KR20000065899A - Data interface apparatus in terminal of the IMT-2000 network system - Google Patents

Abstract

PURPOSE: A data interface device in a terminal apparatus of an IMT-2000 network system is provided to support a high-speed data service or an internet service in which a maximum data transmitting and receiving rate is 2 Mbps by embodying a terminal device for applying interfaces such as a RS-232 interface, a RS-422, an ethernet, a USB, and a parallel print port. CONSTITUTION: A USART(universal synchronous asynchronous receiver transmitter)(21) supports a RS-422, a RS-232 and a parallel print interface between a terminal device and an external device and synchronously or asynchronously processes data of the external device. An ethernet controller(22) supports an ethernet interface between the terminal device and the external device. A USB(universal serial port) controller(23) supports a USB interface between the terminal device and the external device. A selector(24) outputs a selecting signal for enabling operations of the USART(21), the ethernet controller(22) and the USB controller(23) according to a control signal of a control unit(1). A RS-422 driver(25) performs a synchronous data process between the terminal device and the external device. A RS-232 driver(26) performs an asynchronous data process between the terminal device and the external device. A filter and pulse transformer(27) is connected to an ethernet controller(22) to perform an ethernet data process at a high speed between the terminal device and the external device.

Description

Data interface apparatus in terminal of the IMT-2000 network system

The present invention relates to a terminal device of an International Mobile Telecommunication (hereinafter, referred to as an "IMT")-2000 network system, in which a data interface device in the terminal device interfaces with an external device as well as RS-232. IMT- enables users to send and receive data up to 2Mbps and to provide various multimedia services by implementing Ethernet, Universal Serial Bus (USB), Parallel Print Port, etc. A data interface device in a terminal device of a 2000 network system.

Recently, a new IMT-2000 network system for providing mobile multimedia services for voice and non-voice systems using a common frequency band in the world has emerged, and such an IMT-2000 network system has a radio access network (Radio Access) for optimizing a wireless environment. Network (RAN), a transport network (CN) that performs high-speed transmission and exchange for multimedia services, and an intelligent network (IN) that provides various multimedia services. The function is configured to be distributed.

A terminal device is provided in the wireless access network. The terminal device is a CDMA method, a terminal used in a digital cellular system (DCS) or a personal communication system (PCS), and its configuration and function. It is almost the same in.

That is, as shown in FIG. 1, the terminal apparatus of the general IMT-2000 network system is configured to smoothly flow text, voice, and video data to provide various additional services such as text, voice, and video services. The control unit 1 performs the overall control function of the device, and the data interface unit 2 transmitting data input through an external device to perform various multimedia services to the modem unit through the control unit 1 or performing the reverse function thereof. And digital data of the ROM 3-1 storing the voice data processing program, the RAM 3-2 for temporarily storing the input / output voice data, and the analog data for the voice signal. Voice codec (3-3) which converts the digital data into analog data or vice versa. The audio signal is compressed and framed and transmitted to the modem unit, or the reverse function is performed. The audio processor 3 outputs the audio signal through the speaker, and the ROM 4-1 storing the image data processing program. It consists of a RAM 4-2 for temporarily storing the video data and an image codec unit 4-3 for converting analog data for the video signal into digital data or vice versa. The video signal input through the camera is compressed and framed with MPEG-4 (Moving Picture Expert Group) -4 for transmission to the modem unit or the reverse function to output the video signal through the LCD (Liquid Crystal Display) screen. The data of the processing unit 4, the data interface 2 passing through the control unit 1, the audio data of the audio processing unit 3 and the image processing unit ( MUX / demux (MUX /) which multiplexes the image data of 4) and transmits the data to the modem unit or performs the reverse function and outputs the corresponding data to the data interface unit 2, the audio processing unit 3, and the image processing unit 4, respectively. DEMUX) 5 and a modulator 6-1 which modulates data output through the MUX / demux 5 into a frame of a reverse link and transmits the data to an IF / RF (Intermediate Frequency / Radio Frequency) interface unit. And a demodulator 6-2 for receiving a baseband signal from the IF / RF interface unit and performing data demodulation functions, and receiving data from the demodulator 6-2 for de-interleaving and decoding ( A modem section 6-3 having a decoding section 6-3 for performing a decoding function, and performing a wide-code division multiple access (W-CDMA) demodulation function, and a baseband transmitted from the modem section 6; (Base-band) I component signal and Q component signal The I component signal and the Q component signal are combined and transmitted to an RF signal processor (not shown), or a reverse function converts an IF signal received from the RF signal processor into a baseband I component signal and a Q component signal. 6) and IF / RF interface unit 7 for outputting.

In the terminal device of the IMT-2000 network system configured as described above, conventionally, the data interface unit 2 UART (Universal Asynchronous Receiver Transmitter) 11 to asynchronously process the data of the external device as shown in FIG. ) And RS-232 driver (12) for asynchronous data processing and serial port (13) for connecting terminal device to external device. (Desktop) RS-232 interface is used only with external devices such as PC or notebook.

That is, conventionally, the RS-232 interface is applied as an interface between a terminal device and an external device, and thus data transmission and reception of a large amount of data is difficult because the data service is supported at a speed of 9.6 Kbps or 14.4 Kbps.

In addition, if the external device does not have a port for the RS-232 interface, it cannot be used, so there is a need to use only an external device with a port for the RS-232 interface.

As a result, the data interface device in the terminal device of the conventional IMT-2000 network system has to consider a lot of limitations when selecting other external devices and terminal devices because of the disadvantage of not being able to transmit and receive a large amount of data.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide an interface with an external device by using a Universal Synchronous Asynchronous Receiver Transmitter (USART) in a data interface device in a terminal device of an IMT-2000 network system. RS-232 as well as RS-422, Ethernet, USB, and parallel print ports can be used to transmit and receive data up to 2Mbps and provide various multimedia services. Is in providing.

1 is a block diagram of a terminal device of a general IMT-2000 network system;

2 is a block diagram of a data interface device in a terminal of a conventional IMT-2000 network system;

Figure 3 is a block diagram of a data interface device in a terminal device of the IMT-2000 network system according to the present invention.

<Description of the code | symbol about the principal part of drawing>

21: USART22: Ethernet Controller

23: USB controller 24: selector

25: RS-422 driver 26: RS-232 driver

27: filter and pulse transformer 28: parallel print port

29: first serial port 30: second serial port

31: Ethernet port 32: USB port

In order to achieve the above object, the data interface device in the terminal device of the IMT-2000 network system of the present invention selectively operates the USART, the Ethernet controller, and the USB controller by a selection signal of the selector according to the control signal of the controller. In case of selective operation, interface with external device is implemented by RS-422, RS-232, and parallel print port to perform synchronous and asynchronous data processing.In case of selective operation of Ethernet controller, interface with external device is connected to Ethernet interface. Ethernet data can be transmitted / received at high speed, and when the USB controller is selected, the interface with external devices can be implemented as USB to transmit / receive data of various peripheral devices. To provide a multimedia service do.

Hereinafter, the configuration and operation of a data interface device in a terminal device of an IMT-2000 network system according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of a data interface device in a terminal device of an IMT-2000 network system according to the present invention, and supports data of an external device by supporting RS-422, RS-232, and parallel print interface between the terminal device and an external device. USART 21 for processing synchronously or asynchronously, Ethernet controller 22 for supporting an Ethernet interface between a terminal device and an external device, USB controller 23 for supporting a USB interface between a terminal device and an external device, and a terminal device A selector 24 for outputting a selection signal for enabling the operations of the USART 21, the Ethernet controller 22, and the USB controller 23 according to a control signal of the internal control unit 1, and the USART 21; An RS-422 driver 25 for synchronous data processing between the terminal device and an external device and an RS-232 driver 26 for asynchronous data processing, and the Ethernet controller 22 A filter and pulse transformer 27 connected to the terminal and an external device so that Ethernet data processing is performed at a high speed, and the terminal and an external device are connected to each other while being connected to the USART 21. A panel print port 28 for printing a printout, a first serial port 29 for connecting a terminal device to an external device while being connected to the RS-422 driver 25, and the RS-232 driver 26. A second serial port 30 connected to a terminal device and an external device while being connected to the terminal), an Ethernet port 31 connected to the filter device and the pulse transformer 27 to connect the terminal device to an external device, and the USB controller. And a USB port 32 for connecting the terminal device to the external device.

As in the above configuration, the present invention implements the RS-232 interface and the print port interface while using the USART 21 to implement the RS-232 interface.

That is, by adding the RS-422 driver 25, the first serial port 29, and the parallel print port 28, data can be transmitted and received up to 2Mbps, and in the case of RS-422, EIA / TIA / IS-422A standard According to the data transmission rate of up to 10Mbps.

Referring to the operation of the data interface device in the terminal device of the IMT-2000 network system according to the present invention configured as described above are as follows.

First, when the selector 24 outputs an enable signal to the USART 21 according to the control signal output from the control unit 1 in the terminal device, the USART 21 is connected to the parallel print port 28 and the RS-422 driver ( 25) data transmission and reception with an external device is performed through the first serial port 29, the RS-232 driver 26, and the second serial port 30.

In this case, the USART 21 can process both data synchronously and asynchronously, so that the RS-422 interface can be used to process the data synchronously, and the data can be processed asynchronously, such as a conventional RS-232 interface or a print port. All of them are available.

That is, the interface to be applied depends on whether data is transmitted or received synchronously or asynchronously. In this case, the USART 21 can be used.

Here, the selection of the RS-422 driver 25 and the RS-232 driver 26 is determined by a transmission rate when data is transmitted and received. In RS-232, the transmission rate is 32 Kbps or less, that is, 28.8 Kbps, 18.2. Only Kbps, 14.4Kbps, and 9.6Kbps can be transmitted. In the case of RS-422, it can be transmitted until 32Mbps or more and 2Mbps or less, including 32Kbps or less.

In addition, when the parallel print port 28 is used, the data can be transmitted at a rate that can be transmitted through the parallel print port 28 as well as the data can be printed when the printer is connected.

Subsequently, when the selector 24 outputs an enable signal to the Ethernet controller 22, the Ethernet controller 22 transmits Ethernet data from an external device through the filter and pulse transformer 27 and the Ethernet port 31 at high speed. To send and receive data.

When using a desktop PC or laptop as an external device, such an Ethernet interface converts the Ethernet data format through an Ethernet card mounted on the desktop PC or laptop through the filter and the pulse transformer 27 to transmit and receive data at 2 Mbps at high speed. can do.

Finally, when the selector 24 outputs an enable signal to the USB controller 23, the USB controller 23 transmits and receives data of various peripheral devices at high speed through the USB port 32.

These USB interfaces can accommodate up to 127 peripherals with speeds up to 12Mbps and subchannel speeds of 1.5Mbps, and can replace serial / parallel ports.

As described above, when data such as video or pure packet data is input from the external device through various interfaces of the data interface unit 2 in the terminal device, the data is temporarily stored in the memory 1-1 of the controller 1. Transmitted to the modem unit 6 through the mux / demux 3, and then encrypted by adding CRC (Cyclic Redundancy Check) and data format information to the data in the modem unit 6 and converting it into an analog signal through RF processing. Make it and send it to the base station.

On the contrary, the analog signal transmitted from the base station is converted into digital data and transmitted to the modem unit 6, and then the various bits of the data interface unit 2 are removed by removing the encrypted bits and the CRC from the modem unit 6. It allows the external device to receive data so that it can be displayed and viewed on a desktop PC or laptop.

In the present invention, the RS-232 interface port as well as RS-422, Ethernet, USB, parallel print port can be transmitted and received data to and from the external device, when using the RS-232 interface, EIA / TIA / IS- It can transmit up to 20Kbps based on 232E, RS-422 interface with wired standard up to 10Mbps, Ethernet interface with wired up to 10Mbps or 100Mbps, wired standard up to 1.5Mbps (low speed) or 12Mbps (high speed) In case of using USB interface, it is possible to transmit / receive data up to 2Mbps.

As described above, the present invention implements a terminal apparatus to which not only an RS-232 interface but also an interface such as RS-422, Ethernet, USB, and a parallel print port are implemented. It can support not only services but also Internet services, and can also provide a variety of multimedia services because a large amount of data can be transmitted even when using a video device as an external device.

And, considering the interface applied by the PC has the advantage that can be used directly connected to the terminal device without changing the PC.

Claims (1)

Compression and frame processing of the control unit 1 performing the overall functions of the terminal device, the data interface unit 2 performing the interface between the terminal device and the external device, and the voice signal input through the microphone to perform a voice service. And a voice processing unit 3 for outputting a voice signal through a speaker by transmitting to a modem unit or performing a reverse function thereof, and compressing and framing a video signal input through a camera to a modem unit to perform a video service. An image processor 4 for transmitting or performing an inverse function and outputting an image signal through an LCD screen, data of the data interface unit 2 that has passed through the controller 1, and audio data and image of the voice processor 3; The image data of the processor 4 is multiplexed and transmitted to the modem unit, or the reverse function is performed to transmit the corresponding data to the data interface unit 2. A mux / demux 5 output to each of the audio processing unit 3 and the image processing unit 4, a modem unit 6 performing W-CDMA modulation and demodulation function, and a baseband transmitted from the modem unit 6 IF / modulated I, Q signal to IF signal and then transmitted to RF signal processor or IF function received from RF signal processor to baseband I, Q signal and then output to modem 6 In the terminal device of the IMT-2000 network system including the RF interface unit 7, The data interface unit 2 supports the RS-422, RS-232, and parallel print interfaces between the terminal device and the external device to process the data of the external device synchronously or asynchronously, and the terminal device and the external device. Ethernet controller 22 supporting an Ethernet interface between devices, a USB controller 23 supporting a USB interface between a terminal device and an external device, and the USART 21 according to a control signal of the controller 1 in the terminal device. A selector 24 for outputting a selection signal for enabling the operations of the Ethernet controller 22 and the USB controller 23, and connected to the USART 21 to perform synchronous data processing between the terminal device and an external device; RS-422 driver 25 and RS-232 driver 26 for performing asynchronous data processing, and connected to the Ethernet controller 22 to enable high speed Ethernet data processing between the terminal device and an external device. A filter and pulse transformer 27 configured to be connected to the USART 21, a panel print port 28 connected to a terminal device and an external device to print out data, and the RS-422 driver. A first serial port 29 connected to the terminal device to connect the external device to the terminal device; a second serial port 30 connected to the RS-232 driver 26 to connect the terminal device to the external device; Ethernet port 31 connected to the filter and the pulse transformer 27 to connect a terminal device and an external device, and a USB port 32 connected to the USB controller 23 to connect a terminal device and an external device. A data interface device in a terminal device of an IMT-2000 network system, characterized in that configured.