KR20070008897A - Terrestrial digital multimedia broadcasting system and method for improved broadcasting configuration information obtaining - Google Patents

Abstract

A terrestrial DMB system and a method for obtaining improved broadcasting service configuration information are provided to set a return channel with a broadcasting station corresponding to changed broadcasting service coverage when broadcasting service coverage is changed and download broadcasting service configuration information from the broadcasting station, thereby significantly shortening time required to update the broadcasting service configuration information according to the changed broadcasting service coverage. A terrestrial DMB system for obtaining improved broadcasting service configuration information comprises the followings: a DMB receiving terminal(400); the first coverage broadcasting station(306) which receives location information of the DMB receiving terminal(400) from a mobile telecommunication station(402) when a location confirmation request is received from the DMB receiving terminal(400), determines whether the DMB receiving terminal(400) exists within its broadcasting service coverage(304), and transmits information for confirming whether the broadcasting service coverage(304) is changed to the DMB receiving terminal(400) according to determination result; the second coverage broadcasting station(318) which supplies the broadcasting service configuration information of the second ensemble frequency to the DMB receiving terminal(400) according to the request of the DMB receiving terminal(400); and the mobile telecommunication station(402).

Description

TERRESTRIAL DIGITAL MULTIMEDIA BROADCASTING SYSTEM AND METHOD FOR IMPROVED BROADCASTING CONFIGURATION INFORMATION OBTAINING}

1 is a diagram illustrating a structure of an ensemble used in a general terrestrial DMB system;

2 is a diagram illustrating a configuration of a transmission frame in a general terrestrial DMB.

3 is an exemplary configuration diagram of a global broadcasting station and a regional broadcasting station in a general terrestrial DMB;

4 is a configuration diagram of an embodiment of the present invention for acquiring broadcast service configuration information according to movement between terrestrial DMB receiving terminals in a terrestrial DMB system;

5 is a flowchart illustrating a process of a terrestrial DMB receiving terminal obtaining broadcast service configuration information in a terrestrial DMB system according to an embodiment of the present invention;

6 is a flowchart of a process of acquiring changed broadcast service configuration information when broadcast service configuration information is changed in a terrestrial DMB system according to an embodiment of the present invention.

The present invention relates to a terrestrial DMB system, and more particularly, to a method in which a terrestrial DMB receiving terminal acquires broadcast service configuration information from a terrestrial digital multimedia broadcasting station.

Terrestrial Digital Multimedia Broadcasting (DMB) is a multimedia broadcasting service including video based on the Digital Audio Broadcasting (DAB) (Eureka-147) system, a European digital radio broadcasting standard that provides CD-quality audio and data services simultaneously. Is the world's first domestic system standard to provide.

The advantage of such terrestrial DMB broadcasting over general digital broadcasting such as Advanced Television Systems Committee (ATSC) or Digital Video Broadcasting (DVB) is that it can listen to the broadcast on the go. In other words, if the DMB user has a DMB receiving terminal, the user can listen to the broadcast as much as he / she is on the move.

Another feature of terrestrial DMB broadcasting is that broadcasting services are not limited to video services, and audio and data services can also be received through broadcasting. Therefore, more channels and services are available through terrestrial DMB than fixed terrestrial digital broadcasting.

In general, the terrestrial DMB broadcast signal is composed of ensemble units, and one ensemble consists of several services. Each service includes service components.

That is, one ensemble becomes a basic element constituting the terrestrial DMB broadcast signal, and the user can listen to a specific service by selecting a service in the ensemble. Usually, one ensemble may have a plurality of video services, audio services, and data services.

1 is an exemplary diagram illustrating a structure of an ensemble used in a terrestrial DMB system.

Referring to FIG. 1, an ensemble used in a terrestrial DMB system includes a plurality of services and service components constituting each service. The structure of this ensemble follows the DAB standard proposed by Eureka-147. Thus, as shown, the ensemble 101 labeled "DAB ENSEMBLE ONE" is comprised of services called "ALPHA 1 RADIO" 102, "BETA RADIO" 103, and "ALPHA 2 RADIO" 104. It can be seen that each service is composed of a plurality of service components 105 to 110 again.

The service in this ensemble is included in a part of one ensemble frame called the main service channel (MSC) 114 to 118, and the broadcast service configuration information of the main service channel is a fast information channel (FIC). It may be found through the multiplex configuration information (MCI) 111 and the service information (SI) 112 received through a channel.

FIG. 2 is a diagram illustrating an example of a structure of a transmission frame in a general terrestrial DMB, and shows a detailed structure of data transmitted through the fast information channel. In general, a terrestrial DMB broadcasting station broadcasts broadcast service configuration information of a main service channel through the fast information channel. In addition, the terrestrial DMB broadcasting station repeats broadcasting based on a predetermined broadcast period by dividing it into small blocks called fast information blocks (FIBs) to increase transmission efficiency of the broadcast service configuration information.

Referring to FIG. 2, the data transmitted through the fast information channel includes a plurality of FIBs as described above. Each FIB is composed of a plurality of FIG (Fast Information Group). In addition, it is possible to know what information the FIG includes according to the type specified in the header of the FIG. For example, FIG. 2 illustrates FIG type 0 and FIG type 1, wherein FIG type 0 refers to FIG including the MCI information and SI information, and FIG type 1 is used to display information content of a subchannel. Refers to FIG including label information.

Accordingly, when the user selects and tunes a specific ensemble, the DMB receiving terminal first receives and parses the FIB for one period from the fast information channel. When the broadcasting service configuration information such as the MCI information 111 and the SI information 112 is derived as the parsing result, the broadcasting services constituting the main service channel of the specific ensemble can be shown to the user. The user may select a channel of a digital multimedia broadcasting of a desired broadcast from among these services.

However, such terrestrial DMB broadcasting cannot maintain the same ensemble frequency among all regions due to adjacent channel interference. Accordingly, each digital multimedia broadcasting station provides a digital multimedia broadcasting service using different frequencies. That is, even if a terrestrial DMB broadcast signal having an index of "ensemble 1" is received at a frequency of "a" in an area of "A", an index of "ensemble 1" is also recorded at the same frequency of "a" in an area of "B". It is not guaranteed that a terrestrial DMB broadcast signal having a is received. In addition, each region may have its own broadcast channel and broadcast service, and accordingly, the broadcast service structure in the ensemble may be different. Therefore, when the region changes, the terrestrial DMB receiving terminal must find information on each ensemble again through ensemble scanning due to the change of the frequency.

Referring to FIG. 3, one global broadcasting station 302, a global broadcasting region 300, and a plurality of regional broadcasting stations 306, 310, 314, and 318 in the global broadcasting region 300, respectively. It can be seen that the regional broadcasting areas 304, 308, 312, and 316 according to the regional broadcasting stations are included. Here, the global broadcasting station 302 is a broadcasting station for broadcasting digital multimedia broadcasting data common to all the regions (hereinafter referred to as global broadcasting), and the regional broadcasting station means broadcasting of digital multimedia broadcasting data limited to a part of the global broadcasting region. Hereinafter referred to as regional broadcasting). Accordingly, in the case of the global broadcast, the ensemble of the global broadcast is the same in any region, but in the case of the regional broadcast, the ensemble of the regional broadcast is different according to the region.

In this case, in the regional broadcasting area D 318, which is a broadcasting service area in which a user can receive, for example, the broadcasting service of the regional broadcasting station D 316, the regional broadcasting station area A (the broadcasting service area of the regional broadcasting station A 306) ( Suppose we move to 304). Then, as the user approaches the regional broadcasting station area A 304, the strength of the broadcast signal broadcast from the regional broadcasting station D 318 is weakly received by the user's terrestrial DMB receiving terminal. On the contrary, the strength of the broadcast signal broadcast from the regional broadcasting station A 306 is strongly received by the user's terrestrial DMB receiving terminal.

When the user passes the overlap region 320 of the regional broadcasting region D 316 and the regional broadcasting region A 304, the strength of the signal broadcast from the regional broadcasting station D 318 becomes less than or equal to the threshold value. Then, the user's terrestrial DMB receiving terminal (hereinafter referred to as DMB receiving terminal) determines that it is out of the broadcasting service area of the regional broadcasting station D 318. In such a case, when the user is informed of the fact, the user may select an ensemble of the regional broadcaster A 306 and select a desired broadcast channel from the ensemble of the regional broadcaster A 306.

In this case, however, in order to select a channel desired by the user, the ensemble configuration of the regional broadcasting station A 306 must be known first. In order to know the ensemble configuration, broadcast service configuration information had to be received from the regional broadcasting station A 306.

As described above, the broadcast service configuration information, that is, the MCI information 111 and the SI information 112 (hereinafter referred to as MCI_SI information) has a characteristic of unidirectional transmission broadcasted through a plurality of FIBs based on a predetermined broadcast period. have. Accordingly, in the case of a conventional DMB receiving terminal, when the broadcast service area is changed, the broadcast service configuration information may be confirmed only by receiving and parsing FIBs during one broadcast period. Accordingly, a typical DMB receiving terminal should receive all FIBs during the one broadcast period.

Therefore, if the time when the broadcasting service area of the DMB receiving terminal is changed while the FIBs are being broadcast, the DMB receiving terminal has to wait until the start of a new broadcasting cycle of new FIBs. In this case, if an error occurs or a reception is missed among the received FIBs, the DMB receiving terminal should receive that the error occurs or the reception is missed from the FIBs broadcast in the next broadcast period. Therefore, in the conventional terrestrial DMB system, there is a problem that a time delay for receiving broadcast service configuration information of the changed broadcast service zone occurs when the broadcast service zone is changed.

In addition, in the case of the conventional terrestrial DMB system, it is determined whether or not the service area is changed according to the magnitude of the reception strength of the broadcast signal. When the service area is changed, it is necessary to receive and parse the FIBs including the changed new broadcast service configuration information. Therefore, in the conventional terrestrial DMB receiving system, since the parsing time is taken in addition to the delay time for receiving the broadcast service configuration information, there is a problem in that the total time required for updating the broadcast service configuration information is longer.

It is therefore an object of the present invention to provide a system and method for reducing the time required for a DMB receiving terminal to receive broadcast service configuration information when a broadcast service area is changed in a terrestrial DMB system.

It is still another object of the present invention to provide a system and method for further shortening the time for updating the broadcast configuration of the changed broadcast service zone by the DMB receiving terminal when the broadcast service zone is changed.

In order to achieve the above object, the terrestrial DMB system of the present invention, when the reception strength of the DMB data according to the first ensemble frequency is less than a predetermined threshold value, the first regional broadcasting station to request its own location confirmation, DMB receiving terminal receiving the confirmation information from the broadcast service area change information from the broadcast area, and requesting the broadcast service configuration information of the second ensemble frequency to the second regional broadcasting station if the broadcast service area is changed, and confirm the location from the DMB receiving terminal When the request is received, receiving the location information of the DMB receiving terminal from the mobile communication base station to determine whether the DMB receiving terminal is in its own broadcast service area, and according to the determination result, the broadcast service area to the DMB receiving terminal A first-area broadcasting station for transmitting change information and the number of DMBs; At the request of the terminal and a second region of the station providing the broadcast service configuration information of the second frequency in the ensemble, the DMB receiving terminal.

In addition, the present invention, if there is a change in the broadcast service configuration of the broadcast digital multimedia broadcasting data, the DMB broadcasting station for broadcasting the notice of the change notification to the channel on which the DMB data is broadcast, and the change notice information is received, the change DMB broadcasting station for storing the information on the time when the change is scheduled and the DMB broadcasting station having the broadcast service configuration change from the notice information, and when the change is the scheduled time, broadcasting the currently received DMB data and the change notice information. If the DMB broadcasting station is the same, and includes the DMB receiving terminal for requesting the changed broadcast service configuration information and receiving it from the DMB broadcasting station.

In another aspect, the present invention provides a method for obtaining broadcast configuration information by the DMB receiving terminal, wherein the DMB receiving terminal is the first regional broadcasting station when the reception strength of DMB data broadcast from the first regional broadcasting station is less than or equal to a preset threshold; A positioning step of requesting a location confirmation, and the DMB receiving terminal receiving information on whether a current location of the DMB receiving terminal is included in the broadcast service area of the first regional broadcasting station from the first regional broadcasting station; A broadcast service of the second ensemble frequency to the second regional broadcaster when the DMB receiving terminal receives the broadcast service domain inclusion information and recognizes the change of the broadcast service domain by the DMB receiving terminal; The broadcast service configuration information request step of requesting configuration information, and the DMB receiving terminal, Receiving a broadcast service configuration information of the second ensemble frequency from the second regional broadcasting station.

The present invention also provides a method for providing broadcast configuration information to a DMB receiving terminal, wherein the location information of the DMB receiving terminal is received from the mobile communication base station when the first regional broadcasting station receives a location request from the DMB receiving terminal. A location information acquisition step of obtaining a location information, a step of determining, by the first regional broadcasting station, whether the location of the DMB receiving terminal is included in its broadcasting service area using the location information, and the first regional broadcasting station; The broadcast service zone confirmation information transmitting step of transmitting broadcast service zone confirmation information indicating whether the current location of the DMB receiver terminal is included in its broadcast service zone to the DMB receiver terminal, and the second zone broadcast station, There is a broadcast service configuration information request of the second ensemble frequency from the DMB receiving terminal. If it includes a providing step.

The present invention also provides a method for acquiring changed broadcast configuration information by a DMB receiving terminal, the receiving step of receiving, by the DMB receiving terminal, change notification information informing of a broadcast service configuration change from the DMB broadcasting station, and the DMB receiving terminal. A notice information confirming step of confirming, from the change notice information, the change time of broadcast service configuration information and the information on the broadcast service area where the change of the broadcast service configuration is predicted; and, when the DMB receiving terminal is at the change point, A broadcast service zone comparison step of comparing the information on the broadcast service zone according to its current location with the information on the broadcast service zone according to the change notice information, and by the DMB receiving terminal, as a result of the comparison, the broadcast service zone The change from the DMB station if the information for It includes a change information download steps to download the broadcast service configuration information.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are denoted by the same reference numerals wherever possible. In the following description and the annexed drawings, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

First of all, in order to facilitate a complete understanding of the present invention, the basic principles of the present invention will be described. From the terrestrial DMB broadcasting station (hereinafter referred to as the first regional broadcasting station) for providing a check whether or not the current position is an area according to the broadcasting service region of the first regional broadcasting station. If the current location of the DMB receiving terminal is not an area corresponding to the broadcasting service area of the first broadcasting station, a terrestrial DMB broadcasting station (hereinafter referred to as a second regional broadcasting station) and a return channel corresponding to the changed broadcasting service area are set. do. The broadcast service configuration information is downloaded from the second regional broadcasting station through the set return channel.

Accordingly, the DMB receiving terminal of the terrestrial DMB system according to an embodiment of the present invention does not need to wait for a broadcast cycle for receiving broadcast service configuration information from the terrestrial DMB broadcasting station of the changed broadcast service area when the broadcast service area is changed. In addition, as the DMB receiving terminal directly requests and downloads the broadcasting service configuration information from the terrestrial DMB broadcasting station of the changed broadcasting service region, the DMB receiving terminal receives the broadcasting service configuration information which is not divided into FIB units. Can be received. Accordingly, the DMB receiving terminal according to an embodiment of the present invention does not need to parse the broadcast service configuration information. Therefore, in the terrestrial DMB system according to an embodiment of the present invention, when the broadcast service zone is changed, the time for updating broadcast service configuration information according to the changed broadcast service zone can be greatly shortened.

FIG. 4 is a diagram illustrating a configuration of an embodiment of the present invention for acquiring broadcast service configuration information according to an inter-regional movement of a terrestrial DMB receiving terminal in a terrestrial DMB system.

Referring to FIG. 4, according to an embodiment of the present invention, a terrestrial DMB system capable of reducing a time for receiving broadcast service configuration information may receive terrestrial DMB broadcast data and receive a DMB with a mobile communication function. When the change of the broadcast service area occurs due to the position movement of the terminal 400 and the DMB receiving terminal 400, the change of the service area occurs due to the movement of the first-area broadcasting station before the change of the service area and the mobile communication terminal. A mobile communication base station 402 which transmits information on the location of the DMB receiving terminal 400 to the first regional broadcasting station in response to a request from the second regional broadcasting station and the first regional broadcasting station according to the changed broadcasting service region; And return channels 406 and 408 respectively established between the respective regional broadcasting stations and the DMB receiving terminal 400.

4 assumes that the DMB receiving terminal 400 is in the overlapping region 320 of FIG. 3. Accordingly, it is assumed that the DMB receiving terminal 400 moves from the regional broadcasting area D 316 to the regional broadcasting area A 304 according to an embodiment of the present invention. Accordingly, in the following description, it will be assumed that the first regional broadcasting station is a regional broadcasting station D 318 and the second regional broadcasting station is a regional broadcasting station A 306.

Referring to FIG. 4, the DMB receiving terminal 400 detects the strength of a broadcast signal received from the regional broadcasting station D 318. Then, as the user moves, the superimposition zone 320 is reached to check whether the strength of the broadcast signal broadcast from the regional broadcasting station D 318 decreases below the threshold value. If the strength of the broadcast signal is less than or equal to a preset threshold, the local broadcasting station D 318 requests the confirmation of the location of the current DMB receiving terminal 400.

Here, the DMB receiving terminal 400 uses the connection information of the regional broadcasting station D 318 included in the broadcast service configuration information of the regional broadcasting station D 318 to request the location confirmation, and returns a preset return channel (return channel). D: 406). When it is confirmed that the broadcast service zone has been changed by the zone broadcaster D 318, the zone broadcaster A 306 requests the setting of a return channel (return channel A: 408). The broadcast service configuration information of the regional broadcasting station A 306 is downloaded through the set return channel A 408.

In this case, the return channel refers to a transmission path provided by the DMB receiving terminal for bidirectional communication with a broadcasting station in addition to the transmission path through which the DMB broadcast data is transmitted. An example of such a return channel may be a mobile communication network such as Code Division Multiple Access (CDMA), Wideband-CDMA (WCDMA), Global System for Mobile communication (GSM), or the like, and a TCP / IP network or a Wireless Broadband Internet (WBro). It is also possible to use a mobile Internet network such as).

In addition, the regional broadcasting station D 318 connects to the mobile communication system when a request for positioning is received from the DMB receiving terminal 400. The DMB receiving terminal 400 recognizes the location of the DMB receiving terminal 400 through the registered mobile communication base station 402. In addition, it is determined whether the current location of the DMB receiving terminal 400 corresponds to its own broadcast service area, that is, the regional broadcast area D 316. Then, according to the determination result, information informing the service area change is transmitted to the DMB receiving terminal 400.

In this case, if the service area information of the DMB receiving terminal 400 is changed, the regional broadcasting station D 318 may change the service area as well as information indicating the change of the service area. In accordance with the present invention, access information for accessing the regional broadcasting station of the changed service area is transmitted. The access information may vary depending on the type of return channel used by the DMB receiving terminal 400. For example, if the DMB receiving terminal 400 uses a TCP / IP network as a return channel, the access information may be a TCP / IP address of the regional broadcasting station A 306.

The regional broadcasting station A 306, which has received a request for setting the return channel A 408 from the DMB receiving terminal 400 confirming the change of the service area, approves the setting of the return channel A 408. When a request for broadcast service configuration information is received from the DMB receiving terminal 400, the broadcast service configuration information is transmitted to the DMB receiving terminal 400. Then, the DMB receiving terminal 400 downloads it. Accordingly, the present invention can greatly reduce the time for receiving broadcast service configuration information according to the changed broadcast service zone when the broadcast service zone is changed. In addition, since the process of parsing the broadcast service configuration information is not required, the newly changed broadcast service configuration can be updated more quickly.

FIG. 5 is a flowchart illustrating a process in which a terrestrial DMB receiving terminal acquires broadcast service configuration information in a terrestrial DMB system according to an embodiment of the present invention. In FIG. It is assumed that the mobile station moves from the local area broadcasting region 304 to. The DMB receiving terminal 400 will be described on the assumption that the return channel is established with the regional broadcasting station 318.

Referring to FIG. 5, when the user selects to watch a digital multimedia broadcasting, the DMB receiving terminal 400 according to an embodiment of the present invention proceeds to step 500 and receives the digital multimedia broadcasting data received from the regional broadcasting station D 318. Receive In operation 502, the DMB receiving terminal 400 checks the reception strength of the broadcast signal received in step 500. Then, it is checked whether the received reception strength is less than or equal to a preset threshold. If the reception strength of the broadcast signal is less than or equal to the preset threshold in step 502, the DMB receiving terminal 400 proceeds to step 504 and sends a location request signal for the current location confirmation to the regional broadcasting station D 318. Transmit through preset return channel.

The regional broadcasting station D 318 which has received the location request signal from the DMB receiving terminal 400 proceeds to step 506 to access the mobile communication system. The DMB receiving terminal 400 accesses the registered mobile communication base station 402 and requests confirmation of the current location of the DMB receiving terminal 400. The mobile communication base station 402 then proceeds to step 508 to transmit information about the location of the DMB receiving terminal 400 to the regional broadcasting station D 318.

The regional broadcasting station D 318 then proceeds to step 510 to determine whether the DMB receiving terminal 400 is currently in its own broadcasting service area based on the location information received from the mobile communication base station 402. . The regional broadcasting station D 318 proceeds to step 512 to transmit service area confirmation information according to the result of the confirmation in step 510. The broadcast service zone confirmation information may include a broadcast service zone when the DMB receiving terminal 400 is located in the zone broadcast zone D 316 which is the broadcast service zone of the zone broadcast station D 318. Contains information indicating that no changes have been made. However, if the DMB receiving terminal 400 is out of the regional broadcasting area D 316, the DMB receiving terminal 400 includes information indicating that the broadcasting service domain has been changed.

In addition, the broadcast service area confirmation information includes information of a regional broadcasting station corresponding to a new broadcast service area changed according to the change if the broadcast service area is changed. That is, in the case of FIG. 5, when the broadcasting service zone is changed according to the position movement of the DMB receiving terminal 400, the regional broadcasting station D 318 broadcasts the information about the regional broadcasting station A 306 to the broadcasting. Include in the service area confirmation information and send. Accordingly, the broadcast service zone confirmation information includes connection information for the zone broadcaster A 306. The DMB receiving terminal 400 accesses the regional broadcasting station A 306 through the return channel using the access information, and requests the approval of the return channel for requesting the broadcast service configuration information of the regional broadcasting station A 306. Can be.

Accordingly, when the broadcast service zone confirmation information indicating that the broadcast service zone has been changed is received, the DMB receiving terminal 400 proceeds to step 516 and uses the access information to access the regional broadcast station A 306 using the preset return channel. In step 516, the DMB receiving terminal 400 requests the regional broadcasting station A 306 to approve a return channel. The regional broadcasting station A 306 proceeds to step 518 to approve the return channel at the request of the DMB receiving terminal 400. In step 520, the regional broadcasting station A 306 transmits a signal indicating the approval of the return channel to the DMB receiving terminal 400. When the DMB receiving terminal 400 receives the acknowledgment signal of the return channel, a return channel between the DMB receiving terminal 400 and the regional broadcasting station A 306 is set.

In step 522, the DMB receiving terminal 400 requests broadcast service configuration information of the regional broadcasting station A 306. Then, the regional broadcasting station A 306 receiving the process proceeds to step 524 and transmits the broadcast service configuration information to the DMB receiving terminal 400 in response to the request. In step 526, the DMB receiving terminal 400 receives the updated broadcast service configuration using the newly received broadcast service configuration information.

In this case, the broadcast service configuration information transmitted from the regional broadcasting station A 306 to the DMB receiving terminal 400 is broadcast service configuration before being divided into FIB units for transmission in a fast information channel as shown in FIG. 2. I'm talking about information. Accordingly, when the broadcast service configuration information is received in step 524, the DMB receiving terminal 400 may immediately use the update of the broadcast service configuration without parsing it. Accordingly, in the embodiment of the present invention, when the broadcast service zone is changed, the time for receiving the broadcast service configuration information of the changed broadcast service zone and the update time of the broadcast service configuration according to the change can be greatly shortened.

However, the broadcast service configuration information may be broadcasted to the DMB receiving terminal even when the broadcast service area is not changed. This case usually occurs when a broadcasting station broadcasting digital multimedia broadcasting data changes its own configuration of a broadcasting service. For example, such a change may include a new broadcast service, that is, adding a channel or changing an existing channel.

As such, when the broadcast service configuration is changed, the broadcasting station broadcasts a notification informing of a change time of the broadcast service configuration and a change in the broadcast service configuration in advance. When the corresponding time is reached, configuration information of the changed broadcast service is broadcast. Then, the DMB receiving terminals in the broadcast service area of the broadcasting station update the broadcast service configuration to match the broadcast service configuration information with the actual broadcast service.

6 is a flowchart illustrating a process of acquiring changed broadcast service configuration information from the broadcasting station when the broadcast service configuration is changed in the terrestrial DMB system according to an exemplary embodiment of the present invention. In addition, the process shown in FIG. 6 assumes that broadcast service configuration information is changed while the DMB receiving terminal 400 is located in one regional broadcasting station or a global broadcasting station. In FIG. 6, it is assumed that a return channel is preset between the DMB receiving terminal 400 and the broadcasting station.

Referring to FIG. 6, when there is a change in the broadcast service configuration, the broadcasting station 600 of the terrestrial DMB system according to an embodiment of the present invention proceeds to step 602 to determine when the broadcast service configuration is changed and the broadcast service configuration. The broadcast service configuration change notification information for notifying the change is generated. Here, the broadcasting station 600 refers to any one of the terrestrial DMB broadcasting stations according to the broadcasting service area of the DMB broadcasting terminal 400. In operation 604, the broadcaster 600 broadcasts the broadcast service configuration change notification information to the broadcast service area of the broadcaster 600. When it is time to change the configuration of the broadcast service, the process proceeds to step 610 to change the configuration of the broadcast service.

Meanwhile, in step 604, the DMB receiving terminal 400 receiving the broadcast service configuration change notice information from the broadcast station 600 proceeds to step 606 and checks the timing of the broadcast service configuration change from the broadcast service configuration change notice information. . The DMB receiving terminal 400 proceeds to step 608 to check whether the current time is the point in time. If the scheduled time arrives, the DMB receiving terminal 400 proceeds to step 612 and requests the broadcast station 600 to change the broadcast service configuration information through a preset return channel. In step 614, the broadcaster 600 receiving the request transmits the changed broadcast service configuration information to the DMB receiving terminal 400 through the return channel in response to the request. In step 616, the DMB receiving terminal 400 receives the updated broadcast service configuration using the newly received broadcast service configuration information.

In this case, the broadcast service configuration information transmitted from the broadcast station 600 to the DMB receiving terminal 400 includes broadcast service configuration information before splitting into FIB units for transmission in a fast information channel as shown in FIG. 2. I speak. Accordingly, when the broadcast service configuration information is received in step 524, the DMB receiving terminal 400 may immediately use the update of the broadcast service configuration without parsing it. Accordingly, in the embodiment of the present invention, when the broadcast service configuration is changed, the time for updating the broadcast service configuration by acquiring the changed broadcast service configuration information from the broadcasting station can be greatly reduced.

6 illustrates an example in which the DMB receiving terminal transmits notice information indicating that a change in the broadcast service configuration information occurs, and is in one broadcast service area until the notice time is reached. However, if the change of the broadcast service configuration information is foreseen and the change time is scheduled, the broadcast service area of the DMB receiving terminal may be changed.

In this case, if the broadcast service area is changed, the DMB receiving terminal does not need to change the broadcast configuration information even if the change time is reached. If the DMB receiving terminal moves to the broadcast service area where the change of broadcast service configuration information is notified before the change time passes, even if the broadcast service area has been changed, the changed broadcast service configuration information is transmitted at the change time. You should be able to receive it.

Accordingly, when the DMB receiving terminal according to the embodiment of the present invention receives the change notice information of the broadcast service configuration information, the DMB receiving terminal stores not only the change time but also information on the broadcast service area that changes according to the change time. The DMB receiving terminal according to an embodiment of the present invention compares the information on the broadcast service area with the information on the broadcast service area of the current DMB receiving terminal when the change time arrives.

And when the broadcast service area information is the same, the changed broadcast service configuration information is received from the terrestrial DMB broadcasting station of the broadcast service area. However, if the broadcast service area information according to the change notice information and the broadcast service area information of the DMB receiving terminal are not the same, the change notice information is deleted. Accordingly, when the change notification information is received, the DMB receiving terminal according to the embodiment of the present invention updates the broadcast service configuration according to the current broadcast service area when the change time comes.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the invention should not be defined by the described embodiments, but should be determined by the equivalent of claims and claims.

When the broadcast service zone is changed, the present invention sets a broadcast station and a return channel corresponding to the changed broadcast service zone, and downloads broadcast service configuration information from the broadcast station through the set return channel. If there is a change in the broadcast service configuration information, the changed broadcast service configuration information is downloaded from the broadcasting station at the time of notice. Accordingly, the present invention does not need to wait for a broadcast cycle for receiving broadcast service configuration information from the broadcaster of the changed broadcast service zone when the broadcast service zone is changed, and requires a process of parsing the broadcast service configuration information received from the broadcast station. none. Therefore, the present invention can greatly shorten the time for updating the broadcast service configuration information when the update of the broadcast service configuration occurs due to the change of the broadcast service area or the change of the broadcast service configuration.

Claims (26)

Digital multimedia broadcasting (DMB) receiving terminal having a mobile communication function, a first-area broadcasting station broadcasting DMB data currently received by the receiving terminal at a first ensemble frequency, and DMB data in an area according to a moving target of the DMB receiving terminal. A terrestrial DMB broadcasting system comprising a second regional broadcasting station broadcasting a second ensemble frequency and a mobile communication base station having position information of the DMB receiving terminal. The DMB receiving terminal, when the reception strength of the DMB data according to the first ensemble frequency is less than or equal to a preset threshold, requests the first area broadcasting station to confirm its location to determine whether to change the broadcasting service area from the first regional broadcasting station. Receiving the information and requesting the broadcasting service configuration information of the second ensemble frequency from the second broadcasting station when the broadcasting service area is changed, and receiving the information; When the location checking request is received from the DMB receiving terminal, the first regional broadcasting station receives location information of the DMB receiving terminal from the mobile communication base station to determine whether the DMB receiving terminal is in its broadcast service area. And transmitting confirmation information on whether a broadcast service area is changed to the DMB receiving terminal according to the determination result. And the second regional broadcasting station provides broadcast service configuration information of the second ensemble frequency to the DMB receiving terminal in response to a request of the DMB receiving terminal. The method of claim 2, wherein the DMB receiving terminal, By using the connection information of the first regional broadcasting station from the broadcast service configuration information of the first ensemble frequency previously received, a return channel different from a path where the DMB data is received from the first regional broadcasting station is received. A terrestrial DMB system for acquiring improved broadcast service configuration information, characterized in that set up with a broadcast station. The method of claim 2, wherein the DMB receiving terminal, Requesting a location confirmation of the DMB receiving terminal to the first regional broadcasting station through the return channel, and receiving confirmation information on whether to change the broadcasting service region or the terrestrial DMB system. The method of claim 1, wherein the first regional broadcasting station, As a result of determining whether the DMB receiving terminal is in its own broadcast service area based on the location information of the DMB receiving terminal, if the DMB receiving terminal is not included in its own broadcasting service area, it may access the second regional broadcasting station. Terrestrial DMB system for acquiring improved broadcast service configuration information comprising transmitting access information to the DMB receiving terminal. The method of claim 4, wherein the DMB receiving terminal, And establish a return channel different from a path for receiving DMB data from the second regional broadcasting station with the second regional broadcasting station using the access information. The method of claim 5, wherein the DMB receiving terminal, Requesting the broadcasting service configuration information of the second ensemble frequency from the second regional broadcasting station through the return channel, and receiving the broadcasting service configuration information of the second ensemble frequency from the second regional broadcasting station. Terrestrial DMB system for obtaining broadcast service configuration information. The method of claim 2 or 4, wherein the return channel, Improved broadcasting service, characterized in that it is any one of Code Division Multiple Access (CDMA), Wideband-CDMA (WCDMA), Global System for Mobile communication (GSM), TCP / IP network, and Wireless Broadband Internet (WiBro) portable Internet network Terrestrial DMB system for obtaining configuration information. The method of claim 1, wherein the second regional broadcasting station, And providing the broadcast service configuration information in a state in which it is not divided into transmission units for broadcasting the DMB data, to the DMB receiving terminal. The method of claim 1, wherein the broadcast service configuration information, Terrestrial DMB system for acquiring improved broadcast service configuration information characterized by multiplex configuration information (MCI) and service information (SI). In terrestrial digital multiplex broadcasting (DMB) system, A DMB broadcasting station broadcasting change notification information informing of a broadcasting service configuration change of broadcast digital multimedia broadcasting data through a channel on which the DMB data is broadcast; When the change notice information is received, information about the time at which the change is scheduled and the DMB broadcasting station with the change in the broadcast service configuration is stored from the change notice information. Improved broadcast service configuration information comprising a DMB receiving terminal requesting and receiving the changed broadcast service configuration information from the DMB broadcasting station broadcasting the data and the DMB broadcasting station according to the change notice information is the same. Terrestrial DMB system for acquisition. The method of claim 10, wherein the DMB receiving terminal, Improved broadcast service configuration characterized in that when the change is scheduled time, the DMB broadcasting station broadcasting the currently received DMB data and the DMB broadcasting station according to the change notice information is not the same, and the change notice information is deleted. Terrestrial DMB system for information acquisition. The method of claim 10, wherein the DMB broadcast station, And providing the broadcast service configuration information in a state in which it is not divided into transmission units for broadcasting the DMB data, to the DMB receiving terminal. The method of claim 10, wherein the DMB receiving terminal, And setting a return channel with the DMB broadcasting station using access information extracted from the broadcasting service configuration information previously received from the DMB broadcasting station. The method of claim 13, wherein the DMB receiving terminal, Terrestrial DMB system for acquiring improved broadcast service configuration information, characterized in that for downloading the changed broadcast service configuration information through the return channel. Digital multimedia broadcasting (DMB) receiving terminal having a mobile communication function, a first-area broadcasting station broadcasting DMB data currently received by the receiving terminal at a first ensemble frequency, and DMB data in an area according to a moving target of the DMB receiving terminal. A method for acquiring broadcast service configuration information by a DMB receiving terminal in a terrestrial DMB broadcasting system including a second regional broadcasting station broadcasting a second ensemble frequency, A location determining step of requesting, by the DMB receiving terminal, a location confirmation request from the first regional broadcasting station when the reception strength of DMB data broadcast from the first regional broadcasting station is less than or equal to a preset threshold value; Receiving, by the DMB receiving terminal, information about whether the current location of the DMB receiving terminal is included in the broadcasting service area of the first regional broadcasting station from the first regional broadcasting station; When the DMB receiving terminal receives the broadcast service region inclusion information and recognizes the change of the broadcast service region, the broadcast service configuration information request for requesting the broadcast service configuration information of the second ensemble frequency from the second regional broadcasting station; Steps, And receiving, by the DMB receiving terminal, broadcast service configuration information of the second ensemble frequency from the second regional broadcasting station. The method of claim 15, wherein the positioning step, Setting, by the DMB receiving terminal, a return channel with the first regional broadcasting station through connection information extracted from the broadcast service configuration information of the first regional broadcasting station previously received; And positioning, by the DMB receiving terminal, requesting the first regional broadcasting station to request information about the current location of the DMB receiving terminal. The method of claim 15, wherein the request for broadcasting service configuration information comprises: A connection information receiving step of the DMB receiving terminal receiving connection information from the first regional broadcasting station to the DMB receiving terminal to connect to the second regional broadcasting station; A return channel setting step of setting, by the DMB receiving terminal, a return channel with the second regional broadcasting station using the access information; Requesting, by the DMB receiving terminal, the broadcast service configuration information of the second ensemble frequency from the second regional broadcasting station through the return channel. The method of claim 17, wherein the receiving step, And the DMB receiving terminal downloads broadcast service configuration information of the second ensemble frequency from the second regional broadcasting station through the return channel. The method of claim 18, wherein the receiving step, And the DMB receiving terminal downloads, through the return channel, broadcast service configuration information from the second regional broadcasting station without splitting the second regional broadcasting station into transmission units for broadcasting DMB data. Terrestrial DMB method for obtaining broadcast service configuration information. Digital multimedia broadcasting (DMB) receiving terminal having a mobile communication function, a first-area broadcasting station broadcasting DMB data currently received by the receiving terminal at a first ensemble frequency, and DMB data in an area according to a moving target of the DMB receiving terminal. A method for providing broadcast service configuration information to the DMB receiving terminal in a terrestrial DMB broadcasting system comprising a second regional broadcasting station broadcasting a second ensemble frequency and a mobile communication base station having position information of the DMB receiving terminal. Obtaining, by the first regional broadcasting station, location information of the DMB receiving terminal from the mobile communication base station when receiving a location confirmation request from the DMB receiving terminal; Determining, by the first regional broadcasting station, whether or not the location of the DMB receiving terminal is included in its broadcasting service region using the location information; Transmitting, by the first regional broadcasting station, broadcasting service area confirmation information to the DMB receiving terminal, the broadcasting service area confirmation information indicating whether the current location of the DMB receiving terminal is included in its broadcasting service area; And providing, by the second regional broadcasting station, a request for broadcasting service configuration information of the second ensemble frequency from the DMB receiving terminal. The method of claim 20, wherein the determining step, Determining, by the first regional broadcasting station, whether the position of the DMB receiving terminal according to the location information is out of the broadcasting service region of the first regional broadcasting station; A change information generation step of generating, by the first regional broadcasting station, broadcast service regional area change information to the DMB receiving terminal when the DMB receiving terminal is out of the broadcasting service region of the first regional broadcasting station as a result of the service region determination; A step of including connection information for the first regional broadcasting station to include, in the broadcasting service regional area change information, connection information for connecting the second regional broadcasting station to the DMB receiving terminal; And transmitting, by the first regional broadcasting station, broadcast service regional area change information including the access information to the DMB receiving terminal. The method of claim 20, wherein the providing step, A return channel setting step of setting, by the second regional broadcasting station, a return channel with the DMB receiving terminal according to the connection of the DMB receiving terminal; And providing, by the second regional broadcasting station, broadcast service configuration information through the return channel in response to a broadcast service configuration information request of the second ensemble frequency of the DMB receiving terminal. Method for obtaining information. The method of claim 22, wherein the providing of the broadcast service configuration information comprises: The second regional broadcasting station provides the broadcast service configuration information without division into transmission units for broadcasting DMB data to the DMB receiving terminal through the return channel. Terrestrial DMB method for.  The DMB receiving terminal acquires broadcast service configuration information of the DMB broadcasting station in a terrestrial DMB system including a digital multiplex broadcasting (DMB) receiving terminal and a DMB broadcasting station broadcasting digital multimedia broadcasting data received by the DMB receiving terminal. In the method, A reception step of receiving, by the DMB receiving terminal, change notice information for notifying a change in broadcast service configuration from the DMB broadcasting station; A notice information confirming step of confirming, by the DMB receiving terminal, information on a change point in time of broadcast service configuration information and information on a broadcast service area where a change in broadcast service configuration is announced from the change notice information; A broadcast service zone comparison step of the DMB receiving terminal comparing the information on the broadcast service zone according to its current location with the information on the broadcast service zone according to the change notice information when the change point is reached; And a change information download step of downloading, by the DMB receiving terminal, the changed broadcast service configuration information from the DMB broadcasting station when the information on the broadcast service area is the same as a result of the comparison. Method for Acquisition. The method of claim 24, wherein the downloading of the change information, A setting step of setting, by the DMB receiving terminal, a return channel with the DMB broadcasting station using connection information extracted from the broadcasting service configuration information previously received from the DMB broadcasting station; Requesting, by the DMB receiving terminal, the changed broadcast service configuration information through the return channel; And a change information download step of downloading, by the DMB receiving terminal, the changed broadcast service configuration information according to the request. The method of claim 25, wherein the step of downloading the change information, Improved broadcast service configuration information, characterized in that the DMB receiving terminal downloads broadcast service configuration information from the DMB broadcast station into a transmission unit for broadcasting DMB data by the DMB broadcast station through the return channel. Terrestrial DMB method for acquisition.

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