KR20040016712A - Communication apparatus and method for personal digital assistant connected mobile terminal - Google Patents

Abstract

PURPOSE: A communication device for a PAD(Personal Digital Assistant) connected with a mobile communication terminal and a method therefor are provided to improve a communication function by installing a communication module of the mobile communication terminal in the PDA. CONSTITUTION: A PDA(20) has a network processing unit(22). The network processing unit(22) transmits a communication command to an external communication module connected through a serial port(21), receives result data with respect to the communication command, and transmits the result data to an upper layer. A mobile communication terminal(10) has a wireless modem(12) and a transceiver(11). The wireless modem(12) encodes data transmitted through the serial port(21) according to a communication standard, and outputs the encoded data. The wireless modem(12) decodes data transmitted from a base station, and outputs the decoded data to the network processing unit(22). The transceiver(11) modulates the output signal of the wireless modem(12) into an RF(Radio Frequency) analog signal, and transmits the RF analog signal to the base station through an antenna. The transceiver(11) converts a signal received from the antenna into a baseband signal, and outputs the baseband signal to the wireless modem(12).

Description

TECHNICAL APPARATUS AND METHOD FOR PERSONAL DIGITAL ASSISTANT CONNECTED MOBILE TERMINAL

The present invention relates to a communication device and a method of a portable information terminal connected to a mobile communication terminal, and in particular, to connect a portable information terminal to a network using a wireless modem embedded in the mobile communication terminal without using an expansion pack that enables connection to a network. The present invention relates to a communication device and a method of a portable information terminal connected to a mobile communication terminal.

Generally, a portable information terminal is a small computer having an operating system of the same type as a personal computer. The portable information terminal is small enough to be carried in a hand, and has an application program that is easy to carry and handles simple personal tasks. It has the advantage of being wider and more practical than a portable computer such as a notebook.

The portable information terminal is suitable for operating personal information systems such as portable e-books, schedule management, and stock information. In particular, the portable information terminal enables wireless Internet access and data communication through connection with a mobile communication terminal. The use of furnaces has increased.

There is a portable information terminal connected to an expansion pack to add a communication function to such a portable information terminal to enable an additional service of various contents.

As an embodiment of the expansion pack of the portable information terminal, Korean Patent Laid-Open Publication No. 2002-0022738 (Expansion Terminal Expansion Pack) is implemented to be mounted on the portable information terminal to perform voice and data communication, and received through an antenna. A high frequency receiver for frequency converting and amplifying a high frequency analog signal and demodulating a digital signal, and decoding data from the digital signal output from the high frequency receiver to a control unit and converting the data transmitted from the control unit according to a communication standard A data communication unit comprising a data communication unit for exchanging a call signal with a peripheral device through a control unit, a high frequency transmission unit for receiving a digital signal from the data communication unit, modulating a high frequency analog signal, and transmitting the digital signal through the antenna; A voice communication unit configured to implement a voice call by modulating and demodulating voice data transmitted and received in association with the data communication unit, and a communication unit converting a voice signal and an electric signal and transmitting and receiving the electric signal to the voice processing unit; ; An expansion unit including a connector coupled to the connection terminal, a connection terminal for connecting an external device for adding a functional extension to the portable information terminal, and an expansion slot for expansion of the memory unit, the data communication unit, and the expansion unit. Expansion means comprising a connection control unit for providing an interface through which a connected external device communicates with the control unit; A battery unit for supplying operation power to the data communication means, the voice processing unit and the expansion means, and a power terminal for connecting an external power source, and connected to the connector, wherein the battery unit and the terminal power supply unit are connected by the external power source. A power supply unit comprising a charging unit for charging and a switch unit connected to the battery unit to control power supply of the battery unit; And an alarm unit configured to receive an incoming signal from the data communication unit to generate sound or vibration such as an alarm sound and a melody, and to switch or interlock an operation of generating the sound and vibration by the controller.

Looking at the prior art configured as described above, by providing an expansion pack for the information terminal detachable to the portable information terminal to implement a communication function to enable the portable information terminal to enable voice and data communication.

The expansion means includes an expansion unit such as an infrared connection port, a universal serial bus connection port, a serial connection port, and an expansion slot to add a functional extension to the portable information terminal through various external devices connected to the expansion unit.

However, in the prior art as described above, since a communication module is required to access the wireless Internet, there is a problem that an expansion pack must be provided in the portable information terminal.

Accordingly, the present invention has been made in view of the above-mentioned problems, and the communication module of the mobile communication terminal used by many users is mounted on the portable information terminal to improve the communication function and the battery power is redundant, thereby increasing the power usage time. It is an object of the present invention to provide a communication device and method of a portable information terminal connected to a mobile communication terminal.

1 is a block diagram showing the configuration of a communication device of a portable information terminal connected to a mobile communication terminal according to the present invention;

2 is a flowchart illustrating a communication method of a portable information terminal connected to a mobile communication terminal according to the present invention.

3 is an exemplary view showing a connection configuration of a mobile communication terminal and a portable information terminal according to the present invention.

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

10: mobile communication terminal 11: transceiver

12: wireless modem 13: serial port

20: portable information terminal 22: network processing unit

According to an aspect of the present invention, there is provided a portable information terminal including a network processor for transmitting a communication command to an external communication module connected through a serial port, receiving a result data, and transmitting the result data to an upper layer; A wireless modem which encodes and outputs data transmitted through the serial port according to a communication standard, decodes data transmitted from a base station, and outputs the data to the network processor, and modulates an output signal of the wireless modem into a high frequency analog signal to antenna It characterized in that it comprises a mobile communication terminal comprising a transceiver for transmitting to the base station through the frequency and the signal received from the antenna down to the baseband frequency output to the wireless modem side.

In addition, the communication command transfer step for transmitting a communication command transmitted from the upper layer in the network processing unit to the external communication module through the serial port; A network connection step of connecting to an external communication network according to a communication command transmitted from the network processor in a wireless modem; A data transmission and reception step of transmitting data transmitted from the network processor to an external communication network and receiving data transmitted from an external communication network when the wireless modem is connected to the external communication network; The wireless modem may be operated as a data transfer step of transferring data received from the external communication network to a network processor through a serial port.

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

1 is a block diagram showing the configuration of a communication device of a portable information terminal connected to a mobile communication terminal according to the present invention. As shown in FIG. 1, a communication command is transmitted to an external communication module connected through a serial port 21 and A portable information terminal 20 including a network processor 22 for receiving the result data and delivering the result data to an upper layer; A wireless modem 12 which encodes and outputs data transmitted through the serial port 21 according to a communication standard, decodes data transmitted from a base station, and outputs the decoded data to the network processor 22; and the wireless modem 12 A mobile communication terminal comprising a transceiver 11 for modulating an output signal of a high frequency analog signal, transmitting the signal to a base station through an antenna, and frequency-reducing the signal received from the antenna to a baseband and outputting the signal to the radio modem 12 side. It consists of (10).

2 is an operation flowchart of a communication method of a portable information terminal connected to a mobile communication terminal according to the present invention. As shown in FIG. 2, a communication command transmitted from an upper layer in a network processor is transmitted to an external communication module through a serial port. A communication command delivery step (S1); A network connection step (S2) of connecting to an external communication network according to a communication command transmitted from the network processing unit in a wireless modem; A data transmission and reception step (S3) of transmitting data transmitted from the network processor to an external communication network and receiving data transmitted from an external communication network when the wireless modem is connected to the external communication network; An embodiment of the present invention will be described with reference to the drawings, which comprises a data transfer step (S4, S5) of transferring data received from the external communication network to a network processing unit through a serial port in a wireless modem.

The portable information terminal 20 connects the mobile communication terminal 10 to the slot in which the external communication module is mounted, as shown in FIG. 3.

The portable information terminal 20 transmits a communication command to the network processor 22 in order to use various communication services by accessing the Internet through the mobile communication terminal 10.

The network processor 22 transmits a communication command to the wireless modem 12 of the mobile communication terminal 10 through serial ports 13 and 21, which are connection paths for data communication with the mobile communication terminal 10.

The wireless modem 12 connects to an external communication network according to a communication command received from the network processor 22 and sets an environment in which data can be transmitted and received with each other.

The wireless modem 12 wirelessly communicates with the base station through the transceiver 11 and the antenna, transmits data transmitted from the network processor 22, and decodes the data received from the base station to the network processor 22.

The network processor 22 transmits data received from the wireless modem 12 to a higher layer to perform data communication with an external communication network.

As described in detail above, the present invention does not require an expansion pack, which is a separate communication module, by using a wireless modem of a mobile communication terminal when the portable information terminal connects to the Internet. Because of the use, it is possible to increase the battery life of the portable information terminal.

Claims (2)

A portable information terminal including a network processor for transmitting a communication command to an external communication module connected through a serial port, receiving a result data thereof, and transmitting the result data to an upper layer; A wireless modem which encodes and outputs data transmitted through the serial port according to a communication standard, decodes data transmitted from a base station, and outputs the data to the network processor, and modulates an output signal of the wireless modem into a high frequency analog signal to antenna And a mobile communication terminal configured to transmit a signal to a base station through a base station, and a frequency downlink to a baseband to output the signal to the wireless modem. A communication command transfer step of transmitting, by the network processor, a communication command transmitted from an upper layer to an external communication module through a serial port; A network connection step of connecting to an external communication network according to a communication command transmitted from the network processor in a wireless modem; A data transmission and reception step of transmitting data transmitted from the network processor to an external communication network and receiving data transmitted from an external communication network when the wireless modem is connected to the external communication network; And a data transfer step of transferring data received from the external communication network to a network processing unit through a serial port in a wireless modem.