KR0168937B1 - Subscriber apparatus for expanding the image service of a subscriber and structure of matching the same - Google Patents

Abstract

An object of the present invention is to provide economical burden to subscribers by providing a function to enable two or more video services at the same time by using one subscriber device (NT) and an additional particle device in a PON using TDM / polling. The present invention provides a subscriber device and its matching structure that enable the expansion of video services while reducing the number of subscribers.

In order to achieve the above object, the present invention adds a mode switching function to an existing main subscriber device to select the number of video services, and enables channel selection according to the number of video services. One video service is performed by the main subscriber device, and the other video signal is sent to another additional subscriber device using a coaxial line. The additional subscriber device has a function of restoring a compressed digital video signal and a channel selection function. The channel selection signal is sent back to the main subscriber device through a coaxial line, and the main subscriber device receives the channel selection signal from the additional subscriber device. Gather and send to subscriber service device LT.

Description

Subscriber device for subscriber video service extension and matching structure

Figure 1 is a subscriber device matching structure according to the prior art.

2 is a structure diagram of an uplink data frame according to the prior art.

3 and 4 are subscriber device matching structure diagram according to the present invention.

5 is a structural diagram of an uplink data frame according to the present invention.

6 is a block diagram of a main subscriber device according to the present invention.

7 is a block diagram of a secondary subscriber device according to the present invention.

* Explanation of symbols for main parts of the drawings

61: photoelectric conversion part 62: 155.52Mb / s inverse multiple part

63: 51.84 Mb / s inverse multiplexer 64: Video / sound signal selector

65: telephone connection 66: data connection

67: Maintenance unit 68,71: Video / sound decoder

69,72: Channel selector 610: 25.92Mb / s Multiple part

611: photoelectric conversion unit 612: mode switching unit

613: control signal generator

The present invention provides a passive optical network (PON) using a passive optical device between a line termination (LT) and a subscriber (network termination: NT) in a field of transmitting a signal using an optical fiber to a subscriber (FTTH; Fiber To The Home). 3 subscribers time-divided 155.52 Mb / s downlink in 51.84 Mb / s in an optical CATV system using TDM / polling as a transmission technology. The present invention relates to a subscriber device and a matching structure for enabling all 155.52Mb / s services to be used by using a low cost supplementary device with reduced functionality.

Looking at the prior art related to the present invention with reference to Figures 1 and 2 as follows.

1 is a schematic structural diagram of a subscriber device according to a conventional scheme.

The conventional structure shown in the drawing requires one main subscriber device when one subscriber requests one video service, but two subscriber subscriber devices are required if the subscriber requests two different video services at the same time. When one subscriber requests three different video services at the same time, three main subscriber devices are required, and thus the number of video service units is connected to the main subscriber device.

That is, the subscriber service device 11 functions to multiplex video, audio, telephone, data, and maintenance signals, and to convert them to all-optical lights, and then send them to the subscriber through an optical transmission path of 155.52 Mb / s. It is delivered to the three main subscriber stations (13, 14, 15) via the device (12). The optical signal is photoelectrically converted in the main subscriber device (13, 14, 15) and demultiplexed into video, audio, telephone, data and maintenance signals to serve the subscriber. In addition, when the subscriber selects a video channel, this signal is sent back through the main subscriber devices 13, 14, and 15 to the subscriber service device 11 to send the video of the channel selected by the subscriber.

2 shows a structure diagram of a conventional uplink signal.

The signal sent from the main subscriber device 13, 14, 15 to the subscriber service device 11 is divided into subscriber code, telephone signal, data dedicated signal, maintenance signal, and channel selection as one data. It is framed and sent through a 25.92 Mb / s optical transmission path and a passive optical splitter 12.

However, such a conventional configuration requires three subscriber stations (NT) in order for one subscriber to use all 155.52 Mb / s of services, thereby increasing the economic burden of the subscriber.

Therefore, the present invention devised to solve the problems of the prior art, while one subscriber using a single subscriber subscriber device (NT) and a low cost additional subscriber device reduced in function while reducing the economic burden of the subscriber 155.52Mb An object of the present invention is to provide a subscriber device and a matching structure for all services of / s.

The main subscriber device of the present invention for achieving the above object is a first photoelectric conversion unit for converting an optical signal of 155.51Mb / s into an electrical signal, 15.51Mb / s signals that are output of the photoelectric conversion unit three 51.84 Mb / 155.52Mb / s demultiplexing to demultiplex s signal, 51.84Mb / s demultiplexing 51.84Mb / s signal which is output of 155.52Mb / s demultiplexing into individual signals of video / audio, telephone, data and maintenance A mode switching unit for outputting a control signal operated by a switching switch when the device is installed, depending on whether or not to use with the sub-multiplexer and the number of sub-supply devices, and receiving the video / audio data among the outputs of the 51.84 Mb / s demultiplexer; A video / audio signal selector for selecting a video / audio signal according to a mode control signal from the mode switch and outputting it as a digital signal, and providing a video / audio signal from the video signal / audio selector to the subscriber, 51.84 Mb / s Signal connection means for transmitting the data signal and telephone signal from the de-multiplexer to the subscriber side, and receiving the maintenance signal from the output of the 51.84 Mb / s de-multiplexer. And a maintenance unit for collecting and outputting a maintenance signal generated in the device, a channel selection unit for receiving and converting channel information selected by the subscriber, and receiving a mode control signal from the mode switching unit. A control signal generator for outputting a transmission data frame configuration control signal, a mode control signal of the mode switching unit, a frame configuration control signal from the control signal generator, and a telephone signal from the subscriber via the telephone connection unit and a data connection unit. 25.92Mb / s of data from the subscriber, channel selector from the channel selector and additional subscriber The 25.92Mb / s to make the frame and the central and comprising a second photoelectric conversion that converts the electric signal the 25.92Mb / s, multi-output portion of a light signal.

The signal connection means may include a video / audio decoder which is converted into a digital signal output from the video / audio decoder and converts the compressed video / audio signal into an original video / audio signal, and the 51.84Mb / s demultiplexer. A telephone connection unit for receiving a telephone data output and converting a digital signal into a telephone signal and converting a subscriber's telephone signal into a digital signal and outputting the data signal among the outputs of the 51.84 Mb / s reverse multiplexer to the subscriber side. And a data connection unit for interfacing and outputting data signals on the subscriber side.

In addition, the additional particle device according to the present invention, the video / audio decoder and subscriber to convert the compressed 51.84Mb / s digital video / sound signal received through the coaxial line from the main subscriber device to the original video / sound signal and output And a channel selector for converting the channel information selected by the digital signal into a 64Kb / s digital signal and transmitting the same to the main subscriber station.

Meanwhile, the subscriber device matching structure according to the present invention receives an optical signal transmitted from a subscriber service apparatus of an optical CATV network through a passive optical splitter, separates and outputs the first video / audio signal, a telephone signal, and data, and then subscribes. A main subscriber device which multiplexes a channel selection signal from the subscriber side with a telephone and data signal from a subscriber and outputs the signal to the subscriber service device, and is connected to the main subscriber device to provide a second video / audio signal to the subscriber side; And at least one secondary subscriber device coupled to transmit the channel selection signal of the side to the primary subscriber device.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 3.

3 is a schematic diagram of a subscriber device matching structure according to an embodiment of the present invention, in which one subscriber receives one video service, telephone, and data service from one primary subscriber device 33, and the other subscriber receives one primary subscriber device. In addition to 34, an example of a structure in which two video, telephone, and data services can be received using the additional particle device 35 is shown.

The optical signal transmitted from one subscriber service device 31 is divided into two through the manual optical splitter 32 and then serviced through the two subscriber's main subscriber devices 33 and 34. In this case, the primary subscriber device 34 receives two video signals and transmits one of them to the secondary subscriber device 35 through the coaxial line to receive two other video signals at the same time. The secondary subscriber device 35 has a function of selecting a video channel, and the subscriber has a function of selecting a video channel in the secondary subscriber device 35. When the subscriber selects a video channel through the secondary subscriber device 35, This channel selection signal is converted into an optical signal through the main subscriber unit 34 again through a coaxial line and transmitted to the subscriber service apparatus 31 so that the subscriber can select a channel.

4 is a diagram of a subscriber device matching structure according to another embodiment of the present invention, so that one subscriber can receive one video service using one primary subscriber device 42 and two secondary subscriber devices 43 and 44. An example is shown.

The optical signal transmitted from one subscriber service device 41 is photomultiplexed through the main subscriber device 42 and then demultiplexed so that one video, telephone and data service can be directly received using the main subscriber device 42. In addition, the other two video services may receive and provide video signals transmitted from the primary subscriber device 42 to the secondary subscriber devices 43 and 44 using coaxial lines. Here, since the two sub subscriber stations 43 and 44 have a channel selection function, they can receive different video services.

5 is a structural diagram of an uplink signal applied to the present invention.

In the figure (51) shows an uplink data frame transmitted from the primary subscriber device, the mode classification signal, which is divided according to how many secondary subscriber devices are used, that is, how many video services a subscriber receives at the same time, One unique code, the subscriber code, telephone signal, data signal, maintenance signal, channel selection signal # 1 selected by the subscriber using the subscriber subscriber device, and channel selection signals # 2 and # 3 selected by the subscriber subscriber device. Of 25.92 Mb / s data frames are transmitted to the subscriber service device.

Reference numeral 52 denotes a control signal when one subscriber views one image, and channel selection # 2 and # 3 are not used because the secondary subscriber device is not used. The mode classification signal uses a binary number 00000000 so that the subscriber service device can recognize it. Reference numeral 53 shows a control signal when one subscriber views two images. Since only one main subscriber device and one secondary subscriber device are used, channel selection # 3 is not used. The mode classification signal uses a binary number 10101010 so that the subscriber service device can recognize it. Reference numeral 54 denotes a control signal when one subscriber views three images. Since one main subscriber device and another two additional subscriber devices are used, channel selection # 2 and # 3 are both used. The mode classification signal uses a binary number 11001100 so that the subscriber service device can recognize it.

6 is a configuration diagram of a main subscriber station NT according to the present invention.

As shown in the figure, the main subscriber device according to the present invention includes a photoelectric conversion unit 61 for converting an optical signal of 155.51 Mb / s into an electrical signal, and converts the 155.52 Mb / s signals into three 51.84 Mb / s signals. 15.42 Mb / s inverse multiplexer 62, 51.84 Mb / s inverse multiplexer 63, 51.84 Mb / s, to demultiplex 51.84 Mb / s signals into individual signals of video / audio, telephone, data and maintenance The image is received by the main subscriber device use mode determined by three modes depending on how many sub subscriber devices are used by receiving video / audio data during the output of the demultiplexer 63 and receiving information from the mode switching unit 612. The audio signal selection unit 62, which selects an audio signal and outputs it as a digital signal, receives the telephone data output of the 51.84 Mb / s demultiplexer 63, and converts the digital signal into a telephone signal. To the output of the telephone connection section 65, 51.84 Mb / s demultiplexer 63, Digital output from the data connection unit 66 which separates and connects the data, the maintenance unit 67 which receives the output of the 51.84 Mb / s demultiplexer 63, and manages the subscribers, and the video / audio decoder 68. A video / audio decoder 68 for converting a compressed video / audio signal into an original video / audio signal by converting the signal into a signal, and a channel selector 69 for receiving and converting channel information selected by the subscriber to digital. Receives information from the return unit 612, receives a control signal from the control signal generator 613, a telephone signal from the subscriber via the telephone connection unit 65, data from the subscriber via the data connection unit 66, a channel selector ( 69) and the 25.92 Mb / s multi-part 610, 25.92 Mb / s multi-part 610, which make a channel selection signal from the additional particles into a 25.92 Mb / s data frame (51 in FIG. 5). Photoelectric conversion unit 611 for converting an electrical signal into an optical signal Depending on how many secondary subscriber devices are used, the mode switching unit 612 which can be operated by a switching switch when the primary subscriber device is installed, and the mode switching unit 612 receive information from the mode switching unit 612 (see FIG. And a control signal generator 613 for generating 53 and 54.

In more detail, the 155.52 Mb / s signal converted into an electrical signal by the photoelectric conversion unit 61 is output to the 155.52 Mb / s demultiplexer 62, and the 155.52 Mb / s demultiplexer 62 is 155.52 Mb / s. The signal is demultiplexed into three 51.84 Mb / s signals and sent to the 51.84 Mb / s inverse multiplexer 63. The 51.84 Mb / s demultiplexer 63 has three 51.84 Mb / s demultiplexers having the same function, and is divided into video / audio, telephone, data, and maintenance signals by each 51.84 Mb / s demultiplexer. The video / audio signal is output to the video / audio signal selection unit 64, the telephone signal to the telephone connection unit 65, the data to the data connection unit 66, and the maintenance signal to the maintenance unit 67, respectively. The video / audio signal selector 64 receives three video / audio signals received from the 51.84 Mb / s demultiplexer 63 according to each mode under the control of the control signal received from the mode switcher 612. And the other two video / audio signals to the video / audio decoder of the secondary subscriber station. This configuration, of course, relates to signal processing in the case where two additional subscriber devices are connected.

The video / audio decoder 68 demodulates this signal and sends it to a television receiver (not shown). The telephone connection unit 65 demodulates the 2.048 Mb / s digital telephone signal received from the 51.84 Mb / s reverse multiplexer 63 and sends it to the subscriber's general analog telephone (not shown). The data connection unit 66 connects the 2.048 Mb / s data signal received from the 51.84 Mb / s demultiplexer 63 to the device. The maintenance unit 67 manages the subscriber unit by the subscriber unit maintenance signal received from the 51.84 Mb / s demultiplex unit 63, or collects the maintenance signal generated from the subscriber unit and collects the 25.92 Mb / s multiple unit 610. Send to).

The control signal generator 613 receives the mode information from the mode switching unit 612 and forms a control signal as shown in (52, 53, 54) of FIG. 5 and sends it to the 25.92Mb / s multiplexer 610. The 25.92 Mb / s multi-part 610 receives the channel information selected by the subscriber from the channel selector 69, receives the subscriber's telephone information from the telephone connection unit 65, and receives the subscriber's data information from the data connection unit 66. Also receives channel selection information from the secondary subscriber device. By adjusting the control signal generated from the control signal generator 613, it is multiplexed into a 25.92 Mb / s data frame and sent to the photoelectric conversion unit 611 as shown in (51) of FIG. The photoelectric conversion unit 611 converts an electrical signal received from the 25.92 Mb / s multiplexer 610 into an optical signal and transmits the converted optical signal.

7 is a block diagram of a secondary subscriber device according to the present invention.

As shown in the figure, the secondary subscriber device according to the present invention includes a video / audio decoder 71 and a subscriber for converting a compressed digital video / audio signal received through a coaxial line from a primary subscriber device into an original video / audio signal. And a channel selector 72 for converting the selected channel information into digital and transmitting the same to the main subscriber apparatus.

That is, the video / audio decoder 71 receives one 51.84 Mb / s video / audio from the main subscriber device and demodulates it and sends it to the television receiver in the subscriber's home. The channel selector 72 converts the information on the channel of the video / audio selected by the subscriber into a digital signal of 64 Kp / s and then sends the 25.92 Mb / s multiple part 610 of the main subscriber device.

Therefore, the present invention configured and operated as described above has the effect of extending the reception of the video service while reducing the economic burden of the subscriber.

Claims (6)

A first photoelectric conversion unit 61 for converting an optical signal of 155.51 Mb / s into an electrical signal, and 155.52 for demultiplexing 155.52 Mb / s signals output from the photoelectric conversion unit 61 into three 51.84 Mb / s signals 51.84 Mb / s inverts the 51.84 Mb / s signal output from the Mb / s demultiplexer 62 and the output of the 155.52 Mb / s demultiplexer 62 into individual signals of video / audio, telephone, data, and maintenance. Among the outputs of the 51.84 Mb / s demultiplexer 63, the mode switching unit 612 outputs a control signal operated by a switching switch when the device is installed, depending on the central part 63 and the number of sub subscriber devices. A video / audio signal selector 62 for receiving video / audio data and selecting and outputting a video / audio signal by a mode control signal from the mode switcher 612 as a digital signal, the video signal / audio Provides the subscriber with the video / audio signal from the selector 62 and from the 51.84 Mb / s demultiplexer 63. The subscriber and the subscriber to receive the signal and the telephone signal to the subscriber side, and the signal connection means for transmitting the subscriber's data and telephone signal into the device, and the maintenance signal from the output of the 51.84Mb / s demultiplexer 63 to manage the subscriber And a maintenance unit 67 for collecting and outputting a maintenance signal generated in the device, a channel selection unit 69 for receiving and converting channel information selected by the subscriber into a digital signal, and the mode switching unit 612. A control signal generator 613 that receives a mode control signal from the controller and outputs a transmission data frame configuration control signal, a mode control signal of the mode switching unit 612, and a frame configuration from the control signal generator 613. Receives a control signal and receives a telephone signal from the subscriber via the telephone connection 65, data from the subscriber via the data connection 66, and a channel selection signal from the channel selector 69 and the subscriber. s 25.92Mb / s multi-unit 610 for making a data frame, and a second photoelectric conversion unit 611 for converting and outputting an electrical signal which is the output of the 25.92Mb / s multi-unit 610 into an optical signal A main subscriber device for video service extension in an optical CATV network. The video / audio decoder 68 according to claim 1, wherein the signal connection unit converts the compressed video / audio signal into a digital signal output from the video / audio decoder 68 into an original video / audio signal. And a telephone connection unit 65 which receives the telephone data output of the 51.84 Mb / s demultiplexer 63, converts a digital signal into a telephone signal, and converts a subscriber's telephone signal into a digital signal and outputs the digital signal. In the optical CATV network, characterized in that it comprises a data connection unit 66 for receiving a data signal of the output of the 51.84Mb / s demultiplexer 63 to interface to the subscriber side, and to interface and output the data signal of the subscriber side. Primary subscriber device for video service extension. The data frame output by the 25.92 Mb / s multiplexer 610 includes mode classification information, subscriber code information, telephone information, data information, maintenance signal information, and first to third channel selection information. A main subscriber device for video service extension in an optical CATV network, comprising: 4. The control signal output from the control signal generator 613 according to claim 3, wherein the control signal generator 613 outputs the mode classification information, the subscriber code information, the telephone information, the data information, the maintenance signal information and the channel selection when only one subscriber is used. A first control signal for generating a data frame structure including # 1 information, and mode classification information, subscriber code information, telephone information, data information, and maintenance when a subscriber uses a main subscriber device and one additional subscriber device. A second control signal for generating a data frame structure including signal information, channel selection # 1 information and channel selection # 2 information, and mode classification information and subscriber code when a subscriber uses the main subscriber device and the two additional subscriber devices; Data including information, telephone information, data information, maintenance signal information and channel selection # 1 information, channel selection # 2 and channel selection # 3 information The primary subscriber station for video service extension in an optical CATV network, characterized in that any one of a third control signal to generate a frame structure. 64Kb / s channel information selected by the video / audio decoder 71 for converting the compressed 51,84Mb / s digital video / audio signal received through the coaxial line from the main subscriber device into the original video / audio signal. And a channel selector (72) for converting the signal into a digital subscriber signal and transmitting the same to a primary subscriber device. In the subscriber device matching structure for the video service extension in the optical CATV network, the optical signal transmitted from the subscriber service device 31 of the optical CATV network is received through the passive optical splitter 32 to receive the first video / audio signal. And a main subscriber device which separates and outputs a telephone signal and data, and multiplexes a channel selection signal from a subscriber side with a telephone and data signal from a subscriber and outputs it to the subscriber service device, and is connected to the main subscriber device. And at least one secondary subscriber device coupled to provide a video / audio signal to the subscriber side and to transmit a channel selection signal of the subscriber side to the primary subscriber device.