KR20000051094A - Mobil telecommunication terminal having a city-phone function and a method of controlling there of - Google Patents

Abstract

PURPOSE: A method for controlling a roaming cellular phone terminal of a city phone function is provided to reduce communication costs by converting into a city phone mode, when calling over stopping a use for a roaming communication terminal mode. CONSTITUTION: A method for controlling a roaming cellular phone terminal of a city phone function, which includes antenna, a first circuit for a roaming mobile communication function, a second circuit for executing of the city phone, a switching circuit and a controller, comprises the steps of: deciding whether a user requests for a use of the city phone function, while executing the roaming communication function; if requests, controlling the switching circuit and making the second circuit connected to the antenna, with executing the city phone function, and if not, executing the roaming mobile communication function; deciding whether the user requests for ending of the city phone function; and if requests, making the first circuit connected to the antenna and executing the roaming mobile communication function, and if not, continuing on executing the city phone function.

Description

Roamable mobile communication terminal with Citiphone function and control method thereof {MOBIL TELECOMMUNICATION TERMINAL HAVING A CITY-PHONE FUNCTION AND A METHOD OF CONTROLLING THERE OF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to roamable portable communication terminals (currently 011 communication terminals, 016 to 019 PCS terminals), and more particularly to roamable portable communication terminals capable of performing a city phone function.

Currently, when determining whether the mobile communication service roamable can be divided into two. Roamable terminals include 011 communication terminals and 016 to 019PCS terminals, which are currently being used for commercial services, and CTI2 (CT-2) as roaming services. While the former has the advantage of being able to roam and making calls while on the move, the disadvantage is that the usage fee is high, and the latter has the advantage that the usage fee is very cheap like a public telephone instead of the disadvantage of not roaming. Mobile communication service users prefer roaming electronics because they want to receive services even when they are on the move. However, even in the case of electronic service users, when making a phone call, a lot of parts are often stopped and communicated, and in this case, a long time is communicated. In this case, the electronic terminal is used as a city phone function. As of yet, there is no known terminal for performing this function.

Accordingly, it is an object of the present invention to provide a PC or portable terminal for adding a city phone mode to a roamable mobile communication terminal so that a user can make a call in the city phone mode while the user is at a stop.

1 is a block diagram of a roamable mobile communication terminal capable of performing a Citiphone function according to the present invention.

2 is a flowchart illustrating a control method performed by the controller of FIG.

* Explanation of symbols for main parts of the drawings

100: switch 102: CDMA RF unit

104: CT2 RF unit 106: PCS function performing unit

108: control unit 110: CT2 function performing unit

114: Speaker 116: User interface

118: LCD and keys

The present invention for achieving the above object is to perform a roamable mobile communication function and a city phone function together, and transmits and receives radio waves with a base station corresponding to the roamable mobile communication function or a base station corresponding to the city phone function antenna; First means for performing the roamable mobile communication function; Second means for performing the city phone function; Switching means connected to the first means and the second means and connecting the first means or the second means to the antenna in response to a switch control signal; And controlling the performance of one of the roamable mobile communication function and the city phone function in response to a user's function selection, and when the roamable mobile communication function is used, the first means is connected to the antenna and the city phone And control means for generating the switch control signal to cause the second means to be connected to the antenna when using the function.

On the other hand, a method for controlling a city phone function in a roamable mobile communication terminal having the above-described configuration, comprising: first determining whether there is a demand for use of the city phone function by a user while performing the roamable mobile communication function; If there is no city phone use function request, the roamable mobile communication function is performed, and if there is a city phone use function request, the switching means is controlled so that the second means connects to the antenna and simultaneously the city phone function is performed. Performing; Determining whether there is a request to terminate the city phone function by a user; And if there is no request to terminate the city phone function, continuing to perform the city phone function, and if there is an end of the city phone function, allowing the first means to be connected to the antenna and performing the roamable mobile communication function. The control is in the form of inclusion.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a block diagram of a roamable mobile communication terminal capable of performing a city phone function according to the present invention. For convenience of description, the terminal of this figure has been described with reference to PCS and CT2 which are currently used the most. The PCS may be commonly applied to a terminal performing a 011 service as well as a PCS performing a 016 to 109 service. As shown in FIG. 1, a PCS capable of performing a city phone function according to the present invention is an antenna 98. And an output signal from the CDMA RF unit 102, which is an output signal for performing the PCS function, in response to the control signal provided from the control unit 108, the switch 100, the CDMA RF unit 102, and the CT2 RF unit. (104), PCS function execution unit 106, control unit 108, CT2 function execution unit 110, microphone 112, speaker 114, user interface 116 and LCD and keys 118 .

The antenna 98 transmits and receives radio waves with a base station corresponding to a roamable mobile communication function (PCS base station performing base station 016 to 019, 011 base station) or CT2 base station (base station installed in a general public telephone).

The CDMA RF unit 102 converts the high frequency received from the antenna 98 into a baseband signal and transmits it to the PCS function performing unit 106 or converts the baseband signal generated from the PCS function performing unit 106 into a high frequency. Transfer to antenna 98. In general, the RF unit employs a SUPER-HETERODYNE method. Since the CDMA RF unit is a conventional technology, detailed description thereof will be omitted.

The PCS function performing unit 106 is connected to the microphone 112 and the speaker 114 and performs a normal PCS function in response to a control signal of the controller.

On the other hand, the CT2 RF unit 104 converts the high frequency transmitted from the CT2 base station input through the switch 100 from the antenna 98 to a baseband signal and transmits it to the CT2 function performing unit 100 or the CT2 function performing unit. The baseband signal output from the 110 is converted into a high frequency and output to the switch 100.

The CT2 function performing unit 110 is connected to the microphone 112 and the speaker 114, and performs a normal CT2 function in response to a control signal of the controller 108.

On the other hand, the control unit 108 is connected to the PCS function execution unit 106, CT2 function execution unit 110 and the user interface 116, roamable move in response to the user's function selection via the LCD and key 118 Control the performance of one of the communication function and the city phone function. First, the switch control signal is generated so that the antenna is connected to the CDMA RF unit 102 when the roamable mobile communication function is used, and the antenna is connected to the CT2 RF unit 104 when the city phone function is used.

Hereinafter, the control performed by the controller 108 will be described in more detail with reference to FIG. 2. First, while performing the PCS function (S200), it is determined whether the user needs to use the city phone function through the user interface 116. It is determined (S202).

If there is no city phone use function request, the PCS function is performed, and if there is a city phone use function request, the switch 100 is controlled to connect the CT2 RF unit 104 and the antenna and perform a normal city phone function. (S204).

Thereafter, the user interface 116 determines whether there is a city phone function execution end request by the user (S206), and when there is no city phone function execution end request, the city phone function continues to be performed and there is a city phone function performance end request. In the case, the CDMA RF unit 102 is connected to the antenna and performs the PCS function (S208). Here, the end of the city phone function execution request may be determined as an END signal which is a city phone end signal.

As described above, when using a roamable mobile communication terminal having a city phone function according to the present invention, most of them use the current roamable communication terminal mode and then stop and make a call. Can be significantly reduced.

On the other hand, by being unaffected by the communication fee, it is possible to make a long time call and promote the use of a PC communication network or the Internet using mobile communication such as a notebook user.

In addition, by effectively using the city phone network constructed at a huge cost, it will not only prevent unnecessary waste of roaming terminals, but also improve the stability of wireless phones by securing another available channel at the user's entrance. There is also.

Claims (2)

By performing roamable mobile communication function and city phone function together, An antenna for transmitting and receiving a radio wave with a base station corresponding to the roamable mobile communication function or a radio wave with a base station corresponding to the city phone function; First means for performing the roamable mobile communication function; Second means for performing the city phone function; Switching means connected to the first means and the second means and connecting the first means or the second means to the antenna in response to a switch control signal; And Controlling the performance of one of the roamable mobile communication function and the city phone function in response to a user's function selection; and when the roamable mobile communication function is used, the first means is connected to the antenna and the city phone function And a control means for generating the switch control signal to cause the second means to be connected to the antenna when using a rotatable mobile communication terminal having a city phone function. An antenna for performing a roamable mobile communication function and a city phone function together, transmitting and receiving a radio wave with a base station corresponding to the roamable mobile communication function or a base station corresponding to the city phone function; First means for performing the roamable mobile communication function; Second means for performing the city phone function; Switching means connected to the first means and the second means and connecting the first means or the second means to the antenna in response to a switch control signal; And controlling the performance of one of the roamable mobile communication function and the city phone function in response to a user's function selection, and when the roamable mobile communication function is used, the first means is connected to the antenna and the city phone A method of performing the mobile communication function and the city phone function in a rotatable mobile communication terminal having a Citiphone function comprising control means for generating the switch control signal to cause the second means to be connected to the antenna when using the function. As Determining whether there is a request for use of the city phone function by the user while performing the roamable mobile communication function; If there is no city phone use function request, the roamable mobile communication function is performed, and if there is a city phone use function request, the switching means is controlled so that the second means connects to the antenna and simultaneously the city phone function is performed. Performing; Determining whether there is a request to terminate the city phone function by a user; And if there is no request to terminate the city phone function, continuing to perform the city phone function, and if there is an end of the city phone function, allowing the first means to be connected to the antenna and performing the roamable mobile communication function. A control method of a roamable mobile communication terminal having a city phone function comprising.