back protocols
KR100630435B1 (en) Method for transmitting monitored status information, and cable modem
CA2498280A1 (en) Adaptive communication modes
US7596801B2 (en) Single wire return device in a fiber to the home system
JPH07312748A (en) Catv system and modulation system discrimination method in catv system
KR20010067557A (en) Cable modem device in Communication system through network of cable television
JP2002010157A (en) Broadcasting receiving system
CN106878577B (en) Cable modem online control method and device
JPH1169336A (en) Cable modem device
MX2007013077A (en) Method and apparatus for processing a return path signal.
CA1290475C (en) Integrated data voice multiplexer supporting handshake and loop-back protocols
JP2001275100A (en) Catv network system, its repeating device, and its terminal device
JPH0346487A (en) Catv repeater
EP0663772A1 (en) Video signal transmission
JPH10224330A (en) Two-way communication system equipment
KR20020033871A (en) A connection compatible cable modem for the computer and the LAN hub device
JPS62104239A (en) Data transmission equipment
KR100775425B1 (en) System and method for port path redundancy of ATM terminal
JPH02200085A (en) Catv system
JPH04248792A (en) Subscriber video transmission system
JPH11284760A (en) Line terminal equipment

Legal Events

Date Code Title Description
A201 Request for examination
G15R Request for early opening
E902 Notification of reason for refusal
E601 Decision to refuse application