KR20020028289A - Atm switch router interface device in imt-2000 system - Google Patents

Abstract

PURPOSE: An apparatus for interfacing an ATM(Asynchronous Transfer Mode) switch router in an IMT(International Mobile Telecommunication)-2000 system is provided to miniaturize a structure and increase the efficiency in maintenance/management by mounting a BEIA(BTS E1 Interface Assembly) as one card type on the ATM switch router. CONSTITUTION: A BEIA board(210) connects to a plurality of BTSs(Base Transceiver Stations)(100) through an E1 line, receives ATM E1 signals from a plurality of BTSs(100), checks an error, divides the received ATM E1 signals by cell unit, and transmits the divided ATM E1 signals. An 155M physical control unit(220) connects to a plurality of BTSs(100) through the E1 line, receives the ATM E1 signals from a plurality of BTSs(100), detects a speed of the ATM E1 signals, and controls an output speed of the BEIA board(210) as 155M when the speed of the ATM E1 signals is the 155M speed. A 25M physical control unit(230) connects to a plurality of BTSs(100) through the E1 line, receives the ATM E1 signals from a plurality of BTSs(100), detects the speed of the ATM E1 signals, and controls the output speed of the BEIA board(210) as 25M when the speed of the ATM E1 signals is the 25M speed. A clock supply unit(240) supplies various system clocks to the BEIA board(210), the 155M physical control unit(220), and the 25M physical control unit(230). A router(250) performs an interface to be capable of performing an optical communication between the BEIA board(210), the 155M physical control unit(220), the 25M physical control unit(230), the clock supply unit(240), and a BSC(Base Station Controller)(300).

Description

ATM Switch Router Matching Device for IMT-2000 System {ATM SWITCH ROUTER INTERFACE DEVICE IN IMT-2000 SYSTEM}

The present invention relates to an Asynchronous Transfer Mode (ATM) switch router matching device in an International Mobile Telecommunication (IMT) -2000 system. In implementing an ATM switch router that handles an ATM interface between a base transceiver station (BTS) and a base transceiver station controller (BSC), a plurality of BEIA (BST E1 Interface Assembly) boards are referred to. The present invention relates to an ATM switch router matching device in an IMT-2000 system for implementing a 155M physical control unit, a 25M physical control unit, and a clock supply unit in the form of a single card and then mounting the same to an ATM switch router.

In the conventional IMT-2000 system, a BIS (BST Inerface Subsystem) matching device includes a plurality of AFDA (ATM Frame / Deframe Assembly; hereinafter referred to as "AFDA") boards 21 as shown in FIG. AIBB (ATM Interface Back Board; hereinafter referred to as "AIBB") board 22, AMDA (ATM Mux / Demux Assembly; referred to as "AMDA") board 23, and ATM switch router 30 It was.

The plurality of AFDA boards 21 are connected to each of a plurality of base stations 100 through an Unshield Twisted Pair copper line (UTP) line. The ATM signals are transmitted from the plurality of base stations 100, respectively. In order to accommodate the data service at the same time as receiving the input, the multiplexing and demultiplexing (Mux / Demux) operation is performed and then converted into a cell bus signal and output to the AIBB board 22.

Then, the AIBB board 22 receives a plurality of ATM signals output from the plurality of AFDA boards 21 and bundles them into one ATM signal to output to the AMDA board 23.

Subsequently, the AMDA board 23 receives an ATM signal from the AIBB board 22 and then performs a multi / demultiplex operation through a cell bus, and then 155 UNI (User-Network Interface) (hereinafter referred to as “UNI”). Pass through the chip to the ATM switch router (30).

However, the BIS matching device in the conventional IMT-2000 system described above is composed of an AFDA board, an AIBB board, an AMDA board, and an ATM switch router to accommodate ATM E1 signals received from a base station. As a result, there were many difficulties in design and manufacturing, and as a result, there was a problem in that the price increased economically and the price competitiveness with other companies was weakened.

As another problem, when the call volume increases, the BIS matching device not only has a double inconvenience of reconfiguring a circuit, but also has a problem in that maintenance and repair are difficult.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to transmit an ATM cell signal transmitted from a base station to a control station through an ATM switch router, thereby providing a BEIA board to an ATM switch router. The purpose of the present invention is to provide an ATM switch router matching device in an IMT-2000 system to increase efficiency in miniaturization and maintenance / management of the structure by mounting as a single card.

It is another object of the present invention to provide an ATM switch router matching device in an IMT-2000 system for making it applicable to a connection between systems or terminals / servers and an interface between a commercial ATM switch and a commercial ATM switch. .

It is another object of the present invention to provide an ATM switch router matching device in an IMT-2000 system for varying the number of BEIA boards according to the call volume by using BEIA boards built in card units in an ATM switch router. have.

That is, the present invention is connected to a plurality of base stations and the E1 line, the BEIA board receives the ATM E1 signal from the plurality of base stations and checks the error and separates and transmits each small cell unit at the same time;

It is connected to the plurality of base stations through the E1 line and receives the ATM E1 signal from the base station and detects the speed of the ATM signal. Then, if the speed of the ATM signal is 155M, the output speed of the BEIA board is 155M. 155M physical control unit for controlling;

It is connected to the plurality of base stations by E1 line, receives the ATM E1 signal from the base station and detects the speed of the ATM signal. Then, if the speed of the ATM signal is 25M, the output speed of the BEIA board is 25M. 25M physical control unit for controlling;

A clock supply unit configured to supply various system clocks to the BEIA board, a 155M physical controller, and a 25M physical controller; And

The BEIA board, a 155M physical control unit, and a 25M physical control unit, and a router for interfacing optical communication between the clock supply unit and the control station to provide an ATM switch router matching device in the IMT-2000 system.

1 is a functional block diagram showing the configuration of a BIS matching device in a conventional IMT-2000 system;

2 is a functional block diagram illustrating a configuration of an ATM switch router matching device in an IMT-2000 system according to an embodiment of the present invention;

<Explanation of symbols for main parts of the drawings>

200: ATM Switch Router 210: BEIA Board

211: ATM signal matching unit 212: ATM signal combining unit

213: ATM signal type conversion unit 214: logical interface unit

215: ATM signal control unit 220: 155M physical control unit

230: 25M physical control unit 240: clock supply unit

250: router

Hereinafter, an ATM switch router matching device in an IMT-2000 system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a functional block diagram showing the configuration of an ATM switch router matching device in an IMT-2000 system according to an embodiment of the present invention, and is an ATM switch router matching device in an IMT-2000 system according to an embodiment of the present invention. The ATM switch router 200, BEIA board 210, 155M physical control unit 220, 25M physical control unit 230, the clock supply unit 240, and the router 250 is composed of.

The BEIA board 210 receives ATM E1 cell signals from a plurality of base stations 100, checks for errors, and separates them into small cell units and transmits them to the router 250. The matching unit 211, the ATM signal combiner 212, the ATM signal type conversion unit 213, the logical interface unit 214, and the ATM signal control unit 215 are configured.

At this time, the above-described ATM E1 cell signal is composed of voice and text information in the form of AAL (ATM Adaptation Layer; AAL) -2 signal and control and address information in the form of AAL-5 signal. MESSAGE TRANSFER (hereinafter referred to as "MT") signal, base station signal, MT voice data, MT packet data and control signal.

The plurality of ATM signal matching units 211 mounted in the BEIA board 210 are connected to a plurality of base stations through an E1 line to receive a plurality of ATM E1 signals from the plurality of base stations 100 and then combine the ATM signals. It serves to transmit to the unit (212).

The ATM signal combiner 212 mounted in the BEIA board 210 receives a plurality of ATM E1 cell signals from the plurality of ATM signal matchers 212 and bundles them into one signal and simultaneously forms an ATM physical layer. After performing an interface function, it serves to transmit to the ATM signal type conversion unit 213.

In addition, the ATM signal type conversion unit 213 mounted in the BEIA board 210 receives a single ATM cell signal from the ATM signal combiner 212 and simultaneously converts the ATM cell signal into an AAL-2 type signal and an AAL. The logical interface unit 214 separates the -5 type signal, extracts the destination address information from the AAL-5 type cell signal, and adds the information packet, which is the destination address information, to the AAL-2 type cell signal. It serves to send.

The logical interface unit 214 mounted in the BEIA board 210 is connected to the router via an optical cable, and the speed is determined under the control of the 155M physical control unit 220 or the 25M physical control unit 230 and the ATM When receiving the AAL-2 type ATM cell signal from the signal type conversion unit 213, the ATM cell signal is transmitted to the router 250 according to the corresponding speed.

Meanwhile, the ATM signal controller 215 mounted in the BEIA board 210 controls the ATM E1 signal processing and transmission functions of the ATM signal combiner 212 and the ATM signal type converter 213.

On the other hand, the 155M physical control unit 220 is connected to the plurality of base stations 100 by the E1 line, receives the ATM E1 cell signals from the plurality of base stations 100 and at the same time detects the speed of the ATM cell signal After that, if the ATM signal speed is 155M, the BEIA board 210 controls the output speed to 155M.

In addition, the 25M physical control unit 220 is connected to the plurality of base stations 100 by the E1 line, and receives the ATM E1 cell signals from the plurality of base stations 100 and simultaneously detects the speed of the ATM cell signals. Then, if the speed of the ATM signal is 25M speed serves to control the output speed of the BEIA board 210 to 25M.

The 155M physical control unit 220 and the 25M physical control unit 230 perform photoelectric conversion, clock recovery and retiming functions as well as 155M / 25M physical layer ATM processing functions, as well as ATM layer processing functions. And a line buffer management function, and a cell speed matching function, a layer management function, an MPC processor function, an upper processor matching function, and a clock receiving function.

The clock supply unit 240 supplies various system clocks to the BEIA board 210, the 155M physical controller 220, and the 25M physical controller 230.

In addition, the clock supply unit 240 is a device that performs a network synchronization clock recovery function, a reference clock generation function, a reference clock distribution function, and a clock monitoring control function.

Meanwhile, the router 250 interfaces an optical communication between the plurality of BEIA boards 210, the 155M physical controller 220, and the 25M physical controller 230, the clock supply unit 240, and the control station 300. Play a role.

Next, an operation process of the ATM switch router matching device in the IMT-2000 system having the above configuration will be described with reference to FIG. 2.

First, the ATM signal matching unit 211 in the BEIA board 210 receives a plurality of ATM cell signals from the base station 100 through UTP and then performs an error processing function to the ATM signal combining unit 212. Output

At this time, the above-described ATM E1 cell signal is composed of voice and text information in the form of AAL-2 signal and control and address information in the form of AAL-5 signal, specifically, MT signal, base station signal, MT voice data, MT packet data. And control signals.

Then, the ATM signal combiner 212 receives a plurality of ATM cell signals from the ATM signal matcher 211 and bundles them into one signal, and then performs the ATM physical layer interface function and then the ATM signal type. Output to the converter 213.

Subsequently, the ATM signal type converting unit 213 receives a single ATM cell signal coupled by the ATM signal combiner 212, and the ATM signal type converting unit 213 converts the ATM cell signal into an AAL-2 type. Signal is divided into AAL-5 type packet information and control signal. Then, the destination address information is extracted from the AAL-5 type cell signal and the information packet, which is the destination address information, is added to the AAL-2 type cell signal. In addition, it outputs to the logical interface unit 214 via the cell bus.

At this time, the 155M physical control unit 220 receives the ATM E1 signal from the base station 100 and detects the speed of the ATM signal, and then outputs the BEIA board 210 if the ATM E1 signal speed is 155M speed. The speed is controlled to 155M.

In addition, the 25M physical controller 230 receives the ATM E1 signal from the base station 100 and detects the speed of the ATM signal, and then outputs the BEIA board 210 if the ATM E1 signal speed is 25M speed. The speed is controlled at 25M.

Then, the logical interface unit 214 determines that the ATM transmission rate is determined under the control of the 155M physical control unit 220 or the 25M physical control unit 230, and then the ATM cell of the AAL-2 type from the ATM signal type conversion unit 213. When the signal is received, the ATM cell signal is transmitted to the router 250 at the corresponding speed.

Subsequently, the router 250 interfaces the optical communication between the plurality of BEIA boards 210, the 155M physical controller 220, the 25M physical controller 230, the clock supplyer 240, and the control station, and performs an AAL-2 signal. Outputs

Meanwhile, the ATM signal controller 215 controls the ATM E1 signal processing and transmission functions of the ATM signal combiner 212 and the ATM signal type converter 213, and the clock supply 240 controls the BEIA board ( 210, the 155M physical controller 220, and the 25M physical controller 230 supply various system clocks.

According to the ATM switch router matching device in the IMT-2000 system of the present invention, in transmitting the ATM cell signal from the base station to the control station through the ATM switch router, the ATM switch router includes a plurality of BEIA boards, 155M physical controllers, and 25M physical. As it is mounted and used as a single card by combining a control unit and a clock supply unit, the structure is miniaturized, which is advantageous in terms of maintenance and management, and can function as a connection between systems or terminals / servers. It is used to interface between ATM switches, and by using BEIA board as card unit in ATM switch router, the number of BEIA boards can be changed according to the call volume.

Claims (2)

A BEIA board connected to a plurality of base stations through an E1 line, receiving an ATM E1 signal from the plurality of base stations, checking an error, and simultaneously separating and transmitting the data into small cell units; It is connected to the plurality of base stations through the E1 line and receives the ATM E1 signal from the base station and detects the speed of the ATM signal. Then, if the speed of the ATM signal is 155M, the output speed of the BEIA board is 155M. 155M physical control unit for controlling; It is connected to the plurality of base stations by E1 line, receives the ATM E1 signal from the base station and detects the speed of the ATM signal. Then, if the speed of the ATM signal is 25M, the output speed of the BEIA board is 25M. 25M physical control unit for controlling; A clock supply unit configured to supply various system clocks to the BEIA board, a 155M physical controller, and a 25M physical controller; And And a BEIA board, a 155M physical control unit, a 25M physical control unit, and a router for interfacing optical communication between the clock supply unit and the control station. The method of claim 1 The BEIA board may include: an ATM signal matching unit connected to a plurality of base stations through an E1 line and receiving and transmitting a plurality of ATM E1 signals from the plurality of base stations; An ATM signal combiner configured to receive a plurality of ATM E1 cell signals from the ATM signal matcher and simultaneously combine the signals into one signal to perform an ATM physical layer interface function; After receiving a single ATM cell signal from the ATM signal combiner, the ATM cell signal is divided into an AAL-2 type signal and an AAL-5 type signal, and then the destination address information is extracted from the AAL-5 type cell signal. An ATM signal type converting unit which extracts and transmits the information packet which is the destination address information to the cell signal of the AAL-2 type; The ATM cell signal is connected to the router through an optical cable, and when the speed is determined under the control of the 155M physical control unit or the 25M physical control unit, and an ALL-2 type ATM cell signal is received from the ATM signal type conversion unit, the corresponding ATM cell signal is applied. Logical interface unit for transmitting to the router at a speed; And And an ATM signal controller for controlling the ATM E1 signal processing and transmission function of the ATM signal combiner and the ATM signal type converting unit.