KR20090058042A - Method and apparatus for searching of content by using content metadata in a mobile communication system - Google Patents

Abstract

A contents search method using metadata repository in a mobile communication and an apparatus thereof are provided to perform mobile contents based on relation between contents metadata by designing contents metadata repository. A metadata repository(204) stores content metadata and metadata. The content metadata comprises a specific search word. The search word is not included in metadata. The search word is related with content metadata. A search engine(202) searches the mobile contents about the search word with reference to the meta data waste paper spool of thread.

Description

TECHNICAL AND METHOD IN APPARATUS FOR SEARCHING OF CONTENT BY USING CONTENT METADATA IN A MOBILE COMMUNICATION SYSTEM}

The present invention relates to a technology for searching content in a mobile communication system, and in particular, content metadata in a mobile communication system suitable for designing a content repository to perform a search based on a metadata linkage relationship of content. The present invention relates to a method and an apparatus for searching contents.

Currently, the wireless data communication market using the Internet and mobile communication systems is growing very rapidly and continues to create new customers. Mobile operators, handset manufacturers, software companies and content providers around the world are investing in wireless Internet to understand the limitations of the already saturated wired Internet and to preoccupy the new wireless Internet market.

Until now, almost all mobile communication terminals have been implemented to use wireless Internet. However, the price of wireless internet is expensive compared to wired internet network. However, wireless internet is not rapidly becoming common, but the number of mobile subscribers and internet users is high. The growth potential is endless.

The wireless data transmission service through the mobile terminal, which is the most used in Korea, has recently developed a wireless Internet site using the wireless Internet protocol, and some sites are in operation. A wireless terminal capable of wireless data communication using a device has also been released. Through this, Internet users will be able to receive various wireless Internet contents without time and space constraints using this wireless Internet protocol.

Most mobile carriers have established independent networks of mobile operators, attract subscribers, and provide their subscribers with limited wireless Internet content. Therefore, there are several mobile communication companies in Korea, and a number of wireless Internet content providing servers operated by each mobile communication company are operating.

Recently, with the generalization of the Internet, various web services such as advertisement, e-commerce, personal web page account, and data download / upload have been actively performed on the web based on web server and web browser. In addition, with the widespread use of personal wireless user devices, web services are prevalent in the wireless Internet environment.

On the other hand, in order to use the wireless Internet in the mobile communication terminal currently uses a wireless application protocol (WAP: Wireless Application Protocol).

WAP provides powerful interoperability by providing information retrieval and advanced services on the Internet to mobile terminals or to multiple user devices (PDAs, PMPs, UMPCs, and laptops) that can access the wireless Internet. In the past, mobile content services have been provided through mobile communication companies based on the WAP.

Therefore, even when searching through a mobile communication terminal, the main WAP page of the mobile communication company can access the search page only to enter the search method.

1 is a diagram illustrating a search method in a mobile communication system according to the prior art.

Referring to FIG. 1, when performing a search using a mobile communication terminal in a mobile communication system, the mobile communication terminal accesses a mobile communication network in step 102 to execute a search service by calling a search engine. Thereafter, in step 104, a search word to be searched is inputted, or a search word which can cover the content to be searched is input. In this case, the search range searched through the input search word may be textual content such as search tag information extracted from a title or body text.

In the mobile communication network, the text-type content searched through the input search word is transmitted to the mobile communication terminal, so that the mobile communication terminal can check the search result for the input search word. In addition, the searched results may be checked by sorting by recent registration date, number of search frequencies, etc. according to the priority sorting scheme of the mobile communication terminal user.

In the conventional content retrieval method that operates as described above, text-oriented content is generally searched mainly on the web, whereas in a mobile environment, a content content search method is restricted due to limitations in input and output of a search word. Since there is a difficulty in performing a method of searching contents based on this, there is a problem in that an efficient search cannot be performed.

Accordingly, the present invention provides a method and apparatus for retrieving content using content metadata in a mobile communication system for efficiently retrieving mobile content through storage and management of content metadata including a linkage function between contents.

In addition, the present invention is to design a content metadata repository for efficient retrieval of multimedia content in a mobile environment, and to use the content metadata in the mobile communication system to search for mobile content based on the relationship between the content metadata Provides a search method and apparatus.

In addition, the present invention is to manage the mobile content metadata based on the offline source content, because the mobile content is reproduced as a content suitable for the nature based on the offline content, the metadata of the mobile content itself is not efficiently collected and managed By providing a method and apparatus for retrieving content using content metadata in a mobile communication system capable of minimizing duplication of metadata and efficiently managing linkage relationships.

According to an embodiment of the present invention, when performing a content search for a specific search term in order to search for mobile content, the source metadata corresponding to the specific search term is searched among the source content including the reference metadata. Searching for metadata of the source metadata and a preset linkage relationship; searching for mobile metadata corresponding to the specific search term in the service metadata of the mobile content; and searching the metadata of the linkage relationship with the mobile metadata; Retrieving data using a linkage weight that is predetermined according to a linkage relationship between the source content and the data retrieved from the mobile content metadata, and searching for mobile content by the set priority. Including the process of printing the information list do.

According to an embodiment of the present invention, when a search request for a specific search word is received from a mobile communication terminal connected to a mobile communication network, the device may search for the specific search word to perform mobile content search based on a linkage relationship between content metadata. The mobile terminal may search for the mobile content with respect to the specific search term by referring to the content metadata including the metadata and the metadata repository that does not include the specific search word but includes metadata associated with the content metadata. Contains the search engine to run.

Meanwhile, in the present invention, when the metadata associated with the specific search word is present, at least one of source content, a relational role assignment, an association degree of a search result, and a linkage weight associated with the metadata is provided. It is characterized by setting the table for each specific search word.

In addition, in the present invention, when performing a mobile content search for a specific search term, the metadata repository may include a source content unit configured to search for the specific search term in original content including search reference metadata; Search for the corresponding search word through a linkage relationship between the source content included in the source content unit, the source content link unit that provides the searched data to the source content unit, and the content used in the mobile based on the metadata for the service A mobile content unit including metadata about the mobile terminal, searching for mobile content metadata corresponding to a searched search term, and outputting searched content metadata from the searched mobile content and relations associated with the mobile content; Moba included in the mobile content portion Perform a search through a linkage relationship between one or more contents, perform a search through a linkage relationship between a mobile content linker providing the searched metadata to the mobile content unit, and a linkage relationship between the source content unit and the metadata of the mobile content unit; A mobile content / source content linker for providing the searched metadata to the mobile content unit, and a linkage role unit for setting the priority of each searched content by assigning a linkage of the linkages and weights for each linkage relationship.

In the present invention, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

According to the present invention, a search is performed through various linkage relations between contents, and the existing user inputs a search term and uses a circular reference structure of linkage relations in a simple manner of searching contents based on a content name that matches the search term. By searching for content, related content data can be expanded and searched. Also, by providing a search structure suitable for the limitation of text input such as mobile and multimedia content-oriented environment, the accuracy and efficiency of the search can be improved.

In addition, by managing separate mobile contents and independent source metadata separately for managing mobile content and managing the relationship between them, data can be minimized by minimizing the input of duplicate metadata and simplifying the complex relationship between contents based on the source content. Minimize your storage space and bring accurate and fast search results.

Even if the user wants to purchase and utilize the metadata from the outside, by securing the source metadata, there is an effect that can be immediately utilized in connection with the service content.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

The present invention is to efficiently search for mobile content through the storage and management of content metadata including a linkage function between the contents, and in particular, to design a content metadata repository for efficient search when searching for multimedia content in a mobile environment, the content meta A search of mobile content is performed based on a content metadata linkage relationship between data.

In addition, since the above mobile content is reproduced as a content suitable for the mobile characteristics based on offline content, the metadata of the mobile content itself is not efficiently collected and managed, and thus the mobile content metadata is managed based on the source content to manage the metadata. Minimize redundancy and manage relationships efficiently.

2 is a block diagram showing the structure of a search apparatus in a mobile communication system according to a preferred embodiment of the present invention.

Referring to FIG. 2, the search apparatus 200 is included in a server of a mobile communication network, performs a search for a searched search word according to a search request of a mobile communication terminal wirelessly interworking with the mobile communication network, and results To be transmitted to the mobile communication terminal, and includes a search engine 202 and a metadata repository 204.

The search engine 202 searches for a search word input from the mobile communication terminal based on the metadata repository 204 according to a search request of the mobile communication terminal, and extracts contents corresponding to the searched metadata through the content storage unit 206. The content list is provided to the mobile communication terminal. In this case, the search engine 202 may not search only contents including a simple search word, but may also search and provide content associated with the searched content using the metadata repository 204.

3 is a diagram illustrating a content retrieval method through a linkage relationship in a mobile communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, for example, in the existing search method, when the mobile content 300 is searched through the search word Lee Hyo-ri, the search word matches the search word Lee Hyo-ri in the mobile content 300. Pictorial "and" UCC: Lee Hyo-ri broadcast accident exposure ". That is, the conventional search method searches only the content directly related to the search word.

In the present invention, when performing a content search associated with Lee Hyo-ri, first search for the content contained in the original content 310 in step A to search for Lee Hyo-ri person, the content found in the source content 310 is present In the case of step B, in the source content 110 through the mobile content / source content association 305 unit in the source content 110 search for the star pictorial associated with the mobile content 300, Lee Hyo-ri related images and videos found in UCC In step c, the search list of the corresponding information found in the mobile content 300 is output.

In addition to the steps A, B, and C that search for content directly related to the search word, the "10minute" contained in the music album of Lee Hyo-ri through the link between the source content that performs the link between the source content through the step D and the step E. And the title of the drama that appeared in the broadcast, and also the group "Pinkle," formerly associated with Lee Hyo-ri, are searched in conjunction.

In addition, in step F, through the link unit 305 between the mobile content / source content for the song and appearance drama of Lee Hyo-ri checks the text and video content such as music video, appearance drama scene, Lee Hyo-ri news about Lee Hyo-ri song, In addition to the search through the Lee Hyo-ri search term retrieved from the mobile content 300 in step G, the music data, music video video, news, and Lee Hyo-ri drama video information called by Hyo-ri are provided to the user as search information.

On the other hand, in step F it is possible to further provide a search, such as viewing the related artist for "Finkle", it is possible to perform a continuous search for the related artist and the members of the group in step H.

In other words, if you search for Lee Hyo-ri, you can only search for Lee Hyo-ri's broadcast accident exposure and Lee Hyo-ri's sexy pictorial, which includes Lee Hyo-ri directly.However, if you use the linkage search, you can search for mobile content using source content related to Hyo-ri. You can find content that is not related to, but is directly relevant. This can be usefully used when it is difficult to input a search word when registering multimedia contents based on mobile.

As such, the existing search can be searched for various and accurate contents through a linkage relationship in the way of searching only the morpheme of the title or the designated search word. In addition, by setting weights between linkages, it is possible to reflect contents that should be searched first for closer linkage or marketing.

4 is a flowchart illustrating a search procedure in a mobile communication system according to a preferred embodiment of the present invention.

Referring to FIG. 4, when a user requests a search by inputting a search word using a mobile communication terminal in step 400, the search engine 202 of the search apparatus 200 refers to the metadata repository 204 in step 402. In operation 410, it is determined whether there is content directly related to the corresponding search word in the source content. However, if it does not exist, the method proceeds to step 404 to search for previously stored customer preference items, and determines whether there is content searched for in the customer preference items in step 406. If the content does not exist in the customer preference item, the existing text-based search is performed in step 408.

However, if the content found in the customer preference item is present in step 406, if it is determined whether to specify the search type of the output content to proceed to step 410, if the type is not specified, in step 412 the content directly connected to the content Search and proceed to step 418.

In this case, if the output content type is specified in step 410, the process proceeds to step 414 to search by specifying an input search word and a type of the search word. Performs content search based on rules. In this case, the type is an output rule for the user to use when searching in advance. The search type by genre and the search term "Lee Hyo Ri", which do not include all the search terms, allow the search of contents with the tag information "Hyo Ri". Type, etc.

In operation 418, the content associated with the search word is extracted. That is, the content is searched in order of high weight as contents related to metadata corresponding to the search word, and the searched content is extracted. Accordingly, in step 420, when the content search is completed from the search device 200 to the mobile communication terminal, a message indicating whether the content search is completed is transmitted. ) To request further retrieval of other content associated with the content.

In this case, the search apparatus 200 is another content associated with the content. For example, in the case of a search by type, the search apparatus 200 performs a search encompassing other types besides the content searched by type, or the ascending or descending order of weights associated with the metadata. You can enable search.

In step 420, when the content search is completed, the search apparatus 200 outputs the content list to the mobile communication terminal.

Thus, a search method through a linkage relationship between the existing text-based search method and the content according to an embodiment of the present invention is shown in Table 1 below.

Existing text based search Search through linkage Search scope Search tag information extracted from title or body text Relationship between source content and linkage with mobile content Prioritization method The number of times text appeared, as of the most recent registration date Linkage directivity (connection level) and weight of each linkage relationship Search target Suitable for textual content-based searches Appropriate form in mobile environment based on multimedia contents such as photo, VOD, MOD

Referring to (Table 1), in the case of text-based search on the existing web, the search range is to search the content including the search word using the search tag information extracted from the title or body text, the searched information In the case of listing the list, in the prioritization method, the search list is output based on the number of times text is displayed on the website and the data or the date of the latest registration.

As such, the existing text-based search method is suitable for text-type search because effective search is possible in text-based content-based search.

Therefore, when using the search method through the content linkage relationship of the present invention, the search range is performed through the relationship between the source content and the linkage relationship with the mobile content, and the list of the retrieved information, the directness of the link in the priority determination method Priority is indicated according to (connection level) and weight of each linkage relationship, and a search list is output accordingly.

The search method through the content linkage relationship can be efficiently searched in a mobile environment focused on multimedia content such as photo, video on demand (VOD), and music on demand (MOD).

That is, in the conventional text-based search, only the primary information input by each content name or tag information can be searched, but the accurate results can be derived by searching through the relations and roles between the contents.

At this time, the search prioritization function through the content linkage relationship will be described based on the following (Table 2).

Search Start Content Linkage weight (role assignment) Source content Closing date Mobile content Content Service Start Date Relevance of search results Song Il Kook 100% (star) Jumong 2007-03-06 Jumong Episode 15 2006-08-15 1500 Jumong Episode 16 2006-08-22 1507 50% (Supporting) Hisense 2005-05-28 1 replay 2004-05-15 506 2 replays 2004-05-22 513

For example, when searching for the VOD content of 'MBC Jumong_6th_First View' which is mobile content as shown in Table 2 above, it is impossible to search by words other than Jumong. Therefore, in order to use the performer as a tag when searching for VOD content, the content search by performer name is possible only if all the performers of the relevant Jumong are input for each mobile content.

However, in the case of constructing and retrieving a metadata repository based on content linkage according to an embodiment of the present invention, the metadata of the source content called Jumong is received only once to store a connection relationship between the performer and Jumong, and the content is stored between Jumong and mobile content. By managing only the linkage relationship, if you look up the name of the performer (eg, Song Il-guk), you can see all Jumong contents related to Song-il-guk through the linkage of the second stage. In addition, it is possible to search for relevant and up-to-date contents by managing the connection weight between the broadcasting and performers called Jumong and the release date of the broadcasting.

5 is a block diagram illustrating a repository structure of mobile content metadata for linkage retrieval according to an embodiment of the present invention.

Referring to FIG. 5, the common metadata is extracted based on the original content metadata 310 of the existing content metadata (service metadata 505) stored and managed in each of the mobile content units 300. By setting the management separately, and sourcing the metadata in a manner such as external sourcing, such as to increase the quality of the metadata (reference metadata 500 separately management). In addition, by managing the linkage relationship with the source content unit 310 to have a structure that can minimize the overlap of metadata and efficiently manage the linkage relationship between the content.

That is, the source content unit 310 includes metadata 500 for reference, and separately manages music, music_album, broadcast, person, game, performance, cartoon, and movie data, and the mobile content unit 300. As a service metadata 505 manages a personal video (UCC), video on demand, karaoke, star pictorial, games, ringtones, curling, music data on demand. Also, the source content unit 310 and the mobile content unit 300 may search for associated content through the linkage unit 315 between the source content and the mobile unit linkage 520 that may indicate a linkage relationship in each of the contents. After checking the linkage relationship in each content, the link content relationship between the source content unit 310 and the mobile content unit 300 is confirmed through the mobile content / source content linking unit 305, and a search list is searched for the related contents by weight. Output

In this case, a function such as a linkage relationship and weighting of each content or the source content unit 110 and the mobile content unit 100 may be performed through the link_role unit 525.

The association_role 525 has all association relationships and weights for each association relationship, all associations are given an association_role, and each association_role has a standard weight, thereby giving an association weight. If necessary, the user can modify each link. In addition, the degree of association is set by giving a ratio according to the difference value between the base date of the content and the current date, and thus the degree of association is set based on the two reference values. On the contrary, as the reference level of the association is repeated, the default value for each level is negative, and as the number of circular references increases, the association becomes lower.

This may be represented by an algorithm for calculating the degree of association of the content search results as follows.

Algorithm for calculating the relevance of the contents search result = (association weighting + date association according to the difference between the current date and the broadcast date) * 1st reference meta linkage weight + (association weighting + date association according to the difference between the current date and the original release date * Secondary service meta weight + (association weighting + date association according to difference between current date and service start date) * Nth reference meta linkage weight-Default value by linkage level * Reference level

In addition, in order to accept various linkage relations and guarantee query performance, the common attributes and individual attributes of metadata for each content are separated, and individual attributes are stored and managed separately for each content type, and common attributes for association are designed to be managed as one. .

Examples of common attribute items may include content name, content creator, content description, content provider, content release date, content type, service URL, country classification, search tag, genre classification, and the like. In this case, examples of the individual items may be Korean title, English title, release date, production year, running time, homepage, rating, related movies, related broadcasting, and related music.

On the other hand, the source content unit 301 and the mobile content unit 300 by pre-set the classification according to the customer preferences, the source content unit 301 is a search method or association previously set by the user by the search genre and style, search terms, etc. Link the customer preference classification 510 that can perform a search through a relationship, and the like, and the mobile content unit 300 enables a user preference classification that enables a user to search a preset method by a search genre and a search term. ) Can be linked.

As such, the relationship between numerous contents and contents was set as the N: N relationship, and thus, it was not possible to manage the numerous relationships that occur many times.However, separate the original contents and the mobile contents separately and specify the connection relations based on the original contents. By minimizing the connection relationship by preventing duplication management and circular reference of the connection, it is possible to have a structure that can easily accommodate the relationship between any content by managing the relationship of the various content as a single table. In addition, by setting the role to be linked when setting the relationship between the content can be retrieved only the connection of the specific relationship can be improved the accuracy of the search.

Meanwhile, the repository structure of the mobile content metadata as shown in FIG. 5 may perform a content linkage search function based on a relational database management system (RDBMS).

It is designed to continuously find related contents through the ability to query the cyclic reference relation of Structured Query Language (SQL), so it can be searched using the existing DBMS engine without a separate search engine. It is possible to easily implement portability.

In addition, in the case of purchasing metadata from the outside, it is possible to service the purchased metadata itself, but it is difficult to utilize it through linkage with the existing content that is sold, whereas in the case of linkage-based content repository, the metadata purchased from the outside is used. By using only data to establish a linkage relationship, it is possible to increase the accuracy of the linkage relationship and increase its usability with the salable content.

That is, by purchasing person information, movie information, music information, and the like, the linkage relationship between each information and the linkage information between each information are included as linkage information in the designed repository, thereby enabling immediate extension and utilization of a mobile content search range.

For example, when purchasing music information, it is possible to perform a search extension using various metadata information purchased only through connection of actual service content such as ringtone, coloring, karaoke, and music related to music and music standard.

As described above, the present invention is for retrieving mobile content through the storage and management of the content metadata including the linkage function between the contents, and in particular, to design a content metadata repository for efficient retrieval when searching for multimedia content in a mobile environment. Then, the mobile content is searched based on the content metadata linkage relationship of the content metadata.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

As described above, the content retrieval method using the content metadata in the mobile communication system according to the present invention, by separately managing the source metadata independent of the individual mobile content for mobile content retrieval and by managing the linkage relationship between them, By minimizing the input of metadata and simplifying the complex linkage between contents based on the original contents, it is suitable for minimizing data storage space and having accurate and fast search results.

1 is a diagram illustrating a search method in a mobile communication system according to the prior art;

2 is a block diagram showing the structure of a search apparatus in a mobile communication system according to an embodiment of the present invention;

3 is a diagram illustrating a content retrieval method through a linkage relationship in a mobile communication system according to an embodiment of the present invention;

4 is a flowchart illustrating a search procedure in a mobile communication system according to an embodiment of the present invention;

5 is a block diagram illustrating a repository structure of mobile content metadata for linkage retrieval according to a preferred embodiment of the present invention.

<Explanation of Signs of Major Parts of Drawings>

300: mobile content 305: mobile content, source content connection

310: original content 315: link between original content

520: Linkage between mobile contents 525: Linkage_role

Claims (12)

When a content search is performed for a specific search term in order to search mobile content, the source metadata corresponding to the specific search term is searched among the source content including the reference metadata, and the preset metadata is connected to the preset metadata. Retrieving metadata, Searching for mobile metadata corresponding to the specific search term in the service metadata of the mobile content, and searching for metadata of a predetermined linkage relationship with the mobile metadata; Setting a priority using a preset linkage weight according to a linkage relationship between the source content and the data retrieved from the mobile content metadata; Outputting a search information list for mobile content according to the set priority; Content search method using content metadata in a mobile communication system comprising a. The method of claim 1, The linkage relationship is, When the metadata related to the specific search word exists, at least one of source content linked to the metadata, a relational role assignment, an association degree of a search result, and a linkage weight is assigned, and the table is classified by the specific search word. Content retrieval method using the content metadata in a mobile communication system characterized in that the setting. The method of claim 1, The method, Calculating a linkage relationship between the source content and data retrieved from the mobile content metadata, and setting priorities by assigning weights according to the linkage relationship to the mobile contents found through the calculated linkage relationship; Content search method using the content metadata in the mobile communication system further comprising. The method of claim 1, The metadata for reference of the source content, Content retrieval method using content metadata in a mobile communication system comprising at least one of music, music albums, broadcasting, people, games, performances, cartoons, movies. The method of claim 1, Metadata for the service of the mobile content, Method for retrieving content using content metadata in a mobile communication system comprising at least one of a personal video (UCC), video on demand, karaoke, star pictorial, games, ringtones, curling, music on demand. When the search request for a specific search word is received from a mobile communication terminal connected to a mobile communication network, the content metadata including the specific search word and the specific search word are searched to enable the mobile content to be searched based on a linkage relationship between the content metadata. A metadata repository that does not include a search term but stores metadata associated with the content metadata; A search engine that searches the mobile content for the specific search term by referring to the metadata repository. Content search apparatus using the content metadata in a mobile communication system comprising a. The method of claim 6, The linkage relationship is, When the metadata associated with the specific search word exists, at least one of source content, a relational role grant, an association degree of a search result, and an association weight associated with the metadata is provided, and the table is set for each specific search word. Content retrieval apparatus using the content metadata in a mobile communication system. The method of claim 6, The metadata repository, When performing a mobile content search for a specific search term, the source content unit for performing a search for the specific search term in the original content including search reference metadata; A source content linker that performs a search for the corresponding search word through a linkage relationship between the source content included in the source content unit, and provides the searched data to the source content unit; It includes metadata about the content used in the mobile based on the metadata for the service, retrieves the mobile content metadata corresponding to the search term requested, and retrieved from the searched mobile content and the relationships associated with the mobile content A mobile content unit for outputting content metadata; A mobile content linker that performs a search through a linkage relationship between mobile contents included in the mobile content unit and provides the searched metadata to the mobile content unit; A mobile content / source content linker which performs a search through a linkage relationship between the source content unit and the metadata of the mobile content unit and provides the searched metadata to the mobile content unit; Linkage_role for setting the priority of each searched content by assigning the linkage of the linkage units and the weight of each linkage relationship. Content search apparatus using the content metadata in a mobile communication system comprising a. The method of claim 8, The linked role unit, Calculating a linkage relationship between the source content and the data retrieved from the mobile content metadata, and setting the priority by assigning weights according to the linkage to the mobile contents searched through the calculated linkage relationship; Content retrieval apparatus using content metadata in a communication system. The method of claim 8, The mobile content unit, And outputting the searched content data list according to the priority set by the linking role unit. The method of claim 8, The metadata for reference of the source content, Content retrieval apparatus using the content metadata in a mobile communication system comprising at least one of music, music_album, broadcast, character, game, performance, cartoon, movie. The method of claim 8, Metadata for the service of the mobile content, Content retrieval apparatus using content metadata in a mobile communication system comprising at least one of a personal video (UCC), video on demand, karaoke, star pictorial, games, ringtones, curling, music on demand.

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