KR20030078353A - Access media gateway system - Google Patents

Abstract

PURPOSE: An access media gateway system is provided to be connected with a common cell controller of a common control device through an ATM interface function, and to include a line interface, thereby performing an interface function between each line and the common control device. CONSTITUTION: A common control device(100) comprises as follows. An IP interface(110) performs an interface function for an IP network. An ATM interface(120) performs an interface function for an ATM network. A TDM interface(130) performs an interface function for a PSTN. A common cell controller(140) performs a signal sound and a voice processing in order that data of each interface(110,120,130) can be suitable for transmission data. A main controller(150) controls operations of each interface(110,120,130) and the common cell controller(140). A remote device(200) performs an interface function between each line and the common control device(100).

Description

Access Media Gateway System

The present invention relates to a connected media gateway system.

Currently, Plain Old Telephone Service (POTS) provides services through electronic switchboards, demand dense optical subscriber systems and electronic switchboards, and DSLAM (Digital Subscriber) Line Access Multiplexer) system.

Here, the demand dense optical subscriber system (Fiber Loop Carrier, FLC) is composed of a central office terminal (COT) of the telephone company and a remote terminal (Remote Terminal, RT) in the subscriber dense area.

The optical subscriber system is a device developed for the optical cable of subscriber lines in a large office building. Unlike the optical transmission device for transmission between stations, the optical subscriber system provides a transmission channel between a telephone station and a subscriber. In addition, the optical subscriber system accepts asynchronous digital signals to provide telephones, low speed and high speed data lines, ISDN services, and the like.

On the other hand, the DSLAM system multiplexes the ATM over ADSL modem data to transmit data to the ATM network through the optical subscriber system (FLC), and performs the reverse function.

Here, the Digital Subscriber Line (DSL) is a service that can provide a fast and always connected Internet service to small local network businesses and homes.

Service Providers install DSL equipment in the local central office (CO) and install DSL-related modems at the user's site. At this time, DSL related modem connects user's computer and server through local telephone line, and connection is made through DS-3S to CO of service provider and DSLAM in CO. DSLAM aggregates the circuits and uplinks them to the heart of the network.

These DSLAMs are network equipment that is typically installed in telephone offices. They receive signals from multiple subscriber digital subscriber line connections and send signals to high-speed backbone lines using multiplexing techniques.

As such, the existing service for the general telephone subscriber or the high-speed data subscriber has not been prepared for the next generation communication network conversion because the communication network is established so that the user can access the network using a local telephone line.

In other words, the next-generation communication network is a high-speed, high-quality digital communication network that provides an integrated communication network that is individually operated for each service such as video, voice, text, and the like.

However, the current telephone line is an analog communication system, and thus is a line used for transmitting voice. Therefore, since the signal used in the computer is a digital signal, there is a problem in that a modem for converting into an analog signal is required between both sides when communicating through an existing telephone line.

An object of the present invention is to solve the above problems, to provide an access media gateway system that can be applied to the current telephone switching network and can be applied even when switching to the next generation communication network.

1 is a block diagram of a connection gateway system of the present invention.

2 is a diagram illustrating a board configuration of a connection gateway system of the present invention.

3 is a diagram illustrating a housing of the connection gateway system of the present invention.

An access media gateway system according to the present invention for realizing the above object includes an IP interface unit for performing an interface function for an Internet Protocol (IP) network and an interface function for an ATM (asynchronous transmission method) network. An ATM interface unit, a time division multiplexing interface unit performing an interface function for a public switched telephone network (PSTN), a common cell control unit for performing a beep and voice process so that data of each interface unit is adapted to transmission data, and A common control device including a main control unit for controlling an operation of each interface unit and the common cell control unit; a common control unit connected to the common cell control unit of the common control unit and common to each line of a subscriber, an ISDN subscriber, and a high-speed data subscriber; Remote device that performs the interface function between control devices It is made, including.

In this case, the common control device may be linked with a soft switch in a next generation network.

In addition, the control module and the Simple Network Management Protocol (SNMP: Simple Network Management Protocol) through the interworking equipment management system (EMS: Element Management System).

The common cell controller may perform data processing to be transmitted to a general telephone subscriber, an ISDN subscriber, and an ADSL subscriber through the remote device through an ATM matching function through an STM.

On the other hand, the remote device preferably comprises a line interface unit for performing the interface.

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

The gateway refers to an interworking device between networks, and serves to connect a circuit-switched network for a telephone or a public switched telephone network (PSTN) and a packet-switched network for a computer or an Internet Protocol (IP). In Voice over Internet Protocol (VoIP), the gateway has a function of converting voice data for a media gateway, that is, PSTN, into IP network data, and converting voice packet data input from IP into PSTN voice.

In this case, VoIP is a series of communication service technology that converts voice data into Internet protocol data packets on a computer network to enable voice calls such as telephone calls in a general telephone network.

In VoIP, gateways include Residential Gateways (RGWs), Access Gateways (AGs), and TGs (Trunking Gateways). Among them, the AG system is connected to a subscriber network by connecting with a Private Automatic Branch Exchange (PABX). As a system to be installed, a gateway function may be added to an exchange device or a concentrator, or a voice IP gateway function may be added to an existing router.

1 is a block diagram of an access gateway (AG) system of the present invention.

As shown in FIG. 1, the access gateway system may be largely divided into a common control device 100 and a remote device 200.

The common control device 100 performs an interface function for each network when connecting to an IP network via Ethernet or when connecting to an ATM (asynchronous transmission method) network via STM (synchronous transmission method). IP interface unit (IP I / F) 110 and ATM interface unit (ATM I / F) 120,

A time division multiplexing interface unit (TDM I / F) 130 for performing an interface function to match using the V5.2 protocol to transmit transmission data transmitted from the common cell control unit 140, which will be described later, to the PSTN;

A common cell controller 140 for performing a beep and voice process so that data received through the IP interface unit 110 or the ATM interface unit 120, the time division multiplexing interface unit 130, and the like are adapted to the transmission data;

The main control unit 150 controls overall operations of the interface units 110, 120, and 130 and the common cell control unit 140 in the common control device 100.

In this case, the main controller is connected to the element management system (EMS) 300 to receive a control command from the outside.

In particular, the common cell control unit 140 performs data processing so that the transmission data is transmitted to the PSTN through the time division multiplexing interface unit 130, and transmits the remote device 200 to be described later via the STM or ATM line. It also performs data processing for transmission to regular telephone subscribers, ISDN subscribers, and ADSL subscribers.

Such a common control device 100 of the present invention is interoperable with a soft switch in a next generation communication network. Here, the soft switch is a module that performs a control function of the existing electronic exchange and a distributed software-based switching platform. It is a system that provides local and relay exchange functions by interworking with various media gates.

The remote device 200 is connected to the common cell control unit 140 of the common control device 100 through the ATM matching function through the STM, and includes a line interface unit (Line I / F) 210, thereby providing a general subscriber. It performs an interface function between each line of the ISDN subscriber and the high speed data subscriber and the common control device 100.

Then, the access gateway system according to the present invention will be described with reference to Figs. 2 and 3 shown through the board configured on the main board to perform each function of the conceptual diagram.

2 is a diagram showing a board configuration of the connection gateway system of the present invention, Figure 3 is a diagram showing a housing diagram of the connection gateway system of the present invention.

As shown in FIG. 2 and FIG. 3, a board constituting the access gateway system is largely divided into a common platform back board (CMBB) 100 and an extended (remote) back board 200. It is composed.

Common back board 100 includes Common Main Processor board Assembly (CMPA) 101, ATM Network I / F Board (ANIB) 102, Extended (Remote) I / F Board (EXIB) 103, VCEB (V5) .2 Circuit Emulation Board (104) and Voice & Packetization & Signaling Board (VPSB) 105. The functions of these boards are as follows. Here, the VPSB 105 is shown only in FIG. 3.

The CMPA 101 performs the overall control function of the access gateway system of the present invention, performs a matching function with the EMS 300, and performs an ATM segmentation and re-assembly (SAR) function. Also, it performs V5.2 protocol matching layer function and soft switch interworking function.

The ANIB 102 performs the matching function and the layer processing function of the ATM network, performs ATM cell processing, routing processing, virtual path identifier (VPI) / Virtual Channel Identifier (VCI) address conversion, and uses UPC (Usage Parameter Control). Function and OAM (Opration & Maintenance) function.

The EXIB 103 performs a matching function with the SCDB 202 of the remote back board 200, which will be described later, and receives optical signal data to perform ATM cell extraction and its reverse function.

The VCEB 104 performs a matching function with the PSTN, and performs a V5.2 matching layer function and a circuit emulation (CE) function.

The VPSB 105 performs time division multiple traffic vocoder function and echo control function, packet processing (AAL2 or RTP packetization processing) function, dual tone multi frequency (DTMF) transmission / reception function, and various signal providing functions. Do this. The VPSB 105 is added to the common back board 100 to connect the VoDSL gateway and the Next Generation Network.

The remote back board 200 includes an extended (remote) processor board (EXPA) 201, an STM 1 & Circuit Emulation & DLC Board (SCDB) 202, a DSL Subscriber I / F Board (DSIB) 203, an ASIB ( Analog Subscriber I / F Board) 204, whose functions are as follows.

The EXPA 201 performs a control function of the remote back board 200 and an ATM segmentation and reassembly (SAR) function, and performs a general telephone service subscriber circuit and a line test function.

The SCDB 202 performs a matching function with the EXIB 103 of the common back board 100, receives optical signal data, and performs ATM cell extraction and its reverse function. In addition, it performs a CE (Circuit Emulation) function and a DLC (Digital Line Concentration) function.

DSIB 203 performs an ADSL subscriber matching function.

ASIB 204 performs a POTS subscriber matching function.

On the other hand, the signal flow of these boards are made through a local bus, a cell bus, and an S bus as shown in FIG. 2.

Therefore, those skilled in the art to which the present invention pertains can be applied to the current telephone exchange network through the common back board 100 and the remote back board 200 through the combination of such boards, and in the future ATM or It will be easy to understand that it is possible to provide an access media gateway system that can be linked with a soft switch when switching to a packet-based next-generation communication network such as IP.

The access media gateway system according to the present invention can be applied to switching to a current telephone switching network and a future next-generation communication network through an interface between call lines.

Claims (5)

An IP interface unit that performs an interface function for an Internet Protocol (IP) network, an ATM interface unit that performs an interface function for an Asynchronous Network (ATM) network, and an interface function for a public switched telephone network (PSTN) A common cell control unit for performing a beeping and voice process so that data of each interface unit is adapted to the transmission data, and a main control unit for controlling operations of the interface unit and the common cell control unit; controller; And a remote device connected to the common cell control unit of the common control device to perform an interface function between each line of a general subscriber, an ISDN subscriber, and a high speed data subscriber and the common control device. In claim 1, The common control device is connected to the media gateway system, characterized in that the interlocking with the soft switch in the next generation network (Next Generation Network). In claim 1, And a EMS (Element Management System) connected to the control module. In claim 1, And wherein the common cell controller performs data processing to be transmitted to a general telephone subscriber, an ISDN subscriber, and an ADSL subscriber through the remote device via an ATM matching line through an STM. In claim 1, And the remote device includes a circuit interface unit for performing the interface function.