KR20010055542A - Apparatus for separative application in ADSL modem - Google Patents

Abstract

PURPOSE: A separable application apparatus of an ADSL modem is provided to replace only ADSL function block by a compatible product while using a common block as it is, thereby improving utilization and economical efficiency of a product. CONSTITUTION: An ADSL(Asymmetric Digital Subscribe Line) function part(10) converts data received through a telephone line into ATM(Asynchronous Transfer Mode) form data for processing an ADSL frame. A processor interface part(20) is constructed within one chip set with the ADSL function part(10) for controlling Ethernet interface with an ATM-25. An ATM-25 function part(30) is constructed in another chip set for performing ATM-25 interface. An ATM-25 control part(40) is constructed within one chip set with the ATM-25 function part(30) for controlling ATM-25 interface.

Description

Applicator for separative application in ADSL modem

The present invention relates to a detachable application device of an asymmetric digital subscriber line (ADSL) modem, and in particular, can transmit data of about 8 Mbps downward and about 1 Mbps upward using an existing telephone line. The present invention relates to a separate application device for an ADSL modem, in which a part of an ADSL subscriber modem function block that performs an ADSL function is combined with an application module having a desired interface so as to be suitable for use.

In general, subscriber modems receive ADSL data on telephone lines, process ADSL frames in ADSL data processing units, and finally in the form of an Asynchronous Transfer Mode (ATM) cell with a Universal Test and Operations Physical Interface for ATM (UTOPIA) interface. This is passed to the ATM cell processing unit. After that, ATM cell data is processed in the form of Ethernet or ATM-25 depending on the type of application used.

Here, the current ADSL modems are not compatible with each other unless they use the same chipset. Therefore, when a product is replaced due to compatibility problems, all modems need to be replaced. Therefore, the ATM cell processing unit after the UTOPIA interface, which is guaranteed to be compatible among the functions of the ADSL modem, can be used in common. Therefore, the ATM cell processing unit and the application functions such as Ethernet and ATM-25 are not compatible with the ADSL function unit. If the module needs to be replaced due to compatibility problem, the common part should be used as it is and only the ADSL function part can be used as a compatible product.

1 is a block diagram of an ATM application device of a conventional ADSL modem.

As shown therein, reference numeral 1 is an ADSL function unit in an ATM application, and 2 is an ATM-25 function unit connected to the ADSL function unit 1 to perform an ATM-25. And ATM-25 function (2) consists of one chipset.

2 is a block diagram of an Ethernet application device of the conventional ADSL modem.

As shown therein, reference numeral 3 is an ADSL function unit in an ATM application, and 4 is an Ethernet function unit connected to the ADSL function unit 3 to perform an Ethernet processing function. The Ethernet function unit 4 is composed of one chipset.

As such, the conventional ADSL modem is composed of an ADSL function unit 1, 3, an ATM-25 function unit 2, or an Ethernet function unit 4 as one system.

However, since the conventional technology includes the ADSL functional unit (1) (3) and the ATM-25 functional unit (2) or the Ethernet functional unit (4) as a single system, when the compatibility problem occurs, the entire modem is replaced. There was a downside to it.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to combine an application module having a desired interface by making a separate module for performing an ADSL function among the functional blocks of the ADSL modem. To provide a separate application device of the ADSL modem can be used.

In order to achieve the above object, the ADSL modem detachable application device according to the present invention,

An ADSL function unit which converts data received through a telephone line into ATM data and performs an ADSL frame processing function; A processor interface unit configured in the same chipset with the ADSL function unit to control an ATM-25 and an Ethernet interface; An ATM-25 function unit configured as a chipset separate from the ADSL function unit to perform an ATM-25 interface; The technical features of the ATM-25 function unit and the ATM-25 control unit is configured in the same chipset to control the ATM-25 interface.

1 is a block diagram of an ATM application apparatus of a conventional ADSL modem.

2 is a block diagram of an Ethernet application device of a conventional ADSL modem.

Figure 3 is a block diagram of a separate ATM application device of the ADSL modem according to an embodiment of the present invention,

Figure 4 is a block diagram of a separate Ethernet application device of the ADSL modem according to another embodiment of the present invention,

5 is a detailed block diagram of an ADSL function unit and a processor interface unit in FIGS. 3 and 4;

6 is a detailed block diagram of an ATM-25 function unit and an ATM-25 controller in FIG. 3;

FIG. 7 is a detailed block diagram of an Ethernet function unit and an Ethernet controller in FIG. 4.

<Explanation of symbols for main parts of the drawings>

10: ADSL function unit 20: processor interface unit

30: ATM-25 function part 40; ATM-25 control unit

50: Ethernet function unit 60: Ethernet control unit

Hereinafter, an embodiment according to the technical concept of the detachable application device of the present invention ADSL modem is as follows.

3 is a block diagram of a separate ATM application device of an ADSL modem according to an embodiment of the present invention.

As shown here, the ADSL function unit 10 converts the data received through the telephone line into ATM data and performs the ADSL frame processing function; A processor interface unit 20 configured together with the ADSL function unit 10 to control an ATM-25 and an Ethernet interface; An ATM-25 function unit 30 configured as a chipset separate from the ADSL function unit 10 to perform an ATM-25 interface; The ATM-25 function unit 30 and the ATM-25 control unit 40 are configured in the same chipset and control the ATM-25 interface.

Figure 4 is a block diagram of a separate Ethernet application device of the ADSL modem according to another embodiment of the present invention.

As shown here, the ADSL function unit 10 converts the data received through the telephone line into ATM data and performs the ADSL frame processing function; A processor interface unit 20 configured together with the ADSL function unit 10 to control an ATM-25 and an Ethernet interface; An Ethernet function unit 50 configured as a chipset separate from the ADSL function unit 10 to perform an Ethernet interface function; The Ethernet function unit 50 is configured in the same chipset and the Ethernet control unit 60 to control the Ethernet interface.

FIG. 5 is a detailed block diagram of an ADSL function unit and a processor interface unit in FIGS. 3 and 4.

As shown therein, the ADSL function unit 10 includes: a line connection unit (RJ11) 11 for performing signal input / output with the ADSL network at an up and down speed of 8 Mbps and 1 Mbps; A filter / line driver 12 connected to the line connector 11 to perform filtering and line driving; A DMT signal processor 13 connected to the filter / line driver 12 to process a discrete multitone modulation (DMT) signal; A framer / digital interface unit 14 connected to the DMT signal processor 13 to perform a framing function and a digital interface; The ATM cell description unit 15 connected to the framer / digital interface unit 14 performs delineation and is connected to the ADSL interface.

The processor interface unit 20 further includes a memory unit 21 for storing data; A u-processor interface unit 22 connected to the memory unit 21 and connected to the ADSL function unit 10 to control an ATM-25 and an Ethernet interface; A data latch unit 23 for latching data of the u-processor interface unit 22 and connected to the processor interface; The address latch unit 24 latches an address of the u-processor interface unit 22 and is connected to the processor interface.

FIG. 6 is a detailed block diagram of an ATM-25 function unit and an ATM-25 controller in FIG.

As shown in the drawing, the ATM-25 function unit 30 includes: a first in first out (FIFO) 31 for temporarily storing data input through an ADSL interface; A scrambler (32) connected to the FIFO (31) and performing scrambling and descrambling of data; A coding unit (33), connected to the scrambler (32), for encoding and decoding data; A bus controller 34 connected to the FIFO 31, the scrambler 32, and the coding unit 33 to control a data and address bus; It is composed of a line driver 35 connected to the coding unit 33, driving a line and connected to the ATM interface.

The ATM-25 control unit 40 includes: a data latch unit 41 connected to a processor interface and latching data; An address latch unit 42 connected to the processor interface and latching an address; A module recognition signal sensing unit 43 connected to the processor interface and sensing a signal for module recognition; A u-processor 44 connected to the data latch unit 41, the address latch unit 42, and the module recognition signal detecting unit 43, and controls the ATM-25 function processing of the ATM-25 function unit 30. )Wow; The memory unit 45 is connected to the u-processor 44, stores data, and is connected to the processor interface.

FIG. 7 is a detailed block diagram of an Ethernet function unit and an Ethernet controller in FIG. 4.

As shown here, the Ethernet function unit 50 includes: an Ethernet framer unit 51 for performing Ethernet framing of data input through an ADSL interface; An Ethernet / ATM conversion unit 52 connected to the Ethernet framer unit 51 and converting an Ethernet signal into an ATM signal; A SAR 53 connected to the Ethernet / ATM conversion unit 52 for performing segmentation and reassembly (SAR); A bus controller 54 connected to the Ethernet framer unit 51, the Ethernet / ATM converter 52, and the SAR 53 to control a data and address bus; It is composed of a line driver 55 connected to the SAR 53, driving the line and connected to the ATM interface.

The Ethernet control unit 60 includes: a data latch unit 61 connected to a processor interface and latching data; An address latch unit 62 connected to the processor interface and latching an address; A module recognition signal sensing unit 63 connected to the processor interface and sensing a signal for module recognition; A u-processor (64) connected to the data latch unit (61), the address latch unit (62), and the module recognition signal detecting unit (63), and controlling the Ethernet function processing of the Ethernet function unit (50); The memory unit 65 is connected to the u-processor 64, stores data, and is connected to the processor interface.

The operation of the detachable application device of the ADSL modem according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the subscriber modem receives ADSL data from the telephone line, processes the ADSL frame in the ADSL data processing unit, and finally passes it to the ATM cell processing unit in the form of an ATM cell having a UTOPIA interface. The ATM cell data is then processed in the form of Ethernet or ATM-25, depending on the type of application used. Here, the current ADSL modems are not compatible with each other unless they use the same chipset. Therefore, when a product is replaced due to compatibility problems, all modems need to be replaced. Therefore, the ATM cell processing unit after the UTOPIA interface, which guarantees compatibility among the functions of the ADSL modem, can be commonly used. Therefore, the ATM cell processing unit and the application functions such as Ethernet and ATM-25 are incompatible with each other. The present invention is to use the common part as it is and to use only the ADSL function part as a compatible product when it is necessary to develop a module and replace the modem due to compatibility problems.

Thus, a separate (or modular) ADSL modem consists of two blocks. That is, the ADSL function processing unit for processing the ADSL function, and the application processing unit for processing the ATM function and Ethernet or ATM-25.

The ADSL function processing unit including the ADSL function unit 10 and the processor interface unit 20 performs ADSL frame processing and ATM TC functions for converting data received through a telephone line into ATM data. So the ADSL channel's multiplexing / demultiplexing function, framing and deframing function, DMT modulation / demodulation function, A / D, D / A conversion and filtering function, UTOPIA interface function, cell description function and cell pay Perform load scramble / descramble function.

ATM function processing and application function processing are based on UTOPIA interface functions.

The ATM-25 interface features 4B / 5B coding / decoding, HEC (Header Error Control) check and generation, NRZ (Non Return to Zero) and NRZI (Non Return to Zero Inverted). Inverse non-zero return) coding / decoding function.

In addition, the Ethernet interface performs a medium access control (MAC) function, a channel interface function, an Ethernet framing function, a preamble generation / stripping function, and a source address generation function.

The ATM-25 control or Ethernet control function consists of 32 or 16 bit CPUs, memory and address decoder logic, ADSL interface logic and serial interface logic.

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

In the modular ADSL subscriber modem, the ADSL function unit 10 multiplexes / demultiplexes an ADSL channel, performs framing / deframing, and performs DMT modulation / demodulation to undergo A / D, D / A conversion and filtering. In this case, the final ATM cell has a UTOPIA interface.

In addition, the STM-25 function unit 30 receives an ATM cell of the UTOPIA interface output from the ATM multiplexer through the UTOPIA interface, performs 4B / 5B coding / decoding, performs HEC checking and generation processing, and performs NRZ / NRZI coding / decoding is performed and transmitted. At the time of transmission, the reverse process is executed.

Meanwhile, the Ethernet function unit 50 performs a MAC function, a channel interface function, an Ethernet framing, a preamble generation and a stripping function, and the like.

Meanwhile, the STM-25 or the Ethernet control unit 40 and 60 support and control functions necessary for the ADSL function unit 10, the ATM-25 function unit 30, and the Ethernet function unit 50 to perform their own functions. Run

Thus, the present invention constitutes a block having a common function of the ADSL function, the data has a UTOPIA interface, and the control signal has a 32-bit process interface. The common part has an ATM-25 interface and an Ethernet interface to support application functions.

In addition, if the modem needs to be replaced due to compatibility issues, replace only incompatible ADSL function blocks, depending on the product.

In addition, when the ADSL function unit 10 performing a common function needs to change an application to be used, the ADSL function unit 10 may be replaced with only the application block while leaving the ADSL function unit 10 intact. For example, when replacing a modem having an ATM-25 interface with an Ethernet modem, the ATM-25 function unit 30 is replaced with an Ethernet function unit 50, and the modem having an Ethernet interface is replaced with an ATM-25 modem. In the case of replacement, the Ethernet function unit 50 may be replaced with the ATM-25 function unit 30.

As described above, the present invention is to use a combination of an application module having a desired interface by making a separate module a part performing the ADSL function among the functional blocks of the ADSL modem.

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, the separate application device of the ADSL modem according to the present invention is to use the ATM cell processing after the UTOPIA interface that ensures compatibility among the functions of the ADSL modem in common, ATM cell processing and Ethernet, ATM-25, etc. By developing the ADSL function block that is not compatible with the application function block of as a separate module, if the modem needs to be replaced due to compatibility problems, the common block is used as it is and only the ADSL function block can be replaced with the compatible product. There is an effect to improve the utilization and economic efficiency of the product.

Claims (8)

An ADSL function unit which converts data received through a telephone line into ATM data and performs an ADSL frame processing function; A processor interface unit configured in the same chipset with the ADSL function unit to control an ATM-25 and an Ethernet interface; An ATM-25 function unit configured as a chipset separate from the ADSL function unit to perform an ATM-25 interface; And an ATM-25 control unit configured to control the ATM-25 interface, which is configured together with the ATM-25 function unit in one chipset. The method of claim 1, wherein the ADSL function unit, A line connection unit configured to perform signal input / output with the ADSL network at up and down speeds of 8 Mbps and 1 Mbps; A filter / line driver connected to the line connection unit to perform filtering and line driving; A DMT signal processor connected to the filter / line driver to process a DMT signal; A framer / digital interface unit connected to the DMT signal processor to perform a framing function and a digital interface; And an ATM cell description unit connected to the framer / digital interface unit to perform a description and an ATM cell description unit connected to an ADSL interface. The method of claim 1, wherein the processor interface unit, A memory unit for storing data; A u-processor interface unit connected to the memory unit and connected to the ADSL function unit to control an ATM-25 and an Ethernet interface; A data latch unit for latching data of the u-processor interface unit and connected to the processor interface; And an address latch unit connected to a processor interface and latching an address of the u-processor interface unit. The method of claim 1, wherein the ATM-25 function unit, A FIFO for temporarily storing data input through the ADSL interface; A scrambler connected to the FIFO and configured to perform scrambling and descrambling of data; A coding unit connected to the scrambler and configured to encode and decode data; A bus controller connected to the FIFO, the scrambler, and the coder to control a data and address bus; A separate application device of an ADSL modem, comprising: a line driver connected to the coding unit, driving a line, and connected to an ATM interface. The method of claim 1, wherein the ATM-25 control unit, A data latch unit connected to the processor interface and latching data; An address latch unit connected to the processor interface and latching an address; A module recognition signal detection unit connected to the processor interface and detecting a signal for module recognition; A u-processor connected to the data latch unit, the address latch unit, and the module recognition signal detecting unit, and controlling the ATM-25 function processing of the ATM-25 function unit; And a memory unit connected to the u-processor, storing data, and connected to a processor interface. An ADSL function unit which converts data received through a telephone line into ATM data and performs an ADSL frame processing function; A processor interface unit configured in the same chipset with the ADSL function unit to control an ATM-25 and an Ethernet interface; An Ethernet function unit configured as a chipset separate from the ADSL function unit to perform an Ethernet interface function; The separate application device of the ADSL modem, characterized in that configured as the Ethernet function unit and the Ethernet control unit configured to control the Ethernet interface. The method of claim 6, wherein the Ethernet function unit, An Ethernet framer unit for performing Ethernet framing of data input through the ADSL interface; An Ethernet / ATM converter connected to the Ethernet framer and converting an Ethernet signal into an ATM signal; A SAR connected to the Ethernet / ATM conversion unit and performing a SAR; A bus controller connected to the Ethernet framer, the Ethernet / ATM converter, and the SAR to control a data and address bus; And a line driver connected to the SAR and configured to drive a line and connected to an ATM interface. The method of claim 6, wherein the Ethernet control unit, A data latch unit connected to the processor interface and latching data; An address latch unit connected to the processor interface and latching an address; A module recognition signal detection unit connected to the processor interface and detecting a signal for module recognition; A u-processor connected to the data latch unit, the address latch unit, and the module recognition signal detecting unit, and controlling the Ethernet function processing of the Ethernet function unit; And a memory unit connected to the u-processor, storing data, and connected to a processor interface.