KR20070121446A - Apparatus and method for telecommunication through public switched telephone network in portable terminal - Google Patents

Abstract

An apparatus and a method for executing communication through a PSTN(Public Switched Telephone Network) in a portable terminal are provided to install a CTP(Cordless Telephony Profile) gateway in a portable terminal so that a user can directly access a PSTN and execute communication through the PSTN, even in a place where an AP is not installed. A PSTN communication part(111) in a portable terminal comprises a selection part(201), a Bluetooth module(203), a CTP gateway(205), and a PSTN access part. The selection part(201) switches either the Bluetooth module(203) or the CTP gateway(205) according to selection for a direct connection with a PSTN or a connection through an AP. The Bluetooth module(203) executes procedures to make a connection with an AP for access to the PSTN, and transmits and receives signals which are created according to a voice call. The CTP gateway(205) converts Tx data, created according to a voice call, into suitable signals for the PSTN. Also the CTP gateway(205) converts signals, received through the PSTN, into data. The PSTN access part, directly connected to the PSTN, outputs signals, provided from the CTP gateway(205), to the PSTN. Also the PSTN access part outputs signals, received from the PSTN, to the CTP gateway(205).

Description

Apparatus and method for communicating over a public telephone network in a portable terminal {APPARATUS AND METHOD FOR TELECOMMUNICATION THROUGH PUBLIC SWITCHED TELEPHONE NETWORK IN PORTABLE TERMINAL}

1 is a block diagram of a portable terminal according to the present invention;

2 is a diagram showing a block structure of a public telephone network communication unit according to the present invention; and

3 is a diagram illustrating a procedure for making a voice call through a public telephone network in a portable terminal according to an embodiment of the present invention.

The present invention communicates using the public telephone network without an access point (AP) required for connection to the public telephone network in a portable terminal having a One Phone function supporting both a mobile telephone network and a public switched telephone network (PSTN). An apparatus and method for performing the same.

Recently, researches for integrating wireless communication equipment have been actively conducted. One of the integrated technologies among the communication equipment is a technology for providing a voice call using a public telephone network in the portable terminal, which is called a one-phone function in the portable terminal. The user can be provided with a low cost and sound quality voice call through the one-phone function, and is provided with the convenience of not installing a separate telephone for the public telephone network.

The one-phone function is a function of supporting a voice call through the public telephone network embedded in a home or the like in a portable terminal. In order to support the one-phone function, the portable terminal must have a Bluetooth module and a separate AP is required. The AP includes a Bluetooth module for Bluetooth communication with the portable terminal and a Cordless Telephony Profile (CTP) gateway that handles signal exchange between the public telephone network and the portable terminal. Here, the CTP is a profile for mutually transceiving a DTMF (Dual Tone Multi Frequency) signal and a voice signal between the portable terminal and the public telephone network. In other words, during a voice call using the public telephone network, the portable terminal communicates with the AP through the Bluetooth module, and the AP connected to the public telephone network processes signal exchange between the portable terminal and the public telephone network according to the CTP.

As described above, the public telephone network may be used in the portable terminal through the AP. However, the user has a problem in that the portable terminal possesses the one-phone function and the user cannot perform communication using the public telephone network even if the AP is not installed even though the portable terminal possesses the one-phone function.

Accordingly, an object of the present invention is to provide an apparatus and method for performing communication using a public telephone network in a portable terminal.

Another object of the present invention is to provide an apparatus and method for including a function of an AP used in a portable terminal when connecting to a public telephone network.

Still another object of the present invention is to provide an apparatus and method for directly communicating with a public telephone network or connecting through an AP in a portable terminal to perform communication.

According to a first aspect of the present invention for achieving the above object, a method for making a voice call using a public telephone network in a portable terminal, when the transmission data is generated, the public to transmit the data directly through the public telephone network And converting the signal into a signal conforming to a standard of a telephone network, and transmitting the signal directly to the public telephone network.

According to a second aspect of the present invention for achieving the above object, a portable terminal device, a control unit for controlling to directly transmit and receive data through the public telephone network, when communicating using a public telephone network, and the data provided according to the communication; And a public telephone network connection unit connecting the public telephone network with the CTP gateway.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, the present invention describes a technology for performing communication by directly connecting with a public telephone network according to a user's selection in a portable terminal. In the following description, it is assumed that the portable terminal provides a one phone function. In addition, in the following description, the communication will be described taking a voice call as an example. Here, the one-phone function refers to a function of supporting both a mobile telephone network (for example, code division multiple access (CDMA) network) and a public switched telephone network (PSTN) in one portable terminal.

1 shows a block configuration of a portable terminal according to the present invention. In the following description, the portable terminal includes a cellular phone having a one-phone function, a personal communication system (PCS), a personal data assistant (PDA) and an international mobile telecommunication-2000 (IMT2000) terminal. It is meant to include both, and will be described with the general configuration of the above examples.

Referring to FIG. 1, the portable terminal includes a control unit 101, a display unit 103, an input unit 105, a codec 107, a mobile telephone network communication unit 109, a public telephone network communication unit 111, and a memory 113. It is configured to include.

The controller 101 controls the overall operation of the portable terminal. For example, it performs processing and control for voice calls and data communications. In particular, the present invention controls a function for performing communication by directly connecting with a public telephone network.

The display unit 103 displays state information, numbers, letters, and images generated during the operation of the portable terminal. The input unit 105 includes a keypad of the portable terminal and provides key input data corresponding to a key pressed by the user to the controller 101.

The coder (CODEC: COder-DECoder) 107 converts PCM (Pulse Code Modulation) data provided from the controller 101 into an analog voice signal and outputs it through a speaker, and outputs an analog voice signal input through a microphone. The data is converted into PCM data and output to the controller 101.

The mobile telephone network communication unit 109 processes signals transmitted and received through the mobile telephone network.

The public telephone network communication unit 111 processes a signal for communication using a public telephone network. In particular, according to the present invention by directly connecting to the public telephone network or through the AP, and processes the signal transmitted and received in the corresponding path.

The memory 113 stores a program for controlling the overall operation of the portable terminal, temporary data generated during the operation of the portable terminal, system parameters, and other storage data.

2 is a block diagram of a public telephone network communication unit according to the present invention.

Referring to FIG. 2, the public telephone network communication unit 111 includes a selector 201, a Bluetooth module 203, a cordless telephony profile (CTP) gateway 205, and a public telephone network connection unit 207.

The selector 201 switches the Bluetooth module 203 and the CTP gateway 205 according to a selection for direct connection with the public telephone network or connection through an AP. For example, the selection is confirmed through a direct connection with the public telephone network or through a user's menu selection.

The Bluetooth module 203 transmits and receives a signal generated according to a voice call and a procedure for connecting with an AP for accessing the public telephone network.

The CTP gateway 205 converts transmission data generated according to a voice call into a signal suitable for the public telephone network, and also converts a signal received through the public telephone network into data. For example, the frequency band, data structure, signal format, and the like of the signal are converted.

The public telephone network connection unit 207 is directly connected to the public telephone network and outputs a signal provided from the CTP gateway 111 to the public telephone network, and outputs a signal received from the public telephone network to the CTP gateway 111.

3 illustrates a procedure for making a voice call through a public telephone network in a portable terminal according to an embodiment of the present invention.

Referring to FIG. 3, when the voice call is connected through the public telephone network, the controller 101 first checks whether the connection mode is the direct connection mode (301). In this case, the direct connection mode is confirmed through switching according to a public telephone network connection or menu selection of the portable terminal.

If not in the direct connection mode, the controller 101 proceeds to step 303 and performs a connection procedure with the AP for accessing the public telephone network, and then transmits data generated according to a voice call. For example, the connection and data transmission with the AP is performed using a Bluetooth function.

In contrast, in the direct connection mode, the controller 101 proceeds to step 305 to generate data according to a voice call. Here, the signal includes key input data (eg, dual tone multi frequency (DTMF) signal) according to telephone number input and PCM data according to voice.

In operation 307, the controller 101 converts the generated data into a signal conforming to a public telephone network standard.

After converting to the public telephone network signal, the controller 101 proceeds to step 309 and transmits the signal directly to the public telephone network.

Thereafter, the controller 101 ends this procedure.

The above-described embodiment has described a procedure for transmitting data in a voice call by directly connecting with a public telephone network in a portable terminal. On the other hand, when a voice signal is received through the public telephone network during a voice call by directly connecting with a public telephone network in the portable terminal, the received signal is converted into data through the reverse procedure of the transmission procedure.

The data according to the voice call is processed and transmitted by the above-described procedure in FIG. 3, and when a signal according to the voice call is received through the public telephone network, the received signal is converted into data in the reverse order of the transmission. Is handled by the procedure.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the portable terminal is provided with the CTP gateway to directly connect with the public telephone network so that the user can perform communication using the public telephone network even in a place where an AP is not installed.

Claims (8)

In the method for performing communication using a public switched telephone network (PSTN) in a portable terminal, When the transmission data is generated, converting the data into a signal conforming to the standard of the public telephone network for direct transmission through the public telephone network; Transmitting the signal directly to the public telephone network. The method of claim 1, And converting a signal received through the public telephone network into data. The method of claim 1, Confirming whether the data can be directly transmitted through the public telephone network; If the direct transmission is not possible, further comprising transmitting and receiving the data through the public telephone network through an access point (AP). The method of claim 1, Whether the direct transmission is possible, characterized in that whether the direct connection to the public telephone network or the user's menu selection. In a portable terminal device, A control unit controlling direct transmission and reception of data through the public telephone network when communicating using a public switched telephone network (PSTN); A Cordless Telephony Profile (CTP) gateway for mutual conversion between data provided according to the communication and a public telephone network signal; And a public telephone network connection unit for connecting the public telephone network with the CTP gateway. The method of claim 5, The controller checks whether direct data transmission and reception is possible through the public telephone network, and controls to directly transmit and receive data through the public telephone network. The method of claim 6, A selection unit for switching to connect with the public telephone network through an access point (AP) connected to the public telephone network when direct transmission and reception of data is not possible through the public telephone network; Further comprising a Bluetooth module for communicating with the AP, Device for transmitting and receiving data through the public telephone network via the AP using the Bluetooth module. The method of claim 5, And the public telephone network connection unit detects whether the public telephone network is connected and notifies the control unit.

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