KR20000033404A - Adsl subscriber terminal for atm - Google Patents

Abstract

PURPOSE: An ADSL(asymmetric digital subscriber line) subscriber terminal is provided to service multimedia application programs of high speed by directly accessing in the ADSL subscriber terminal of an ATM(asynchronous transfer mode) exchange. CONSTITUTION: An ATM(asynchronous transfer mode) subscriber interface module(100) performs an accessing function of ADSL line by composing of an ATM layer processor(110) to communicate with a switching network, to distribute by mixing and dividing a clock with receiving a synchronous signal, to process an OAM function(operation, administration and maintenance) and to manage a subscriber and an ADSL(asymmetric digital subscriber line) subscriber processor(120) of 16boards to accept four ADSL subscribers for each board. The ATM layer processor(110) sends a starting signal of transmitting cell to inform the start of 16bit data and the transmitting cell into the ADSL subscriber processor(120) through a transmitting/receiving cell bus. When the starting signal of receiving cell to inform the start of receiving 16bit data, the receiving cell and the requesting signal of cell receiving to request the receiving of cell from the ADSL subscriber processor(120), the ATM layer processor sends a permitting signal of cell receiving to permit the receiving of cell to the ADSL subscriber processor(120) requesting the receiving of cell. An ADSL subscriber terminal for an ATM(120) is accessed with an ATM switching board through an ADSK line(200) and offers an ATM data service of high speed by processing a transmitted and received ATM cell.

Description

Asymmetric Digital Subscriber Line Subscriber Terminal for Asynchronous Transmission Mode

The present invention can be connected directly to the Asymmetric Digital Subscriber Line (hereinafter referred to as ADSL) subscriber processing unit of the Asynchrous Transfer Mode (hereinafter referred to as ATM) switching system to service high-speed multimedia applications. The present invention relates to an ADSL subscriber station.

Conventionally, in configuring an ATM subscriber station for connecting to an ATM switching system, the ADSL processing unit and a device for converting ATM data to Ethernet data are connected to the subscriber station, which is complicated in configuration and management. There were many problems, and since these devices were separated from each other, there was a problem in that the host of the subscriber station device did not control or knew the status.

In order to solve the above problems, the present invention is to provide a variety of multimedia applications with a high data rate to the remote ATM subscriber that is directly connected to the ADSL subscriber processing unit of the ATM switch. An object of the present invention is to construct an ADSL subscriber station including a ATM terminal matching card in the form of a process control interface (PCI) bus card.

According to the above, the present invention is an ADSL subscriber station for ATM that is directly connected to an asymmetric digital subscriber line (ADSL) subscriber processing device of an ATM switching system, and the connection of an ADSL subscriber station matching card is directly connected to a PCI bus of a host to ADSL. It is possible to connect the line, directly control the whole terminal device from the host or monitor the status, and can install the software of various ATM terminal functions so that the ADSL subscriber terminal device can serve various multimedia applications at high speed. You can do it.

In order to achieve the above object, the present invention is connected to a PCI bus controller and stores user data or various application programs, the host memory 311, the host memory and the central controller and the PCI bus and controls the use of the PCI bus PCI bus controller 312, the host 310 is composed of a central controller 313 connected to the PCI bus controller and having a processor to control the host and PCI bus peripherals, and performs a connection function with a terminal, the PCI bus Connected to the ADSL line 200 and connected to the ADSL line 200 to perform data transmission and signal level conversion through the line and ADSL line access subscriber terminal matching card connected to the debugging terminal through its own RS-232C port ( 320) A voice signal or a video signal of an application program that is connected to the PCI bus and The voice image processing card 330 performs a function of outputting a monitor screen, and is connected to the central controller of the host to perform a function of remotely controlling a program running on the host using a remote controller instead of a keyboard or a mouse. It characterized in that it comprises a remote control matching unit 340.

1 is a subscriber terminal device connection configuration diagram of an ATM switching system according to the present invention;

2 is a block diagram of an ADSL subscriber station to which the present invention is applied;

3 is a block diagram of an ADSL subscriber station matching card according to the present invention.

* Explanation of symbols for main parts of the drawings

100: ADSL subscriber matching module 110: ATM layer processing device

120: ADSL subscriber processing unit 130: transmit / receive cell bus

140: control signal bus 200: ADSL line

300: ATM subscriber terminal device 310: host

311: host memory 312: PCI bus controller

313: central controller 320: ADSL subscriber station matching card

321: ATM divided assembly layer processing unit 322: memory unit

323: ATM physical layer processing unit 324: command and status unit

325: ADSL processing unit 330: audio image processing card

340: remote control matching unit 350: PCI bus

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

1 is a block diagram of a subscriber station of an ATM switching system according to the present invention, which is connected to an ADSL subscriber processing apparatus 120 that forms an ADSL subscriber matching module 100 of an ATM switching system together with an ATM layer processing apparatus 110. Subscriber terminal 300 is connected to the ADSL line 200 is configured to provide an ATM service.

The ATM subscriber matching module 100 communicates with the switch network, receives a synchronous signal from the switch network, divides the clock, divides and distributes it, handles an operation maintenance function, and manages an ATM layer processing apparatus 110; It consists of 16 board ADSL subscriber processing unit 120 accommodating 4 ADSL subscribers per board to perform the ADSL line connection function.

The ATM layer processor 110 communicates with the subscriber switch network module via differential signal serial data of 187.79 Mbps.

The ATM layer processing apparatus 110 transmits a transmission cell 16-bit data and a transmission cell start signal indicating the start of the transmission cell to the ADSL subscriber processor 120 through the transmission / reception cell bus, and receives the reception cell 16-bit data and reception. When receiving the cell start signal indicating the start of the cell and the cell reception request signal requesting the reception of the cell from the ADSL subscriber processing unit 120, polling is allowed to allow the cell reception to the ADSL subscriber processing unit 120 requesting the reception of the cell. Send a signal to allow cell reception.

If the received cell is an operation maintenance (Operation, Administration and Maintenance, hereinafter referred to as OAM) cell, it processes the operation maintenance function and sends a response OAM cell to the ADSL subscriber.

The control signal bus transmits and receives an address signal, a data signal, an address valid signal, a data valid signal, and a data read / write signal to access both ports RAMs in the ADSL subscriber processor 120.

In addition, the function alarm signal and hernia alarm signal of the ADSL subscriber processor 120 is received from the ADSL processor.

In addition, the synchronization signal (46.9494MHz) is received from the subscriber switch network module to perform clock synthesis and division to synchronize the clock in the ADSL subscriber matching module 100 with the main clock (23.4747MHz) and the synchronization of the transmit / receive cell buses. The cell bus clock (11.7373 MHz) is supplied to the ADSL subscriber processor 120.

The ADSL subscriber processing apparatus 120 receives the transmitting cell 16-bit data and the transmitting cell start signal from the ATM layer processing apparatus 110 and transmits the receiving cell 16-bit data and the receiving cell start signal through the transmitting / receiving cell bus. Sent to layer treatment device 110.

In addition, a cell reception request signal for requesting reception of a cell is transmitted to the ATM layer processing apparatus 110, and a cell reception permission signal is received.

The control signal bus receives an address signal, an address valid signal, a data valid signal, and a read / write signal from the ATM layer processing apparatus 110 in order to match both ports, and transmits and receives data signals.

In addition, the function alarm signal and the hernia alarm signal is sent to the ATM layer processing unit 110, the main clock and the cell bus clock is supplied.

In order to connect with the ADSL subscriber station 300 for ATM, the ADSL frame data is transmitted and received by being connected to the ADSL line 200 of two lines.

The ATM ADSL subscriber station 120 includes a host memory 311, a PCI bus controller 312, a host 310 including a central controller 313, an HDSL line connection subscriber terminal matching card 320, and audio image processing. Card 330, the remote control matching unit 340 is connected to the ATM switch via the ADSL line 200, and performs the function of providing a high-speed ATM data service by processing the ATM cell transmitted and received.

2 is a block diagram of an ADSL subscriber station device to which the present invention is applied, and includes a host 310 using a computer or a workstation, a PCI bus 350 connected to the host 310, and a PCI bus 350. Connected to communicate with the host 310, ADSL terminal matching card 320 to perform data transmission and level conversion via the line, and the PCI bus 350 is connected to the process of processing the audio signal or video signal monitor The audio image processing card 330 outputs a screen, and a remote control matching unit 340 connected to the host 310 and the central controller 313 to provide a remote control function.

The host 310 may be a personal computer or a workstation, and may be connected to the PCI bus controller 312 and have a host memory 311 having a capacity of 64 M bytes or more of a 32-bit word storing user data or various applications. PCI bus 350 is connected to the host memory 311 and the central controller 313 and the PCI bus 350 when the host 310 or the PCI bus peripheral device transmits / receives data through the PCI bus 350. PCI bus controller 312 that controls the priority according to the priority request, and is connected to the PCI bus controller 312 is provided with a processor to control the host and PCI bus peripherals, and to perform various applications, The central controller 313 performs a host function of the ADSL subscriber station by performing a connection function between the terminal and the access function and the remote control matching unit 340.

The remote control matching unit 340 is connected to the central controller 313 of the host 310 and performs a function of remotely controlling a program running on the host 310 using a remote controller instead of a keyboard or a mouse. do.

The audio image processing card 330 is connected to the PCI bus 350 to process a voice signal or a video signal of an application program executed in the host 310 and to output the same to a monitor screen.

The ADSL subscriber station matching card 320 is connected to the PCI bus 350 to communicate with the host 310, and is connected to the ADSL line 200 to perform data transmission / reception and signal level conversion functions through the line. It is connected to the debugging terminal through the RS-232C port.

3 is an ADSL subscriber terminal matching card configuration diagram according to the present invention is connected to the host 310 through the PCI bus 350 and connected to the ADSL line 200 through the subscriber line, is connected to the PCI bus 350 It is connected to the host 310 and the ATM partition assembly processing unit 321 for transmitting control signals to the peripheral devices, and the ATM partition assembly processing unit 321 is connected to the memory bus through the address bus and data bus The memory unit 322 which stores the packet to be divided received from the host 310 or the ATM cell to be assembled received from the ATM physical layer processing unit 323 and various user data under the control of the ATM splitting layer processing unit 321. And an ATM cell inputted from the ADSL processor 325 through an ATM bus and a utility bus connected to the ATM divided assembly layer processor 321 and a universal test operation physical layer ATM matching (UTOPIA) bus, which is an ATM physical layer standard bus. Processed according to the standard and delivered to the ATM splitter layer processor 321 through the UTOPIA bus, or the reverse function, and mutually with the host 310 through a utility bus connected to the ATM splitter layer processor 321. A command and status unit 324 connected to the ATM physical layer processing unit 323 to communicate with the ATM splitting layer processing unit 321 to store contents of instructions from a host, and to store status contents of the ADSL processing unit 325. And, it is connected to the ATM physical layer processing unit 323, converts the TTL-level ATM cell serial transmission and reception data into ADSL frame data, and is connected to the command and status unit 324 to send and receive command and status information, ADSL processing unit 325 having RS-232C matching with the terminal for debugging.

First, the ATM splitting layer processing unit 321 is connected to the host 310 through the PCI bus with the 32-bit address combined data signals AD31 to AD0 and various control signals.

The control signals include the bus command signals C / BE3 to C / BE0 of the PCI bus 350, the even parity signal PAR of the address combined data signal and the bus command signal, and the cycle frame signal FRAME ^* which is the start and duration of the access. ), Target ready signal (TRDY ^* ), sender ready signal (IRDY ^* ), transaction stop signal (STOP ^* ), device select signal (DEVSEL ^* ), initialization device signal (IDSEL ^* ), parity error signal (PERR ^* ), System error signal (SERR ^* ), PCI bus request signal (REQ ^* ), PCI bus enable signal (GNT ^* ), host interrupt request signal (INT ^* ), PCI bus clock signal (CLK), PCI bus reset There is a signal RST ^* .

The memory unit 322 includes the ATM partition layer processing unit 321, 17-bit memory address signals SA16 to SA0, 32-bit memory data signals SD31 to SD0, memory data write signals RWE ^* , and memory data. The read signal ROE ^* and the memory selection signal RCS ^* may be connected to store packet data or ATM cell data in the memory, or may transmit data in the memory to the ATM partition layer processor 321.

The ATM physical layer processing unit 323 is connected to the ATM partition layer processing unit 321 through a UTOPIA bus and a utility bus, and is connected to various control signals to communicate with each other.

The control signal includes a transmission data signal TxD7 to TxD0, a transmission cell start signal TxSOC ^* , a transmission possible signal TxEN ^* , a transmission fill signal TxFULL ^* , a transmission data clock signal TxCLK, and a transmission parity signal ( TxPAR) connected to each other, and receive data signal (RxD7 ~ RxD0), receiving cell start signal (RxSOC ^* ), receiveable signal (RxEN ^* ), receive empty signal (TxEMPTY ^* ), receive data clock signal (RxCLK) are connected to each other, of the 8-bit address bus utility combined data signal (UAD7~UAD0) and data signals which are read-control signal (URD ^*), write data signal (UWR ^*), address latch signal (UALE ^*), a chip select signal Connect with each other (UCS1 * ~ UCS0 ^* ).

In addition, the ADSL processor 325 is configured as the ATM physical layer processor 323 and the serial transmission data signal TDAT, the serial transmission data clock signal TCLK, the serial reception data signal RDAT, and the serial reception data clock signal RCLK. ATM cell data is transmitted and received, and is connected to the command and status unit 324 by an external 8-bit data signal D7 to D0, an external data read signal RD ^* , and an external data write signal WR ^* . It receives a command from the host 310 or transmits a status, and is connected to an ADSL line as an ADSL frame signal, and performs ADSL processing for ADSL framing and deframing of TTL level data, ADSL coding, and decoding. It has RS-232C matching with terminal with asynchronous transmission / reception data.

The command and status unit 324 is connected to the ATM splitting layer processing unit 321 through the address combined data signals UAD7 to UAD0 and the data write signal UWR ^* and the data read signal URD ^* of the utility bus. The command from the host 310 is stored, and the state from the ADSL processor 325 is read.

Read the contents of the state stored in connection with the ADSL processing unit 325 through the external data signals D7 to D0, the external data read signal RD ^* , and the external data write signal WR ^* . Write it.

The ADSL subscriber station device 300 configured as described above is connected to the ATM switching system through the ADSL line 200, and provides data of various speeds so that subscribers at a distance can receive high-speed ATM multimedia services. Perform the device function.

As described above, the present invention can be directly connected to the ADSL processing apparatus of the ATM switching system, and since there is no conversion device in the middle, the configuration is simple, the host can be directly controlled and managed, and various high speeds according to the application program. It is effective to receive ATM application service.

Claims (3)

An asymmetric digital subscriber line (ADSL) line access subscriber station in an asynchronous transmission mode (ATM) subscriber station, A host using a computer or workstation; A process control matching (PCI) bus coupled with the host; An ADSL terminal matching card for ATM connected to the process control matching bus to communicate with the host and perform data transmission / reception and signal level conversion through a line; An audio image processing card connected to the PCI bus to process an audio signal or an image signal and output the audio signal to a monitor screen; And a remote control matching unit connected to the host to provide a remote control function. The method of claim 1, The host, A host memory coupled to a process control matching (PCI) bus controller for storing user data or various application programs; A PCI bus controller coupled to the host memory, a central controller, and a PCI bus and controlling a right of use of the PCI bus; And a central controller coupled to the PCI bus controller and having a processor to control a host and a PCI bus peripheral device and to perform a connection function with a terminal. The method of claim 1, The ADSL subscriber station matching card, An ATM partition assembly layer processor connected to a processor control matching (PCI) bus to communicate with a host and to send control signals to peripheral devices; An ATM cell to be assembled and a variety of ATM cells received from an ARM physical layer processing unit received from a host under the control of an ARM partitioning layer processing unit connected to the ATM partitioning layer processing unit through a memory bus and a data bus. A memory unit for storing user data; The ATM splitting layer processing unit is connected to the universal test operation physical layer ATM matching (UTOPIA) bus and utility bus, which is an ATM physical layer standard bus, and processes the ATM cells input from the ADSL processing unit according to the ATM physical layer standard to divide the ATM through the UTOPIA bus. An ATM physical layer processor for transmitting to the assembly layer processor or processing the reverse function, and communicating with the host through an ATM split assembly layer processor and a utility bus; A command and status unit connected to the ATM splitting layer processing unit to store command contents from a host, and store state contents of an ADSL processing unit; It is connected to the ATM splitting layer processing unit, and converts ATM cell serial transmission and reception data of a transistor-transistor logic (TTL) level into ADSL frame data, and is connected to the command and state unit to send and receive command and status information, An asymmetric digital subscriber line subscriber station for asynchronous transmission mode, characterized in that the ADSL processing unit having RS-232C matching with the terminal for debugging.