KR19990058089A - Transmission device for providing multi service - Google Patents

Abstract

AMS switch and AD for transmitting device for providing multi service to collect service providing equipment providing contents to be serviced through subscriber network and various multimedia services provided from the devices to each subscriber Tee, O & Y which converts the various multimedia services delivered as optical signals to the vicinity of subscribers and converts them into electrical signals and provides them to each subscriber through a telephone line, and provides various multimedia services provided in the subscriber's premises to each corresponding terminal. It consists of a set-top box.

Description

Transmission device for providing multi service

The present invention relates to a subscriber transmission network, and more particularly, to a subscriber transmission apparatus and method for providing a multimedia service.

1 is a diagram illustrating a subscriber network configuration of a telephone service using a general telephone line according to the prior art.

2 is a diagram illustrating a subscriber network configuration of a large-capacity telephone service of the FTTB structure according to the prior art.

1 and 2, the service from the telephone station to the subscriber cannot be provided to the general telephone line 113 except for the telephone signal and the N-ISDN signal. In the case of a large building, it was possible to service a large amount of telephone signals in a point-to-point or loop form of the FTTB structure. Recently, the demand for multimedia services is increasing rapidly, and subscribers want to receive various multimedia services at home or office quickly and conveniently.

However, according to the prior art, there are many limitations in providing a real time video signal, a call signal, and internet data to a subscriber, and a real time video signal is impossible. Therefore, at present, a separate coaxial cable network is provided and provided in a form separate from a telephone signal. In case of internet data, a separate modem must be purchased and used, which has a limitation in speed and difficulty in using. In addition, in order to receive telephone signals at the same time, it was necessary to install a separate telephone or install N-ISDN equipment. Therefore, the existing subscriber network technology and equipment had a lot of limitations in providing the full service desired by the subscriber, and the burden on the subscriber was increased in terms of price, and there was a big problem in network operation because it was necessary to establish different networks. .

Accordingly, an object of the present invention is to significantly improve the transmission band of the subscriber network to provide subscribers with various video signals, telephone signals, and internet data services through telephone lines installed in the existing subscriber's premises, thereby reducing the cost of installation work and providing faster and higher quality. An apparatus and method for providing a multimedia service are provided.

Another object of the present invention is to deliver a video signal, a telephone signal, and Internet data collected by using an optical cable to near the subscriber, and to implement the VDSL technology for transmitting the same to the set-top box installed in the subscriber's home using the existing telephone line And providing a method.

The subscriber transmission device for providing a multi-service for achieving the above objects, the service providing equipment for providing the content to be serviced through the subscriber network and a variety of multimedia services provided from the equipment provided to each subscriber AMT switch and HT, and the OENU to convert each of the various multimedia services delivered as an optical signal to the subscriber to the electrical signal to provide to each subscriber by telephone line, and the various multimedia installed in the subscriber premises It is characterized by consisting of a set-top box that provides services to each corresponding terminal.

1 is a diagram illustrating a subscriber network configuration of a telephone service using a general telephone line according to the prior art.

Figure 2 is a diagram illustrating a subscriber network configuration of a large-capacity telephone service of the FTTB structure according to the prior art.

3 is a diagram illustrating a subscriber network configuration for multi-service according to the present invention;

4 and 5 illustrate examples of application of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, in adding reference numerals to the components of each drawing, the same components have the same reference numerals as much as possible even if they are displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, the terms to be used continuously prior to the description of the present invention is defined as follows.

MPEG2: Moving Picture Expert Group 2; MP2

L1GW: Level 1 GateWay; Communication gate

ATM: Synchronous Transfer Mode; Asynchronous transmission mode

HDT: Host Digital Terminal; Hditi

ONU: Optical Network Unit; Ohenyu

STB: Set Top Box; Set top box

VOD: Video On Demand; Vaudio

D-CATV: Digital Cable TV; Digital cable tv

2 is a diagram illustrating a configuration of a subscriber network providing a multiservice according to an embodiment of the present invention.

Referring to FIG. 2, the configuration of the present invention is largely divided into four parts. The first is service providing equipment (31,312,313) that provides the content to be serviced through the subscriber network. The second is an ATM switch 314 and an HDT 315 installed in a telephone station to collect various multimedia services provided by various service providers and provide them to each subscriber. The third is the ONU 316 installed near the subscriber's house or apartment and converting the optical signal transmitted from the HDT 315 into an electrical signal and providing the subscriber with an existing telephone line. The fourth is installed in the subscriber's home and receives the electrical signal transmitted from the ONU316 and releases the compressed video signal to show the video such as D-CATV, VOD through the TV. The set-top box 325 is sent to the serial port of the PC.

Referring to the functions of the above-described components in more detail as follows.

Among the service providing equipment, the equipment 311 for the D-CATV service includes an MPEG2 encoder 317 and an ATM MUX 318. The MPEG2 encoder 317 digitizes and compresses an existing video signal, and the ATM MUX318 converts digital video signals compressed by several MPEG2 encoders 317 into ATM cells and broadcasts VPI / VCI (Virtual Path Identifier /) for each broadcasting channel. After assigning Virtual Cricuit Identifier value, it converts into STM-1 / STM-4 (synchronous transfer mode) optical signal and transmits it to optical subscriber through ATM switch 314 in telephone station 323.

Among the service providing equipments, the equipment 312 for the VOD service includes a large capacity hard disk in which a video signal to be provided to a subscriber is compressed into MPEG2 and stored as a file, and ATM-selected files selected by the subscriber are converted into STM-1 optical. The video server 320 converts and transmits the signal, the L1GW321 which forms a channel to enable the VOD service upon receiving the request of the subscriber's VOD service, and measures how much VOD the subscriber has used from the L1GW321. And a building system 319 for managing information.

In addition, the equipment for the Internet data service 313 includes a router (322) equipment and a web server (WEB Server) to provide a web (web) service.

Since video signals such as D-CATV and VOD and telephone signals provided with Internet data are not ATMs, STM-1 optical signals are connected to the HDT315 from the public public telephone network (PSTN) 324. Accordingly, the HDT315 collects all services and provides a service required by a connected subscriber through communication with the set-top boxes 325.

Hereinafter, an operation according to the present invention will be described with reference to FIG. 2.

Since the D-CATV is a broadcasting concept, the video signal is digitized and compressed in real time through the MPEG2 encoder 317, and then through the ATM switch 314 to the set-top box 325 of each subscriber by the cell copy function in the HDT315. Passed through ONU316. Unlike analog cable TV that receives all existing broadcast channels and selects a desired channel, the set-top box 325 delivers a broadcast channel selection request message to the HDT315, and the HDT315 sets-top the ATM cell of the broadcast channel. It delivers to box 325 so that the subscriber can watch the desired broadcasting channel. At this time, the HDT315 informs the set-top box 325 which VPI / VCI value is used by the ATM cell of the broadcast channel. Accordingly, the set-top box 325 collects the ATM cells, reconstructs an MPEG2 Transfer Stream (TS), and reproduces a video signal in the MPEG2 TS by using the MPEG2 decoding function to show the subscriber through a TV.

In the case of the VOD, the selected compressed video signal is transmitted to the ATM cell and played back in the set-top box 325, but the communication channel is allocated through communication with the L1GW321 to select the desired compressed video signal. It downloads menu files and shows service items on TV so that subscribers can select programs. Here, the L1GW321 provides communication channel information on both sides of the video server 320 and the subscriber set-top box 325 so that the video server 320 and the set-top box 325 can select a compressed video signal desired by the subscriber through communication. To help. The selected video signal is stored in the form of MPEG2 TS and then split into ATM cells by pumping of the video server 320, and is converted into an STM-1 optical signal and transmitted to the ATM switch 314. The communication protocol between the L1GW321 and the set top box 325 / video server 320 is referred to as DSM-CC User-to-Network, and the communication protocol between the video server and the set top box 325 is referred to as DSM-CC User-to-User.

Here, in order for the subscriber set-top box 325 to communicate with the L1GW321 or the video server through the DSM-CC protocol, a communication channel of an ATM network must be allocated. That is, a path for the set-top box 325 to communicate with the L1GW321 and the video server 320 must be opened via the ONU316-> HDT315-> ATM switch 314. There are two methods in ATM network to open such communication channel. One method is PVC (Permanent Virtual Channel). The PVC is a method of assigning a fixed communication channel to all set-top box 325 like a general telephone line, communication channels are always assigned to the unused set-top box 325 has an uneconomical disadvantage. On the other hand, SVC (Switched Vertual Channel) requires the required communication channel and bandwidth of the communication channel through UNI 3.1 Signaling (Q.2931) only when the set-top box 325 is to be serviced, and then allocates and uses it. This has the advantage that the limited communication channel can be used efficiently. That is, when the set-top box 325 requests the communication channel to the HDT315 via UNI 3.1 signaling via ONU316, the HDT315 also sends a UNI 3.1 signaling protocol to the connection manager that manages the network connection inside or outside the ATM switch 314. Through the communication channel request through the response to receive the available VPI / VCI value of the communication channel is delivered to the set-top box 325. That is, when the communication channel with the device to communicate through the SVC signaling process is formed, the DSC-CC protocol message is transmitted and received through the communication channel to download the desired final video signal. In the case of an Internet data service, a method of assigning a communication channel is the same as the VOD, except that data transmitted through a router or a web server is Internet information.

Hereinafter, application examples of the present invention will be described with reference to FIGS. 4 and 5.

4 shows a network configuration capable of VOD, Pay Per View, Internet data service, etc. based on a private exchange network such as a hotel.

Referring to FIG. 4, the hotel has an HDT411 connected to a trunk line in a hotel underground space, thereby providing various multimedia services to hotel guests. That is, various video services using the Internet data service and D-CATV provided by the trunk line and the VOD412 owned by the company are provided to each room through the HDT411 and ONU413. That is, various multiservices collected in the HDT411 are provided to ONU413 of each floor, and the ONU413 transmits various services provided in the HDT411 to the corresponding room. In addition, the transmitted service is provided to the corresponding terminal (TV, PC, telephone) through the set-top box 414 of each room so that the guest can easily and conveniently use various multi-services.

5 shows a network configuration capable of remote meter reading, remote monitoring, complex information, and video telephone service in an apartment or a large building.

Referring to FIG. 5, various services provided from a trunk line and a video service provided by a broadcasting facility in a complex are provided to the ONU512 after being collected in the HDT511, and the various services provided from the HDT511 are provided to the subscriber and the guard room 513 in the ONU512. do. If you configure a service network such as remote meter reading, disaster prevention, remote monitoring, etc., the configuration is to install a surveillance camera for each floor to transmit the image taken by the camera to the ONU512, the video signal in the ONU512 guard room To the set-top box 514 of the floor to show the situation on the TV in the guard room. In addition, the camera in the complex is configured to provide the video signal taken by the ONU512 so that the situation in the complex can be confirmed in the guard room.

As described above, the present invention can be used for all application services requiring a bidirectional channel other than VOD or Internet information. That is, the present invention can provide each subscriber with a bandwidth sufficient to transmit video signals and Internet data, so that remote meter reading, remote monitoring device, home shopping, home banking, remote education, video telephony, video conferencing, crime prevention, hotel The best transmission bandwidth can be stably provided for application services such as internal multimedia network construction and internal multimedia network construction. In addition, the above is provided to the subscriber through one telephone line, thereby providing a great advantage in the installation.

Claims (2)

In the transmission device for providing a multi-service, Service providing equipment providing contents to be provided through a subscriber network; AMT switch and AD to collect various multimedia services provided from the equipment to provide to each subscriber, Oenyu, which converts the various multimedia services transmitted as optical signals to near subscribers and converts them into electrical signals and provides each subscriber with a telephone line, And a set-top box installed in the subscriber's home and configured to provide various multimedia services provided to the corresponding terminals. The method of claim 1, With the service providing equipment, It provides a video signal, digital cable TV equipment consisting of MP2 encoder and ATM mux, It provides a video signal, and V-audio equipment composed of communication gate, video server, building system, A transmission device for providing a multi-service, characterized in that there is provided an Internet data service, Internet equipment consisting of a router and a web server.