KR100793317B1 - Method and System for Assisting DMB Service by Using Wireless Data Communication in Digital Multimedia Broadcasting Service System - Google Patents

Abstract

The present invention relates to a method and system for supporting a DMB service using wireless data communication in a DMB service system.

The present invention provides a DMB terminal receiving digital multimedia broadcasting (DMB) service, and a wireless access network for providing wireless data communication path to the DMB terminal to perform wireless data communication (RAN: Radio). A mobile communication system for providing the DMB service in a mobile communication network including an Access Network (PDSN) and a Packet Data Serving Node (PDSN) for relaying transmission and reception of wireless data of the DMB terminal. In the DMB terminal periodically checks the location of the DMB terminal enters the DMB shaded area, and periodically receiving and checking information about the reception sensitivity of the DMB signal from the DMB terminal, the reception sensitivity is unstable Conditions and a signal for requesting the establishment of the wireless data communication path from the DMB terminal is received. And a DMB content server configured to set the wireless data communication path when one or more of the conditions occur, and to download voice data of a DMB broadcast provided to the DMB terminal using the wireless data communication. Provides a DMB service system to assist the DMB service using communication.

According to the present invention, by determining the entry into the shadow area using the location information of the DMB terminal, or periodically check the reception sensitivity of the DMB signal to assist the DMB service through wireless data communication when the DMB service is interrupted. Can provide seamless DMB services. In addition, it is possible to prevent excessive and redundant investment in the DMB service shadow area, thereby reducing the investment cost.

Cellular, DMB, shading, signal, sound

Description

Method and System for Assisting DMB Service by Using Wireless Data Communication in Digital Multimedia Broadcasting Service System}

1 is a diagram schematically showing a DMB service system for assisting streaming of a DMB service using wireless data communication according to an embodiment of the present invention;

2 is a flowchart illustrating a method of assisting streaming of a DMB service using wireless data communication in a DMB service system according to a first embodiment of the present invention;

3 is a flowchart illustrating a method of assisting streaming of a DMB service using wireless data communication in a DMB service system according to a second embodiment of the present invention;

4 is a flowchart illustrating a method of assisting streaming of a DMB service using wireless data communication in a DMB service system according to a third embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: DMB terminal 120: wireless access network

130: LBS server 140: PDSN

150: DMB content server

The present invention relates to a method and system for supporting a DMB service using wireless data communication in a DMB service system. More specifically, in a mobile communication system providing a DMB service, the DMB service may be used by using location information of the DMB terminal, periodically checking the reception sensitivity of the DMB signal of the DMB terminal, or receiving a request for establishing a wireless data communication path from a user. The present invention relates to a method and system for assisting streaming of a DMB service by using wireless data communication in case of disconnection.

As computer, electronic, and communication technologies have made rapid progress, various wireless communication services using wireless networks have been provided. Accordingly, a service provided by a mobile communication system using a wireless communication network is developing not only a voice service but also a multimedia communication service for transmitting data such as circuit data, packet data, and the like. In recent years, the third generation mobile communication system IMT-2000 (International Mobile Telecommunication 2000) (for example, Code Division Multiple Access (CDMA) 2000 1X, 3X, EV-DO, Wideband CDMA (WCDMA, etc.)) has been commercialized. .

However, the existing mobile communication system has a limitation in providing high-speed wireless Internet due to high base station construction cost and high usage rate of the wireless Internet, and a limited screen size of the mobile communication terminal. Therefore, a high-speed portable Internet service (WiBro: Wireless Broadband Internet) has emerged, which guarantees portability and mobility and can use high-speed wireless Internet service at a low rate.

The mobile internet service uses various types of portable communication terminals such as laptops, PDAs, and handheld PCs to access the Internet in indoor and outdoor stationary environments and mobile environments at walking speeds and low to medium speeds. It is a possible service. The portable Internet service system uses the 2.3 GHz frequency band and provides mobility of 60 km / h per hour. The downlink transmission rate is 24.8 Mbps, but the uplink transmission rate is 5.2 Mbps. Wireless data system. In addition, the portable Internet service system uses a time division duplex (TDD) in a duplex scheme or an orthogonal frequency division multiple access (OFDMA) / TDMA (multiple access) scheme in order to effectively use an allocated frequency spectrum. Time Division Multiple Access).

On the other hand, with the development of mobile communication technology, the demand for using a broadcast service including a video service, a voice service, etc. in a mobile communication environment has increased rapidly, and digital multimedia broadcasting (DMB) is referred to as 'DMB'. Service has emerged.

The DMB service refers to a broadcasting service that digitally modulates various multimedia data such as video data and audio data and provides the same to a fixed terminal or a portable terminal. In other words, it means a service that can provide high-quality, high-definition broadcasting of CD (Compact Disc) or DVD (Digital Versatile Disc) level to a mobile communication terminal or a vehicle terminal such as a mobile phone, a PDA (Personal Digital Assistant) even while on the move. Unlike conventional analog broadcasting, the DMB service is combined with a mobile communication network and provides two-way services such as remote purchase, telemedicine, and distance education. For example, you can order an advertising product that is broadcast while moving, and you can download the desired educational program.

DMB service is divided into 'terrestrial DMB' and 'satellite DMB' according to service type and network configuration. Satellite DMB service provides DMB service by using satellite, and when satellite DMB broadcasting center sends broadcasting data to satellite, satellite receives it and transmits it to DMB terminals and gap fillers nationwide to provide DMB service. do.

The satellite DMB service system is roughly composed of a satellite broadcasting transmitting station, a satellite, a Gap Filler, and a DMB receiving mobile communication terminal.

In the operation process, various contents such as video, audio, and data are digitized through a codec and transmitted to a satellite broadcasting station, and the satellite broadcasting station multiplexes (MUX) a plurality of digitized contents through an MPEG2 system. Will be sent to the satellite. The satellite receives the content and transmits the content to the DMB receiving mobile terminal through S-band (CDM).

In addition, the satellite transmits the content to the terrestrial repeater through Ku-band (TDM), and the terrestrial repeater converts the Ku-band (TDM) to S-band (CDM) and transmits it to the DMB receiving mobile terminal. Finally, the DMB receiving mobile communication terminal undergoes a decoding process.

In the conventional DMB service system, when the user moves while receiving DMB service through the DMB terminal, when the power of the instantaneous radio wave is weakened, both the video and audio signals are cut off, and the broadcast flow is missed. Is often happening.

In the shaded areas where the radio waves are weak, the service could not be provided when it was difficult due to the terrain, features, and mountains, or the low-quality service was provided based on the minimum reception angle. There is a problem in that economic investment loss occurs such as redundant equipment or excessive investment.

In order to solve the above problems, the present invention, by using the location information of the DMB terminal in the mobile communication system providing a DMB service, periodically checking the reception sensitivity of the DMB signal of the DMB terminal, or establish a wireless data communication path from the user An object of the present invention is to provide a method and system for assisting the streaming of a DMB service using wireless data communication when the DMB service is interrupted by receiving a request.

In order to achieve the above object, the present invention provides a digital multimedia broadcasting (DMB) terminal receiving a digital multimedia broadcasting (DMB) service, and provides a wireless data communication path to the DMB terminal for wireless data communication. In a mobile communication network including a Radio Access Network (RAN) and a Packet Data Serving Node (PDSN) for relaying transmission and reception of radio data of the DMB terminal, In a mobile communication system providing a DMB service, the location of the DMB terminal is periodically checked to periodically receive information on a condition that the DMB terminal enters a DMB shadow area, and information about a reception sensitivity of the DMB signal from the DMB terminal. And the condition that the reception sensitivity is unstable, and the wireless data communication path from the DMB terminal. A DMB content server configured to set the wireless data communication path and download voice data of a DMB broadcast that is being provided to the DMB terminal by using the wireless data communication when one or more conditions of receiving a signal for requesting information are generated; Provided is a DMB service system that assists DMB services using wireless data communication.

In addition, according to another object of the present invention, a DMB terminal receiving a digital multimedia broadcasting (DMB) service, a wireless data communication path is provided to the DMB terminal to perform wireless data communication. A Radio Access Network (RAN), a Location Based Service (LBS) server for generating location information by calculating the location of the DMB terminal, and the wireless data of the DMB terminal. A packet data serving node (PDSN), which relays transmission and reception, and a DMB content server for downloading voice data of DMB broadcasts provided to the DMB terminal using the wireless data communication; A method of providing the DMB service using a DMB service system, the method comprising: (a) providing the DMB service; (b) periodically checking the location of the DMB terminal using the location information of the DMB terminal; (c) when the DMB terminal enters a preset DMB shadow area, transmitting a request for setting the wireless data communication path to the DMB terminal; (d) establishing the wireless data communication path between the DMB terminal and the DMB content server; And (e) downloading voice data among the data of the DMB broadcast provided in step (a) to the DMB terminal through the wireless data communication. It provides a method to assist the DMB service.

In addition, according to another object of the present invention, a DMB terminal receiving a digital multimedia broadcasting (DMB) service, a wireless data communication path is provided to the DMB terminal to perform wireless data communication. Radio Access Network (RAN), a Packet Data Serving Node (PDSN), which relays transmission and reception of wireless data of the DMB terminal, and the wireless data communication to the DMB terminal. A method of providing the DMB service using a DMB service system including a DMB content server that downloads voice data of a DMB broadcast that is being provided using the service, the method comprising: (a) providing the DMB service; (b) periodically receiving and checking information on the reception sensitivity of the DMB signal from the DMB terminal; (c) if the reception sensitivity of the DMB signal is unstable, transmitting a setup request signal for the wireless data communication path to the DMB terminal; (d) establishing the wireless data communication path between the DMB terminal and the DMB content server; And (e) downloading voice data among the data of the DMB broadcast provided in step (a) to the DMB terminal through the wireless data communication. It provides a method to assist the DMB service.

In addition, according to another object of the present invention, a DMB terminal receiving a digital multimedia broadcasting (DMB) service, a wireless data communication path is provided to the DMB terminal to perform wireless data communication. Radio Access Network (RAN), a Packet Data Serving Node (PDSN), which relays transmission and reception of wireless data of the DMB terminal, and the wireless data communication to the DMB terminal. A method of providing the DMB service using a DMB service system including a DMB content server that downloads voice data of a DMB broadcast that is being provided using the service, the method comprising: (a) providing the DMB service; (b) establishing a wireless data communication path between the DMB terminal and the DMB content server when a request for setting the wireless data communication path is received from the DMB terminal; (c) receiving voice data information including broadcast information and quality of the voice data from the DMB terminal; And (d) downloading the voice data through the wireless data communication. The method provides a method of assisting a DMB service using wireless data communication in a DMB service system.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are designated as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a diagram schematically illustrating a DMB service system for assisting streaming of a DMB service using wireless data communication according to a preferred embodiment of the present invention.

The digital multimedia broadcasting (DMB) service system according to a preferred embodiment of the present invention includes a DMB terminal 110, a radio access network (RAN) 120, a location-based service. (LBS: Location Based Service, hereinafter referred to as 'LBS') The server 130, the Packet Data Serving Node (PDSN: hereinafter referred to as 'PDSN') 140 and the DMB content server 150, etc. Include.

The DMB terminal 110 is a mobile communication terminal having a DMB function that not only performs a voice call wirelessly through a mobile communication network, but also provides a DMB service to a user by accessing a DMB service system.

The DMB terminal 110 is a multimode-multiband (MM-MB) terminal capable of using both a DMB service and a mobile communication service. Here, the multi mode may include a synchronous mode, an asynchronous mode, a WiBro mode, a DMB mode, and the like, and the multiband refers to a frequency band used according to an operation mode of the MM-MB terminal. The mobile communication subscriber can use the mobile communication service by selecting an operation mode according to the type of communication service provided in the region where the subscriber is located by using the MM-MB terminal.

The DMB terminal 110 is a DMB antenna for receiving a DMB signal, a DMB tuner for selecting a signal of a desired channel from among the DMB signals, and an MPEG for decoding the signal received from the DMB tuner according to the MPEG standard for broadcasting. The decoder may include an A / V switch unit for separating the video data or the audio data decoded by the MPEG decoder into an A / V (Audio / Video) signal capable of video and audio output.

In addition, the DMB terminal 110 according to the present invention enters a shaded area while receiving the DMB service, or when the video and audio signals are cut off due to the weakness of the DMB signal, the audio data of the broadcast received through the wireless data communication path To download it, you connect to a wireless internet service and perform wireless data communication. The DMB terminal 110 is equipped with a wireless Internet platform for driving wireless Internet-related applications to perform wireless data communication, and has a built-in browser for wireless Internet access for accessing wireless Internet services.

Here, the wireless Internet platform may include a wireless Internet platform for interoperability (WIPI), a WI-TOP (WI-TOP open platform) manufactured by SK Telecom, based on WIPI, and the like. WI-TOP can be coded in the Java language. Browsers for wireless Internet access include Microsoft Internet Explorer (MIE) and HDTP (Handheld) based on Hypertext Markup Language (HTML) using Hypertext Transfer Protocol (HTTP), as well as WAP browsers based on Wireless Application Protocol (WAP). Device Transport Protocol), NTT DOKOMO's i-Mode or SK Telecom's 'NATE' and 'JUNE'.

Therefore, in the DMB service system according to the preferred embodiment of the present invention, the DMB terminal 110 receiving the DMB service receives the voice data of the broadcast provided from the DMB content server 150 through the wireless data communication path even if the DMB signal is lost. By downloading, at least only the voice data portion of the DMB broadcast can be provided without interruption.

A mobile communication network according to a preferred embodiment of the present invention is an IS (Interim Standard) -95 network, a GSM network, a CDMA2000 1x network, a CDMA2000 3x network, a CDMA2000 EV-DO (Evolution-Data Only) network, a WCDMA network, and a Wibro (Wireless Broadband) network. It may include a wireless access network 120 by various mobile communication systems, such as the Internet (Internet) network.

The radio access network 120 receives and processes radio communication of the DMB terminal 110, performs handoff processing, radio resource management, and the like.

The wireless access network 120 according to the preferred embodiment of the present invention includes a base station transmitter 122, a base station controller 124 and a mobile communication switch 126, and supports both synchronous and asynchronous mobile communication systems. Here, in the synchronous mobile communication system, the base station transmitter 122 is a base transceiver station (BTS), the base station controller 124 is a base station controller (BSC), and in the case of an asynchronous mobile communication system, the base station transmitter 122 is an RTS (Radio). The base station controller 124 is a transceiver network (RNC).

The base station transmitter 122 receives a call request signal from the DMB terminal 110 through a traffic channel of the signal channel and transmits it to the base station controller 124. In addition, the base station transmitter 122 is a network termination device that performs baseband signal processing, wired and wireless conversion, wireless signal transmission and the like and is directly connected to the DMB terminal 110. The base station transmitter 122 is arranged in units of cells and transmits a call request generated from the DMB terminal 110 to the mobile communication switch 126 or exists in the cell area under its control. Perform location registration to determine the location of).

The base station transmitter 122 transmits the position information of the base station transmitter 122 from the global positioning system (GPS) (not shown) to the DMB terminal 110 through a system parameter message of the forward link call channel. The DMB terminal 110 may register new location information by calculating the moving distance of the DMB terminal 110 itself using the location information of the base station transmitter 122 of the cell to which the DMB terminal 110 belongs.

Location registration is a procedure of informing the mobile communication switch 126 of the DMB terminal 110 of the location, status, identifier, slot period, and other characteristics of the DMB terminal 110 through the base station transmitter 122. This is a procedure for effectively calling the DMB terminal 110 when the incoming call is to be established by the communication exchange 126. The location registration of the DMB terminal 110 is performed when the power of the DMB terminal 110 is turned on or off, when the DMB terminal 110 is handed off, and when the system parameters of the DMB terminal 110 are changed. Is carried out in the case.

The base station controller 124 controls the base station transmitter 122, allocates and releases radio channels to the DMB terminal 110, controls transmission output of the DMB terminal 110 and the base station transmitter 122, and soft handoffs. Handoff and hard handoff determination, transcoding and vocoding, GPS clock distribution, operation and maintenance of the base station transmitter 122, and the like are performed. The base station controller 124 transmits subscriber information of the DMB terminal 110 having the location information registered to the mobile communication switch 126, and transmits a call request signal received through the base station transmitter 122 to the mobile communication switch 126. To pass.

The mobile communication switch 126 has a control function for allowing the wireless access network 120 to operate efficiently and an interworking function with a switch of a public telephone network.

In addition, the mobile communication exchange 126 performs basic and additional service processing, incoming and outgoing call processing of the subscriber, location registration procedure and handoff procedure, interworking with other networks. The mobile communication switch 126 of the IS-95 A / B / C system includes an access switching subsystem (ASS) that performs distributed call processing, an INS (interconnection network subsystem) that performs centralized call processing, operation and Subsystems include a Central Control Subsystem (CCS), which is responsible for the centralization of maintenance, and a Location Registration Subsystem (LRS), which performs storage and management of information on mobile subscribers.

In addition, the mobile communication switch 126 for the third and fourth generation may include an Asynchronous Transfer Mode (ATM) switch (not shown). The ATM switch increases the transmission speed and the efficiency of line use by packet transmission per cell. Let's do it. In addition, the ATM switch performs a call processing on a cell basis, a Mobility Control Subsystem that performs a subscriber registration, an update function for performing wireless communication of the DMB terminal 110, and an interface function with the base station controller 124. Subsystems such as a Call Control Subsystem, a Service Control Subsystem for performing billing functions for various supplementary service subscribers, and an Intelligent Peripheral Subsystem for providing various supplementary services. .

The mobile communication switch 126 temporarily stores subscriber information of the DMB terminal 110 in a VLR (Visitor Location Register) (not shown) when location registration of the DMB terminal 110 is performed through the wireless access network 120. Afterwards, a location registration request of the DMB terminal 110 is requested to a home location register (HLR) (not shown).

The LBS server 130 transmits aiding data to assist in determining the location of the DMB terminal 110 and calculates a distance between the GPS satellite (not shown) and the DMB terminal 110. In addition, the LBS server 130 calculates the longitude and latitude coordinates of the DMB terminal 110 using the navigation data transmitted from the DMB terminal 110 via the mobile communication network and transmits the coordinates to the DMB content server 150. Perform.

The PDSN 140 manages a session to service wireless data as packet data, and relays packet data transmission and reception between the DMB content server 150 and the wireless access network 120.

The DMB content server 150 receives the broadcast content from a broadcast program provider (PP), compresses and stores the broadcast content into a digital signal, and provides the data through wireless data communication when the DMB terminal 110 does not receive the DMB signal. It is a server that provides a seamless DMB service by downloading the voice data of the broadcast to the DMB terminal 110.

The DMB content server 150 according to the preferred embodiment of the present invention uses a wireless data communication method when the DMB terminal 110 does not receive a DMB signal to establish a path for wireless data communication to assist the DMB service. By periodically checking the location information of the DMB terminal 110 from the LBS server 130 and entering a shaded area where the strength of the DMB radio waves is weak, a method of establishing a wireless data communication path with the DMB terminal 110, the DMB terminal ( By periodically checking the reception sensitivity of the DMB signal of 110), if the reception sensitivity decreases below a certain intensity for a predetermined time or more, a method of establishing a wireless data communication path and a user of the DMB terminal 110 directly identify Use the command or shortcut key (e.g. Nate execution button) to perform the wireless data communication setup request to establish the wireless data communication path. Use the prescribed manner.

The above-described method will be described in detail with reference to FIGS. 2, 3 and 4.

2 is a flowchart illustrating a method of assisting streaming of a DMB service using wireless data communication in a DMB service system according to a first embodiment of the present invention.

According to a preferred embodiment of the present invention, if the user is provided with the DMB service through the DMB terminal 110 (S202), the DMB content server 150 receives the location information of the DMB terminal 110 from the LBS server 130 The position of the DMB terminal 110 is periodically checked (S204).

While checking the location of the DMB terminal 110, it is determined whether the DMB terminal 110 enters a preset shadow area (S206), and when the user enters the shadow area, the strength of the DMB signal is weakened and the DMB service is stopped. In order to prevent the phenomenon, the DMB terminal 110 transmits a request signal for establishing a wireless data communication path (S208).

When the DMB terminal 110 receives the wireless data communication path setting request signal from the DMB content server 150, the DMB content server 150 establishes a wireless data communication path with the DMB terminal 110 (S210).

After establishing a wireless data communication path with the DMB terminal 110, the voice data information including the broadcast information of the broadcast currently being viewed and the quality of the voice data to be provided is received from the DMB terminal 110 (S212). .

The DMB content server 150 converts the voice data of the broadcast provided by the DMB terminal 110 into a quality corresponding to the voice data information and starts downloading through the wireless data communication path (S214).

While downloading the voice data through the wireless data communication path, the location of the DMB terminal 110 is periodically checked using the location information of the DMB terminal 110 (S216), and the DMB terminal 110 moves out of the shadow area. In step S218, if the user moves out of the shaded area, the wireless data communication path is released and the downloading of voice data is terminated (S220).

3 is a flowchart illustrating a method of assisting streaming of a DMB service using wireless data communication in a DMB service system according to a second embodiment of the present invention.

According to a preferred embodiment of the present invention, if the user is provided with the DMB service through the DMB terminal 110 (S302), the DMB content server 150 receives the sensitivity of receiving the DMB signal from the DMB terminal 110 via the mobile communication network. Periodically receive and check (S304).

While checking the reception sensitivity of the DMB signal by the DMB terminal 110, it is determined whether the reception sensitivity of the DMB signal is unstable (S306), and if the reception sensitivity of the DMB signal is unstable, for example, to a certain intensity or less for a predetermined time. If the decrease occurs more than a certain number of times, in order to prevent the DMB service from being interrupted due to instability of the DMB signal, the device transmits a request for setting a wireless data communication path to the DMB terminal 110 (S308).

When the DMB terminal 110 receives the wireless data communication path setting request signal from the DMB content server 150, the DMB content server 150 establishes a wireless data communication path with the DMB terminal 110 (S310).

After establishing a wireless data communication path with the DMB terminal 110, the voice data information including the broadcast information of the broadcast currently being viewed and the quality of the voice data to be provided is received from the DMB terminal 110 (S312).

The DMB content server 150 converts the voice data of the broadcast provided by the DMB terminal 110 into a quality corresponding to the voice data information and starts downloading through the wireless data communication path (S314).

While downloading voice data through the wireless data communication path, the reception sensitivity of the DMB signal of the DMB terminal 110 is periodically checked (S316), and it is determined whether the reception sensitivity of the DMB signal is stable (S318). When the reception sensitivity is stabilized, the wireless data communication path is released and the download of the voice data is terminated (S320).

4 is a flowchart illustrating a method of assisting streaming of a DMB service using wireless data communication in a DMB service system according to a third embodiment of the present invention.

According to a preferred embodiment of the present invention, while the user is receiving the DMB service through the DMB terminal 110 (S402), the DMB content server 150 is connected to the wireless data communication path from the DMB terminal 110 via the mobile communication network. It is determined whether a signal for requesting setting is received (S404).

When the DMB content server 150 receives a signal from the DMB terminal 110 requesting the user to establish a wireless data communication path generated by using a specific command or a shortcut key (for example, a nate execution button), the DMB terminal ( In step S406, a wireless data communication path is established.

After the DMB content server 150 establishes a wireless data communication path with the DMB terminal 110, the DMB content server 150 receives voice data information including broadcast information of a broadcast currently being viewed and quality of voice data to be provided from the DMB terminal 110. (S408).

The DMB content server 150 converts the voice data of the broadcast provided by the DMB terminal 110 into a quality corresponding to the voice data information and starts downloading through the wireless data communication path (S410).

In the preferred embodiment of the present invention, when the user wants to download the video data through the wireless data communication, the DMB content server 150 provides the video data and the audio data at the same time by using the wireless data communication as well as the voice data. When the terminal 110 enters the DMB broadcasting shadow area or fails to receive the DMB signal normally, the terminal 110 provides streaming of the DMB service by assisting the streaming of the DMB signal when the DMB service is stopped.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, the DMB service is determined through wireless data communication when the DMB service is terminated by determining the entry into the shadow area using the location information of the DMB terminal or periodically checking the reception sensitivity of the DMB signal. By supporting the high quality DMB services can be provided seamlessly. In addition, it is possible to prevent excessive and redundant investment in the DMB service shadow area, thereby reducing the investment cost.

Claims (15)

DMB terminal receiving digital multimedia broadcasting (DMB) service, and a wireless access network (RAN) for providing wireless data communication path to the DMB terminal to perform wireless data communication (RAN: Radio Access Network) And a packet data serving node (PDSN) for relaying transmission and reception of wireless data of the DMB terminal, wherein the mobile communication system provides the DMB service. Periodically checking the location of the DMB terminal to allow the DMB terminal to enter a DMB shaded area, receiving and checking information on the reception sensitivity of the DMB signal from the DMB terminal periodically, and having an unstable reception sensitivity; When one or more of the conditions for receiving a signal for requesting the setting of the wireless data communication path are received from the DMB terminal, the wireless data communication path is set, and the DMB broadcasting is being provided to the DMB terminal using the wireless data communication. DMB content server to download voice data from Including; And information on the DMB shadow area is pre-set in the DMB content server. The method of claim 1, The DMB content server receives the location information of the DMB terminal from a location based service (LBS) server that calculates the location of the DMB terminal to generate location information. DMB service system to assist the DMB service using wireless data communication, characterized in that for checking. delete The method of claim 1, The DMB content server configures the wireless data communication path when the reception sensitivity decreases to a predetermined intensity or less for a predetermined time. The DMB service assists the DMB service using wireless data communication. system. DMB terminal receiving digital multimedia broadcasting (DMB) service, and a wireless access network (RAN) for providing wireless data communication path to the DMB terminal to perform wireless data communication (RAN: Radio Access Network) A location based service (LBS) server for calculating location of the DMB terminal and generating location information, and a packet data serving node for relaying transmission and reception of wireless data of the DMB terminal; PDSN: The DMB using a DMB service system including a Packet Data Serving Node (hereinafter referred to as 'PDSN') and a DMB content server that downloads voice data of a DMB broadcast that has been provided to the DMB terminal using the wireless data communication. In the method of providing a service, (a) providing the DMB service; (b) periodically checking the location of the DMB terminal using the location information of the DMB terminal; (c) when the DMB terminal enters a preset DMB shadow area, transmitting a request for setting the wireless data communication path to the DMB terminal; (d) establishing the wireless data communication path between the DMB terminal and the DMB content server; And (e) downloading voice data among the data of the DMB broadcast provided in step (a) to the DMB terminal through the wireless data communication; Method of supporting a DMB service using wireless data communication in a DMB service system comprising a. The method of claim 5, wherein before step (c), (c-1) determining whether the DMB terminal enters the DMB shadow area The method of supporting a DMB service using wireless data communication in a DMB service system, characterized in that it further comprises. The method of claim 5, wherein in step (e), The DMB content server receives broadcast information and voice data information from the DMB terminal, and the voice data information includes information on the quality of the voice data. How to subsidize DMB services. The method of claim 7, wherein in step (e), And the DMB content server converts and downloads the voice data according to the quality included in the voice data information and supports the DMB service using wireless data communication in the DMB service system. The method of claim 5, wherein after step (e), (f) checking the location of the DMB terminal, if the DMB terminal leaves the DMB shadow area, canceling the wireless data communication and terminating downloading of the voice data; The method of supporting a DMB service using wireless data communication in a DMB service system, characterized in that it further comprises. DMB terminal receiving digital multimedia broadcasting (DMB) service, and a wireless access network (RAN) for providing wireless data communication path to the DMB terminal to perform wireless data communication (RAN: Radio Access Network) The voice data of the DMB broadcast, which is provided by using a packet data serving node (PDSN) for relaying transmission and reception of wireless data of the DMB terminal and the wireless data communication to the DMB terminal. In the method for providing the DMB service using a DMB service system comprising a DMB content server for downloading the; (a) providing the DMB service; (b) periodically receiving and checking information on the reception sensitivity of the DMB signal from the DMB terminal; (c) if the reception sensitivity of the DMB signal is unstable, transmitting a setup request signal for the wireless data communication path to the DMB terminal; (d) establishing the wireless data communication path between the DMB terminal and the DMB content server; And (e) downloading voice data among the data of the DMB broadcast provided in step (a) to the DMB terminal through the wireless data communication; Including; After step (e), (f) checking the reception sensitivity of the DMB signal, and if the reception sensitivity is stabilized, canceling the wireless data communication and terminating downloading of the voice data. A method of supporting DMB service using wireless data communication. The method of claim 10, wherein, prior to step (c), (c-1) determining whether the reception sensitivity of the DMB signal of the DMB terminal is unstable The method of supporting a DMB service using wireless data communication in a DMB service system, characterized in that it further comprises. The method of claim 10, wherein in step (c), The DMB content server wirelessly establishes a wireless data communication path with the DMB terminal when the reception sensitivity of the DMB signal decreases to a predetermined intensity or less for a predetermined time. How to assist DMB service using data communication. delete DMB terminal receiving digital multimedia broadcasting (DMB) service, and a wireless access network (RAN) for providing wireless data communication path to the DMB terminal to perform wireless data communication (RAN: Radio Access Network) The voice data of the DMB broadcast, which is provided by using a packet data serving node (PDSN) for relaying transmission and reception of wireless data of the DMB terminal and the wireless data communication to the DMB terminal. In the method for providing the DMB service using a DMB service system comprising a DMB content server for downloading the; (a) providing the DMB service; (b) establishing a wireless data communication path between the DMB terminal and the DMB content server when a request for setting the wireless data communication path is received from the DMB terminal; (c) receiving voice data information including broadcast information and quality of the voice data from the DMB terminal; And (d) downloading the voice data through the wireless data communication Method of supporting a DMB service using wireless data communication in a DMB service system comprising a. The method of claim 14, wherein prior to step (b), (b-1) determining whether the DMB content server receives a request for establishing the wireless data communication path from the DMB terminal; The method of supporting a DMB service using wireless data communication in a DMB service system, characterized in that it further comprises.

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