KR101378783B1 - Apparatus and method for providing matching handover of broadcasting service in mobile digital multimedia broadcasting, and computer-readable record medium with broadcasting service matching handover program for the same - Google Patents

Abstract

In the mobile digital broadcasting service environment, when a receiving terminal leaves a receiving area of a service channel currently being serviced, the present invention precisely matches broadcasting data between an existing broadcasting service in an existing region and a broadcasting service in a newly entered region. By providing a handover of the service, even if there is a departure event of the service area, the broadcast service matching handover technology is provided so that the user can enjoy the broadcasting service without interruption.

Description

Apparatus and method for providing a matched handover of a broadcast service in a mobile digital broadcasting environment, and a computer-readable recording medium for recording a broadcast service matched handover program therefor MULTIMEDIA BROADCASTING, AND COMPUTER-READABLE RECORD MEDIUM WITH BROADCASTING SERVICE MATCHING HANDOVER PROGRAM FOR THE SAME}

In the mobile digital broadcasting service environment, when a receiving terminal leaves a receiving area of a service channel currently being serviced, the present invention precisely matches broadcasting data between an existing broadcasting service in an existing region and a broadcasting service in a newly entered region. By providing a handover of the service, even if there is a departure event of the service area, the broadcast service matching handover technology is provided so that the user can enjoy the broadcasting service without interruption.

In general, the broadcasting service started from broadcasting for transmitting and receiving analog television or analog radio signals and has now reached the stage of providing digital broadcasting service. These digital broadcasting services include terrestrial digital multimedia broadcasting (T-DMB), which is used for mobile phones or vehicles, as well as television, China Mobile Multimedia Broadcasting, a mobile mobile broadcasting service developed by China, and terrestrial broadcasting in Japan. ISDB-T, the DMB standard, and Digital Video Broadcasting-Terrestrial (DVB-T), the European digital broadcasting standard, are being developed in various ways around the world.

Such digital broadcasting services are premised on mobility, such as terrestrial digital multimedia broadcasting (T-DMB). In such a mobile digital broadcasting service, a user can always receive a broadcast anytime and anywhere with a receiving terminal for viewing or listening to a mobile phone or terrestrial digital broadcasting.

However, in terrestrial digital multimedia broadcasting, channel setting or broadcasting service setting is individually defined for each region (region), and thus, when the receiving terminal leaves the service region for each channel while moving, the corresponding service cannot be continuously received. That is, in the case of leaving the service area of the current broadcast service, the receiving terminal generally does not detect the departure of the service area and continuously tries to reproduce only the channel of the selected frequency.

On the other hand, conventionally, when a terminal receiving a digital broadcast leaves the service area of the broadcast service, the receiving terminal detects this and searches for adjacent channels by itself. When searching for an adjacent channel as described above, the terminal is configured to receive the first searched channel among the signals of the searched adjacent channel. That is, it does not consider what channel the user currently selects and receives. Therefore, when the user moves out of the service area to another service area through various means such as a car or a bus, the user first receives a broadcast service set by the terminal.

Therefore, the user is not provided with the same service as the broadcast service he is watching or listening to, and the inconvenience of having to search the entire channel whenever the user leaves the service area and select the desired channel among the searched channels. If the user is driving a car, the problem may be a risk that may cause an accident.

An object of the present invention is to precisely match broadcast data between an existing broadcast service in an existing area and a broadcast service in a newly entered area when a receiving terminal leaves a receiving area of a service channel currently being serviced in a mobile digital broadcasting service environment. By providing a handover of the broadcast service while providing an exit event of the service area, the user is to provide a broadcast service matching handover technology that allows the user to enjoy the broadcast service without interruption.

An apparatus according to the present invention for achieving the above object is a tuning unit 210 having a main tuner for receiving a digital broadcast signal of the current service area and a sub-tuner for receiving a digital broadcast signal of an adjacent area in a mobile digital broadcast environment A storage unit 252 having a first database for storing channel / service information for digital broadcasting for each region in order to provide a matched handover of a broadcasting service in response to a local movement of a receiving terminal having a preamble; A position detector 253 for estimating position information of a receiving terminal; Stores broadcast data of a digital broadcast signal provided from the main tuner of the tuning unit 210 (hereinafter referred to as 'main service') and a digital broadcast signal provided from a sub tuner of the tuning unit 210 (hereinafter referred to as 'twin service'). A buffer unit 220; A matching unit 231 which provides matching determination information of the broadcast data of the main service and the twin service stored in the buffer unit 220 and provides switching for the main service and the twin service; Adjacent region of the receiving terminal, the twin service, which is the same broadcast service as the main service received by the main tuner, based on the channel / service information obtained from the first database of the storage unit 252 and the location information provided from the location detector 253. And the tuning unit 210 controls the sub-tuner to receive the identified twin service, and receives the matching determination information from the matching unit 231 so that the matching is performed between the main service and the twin service 220. ) And a handover control unit 240 for controlling the matching unit 231 to switch the main service and the twin service when the service terminal departure of the receiving terminal is detected.

In this case, the matching unit 231 provides information on timing deviation between the main service and the twin service as matching determination information, and the handover control unit 240 corresponds to the timing deviation information provided from the matching unit 231. In step 220, it is preferable to control the movement of the buffer pointer for the twin service. In particular, when the matching unit 231 determines that matching between the main service and the twin service is impossible due to the possibility of a buffer overflow and a buffer underflow, the timing deviation information may be limited to the extent that the buffer overflow and the buffer underflow do not occur. It is preferable to generate.

In addition, the location detecting unit 253 provides the location information of the current terminal service area and the entry expected area according to the moving direction of the receiving terminal, the handover control unit 240 is a location detection unit 253 to provide a twin service for the main service of the main tuner It is desirable to identify in the expected entry area provided by). In addition, the storage unit 252 further includes a second database that stores a mapping table for the same broadcast service for each region for digital broadcasting, and the handover control unit 240 further bases the second database on identifying the twin service. It is desirable to.

In order to achieve the above object, a method according to the present invention provides a matched handover of a broadcast service in response to local movement of a receiving terminal having a main tuner and a sub tuner in a mobile digital broadcasting environment. A first step of setting up a database for storing service information per region; Controlling a main tuner of a receiving terminal to receive a broadcast service (hereinafter, referred to as a “main service”) from a current service area; Estimating location information for the receiving terminal; A fourth step of identifying a broadcast service (hereinafter, 'twin service') identical to the main service in an adjacent area of the receiving terminal based on channel / service information obtained from a database and the estimated location information; Controlling a subtuner to receive the identified twin service; Determining whether or not the broadcast data of the main service and the twin service are matched and generating matching determination information as a result; A seventh step of controlling a buffer of the twin service so that matching between the main service and the twin service is made based on the matching determination information; And an eighth step of switching the main service and the twin service when the departure of the service area of the receiving terminal is detected.

In this case, the matching determination information of the sixth step is configured to include information on the timing deviation between the main service and the twin service, and the buffer control of the seventh step moves the buffer pointer for the twin service to correspond to the timing deviation information. It is preferable. In particular, the sixth step is to generate timing deviation information in the case that the buffer overflow and the buffer underflow do not occur when it is determined that matching between the main service and the twin service is impossible due to the possibility of buffer overflow and buffer underflow. It is desirable to. In addition, the third step is to provide the estimated location of the entry according to the current location and the moving direction of the receiving terminal as location information, and the fourth step is to identify the twin service for the main service in the expected entry area provided in the third step. desirable.

According to the present invention, a service area departure and a new entry event are provided by providing a precisely matched broadcast service handover while moving across multiple areas by vehicle in a mobile digital broadcasting environment (eg, TDMB, CMMB, ISDB-T, DVB-T). Despite the fact that the user continues to enjoy the broadcasting service that the user can enjoy without interruption, while improving the user's convenience, there is an advantage that can expand the service area of the mobile digital broadcasting.

1 is an exemplary diagram of a terrestrial digital broadcasting system for explaining the present invention.
2 is a functional internal block diagram of a terminal for receiving a digital broadcast signal according to the present invention.
FIG. 3 is a diagram summarizing available content information of terrestrial DMB services in two different regions (regions A and B). FIG.
4 is a flowchart schematically illustrating a matched handover process for mobile digital broadcasting according to the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to the accompanying drawings. It should be noted that the drawings of the present invention attached hereto are provided for the purpose of helping understanding of the present invention, and the present invention is not limited to the shape or the arrangement exemplified in the drawings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: FIG.

1 is an exemplary diagram of a terrestrial digital broadcasting system for explaining the present invention.

First, the digital broadcasting providing server 10 is an apparatus for providing a terrestrial digital broadcasting service. The digital broadcasting providing server 10 may be implemented as a single server or a plurality of servers. For example, a server for transmitting a KBS broadcast and a server for transmitting an MBC broadcast may be separately provided, or a single broadcast server may manage all of them. In addition, a server for transmitting individual broadcasts (eg, KBS, MBC) may also be composed of several server devices.

In addition, depending on the region, the digital broadcasting providing server 10 may operate different servers even from the same broadcaster, and may manage the entire region collectively in one digital broadcasting providing server 10. For example, a server providing the KBS broadcasting service covering Seoul and Gyeonggi area and a server providing the KBS broadcasting service covering the Daejeon / Chungcheong area may be different servers, or a single server may cover an entire broadcast. It can also be managed.

In the present invention, all the broadcasts are shown as being provided through one digital broadcast providing server 10 for convenience of description. However, the digital broadcast providing server 10 may be configured to have a larger number of broadcast servers according to the region or the number of broadcasters. As described above, specific matters related to the number of broadcast servers are related to the design of a system for providing terrestrial digital services, and thus, the present invention will not limit these matters.

 The first broadcast network 20 and the second broadcast network 30 represent a network for delivering contents of a broadcast service according to a region. For example, if the first broadcast network 20 is one network for covering Seoul and Gyeonggi, South Korea, the second broadcast network 30 is one network for covering Daejeon and Chungcheong, Korea.

Accordingly, a plurality of base stations for providing respective broadcast service contents may exist below the first broadcast network 20. In FIG. 1, the first digital broadcast transmitter 40 is set as one of them. In addition, a plurality of base stations for providing respective broadcast service contents may exist below the second broadcast network 30. In FIG. 1, the second digital broadcast transmitter 50 is set as one of them. Let's do it.

As described above, the first digital broadcast transmitter 40 and the second digital broadcast transmitter 50 are base stations or related equipment for transmitting broadcast service contents covering different regions as described above.

It is assumed that the digital broadcasting reception terminal 100 for receiving digital broadcasting in such a digital broadcasting environment receives digital broadcasting service contents in the region of the first digital broadcasting transmitter 40. In this case, the digital broadcast receiving terminal 100 may be provided with a service searched for in its desired area. For example, assuming that the first digital broadcast transmitter 40 is a digital broadcast transmitter covering Seoul and Gyeonggi, which are the metropolitan areas of the Republic of Korea, the digital broadcast receiving terminal 100 is the type of broadcast service content as shown in FIG. Can be received.

FIG. 3 shows channel information and service information on broadcast service contents that can be received in area A (Seoul / Gyeonggi area) and area B (Daejeon / Chungcheong area) of the Republic of Korea. The frequency band of the corresponding service, a service label (Serv Label), a service ID (Service ID), a subchannel ID (Shbch ID), a service type (Serv Type), and a bit rate are shown together. In contrast to Zone A and Zone B, for example, the YTN service is serviced with a service label of 'YTN' in the frequency band of 183.008 MHz in Seoul and Gyeonggi, but in the Daejeon / Chungcheong area 'CJB-m' in the frequency band of 202.736 MHz. YTN 'service label.

It is assumed that the digital broadcasting reception terminal 100 is included in the region of the first digital broadcasting transmitter 40 to listen to one of the services shown in FIG. 2, for example, YTN broadcasting service contents of the service label. . At this time, when the digital broadcasting reception terminal 100 moves geographically and enters the region of the second digital broadcasting transmitter 50, as shown in FIG. 1, broadcast contents provided from different regions are different from each other. Different frequencies may be used.

Accordingly, the receiving terminal 100 according to the prior art, for example, watches the YTN service and then moves out of the region (Seoul and Gyeonggi) of the first digital broadcasting transmitter 40 to the region of the second digital broadcasting transmitter 50 (Daejeon / Chungcheong). In the case of entering, it does not receive a broadcast service at all, or receives a signal of MBC11 FM, which is the nearest channel (199.280 MHz), as shown in FIG. In particular, while leaving the service area and entering a new entry temporarily, the display screen of the receiving terminal does not come out temporarily, and newly received broadcast contents are set to be different from those previously viewed.

However, the digital broadcasting reception terminal 100 according to the present invention includes two or more tuners so as to correspond appropriately even when moving a service area (area A to area B), and compares them based on information input from each tuner. If the same broadcast service exists in both areas by analyzing, it is controlled to link with the corresponding broadcast service naturally. In particular, the present invention recognizes that a user continuously receives a seamless broadcast service by providing matching control in such a case.

A more detailed description thereof will be further described with reference to FIGS. 2 and 4.

2 is a functional internal block diagram of a terminal for receiving a digital broadcast signal according to an embodiment of the present invention.

The tuning unit 210 according to the present invention basically receives a broadcast service content through an antenna ANT, converts it into a baseband signal, and outputs it to the buffer unit 220. In the present invention, the tuning unit 210 includes two tuners, that is, the first tuner 211 and the second tuner 212. The tuning unit 210 is controlled by the handover control unit 240. Also, the tuning units 210 may all use the same antenna ANT, or may use different antennas ANT. In the embodiment of the present invention, a case of using the same antenna ANT is illustrated.

In the present invention, the tuning unit 210 includes a first tuner 211 and a second tuner 212, which is used as a main tuner and a sub tuner. The main tuner is a component for receiving a digital broadcast signal of a service area to which the receiving terminal 100 currently belongs, and the subtuner is a component for receiving a digital broadcast signal in a service area in the vicinity of the current service area. The first tuner 211 and the second tuner 212 may be configured to play the roles of the main tuner and the sub tuner fixedly, or may alternately play the roles of the main tuner and the sub tuner. In the detailed description of the present invention, it is assumed that the first tuner 211 plays the role of the main tuner and the second tuner 212 plays the role of the subtuner for convenience of description.

Accordingly, the first tuner 211 receives the signal of the broadcast service content in the current service area and converts it into a baseband signal, and the second tuner 212 detects the movement to an area other than the current broadcast service area. Search for frequency bands for adjacent neighboring service areas. For example, if the current location is located in the Seoul / Gyeonggi area, the second tuner 212 performs a signal reception for the service area depending on whether it moves to the adjacent service area, Daejeon / Chungcheong or Gangwon area. . That is, the controller detects the strength of a signal outside the region, receives the detected signal, and converts the signal into a baseband signal.

Referring to FIG. 3, in the region A, the YTN broadcasting service is serviced by an ensemble label of 'YTN DMB' and a service label of 'YTN' in the frequency band of 183.008 MHz. On the other hand, in area B, a broadcasting service provided with an ensemble label of 'TBJ u' and a service label of 'CJB-m YTN' is found in a frequency band of 202.736 MHz. The broadcasting service of 'CJB-m YTN' of area B is It is determined that the content is the same as the 'YTN' broadcasting service in the area A. Assuming that the user is currently watching the 'YTN' broadcast service in the area A, the first tuner 211 is receiving the 'YTN' broadcast service, which is referred to herein as the 'main service'. In addition, the second tuner 212 receives a 'CJB-m YTN' broadcast service for the area B, which is referred to as a twin service in the present specification.

The buffer unit 220 is a component for temporarily storing the data of the digital broadcast signal provided by the tuning unit 210. The buffer unit 220 corresponds to the first tuner 211 and the second tuner 212 of the tuning unit 210. The first buffer 221 and the second buffer 222 are provided. The first buffer 221 temporarily stores the digital broadcast signal for the main service received by the first tuner 211, and the second buffer 222 stores the digital broadcast for the twin service received by the second tuner 212. Temporarily store the signal.

The matching unit 231 determines whether the digital broadcast signal data received from the first buffer 221 and the second buffer 222 can be matched. In the present invention, the first tuner 211 (ie, main tuner) receives the main service in order to provide a matched handover in response to regional movement, while the second tuner 212 (ie, sub-tuner) receives the adjacent area. Receive twin services for. The matching unit 231 compares the broadcasting data of the main service delivered from the first buffer 221 and the broadcasting data of the twin service delivered from the second buffer 222 to determine whether matching is possible.

Even for the same content, there is a time difference between the main service and the twin service for various reasons. As described below, the control of the buffer unit 220 eliminates the time difference and determines whether the main service and the twin service can be matched. . If the matching is possible, the matching unit 231 generates information on timing deviation between the main service and the twin service and provides it to the handover control unit 240. In other words, it provides information on who is ahead of time and how much between main service and twin service. On the contrary, if there is a risk that overflow or underflow occurs in the buffer unit 230 while trying to solve the time difference because it is too large, the matching unit 231 provides information that it is impossible to match, or otherwise buffer overflow or buffer under. Timing deviation information is generated and provided to the handover controller 240 as long as no flow occurs. Meanwhile, the timing deviation between the main service and the twin service may be determined from information (eg, a time stamp and a dedicated field) included in the bitstream header of the broadcast data, and may recognize an identifier for another means, for example, a picture (frame). Alternatively, it may be possible to determine by actually decoding and comparing some or all of the I-pictures.

In addition, the matching unit 231 provides a switching between the broadcast data provided from the first buffer 221 and the broadcast data provided from the second buffer 222 and provides only the selected broadcast data to the decoder unit 232. The handover control unit 240 controls which broadcasting data the matching unit 231 selects. Preferably, when the receiving terminal 100 leaves the service area by moving the area as shown in FIG. Since the broadcast service received in the above is no longer available, the handover control unit 240 switches to the broadcast data prepared in advance as a twin service. Once this switch is made, the previous twin service is changed to the main service, and the second tuner 212 previously receiving the twin service becomes the main tuner. On the other hand, while the main service before switching is deleted or becomes a temporary twin service, the new service is gradually discovered and the first tuner 211 receiving the main service before switching becomes a sub-tuner.

The decoder 232 decodes the audio signal and the video signal. The decoder unit 232 may have one codec therein or two different codecs. For example, an audio codec for decoding an audio signal and a video codec for decoding a video signal may be implemented as separate chipsets, and in some embodiments, a single chipset in which the audio codec and the video codec are integrally implemented may be used. You may. As such, the audio signal generated by the decoder 232 is output to the speaker SPK, and the video signal is output to the screen providing unit 233.

The screen providing unit 233 is configured to display an image of mobile digital broadcasting service contents to a user, and may be configured in various forms such as an LCD, a cathode ray tube, and an LED panel.

The user interface unit 251 may be configured in a variety of forms such as a key matrix form, a keypad form, a touch pad form, a voice recognition module, and the like to allow a user to input a desired command.

The position detecting unit 253 is a component for estimating the position information of the receiving terminal 100 and may be implemented with an accurate position measuring module such as a GPS or the receiving terminal through checking the reception strength of a broadcast signal or analyzing a TPEG signal. The location of 100 may also be estimated approximately. In addition, the user's voice may be provided with the current location information from the outside in such a manner as to be recognized. In addition, the location detector 253 may provide an expected entry area through information on a service area to which the receiving terminal 100 currently belongs and information on a direction in which the terminal is currently moving. Information about the direction you are traveling can be obtained from the GPS module or from the compass. When the location detector 253 notifies the expected entry area, the subtuner may search for the twin service more efficiently.

The storage unit 252 is a configuration for storing various types of information related to digital broadcasting, and includes a first database DB-1 and a second database DB-2. First, the first database DB-1 stores channel / service information for digital broadcasting for each region, for example, various kinds of information as disclosed in FIG. 3. The second database DB-2 stores a mapping table for the same regional broadcasting service for digital broadcasting. That is, a mapping table is prepared by arranging in advance which broadcast service corresponds to which region by digital broadcasting content. In the present invention, the twin service corresponding to the main service needs to be identified. When the second database DB-2 is provided, this identification process can be performed very effectively. If there is no second database (DB-2), the twin service must be identified from the first database (DB-1), which can be identified by comprehensively examining the ensemble label and the service label or by referring to the lower 8 bits of the service ID. have. This twin service identification process is preferably performed by the handover control unit 240 to be described later.

The handover control unit 240 is a component that performs the overall control operation of the receiving terminal 100. In particular, it identifies a twin service for the main service and controls the first tuner 211 and the second tuner 212 of the tuning unit 210 to receive the main service and the twin service in different service areas. In addition, the handover controller 240 receives the matching determination information from the matching unit 231 and controls the buffer unit 220 to perform matching between the main service and the twin service. That is, as described above, the timing deviation information is provided from the matching unit 231, and the buffer unit 220 controls the movement of the buffer pointer for the twin service to correspond thereto. This is to try to match the playback timing with the main service as much as possible by pulling a little or slowing down the playback time for the twin service, so that the user does not notice the fact at all even after switching.

4 is a flowchart schematically illustrating a matching handover process for mobile digital broadcasting according to the present invention. Since the technical idea of the present invention has been described in detail with reference to FIGS. 1 to 3, only a schematic processing flow will be described with reference to FIG. 4.

Referring to FIG. 4, first, the handover controller 240 controls the main tuner 211 of the receiving terminal 100 in step S300 to receive a broadcast service (main service) from the current service area.

Subsequently, the receiver terminal 100 acquires channel / service information with respect to a neighboring area near the service area to which the reception terminal 100 currently belongs, for example, by referring to the first database DB-1 prepared in advance (S302). And the same broadcast service (twin service) as the main service is identified in the adjacent area of the receiving terminal 100 based on the location information of the receiving terminal 100 (S304).

The handover control unit 240 then controls the subtuner 212 to receive the identified twin service.

Thereafter, if the receiving terminal 100 detects whether it leaves the service area (S308), the matching unit 231 determines whether the main service and the twin service can be matched (S310), and if matching is possible, Data matching between the broadcast service (main service) and the twin service, which has been received, is performed (S312). In this case, the process of performing data matching may be performed after the departure of the service area is detected as shown in FIG. 4, or the data matching may be performed in advance. Both approaches have their advantages and disadvantages, so you can choose one depending on your implementation.

When data matching between the main service and the twin service is completed, the broadcasting service is switched to provide the twin service to the decoder unit 232, which is provided to the screen providing unit 233. That is, it means that the twin service becomes the main service, so that the second tuner 212, which was a subtuner before switching, becomes the main tuner, and the first tuner 211, which was the main tuner before switching, becomes the subtuner. .

The present invention can also be embodied in the form of computer readable code on a computer readable recording medium. At this time, the computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored.

Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage, and the like, and may be implemented in the form of a carrier wave . The computer-readable recording medium can also be stored and executed by a computer-readable code in a distributed manner on a networked computer system. And functional programs, codes, and code segments for implementing the present invention can be easily deduced by programmers skilled in the art to which the present invention belongs.

As described above, the embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms have been used, they have been used only in a general sense to easily describe the technical contents of the present invention and to facilitate understanding of the invention. And 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 are possible in addition to the embodiments disclosed herein.

10: digital broadcasting providing server
20, 30: broadcasting network
40, 50: digital broadcast transmitter
100: digital broadcast receiving terminal
ANT: Antenna
210: tuning unit
211: first tuner
212: second tuner
220: buffer unit
221: first buffer
222: second buffer
231: matching part
232: decoder
233: screen provider
SPK: Speaker
240:
251: user interface unit
252: storage unit
253 position detection unit

Claims (10)

In a mobile digital broadcasting environment, a tuning unit 210 having a main tuner for receiving a digital broadcast signal in a current service area and a subtuner for receiving a digital broadcast signal in an adjacent area is provided to cope with local movement of a receiving terminal. An apparatus for providing a matched handover,
A storage unit 252 having a first database for storing channel / service information of the digital broadcasting for each region;
A position detector 253 for estimating position information of the receiving terminal;
Broadcast data of a digital broadcast signal (hereinafter, 'main service') provided from the main tuner of the tuning unit 210 and a digital broadcast signal (hereinafter, 'twin service') provided from a sub-tuner of the tuning unit 210. A buffer unit 220 for storing the;
A matching unit 231 for providing matching determination information including timing deviation information on the broadcasting data of the main service and the twin service stored in the buffer unit 220 and providing switching for the main service and the twin service;
Receiving the twin service which is the same broadcast service as the main service received by the main tuner based on the channel / service information obtained from the first database of the storage unit 252 and the location information provided from the location detector 253. Identify the neighboring area of the terminal, control the tuning unit 210 to receive the identified twin service by the subtuner, and receive matching determination information from the matching unit 231 to correspond to the timing deviation information. When the buffer unit 220 controls the buffer unit 220 to match the main service and the twin service by moving and controlling the buffer pointer for the twin service, and when the service area deviation of the receiving terminal is detected. A handover control unit 240 for controlling the matching unit 231 to switch between the main service and the twin service;
Apparatus for providing a matched handover of a broadcast service in a mobile digital broadcasting environment comprising a.
delete The method according to claim 1,
When the matching unit 231 determines that matching between the main service and the twin service is impossible due to the possibility of a buffer overflow and a buffer underflow, the timing deviation is limited so long as the buffer overflow and the buffer underflow do not occur. Apparatus for providing a matched handover of a broadcast service in a mobile digital broadcasting environment, characterized in that for generating information.
The method according to claim 3,
The location detection unit 253 provides an entry expected area according to a current service area and a moving direction of the receiving terminal as the location information,
The handover control unit 240 identifies the twin service for the main service of the main tuner in the entry predicted area provided by the location detector 253, and a matching hand of a broadcast service in a mobile digital broadcasting environment. Device for providing overs.
The method of claim 4,
The storage unit 252 further includes a second database for storing a mapping table for the same broadcast service for each region of the digital broadcast.
The handover control unit (240) is an apparatus for providing a matched handover of a broadcast service in a mobile digital broadcasting environment, characterized in that further based on the second database when identifying the twin service.
A method for providing a matched handover of a broadcast service in response to local movement of a receiving terminal having a main tuner and a sub tuner in a mobile digital broadcasting environment,
A first step of setting a database for storing channel / service information for the digital broadcasting by region;
A second step of controlling a main tuner of the receiving terminal to receive a broadcast service (hereinafter, 'main service') from a current service area;
Estimating location information of the receiving terminal;
A fourth step of identifying a broadcast service (hereinafter, referred to as 'twin service') as the main service in an adjacent region of the receiving terminal based on the channel / service information obtained from the database and the estimated location information;
Controlling the subtuner to receive the identified twin service;
A sixth step of determining whether to match broadcast data between the main service and the twin service, and as a result, generating matching determination information including timing deviation information;
A seventh step of controlling the buffer of the twin service to match the main service and the twin service by moving and controlling a buffer pointer for the twin service in the buffer unit 220 to correspond to the timing deviation information;
An eighth step of switching the main service and the twin service when the service area deviation of the receiving terminal is detected;
Method for providing a matched handover of a broadcast service in a mobile digital broadcasting environment comprising a.
delete The method of claim 6,
In the sixth step, when it is determined that matching between the main service and the twin service is impossible due to the possibility of a buffer overflow and a buffer underflow, the timing deviation information may be obtained unless buffer overflow and buffer underflow occur. A method for providing a matched handover of a broadcast service in a mobile digital broadcasting environment, characterized by generating.
The method according to claim 8,
The third step may be provided as the location information, the estimated area of entry according to the current location and the moving direction of the receiving terminal,
The fourth step is to identify the twin service for the main service in the entry prediction area provided in the third step, the method for providing a matched handover of a broadcast service in a mobile digital broadcasting environment.
A computer-readable recording medium having recorded thereon a broadcast service matched handover program for providing a matched handover of a broadcast service in a mobile digital broadcasting environment according to any one of claims 6, 8 and 9.

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