KR20000030918A - Interface unit of mobile communication terminal - Google Patents

Abstract

PURPOSE: An interface unit of a mobile communication terminal is provided to form an interface between a cellular phone and a computer without a cable. CONSTITUTION: An interface unit of a mobile communication terminal comprises a computer(200) having a serial I/O port(201) and a cellular phone(100) having an outer I/O port(101). The cellular phone comprises an encoder(102) for converting an output data to an infrared radio data, an IrDA(Infra structure red Data Association) port(104) for receiving the infrared radio data, and a decoder(103) for converting the infrared data. The computer comprises an EIA-232(205) for converting a serial data to a general logic level, an encoder(202) for converting the general logic level to an infrared radio data, an IrDA port(204) for receiving the infrared radio communication data from the cellular phone, and a decoder(203) for converting the infrared radio communication data to the serial data.

Description

Interface device of cellular wireless communication terminal

The present invention relates to an interface of a personal communications service (PCS) terminal or a mobile phone terminal. More particularly, the present invention relates to cellular and cellular communication when a mobile communication system is used as a medium for transmitting and receiving information in a data communication using a computer. The present invention relates to an interface device of a cellular wireless communication terminal for establishing a communication environment by infrared communication without connecting a cable between terminals (hereinafter, referred to as a "cell phone").

As is well known, a mobile communication system sends a call message including a unique number of a called terminal to a cellular phone through a call control channel of a base station to call a cellular phone, and provides a call path when a response is received from the cellular phone. It is to be given.

Such cellular phones generally have a built-in transmitter and receiver, and a device that enables two-way communication at a long distance by using a radio signal to connect a line between a portable device and a fixed device of a general telephone. The purpose is to pursue the convenience and mobility of telephone calls.

Meanwhile, in recent years, data communication is enabled by adopting a digital communication method in a cellular phone, and in another aspect, another purpose is to provide various services through such wireless data communication.

In particular, a wireless data communication system using a cellular phone as a medium for transmitting and receiving information is represented by a method using a serial port of a computer and a PCMCIA card mainly applied to a notebook computer.

However, both of these methods must establish an interface between the computer and the cellular phone, and such an interface device includes a device as shown in FIG. 1 or 2.

1 and 2 will be described as an example of a cellular phone interface according to the prior art.

1 is a configuration diagram of a wireless data communication system using a serial port, in which an external I / O port 11 of a cellular phone 10 and a serial I / O port 21 of a computer 20 are connected to a cable 30. It is connected.

2 is a configuration diagram of a wireless data communication system using a PCMCIA card, in which an external I / O port 11 of a cellular phone 10 and a PCMCIA card 41 of a computer 40 are connected by a cable 30. .

In the above-described conventional cellular phone interface, it can be seen that the interface between the cellular phone and the computer is established by a cable.

Therefore, in part, wireline communication has not been considered a complete wireless data communication system, and there is an inherent problem of connecting and disconnecting cables every time.

In particular, a wireless data communication system using a PCMCIA card has a feature that enables high-speed data transmission, but since the PCMCIA card must be installed in a computer, there is a problem in that the cost is increased.

Therefore, a cell phone capable of creating an effect equal to or higher than the conventional one while eliminating the cable used for the interface between the cell phone and the computer is desirable.

Accordingly, the present invention excludes the inconvenience of having to connect or disconnect the cable between the cellular phone and the computer each time in the construction or disassembly of the wireless data communication system, and the present invention provides an interface between the cellular phone and the computer. Its purpose is to provide a complete wireless data communication system by building an infrastructure using IrDA (Infrastructure red Data Association) port.

1 is a configuration diagram of a wireless data communication system using a conventional serial port,

2 is a configuration diagram of a wireless data communication system using a PCMCIA card,

3 is a block diagram of a wireless data communication system using infrared rays according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: cell phone 101: external I / O port

102,202: encoder 103,203: decoder

104204: IrDA port 200: computer

201: Serial I / O Port 205: EIA-232

According to another aspect of the present invention, there is provided a cellular phone interface device including a computer with a serial I / O port and a cellular phone with an external I / O port.

The cell phone,

An encoder for converting output data of the external I / O port into infrared wireless communication data; An IrDA port for transmitting the infrared wireless communication data and receiving infrared wireless communication data from the computer; A decoder for converting the received infrared wireless communication data into a standard format and transferring the received infrared wireless communication data to the external I / O port;

The computer,

An EIA-232 for converting serial data of the serial I / O port to a general logic level; An encoder for converting the general logic level data into infrared wireless communication data; An IrDA port that transmits the infrared wireless communication data and receives infrared wireless communication data from the cellular phone; And a decoder for converting the received infrared wireless communication data to a general logic level, transferring the received infrared wireless communication data to the EIA-232, converting the received infrared wireless communication data into serial data, and then transmitting the serial data to the serial I / O port.

In this way, it can be seen that a wireless data communication system can be constructed by infrared wireless communication without connecting a cable between the cellular phone and the computer.

As a result, the inconvenience of having to connect or disconnect the cable between the cellular phone and the computer every time when constructing or disassembling the wireless data communication system is eliminated, and there is an advantage that a complete wireless data communication system can be constructed.

And, there may be a plurality of embodiments of the present invention, hereinafter will be described in detail with respect to the most preferred embodiment.

This preferred embodiment allows for a better understanding of the objects, features and advantages of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the cell phone interface device according to the present invention.

In addition, the technology of the present invention can transmit and receive data through wireless communication, such as a wireless telephone or a cellular phone, it can be applied to various products such as hands-free.

Therefore, FIG. 3 used in the description focuses on various interface devices capable of transmitting and receiving data through wireless communication, rather than specific cellular wireless communication terminals.

However, the following considers an example of using a cell phone to help understand the description.

3 is a block diagram of a cellular phone interface device according to the present invention, including an encoder 102 for converting output data of an external I / O port 101 in a cellular phone 100 into infrared wireless communication data, and the infrared ray. IrDA port 104 for transmitting wireless communication data and receiving infrared wireless communication data from computer 200, and a decoder for converting the received infrared wireless communication data into a standard format and forwarding it to external I / O port 101. 103, an EIA-232 205 for converting serial data of the serial I / O port 201 in the computer 200 to a general logic level, and converting the data of the general logic level into infrared wireless communication data. An encoder 202, an IrDA port 204 for transmitting the infrared wireless communication data and receiving infrared wireless communication data from the cellular phone 100, and converting the received infrared wireless communication data to a general logic level. And a decoder 203 that is passed to the EIA-232 205 to be converted to serial data and then to the serial I / O port 201.

The cellular phone interface device according to the present invention made as described above performs infrared wireless communication between the cellular phone and the computer as follows.

First, data output from the external I / O port 101 in the cellular phone 100 is converted into infrared wireless communication data through the encoder 102 and transmitted to the computer 200 through the IrDA port 104.

Then, the IrDA port 204 of the computer 200 receives and transmits the infrared wireless communication data transmitted from the cellular phone 100 to the decoder 203, and the data converted to the general logic level at the decoder 203 is It is converted to serial data through the EIA-232 205 and transmitted to the serial I / O port 201.

Conversely, the serial data output from the serial I / O port 201 of the computer 200 is converted to a serial logic asynchronous standard format of general logic level in the EIA-232 205, and again through the encoder 202 for infrared wireless communication. The data is converted into data and transmitted to the cellular phone 100 through the IrDA port 204.

Then, the IrDA port 104 of the cellular phone 100 receives the infrared wireless communication data transmitted from the computer 200 and transmits it to the decoder 103, and the data converted into the standard format by the decoder 103 is external I. It is forwarded to / O port 101.

On the other hand, as a comparative example, unlike the conventional technology, that is, the cable connection between the cellular phone and the computer, the present invention can be seen that the information is transmitted and received through the infrared wireless communication.

As a result, according to the present invention, the inconvenience of having to connect or disconnect the cable between the cellular phone and the computer every time when constructing or disassembling the wireless data communication system is eliminated, and a complete wireless data communication system can be constructed.

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that various modifications may be made by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

It is clear from the above description that, according to the interface device of the cellular phone according to the present invention, not only can a complete wireless data communication system be constructed by infrared wireless communication but also a wireless data communication without connecting a cable between the cellular phone and a computer. When building or dismantling the system, the inconvenience of connecting or disconnecting the cable between the cellular phone and the computer is eliminated.

Claims (1)

In a wireless data communication system comprising a computer with a serial I / O port and a cellular wireless terminal with an external I / O port: The cellular wireless communication terminal, An encoder for converting output data of the external I / O port into infrared wireless communication data; An IrDA port for transmitting the infrared wireless communication data and receiving infrared wireless communication data from the computer; A decoder for converting the received infrared wireless communication data into a standard format and transferring the received infrared wireless communication data to the external I / O port; The computer, An EIA-232 for converting serial data of the serial I / O port to a general logic level; An encoder for converting the general logic level data into infrared wireless communication data; An IrDA port for transmitting the infrared wireless communication data and receiving infrared wireless communication data from the cellular wireless communication terminal; And a decoder for converting the received infrared wireless communication data to a general logic level, transferring the received infrared wireless communication data to the EIA-232, converting the received infrared wireless communication data into serial data, and transmitting the serial data to the serial I / O port.