KR20080107891A - Portable device and method for setting of channel frequency thereof - Google Patents

Portable device and method for setting of channel frequency thereof Download PDF

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Publication number
KR20080107891A
KR20080107891A KR1020070056243A KR20070056243A KR20080107891A KR 20080107891 A KR20080107891 A KR 20080107891A KR 1020070056243 A KR1020070056243 A KR 1020070056243A KR 20070056243 A KR20070056243 A KR 20070056243A KR 20080107891 A KR20080107891 A KR 20080107891A
Authority
KR
South Korea
Prior art keywords
channel frequency
location information
information
dmb
digital broadcast
Prior art date
Application number
KR1020070056243A
Other languages
Korean (ko)
Inventor
백광준
Original Assignee
삼성전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR1020070056243A priority Critical patent/KR20080107891A/en
Publication of KR20080107891A publication Critical patent/KR20080107891A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/26—Arrangements for switching distribution systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/57—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for mobile receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/29—Arrangements for monitoring broadcast services or broadcast-related services
    • H04H60/32—Arrangements for monitoring conditions of receiving stations, e.g. malfunction or breakdown of receiving stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/49—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying locations
    • H04H60/51—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying locations of receiving stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/11—Aspects of broadcast communication characterised by the type of broadcast system digital multimedia broadcasting [DMB]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

The present invention relates to a mobile terminal and a method for setting a channel frequency thereof, the method comprising: detecting a position change of the mobile terminal while receiving a digital broadcast signal, retrieving a channel frequency assigned to the changed position; And tuning to receive the digital broadcast signal, and detecting the location change, comparing the currently received location information with existing location information, and if the location information does not match, And determining that the location of the terminal has been changed.

Description

Portable device and method for setting of channel frequency thereof

1 is a view schematically showing a mobile terminal according to an embodiment of the present invention;

2 is a view schematically showing a digital broadcast receiver according to an embodiment of the present invention;

3 is a view showing an example of a channel frequency table according to an embodiment of the present invention;

4 is a view showing a channel frequency setting method of a mobile terminal according to an embodiment of the present invention;

5 is an exemplary screen illustrating an example for setting a channel frequency in a mobile terminal according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal and a method for setting a channel frequency thereof, and more particularly to a portable terminal for setting a channel using location information and a method for setting a channel frequency thereof.

Digital Multimedia Broadcasting (DMB) is a new name for DAB (Digital Audio Broadcasting), commercially available in Europe and the United States as 'mobile TV'. Whereas DAB refers to audio-oriented digital radio broadcasting, DMB extends the concept of digital radio broadcasting to 'seeing and listening' multimedia broadcasting.

The DMB provides a broadcasting service by transmitting a broadcast signal transmitted from a satellite broadcasting center to a satellite to a digital broadcasting receiver. In other words, DMB can receive broadcast signals anywhere in the country because it can transmit broadcast signals using satellites, but since it is impossible to receive signals in underground, indoor and radio wave regions, it uses a repeater called a gap filler to retransmit signals. It is provided in the form.

In addition, the DMB provides a broadcast service by transmitting a broadcast signal transmitted from a satellite wave broadcasting center to a digital broadcast receiver at an assigned channel frequency. These DMB systems have different allocated frequency bands in different regions. Therefore, when the user watches DMB broadcast while moving, the user must set the broadcast channel to the channel frequency assigned to the moving area. That is, when the area is moved while receiving the DMB broadcast signal, the digital broadcast receiver scans the DMB broadcast channel to set the channel frequency of the area being moved. The digital broadcast receiver tunes to the found channel frequency according to the scan result and receives the broadcast signal.

For this reason, when a user moves a region while watching a DMB broadcast, inconvenience of resetting the scan channel is generated.

Therefore, the present invention was devised to solve the above-mentioned problems of the prior art, and an object of the present invention is to store channel frequencies allocated to regions and to tune to channel frequencies assigned to moving regions when moving during digital broadcast reception. The present invention provides a portable terminal and a channel frequency setting method thereof.

According to an aspect of the present invention, there is provided a method of detecting a location change of a mobile terminal during a digital broadcast signal, searching for a channel frequency assigned to the changed location, And tuning to the found channel frequency to receive the digital broadcast signal, wherein detecting the position change comprises: comparing the currently received position information with existing position information, and if the position information does not match. And determining that the location of the portable terminal has been changed.

An apparatus according to an embodiment of the present invention for achieving the above object, the radio frequency communication unit for receiving the location information of the portable terminal from the base station; A storage unit which stores channel frequency information allocated to the location information; A control unit for retrieving channel frequency information allocated to location information received through the radio frequency communication unit and transmitting the retrieved channel frequency information to a digital broadcasting receiver; And a digital broadcast receiver configured to receive the digital broadcast signal at the searched channel frequency under the control of the controller, wherein the controller compares the current position information of the portable terminal with previous position information and does not match the current position information. And searching for channel frequency information allocated to the location information.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, only the parts necessary for understanding the operation according to the embodiment of the present invention will be described, it should be noted that the description of other parts will be omitted so as not to distract from the gist of the present invention.

The terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, and the inventors are appropriate to the concept of terms in order to explain their invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

For example, the digital broadcasting center according to an exemplary embodiment of the present invention will be described with an example of transmitting a digital broadcasting signal to a mobile terminal by carrying a channel frequency. In addition, the location information of the mobile terminal will be described by taking an example of receiving from a wireless communication network.

In addition, the digital broadcasting according to an embodiment of the present invention will be described below using digital multimedia broadcasting (DMB) as an example, but is not limited thereto. That is, the digital broadcast according to the embodiment of the present invention may be a digital video broadcast (Handheld, DVB-H) and a media flow (MediaFLO).

In addition, examples of the wireless communication network according to an embodiment of the present invention, 2G (Global System for Mobile Communications) GSM (radio access) networks, 2.5G GSM and Code Division Multiple Access (CDMA) network 3G Universal Mobile Telephone System (UMTS) and Wideband Code Division Multiple Access (WCDMA) networks, other communication networks, and combinations of such networks. Since such networks are generally known, further description will be omitted here.

In addition, the portable terminal according to an embodiment of the present invention is a terminal capable of communicating using a wireless communication network, and includes an International Mobile Telecommunication 2000 (IMT-2000), a Time Division Multiple Access (TDMA), and a Global System for Mobile Communication (GSM). All communication terminals operating according to one or more applicable communication protocols corresponding to Code Division Multiple Access (CDMA), Universal Mobile Telecommunication Service (UMTS), Wideband Code Division Multiple Access (WCDMA), etc. Applicable to all information and communication devices such as portable multimedia player (PMP), MP3 player, digital broadcasting receiver, personal digital assistant (PDA) and smart phone, and applications thereof. something to do.

1 is a diagram schematically illustrating a portable terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a mobile terminal 100 according to an embodiment of the present invention includes a radio frequency (RF) communication unit 110, a data processor 120, and a digital broadcasting (DMB) receiver 130. ), An audio processor 140, an input unit 150, a display unit 160, a storage unit 170, and a controller 180.

The RF communication unit 110 forms a communication channel with the base station under the control of the control unit 170 to perform data communication and voice call. The RF communication unit 110 wirelessly transmits user data to another external mobile terminal using the communication channel. In particular, the RF communication unit 110 according to the present invention receives the location information from the base station using the communication channel. Here, the location information is location information of a predetermined region including the base station, and means information that can determine which region the mobile terminal 100 is located approximately. The RF communication unit 110 tunes to a channel frequency (Turning) to extract a signal on the channel frequency, a tuner, an RF transmitter for up-converting and amplifying the frequency of the transmitted signal, and a low-noise amplification and frequency of the received signal It may include an RF receiver for converting down.

The data processor 120 is responsible for processing voice data transmitted from the audio processor 130 and the like, numeric / text data input from a user, and data transmitted from the RF communication unit 110. The data processor 120 may include a transmitter configured to encode and modulate a signal transmitted through the RF communicator 110, and a receiver configured to demodulate and decode the received signal. That is, the data processor 120 includes a data codec for processing packet data and an audio codec for processing an audio signal such as voice.

As shown in FIG. 2, the DMB receiver 130 includes a DMB antenna 132, a broadcast receiver 134, and a broadcast processor 136. The DMB antenna 132 receives a DMB signal transmitted from a DMB broadcasting center. The DMB antenna 132 may be classified into a detachable antenna that may be mounted on one side of the mobile terminal 100 and an external antenna that may be inserted into the mobile terminal 100 and extend a length outside the mobile terminal 100. .

The broadcast receiver 134 includes a DMB tuner and a DMB demodulator. The DMB tuner tunes, or resonates, the channel frequency to the channel frequency under the control of the controller 180 to select and extract only the propagation. For example, if the user sets channel 10, the DMB tuner tunes to a frequency corresponding to the DMB broadcasting center and channel 10 and receives the DMB signal through the frequency. The DMB demodulator demodulates the DMB signal transmitted from the DMB tuner and converts the DMB signal into a DMB packet.

The broadcast processor 136 includes a DMB demultiplexer and a DMB decoder. The DMB demultiplexer extracts and separates broadcast data (Broadcast_data) and audio data (Audio_data) from the DMB packet delivered from the DMB demodulator. The DMB decoder decodes the broadcast data Broadcast_data and the audio data Audio_data extracted by the DMB demultiplexer. In addition, the DMB decoder delivers the broadcast data to the display unit 160 and delivers the audio data to the speaker of the audio processor 140.

The audio processor 140 reproduces the audio data output from the controller 180 and the audio data transmitted from the DMB receiver 130 or transmits audio data such as a voice input from a microphone (MIC) to the controller 180. Do this. That is, the audio processor 140 converts the voice / sound data into an audible sound through the speaker SPK under the control of the controller 180 and outputs the audible sound. In addition, the audio processor 130 outputs audio data such as a voice received from the microphone MIC.

The input unit 150 includes a plurality of input keys and function keys for receiving numeric or character information and setting various functions. The function keys may include direction keys, side keys, shortcut keys, and the like, which are set to perform a specific function. In addition, the input unit 150 transmits a key signal input in relation to the function control of the mobile terminal 100 to the controller 180. In particular, when the user inputs a key for requesting DMB broadcast reception, the input unit 150 generates a key signal corresponding to the input key and transmits it to the controller 180.

 The display unit 160 displays various menus of the portable terminal 100, user data input by the user, function setting information, or various information provided to the user. The display unit 160 may be formed of a liquid crystal display (LCD), and may be included in an input means when the LCD is formed in the form of a touch screen. In particular, the display unit 160 according to the present invention displays broadcast data (Broadcast_data) transmitted from the DMB receiver 130 when a user requests a DMB broadcast.

The storage unit 170 stores application data necessary for operating a function according to an embodiment of the present invention, user data generated by a user, and data transmitted / received during communication. In addition, the storage unit 170 may include one or more buffers for temporarily storing user data generated while executing a predetermined application program. The storage unit 170 may largely include a program area and a data area. In particular, the data region according to the present invention may store a channel frequency table including channel frequency information allocated to each region in each broadcasting station. Here, the broadcasting station may arrange a DMB broadcasting center in each region. These DMB broadcasting centers may transmit DMB signals to the mobile terminal 100 using channel frequencies assigned to respective regions.

For example, as shown in FIG. 3, the channel frequency table indicates that the channel frequencies of the N broadcasting stations are allocated to the frequencies f1 in the A region, f2 in the B region, and f3 in the C region. In addition, stations M in the channel frequency table are assigned frequencies f5 in region A, f6 in region B, and f7 in region C, while station S is assigned frequencies f10 in region A, f11 in region B, and f12 in region C. have. This data area activates the channel frequency table under the control of the controller 180.

The controller 180 controls the overall operation of the mobile terminal 100 and the signal flow between the internal blocks of the mobile terminal 100. In particular, when the location information of the mobile terminal 100 is changed while receiving the DMB broadcast, the controller 180 searches for the channel frequency allocated to the changed location information. In addition, the controller 180 tunes to the found channel frequency and continuously receives the DMB signal that was being viewed in the previous region.

For example, if it is determined that the location information transmitted from the base station, for example, a system information block (SIB) has been changed while receiving the DMB signal of the N broadcast station, the controller 180 may determine a channel frequency table stored in the storage unit 170. Search for channel frequency information assigned to the location information. That is, when the controller 180 receives the location information from the base station of the region A and receives the location information from the base station of the region B, the controller 180 searches for the channel frequency information allocated to the region B. When the controller 180 checks the channel frequency information allocated to the region B, the controller 180 tunes the DMB tuner to the region B channel frequency to continuously receive the DMB signal of the N broadcast station that is being received.

Meanwhile, FIG. 1 and FIG. 2 illustrate a block configuration required for describing an operation according to an exemplary embodiment of the present invention for convenience of description, but the present invention is not limited thereto. That is, the portable terminal 100 of the present invention may further include a camera and / or a portable (wireless) internet module, etc. according to the provision form thereof.

In the above, the configuration for setting the channel frequency in the mobile terminal 100 having the digital broadcast receiver according to an embodiment of the present invention has been described. Hereinafter, a channel frequency setting method of the mobile terminal 100 according to an embodiment of the present invention will be described with reference to FIG. 4.

4 is a flowchart illustrating a channel frequency setting method of the mobile terminal 100 according to an exemplary embodiment of the present invention.

Referring to FIG. 4, when a user requests DMB broadcast reception, the controller 180 detects this in step S101 and receives a DMB signal through the DMB receiver 130. If the location information transmitted from the base station is changed while receiving the DMB signal, the controller 180 detects this in step S102. That is, if the location information transmitted from the base station does not match the previous location information, the controller 180 detects that the location of the portable terminal 100 has been changed. For example, it is assumed that the mobile terminal 100 is located in the area A, receives the DMB signal from the N broadcast station, and receives the location information from the base station in the area A, as shown in FIG. When the mobile terminal 100 moves to a region where region A and region B overlap, the controller 180 also receives a signal from a base station of region B. Accordingly, the controller 180 measures RSSI (Received Signal Strength Indicator Received Field Strength) of signals transmitted from base stations in regions A and B to determine whether the strength of the signal transmitted from the base station in the region is greater (or reference strength). Exceed). If it is determined that the strength of the signal transmitted from the base station in the region B is greater, the controller 180 hands over to the base station in the region B. Thereafter, the controller 180 receives the location information from the base station of the region B.

The controller 180 searches for channel frequency information allocated to the changed position information in step S103. That is, the controller 180 searches for channel frequency information of the current position for continuously receiving the DMB signal received at the previous position. Here, the controller 180 can search for channel frequency information allocated to the corresponding position using the channel frequency table stored in the storage unit 170.

If the controller 180 searches for channel frequency information allocated to the corresponding position, the controller 180 tunes to the found channel frequency in step S104. In other words, when the controller 180 notifies the DMB receiver 130 of the found channel frequency, the DMB receiver 130 tunes the DMB tuner to the found channel frequency. The controller 180 receives a DMB signal through the DMB tuner in step S105.

That is, the mobile terminal 100 according to an embodiment of the present invention stores the channel frequency allocated to each region, and when moving while receiving the DMB signal, searches for the channel frequency assigned to the moving region and tunes to the channel frequency. The DMB signal may be continuously received.

As described above, in the detailed description of the present invention has been described with respect to specific embodiments, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below, but also by the equivalents of the claims.

As described above, the mobile terminal and its channel frequency setting method proposed by the present invention store channel frequencies allocated to regions, and thus, when moving while receiving digital broadcasts, the mobile terminal can tune more efficiently to channel frequencies allocated to moving regions. have.

Claims (7)

In the frequency setting method of a mobile terminal, Detecting a change in position of the mobile terminal while receiving a digital broadcast signal; Searching for channel frequencies assigned to the changed positions; And tuning the found channel frequency to receive the digital broadcast signal. The method of claim 1, The process of detecting the position change, Comparing the currently received location information with existing location information; And if the location information does not match, determining that the location of the portable terminal has been changed. The method of claim 2, The channel frequency search process, And searching for a channel frequency assigned to the current location information. The method of claim 1, And storing channel frequency information allocated for each location. In a mobile terminal, A radio frequency communication unit for receiving location information of the portable terminal from a base station; A storage unit which stores channel frequency information allocated to the location information; A control unit for retrieving channel frequency information allocated to location information received through the radio frequency communication unit and transmitting the retrieved channel frequency information to a digital broadcasting receiver; And And a digital broadcast receiver for receiving the digital broadcast signal at the found channel frequency under the control of the controller. The method of claim 5, wherein The control unit, And comparing the current position information of the portable terminal with previous position information and searching for channel frequency information allocated to the current position information. The method of claim 6, The digital broadcast receiver, And receiving the digital broadcast signal at a channel frequency assigned to the current location information.
KR1020070056243A 2007-06-08 2007-06-08 Portable device and method for setting of channel frequency thereof KR20080107891A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190131172A (en) * 2018-05-16 2019-11-26 현대자동차주식회사 Radio system and control method and vehilce including thereof
WO2021153810A1 (en) * 2020-01-29 2021-08-05 엘지전자 주식회사 Mobile terminal and control method of same mobile terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190131172A (en) * 2018-05-16 2019-11-26 현대자동차주식회사 Radio system and control method and vehilce including thereof
WO2021153810A1 (en) * 2020-01-29 2021-08-05 엘지전자 주식회사 Mobile terminal and control method of same mobile terminal

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