KR20010063817A - Universal Asymmetric Digital Subscriber Line Terminal Unit - Google Patents

Abstract

PURPOSE: An asymmetric digital subscriber line(ADSL) terminal for general purpose is provided to allow both ATM transfer mode service and Ethernet mode service to be implemented by equipping an ADSL terminal with both an ATM transfer mode and an Ethernet matching mode. CONSTITUTION: An Ethernet matching part(20) provides an Ethernet port function. An ATM matching part(25) provides an Utopia port function. A main control device(22) provides the Utopia port and Ethernet port, segments/reassembles ATM cells inputted from the Utopia port, and controls a terminal. An ADSL matching part(23) matches signals inputted from the Utopia port and serial communication port to an ADSL under the control of the main control device(22). A telephone number separating part(24) passes the signals inputted from the ADSL matching part(23) through a low pass filter, and separates speech telephone signal.

Description

Universal Asymmetric Digital Subscriber Line Terminal Unit

The present invention relates to a universal asymmetric digital subscriber line (hereinafter referred to as "ADSL") terminal device.

The present invention relates to a universal asymmetric digital subscriber line (hereinafter referred to as "ADSL") terminal device.

In the prior art, a subscriber of a general modem (56/64 Kbps modem, 128 Kbps ISDN modem) using a conventional twisted pair cable has a high resolution image due to the speed limitation in receiving a multimedia service. Or it was impossible to receive and execute high quality sound in real time.

To run high quality video or audio in real time, it must be transmitted at a minimum speed of 1M. Currently, a method of using an ADSL terminal device (downlink speed: 1.5Mbps ~ 7Mbps, uplink speed: 64Kbps ~ 960Kbps) has been studied, and various attempts such as interworking methods between ADSL terminals and ATM networks have been made.

The present invention has been made to meet the requirements of the above-described ADSL terminal apparatus, and provides an ADSL terminal apparatus capable of providing high-speed Internet and high-speed multimedia access service to Ethernet subscribers using both Ethernet matching and ATM25 matching. Its purpose is to.

1 is an exemplary configuration diagram of a system to which a universal asymmetric subscriber line terminal apparatus according to the present invention is applied.

2 is a block diagram of an embodiment of an asymmetric digital subscriber line terminal device according to the present invention;

Figure 3 is a detailed configuration diagram of one embodiment of the Ethernet matching unit of Figure 2 in accordance with the present invention.

Figure 4 is a detailed configuration diagram of one embodiment of the ATM25 matching unit of Figure 2 according to the present invention.

Explanation of symbols on the main parts of the drawings

11: ATM switch or digital subscriber line access multiplexing device

12: terminal device 13, 21: ATM25 matching unit

14, 20: Ethernet matching unit 16: Telephone signal separation unit

18, 19: subscriber premises device 22: main controller

23: ADSL matching unit 24: telephone signal separation unit

25: monitor matching section 26: flash ROM

27: Dynamic RAM 28: Content Addressing Memory

29: power supply unit 30: reset unit

31, 41: line driver and hybrid 32, 42: ADSL transceiver

33, 43: main unit and cell disassembly / reassembly

34: Ethernet transceiver 35, 45: transformer

36, 46: RJ-45 connectors 37, 47: flash ROM and DRAM

44: ATM25 transceiver

In order to achieve the above object, the present invention provides a general-purpose asymmetric digital subscriber line terminal comprising: Ethernet matching means for providing an Ethernet port function; ATM 25 matching means for providing utopia port functionality of a utopia level 1 interface; A control means for providing the utopia port and the Ethernet port for connecting the Ethernet matching means and the AT25 matching means, disassembling / reassembling an AT cell input from the Utopia port, and controlling the terminal device. ; Asymmetric subscriber line matching means for matching an asymmetric digital subscriber line (ADSL) signal output through the Ethernet port and the utopia port; Telephone signal separation means for separating the acoustic signal of the telephone from the signal output from the asymmetric subscriber line matching means; And memory means for storing data for the terminal device and information for supporting the setup and ATM function of the terminal device.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention;

1 is an exemplary configuration diagram of a system to which a universal asymmetric subscriber line terminal apparatus according to the present invention is applied. The system to which the asymmetric subscriber line is applied includes an ATM switch or a digital subscriber line connection multiplexing device (11), a terminal device (12) having an ATM25 matching section (13) and an Ethernet matching section (14), and a telephone signal separation section (15). ), Subscriber premises devices (18, 19).

The apparatus of the present invention is described in more detail with reference to FIG. 1 as follows.

An ATM switch or digital subscriber line access multiplexing device (11) consisting of a high speed ATM cell bus and an ADSL line termination module plugged therein is connected to the terminal device (12) via an ADSL line. The terminal 12 is configured as a standalone type having an ATM forum 25.6 Mbps matching type and Ethernet 10BaseT matching type.

The ATM25 matching unit 13 is connected to a subscriber premises device 18 having a console environment for video services or games. Since the Ethernet matching unit 14 can support a plurality of personal computers (PCs), the Ethernet matching unit 14 is used to provide personal computer communication or Internet service to the subscriber indoor device 19 using the personal computer service.

The telephone signal separation unit 16 functions to separate telephone acoustic signals among signals input through the ADSL connection network, and the separated telephone acoustic signals are transmitted to the telephone to enable a call between telephone subscribers.

2 is a configuration diagram of an embodiment of an asymmetric digital subscriber line terminal device according to the present invention. The ADSL terminal apparatus includes an Ethernet matching unit 20, an ATM25 matching unit 21, a main control unit 22, an ADSL matching unit 23, a telephone signal separation unit 24, a monitor matching unit 25, and a flash ROM 26. ), A dynamic RAM 27, a content addressing memory device 28, a power supply unit 29, and a reset unit 30.

The apparatus of the present invention is described in more detail with reference to FIG. 2 as follows.

The Ethernet matching unit 20 provides an Ethernet port for 10 Mbps communication for personal computer communication or Internet access subscriber.

The ATM25 matching unit 21 provides a utopia level 1 interface function and a physical layer interface function for an ATM network of 25.6 Mbps.

The main controller 22 incorporates a control function of an ADSL terminal device and an ATM cell disassembly / reassembly function. The main control unit 22 provides a utopia port of ATM physical layer matching for the ATM25 matching unit 21 and a serial communication port for the Ethernet matching unit 20. The main control unit 22 connects to the Ethernet matching unit 20 using one of the six serial ports provided as the Ethernet port. The utopia port of the ATM physical layer matching in the main controller 22 matches the ATM25 matching unit 21.

The ADSL matching section 23 is connected to a port for matching the ADSL signal, and transmits high speed data over an existing copper wire. The ADSL matching unit 23, under the control of the main controller 22, matches the signal input through the utopia port and the serial communication port to the ADSL.

Then, the telephone signal separator 24 separates the voice telephone signal connected to the voice telephone subscriber by passing the signal input from the ADSL matching unit 23 to the low pass filter.

The monitor matching unit 25 is used for the input / output function of the monitor program and the debugging of the application program under the control of the main controller 22.

The flash ROM 26 stores data for setting the ADSL terminal device and transmits the data for setting to the main controller 22 at the time of booting or at the request of an interrupt of the main controller 22. In particular, in the realization of this configuration, the flash ROM 26 is configured with a 2 Mbyte capacity by using four flash memories of 512K × 8.

The dynamic RAM 27 operates as a main memory of the terminal device. In particular, in realizing this configuration, the dynamic RAM 27 is configured using 4 Mbyte DRAM.

The content addressable storage device 28 stores and stores ATM functions of the terminal device, and ATM is supported in hardware according to this content. In particular, in the realization of this configuration, the configuration is made of 4K x 64 CAM (Content Addressable Memory).

The power supply unit 29 supplies power to each unit by configuring the power (+ 5V, + 3.3V, + 12V) required for the ADSL terminal device to be used as a household AC 110V / 220V.

The reset unit 30 performs hardware restart of the terminal device. The reset section 30 has a reset circuit for main controller reset, power reset, and manual reset.

3 is a detailed block diagram of an embodiment of the Ethernet matching unit of FIG. 2 according to the present invention. The Ethernet matching unit 20 is a line for optimizing several carriers according to the characteristics of a subscriber line and a local loop when transmitting digital data of uplink speed (up to 960Kbps) and downlink speed (up to 8Mbps) provided by an ADSL multiplexer. The driver and the hybrid unit 31, the ADSL transceiver 32 for separating the up and down channels by using the frequency division scheme and the echo canceller to use the up and down channels in the distinct frequency band, and controls the ADSL terminal, ATM Signals from the main unit and cell disassembly / reassembler (33), the Ethernet transceiver (34) capable of IEEE 802.3 Ethernet interface, and the Ethernet transceiver (34), which provide layer processing and bus interface functions, and six serial communication ports. The transformer 35, the RJ-45 connector 36 connected to the Ethernet subscriber, and the ADSL control information and related data for transmitting the data stably over a long distance. Has a flash ROM and DRAM 37.

Referring to Figure 3 described in more detail the Ethernet matching unit of the present invention.

When the Internet protocol received through the ATM network is received by the ADSL multiplexer, the ADSL transceiver 32 receives the ADSL frame through the line driver and the hybrid 31 of the ADSL terminal. The ADSL transceiver 32 separates the up / down channel by using a frequency division scheme and an echo canceller to use the up / down channel in the received frequency band in a separate frequency band.

When the ADSL transceiver 32 transmits an ADSL frame separated into up / down channels to the main controller and the cell disassembly / reassembler 33, the main controller and cell disassembly / reassembler 33 converts the Ethernet frame into an Ethernet frame. Transfer to 34. The Ethernet transceiver 34 performs a matching function at the Ethernet frame or Internet Protocol (hereinafter referred to as "IP") packet level through the transformer 35 and the RJ-45 connector 36. An ADSL terminal having an Ethernet interface bridges different medium access control (MAC) addresses and connects them to subscribers.

In addition, in order to cope with the congestion of traffic upward, the ADSL terminal has a buffering space in the Ethernet transceiver 34 and discards it at the Ethernet frame or IP packet level when information to be discarded is generated. Since the data discard function described above cannot be performed at the ATM cell level, the protocol stack for subscriber access using Ethernet converts an Ethernet frame into an ATM cell in an ADSL multiplexer to connect with an ATM network. Therefore, the IP transmission is interworked with the Internet network after transforming the packet into an ATM cell using the AAL5 layer.

4 is a detailed configuration diagram of an ATM25 matching unit of FIG. 2 according to the present invention. Down line (up to 8Mbps) data reception and line matching function from ADSL multiplexer, line driver and hybrid (41), A / D and D / A conversion, ADSL signal modulation / demodulation, echo cancellation, ADSL transceiver 42 including filtering, equalizing, error monitoring, and forward error correction (FEC) functions, a main control unit and cell disassembly / reassembly 43, which controls the ADSL terminal and provides ATM layer processing and bus interface functions An ATM25 transceiver 44 capable of interfacing a 25.6 Mbps ATM forum, a transformer 45 for reliably transmitting signals from the ATM25 transceiver 44, and an RJ-45 connector connected to an ATM25 subscriber. And a flash ROM and RAM 47 for storing ADSL control information and related data.

The ATM forum matching unit of the present invention will be described in more detail with reference to FIG. 4 as follows.

In order to receive the high speed data from the ADSL multiplexer at the ADSL terminal and transmit it to the ATM25 subscriber, the ADSL transceiver 42 receives the ADSL frame transmitted by the ADSL multiplexer through the line driver and the hybrid 41. When the ADSL transceiver 42 transmits the ADSL frame to the main control device and the cell disassembly / reassembly 43, the ADSL transceiver 42 is reassembled into the ATM cell from the main control device and the cell disassembly / reassembly 43 and transferred to the ATM25 transceiver 44. . Through the transformer 45 and the RJ-45 connector 46 that are matched with the ATM25 transceiver 44, an ATM25 subscriber using an existing copper wire may provide high-speed data service.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, the present invention provides a general asymmetric digital subscriber line (ADSL) terminal apparatus capable of implementing both an ATM transmission scheme and an Ethernet matching scheme in an ADSL terminal apparatus. can do.

Claims (4)

A general purpose asymmetric digital subscriber line (ADSL) terminal, Ethernet matching means for providing an Ethernet port function; ATM 25 matching means for providing utopia port functionality of a utopia level 1 interface; A control means for providing the utopia port and the Ethernet port for connecting the Ethernet matching means and the AT25 matching means, disassembling / reassembling an AT cell input from the Utopia port, and controlling the terminal device. ; Asymmetric subscriber line matching means for matching an asymmetric digital subscriber line signal output through the Ethernet port and the utopia port; Telephone signal separation means for separating the acoustic signal of the telephone from the signal output from the asymmetric subscriber line matching means; Memory means for storing data for the terminal device and information for supporting the setup and ATM function of the terminal device Universal asymmetric digital subscriber line terminal comprising a. The method of claim 1, The Ethernet matching means, A line driver and hybrid means for optimizing the speed of the uplink / downlink channel according to the characteristics of the subscriber line and the local loop in the asymmetric digital subscriber line multiplexing device; Asymmetric digital subscriber line transmission / reception means for separating the up / down channels; Main controller and cell disassembly / reassembly means for providing AT layer processing and bus interface functions, and six serial communication ports; Ethernet transmission and reception means for Ethernet interface; Transformer means for transmitting the signal from the Ethernet transmission and reception means stably over a long distance; RJ-45 connector means for connecting with an Ethernet subscriber; And Memory means for storing asymmetric digital subscriber line control information and related data A general-purpose asymmetric digital subscriber line terminal device comprising: a. The method of claim 1, The AMT25 matching means, A line driver and hybrid means for performing a data reception function and a line matching function from the downlink channel; Asymmetric digital subscriber line transmission / reception means for interfacing the asymmetric digital subscriber line; Main controller and cell disassembly / reassembly means for providing AT layer processing and bus interface functions; An MT25 transmission / reception means for interfacing an AT-Forum; Transformer means for stably transmitting a signal from the AT25 transmission and reception means to a long distance; RJ-45 connector means for connecting to an ATM25 subscriber; And Memory means for storing asymmetric digital subscriber line control information and associated data; A general-purpose asymmetric digital subscriber line terminal device comprising: The method of claim 1, Power supply means for supplying power to the terminal device; Reset means for resetting the terminal device; And Monitor matching means for matching the input and output of the monitor A general-purpose asymmetric digital subscriber line terminal further comprising.