KR20010035831A - Low power desinging apparatus of asymmetric digital subscriber line transmission unit at the customer premises end in asymmetric digital subscriber line system and there of data communicating method - Google Patents

Abstract

PURPOSE: A low-power designing device of a subscriber terminal device in an ADSL(Asymmetric Digital Subscriber Line) system is provided to control powers of each terminal device of a PC(Personal Computer) NIC ATU-R(Network Interface Card ADSL Transceiver Unit-Remote) form. CONSTITUTION: An ADSL(Asymmetric Digital Subscriber Line) modem(10-2) transceives data between an ATU-R(ADSL Transceiver Unit-Remote) and an ATU-C(ADSL transceiver Unit). An SAR/PCI(Segment And Reassembly/Peripheral Component Interconnect)(10-1) divides the data into ATM(Asynchronous Transfer Mode) cells, and collects received cells to convert the received cells into one user data. An ATM TC(Transmission Converter)(10-3) matches a data interface of the SAR/PCI(10-1) and the ADSL modem(10-2). An analog line driver(10-5) amplifies an analog signal outputted from the ADSL modem(10-2) as a signal for being transmitted through a general telephone line. A controller(10-6) generates various control signals of the ATU-R to match an interface, and outputs power control signals controlling powers of each device by an ATU-C connection of a user. A power(10-7) turns on/off the ADSL modem(10-2), the ATM TC(10-3), the analog line driver(10-5) by the power control signals.

Description

Low power desinging apparatus of asymmetric digital subscriber line transmission unit at the customer premises end in asymmetric digital subscriber line system and there of data communicating method}

The present invention relates to a data communication apparatus and method, and more particularly, to a low power design device and a data communication method of a subscriber station terminal device in an ADSL system.

Asymmetric Digital Subscriber Line (ADSL) uses approximately 1.5 Mbps to 8 Mbps downlink (from subscriber to subscriber) transmission and low-speed uplink (subscriber to subscriber) using conventional telephone twisted pair cable. Was developed by Bellcore in the US as a new transmission technology that enables transmission. This ADSL consists of a 1.5 Mbps downlink channel at a much higher frequency than the 4 KHz voice band, a 16 Kbps upstream channel between the band and the voice band, and frequency division that allows analog voice to pass through the lowest band. I choose the way.

This ADSL has a transmission distance long enough to allow a relay connection from the telephone or remote station to the subscriber by using a conventional telephone spiral pair cable, and the installation and supply of a service device is as simple as conventional telephone service (POTS). . In addition, by placing the video and control signal band on the upper frequency band of the existing telephone signal it is possible to transmit several signals simultaneously using the telephone line without overlapping the frequency band.

When using ADSL, a video server that stores compressed video signals such as movies, videos, and games is connected to the ASL Transceiver Unit (ATU-C), which is the home station, along with the existing telephone switch. ATU-R (ADSL Transceiver Unit-Remote), which is a subscriber-side transmission device, is connected to the subscriber station. ATU-R, along with existing telephones, connects directly to a PC, ATM or LAN consol, or to a video and audio signal decoder called a set-top box, which is connected to a TV or PC. Plain Ordinary Telephone Service (POTS) signals are distributed towards standard telephone wiring in the subscriber's home.

In general, ATU-R only needs to be serviced when the user desires. After a conventional NIC Network Interface Card Adsl Transceiver Unit-Remote (ATU-R) PC is powered on, it continues to be an analog line driver (not shown), ADSL modem (not shown), ATM regardless of the user's use of the NIC-ATUR. Supply power to TC (not shown). In other words, when the PC is powered on, the hardware of the NIC ATU-R continues to waste unnecessary power, even if the user does not use the NIC ATU-R's features.

Therefore, in this case, there is a problem in that unnecessary power is generated and the lifespan of the NIC-ATUR 10 is also shortened and electromagnetic waves are generated.

The technical problem to be achieved by the present invention is to control the power of each part of the terminal of the PC network interface card type of the ADSL terminal having ATM cell data in the physical access network ADSL to prevent unnecessary power waste and extend the life of the terminal The present invention provides a low power design device of a subscriber station terminal device in a system.

Another technical problem to be solved by the present invention is to provide an efficient data communication method using a low power design device of a subscriber station terminal device in an ADSL system.

1 is a block diagram showing the configuration of a low power design device of a subscriber station terminal device in an ADSL system according to the present invention.

FIG. 2 is a detailed view of the DC / DC power supply unit of the apparatus shown in FIG. 1.

3 is a diagram illustrating a selection screen for data communication connection according to the apparatus of FIG. 1.

4 is a flowchart illustrating an operation of a data communication method according to a low power design device of a subscriber station terminal device in an ADSL system according to the present invention.

The low-power design device of the subscriber station terminal device in the ADSL system for solving the technical problem to be achieved by the present invention is to transmit / receive data between the ATU-R (subscriber transmitter) and ATU-C (mother station transmitter) ADSL modem; A separate assembly / peripheral access bus (SAR / PCI) for dividing the data into ATM cells and collecting the received cells into one user data; ATM transmission conversion unit (ATM TC) for data interface matching between the SAR / PCI and the ADSL modem; An analog line driver for amplifying the analog signal output from the ADSL modem into a signal to be transmitted through a general telephone line; A control unit for generating various control signals and interfaces of ATU-R and outputting a power control signal for controlling the power of each unit by the user's ATU-C connection; And a power supply unit for turning on / off the power of the ADSL modem, the ATM TC, and the analog line driver in the power control signal of the controller.

According to another aspect of the present invention, there is provided a data communication method according to a low power design apparatus of a subscriber station terminal device in an ADSL system, which is output from an ADSL modem, an ATM TC for interface matching of the ADSL modem, and an ADSL modem. A data communication method between an ATU-R and an ATU-C comprising an analog line driver for amplifying an analog signal into a signal to be transmitted through a general telephone line, the method comprising: (a) a user of the ATU-R; Turning on the ADSL modem, ATM TC, and analog line driver when connected; (b) obtaining a noise margin by establishing synchronization of the ATU-R and the ATU-C and measuring frequency characteristics of both ends of the line; (c) measuring data transmission rate according to the noise margin and exchanging data between the ATU-R and the ATU-C to transmit / receive data according to the transmission rate; And (d) turning off the ADSL modem, the ATM TC, and the analog line driver when the user of the ATU-R releases the connection with the ATU-C.

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

1 is a block diagram showing the configuration of a low power design device of a subscriber station terminal device in an ADSL system according to the present invention.

The apparatus shown in FIG. 1 includes a NIC ATU-R 10, a host memory 11 storing an ATM cell, a host processor 12 performing ADSL communication with the NIC ATU-R 10 and the host memory 11. It consists of.

In the present invention, the NIC ATU-R 10 divides user data to be transmitted into an ATM (Asynchronous Transfer Mode) cell and collects the received cells into one user data. The segment and reassembly / peripheral access bus (Segment And Reassembly / Peripheral) Component Interconnect, hereinafter abbreviated as SAR / PCI) 10-1, ADSL modem 10-2, ATM transfer converter for data interface matching between SAR / PCI 10-1 and ADSL modem 10-2 (Transmission Convergence, hereinafter abbreviated as TC) (10-3), SRAM (10-4) that manages the start address of the host memory (11), and analog signals output from the ADSL modem (10-2). Analog line driver (10-5) to amplify the signal to be transmitted through the transmission, generating various control signals of the NIC ATU-R (10) and local host interface provided by the SAR / PCI (10-1) Interface and the host interface required by each part, Control logic 10-6, on / off control commands of control logic 10-6, ADSL modem 10-2, ATM TC 10-3, analog line driver 10-5 It is composed of a DC power supply unit 10-7 for inputting power to the power supply).

In the present invention, the DC power supply unit 10-7 is controlled by the on / off control command of the DC / DC converter 10-71 and the control logic 10-6 outputting ± 15V or + 3.3V by the control signal. And a DC / DC power supply control unit 10-72 for controlling the output of the DC / DC converter 10-71.

FIG. 2 is a detailed view of the DC / DC power supply unit of the apparatus shown in FIG. 1.

Next, the present invention will be described in detail with reference to FIGS. 1 and 2.

The SAR / PCI 10-1 divides user data to be transmitted into ATM cells and collects the received cells into one user data.

However, since the data interfaces of the SAR / PCI 10-1 and the ADSL modem 10-2 are different (that is, the data input / output form of the ADSL modem 10-2 is serial data / clock type, The data input / output format required by the PCI 10-1 is a parallel form called UTOPIA. The ATM TC 10-3 matches this. The ATM TC 10-3 converts the received data in serial form into ATM cell data in parallel form (16 bits or 8 bits: UTOPIA Rx Bus) when receiving data, and in parallel form (UTOPIA Tx) when transmitting data. Bus ATM data is serialized. In general, ATM-related cards use the PCI interface because of the high data transfer rate, which is usually one-chip with SAR function.

The host memory 11 is a data buffer for storing ATM cells, and the SRAM 10-4 manages a start address of the host memory 11. The SRAM 10-4 also stores an ATM connection table, which is used by the SAR / PCI 10-1.

The analog line driver 10-5 amplifies the analog signal output from the ADSL modem 10-2 into a signal to be transmitted through a general telephone line and reduces it when receiving. A power supply of ± 15V is required, which is made and provided by a ± 15V DC / DC converter (10-711). In addition, the ADSL modem 10-2 and the ATM TC 10-3 also require a + 3.3V power supply for low power. Therefore, for this purpose, a DC / DC converter 10-712 for + 3.3V is required.

The ± 15V DC / DC converter 10-711 and the + 3.3V DC / DC converter 10-712 produce a DC output from the DC input power supply. If the input power of the ± 15V DC / DC converter (10-711) and the + 3.3V DC / DC converter (10-712) is Vcc_OUT of 5V, ± 15V and + 3.3V are outputted. R (10) will operate normally. However, if the input power of the ± 15V DC / DC converter (10-711) or DC / DC converter (10-712) for + 3.3V is grounded or open, ± 15V and + 3.3V are not output and the ADSL modem ( 10-2), the ATM TC 10-3, and the analog line driver 10-5 are turned off.

The DC / DC power supply control unit 10-72 turns on / off the Vcc_OUT power supply used as an input power supply for the ± 15V DC / DC converter 10-711 and the + 3.3V DC / DC converter 10-712. This is a necessary component for. Table 1 below shows the output of the DC / DC converter 10-71 according to the on / off control signal output from the control logic 10-6.

On / off command Output of the DC / DC converter 10-71 High Vcc_OUT = Vcc_IN That is, ± 15 V, +3.3 V ON Low Vcc_OUT = GND ± 15V, + 3.3V OFF

As shown in Table 1, when the on / off command signal of the control logic (10-6) is high, the power FET is turned on and Vcc_OUT = Vcc_IN (5V). When the on / off command signal is low, Vcc_OUT = GND is The input power of the DC / DC converter 10-71 is turned off.

3 is a diagram illustrating a selection screen for data communication connection according to the apparatus of FIG. 1.

4 is a flowchart illustrating an operation of a data communication method according to a low power design device of a subscriber station terminal device in an ADSL system according to the present invention.

The flowchart shown in FIG. 4 includes the step 40 of turning on the access button, the step 41 of turning on the ATU-R, the step 42 of initializing the ADSL modem and ATM TC, and the ATU-C of the ATU-R. Requesting connection (43), determining whether ATU-C has granted access to ATU-R (44), synchronizing ATU-R with ATU-C (45), analyzing the channel Step 46, exchanging data rates 47; transmitting / receiving data 48; determining whether ATU-R has disconnected the ATU-C; 49, ATU-R It is composed of a step 50 of turning off the power.

Next, the present invention will be described in detail with reference to FIGS. 3 and 4.

The on / off control signal of the control logic 10-3 is made high when the user wishes to connect to ATU-C (not shown) and goes low when disconnecting from the ATU-C. In the case of the NIC ATU-R 10, a simple application program is provided to start an ADSL link when a user desires an example thereof as shown in FIG. When the user presses the access button of FIG. 3, the on / off signal is high and when the user presses the release button, the power is controlled to be low.

When the user presses the connection of an application program to connect with ATU-C (step 40), the Windows device driver (not shown) of the NIC ATU-R 10-1 detects this and the ADSL modem 10-2, ATM The TC 10-3 and the analog line driver 10-5 are turned on (step 41).

When the power is turned on, the internal registers of the ADSL modem 10-2 and the ATM TC 10-3 are initialized (step 42), and the ADSL link protocol is performed.

After the initialization, the NIC ATU-R 10-1 periodically transmits an Activation Request signal to the ATU-C to request access, and the ATU-C transmits an access grant response signal (43, 44). step).

Next, as a transceiver training process, synchronization between the NIC ATU-R 10-1 and the ATU-C is established (step 45).

When the synchronization is established between the two ends (step 46), a noise margin is obtained by measuring the frequency characteristics of the NIC ATU-R (10-1) and the ATU-C both end lines through a channel analysis process.

After the channel analysis, the speed of Down Stream / Upstream transmitted from both ends (4 options delivered) are interchanged (step 47), and four transmissions are performed based on the noise margin determined in step 46. One of the fastest and most marginally downstream, one upstream, is chosen and is the basis for the mutual transmission rate.

After the data rates are interchanged and in a steady state, the ADSL modem 10-2 functions as a kind of data pump to transmit / receive actual user data.

When the user wants to send / receive the data, the connection with ATU-C is released (step 49), and the power of the ADSL modem 10-2, ATM TC 10-3, and analog line driver 10-5 Off.

The present invention is not limited to the above-described embodiments and can be modified by those skilled in the art within the spirit of the invention.

As described above, according to the present invention, only when the user wants to connect with the ATU-C, turn on the power required, and when disconnecting the ATU-C, turn off the corresponding power to reduce the total power consumption of the NIC ATU-R unnecessary It is effective in preventing waste of power and extending the life of the terminal.

Claims (5)

An ADSL modem for transmitting / receiving data between the ATU-R (subscriber transmitter) and the ATU-C (mother station transmitter); A separate assembly / peripheral access bus (SAR / PCI) for dividing the data into ATM cells and collecting the received cells into one user data; ATM transmission conversion unit (ATM TC) for data interface matching between the SAR / PCI and the ADSL modem; An analog line driver for amplifying the analog signal output from the ADSL modem into a signal to be transmitted through a general telephone line; A control unit for generating various control signals and interfaces of ATU-R and outputting a power control signal for controlling the power of each unit by the user's ATU-C connection; And And a power supply unit for turning on / off the power of the ADSL modem, the ATM TC, and the analog line driver in a power control signal of the controller. The method of claim 1, wherein the power supply unit A DC converter converting and outputting a predetermined DC power by a power control signal; And And a power control unit for controlling the output of the DC converter by an on / off control command of the control unit. The method of claim 2, wherein the power control unit And a power FET for outputting predetermined power to the DC converter by inputting an on / off control signal of the controller and a predetermined power. The method of claim 2, wherein the DC converter A subscriber station terminal device in an ADSL system characterized in that the power of the ADSL modem, the ATM TC, and the analog line driver is turned on or off by the output of the power FET depending on whether or not the user is connected to the ATU-C. Low power design device. Data communication between ATU-R and ATU-C including an ADSL modem, an ATM TC for interface matching of the ADSL modem, and an analog line driver for amplifying the analog signal output from the ADSL modem into a signal to be transmitted through a general telephone line. In the method, (a) turning on the ADSL modem, the ATM TC, and the analog line driver when the user of the ATU-R connects to the ATU-C; (b) obtaining a noise margin by establishing synchronization of the ATU-R and the ATU-C and measuring frequency characteristics of both ends of the line; (c) measuring data transmission rate according to the noise margin and exchanging data between the ATU-R and the ATU-C to transmit / receive data according to the transmission rate; And (d) when the user of the ATU-R releases the connection with the ATU-C, a low power design device of a subscriber station terminal device in an ADSL system, comprising turning off the power of the ADSL modem, the ATM TC, and the analog line driver Data communication method according to.