KR101953373B1 - Apparatus and method for automatic handover of terminal receiving broadcasting signal - Google Patents

Abstract

Disclosed are an apparatus and a method for automatic handover of a terminal receiving a broadcast signal. After determining the current position information of the terminal that receives the broadcast signal, the terminal and the plurality of stations with reference to the storage unit stores the frequency channel information of the plurality of broadcast base stations including the broadcast base station transmitting the broadcast signal and the position information of the plurality of broadcast base stations When the distance between the broadcast base stations is calculated and the distance between at least two broadcast base stations and the terminal among the plurality of broadcast base stations is the same, handover is performed to receive a broadcast signal from a neighboring broadcast base station transmitting the same broadcast signal as the broadcast signal being received. Perform.

Description

Apparatus and method for automatic handover of terminal receiving broadcast signal

The present invention relates to an apparatus and method for automatic handover of a terminal receiving a broadcast signal, and more particularly, to automatically receive a broadcast signal from an adjacent base station when a cell-to-cell movement of the terminal receiving the broadcast signal occurs. An apparatus and method for performing handover.

A mobile terrestrial digital multimedia broadcasting (DMB) receiver or an FM / AM radio receiver, or a terrestrial DMB service or FM / AM radio service in a mobile terminal provides different broadcasting programs for each frequency channel. In addition, the interval between the frequency band and the channel where the broadcast program is provided is set differently for each region.

For example, FM radio broadcasting is provided in the domestic range of 87.5 to 108.0 MHz, while in Japan is provided in the 76 ~ 90 MHz range. In addition, the channel spacing within the frequency range is set differently for each country and region, such as 100 KHz or 50 MHz. Furthermore, in Korea, the same broadcast program is provided through different frequency channels in different regions.

A broadcast program of the same broadcasting station transmitted from different base stations may be provided through two frequency channels in an area where cell edges of the base stations overlap each other. When a receiver receiving a broadcast program in a cell of a specific base station moves toward a cell periphery, reception sensitivity from the base station is lowered, and thus a manual hand is transmitted at an alternative frequency (AF) in which a neighboring base station transmits the broadcast program. By over, a broadcast program can be received continuously. In this case, manual handover is possible only when frequency channel information of each broadcast program of a neighboring base station is held.

An object of the present invention is to provide an apparatus and method capable of performing automatic handover according to the movement of a terminal in a terminal receiving digital and analog broadcasts.

An embodiment of the present invention for achieving the above technical problem, an automatic handover device of a terminal for receiving a broadcast signal, the broadcast receiving unit for receiving the broadcast signal; A storage unit for storing frequency channel information of a plurality of broadcast base stations including the broadcast base station transmitting the broadcast signal and location information of the plurality of broadcast base stations; A position determination unit determining current position information of the terminal; And calculating a distance between the terminal and the plurality of broadcast base stations, and transmitting the same broadcast signal as the received broadcast signal when the distance between at least two broadcast base stations and the terminal is the same among the plurality of broadcast base stations. And a control unit which performs a handover to receive the broadcast signal from a base station.

In accordance with another aspect of the present invention, there is provided an automatic handover method of a terminal receiving a broadcast signal, the method comprising: determining current location information of the terminal; Calculating a distance between the terminal and the plurality of broadcast base stations with reference to a storage unit in which frequency channel information of a plurality of broadcast base stations including the broadcast base station transmitting the broadcast signal and location information of the plurality of broadcast base stations are stored; Determining whether a distance between at least two broadcast base stations and the terminal is the same among the plurality of broadcast base stations; And performing a handover to receive the broadcast signal from an adjacent broadcast base station transmitting the same broadcast signal as the broadcast signal being received if the distance between the at least two broadcast base stations and the terminal is the same.

According to an embodiment of the present invention, an alternative frequency channel list is prepared for a broadcast base station adjacent to a mobile terminal, and a handover is automatically performed when the terminal is located at the same distance from the broadcast base stations to provide a seamless broadcast service. To receive it.

1 is a view schematically showing the configuration of a broadcasting system according to an embodiment of the present invention;
2 is a block diagram showing in more detail the configuration of a terminal according to an embodiment of the present invention;
3 is a diagram illustrating an initialization process according to an embodiment of the present invention;
4 is a diagram illustrating audible frequency channels for broadcasting stations by region;
5 is a diagram illustrating an automatic handover process according to an embodiment of the present invention;
6 is a diagram illustrating an embodiment in which a terminal moves between cells of a broadcast base station, and
7 is a diagram illustrating a configuration of broadcast information according to an embodiment of the present invention.

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 present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, and various equivalents may be substituted for them at the time of the present application. It should be understood that there may be water and variations.

In addition, in the embodiments of the present invention, a mobile terminal such as a tablet PC, a smartphone, and the like, which receives DMB and a radio signal, will be the main target, but the main subject of the present invention is a portable DMB receiver in which a similar technique is implemented. Other portable terminals, such as portable radios and on-vehicle broadcast receivers, can be applied with slight modifications without departing from the scope of the present invention, which can be determined by those skilled in the art. It will be possible.

1 is a diagram schematically showing the configuration of a broadcast system according to an embodiment of the present invention.

Referring to FIG. 1, a broadcast system according to an embodiment of the present invention may include a configuration of a broadcast station 300, broadcast base stations 200 and 240, and a terminal 100.

The broadcast system of the present invention having such a configuration supports the broadcast station 300 to generate a broadcast frame including a broadcast channel information and broadcast program information and transmit the generated broadcast information to the terminal 100. do. In this case, the broadcasting station 300 may be a DMB broadcasting station or a radio broadcasting station, and may transmit broadcasting information to the terminal 100 through the broadcasting base station 200.

Meanwhile, the terminal 100 receives broadcast information transmitted from the broadcasting station 300, checks broadcast channel information among the received broadcast information, extracts broadcast program information corresponding to the broadcast channel set by the user, and then extracts the broadcast. The program information may be output to the display unit and provided to the user.

The broadcasting station 300 produces programs related to various entertainments, entertainment, news, and living, or receives programs produced externally, converts them to meet the DMB or radio broadcasting standards, and then includes them in a transmission frame. To be transmitted to the broadcast base stations 200 and 240. Accordingly, the broadcasting station 300 may be configured to produce a program or may be configured to relay a program.

Basically, the broadcast station 300 includes broadcast program information in a transmission frame and transmits the broadcast program information to the broadcast base stations 200 and 240. In this process, broadcaster information, that is, broadcast channel information and broadcast, is broadcasted. Sync information for program information output is also transmitted. There may be several such broadcast stations 300 according to respective broadcasters, for example, KBS, MBC, SBS, YTN, QBS, U1, etc., and each broadcast station 300 may have various broadcast channels based on frequency bands assigned thereto. And a broadcast program corresponding to the generated broadcast channel may be generated and transmitted. The broadcast channel information may be channel information of a broadcast program serviced by each broadcaster, and may be information for viewing specific broadcast program information transmitted by a specific broadcast station 300.

The broadcast base station 200 receives a broadcast frame from the broadcast station 300, converts the broadcast signal into a broadcast signal that can be received by the terminal 100, and outputs it to the air. Since the size of the cell 220, which is an area that can be covered by one base station, is limited to a transmission capability or a region of the base station, the broadcast base station 200 has a plurality of broadcast base stations 200 and 240 at regular intervals. Can be installed.

The terminal 100 may activate a broadcast receiving means such as a DMB module or a radio module under the control of a user and receive a broadcast signal corresponding to broadcast information from the broadcast base station 200. The terminal 100 extracts broadcast information from the received broadcast signal, checks and extracts broadcast program information corresponding to channel information set by the user based on the broadcast channel information of the extracted broadcast information, and extracts the extracted broadcast program. The information may be output through the display unit and the audio processor.

Meanwhile, the terminal 100 may display, on the display unit, currently received broadcast program information and receivable frequency channel information on the basis of broadcast information transmitted by the broadcasting stations 300 and a pre-stored frequency channel list.

In particular, the terminal 100 according to an embodiment of the present invention obtains the current position information of the terminal 100, the terminal 100 is a cell of the broadcast base station 240 adjacent to the cell 220 of the specific broadcast base station 200 When moving toward 260, automatic handover is supported to continuously receive the broadcast program currently being received.

The configuration and operation of the terminal 100 will be described in more detail with reference to the accompanying drawings.

2 is a block diagram showing in more detail the configuration of the terminal 100 according to an embodiment of the present invention.

2, the terminal 100 according to an embodiment of the present invention is a wireless communication unit 110, input unit 120, audio processing unit 130, display unit 140, storage unit 150, position determination unit ( 160, the broadcast receiving unit 170, and the controller 180 may be included.

The terminal 100 of the present invention having the configuration as described above extracts broadcast information from the broadcast signal received through the broadcast receiving unit 170, and based on the synchronization information, broadcast channel information, and broadcast program information included in the broadcast information. The broadcast program information corresponding to the channel information set by the user is extracted.

The terminal 100 may output the video signal and the audio signal included in the extracted broadcast program information through the display unit 140 and the audio processor 130, respectively. In particular, the terminal 100 according to an embodiment of the present invention supports automatic handover based on the current position information of the terminal 100 input through the position determining unit 160. Hereinafter, each configuration of the terminal 100 according to an embodiment of the present invention will be described in detail.

The wireless communication unit 110 may control a signal related to cellular phone communication, short message service (SMS) or multimedia message service (MMS), video call communication, and data communication under the control of the controller 180. It is in charge of sending and receiving.

In addition, the wireless communication unit 110 converts and transmits voice / sound data and control data into a wireless signal, and receives and converts the wireless signal into voice / sound data and control data. To this end, the wireless communication unit 110 may include a transceiver for up-converting and amplifying a frequency of a transmitted signal, low-noise-amplifying and down-converting a received signal.

The wireless communication unit 110 is a configuration included when the terminal 100 supports the mobile communication function, and may be removed as necessary. That is, when the terminal 100 is configured for broadcast reception only, the configuration of the wireless communication unit 110 may be omitted.

The input unit 120 may include a plurality of input keys and function keys for receiving numeric or text 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 120 generates a key signal related to user setting and function control of the terminal 100 and transmits the key signal to the controller 180.

The input unit 120 may be implemented as a qwerty keypad including a plurality of keys, a 3 * 4 keypad, a 4 * 3 keypad, and the like. The input unit 120 transmits input signals generated when a user presses a specific key of the keypad to the controller 180. In this case, various input signals may be generated according to an application program being activated.

For example, the input unit 120 selects an input signal for activating the broadcast receiving unit 170, an input signal for instructing channel search, an input signal for searching a broadcast channel list, a specific broadcast channel, and broadcast program information accordingly. It may generate an input signal for watching the. Each input signal described above is transmitted to the controller 180, and a function according to the input signal may be performed under the control of the controller 180.

The audio processor 130 includes a speaker (SPK) for outputting audio data transmitted / received during a call, audio data generated when playing content stored in the storage 150, audio data received from a server through a web connection, and the like. A microphone (MIC) for collecting the user's voice or other audio signal.

In particular, the audio processor 130 according to an exemplary embodiment of the present invention may output an audio signal of broadcast program information received by activation of the broadcast receiver 170. The audio processor 130 may output a guide sound for guiding completion of channel search, a guide sound for guiding searched channel information, and the like according to the channel search instruction. The above-described guide sound output may be omitted depending on whether the user sets or supports the terminal 100.

The display unit 140 displays information input by the user or information provided to the user, including various menus of the terminal 100. That is, the display unit 140 may provide various screens according to the use of the terminal 100, for example, a standby screen, a menu screen, a message writing screen, a call screen, and the like.

In addition, the display unit 140 may be formed of a thin film transistor-based flat panel display device such as a liquid crystal display (LCD) and an organic light emitting diode (OLED). In addition, when a touch sensor is added to the front surface or at least one side of the display unit 140 to operate as a touch screen, the display unit 140 may function as the input unit 120. In this case, the display unit 140 may output an image including various menu maps, key maps, and the like for the function as the input unit 120. When the user touches the display unit 140 to indicate a specific part of the image, The sensor may detect this and transmit the corresponding location information to the controller 180.

The storage unit 150 includes an application program for operating a function according to an embodiment of the present invention, an application program for playing various stored files, and a key map for operating a touch screen when the display unit 140 is implemented as a touch screen. Or menu maps.

Here, the key map and the menu map may be in various forms. That is, the key map may be a keyboard map, a 3 * 4 key map, a qwerty key map, or the like, or may be a control key map for operation control of an currently activated application program. In addition, the menu map may be a menu map for controlling an application program currently being activated, or may be a menu map for supporting a broadcast reception function of the present invention. The storage unit 150 may largely include a program area and a data area.

The program area may include an operating system (OS) for booting the terminal 100 and operating the above-described components, an application program for reproducing various files, for example, a call function depending on whether the terminal 100 supports the function. It can store application programs for support, web browsers for accessing Internet servers, MP3 applications for playing other sound sources, image output applications for playing pictures, and video playback applications. In particular, the program area according to the embodiment of the present invention may store the broadcast operation program 151.

The broadcast operation program 151 is a routine for activating the broadcast receiver 170 based on the input signal for activating the broadcast receiver 170, and extracts broadcast information from the broadcast signal received by the broadcast receiver 170. A routine for selecting specific broadcast program information included in the broadcast information based on the channel information set by the user, the display unit 140 and the audio processor 130 for displaying the video signal and the audio signal included in the selected specific broadcast program information. Routines, and the like.

In particular, the broadcast operation program 151 according to the embodiment of the present invention may include an automatic handover support routine. In detail, the automatic handover support routine is under the control of the controller 180 and will initiate automatic handover based on the current position information input from the position determiner 160 when the terminal 100 moves. A subroutine for determining whether to determine whether to start automatic handover may include a subroutine for determining a frequency channel to be changed based on the information of the broadcast program currently being received.

The data area is an area in which data generated according to the use of the terminal 100 is stored, and may store various contents. In addition, the data area may store a user input input through the touch screen when the display unit 140 is implemented as a touch screen. The data area may record and store specific broadcast program information selected according to a user's request among broadcast information received from the DMB broadcasting station 300. In particular, the data area according to the embodiment of the present invention stores a frequency channel list for each region and broadcasting station required for automatic handover. The frequency channel and broadcasting station information currently being received from the stored frequency channel list may be output to the display unit 140 according to a user's request.

The controller 180 supports to perform an initialization process by controlling power supply to each component of the terminal 100, and after completion of the initialization process according to activation of the broadcast receiving unit 170, the automatic hand according to the present invention for each component Each signal flow can be controlled so that the over function can be supported. Hereinafter, the initialization and automatic handover process by the control of the controller 180 will be described in detail.

3 is a diagram illustrating an initialization process according to an embodiment of the present invention.

3, in step 310, the controller 180 scans a frequency band corresponding to an initially set broadcast service when the broadcast receiving unit 170 of the terminal 100 corresponding to the DMB receiving module or the radio receiving module is activated for the first time. PLL (Phase Locked Loop).

In this case, in order to identify the currently tuned frequency channel and another frequency channel that can be heard according to the current position of the terminal 100, the frequency channel list as shown in FIG. 4 may be stored in advance in the storage unit 150. The frequency channel list of FIG. 4 illustrates a frequency channel that can be listened to by broadcasting station for each region when the broadcast receiving unit 170 receives an FM radio broadcast.

The controller 180 controls the broadcast receiver 170 to scan the 87.5 to 108.0 MHz frequency band in which FM radio broadcasting is provided in Korea, and first receives a broadcast signal tuned to an 89.1 MHz frequency channel. Referring to the frequency channel list of Table 4, the 89.1 MHz frequency channel is used by KBS FM broadcasting station 411 in the metropolitan area, KBS FM broadcasting station 412 in Gangneung, and MBC FM broadcasting station 413 in Mokpo.

Next, the controller 180 checks the current position of the terminal 100 by controlling the position determiner 160 in step 320. The current location of the terminal 100 by the location determination unit 160 may be applied to various known methods such as receiving signals from neighboring base stations and access points (APs) or using a Global Positioning System (GPS) signal. Can be. In addition, the position determiner 160 may indicate the current position of the terminal 100 as latitude and longitude coordinates and output the coordinates to the controller 180.

When the frequency channel through which the current broadcast signal is received is 89.1 MHz, and the terminal 100 receives the input from the position determining unit 160 that the current terminal 100 is located in 'Suwon', as shown in Table 4, the currently received broadcast signal is in the metropolitan area. Is determined to be transmitted from the KBS FM broadcast station 411.

Next, in step 330, the controller 180 generates a channel list including other frequency channel information that can be received by the terminal 100 from the frequency channel list as shown in Table 4 below. Since the current terminal 100 is located in Suwon, that is, in the metropolitan area and the frequency channel receiving the broadcast signal is 89.1 MHz, the list of available channels includes KBS FM 421 in the metropolitan area, KBS1 FM 422 in the metropolitan area, and Chuncheon. MBC FM4U 423, MBC FM 424 in the metropolitan area, and the ROK military broadcast 425 in the metropolitan area may be included.

In operation 340, the controller 180 may provide visual information by displaying 'KBS FM metropolitan area', which is broadcasting station information, on which the current broadcast signal is received, on the display unit 140.

After the reception of the broadcast service through the broadcast receiver 170 is initialized as described above, when the user selects another frequency channel or inputs a frequency scan command through the input unit 120, the broadcast receiver 170 performs an operation according to a user input. Perform.

5 is a diagram illustrating an automatic handover procedure according to an embodiment of the present invention. The automatic handover procedure of FIG. 5 may be performed by the controller 180 when the terminal 100 moves. As a method of determining whether the terminal 100 moves, the position determining unit 160 may notify the controller 180 when the position information changes while the position determining unit 160 determines the position information of the terminal 100 at a predetermined period. 180 may determine the movement of the terminal 100 while receiving the coordinate information indicating the position of the terminal 100 from the position determination unit 160 at a predetermined cycle.

More specifically, in the automatic handover process of FIG. 5, after the movement of the terminal 100 is first detected, the movement speed of the terminal 100 is greater than or equal to a preset reference speed, for example, the terminal 100 is mounted in a vehicle. If present, it can be initiated by increasing it to 30 km / h or more.

After the automatic handover of FIG. 5 is started, in step 510, the controller 180 transmits to the adjacent broadcast base station based on the current location information of the terminal 100 received from the location determiner 160 and the location information of the pre-stored broadcast base station. Calculate the distance of. As a criterion for determining the neighboring broadcast base station, a broadcast base station having a linear distance from the terminal within a preset reference distance, for example, 200 Km, may be determined as the neighboring broadcast base station. In addition, the measurement period for calculating the distance to the adjacent broadcast base station may be set to vary depending on the moving speed of the terminal 100. In detail, when the moving speed of the terminal 100 increases, the measurement period may be shortened.

FIG. 6 is a diagram illustrating an embodiment in which the terminal 100 moves between cells of a broadcast base station. In the embodiment illustrated in FIG. 6, the terminal 100 is located in the coverage 620 of the broadcast base station B, and the broadcast base stations adjacent to the terminal 100 include the broadcast base stations A and C. The coverage 610 of the broadcast base station A, the coverage 620 of B, and the coverage 630 of C overlap each other.

In order for the controller 180 to calculate a distance from the terminal 100 to adjacent broadcast base stations A, B, and C, the storage unit 150 may store location information of all broadcast base stations in coordinate form. When the current coordinates of the terminal 100 are input from the position determiner 160, the controller 180 searches for information on the adjacent broadcast base station from the storage 150 based on the current coordinates of the terminal 100, The distance to the adjacent broadcast base station is calculated.

In the case of the embodiment shown in FIG. 6, the controller 180 calculates distances to base stations B and base stations C, which are adjacent broadcast base stations, including base station A, which is a broadcast base station where the current terminal 100 receives a broadcast signal, respectively. . The number of neighboring broadcast base stations for calculating the distance from the terminal 100 may be preset to two or more, including the broadcast base station currently receiving the broadcast signal by the terminal.

Referring back to FIG. 5, in step 520, the controller 180 determines whether the distance between the terminal 100 and the at least two broadcast base stations is the same. That is, in the case of the embodiment shown in FIG. 6, when the terminal moves from the coverage 620 of the broadcast base station B toward the coverage 610 of the broadcast base station A and is located at an intermediate point 650 between the two broadcast base stations, the control unit ( 180 determines that the distance between the terminal 100 and the two broadcasting base stations is the same.

Subsequently, in step 530, the controller 180 tunes PLL to an alternative frequency channel of the broadcast base station A, in which the current terminal 100 transmits the same broadcast signal as the broadcast signal received from the broadcast base station B, and replaces the broadcast base station A in step 540. The strength of the broadcast signal received through the frequency channel is compared with a preset reference intensity. If it is determined that the received signal strength of the alternative frequency channel is greater than the reference strength, the controller 180 hands over the terminal 100 from the broadcast base station B to the broadcast base station A in step 550.

For the automatic handover as described above, the alternate frequency channel list is stored in the storage unit 150 according to an embodiment of the present invention, and the alternate frequency channel list is controlled by the controller 180 after the movement of the terminal 100 starts. It may be generated and updated by the controller 180 in the process of calculating the distance between the 100 and the adjacent broadcast base station. In an embodiment as shown in FIG. 6, a terminal that receives a broadcast signal of a broadcast program provided by a KBS FM broadcast station through a broadcast base station B is directed from the coverage 620 of the broadcast base station B toward the coverage 610 of the broadcast base station A. When moving, the alternative frequency channel list may be configured as shown in Table 1 below.

ranking Broadcast base station information Station information One A KBS FM 2 C KBS FM

In the case of FIG. 6, since the terminal is approaching the broadcast base station A, the alternative frequency channel 1 priority is the frequency channel of the broadcast base station A that transmits the broadcast program of the KBS FM broadcast station currently being received by the terminal 100 as a broadcast signal, and 2 The rank is set to the frequency channel of the broadcast base station C adjacent to the broadcast base stations A and B.

The controller 180 may update the alternate frequency channel list as shown in Table 1 according to the change of the position of the terminal 100, and update the alternate frequency channel list even after performing the handover. Specifically, after handing over the terminal 100 from the broadcast base station B to the broadcast base station A, the controller 180 deletes the information of the broadcast base station A from the alternative frequency channel list of Table 1, and moves the terminal 100 in the moving direction. As a result, the rank of the alternative frequency channel is changed or the information of the new broadcast base station is added to update the alternative frequency channel list.

In the meantime, the controller 180 may notify the user of the automatic handover by displaying it on the display unit 140, and the user may confirm that the frequency channel has been changed through the display unit 140. In addition, the display unit 140 displays a GUI including menus and selection buttons for receiving various commands such as frequency channel selection from a user, and a menu indicating 'previous channel' when the user does not want to change the frequency channel. Can be selected.

When the user selects the 'previous channel' menu, the controller 180 controls the broadcast receiver 170 to tune to the previous frequency channel, that is, the frequency channel of the broadcast base station B, and then the received signal strength of the broadcast base station B is It can automatically hand over to the broadcast base station A when it is significantly lowered below the preset minimum intensity and can no longer guarantee signal quality.

In addition, the controller 180 may display the alternative frequency channel list on the display unit 140. In this case, when the user selects one of the alternative frequency channels, for example, broadcast base station C in Table 1, the controller 180 hands over to broadcast base station C instead of broadcast base station A, and reconfigures the alternative frequency channel list accordingly. can do.

7 is a diagram illustrating a configuration of broadcast information according to an embodiment of the present invention. The controller 180 may control an automatic handover process of the terminal 100 according to the content of the broadcast information configured as shown in FIG. 7.

Referring to FIG. 7, the display unit 140 displays broadcasting station information “KBS FM” and regional information “Andong” so that a user may know information of a broadcasting program currently being received. In addition, the position of the terminal 100 is represented by coordinate information, and the information on the frequency channel through which the current broadcast signal is received is also included in the broadcast information.

Next, among the signal states, “Locked” indicates a frequency channel that is currently receiving a broadcast, “Reachable” indicates a frequency channel that can be received, and “N / A” indicates other frequency channels. "Hide" indicates the channel set as unreceivable frequency channel by user setting, and "Unhide" indicates channel which is not. Values representing the signal state and the set state may be displayed together with the frequency channel information in the frequency channel list as shown in FIG.

Lastly, in FIG. 7, "neighborhood broadcast" shows the location of the base station to be handed over reflecting the user experience value based on the location of the current terminal 100.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

On the other hand, the present specification and the drawings have been described with respect to the preferred embodiments of the present invention, although specific terms are used, it is merely used in a general sense to easily explain the technical details of the present invention and help the understanding of the invention, It is not intended to limit the scope of the invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

Claims (18)

In the automatic handover apparatus of a terminal receiving a broadcast signal,
A broadcast receiver for receiving the broadcast signal;
A storage unit for storing frequency channel information of a plurality of broadcast base stations including the broadcast base station transmitting the broadcast signal and location information of the plurality of broadcast base stations;
A position determination unit determining current position information of the terminal; And
At least two distances between the terminal and the plurality of broadcast base stations are calculated based on current location information of the terminal, and among the plurality of broadcast base stations, the broadcast base station and neighboring broadcast base stations according to a moving direction of the terminal. And a controller for performing a handover to receive the broadcast signal from the adjacent broadcast base station transmitting the same broadcast signal as the broadcast signal if the distance between the broadcast base station and the terminal is the same. Device. The method of claim 1,
The controller determines the received signal strength of the broadcast signal received from the neighboring broadcast base station when the first distance between the terminal and the broadcast base station and the second distance between the terminal and the neighboring broadcast base station are the same, Automatic handover device, characterized in that for performing the handover if the received signal strength is greater than the predetermined reference strength. The method of claim 1,
And the controller calculates a distance between the terminal and the plurality of broadcast base stations in a preset measurement period when the moving speed of the terminal is equal to or greater than a preset reference speed. The method of claim 3, wherein
And the measurement period is set in inverse proportion to the moving speed of the terminal. The method of claim 3, wherein
The control unit calculates a distance between a plurality of broadcast base stations located within a preset reference distance from the terminal and the terminal, and includes information on the plurality of broadcast base stations based on the distances to the plurality of broadcast base stations. Automatic handover device, characterized in that for generating a frequency channel list. The method of claim 5,
The control unit updates the alternative frequency channel list for each measurement period, and updates the alternative frequency channel list after performing the handover. The method of claim 5,
A display unit displaying information of the plurality of broadcast base stations included in the alternative frequency channel list; And
And an input unit configured to receive a selection command of a broadcast base station to receive the broadcast signal.
The control unit performs a handover to the selected broadcast base station from the alternative frequency channel list. The method of claim 7, wherein
The control unit performs a handover to the neighboring broadcast base station, and if a move command to the previous broadcast base station that received the broadcast signal before performing the handover through the input unit is input, the broadcast signal from the previous broadcast base station. And handover to the adjacent broadcast base station when the strength of the broadcast signal from the previous broadcast base station is less than or equal to a preset minimum strength. In the automatic handover method of a terminal receiving a broadcast signal,
Determining current location information of the terminal;
Calculating a distance between the terminal and the plurality of broadcast base stations by referring to current location information of the terminal and location information of a plurality of broadcast base stations including a broadcast base station transmitting the broadcast signal;
Determining whether the distance between the at least two broadcast base stations including the adjacent broadcast base station according to the moving direction of the broadcast base station and the terminal and the terminal is the same among the plurality of broadcast base stations; And
If the distance between the at least two broadcast base station and the terminal is the same, performing a handover to receive the broadcast signal from a neighboring broadcast base station transmitting the same broadcast signal as the broadcast signal; Automatic handover method. The method of claim 9,
In the step of performing the handover, when the first distance between the terminal and the broadcast base station and the second distance between the terminal and the adjacent broadcast base station are the same, the received signal of the broadcast signal received from the neighboring broadcast base station Determining the strength and performing a handover if the received signal strength is greater than a preset reference strength. The method of claim 9,
In the calculating of the distance, if the moving speed of the terminal is greater than or equal to a predetermined reference speed, the automatic handover method, characterized in that for calculating the distance between the terminal and the plurality of broadcast base stations in a predetermined measurement period. The method of claim 11,
The measuring period is set to be inversely proportional to the moving speed of the terminal. The method of claim 11,
In the step of calculating the distance, the distance between the plurality of broadcast base stations and the terminal located within a preset reference distance from the terminal, the distance of the plurality of broadcast base stations based on the distance to the plurality of broadcast base stations Generating an alternative frequency channel list comprising information. The method of claim 13,
Calculating the distance, updating the substitute frequency channel list for each measurement period,
And in the performing of the handover, updating the alternative frequency channel list after performing the handover. The method of claim 13,
Displaying information on the plurality of broadcast base stations included in the alternative frequency channel list; And
Receiving a selection command of a broadcast base station to receive the broadcast signal; And
And performing a handover from the alternative frequency channel list to the selected broadcast base station. The method of claim 9,
Receiving a move command to a previous broadcast base station that received the broadcast signal after performing the handover to the neighboring broadcast base station and before performing the handover;
Controlling to receive the broadcast signal from the previous broadcast base station when the movement command is input; And
And performing a handover to the neighboring broadcast base station if the strength of the broadcast signal from the previous broadcast base station is less than or equal to a predetermined minimum strength. The method of claim 1,
And a measurement period for calculating a distance between the terminal and the plurality of broadcast base stations is set to vary according to a moving speed of the terminal. The method of claim 9,
And a measurement period for calculating a distance between the terminal and the plurality of broadcast base stations is set to vary according to the moving speed of the terminal.

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