KR20010057401A - Apparatus and method for ADSL subscriber having multi ADSL ports - Google Patents

Abstract

PURPOSE: An ADSL subscriber apparatus having a multi-ADSL port and a control method thereof are provided to implement an ADSL model having a plurality of ADSL ports in an ADSL system based on ATM and perform a wide band data transceiving operation. CONSTITUTION: A plurality of ADSL ports(20) receive ADSL data from a telephone line and converts the ADSL data into ATM type data. An ATM handler(30) is connected with the ADSL ports(20) and multiplexes the converted ATM type data. An ATM-25 unit(40) transmits the multiplexed ATM cell stream based on the ATM-25 interface. A port ID generator(50) is connected with the ATM handler(30) and classifies the ports based on the ADSL ports(20). A controller(60) is connected with the ADSL port(20), the ATM-25 unit(40) and the port ID generator(50) through an address latch and data buffer, and controls the transmission path of the data.

Description

Apparatus and method for ADSL subscriber having multi ADSL ports}

The present invention relates to an Asymmetric Digital Subscriber Line (ADSL) subscriber device and a control method thereof, and more particularly, to an ADSL system having multiple ADSL ports in an ADSL system based on ATM (Asynchronous Transfer Mode). The present invention relates to an ADSL subscriber apparatus having a multi-ADSL port for enabling broadband data transmission / reception and a control method thereof.

In general, ADSL uses conventional telephone lines (twisted copper lines) to achieve 1.5Mbits / sec (or 6Mbits / sec) in the direction of descending from the telephone company to the home and 16kbits / sec in the up direction (asymmetrical). It is a technology that can. Thus, the same phone line can coexist with existing telephones or the basic interface (2B + D) of the Integrated Services Digital Network (ISDN). The ADSL is used as an experimental service of "Video Dialtone", which is a video transmission service of a US local telephone recall. Here, the downlink data rate of ADSL is generally 6Mbps or less, and the uplink data rate is 640Kbps. Thus, ADSL can provide one-to-one correspondence between the telephone company and subscribers, providing T1-class Video On Demand (VOD) service and telephone service simultaneously without errors.

There are two conventional methods for determining the ADSL data rate. One is the rate adaptive method. The ADSL line status of the modem (ATU-C, ADSL Terminal Unit Central Office) on the DSLAM side and the subscriber side modem (ATU-R, ADSL Terminal Unit Receive Office) are automatically This is a method of determining the data transmission speed by training. The other is the fixed rate method, in which the user sets the desired speed to four options, and the ADSL modem on both ends checks the ADSL line status to see if the four options are valid and shows the highest performance. Optionally, the data rate is determined.

1 is a block diagram of a conventional ADSL modem.

As shown in FIG. 1, reference numeral 1 denotes an RJ-11 receiving data from a POTS separation unit that separates a call signal, an ADSL data, and a control signal of a POTS from a signal received from an ATM network, and 2 represents an ADSL port. Is a line driver located in the ADSL port to compensate for noise and signal distortion, 4 is an analog front end, 5 is a discrete multitone modulation (DMT) transceiver that performs digital / analog conversion and modulation / demodulation functions, and 6 is ATM It is a framer that forms a frame, 7 is a DSP processor that processes digital signals, and 8 is a flash memory.

In addition, reference numeral 9 is an interleaved memory for storing interleaved data from data of the ADSL port 2, 10 is a cell delineation block (CDB) describing a cell, and 11 is a CDB and UTOPIA (Universal Test and Operations Physical Interface). Asynchronous Transfer Mode Forum (ATMF) that performs a for ATM (ATM) interface, 12 is an LED display, 13 is an Internal Direct Memory Access (IDMA) bus interface, and 14 is a utility bus interface.

Reference numeral 15 is an address latch and data bus buffer, 16 is a microprocessor, 17 is a DRAM (Dynamic Random Access Memory), 18 is a flash ROM, and 19 is a serial interface.

As described above, in the related art, one ADSL modem is configured to have one ADSL port 2.

However, this conventional technology has a limitation that there is no way to handle this when two or more ADSL ports are connected.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to implement a wideband data transmission and reception by implementing an ADSL modem having a plurality of ADSL ports in an ADSL system based on ATM. The present invention provides an ADSL subscriber device having multiple ADSL ports and a control method thereof.

In order to achieve the above object, an ADSL subscriber apparatus having a multi ADSL port according to an embodiment of the present invention,

A plurality of ADSL ports for receiving ADSL data from a telephone line and converting the data into ATM data; An ATM handler connected to the plurality of ADSL ports and multiplexing the converted ATM data; An ATM-25 coupled to the ATM handler for transmitting a multiplexed ATM cell stream to an ATM-25 interface; A port ID generation unit connected to the ATM handler and configured to classify ports so that control can be performed for each of the plurality of ADSL ports; The technical configuration is characterized by being connected to the ADSL port, the ATM-25 unit, and the port ID generation unit through an address latch and a data buffer, and configured to control a transmission path of data.

In order to achieve the above object, a control method of an ADSL subscriber apparatus having a multi ADSL port according to an embodiment of the present invention is provided.

If the ADSL data is input, performing an interface in units of bytes, performing a cell description, and checking an HEC; Descrambling an ATM payload after the HEC check, extracting filtering and PLOAM of an idle cell, performing header translation, and then multiplexing an ATM cell; After the multiplexing of the ATM cells, an ATM cell is extracted, an ATM cell is inserted, a forward cell is input to an output buffer, and the UTOPIA interface is characterized in that the ATM cell is outputted.

In order to achieve the above object, a control method of an ADSL subscriber apparatus having a multi ADSL port according to an embodiment of the present invention is provided.

If the ATM cell is input through the UTOPIA interface, checking the HEC and then extracting the ATM cell; Translating a header in the extracted ATM cell, performing switching, and inserting an idle cell to generate an HEC; The technical configuration is characterized by performing an ATM payload scrambling in the HEC-generated ATM cell, inserting a BIP8 code, and performing an interface of a byte unit to output ADSL data.

1 is a block diagram of a conventional ADSL modem,

2 is a block diagram of an ADSL subscriber apparatus having multiple ADSL ports according to an embodiment of the present invention;

3 is a detailed block diagram of an ADSL port in FIG.

4 is a detailed block diagram of a port ID generator of FIG. 2;

5 is a flowchart illustrating a method for converting an ADSL into an ATM cell in a control method of an ADSL subscriber device having multiple ADSL ports according to an embodiment of the present invention;

6 is a flowchart illustrating a method of converting an ATM cell into an ADSL in a control method of an ADSL subscriber device having multiple ADSL ports according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

20: ADSL port 30: ATM handler

40: ATM-25 part 50: port ID generation unit

60 control unit 61 microprocessor

62: DRAM 63: flash ROM

64: serial line interface unit

Hereinafter, an embodiment according to the technical spirit of the ADSL subscriber apparatus having the multi-ADSL port of the present invention and a control method thereof as described above are as follows.

First, the present invention relates to a subscriber device modem of an asymmetric optical subscriber transmitter (ADSL) capable of transmitting data of about 8 Mbps downward and about 1 Mbps upward by using a conventional telephone line. It is configured to transmit and receive data up and down by connecting lines, but in the present invention, it has n ADSL functions in one modem, so that it can receive n lines from the outside, and internally multiplexes at ATM layer. This allows more wideband data transmission and reception, and provides a block that performs port classification function between the control unit and the ADSL function block for control or configuration of each port.

2 is a block diagram of an ADSL subscriber device having multiple ADSL ports according to an embodiment of the present invention.

As shown here, a plurality of ADSL ports 20 for receiving ADSL data from a telephone line and converting the data into ATM type data; An ATM handler 30 connected to the plurality of ADSL ports 20 for multiplexing converted ATM data; An ATM-25 unit (40) coupled to the ATM handler for transmitting a multiplexed ATM cell stream to an ATM-25 interface; A port ID generation unit (50) connected to the ATM handler (30) and configured to identify ports so that control can be performed for each of the plurality of ADSL ports (20); The control unit 60 is connected to the ADSL port 20, the ATM-25 unit 40, and the port ID generation unit 50 through an address latch and a data buffer, and controls a data transmission path.

Where reference numeral 61 is a microprocessor, 62 is a DRAM, 63 is a flash ROM, and 64 is a serial interface.

In the above, the control unit 60 receives ADSL data from the plurality of ADSL ports 20, receives them into an ATM cell, multiplexes them into one, and receives an ATM cell stream in the reverse direction and outputs the ADSL port according to the ID of the ATM cell. Control to export (20) separately.

3 is a detailed block diagram of an ADSL port in FIG.

As shown here, reference numeral 21 is a line driver located in the ADSL port to compensate for noise and signal distortion, 22 is an analog front end, 23 is a DMT transceiver that performs digital / analog conversion and modulation / demodulation functions. 24 is a framer that forms ATM frames, 25 is a DSP processor that processes digital signals, and 26 is a flash memory.

4 is a detailed block diagram of a port ID generator of FIG. 2.

As shown therein, a port recognition unit 51 for recognizing the plurality of ADSL ports 20; A microprocessor interface unit 52 connected to the port recognizing unit 51 and configured to transmit a control signal to only a desired port so as to distinguish and control a port to be controlled; Port information storage unit 53 is connected to the microprocessor interface unit 52 and stores port information.

In the above, the port ID generation unit 50 controls access to only one ADSL port for controlling the plurality of ADSL ports 20 or collecting alarm data, and selects a specific port to the corresponding port. Only the signal is controlled to be output, and when an alarm signal is generated in the plurality of ADSL ports 20, which ADSL port is a signal that is distinguished and notified to the controller 60.

5 is a flowchart illustrating a method of converting an ADSL into an ATM cell in a control method of an ADSL subscriber device having multiple ADSL ports according to an embodiment of the present invention.

As shown in FIG. 11, when the ADSL data is input, performing an interface in units of bytes, performing cell delineation, and checking HEC (Header Error Control) (ST11) (ST12); ; Descrambling the ATM payload after checking the HEC, extracting filtering of idle cells and physical layer operation and maintenance (PLOAM), performing header translation, and then multiplexing ATM cells (ST13 to ST16); After the multiplexing of the ATM cells, the ATM cells are extracted, the ATM cells are inserted, the ATM cells are input to the output buffer as forward cells, and the UTOPIA interface is outputted (ST17) (ST18).

6 is a flowchart illustrating a method of converting an ATM cell into an ADSL in a control method of an ADSL subscriber device having multiple ADSL ports according to an embodiment of the present invention.

As shown in the drawing, when an ATM cell is input through the UTOPIA interface, a step of checking the HEC and then extracting the ATM cell (ST21) (ST22); Translating the headers in the extracted ATM cells, performing switching, and inserting idle cells to generate a HEC (ST23 to ST26); Performing ATM payload scrambling in the HEC-generated ATM cell, inserting a BIP (Bit Interleaved Parity) code, and outputting ADSL data by performing a byte-by-byte interface (ST27) (ST28) Perform

The operation of the ADSL subscriber apparatus having the multi ADSL port and the control method according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the present invention has n ADSL ports externally, and multiplexing for n ADSL lines is implemented with an ATM multiplexer in the ATM layer. Finally, the multiplexed data can be delivered to an ATM-25 interface. In addition, a port ID generation unit 50 for performing port classification so as to distinguish n ports is provided, and each port can be controlled.

Thus, the plurality of ADSL ports 20 receives ADSL data from the telephone line and converts the data received by the ADSL into ATM data, and multiplexes / demultiplexes the ADSL channel, framing / deframing, DMT modulation / demodulation, and A /. Perform D, D / A conversion and filtering.

The ATM handler 30 performs a UTOPIA interface, cell description, and cell payload scramble / descramble to multiplex the converted ATM data.

ATM-25 unit 40 transmits multiplexed ATM cell streams to ATM-25 interface, UTOPIA interface, 4B / 5B coding / decoding, HEC checking / creation, Non Return to Zero (NRZ) / NRZI (Non Return to Zero Inverted) Coding / decoding is performed.

The control unit controls the data transfer path, and includes a microprocessor 61, a memory unit 62, 63, and a serial interface 64 that performs an external serial interface.

The port ID generation unit 50 performs a division function for control of each port, and distinguishes a port to be controlled.

Referring to the operation of the present invention in more detail as follows.

ADSL data input through the telephone line is ADSL channel multiplexed / demultiplexed, framed / de-framed, and DMT modulated / demodulated via a plurality of ADSL ports 20 for A / D, D / A conversion and filtering. do. At this time, the final ATM cell has a UTOPIA interface.

The ATM handler 30 multiplexes ATM cells having different IDs output from the plurality of ADSL ports 20 into one ATM cell stream, and transmits data to the ATM-25 unit 40 through the UTOPIA interface. The ATM cell multiplexing of the ADSL port 20 is performed.

ATM handler 30 also performs the reverse processing in the case of transmission. That is, ports are classified into ATM cells from the ATM-25 unit 40 using respective port ID information, and the ATM cells are output to the corresponding ports. Therefore, the output ATM cell of the ATM-25 unit 40 is classified into a cell ID having an ATM cell, and the ATM cell is classified and demultiplexed and sent to the corresponding ADSL port 20.

The ATM-25 unit 40 receives an ATM cell of the UTOPIA interface output from the ATM handler 30 through the UTOPIA interface, performs 4B / 5B coding / decoding, performs HEC check / generation, and performs NRZ / NRZI. Coding / decoding is performed to transmit, and at the time of transmission, the reverse processing is performed.

The control unit 60 performs an ADSL function in the ADSL port 20, an ATM multiplexing function in the ATM handler 30, and supports and controls a function necessary for the ATM-25 unit 40 to perform a function. .

The port ID generation unit 50 has a function of transmitting a control signal only to a desired port so as to control the ports to be controlled and an interface function for simultaneously controlling n ports for receiving alarm signals.

As described above, the present invention implements an ADSL modem having several ADSL ports in an ATM-based ADSL system, thereby enabling wideband data transmission and reception.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, an ADSL subscriber device having a multi-ADSL port and a control method thereof according to the present invention have n ADSL ports in an ADSL subscriber modem and perform multiplexing in an ATM layer to improve data transmission capability of an ATM-25 interface. It can be increased by n times, which cannot be realized by simply configuring n ports, and has a special effect.

In addition, the present invention has a much more economical industrial use effect than having a plurality of modems because it can be used to configure a network in one system even where several modems are required.

In addition, the present invention has the advantage that can be used by sharing the power supply or control unit.

Claims (6)

A plurality of ADSL ports for receiving ADSL data from a telephone line and converting the data into ATM data; An ATM handler connected to the plurality of ADSL ports and multiplexing the converted ATM data; An ATM-25 coupled to the ATM handler for transmitting a multiplexed ATM cell stream to an ATM-25 interface; A port ID generation unit connected to the ATM handler and configured to classify ports so that control can be performed for each of the plurality of ADSL ports; And an ADSL port, an ATM-25 unit, and a port ID generation unit through an address latch and a data buffer, and a control unit configured to control a transmission path of data. The method of claim 1, wherein the control unit, Receives ADSL data from the plurality of ADSL ports, receives them into an ATM cell, multiplexes them into one, and receives one ATM cell stream in the reverse direction, and controls to separate and output the output ADSL port according to the ID of the ATM cell. An ADSL subscriber device having multiple ADSL ports. The method of claim 1, wherein the port ID generation unit, Control to access only one ADSL port for control or collection of alarm data for the plurality of ADSL ports, and control only output signals to the corresponding port when a specific port is selected, the alarm signal is the plurality of ADSL The ADSL subscriber device having a multi ADSL port, characterized in that the ADSL port to distinguish the signal from the ADSL port to occur when generated in the port. The method of claim 1, wherein the port ID generation unit, A port recognition unit recognizing the plurality of ADSL ports; A microprocessor interface unit connected to the port recognition unit and configured to transmit a control signal to only a desired port so as to distinguish and control a port to be controlled; And a port information storage unit connected to the microprocessor interface unit to store port information. If the ADSL data is input, performing an interface in units of bytes, performing a cell description, and checking an HEC; Descrambling an ATM payload after the HEC check, extracting filtering and PLOAM of an idle cell, performing header translation, and then multiplexing an ATM cell; Extracting the ATM cell after the multiplexing of the ATM cell, inserting the ATM cell, and inputting the ATM cell to the output buffer so that the UTOPIA interface is outputted to the ADSL subscriber having multiple ADSL ports; Control method of the device. If the ATM cell is input through the UTOPIA interface, checking the HEC and then extracting the ATM cell; Translating a header in the extracted ATM cell, performing switching, and inserting an idle cell to generate an HEC; Performing the ATM payload scramble in the HEC-generated ATM cell, inserting a BIP8 code, and performing an interface of a byte unit to output ADSL data; Way.