KR20060085276A - Mobile phone of perception for another mobile phone by frequency and the method - Google Patents

Abstract

The present invention relates to a mobile communication terminal and a method for implementing the same by providing a frequency transceiver inside the mobile communication terminal so as to detect the mutual communication terminals, and more specifically, for each group of mobile communication terminals such as groups and friends. A mobile communication terminal of the same group can be found by setting the frequency of the same band. To this end, the present invention provides a frequency transmitter for generating a predetermined frequency and radiating it on the radio, a frequency receiver for detecting an output level of a received frequency by tuning / receiving a preset frequency, and an output level of the received frequency. An alarm unit for generating an alarm when an output of a predetermined threshold or more is provided. Therefore, according to the present invention, when a predetermined frequency is transmitted and received in a mobile communication terminal period, there is an effect of easily finding group members of the same group in an open external environment.

Mobile terminal, mobile phone, friend finder, frequency, FM, AM, location tracking, community

Description

MOBILE PHONE TERMINAL AND IMPLEMENTATION METHOD FOR SENSING OTHER PHONES USING A SPECIFIC FREQUENCY {MOBILE PHONE OF PERCEPTION FOR ANOTHER MOBILE PHONE BY FREQUENCY AND THE METHOD}             

1 is a diagram illustrating a state of sensing for each grouped mobile communication terminal according to the present invention.

Figure 2 is a block diagram showing the internal configuration of a mobile communication terminal according to the present invention.

3 is a flowchart illustrating a mutual sensing process in a master mobile communication terminal and a slave mobile communication terminal in accordance with the present invention.

4A, 4B, 4C, and 4D show respective frequency waveforms.

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

214: frequency selection unit 216: frequency transmission unit

218: frequency generation module 220: frequency transmission module

222: frequency receiver 224: tuning module

226: reception level measurement module 228: alarm unit

The present invention relates to a mobile communication terminal and a method for implementing the same by providing a frequency transceiver inside the mobile communication terminal so as to detect the mutual communication terminals, and more specifically, for each group of mobile communication terminals such as groups and friends. By setting the frequency of the same band, the present invention relates to a method for finding mobile communication terminals of the same group and a mobile communication terminal thereof.

Recently, due to the development of information and communication technology, the spread of small and portable mobile communication terminals such as PDAs or PCS has been rapidly spread, and now, personalized personal belongings have been made. As a result, each terminal producer or software developer is developing new add-on devices and models to the terminal in order to meet the needs of customers. In particular, the mobile communication technology is developing from the construction of a machine-centric environment, that is, a convenient user environment and a user interface environment, to the construction of an interface environment with a human-centered environment, that is, external environmental information (location, temperature, direction, sound, etc.). In particular, the development of various services based on location information is being actively performed.

However, conventional position detection technology and location information service are concentrated in a wide range of outdoor areas using GPS (Global Positioning System) or mobile phone network. Such technologies and services include indoor and outdoor areas such as museums, exhibition halls, and art galleries. In outdoor specific areas with a lot of obstacles, normal location information service could not be provided due to the difficulty of receiving satellite signal, increase of external noise, increase of multipath of mobile radio signal and increase of fading effect. In particular, when a GPS function is to be implemented in a terminal in order to implement a friend search function on a terminal to identify each other's position between fellowship members and friends in an external place, it is difficult to implement due to the high cost for implementing a GPS terminal. There was.

The present invention has been made to solve the above problems, an object of the present invention is to provide a mobile communication terminal having a frequency transmission and reception unit therein to recognize mobile communication terminals grouped with the same frequency. In addition, it is an object of the present invention to provide a method of generating an alarm when a specific terminal of a mobile communication terminal operates as a master to transmit a sensing frequency and also receives a specific signal from a neighboring slave terminal during the master operation.

In order to achieve the above object, the mobile communication terminal of the present invention includes: a frequency transmitter for generating a predetermined frequency and radiating it on the radio; a frequency receiver for tuning an output frequency of a preset frequency and sensing an output level of the received frequency; An alarm unit for generating an alarm when the output level of the received frequency is an output of a predetermined threshold or more. In addition, the process of sensing the mutual communication terminal, the process of the master mobile communication terminal to generate a predetermined detection frequency and radiate on the radio, and the slave mobile communication terminal receives the detection frequency to generate an alarm and the predetermined detection Generating a complete frequency and radiating the radio frequency; and generating a alarm by the master mobile communication terminal receiving the detected completion frequency.

DETAILED DESCRIPTION Hereinafter, detailed descriptions of preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the reference numerals to the components of the drawings it should be noted that the same reference numerals as possible even if displayed on different drawings. In addition, 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. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to general practices of those belonging to the technical field of the present invention, and the definitions should be made based on the contents throughout the present specification.

1 is a diagram illustrating a state in which mobile communication terminals transmit and receive the same frequency band and sense each other according to an embodiment of the present invention.

Referring to FIG. 1, the mobile communication terminals 112, 114, and 116 (master mobile communication terminal, first slave mobile communication terminal, and second slave mobile communication terminal) belonging to the first group 110 cross a 200 MHz frequency band, for example. When mutually set to be used as a sensing frequency for detecting a terminal, the master mobile communication terminal 112 generates a sensing frequency of 200 MHz with a predetermined output. When the first and second slave mobile communication terminals 114 and 116 having the 200-MHz frequency set as the sensing frequency detect the 200-MHz sensing frequency, an alarm indicating that the master mobile communication terminal 112 is present in the vicinity is generated. At the same time, the slave mobile communication terminals 114 and 116 generate a frequency having a slight increase or decrease difference (for example, 202 MHz or 198 MHz with a sensing frequency of 200 MHz and a 2 MHz difference) as a sensing completion frequency.

The detection completion frequency serves as a signal for the slave mobile communication terminals 114 and 116 to inform that their location is near the master mobile communication terminal 112. Accordingly, the master mobile communication terminal 112 that has received the detection completion frequency detects that there are slave mobile communication terminals 114 and 116 nearby and generates an alarm to inform the user. The alarm may be implemented in various ways, such as a specific ringtone, a pre-stored specific voice, vibration, lamp light, and the like.

Meanwhile, when the second group 120 is set to use 210 MHz and the third group 130 to use the 220 MHz frequency band as a sensing frequency, the master mobile communication terminals 122 and 132 and the slave mobile communication terminals of the respective groups ( 124, 126, 134, and 136 are set in advance to use 210 MHz and 220 MHz frequencies as sensing frequencies. The slave mobile communication terminals 124, 126; 134 and 136 detect the radiation emitted by the master mobile communication terminals 122 and 132 when approaching the grouping areas 120 and 130 of the master mobile communication terminals in proximity to the master mobile communication terminals 122 and 132. It detects the frequency and generates an alarm.

Accordingly, in order to implement the alarm, the master mobile communication terminals 112; 122; 132 and the slave mobile communication terminals 114, 116; 124, 126; 132, 136 respectively output a sensing frequency and a sensing completion frequency of a predetermined magnitude or more. However, if the detected frequency output size is larger than the required output, there is a problem such as overlapping in using frequency allocation such that the same frequency cannot be used in different regions due to the wider grouping range due to the high power. In addition, the master mobile communication terminal And a slave mobile communication terminal has a problem that can not achieve the object of the present invention because the mutual alarm occurs even at a far distance. Accordingly, when the master mobile communication terminal and the slave mobile communication terminal are close to a predetermined distance (for example, 10m distance), a detection frequency and a detection completion frequency are output so that an alarm can be generated.

Meanwhile, the sensing frequency of each group may be made by user selection in a preset frequency band. To this end, a mobile communication terminal manufacturer is allowed to use a terminal user's license to use a frequency band of an unused radio frequency band from a related authority. For example, if the 200MHz to 250MHz band is permitted to be used as the sensing frequency band, the mobile communication terminal provides a frequency transmitting and receiving means capable of outputting the frequency of the used band, and the users may use the sensing frequency in their group. The frequency to be used is selected and set between the allowed bands 200MHz to 250MHz. In FIG. 1, the first group 110 selects 200 MHz, the second group 120 selects 210 MHz, and the third group 130 selects 220 MHz.

2 is a block diagram illustrating an internal configuration of a mobile communication terminal having a frequency transceiver according to the present invention.                     

Referring to FIG. 2, the RF unit 202 performs a wireless communication function of the mobile communication terminal. The RF unit 202 includes an RF transmitter for upconverting and amplifying a frequency of a transmitted signal, and an RF receiver for low noise amplifying and downconverting a received signal. The data processor 204 includes a transmitter for encoding and modulating the transmitted signal, a receiver for demodulating and decoding the received signal, and the like. That is, the data processor 204 may be configured of a modem and a codec. The codec includes a data codec for processing packet data and an audio codec for processing an audio signal such as voice.

The audio processor 206 reproduces a received audio signal output from the audio codec of the data processor 204 through a speaker or transmits a transmission audio signal generated from a microphone to an audio codec of the data processor 204. Perform.

The memory 208 is composed of program memory and data memories. The program memory includes a booting and an OS for controlling a general operation of the mobile communication terminal, and the data memory stores a variety of data generated during the operation of the mobile communication terminal.

The key input unit / display unit 212 is a function unit in charge of a user interface (UI) with a user. The key input unit includes keys for inputting numeric and character information and function keys for setting various functions, and the display unit A liquid crystal device such as an LCD displays an image signal on a screen and displays user data output from the controller 124.

The controller 210 performs a function of controlling the overall operation of the mobile communication terminal. In particular, the controller 210 controls an algorithm for generating a predetermined sensing frequency and mutual sensing with other terminals.

The alarm unit 228 performs a function of notifying a user when a detection frequency or a detection completion frequency generated by another mobile communication terminal is detected. The alarm may be formed by various methods such as lamp light, sound, and vibration. Therefore, it will be apparent that the alarm unit 228 may be implemented by various alarm means such as an LED, a speaker, and a vibration motor.

In order to mutually detect terminals grouped with the same sensing frequency according to the present invention, each terminal includes a frequency selector 214, a frequency transmitter 216, and a frequency receiver 222. The frequency selector 214 is a function unit for setting a frequency band to be used as a sensing frequency, and the mobile communication terminals can sense each other between mobile communication terminals having the same sensing frequency through the set sensing frequency.

The frequency transmitter 216 and the frequency receiver 222 is a function unit for transmitting and receiving a sensing frequency for detecting the mutual communication terminal, the frequency transmitter 216 is a frequency generating module 216, the frequency transmitting module 220 The frequency receiver 222 includes a tuning module 224 and a reception level measuring module 226. The frequency generation module 216 is a module for generating a frequency selected by the frequency selector and performs a function of generating and amplifying the selected frequency. The frequency transmission module 220 is a module for transmitting the generated frequency, but may be implemented through the RF unit 202 in the actual implementation of the invention, but the frequency transmission module 220 is separately shown for clarity of description of the present invention.                     

The tuning module 224 is a function unit that detects by tuning a detection frequency (or detection completion frequency) preset by the frequency selector among various frequencies received, and implements the corresponding tuning module using a coil and a resistor. The sensing frequency (detection completion frequency) received at the tuning module 224 is measured at its output level at the reception level measuring module. If the measured reception level exceeds a predetermined threshold, the alarm unit 228 indicates that the master mobile communication terminal (or the slave mobile communication terminal, in case of receiving the detection completion frequency) is near. An alarm will be triggered. Therefore, the mobile communication terminal has a database as shown in Table 1 having a reception level for each distance from the mobile communication terminal that transmits a sensing frequency (or sensing completion frequency), and the access degree of the master mobile communication terminal (or slave mobile communication terminal). It can be seen. For example, if the slave mobile communication terminal is configured to generate an alarm when the master mobile communication terminal approaches 10m, the slave mobile communication terminal has an alarm when the reception level of the received detection frequency is 30db or more in Table 1 above. To be generated.

Receive Level [db] Distance from master mobile communication terminal [m] 10 db 1000 m 20 db 100 m 30 db 10 m 40 db 1m

Meanwhile, although the sensing frequency and the sensing completion frequency generated and radiated by the frequency generating module 216 may be fundamental harmonics, an FM modulated or AM modulated modulated signal may be used as another embodiment of the present invention. To this end, the frequency generation module should perform a master signal generation and a frequency modulation function in addition to generating the fundamental harmonics. Since the frequency modulation method is a conventionally known technique, a detailed description thereof will be omitted. However, when the present invention is implemented using a modulated signal other than the fundamental harmonic, such an implementation method will be briefly described with reference to FIGS. 4A, 4B, 4C, and 4D.

3 is a flowchart illustrating a mutual sensing process in a master mobile communication terminal and a slave mobile communication terminal according to the present invention.

First, when the user sets (S302, S304) frequencies (i.e., detection frequencies) used for mutual sensing in the master mobile communication terminal and the slave mobile communication terminal period, the master mobile communication terminal generates the selected detection frequency (S306) Radiating on the radio through the transmitter (S308). For example, if the frequency use band for mutual sensing is permitted from 200 MHz to 250 MHz, the master mobile communication terminal and the slave mobile communication terminal set a specific frequency band in this range as the sensing frequency for mutual sensing. If the 200MHz band is set as the sensing frequency (S302), the master mobile communication terminal generates a fundamental harmonic of 200MHz (S306) to radiate on the radio (S308).

The slave mobile communication terminal receives a corresponding frequency by synchronizing a preset sensing frequency band among a number of frequency bands (S310). After reception, the reception level is measured (S312), and it is determined whether the measured reception level is an output of a threshold value or more (S314). The threshold is an output reference value set to generate an alarm when the reception level is greater than or equal to a predetermined size. As shown in Table 1, the threshold value is used to determine whether the master mobile communication terminal and the slave mobile communication terminal are close to each other. When the output level exceeds the threshold value as a result of the reception level measurement, the master mobile communication terminal detects that it is near and generates an alarm (S316).

When the slave mobile communication terminal generates a sensed frequency at the same time as an alarm occurs and radiates it on the radio (S318), the master mobile communication terminal synchronizes and receives this frequency (S320) to detect that the slave mobile communication terminal is near. It is possible to generate an alarm (S322). The detection completion frequency is a signal indicating that the detection frequency emitted by the master mobile communication terminal is detected by the slave mobile communication terminal. For example, a detection frequency of 198 MHz or 202 MHz having a difference of 2 MHz at a detection frequency of 200 MHz as a detection completion frequency. The slave mobile communication terminal emits.

Meanwhile, in the above embodiment, the sensing frequency radiated from the master mobile communication terminal and the sensing completion frequency radiated from the slave mobile communication terminal are implemented as a standard high frequency without any modulation. As another embodiment of the present invention, the sensing frequency and the sensing complete frequency Can be implemented as a modulated signal. The modulated signal may be implemented in various ways. As an embodiment of the present invention, two modulation schemes, for example, Frequency Modulation (FM) and Amplitude Modulation (AM), are illustrated in FIGS. 4A, 4B, and 4C. This is briefly described with reference to FIG. 4D.                     

First, when a frequency (basic harmonic) set by user selection, for example, 200 MHz (FIG. 4A) is generated, the modulated signal is generated using the fundamental harmonic (FIG. 4A) as a carrier. For example, if the sine wave type low frequency (FIG. 4B) is used as the master detection signal, the modulation signal is modulated by amplitude modulation (AM modulation) or frequency modulation (FM modulation) so as to be carried on the fundamental harmonic (FIG. 4A), which is a carrier wave. To generate an AM signal (FIG. 4C) or an FM signal (FIG. 4D). The generated modulated signal (AM signal or FM signal) is radiated as a sensing frequency through the frequency transmitter of the master mobile communication terminal, and the slave mobile communication terminal detects the corresponding frequency band on the radio, demodulates it by wirelessly tuning it. Extract the sense signal from the master.

The slave mobile communication terminal checks the extracted detection signal of the master, generates an alarm informing the access of the master mobile communication terminal, and simultaneously transmits a detection completion signal (not shown) of a predetermined slave to a fundamental harmonic of 200 MHz, which is a carrier wave (Fig. AM-modulated or FM-modulated modulated signal (not shown) in 4a) is radiated as the sensed frequency. When the master mobile communication terminal confirms the slave signal by demodulating the detection completion frequency, which is a modulation signal, the master mobile communication terminal generates an alarm indicating the proximity of the slave mobile communication terminal.

In the above description of the present invention, a specific embodiment such as a mobile communication terminal has been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention is not to be determined by the embodiments described above, but will be apparent in the claims as well as equivalent scope.

As described above, the present invention has an effect of mutually detecting other terminals grouped with the same frequency by providing a specific frequency transceiver inside the mobile communication terminal. Therefore, there is an effect that can easily find a fellowship member or friends in an open external environment. In addition, there is an effect of improving the economics by enabling short-range location tracking by using a cheap frequency transmission and reception unit without having to implement the existing GPS system in the terminal.

Claims (14)

A frequency transmitter for generating a predetermined frequency and radiating it on the radio; A frequency receiver which detects an output level of a received frequency by tuning / receiving a preset frequency; An alarm unit that generates an alarm when the output level of the received frequency is an output of a predetermined threshold or more Mobile communication terminal having a. The mobile communication terminal of claim 1, wherein the mobile communication terminal further comprises a frequency selection unit for selecting a frequency band to be generated / emitted from a user within a predetermined range. The mobile communication terminal of claim 1, wherein the frequency is transmitted and received using fundamental harmonics. The mobile communication terminal of claim 1, wherein the frequency is transmitted and received using a modulated signal loaded by modulating a specific signal on a carrier of basic harmonics. The mobile communication terminal according to claim 4, wherein the modulated signal comprises amplitude modulation (AM modulation) or frequency modulation (FM modulation). The mobile terminal of claim 1, wherein the alarm is generated by using lamp light, sound, and vibration. The master mobile communication terminal generates a predetermined detection frequency and radiates it on the radio; A slave mobile communication terminal receiving the detection frequency to generate an alarm and generating a predetermined detection completion frequency to radiate on the radio; The master mobile communication terminal receiving the detection completion frequency and generating an alarm Mutual sensing method between mobile communication terminals having a. 8. The method of claim 7, wherein the sensed frequency and the sensed frequency are fundamental harmonics. The method of claim 8, wherein the sensing frequency is set by user selection among frequencies within a predetermined range. The method of claim 8, wherein the sensed frequency is set by increasing or decreasing a predetermined frequency value at the sensed frequency. 8. The method of claim 7, wherein the sensed frequency and the sensed frequency are modulated signals. 12. The method of claim 11, wherein the sensing frequency is a modulated signal carrying a master signal indicating that the transmission signal of the master mobile communication terminal is a fundamental harmonic set by user selection. 12. The method of claim 11, wherein the sensed frequency is a modulation signal including a slave signal indicating that the slave signal indicates a transmission signal of a slave mobile communication terminal to a fundamental harmonic set by a user selection. 14. A method according to any one of claims 11 to 13, wherein the modulated signal is amplitude modulation (AM modulation) or frequency modulation (FM modulation).

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