KR20010104548A - Data transmission apparatus capable of using a multi channel - Google Patents

Abstract

The present invention relates to a data transmission apparatus that can be used in a plurality of channels, comprising: an analog signal processor for performing noise reduction of a signal input / output through a transmission channel and proper signal processing according to a channel transmission standard; A digital / analog converter for converting input / output signals through the analog signal processor (D / A) or AD (A / D); A digital signal processor for performing channel coding such as modulation and synchronization of an input / output signal through the digital / analog converter, and error correction; A MAC control unit for preventing a collision with other data by adding or removing a MAC header or the like to the transmission / reception data; A channel selector for selecting a data transmission channel under control of a user or a controller; By configuring the control unit to control each component to enable a smooth data transmission, there is an effect to enable a flexible response without additional costs due to changes in the situation in the home network market, where the main infrastructure has not yet been determined.

Description

DATA TRANSMISSION APPARATUS CAPABLE OF USING A MULTI CHANNEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission apparatus, and more particularly, to a data transmission apparatus that can be used in a plurality of channels to selectively perform data transmission by using a power line or a telephone line as needed.

Recently, the home network has been attracting a lot of attention due to the rapid advancement of the Internet in the home, accompanied by the rapid advancement of social systems such as communication and broadcasting. In the future, research is being conducted to network all devices by adding a communication function to an original function of an electric device.

However, the main problem in the construction of such a home network is firstly, to connect to another network outside the home to receive necessary information at high speed, and secondly, to transmit data at high speed between the networked electronic devices inside the home. To make it possible.

At this time, the first problem is not a big problem due to the spread of the Internet leased line, which is recently increasing, but the second problem is a variety of ways to solve this problem because there are many difficulties in wiring installation and interface between devices.

Currently, there is no need for additional wiring as a method for home networks, and a method of using a telephone line with a large cost savings and a power line are mainly studied. The telephone line transmission method is a home telephone network alliance (HomePNA) or a power line transmission. (PLC: Power Line Carrier) is being attempted around the HomePlug Powerline Alliance.

Next, the characteristics of the telephone line transmission method will be described with reference to the configuration of the telephone line network of FIG.

First, there are version 1 (transmission rate 1 Mbps) and version 2 (transmission rate 10 Mbps) for telephone line transmission, and telephone line networks can operate complementarily to other home network media such as power lines and radio frequency networks.

In addition, since home networking must be available through the same telephone line as a general telephone service, a frequency division scheme is used to allocate and transmit different frequency spectrums to other services, thereby simultaneously operating multiple services through a single pair. This becomes possible.

Next, the characteristics of the power line transmission scheme will be described with reference to the configuration of the power line network of FIG.

Like the telephone line transmission method, the power line transmission method has the advantage that a commercial 60Hz power line is already installed in a building or each home, and can be easily accessed through an outlet. Although the main purpose was the technology of on-off control due to the low transmission rate for communication and the low transmission rate for communication, the recent researches for using the power line as a home network have been actively conducted to develop the transmission speed of 1Mbps to several tens of Mbps. · It is suggested that a few transmission bands over a few MHz can be used as a comparative transmission path.

However, in the prior art as described above, when attempting to connect a transmission device dedicated to a telephone line to form a telephone line network, if the telephone line jack necessary for connecting the apparatus is not provided, the operation for extending the telephone wiring is required. In addition, since the power line is intended for power transportation, if a power line network is to be configured using a power line dedicated transmission device, the power line channel situation is not so good that it can communicate with the power line. If not, there was a problem that the power line transmission device is also unavailable.

Therefore, the present invention was created to solve the above-mentioned problems, and the 5.5 to 9.5 MHz frequency band used in the version 1 of the telephone line transmission system and the 2 to 20 MHz frequency band used in the version 2 are fast. Since it overlaps with the 2-20MHz frequency band considered in the power line transmission method, it is possible to change the telephone network or power line to the transmission medium by using a single transmission device, and to change the market of the home network by the user's choice. It is an object of the present invention to provide a data transmission apparatus that can be used in multiple channels that can flexibly cope with the problem.

1 is a block diagram showing an embodiment of a telephone line network;

2 is a block diagram showing an embodiment of a power line network.

3 is a block diagram showing an example of the configuration of a data transmission apparatus for both a power line and a telephone line according to the present invention;

*** Description of the symbols for the main parts of the drawings ***

10: analog signal processor 20: digital / analog converter

30: digital signal processing unit 40: MAC control unit

50: channel selection unit 60: control unit

The present invention for achieving the above object, the analog signal processor for performing the appropriate signal processing in accordance with the noise reduction and channel transmission standard of the input / output signal through the transmission channel; A digital / analog converter for converting input / output signals through the analog signal processor (D / A) or ADC (A / D); A digital signal processor for performing channel coding such as modulation and synchronization of an input / output signal through the digital / analog converter, and error correction; A MAC control unit for preventing a collision with other data by adding or removing a MAC header or the like to the transmission / reception data; A channel selector for selecting a data transmission channel under control of a user or a controller; It characterized in that it is configured as a control unit for controlling each component to enable a smooth data transmission.

In addition, the analog signal processing unit is characterized in that it comprises a signal processing means for each of the characteristics in accordance with the specifications, such as the characteristics of the transmission channel, the power limitation.

The channel selector may be configured to select and switch an appropriate signal system according to a user's channel mode selection, and detect whether a signal is output from the set signal system.

The controller may be configured to determine whether the channel mode setting is correct based on a signal detected from the signal system set by the channel selector so as to output or automatically change a channel change signal if it is wrong.

In addition, each component in the signal system of the channel not selected above is characterized in that the power is completely cut off so that no more power is consumed.

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

3 is a block diagram showing an example of the configuration of a data transmission apparatus for both a power line and a telephone line according to the present invention. As shown in FIG. 3, a signal suitable for the noise cancellation and channel transmission specification of a signal input / output through a transmission channel is shown. An analog signal processor 10 for performing processing; A digital-to-analog converter 20 for converting a signal input / output through the analog signal processor 10 to D / A or A / D; A digital signal processor (30) for performing channel coding such as modulation and synchronization of an input / output signal through the digital / analog converter (20) and error correction; A MAC control unit 40 for preventing a collision with other data by adding or removing a MAC (Media Access Control) header or the like to the transmission / reception data; A channel selector 50 for selecting a data transmission channel under the control of a user or the controller 60; The controller 60 is configured to control each component to enable smooth data transmission.

Here, in the case of using a power line, a coupling circuit (not shown) for removing a 60 Hz commercial AC power signal is included, and since the telephone line and the power line have different regulation such as channel characteristics or power limitation, an analog signal processor suitable for each characteristic 10a and 10b and digital / analog converters 20a and 20b.

When the same frequency band and the same modulation scheme are used for different components, the signal processing bands are the same.

Then, the operation and operation of the device configured as described above will be described in more detail.

First, when the user selects which channel mode to operate in, the channel selector 50 receives the information and receives the information of the analog signal processor 10 and the digital / analog converter 20 of the corresponding channel (telephone line or power line). Set up the signal system.

In addition, since each component in the signal system of the unselected channel does not need to operate, the controller 60 is notified of the fact so that the power is completely cut off or switched to the sleep mode so that no more power is consumed.

In addition, by detecting whether there is a signal from the set signal system and notifying the fact to the controller 60, it is determined whether the signal channel actually connected to the device and the channel set by the user are wrong.

In other words, if the channel actually connected is a telephone line, and the channel selection input is a power line, the user is notified of this to change the setting or determine the state of the channel so that the appropriate channel can be automatically set.

Next, when a signal is input through the channel set after the channel is set as described above, the analog signal processing unit 10 performs analog signal processing such as equalization, auto gain control (AGC), filtering, and the like. After the conversion unit 20 converts the digital signal into the digital signal processing unit 30 and passes through the digital signal processing process, it is transferred to the MAC control unit 40.

Accordingly, the MAC controller 40 outputs data to the central processing unit of the connected device after the process of removing the header of the MAC frame.

Meanwhile, when transmitting a signal through a corresponding channel, first, transmission data is input to the MAC control unit 40, and the MAC control unit adds a MAC header of a device to which information is to be received to make the MAC frame, and then digitally. The signal is transmitted to the processor 30.

Accordingly, the digital signal processing unit 30 performs modulation to suit the state of the channel, and performs a die conversion by the digital / analog conversion unit 20 so as to match the transmission characteristics of the channel by the analog signal processing unit 10 such as AGC. The analog signal is processed and output to an external device.

At this time, the control unit 60 controls the operation of the entire transmission device to be performed smoothly, by measuring the error rate of the received data to change the data transmission rate, or each parameter of the digital signal processing unit 30 to perform modulation It serves to optimally adjust.

Next, the MAC controller 40 is connected to the central processing unit of the external device to which the modem is connected, and adds a MAC header to data to be transmitted by the device. It plays a role.

As described above, the power line and telephone line combined data transmission apparatus of the present invention enables data transmission using a plurality of transmission channels, thereby providing flexibility without additional costs due to changes in circumstances in the home network market where the main infrastructure has not yet been determined. It has the effect of making it possible to cope.

Claims (5)

An analog signal processing unit for removing noise of an input / output signal through a transmission channel and performing proper signal processing according to a channel transmission standard; A digital / analog converter for converting input / output signals through the analog signal processor (D / A) or AD (A / D); A digital signal processor for performing channel coding such as modulation and synchronization of an input / output signal through the digital / analog converter, and error correction; A MAC control unit for preventing a collision with other data by adding or removing a MAC header or the like to the transmission / reception data; A channel selector for selecting a data transmission channel under control of a user or a controller; And a control unit configured to control the components to enable smooth data transmission. The data transmission apparatus as claimed in claim 1, wherein the analog signal processing unit is provided with analog signal processing means suitable for the characteristics according to the characteristics of the transmission channel, the power limit, and the like. 2. The data transmission system of claim 1, wherein the channel selector is configured to select and switch an appropriate signal system according to a user's channel mode selection, and to detect whether a signal is output from the set signal system. Device. The apparatus of claim 1, wherein the controller is configured to determine whether the channel mode setting is correct based on a signal detected from the signal system set by the channel selector and to output or automatically change a channel change signal if it is wrong. A data transmission device that can be used in multiple channels. 5. A component according to any one of claims 1 to 4, wherein each component in the signal system of the unselected channel is configured such that the power is completely cut off so that no more power is consumed. Data transmission device.