KR20020012414A - Method for automatically tunning radio frequency of mobile communication network - Google Patents

Abstract

PURPOSE: A method for converting radio frequency automatically in a mobile communication network is provided to continually listen broadcasting of a specific broadcasting station without special operation when a user listens a radio included in the mobile communication terminal during long-distance moving. CONSTITUTION: A control part receives radio broadcasting by controlling an FM receiver(510). The control part examines whether frequency conversion information is received from a base station(520). If receiving frequency conversion information, the control part examines whether broadcasting station information included in the received frequency conversion information equals to the broadcasting station of the current broadcasting(530). If equals, the control part performs tuning corresponding to local frequency information included in frequency conversion information for performing automatic frequency conversion(540).

Description

METHOOD FOR AUTOMATICALLY TUNNING RADIO FREQUENCY OF MOBILE COMMUNICATION NETWORK}

The present invention relates to a radio frequency conversion method in a mobile communication network, and more particularly, to a method for automatically converting a frequency of a mobile wireless terminal equipped with a radio receiver.

Currently, FM radio stations installed in our country use different frequency bands. In addition, because the same broadcasting station is broadcasting locally, different frequency bands are used in different regions. Accordingly, when traveling long distances on a highway or a train, if a user wants to listen to a broadcast of a specific station, the user has to search for a frequency every time he leaves the area. For example, if you want to continue to listen to a particular classic broadcast while moving on the highway, but the frequency changes after a while, the user must find and tune in to the music or announcer's voice or the frequency of the region you are listening to. However, the above method is cumbersome, and in particular, when the user is driving, it may cause traffic accidents by disturbing the concentration of driving.

Accordingly, an object of the present invention is to provide a method for allowing a user listening to a radio provided in a mobile wireless terminal to continuously listen to broadcast contents of a specific broadcasting station without any manipulation during long distance travel.

Another object of the present invention is to use a mobile communication network installed nationwide, when a mobile wireless terminal is located in the radio frequency conversion area, the base station transmits frequency information to the mobile wireless terminal and the mobile wireless terminal is the frequency The present invention provides a method for continuously listening to broadcast contents of a specific broadcasting station by automatically tuning frequencies according to information.

According to an aspect of the present invention, there is provided a method for automatically converting radio frequencies in a mobile communication network, the method comprising: storing information of base stations located in a boundary area of each local broadcasting station and corresponding frequency information for each type of broadcasting station; When entering the jurisdiction of the base station, transmitting information and frequency information of the corresponding broadcasting station to the specific mobile wireless terminal, and automatically tuning the radio frequency according to the corresponding broadcasting station and frequency information by the specific mobile wireless terminal. Characterized in that made.

In another aspect, the present invention provides a method for automatically tuning a frequency of a mobile wireless terminal having a radio receiver, the method comprising: checking whether a frequency conversion information including a type of a station and frequency information of a corresponding local station is received from a base station while receiving a radio broadcast; If the broadcasting station type information is the same as the type of the broadcasting station being listened to, characterized in that the step of automatically tuning the radio reception frequency according to the frequency information.

1 is a block diagram illustrating a concept of automatically converting an FM radio reception frequency according to an embodiment of the present invention.

2 is a diagram illustrating an example of a mobile communication network to which a method for automatically converting radio frequencies according to an embodiment of the present invention is applied.

3 is an example of configuration of a mobile wireless terminal equipped with an FM receiver according to an embodiment of the present invention.

4 is an example of configuration of an FM receiver according to an embodiment of the present invention.

5 is a flowchart illustrating a method for automatic frequency conversion of a mobile wireless terminal having an FM receiver in accordance with the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Specific details appear in the following description, which is provided to aid a more general understanding of the present invention, and it should be understood by those skilled in the art that the present invention may be practiced without these specific details. It will be self explanatory. In the following description of the present invention, if 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.

1 is a block diagram illustrating a concept of automatically converting an FM radio reception frequency according to an embodiment of the present invention.

When a user of a mobile wireless terminal equipped with an FM receiver moves from region A to region B, radio waves of the region A broadcast station are only heard as noise at a location where the radio waves of the region A broadcast station no longer reach. If the base station does not provide the frequency information of the local broadcaster B to the mobile terminal according to the present invention, the user may tune to the frequency corresponding to the local broadcaster B to hear the same broadcast.

For example, look at the frequency of each KBS radio by region as shown in Table 1 below.

Regional Station Names Frequency (MHz) Seoul Broadcasting Station 97.3 Daegu Broadcasting Station 101.3 Gwangju Broadcasting Station 90.5 Jeonju Broadcasting Station 96.9 Gunsan Broadcasting Station 96.9 Namwon Broadcasting Station 88.3 Daejeon Broadcasting Station 94.7 Chuncheon Broadcasting Station 99.5 Jeju Broadcasting Station 99.1 Ulsan Broadcasting Station 90.7 Changwon Broadcasting Station 91.7 Andong Broadcasting Station 92.1 Pohang Broadcasting Station 95.9 Yeosu Station 95.7 Suncheon Broadcasting Station 90.1 Chungju broadcasting station 90.9 Yeongwol Broadcasting Station 93.7 Taebaek Station 93.7 Sokcho Broadcasting Station 98.9

When the predetermined mobile wireless terminal registers a location or performs call reception / outgoing, etc., the MSC 230 uses a VLR (Electric Serial Number) or MIN (Mobile Identification Number) transmitted from the mobile wireless terminal as a search key. Search for a corresponding subscriber information database such as a currently registered subscriber number and a registered service. If the mobile communication terminal is currently registered in the VLR as a result of the search, authentication is established for the mobile wireless terminal. Otherwise, the MSC 230 temporarily stores the MIN in the VLR and then HLR 240. Inquiry about the mobile communication terminal. During this process, the mobile communication terminal provides a service in the same manner as that of the authentication.

The HLR 240 searches the subscriber database for the authentication request such as the location registration request from the mobile communication switching system. The HLR 240 notifies the MSC 230 when the unique number of the corresponding mobile wireless terminal is registered. In addition, the HLR 240 transmits the stored subscriber information (eg, phone number, ESN, registered service authority, etc.) to the MSC 230. Through this, the MSC 230 stores the temporary number of the temporarily stored mobile wireless terminal and the corresponding subscriber information database in the VLR 230. After that, the authentication of the mobile wireless terminal can be verified in the VLR 230. .

In addition, the HLR 240 stores information of base stations located in the boundary area of each local broadcasting station (Seoul area, Daejeon area, Chungju area, etc.) according to the type of broadcasting station (eg KBS1, SBS, etc.) according to an embodiment of the present invention. . The HLR 240 transmits the frequency conversion information to the MSC 230 when the mobile radio terminal subscribed to the automatic radio frequency conversion service according to the present invention is within the jurisdiction of the base station located in the boundary area.

That is, each mobile wireless terminal performs power-up registration with the connected base station every predetermined time when the power is turned on. As a result, the ESN, cell, sector, and location information of each of the mobile wireless terminals powered on in the specific cell area is stored in the VLR 240 via the BTS 210, the BSC 220, and the MSC 230. The HLR 240 manages information of a mobile wireless terminal that is powered on for each BSC and BTS. If the specific mobile wireless terminal 280 is within the jurisdiction of the base station located in the boundary area of each local broadcasting station for each broadcasting station, frequency conversion information is transmitted to the mobile wireless terminal via the MSC 230, the BSC 220, and the BTS 210. 280). The frequency conversion information includes broadcasting station information (e.g. KBS1), corresponding regional frequency information (e.g., Seoul regional frequency (97.3 MHz: first region frequency information), Daejeon regional frequency (94.7 MHz: second region frequency information) of the border region. ) Is included. In addition, the frequency conversion information may be transmitted through a paging channel.

3 illustrates an example of a configuration of a mobile wireless terminal equipped with an FM receiver according to an embodiment of the present invention.

The controller 310 controls the overall operation including the call processing function of the mobile wireless terminal. The memory 340 includes a ROM for storing an operating program, an electrically programmable EEPROM, a RAM, a flash memory, and the like. The memory 340 stores a program for controlling the automatic frequency conversion method according to the embodiment of the present invention. The memory 340 includes frequency information of each local broadcasting station for each broadcasting station type according to an embodiment of the present invention.

The display unit 320 is a display device such as a liquid crystal display (LCD) or a graphic screen. The display unit 320 displays the state of the mobile wireless terminal or the progress of the program under the control of the controller 310. The key input unit 330 includes a plurality of numeric keys and function keys for performing various functions, and outputs key input data to the controller 310 by external manipulation.

The RF unit 350 up-converts the signal input from the analog baseband unit 360 under the control of the control unit 310 and wirelessly outputs the signal to the base station (not shown) via the antenna 380. . In addition, the RF unit 350 down-converts the received signal received through the antenna 380 under the control of the controller 310 and outputs the analog signal to the analog baseband unit 360. The analog baseband unit 360 converts a signal input from the RF unit 350 into a baseband and digital signal and outputs the signal to the control unit 310. In addition, the analog baseband unit 360 outputs a signal output from the control unit 310 to the RF unit 350. The controller 310 performs channel demodulating and channel decoding operations on the digital signal output from the analog baseband unit 360. The controller 310 outputs the corresponding voice data to the signal processor 370. The signal processor 370 decompresses the voice data, converts the voice data into an audible voice signal, and outputs the same to the user through a speaker.

In addition, the signal processor 370 converts and compresses a user's voice signal output from the microphone into voice data and outputs the voice signal to the controller 310. The controller 310 performs operations such as channel coding and channel modulation on the voice data, and passes through the analog baseband unit 360, the RF unit 350, and the antenna 380. Wireless output to the base station.

The FM receiver 390 detects a specific carrier frequency of the received signal from the antenna 395 for the radio frequency signal according to the tuning control signal from the control unit 310 and performs a normal radio reception operation to listen to the sound of the corresponding broadcasting station. Hear it to the user through the speaker. The tuning control signal includes an FM_EN signal, an FM_PLL_DATA signal, and an FM_PLL_CLK signal. In addition, the FM receiver 390 outputs a carrier detect signal 397 indicating whether a signal of a selected frequency is normally received to the controller 310.

When the frequency conversion information is provided in the signal received from the base station, the controller 310 checks whether the broadcasting station information is the same as the type (eg, SBS) of the listening broadcasting station of the current FM receiver 390. If the broadcasting station information included in the frequency conversion information and the type of the listening broadcasting station are the same, the controller 310 transmits the corresponding tuning control signal 396 to the FM receiver 390 according to the local frequency information included in the frequency conversion information. Send. This causes the FM receiver 390 to automatically tune according to the local frequency information.

4 shows an example of a configuration of an FM receiver according to an embodiment of the present invention. Hereinafter, a description will be given with reference to FIG. 3.

The PLL controller 455 receives the tuning control signal 396 from the controller 310 of FIG. 3 and detects a received signal having a desired frequency. In addition, the PLL controller 455 outputs a carrier detect signal 397 to the controller 310 indicating whether a signal of the selected frequency is normally received. Meanwhile, the configuration of FIG. 4 is a configuration of a conventional FM receiver, and thus detailed operation thereof will be omitted.

5 is a flowchart illustrating a method for automatically converting a frequency of a mobile wireless terminal having an FM receiver according to the present invention. Hereinafter, a description will be given with reference to FIGS. 1 to 4.

In step 510, the controller 310 controls the FM receiver 390 to receive a radio broadcast. In operation 520, the controller 310 determines whether frequency conversion information is received from the base station. When the frequency conversion information is received, in step 530, the controller 310 checks whether the broadcasting station type information included in the received frequency conversion information is the same as the broadcasting station currently being listened to. If the broadcasting station type information is not the same as the broadcasting station currently being listened to, the controller 310 performs the control operation from step 510 again. If the broadcasting station type information is the same as the broadcasting station currently being listened to, in step 540, the controller 310 performs a tuning operation corresponding to local frequency information included in the frequency conversion information to perform automatic frequency conversion.

In operation 540, the controller 310 may sequentially perform tuning operations according to the first region frequency information and the second region frequency information included in the frequency conversion information. In addition, in step 540, when the reception sensitivity of the currently received local frequency, for example, the first local frequency, is not good, the controller 310 performs a tuning operation according to the second local frequency information included in the frequency conversion information. You can do

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 defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention has an advantage that a user who listens to a radio provided in a mobile wireless terminal can continuously listen to broadcast contents of a specific broadcasting station without any manipulation during long distance travel.

Claims (4)

In the radio frequency automatic conversion method of a mobile communication network, Storing information of base stations located in the boundary area of each local broadcasting station and corresponding frequency information for each type of broadcasting station, When a specific mobile wireless terminal enters the jurisdiction of the base station, transmitting information and frequency information of the corresponding broadcasting station to the specific mobile wireless terminal; And automatically tuning the radio frequency according to the corresponding broadcasting station and frequency information by the specific mobile radio terminal. In the frequency automatic tuning method of a mobile wireless terminal having a radio receiver, Checking whether, while receiving a radio broadcast, frequency conversion information including a type of a station and frequency information of a corresponding local station is received from a base station; If the broadcasting station type information is the same as the type of the broadcasting station currently being listened to, automatically tuning the radio reception frequency according to the frequency information. . The method of claim 2, wherein the step of tuning the radio reception frequency, And automatically tuning in accordance with the frequency information of the corresponding local broadcasting station. The method of claim 3, wherein the step of tuning the radio reception frequency, And automatically tuning according to frequency information of the corresponding local broadcasting station when the reception sensitivity of the currently received local frequency is not good.