KR20050088699A - P2p server practical use apparatus and method in universal plug and play - Google Patents

Abstract

The present invention relates to a technology that enables richer media services by utilizing internal data of a P2P server in a UPnP media server. The present invention provides a CDS (100) for performing the media content information providing standard service used in the UPnP AV media server, and receives the relevant media information from the file sharing central server 220 for this purpose; When the CDS 100 requests a file sharing central server 220, the CDS 100 transmits search related request information such as a search string to the file sharing client module 130, and the file sharing client module 130 transmits the file sharing central server 220. A media information control unit 110 which receives the search result information received from the 220 and converts the search result information into a CDS search XML format and delivers the result to the CDS 100; A local information storage unit 120 for storing information managed by the CDS 100; The file sharing central server 220 and the external P2P server 230 is a part in charge of the communication is achieved by the file sharing client module unit 130 that serves as a client of the file sharing that does not use the UPnP protocol.

Description

 P2P SERVER PRACTICAL USE APPARATUS AND METHOD IN UNIVERSAL PLUG AND PLAY}

The present invention relates to a technology that utilizes internal data of a P2P server in a UPnP media server. In particular, the present invention extends a media server supporting a limited media service in a home network to search for data located in a P2P server and store data in a local repository. The present invention relates to a device and method for utilizing a P2P server of a UPnP media server to enable a richer media service.

UPnP (Universal Plug and Play) MediaServer (UPnP) MediaServer (Median) provides a service that can show and play the media content owned by the MediaRenderer (MediaRenderer). The advantage of UPnP media server over non-UPnP server is that it supports automatic discovery and standardized protocol using UPnP protocol. Except for the basic feature that easy setting such as automatic discovery is possible, there is not much advantage in terms of content providing ability. Functionally, media files from other servers can be transferred, but within the limited area of home networks, their utilization is extremely limited compared to the Internet, and data can be obtained from the Internet, but the specific scenarios are quite passive or can be used for non-UPnP factors. Dependency is strong

As such, in the conventional UPnP media server, its utilization is extremely limited within the limited area of the home network, and the process of acquiring data from the Internet is highly passive or highly dependent on non-UPnP factors, making rich media services impossible. There was a fault.

Accordingly, an object of the present invention is to expand the UPnP AV media server supporting limited media services in the home network so that the data located in the P2P server can be searched and the search results can be stored in the local storage. Is to make it possible.

In the information retrieval processing process of the file-sharing central server according to the present invention, CDS receives a search action and transmits relevant search request information to the media information controller, and interprets the search request information received by the media information controller to file necessary information. Transmitting to a search client unit in the shared client module unit; A second step of the search client unit requesting a specific file sharing central server for information retrieval and transmitting a search result received from the file sharing central server to a media information controller; A third step of analyzing the search result received by the media information controller to extract information necessary for the CDS search response, converting the information into a CDS search response format, and transmitting the information to the CDS; And a fourth step in which the CDS creates a container having a predetermined title and stores the contents of the search result under the CDS.

In the process of receiving a file from the P2P server according to the present invention, if the CDS examines the corresponding transport protocol of the import resource action or the pattern, and the desired source is found to be the data in the P2P server, the related information is transmitted to the media information controller. The media information control unit may include: a first step of extracting necessary information from the file sharing client module unit and transmitting the necessary information to the transmission client unit in the file sharing client module unit; Requesting the P2P server to transmit the information to the P2P server, and transmitting the media information from the P2P server; And transmitting the media information received from the delivery client unit to the CDS through the media information controller, and moving the received file from the temporarily stored location to the location associated with the specific container.

1 is a block diagram showing an embodiment of an apparatus for utilizing a P2P server of a PnP media server according to the present invention. As shown in FIG. 1, a media content information providing standard service used by the UPnP AV media server 200 is performed. To this end, the CDS 100 for receiving the relevant media information from the file-sharing central server 220; When the CDS 100 requests an inquiry to the file sharing central server 220, the search related request information such as a search string is transmitted to the search client unit 131 in the file sharing client module 130, and the search client unit 131. A media information control unit 110 for converting the search result information received from the file sharing central server 220 into the CDS search XML format by the internal XML conversion unit 111 and transferring the search result information to the CDS 100; A local information storage unit 120 for storing information managed by the CDS 100; A file sharing client module serving as a file sharing client that does not use the UPnP protocol as a part in charge of communication with the file sharing central server 220 and an external P2P server 230 and processes authentication procedures when necessary. It will be described in detail with reference to Figures 2 to 5 attached to the operation of the present invention configured as described above, which is configured as described above.

Compared to the classic client-server network model, in P2P, each node is both a client and a server. This allows not only to get information from other sources, but also to share information with other sources. P2P can be divided into pure P2P and P2P with a search server in the middle. The pure P2P method is a method of directly searching for another peer without a central search server. However, there is a disadvantage in that the number of peers that can be searched is relatively small and a limitation occurs. In contrast, the peer-to-peer approach with a search server in the middle downloads a list of other peers currently participating in the network through a central server and uses them for content queries. In case of using a central server, various architectures are possible. The central server is used only for peer registration, and actual content queries are requested from individual P2Ps. The central server manages not only the list of peers but also the content list of the peer. There is a way that Curie is made through a central server, or a central server is managed by uploading peer registration information, content query, and even the content itself. In the embodiment of the present invention, the central server is responsible for the peer list and content query, and the actual data exchange will be described in a manner made through individual P2P. When using another method, the basic method proposed by the present invention is applied as it is.

First, the operation of each part in the media server 200 according to the present invention will be described with reference to FIGS. 1 and 2.

The CDS (Content Directory Service) 100 is a standard service for providing media content information used by the UPnP AV media server 200. A new container, such as "RemoteSearchRoot", separate from the container derived from the existing root to specify where to store the information obtained from the file share central server 220, is stored under the root as shown in FIG. To generate. Basically, "RemoteSearchRoot" is a special container having no internal items, and dynamically obtains media information from the file sharing central server 220 using a mechanism through a search action for the container.

If "ABCD" is used as a search keyword, a new container with a title of "ABCD" is created as a child container under "RemoteSearchRoot" and the search result is displayed inside the container. The same result is sent to the response to the first search action. Once a search has created a container for search results and a list of child items, you can view existing results simply by using a browse action. Otherwise, if the same search action is repeated again, the existing result is updated through the above-described process.

The media information control unit 110 receives the search related request information such as a search string from the CDS 100 when the CDS 100 requests an inquiry from the CDS 100 to the file sharing central server 220, and then searches the client in the file sharing client module 130. Transfer to section 131. In addition, the search client unit 131 converts the search result information received from the file sharing central server 220 to the CDS search XML format by the internal XML conversion unit 111 and delivers the search result information to the CDS 100.

Subsequently, when attempting to download the file of the P2P server 230 through the CreateObject action and the ImportResource action in the actual CDS 100, the target file URI of the action is not in the HTTP-GET format. In this case, direct file copying between the CDS 100 and the corresponding P2P server 230 is not possible. In this case, the CDS 100 requests the media information control unit 110 to transmit information, and the media information control unit 110 transfers the information back to the transmission client unit 132 in the file sharing client module unit 130. The transmission client unit 132 also performs the role of delivering the real time progress information to the CDS 100 when the actual file is downloaded. When the search client unit 131 receives the search result requested by the file sharing central server 220 and transmits the search result to the media information control unit 110, the search result is converted by the XML conversion unit 111 in the media information control unit 110. It is responsible for converting to XML format for CDS search response format.

The file sharing client module 130 is responsible for communication with the actual external file sharing central server 220 and the external P2P server 230 and serves as a client of a file sharing that does not use the UPnP protocol. The file sharing client module unit 130 uses a protocol matching the desired file sharing central server 220 and the P2P server 230. If necessary, the file sharing client module unit 130 also processes the authentication process with the file sharing central server 220 and the P2P server 230.

Internally, the search client unit 131 and the transmission client unit 132 are classified. The search client unit 131 transfers a specific search keyword to the file sharing central server 220 and the file sharing central server 220. ) Notifies the search client unit 131 of the search result again. The search result is transmitted to the media information control unit 110 and then processed into a predetermined form and finally delivered to the CDS 100. The transmission client unit 132 establishes a connection with the P2P server 230 where the corresponding data is located and plays a role of downloading the data.

In general, since the data download method of the P2P server 230 does not use a web standard method of HTTP-GET, the data of the P2P server 230 cannot be downloaded directly from the CDS 100. In the process of downloading the data, the transmission client unit 132 may receive the request of the CDS 100 and transmit the current status information, or may stop the current transmission in response to the transmission stop request. The actual local information storage unit (DB) 120 may be located at the same physical location as the information storage unit managed by the CDS 100, and thus the specific path may be different. When the transmission is completed, the CDS 100 moves the received file to a specific location managed by the CDS 100 so that a related file may appear later in a browse action.

Meanwhile, the information retrieval process for the file sharing central server 220 will be described in detail with reference to FIG. 4 as follows.

The current CDS 100 is an example in which a specific container for searching a material in the file sharing central server 220 is created under a root container with a title similar to "RemoteSearchRoot". At this time, the CDS 100 manages the ObjectID corresponding to "RemoteSearchRoot" separately and requires different processing from other general containers.

If the search action for the "RemoteSearchRoot" has not been performed yet, if a browse action is requested from the control point 210 for the corresponding container, no item is included.

The control point 210 delivers a search action for a keyword to be searched for in the "RemoteSearchRoot" container. When the CDS 100 receives the search action, the CDS 100 examines the corresponding container ID, and if a request is received with an ID corresponding to "RemoteSearchRoot", the CDS 100 exits from an existing routine and returns relevant search request information to the media information control unit 110. Will be transmitted to (S401).

In this case, search search within the search action (SearchCriteria) has a slight limitation, unlike the general use, and can selectively use only the type supported by the file sharing central server 220 for the search and ignore the rest of the search criteria. For example, a commonly used format may be "dc: title contains" ABCD "". The media information control unit 110 analyzes the received request information and delivers necessary information to the search client unit 131 in the file sharing client module unit 130 (S402).

Accordingly, the search client unit 131 requests a search to a specific file sharing central server 220 that it already knows (S403).

The file sharing central server 220 transmits the search result obtained from the internal database DB to the search client unit 131 again, and the search client unit 131 transmits the search result to the media information control unit 110. (S404)

Therefore, the media information control unit 110 analyzes the search result and extracts information necessary for the CDS search response, converts the information into a CDS search response format through the XML conversion unit 111 therein, and finally the CDS ( 100) (S405, S406).

The CDS 100 transmits a result corresponding to the response of the search action to the control point 210. In addition, if the original search purpose was a request to search for files containing "ABCD" in the file name, create a new container with the title "ABCD" under the "RemoteSearchRoot" container, and insert the search result contents below it. (S407) (see FIG. 3).

Depending on the implementation method, this operation may be stored in a specific format on the database (DB), table, or memory currently used by the CDS 100 (S408).

Once the information is stored through the above process, the above search action result is shown to be the same as the local browser action result through the general browser action. In addition, when the updated information is desired, the updated search action may be obtained by transmitting the same search action as the first time.

If you later want to remove the search results, you can take a DestroyObject action on the container named "ABCD" in the example above. In addition, when the media server 200 is driven or when the program item is removed when all of the container items under "RemoteSearchRoot" are removed, the existing search results may be processed so as not to remain.

Meanwhile, a process of transmitting a file from the P2P server 230 will be described in detail with reference to FIG. 5.

When the control point 210 wants to copy an item belonging to a specific container that exists under the "RemoteSearchRoot" container to a specific local container outside the "RemoteSearchRoot", the crate object action and the import resource action on the CDS 100 are used.

The control point 210 does not care whether the item to be copied is a file in the local 120 or a file in the P2P server 230. Therefore, the request is made in the same manner as a general file transfer method.

When the crate object action is transmitted from the control point 210 to the CDS 100, the item information to be copied is copied to a specific local container. This process is not very different from the general process.

Subsequently, when a file transfer request is requested from the control point 210 through an import sort action, the CDS 100 examines a corresponding transmission protocol of SourceURI of the import resource action or examines a pattern of DestnationURI so that the location of a desired source is P2P. It is determined whether the data in the server 230.

If it is determined that the data is in the P2P server 230, the file related information is transmitted to the media information controller 110, and the media information controller 110 extracts the necessary information from the file sharing client module 130 and the file sharing client. It is sent to the transmitting client unit 132 in the module unit 130. (S501, S502)

Accordingly, the transmission client unit 132 actually makes a transmission request to the corresponding P2P server 230, and the resulting media transmission is also received through the transmission client unit 132 (S503, S506).

At this time, the transmission client unit 132 is stored through the file system 120 used for the CDS (100). During the transfer, the CDS 100 may receive actions such as GetTransferProgress and StopTransferResource from the control point 210. If the CDS 100 determines that the TransferID is related to P2P transmission, the CDS 100 may receive media. The information control unit 110 requests related information.

The media information control unit 110 processes the request and sends the request to the transmission client unit 132. The transmission client unit 132 informs the current transmission status information when the request is related to the get transfer progress and stops the transfer progress. If the request is related, the current transmission process is suspended (S505).

If the transmission process is successfully completed, the transmission client unit 132 transmits the fact and related information to the CDS 100 through the media information control unit 110. Then, in the CDS 100, the file transfer process is completed by moving the received file from a temporarily stored location to a location associated with a specific container managed by the CDS 100. (S507)

Through this process, if necessary, after the file transfer is completed, the "importURI" related information in the <res> tag may be removed from the received item information (S508).

As described in detail above, the present invention enables UPnP media servers to utilize media materials in P2P servers irrelevant to the UPnP protocol and located on the Internet rather than the home network, so that UPnP media servers can acquire more rich media materials. As a result, various and rich media services are possible.

1 is a block diagram of a P2P server utilization apparatus of a PnP media server according to the present invention.

2 is a configuration diagram of an entire network environment to which the present invention is applied.

3 is a CDS structure diagram of a media server.

4 is a signal flow diagram illustrating a search process of a file sharing central server according to the present invention.

5 is a signal flow diagram illustrating a file transfer process from a P2P server according to the present invention.

*** Description of the symbols for the main parts of the drawings ***

100: CDS 110: media information control unit

120: local information storage unit 130: file sharing client module unit

200: media server 210: control point

220: file sharing central server 230: P2P server

Claims (6)

A CDS 100 for performing a media content information providing standard service used by the UPnP AV media server, and receiving related media information from the file sharing central server 220; When the CDS 100 requests a file sharing central server 220, the CDS 100 transmits search related request information such as a search string to the file sharing client module 130, and the file sharing client module 130 transmits the file sharing central server 220. A media information control unit 110 which receives the search result information received from the 220, converts the search result information into a CDS search XML format, and then transfers the search result information to the CDS 100; A local information storage unit 120 for storing information managed by the CDS 100; The file sharing central server 220 and the external P2P server 230 as a part that is responsible for the communication of the file sharing client module unit 130 that plays a role of a file sharing client that does not use the UPnP protocol P2P server utilization device of the UPnP media server. The method of claim 1, wherein the CDS 100 is configured to create a new container under the root separate from the container derived from the existing root to specify where to store the information obtained from the file sharing central server 220. A device utilizing a P2P server of a UPnP media server. The apparatus of claim 1, wherein the media information control unit (110) is configured to deliver real-time progress information to the CDS (100) when the actual file is downloaded. The file sharing client module unit 130 transmits a specific search keyword to the file sharing central server 220, receives the search result of the file sharing central server 220, and processes it into a predetermined form. A search client unit 131 for transmitting to the CDS 100; Device for utilizing a P2P server of the UPnP media server, characterized in that it comprises a transmission client unit 132 to connect to the P2P server 230 where the corresponding material is located and performs the role of downloading the data. Receiving a search action by the CDS and transmitting the relevant search request information to the media information control unit, the media information control unit interpreting the information and delivering necessary information to the search client unit in the file sharing client module unit; Transmitting a search result received from the search client unit to a media information controller after requesting a specific file sharing central server to search for information; A third step of analyzing the search result received by the media information control unit, extracting information required for a CDS search response, converting the information into a CDS search response format, and delivering the information to the CDS; A method of utilizing a P2P server of a UPnP media server, wherein the CDS performs an information retrieval process of a file sharing central server through a fourth step of creating a container having a predetermined title and storing contents of a search result under the CDS; . If the CDS examines the corresponding transport protocol of the import resource action or examines the pattern, and the location of the desired source is identified as the data in the P2P server, the CDS delivers the relevant information to the media information control unit, which is required by the file sharing client module unit. Extracting information and transmitting the extracted information to a transmission client unit in the file sharing client module unit; Requesting the P2P server to transmit the information to the P2P server, and transmitting the media information from the P2P server; The media information received from the delivery client unit is transferred to the CDS through the media information controller, and the CDS moves the file from the temporarily stored location to a location related to a specific container and stores the file from the P2P server through a third step. Method of utilizing a P2P server of the UPnP media server, characterized in that for performing the process of receiving the transmission.