KR20030077317A - WLL terminal comprising FAX data transmission function - Google Patents

Abstract

PURPOSE: A WLL(Wireless Local Loop) terminal having a facsimile transmission function is provided to transmit and receive a document by wireless by adding a document input device and a document output device in the CDMA(Code Division Multiple Access) WLL terminal. CONSTITUTION: A scan motor(511A) and a print motor(511B) transfer a document, for scanning and outputting the document. A motor driving unit(512) controls the document transfer operation of the scan motor(511A) and the print motor(511B). A document input unit(515) scans the document transferred by the scan motor(511A), and receives document data. A document output unit(514) prints document data transmitted from a document converting unit(513) on the document transferred by the print motor(511B). The document converting unit(513) provides a document transfer command to the motor driving unit(512), converts the document data inputted through the document input unit(515) to be suitable for a set facsimile transfer protocol, and modulates the document data according to a set wireless communication scheme. The document converting unit(513) demodulates a wireless signal received from an object side, extracts document data, and transmits the extracted document data to the document output unit(514). A transmitting and receiving unit(518) transmits the wireless signal modulated by the document converting unit(513) through a wireless link, and transmits the wireless signal received through the wireless link to the document converting unit(513).

Description

Wireless subscriber network terminal with fax transmission function {WLL terminal comprising FAX data transmission function}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless local loop (WLL) terminal device, and more particularly, to wirelessly transmit and receive a document as a general fax machine in a code division multiple access (CDMA) type wireless subscriber network terminal. The present invention relates to a wireless subscriber network terminal device having a fax transmission function.

In general, a wireless subscriber network system performs a communication service to a subscriber using a radio frequency. A subscriber having a terminal may perform voice communication, data communication, and video communication through a wireless subscriber network.

As such, the wireless subscriber network system provides a communication service to a subscriber in an area where wired link is not easily applied using a wireless link. At this time, one of the wireless transmission / reception methods used is CDMA.

On the other hand, a fax (Facsimile, or FAX) is a communication device for transmitting various documents, drawings, photos and the like to a remote place. For telephone lines, there are G1, G2, G3, and G4 faxes, the specifications of the Consultative Committee for International Telephone & Telegraph (CCITT). G1 and G2 are analog, G3 and G4 are digital, and G3 fax is now commonly used.

1 is a block diagram of a general fax machine.

In order to transmit document data using a fax, a structure must be in place to scan a document and convert it into a form suitable for transmission via a wired link. Looking at the configuration of the fax machine with reference to Figure 1, a scan motor 11A for scanning a document, a print motor 11B for outputting a document, a motor for driving the scan motor 11A and the print motor 11B Central processing unit 13, central to operate the motor driving unit 12 according to the driving unit 12, the scanned document data and the document data received through the wired link to output the document through the print motor 11B The document output unit 14 and the document input unit 15, which are involved in the document output operation and the document input operation by assisting the function of the processing unit 13, respectively, A fax modem unit for exchanging document data with flash ROM 16, static RAM 17, and central processing unit 13 for temporarily storing data generated during processing to conform to the established fax transmission protocol. 18, and u It is a configuration including a wired line interface unit 19 in charge of the interface to the line line.

The configuration of the fax machine cited above relates to a general G3 fax machine, which uses the fax machine to transmit document data via a wired link between the sending and receiving fax machines.

Hereinafter, the prior art related to the implementation of the G3 fax function in the wireless subscriber network terminal.

2 is an operation block diagram of a wireless subscriber network terminal according to the prior art.

As shown in FIG. 2, in the prior art, in order to transmit / receive a document to the G3 fax 130 in the CDMA method, the G3 fax 130 is connected to the wireless subscriber network separation terminal 120 to transmit / receive the document. do. In the case of transmission, document data is simulated in the G3 fax 130 and transmitted wirelessly through the wireless subscriber network separation terminal 120, and the base station 114 receives the document data through the antenna 115 to the exchange 113. In the exchange 113, the transfer is performed to another G3 fax 12 corresponding to the designated destination. In case of reception, it operates in reverse order. Here, it is natural that voice or data communication may be performed between the wireless subscriber network detachable terminal 120 and the wired telephone 111 registered in the switch 113.

Therefore, inside the wireless subscriber network separation terminal 120, a circuit structure capable of line feeding (-48V), such as a wired line, and a circuit structure capable of modulating / demodulating a fax signal are additionally configured to transmit a FAX document in a CDMA method. / Make sure the reception is done.

3 is a detailed view of a wireless subscriber network terminal according to the prior art.

Referring to FIG. 3, the wireless subscriber network separation type terminal 120 includes a transceiver 121 for transmitting / receiving a radio signal, a radio converter 122 for converting a radio signal according to a CDMA scheme, and a radio converter 122. ) Is connected to the RS-232 cable and the like, and the fax signal processing unit 123 for processing the fax data, and the radio converter 122 exchanges the voice data or the fax signal processing unit 123 and fax data by exchanging the fax data with the terminal ( It comprises a wired line interface unit 124 for performing an interface with the G3 fax 130 connected to 120.

The wire line interface unit 124 and the G3 fax 130 exchange the ring signal Ring and the tip signal Tip to check the connection state.

The transmission operation of the fax data according to such a configuration will be described in detail by way of example.

First, the operation and processing operation of the fax machine, the user inserts a document in the fax transmission unit of the G3 fax 130 and dials to confirm the call connection status with the other fax (receiving side fax). Check the connection status of the call, and press the 'Start' button on the sending fax machine to start sending. The document input unit (or document scan unit) of the fax machine inputs document data, and the central processing unit in the fax machine compresses it (MH or MR method). The compressed text information is modulated into a fax signal through a fax modem and transmitted to the wireless subscriber network split terminal 120 through a wired line.

The wireless subscriber network detachable terminal 120 receives the transmission side fax sound through the wire line interface unit 124. The fax signal processor 123 inside the wireless subscriber network separation terminal 120 demodulates the fax sound to confirm the information, and if the compressed document data is decompressed, it decompresses and reduces the original document information. The fax signal processor 123 transmits the reduced document data to the wireless converter 122 through an RS-232 cable. The radio conversion unit 122 may be implemented with an MSM chip that manages radio processing in the CDMA system. The wireless conversion unit 122 compresses and modulates the document data transmitted from the central processing unit of the fax machine for wireless transmission (QPSK method) and transmits the data to the wireless section using the transmission / reception unit 121.

In the case of the CDMA base station, the base station 114 demodulates and decompresses a signal transmitted from the wireless subscriber network separation terminal 120 to reduce document data. The returned document data is transmitted as a fax tone to the receiving side fax 112 connected to the wired line through the exchange.

Then, by restoring the document according to the fax tone at the receiving side fax 112, the document data scanned at the transmitting side fax 130 is wirelessly transmitted by the CDMA method via the wireless subscriber network separation terminal 120, and then the receiving side fax ( 112).

However, according to the related art described above, since the wireline interface interface and the fax signal processing unit must be provided inside the wireless subscriber network separate terminal, the configuration is complicated due to the use of a large number of components, the possibility of defects is high, and the price of the terminal is increased. There is a drawback to this.

In addition, when applying this configuration method, it is inconvenient to use a separate FAX terminal such as a separate wireless subscriber network and a G3 fax machine.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to add a document input device and a document output device to a CDMA wireless subscriber network terminal to wirelessly transmit and receive a document like a normal fax machine. It is to provide a wireless subscriber network terminal device having a fax transmission function.

A wireless subscriber network terminal device having a fax transmission function of the present invention for achieving the above object comprises: a document driver for transferring a document for scanning and outputting a document; A drive control unit for controlling a document transfer operation of the document drive means; A document input unit for scanning document transferred by the document driving means and receiving document data; A document output unit for printing the document data transmitted by the radio conversion unit to the document transferred by the document driving means; Send a document transfer command to the drive control unit, convert the document data input through the document input unit to conform to the set fax transmission protocol, modulate it according to the set wireless communication method, and demodulate the document by demodulating the wireless signal received from the other party. A wireless converter for extracting data and transferring the extracted data to the document output unit; It characterized in that it comprises a radio transceiver for transmitting the radio signal modulated by the radio conversion unit via a radio link, and for transmitting a radio signal received through the radio link to the radio conversion unit.

1 is a block diagram of a typical fax machine.

Figure 2 is a block diagram of the operation of the wireless subscriber network terminal according to the prior art.

Figure 3 is a detailed view of a wireless subscriber network terminal according to the prior art.

4 is a block diagram of a wireless subscriber network system to which the present invention is applied.

Figure 5 is a block diagram of a wireless subscriber network terminal device having a fax transmission function according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

411: landline telephone 412: fax

413 switchboard 414 base station

415: base station antenna 416: wireless subscriber network terminal

511A: Scan Motor 511B: Print Motor

512: motor drive unit 513: wireless conversion unit

514: document output unit 515: document input unit

516: flash ROM 517: static RAM

518: transceiver

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 4 is a block diagram of a wireless subscriber network system to which the present invention is applied, Figure 5 is a block diagram of a wireless subscriber network terminal device having a fax transmission function according to an embodiment of the present invention.

This embodiment adds a fax function to a wireless subscriber network terminal.

According to FIG. 4 showing the configuration of a CDMA base station and a wireless fax machine supporting the CDMA scheme, the present embodiment is connected to a plurality of landline telephones 411 and switchboards 413 that are responsible for transmitting voice data through trunk lines. Local fax 412 that is responsible for transmitting / receiving document data, switch 413 that is responsible for trunk line exchange function, and is responsible for transmission of radio signals through CDMA method between switch 413 and wireless subscriber network terminal 416. Base station antenna 415 for forming a wireless link between the base station 414, the base station 414 and the wireless subscriber network terminal 416, and the transmission of radio signals and audio data and document data through the wireless subscriber network of the CDMA method And a wireless subscriber network terminal 416 in charge of the processing.

The wireless subscriber network terminal 416 has its own fax function. Thus, even if a fax machine such as a G3 fax machine is not provided separately, a function of transmitting / receiving document data through a terminal, converting a document to a fax tone, and restoring a fax sound to a document is provided in the terminal 416 itself. All will be equipped.

In order to implement the G3 fax function in the CDMA wireless subscriber network terminal device, the document input unit and the document output unit used in the fax machine should be added to the wireless subscriber network terminal device.

Thus, this embodiment adds a document input unit, a document output unit, and a drive and control block of motors for inputting and outputting a document to the wireless subscriber network terminal 416 so as to mechanically input and output the document.

That is, as shown in FIG. 5 showing the detailed structure of the wireless subscriber network terminal 416, a scan motor 511A for scanning a document, a print motor 511B for scanning a document, and a scan motor 511A and the like. The motor driver 512 for driving the print motor 511B converts and transmits the scanned document data, interprets the document data received through the wireless link, and controls the motor driver 512 to output the document. In the process of processing the information and document data necessary for starting the radio conversion unit 513, the document output unit 514 and the document input unit 515, and the radio conversion unit 513 involved in the document output operation and the document input operation, respectively. A flash ROM 516 and a static RAM 517 for temporarily storing the generated data, and a transceiver 518 for transmitting / receiving a wireless signal through a wireless link by exchanging document data with the wireless converter 513. It is made to include. The radio conversion unit 513 may be implemented using an MSM chip.

During the processing of data through a wireless link and a wire link with a terminal device according to this configuration, an example of an operation of copying a document from the wireless subscriber network terminal 416 to a local fax 412 connected to the exchange 413 Explain.

In the CDMA wireless fax transmission operation, the document supplied in the document input unit 515 is moved to the input reference point by driving the scan motor 511A to transmit the document, and then, when the document becomes the input reference point, The scanning device scans light to receive document information.

Dark areas are 'low' and light areas are 'high' respectively (or black: '0' and white: '1'). The radio conversion unit 513 first compresses this information using a fax compression method (MH or MR method).

The first compressed document data is again second compressed for radio section transmission.

The secondary compressed data is modulated (QPSK modulated) by the radio converter 513 and then sent to the transceiver 518 to be wirelessly transmitted through the antenna in a CDMA manner.

The CDMA base station 414 receives this signal and demodulates it again using the CDMA scheme.

The demodulated information is decompressed and passed through the exchange 513 in the first compressed state, and then transmitted to the receiving local fax 412.

The receiving local fax 412 decompresses the compressed document information to interpret the document data, thereby enabling document output.

The document transmission is performed in the above process, and the reception process of the document is reversed.

Meanwhile, in order to support the existing wireless subscriber network detachable function (when using a wired telephone), a wireline interface circuit may be further provided. Optionally, in the case of further comprising a wired line interface circuit, the wired line interface circuit may be connected to the wireless conversion unit 513 and connected to and operated by a wired telephone.

The embodiments described above are within the scope of various changes, modifications, and equivalents of the present invention. Therefore, the present invention is not limited to the description of the examples.

According to the wireless subscriber network terminal apparatus having a fax transmission function of the present invention, the terminal apparatus itself can transmit / receive documents using the G3 fax system by the CDMA method. The system can be simplified and the system configuration for the facsimile function is low, so that the price competitiveness can be secured, and the document transmission / reception function can be performed without having the wireless subscriber network terminal device and the G3 fax machine at the same time. There is an advantage.

Claims (2)

A document driver for transferring the document for scanning and outputting the document; A drive control unit for controlling a document transfer operation of the document drive means; A document input unit for scanning document transferred by the document driving means and receiving document data; A document output unit for printing the document data transmitted by the radio conversion unit to the document transferred by the document driving means; Send a document transfer command to the drive control unit, convert the document data input through the document input unit to conform to the set fax transmission protocol, modulate it according to the set wireless communication method, and demodulate the document by demodulating the wireless signal received from the other party. A wireless converter for extracting data and transferring the extracted data to the document output unit; And a wireless transmission / reception unit for transmitting a radio signal modulated by the radio conversion unit through a radio link, and for transmitting a radio signal received through the radio link to the radio conversion unit. Subscriber terminal device. The wireless subscriber network terminal apparatus according to claim 1, further comprising a wireline interface unit for exchanging voice data and document data with the radio conversion unit through a wired link.