KR19990001334A - Multimedia type multiplexing device and its mounting device - Google Patents

Abstract

The present invention relates to a multimedia multiplexing device and a mounting apparatus thereof, which are located in a telephone company of an access network system, incorporate a broadband video service, a voice and a dedicated line service, and transmit optically to a device installed in a residential area. The present invention relates to a multimedia multiplexing device that performs the reverse function and a mounting device thereof. When the multimedia multiplexing device of the present invention is used, broadband communication such as VOD as well as the existing PSTN service can be utilized by utilizing the existing subscriber's wire. It is effective in the economical broadband of subscriber networks that provide services.

Description

Multimedia type multiplexing device and its mounting device

The present invention relates to a multimedia multiplexing device and its mounting apparatus, which are located in a telephone company of an access network system, integrate broadband video service, voice and leased line service, and transmit optically to a device in a dense area to a device side and its reverse function. The present invention relates to a multimedia multiplexing device and a mounting apparatus for performing the same.

In general, subscriber services in public telecommunication networks have been developed from telephone-oriented services to broadband services such as data, integrated information network (ISDN), and video services. ATM switches, optical transmission devices, and broadband terminals for these broadband services have been developed. Already in the commercialization stage.

However, despite the development of such devices, the general subscriber provision of the broadband communication service is possible only when the broadband of the subscriber network is essential.

In addition, since broadband of the subscriber network requires an enormous amount of investment, there is a disadvantage that both the efficient and economic aspects of the network must be considered together.

In view of the above-mentioned disadvantages, the present invention provides an efficient and economical access network for widening the subscriber network, and provides the subscriber with the broadband service as well as the existing public telephone network (hereinafter referred to as PSTN) service. An object of the present invention is to implement a multimedia multiplexing device.

1 is a schematic block diagram of an access network system using a multimedia multiplexing apparatus according to the present invention;

2 is a block diagram showing a multimedia multiplexing device according to the present invention;

3 is a mounting diagram showing a front surface of a mounting apparatus for mounting a multimedia multiplexing device according to the present invention;

* Description of the symbols for the main parts of the drawings *

10: access network system 11: multimedia multiplexing device

111: main control unit 112: ATM transmitting and receiving unit

113: call / connection control unit 114: DSIE processing unit

115: optical transmission / reception unit 116: system clock processing unit

12: subscriber access device 20: public telephone network (PSTN)

30: ATM switching network 40: server

50: Multimedia type multiplexer mounting device

51: Main Control Unit (MCU) 52: ATM Main Control Unit (ACU)

53: ATM Transmit / Receive Unit (ATRU) 54: Optical Signal Transmit / Receive Unit (OTRU)

55: clock unit (CLK) 56: DS1E unit (DS1E)

In order to achieve the above object, the multimedia multiplexing device implemented in the present invention can provide not only the existing public telephone network service but also the current broadband service to the subscriber; Main control unit for controlling multimedia multiplexer; An ATM transmitting / receiving unit for transmitting / receiving ATM cells by connecting to an ATM switching network; A call / connection control unit communicating with an ATM switching network through the ATM transmission / reception unit to perform an ATM path forming function; A DS1E processor which emulates a DS1E signal input from an 'IDLC' or a 'UDLC' switch, and emulates an 'AAL1' line to make an ATM cell and transmits it to an optical transmitter / receiver; A plurality of optical transmission / reception units designed to be connected to a plurality of subscriber access devices; And it provides the synchronous clock to each part of the multimedia multiplexing device, and all the clocks required by the system by using the digital phase synchronous loop (PLL) and divider from the reference signal of each mode such as external synchronization, internal synchronization, loop synchronization, etc. It characterized in that it comprises a system clock processor for generating and supplying to each unit.

In addition, the mounting apparatus for mounting the multimedia multiplexing device according to the present invention includes a main control unit (MCU) for mounting a main control function in the multiplexing device; An ATM control unit (ACU) for mounting a call / connection control unit in the multiplexing device; An ATM transmit / receive unit (ATRU) mounted in an ATM transmit / receive unit in the multiplexing unit; An optical signal transmission / reception unit (OTRU) for mounting an optical transmission / reception unit in the multiplexing device; A clock unit (CLK) for mounting a system clock processor in the multiplexing device; A DS1E unit DS1E for mounting a DS1E processing unit in the multiplexing device; And a plurality of alarm panels.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a basic network configuration using a multimedia multiplexing device according to the present invention, a multimedia multiplexing device 11 located in a telephone station, and a plurality of subscriber access devices located in a demand-intensive area such as an apartment. Access network system 1 for optical transmission between the devices, including broadband, DS1 (1.544 Mbps) / DS1E (2.048 Mbps) dedicated lines, and broadband services such as video on demand (VOD). have.

Here, the DS1 (1.544 Mbps) / DS1E (2.048 Mbps) dedicated line is connected to a PSTN 20 connected to a telephone station, and the video-on-demand information is each server 40 storing movie information, entertainment information, and shopping information. It is connected via an optical line with the ATM switching network 30 for switching.

The subscriber access device 12 is connected to each set-top box (hereinafter referred to as STB) of subscribers.

The multimedia multiplexing device 11 performs the function of integrating the subscriber service in the telephone station and transmits the light and the reverse function thereof. The subscriber access device 12 receives the optical signal transmitted from the multimedia multiplexing device 11 and transmits the optical signal. It performs the function of providing service to subscribers by copper and vice versa.

As shown in FIG. 1, the access network system 10 optically transmits an optical fiber to an adjacent subscriber area by using an optical cable, and uses a copper wire for each subscriber inlet line to connect the service to an inlet front that connects a service (Fiber-To-The-). Curb: FTTC) is used to construct broadband subscriber network.

In addition, one multimedia multiplexing device 11 is a star structure in which a plurality of subscriber access devices 12 are connected in a point-to-multipoint. In more detail, the multimedia type multiplexing device 11 integrates the PSTN service 20 provided by the telephone station to the subscriber side and the VOD service provided by the ATM switching network 30 to the plurality of subscriber access devices 12 to the STM-. It performs optical transmission and reverse function at a transmission rate of 4 (622Mbps).

In addition, the multimedia type multiplexing device 11 has a connection form with the PSTN network 20 as DS1 and DS1E as mentioned above. DS1 is a dedicated line, and the DS1E processing module accommodates a dedicated line and a switching line service. .

At this time, the exchange line DS1E can be connected in the form of 'UDLC (Universal Digital Loop Carrier)' and 'IDLC (Intergrated Digital Loop Carrier)'.

The PSTN connection capacity per multimedia multiplexer 11 is 96 lines of DS1E switching line, 12 lines of DS1E dedicated line or 12 lines of DS1 dedicated line.

Access to ATM switching network 30 for VOD service is composed of 8 STM-1 (155Mbps) signals, and ATM switching network 30 uses ATM STM-1 interface for ATMized information from various servers 40. Provides the ability to route.

2 is a block diagram showing the inter-module interconnection of the multimedia multiplexing device 11 according to the present invention, which includes a main control unit 111 for controlling the multimedia multiplexing device; An ATM transmitting / receiving unit 112 connected to the ATM switching network 30 to transmit / receive ATM cells; A call / connection control unit 113 for communicating with the ATM switching network 30 through the ATM transmitting / receiving unit 112 to perform an ATM path forming function; A DS1E processing unit 114 for performing a function and a reverse function of emulating a DS1E signal input to an IDLC or UDLC switch to an AAL1 line to form an ATM cell and transmitting it to the optical transmitting / receiving unit 115; A plurality of optical transmission / reception units 115 designed to be connected to a plurality of subscriber access devices 12; And providing a synchronous clock to each part of the multimedia multiplexing device 11 and using a digital phase synchronous loop (PLL) and a divider from reference signals in each mode such as external synchronization, internal synchronization, and loop synchronization. And a system clock processor 116 for generating all the clocks and supplying them to each unit.

In detail, the main control unit 111 initializes each unit, performs an OAMP function such as alarm processing, performance monitoring, provisioning, and maintenance, and provides an operation terminal connection port on the front of the device. It provides various status information and control function through 'Craft Interface Terminal (CIT)'.

The ATM transmitter / receiver 112 receives four STM-1 signals and transmits signaling-related cells among the ATM cells received from the ATM switching network 30 to the call / connection controller 113, and the user cell transmits the corresponding optical / It routes to the receiver 115 and distributes the cells transmitted by the optical transmitter / receiver 115 to four STM-1 signals.

In addition, the cells from the switching network or the optical transmitting / receiving unit 115 are allocated a timeslot on the transmitting / receiving bus in advance in order to prevent a collision when transmitting or receiving the cells using the transmitting / receiving bus or each cell. Cells are processed using tags of a specific length in the head part.

In addition, up to two cards can be mounted in the self. If only one card is required, it can be operated.

In addition, in case there is no ATM switching network 30 in the country, it is replaced by a part that accepts one STM-4 signal instead of the ATM transmitter / receiver 112 that accommodates four STM-1 signals in case of connection with another exchange. It can be mounted.

In addition, since most of the data processed by the multimedia multiplexer 11 is a downlink user cell, only a part of the total 8 uplink STM-1 signals transmitted from the multimedia multiplexer 11 to the ATM switching network 30 is allocated. Although it is possible to design in a way to reduce the cost by saving the optical transmission module, the present invention designed the same up / down bandwidth in compliance with international recommendations related to future service expansion and ATM maintenance.

The call / connection controller 113 controls the ATM transmitter / receiver 112 and processes signals and OAM cells among ATM cells input / output in an ATM switching network.

In addition, the call / connection control function between the STB connected to the subscriber access device 12 and the ATM switching network 30, the flow processing for establishing the session with the level 1 gateway, and the table (resource, routing) management function are performed. In this paper, we have duplicated this section considering the importance of ATM call / connection processing.

The DS1E processing unit 114 may accommodate 12 × DS1E (360-star subscribers), and in the case of purely switched lines, the DS1E processing unit may be allocated to match with each optical transmitting / receiving unit 115 first and provisioned by a specific DS1E processing unit. The flexible design allows mapping to any of the subscriber access points 12 of 114 to allow for future service acceptance.

In addition, the DS1E processing unit 114 emulates a DS1E or DS1 signal input from a dedicated line network as an 'AAL1' line, generates an ATM cell, and transmits it to the optical transmitting / receiving unit 115, and performs a reverse function. A dedicated line of DS1 can be accommodated.

In the present invention, it is possible to map a specific DS1E or DS1 signal to an arbitrary subscriber access device 12 by provisioning in consideration that the number of leased lines in the apartment living area where the subscriber access device 12 is installed is not large. .

The optical transmitter / receiver 115 selects cells corresponding to their addresses from the DS1E processor 114 and the ATM transmitter / receiver 112 via a bus on a backplane and stores them in a buffer, and stores the cells in the buffer. To the payload of the STM-4 (622M) signal to process the pointer and overhead, and then performs optical transmission to the subscriber access device 12 through the next pre / op (E / O) conversion and its reverse function. do.

In addition, since each optical transmitting / receiving unit 115 is designed to be connected to two subscriber access devices 12 in the present invention, a total of eight optical transmitting / receiving units 115 (# 1 to # 8) are provided with 16 (# 1 to # 16 are connected to the subscriber access device 12.

The system clock processor 116 is dualized for operation and backup in order to prevent interruption of service when the clock processor 116 fails, and between the optical transmitter / receiver 115 and the DS1E processor 114 for smooth clock distribution. Position it.

3 is a view showing a front mounting state of the mounting apparatus 50 for mounting the multimedia multiplexing apparatus 11 implemented by the present invention, the mounting apparatus for mounting the multimedia multiplexing apparatus 11 of the present invention The standard rack (23 inches wide and 2200 mm high) is mounted and operated with four multimedia multiplexing devices, fuses and alarm panels, fans and cable panels.

In order to maintain compatibility with other equipments, the multimedia multiplexing device 11 accommodates standard interface standards for the ATM switching network 30 and the PSTN network 20, and considers the system expansion in accordance with the increase in future video services. It is designed to be an economic system that provides the aggregation function by designing the structure for the introduction of 'IDLC' signal processing protocol to the existing telephone switching network interface.

The front mounting diagram of the multimedia multiplexing device designed on the basis of these basic principles is shown in FIG. 3.

The multimedia multiplexing device 11 of the present invention is mounted in a standard rack of 23 inches in size with a total width of 105 slots (1 slot = 5.0 mm), a height of 8U (1U = 44.45 mm), and a depth of 280 mm. A main control unit (MCU) 51 for mounting the main control function 111 in the multiplexing device 11; An ATM control unit (ACU) 52 for mounting the call / connection control unit 113 in the multiplexing device 11; An ATM transmit / receive unit (ATRU) 53 mounted on the ATM transmit / receive unit 112 in the multiplexing apparatus 11; An optical signal transmission / reception unit (OTRU) 54 for mounting the optical transmission / reception section 115 in the multiplexing device 11; A clock unit (CLK) 55 for mounting the system clock processing unit 116 in the multiplexing device 11; And a DS1E unit (DS1E) 56 that mounts the DS1E processing unit 114 in the multiplexing device 11.

The main controller, the ATM transmitter / receiver, the optical transmitter / receiver, and the system clock processor are each 5 slots in size, and the remaining call / connection controller and DS1E processor are 4 slots in size.

After the multimedia multiplexing device is mounted on the mounting device as above, it is designed as a bus structure on the back-plane to enable communication with other parts through this bus, and it is possible to expand the system or add new functions for each part. It can be used without fixing.

The rear of each multimedia multiplexer is equipped with cable connection terminals so that 6 DS1 (E) signals are allocated to each subscriber access unit, and 12 dedicated lines are connected to the left side of the cable according to the cable position. It is configured to identify the location where the transmission is made.

In addition, a synchronization signal input / output terminal is mounted at the center of the rear panel to receive an external synchronization signal as an input terminal, and the output terminal is configured to perform a daisy chain-type retransmission function of the synchronization signal.

On the right side of the rear panel, there is a connector for alarm processing, a LAN connector for connection with an operation management system (FMS) that manages multiple access network systems while connecting with other multimedia multiplexing devices in the country, and a future communication management network (TMN). It is equipped with a connector for connection and a connector for remote monitoring of power supply of each subscriber interface device.

The above-described multimedia type multiplexing device is mounted on the mounting device to provide a subscriber with broadband service through a telephone station.

When the multimedia type multiplexing device of the present invention described above is used, it is effective to provide an economical subscriber network broadband that provides not only the existing PSTN service but also the broadband communication service such as VOD by utilizing the existing subscriber line.

In addition, a preferred embodiment of the present invention is disclosed for the purpose of illustration, those skilled in the art will be able to make various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following claims You will have to look.

Claims (18)

To provide subscribers with existing broadband services as well as existing public telephone network services; Main control unit for controlling multimedia multiplexer; An ATM transmitting / receiving unit for transmitting / receiving ATM cells by connecting to an ATM switching network; A call / connection control unit communicating with an ATM switching network through the ATM transmission / reception unit to perform an ATM path forming function; A DS1E processor which emulates a DS1E signal input from an 'IDLC' or a 'UDLC' switch, and emulates an 'AAL1' line to make an ATM cell and transmits it to an optical transmitter / receiver; A plurality of optical transmission / reception units designed to be connected to a plurality of subscriber access devices; And Synchronous clock is provided to each part of the multimedia multiplexing device, and all phases of the system are needed by using the digital phase synchronization loop (PLL) and divider from the reference signals of each mode such as external synchronization, internal synchronization, and loop synchronization. And a system clock processing unit for generating and supplying to each unit. The method according to claim 1, The main control unit initializes each unit, performs an 'OAMP' function such as alarm processing, performance monitoring, provisioning, and maintenance, and also provides operation terminal connection ports on the front of the device to provide various status information through 'CIT'. Multimedia type multiplexing device, characterized in that to provide a control function. The method according to claim 1, The main control unit, in case there is no ATM switching network in the office, is connected to an exchange in another station, and the ATM transmission / reception unit accepts one STM-4 signal instead of the ATM transmission / reception unit that receives four STM-1 signals. A multimedia type multiplexing device, characterized in that for controlling the mounting to replace the receiver. The method according to claim 1, The ATM transmitter / receiver receives four STM-1 signals, transmits signaling-related cells among the ATM cells received from the ATM switching network, and routes the user cell to the corresponding optical transmitter / receiver. In contrast, the cell transmitted from the optical transmitter / receiver divides four STM-1 signals. The method according to claim 1, The ATM transmitting / receiving unit transmits or receives a cell from a switching network or an optical transmitting / receiving bus using a transmission / reception bus to prevent a collision when A multimedia type multiplexing device, which is assigned a timeslot on a transmit / receive bus in advance or processes a cell by using a tag having a specific length in a head part of each cell. The method according to claim 5, And the uplink / downlink bandwidth of the downlink user cell of the transmitted / received cell and the uplink STM-1 signal in accordance with international recommendations related to future service expansion and ATM maintenance. The method according to claim 1, The call / connection controller controls the ATM transmitter / receiver and processes a signal and an OAM cell among ATM cells input / output in an ATM switching network. The method according to claim 1, The call / connection control unit performs a call / connection control function between a STB connected to a subscriber access device and an ATM switching network, a flow processing for establishing a session with a level 1 gateway, and a table management function. . The method according to claim 1, The call / connection control unit is a multimedia multiplexing device, characterized in that configured in a redundant structure. The method according to claim 1, The DS1E processing unit accommodates 12 × DS1E (360-star subscribers), and in the case of purely switched lines, is assigned to match each optical transmission / receiving unit preferentially, and a specific DS1E processing unit is provided by a provision to accommodate new services in the future. A multimedia type multiplexing device, comprising: a flexible structure for mapping to any subscriber access device of the present invention. The method according to claim 1, The DS1E processing unit emulates a DS1E or DS1 signal input from a dedicated line network, generates an ATM cell, transmits it to an optical transmission / reception unit, and performs a reverse function, and accepts a 12 × DS1E or 12 × DS1 dedicated line. Multimedia type multiplexing device, characterized in that. The method according to claim 1, The optical transmitter / receiver selects cells corresponding to their addresses from the DS1E processor and the ATM transmitter / receiver through a bus on the backplane and stores them in a buffer, and stores the cells of the buffer in the payload of the STM-4 signal. After processing the pointer and the overhead by mapping, and then performs the optical transmission to the subscriber access device through the all-optical (E / O) conversion and the reverse function of the multimedia type multiplexing device. The method according to claim 1, The system clock processing unit may be duplicated for operation and backup, in order to prevent interruption of service in the event of a clock processing unit failure; Multimedia multiplexing device, characterized in that configured to be located between the optical transmission / reception unit and the DS1E processing unit for smooth clock distribution. To implement the multimedia multiplexing device according to claim 1; A main control unit (MCU) for mounting a main control function in the multiplexing device; An ATM control unit (ACU) for mounting a call / connection control unit in the multiplexing device; An ATM transmit / receive unit (ATRU) mounted in an ATM transmit / receive unit in the multiplexing unit; An optical signal transmission / reception unit (OTRU) for mounting an optical transmission / reception unit in the multiplexing device; A clock unit (CLK) for mounting a system clock processor in the multiplexing device; A DS1E unit DS1E for mounting a DS1E processing unit in the multiplexing device; And Device for mounting a multi-media device, characterized in that comprising a plurality of alarm panels. The method according to claim 14, The ATM transmitting / receiving unit (ATRU) can be mounted up to a total of two sheets in each self, if not necessary, only one of the mounting device of the multimedia type multiplexing device, characterized in that the operating. The method according to claim 14, On the rear of the mounting apparatus, cable connection terminals are mounted so that 6 DS1 (E) signals are allocated to each subscriber access unit 12, and 12 dedicated wires are routed on the left side to transmit signals according to the cable position. Device for mounting a multimedia multiplexing device, characterized in that configured to be able to distinguish the location is made. The method according to claim 14, In the center of the rear panel of the mounting apparatus is equipped with a synchronization signal input / output terminal, so that the input terminal receives an external synchronization signal, and the output terminal is configured to perform a daisy chain-type retransmission function of the synchronization signal Device for mounting a multimedia multiplexing device. The method according to claim 14, On the right side of the rear panel of the mounting device, a connector for alarm processing, a LAN connector for connection with an operation management system (FMS) that manages multiple access network systems while connecting with other multimedia multiplexing devices of a national office, and a future communication management network ( TMN) connector and a connector for remote central monitoring of the power supply of each subscriber connection device including the mounting device of the multimedia multiplexing device.