KR100743055B1 - Search method for search inside fire-wall, and system for enabling the method - Google Patents

Abstract

The present invention relates to a P2P retrieval method and a P2P retrieval system that allow retrieval of data held in other communication terminals regardless of whether or not a firewall exists in response to a retrieval request from a communication terminal in a specific firewall. According to an embodiment of the present invention, a P2P search method for searching in a firewall may include: transmitting a request for collecting information for collecting information regarding one or more second communication terminals accessing a server from a first communication terminal to the server; And transmitting access terminal information generated in response to the request for collecting the information from the server to the first communication terminal, and transmitting the second communication terminal outside the firewall depending on whether the firewall is present in the first communication terminal. Identifying as a terminal or a terminal in a firewall; identifying, by the first communication terminal, a terminal in a homogeneous firewall among the terminals in the firewall; and transmitting a search request from the first communication terminal to a terminal in the same firewall. And transmitting a search result according to the search request from the terminal in the same firewall to the first communication terminal. And that is characterized. According to the present invention, there is provided a P2P retrieval method and a P2P retrieval system that dramatically increase the number of communication terminals that can share data by allowing retrieval and access to terminals in a firewall, which are not allowed in the conventional P2P scheme. There is an advantage to this.

P2P, data exchange, network address, firewall

Description

P2P search method and P2P search system for searching in a firewall {PC2 SEARCH METHOD FOR SEARCH INSIDE FIRE-WALL, AND SYSTEM FOR ENABLING THE METHOD}

1 is a view for explaining a schematic view of a system structure driven under the control of a P2P retrieval system of the present invention.

2 is a block diagram showing a P2P search system according to an embodiment of the present invention.

3 is a view for explaining an example of transmitting a connection and a search request between a plurality of communication terminals by the P2P search system according to the present invention.

4 is a flowchart illustrating a P2P search method according to an embodiment of the present invention in detail.

5 is a flowchart illustrating a P2P search method according to another embodiment of the present invention in detail.

<Explanation of symbols for the main parts of the drawings>

200: P2P retrieval system 210: information collection means

220: search means 221: disconnection terminal notification means

222: relay terminal management means 223: data transmission means

224: search request transmission means 225: search result generation means

230: connection control means

The present invention relates to a P2P retrieval method and a P2P retrieval system for enabling a retrieval of a communication terminal in a firewall that has previously been impossible for a company or an individual who wants to provide a P2P retrieval service through the Internet. In particular, the present invention relates to a P2P retrieval method and a P2P retrieval system that allows retrieval of data held in other communication terminals regardless of whether or not a firewall exists in response to a retrieval request from a communication terminal in a specific firewall.

Peer-to-peer (P2P) refers to a technology of sharing a person-to-person file on the Internet, and directly connects personal communication terminals such as PCs to mutually search for data held by each communication terminal to perform data exchange. The technique can be collectively called.

General P2P can be broadly divided into a method of realizing a connection between communication terminals via a server and a method of directly connecting without involvement of a server using information such as an IP address known in advance between the communication terminals.

First, a method of realizing a connection via a server is used in, for example, a P2P program such as a napster or a sound sea, and there is an advantage in that a large amount of shared data can be retrieved from a plurality of communication terminals connected to the server. However, the method using the server connects a plurality of communication terminals to a common server, and a server may be overloaded to process a plurality of signal processing required by these communication terminals in one server. There may also be concerns that the processing speed of the chip may be reduced.

In addition, the direct connection method is used to exchange data between individual communication terminals is used in P2P programs such as Gnutella (Gnutella), and can overcome the problem of speed degradation due to server load without passing through the server. However, a communication terminal connected to one communication terminal is limited, and furthermore, if the communication terminal is not connected, a problem may occur that a search for data held by the communication terminal is impossible.

In order to solve the problems of the conventional P2P program, in recent years, the number of communication terminals to be connected is reduced to reduce the load on the server, and for example, P2P which expands the number of communication terminals that can be searched using connection history information such as a tag. The program is emerging and is in service.

However, the improvement of P2P programs that can limit the number of accessing communication terminals or expand the range of searched communication terminals, solves the difficulty of searching and accessing communication terminals in a firewall that are commonly used in recent years. I can't.

Therefore, there is an urgent need for a new P2P retrieval model that enables flexible search and access to communication terminals with firewall protection, as well as communication terminals without firewall protection, regardless of whether or not a firewall exists. Also, for a search request from a communication terminal in a firewall, a P2P search model capable of freely searching and processing data of a communication terminal in a firewall of the same attribute and a communication terminal in a firewall of another attribute is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the number of communication terminals capable of sharing data can be dramatically increased by allowing search and access to terminals in the firewall, which are not allowed in the conventional P2P scheme. An object of the present invention is to provide a P2P search method and a P2P search system.

In addition, the present invention, even if the communication terminal making the search request does not make a direct connection with the terminal in the firewall, using the data of the terminal in the firewall, which is held in the terminal outside the firewall by data exchange, performs a search process for the terminal in the firewall. It is an object of the present invention to provide a P2P retrieval method and a P2P retrieval system.

In addition, an object of the present invention is to provide a P2P search method and a P2P search system that can directly search and access the terminal in the firewall in the same firewall as the communication terminal making the search request without passing through other communication terminals. do.

In addition, the present invention is a P2P search method that can select a communication terminal that can be freely connected to other communication terminal as a relay terminal, and perform the search and access to the terminal in the firewall using the selected relay terminal and It is an object to provide a P2P retrieval system.

The present invention also provides a P2P retrieval method and a P2P retrieval system capable of freely searching and retrieving data of a communication terminal in a firewall of the same attribute and a communication terminal in a firewall of another attribute, even for a search request from a communication terminal in the firewall. The purpose is to provide.

According to an embodiment of the present invention for achieving the above object, the P2P search method for searching in the firewall, the information collection request for the collection of information related to one or more second communication terminal accessing the server from the first communication terminal Transmitting to the first communication terminal the connection terminal information generated in response to the request for collecting the information from the server, and the first communication terminal according to whether the firewall is present. Identifying a communication terminal as a terminal outside the firewall or a terminal inside the firewall, identifying a terminal within the same firewall among the terminals within the firewall at the first communication terminal, and transmitting the terminal from the first communication terminal to the terminal within the same firewall. Transmitting a search request, and a search result according to the search request at a terminal in the same firewall; Characterized in that it comprises the step of transmitting to.

Further, as a technical configuration for achieving the above object, a P2P retrieval system for retrieval in a firewall includes information collecting means and retrieving means, wherein the information collecting means comprises at least one agent connected to the server at the first communication terminal. 2 transmits an information collection request for collecting information related to the communication terminal to the server, and accesses the terminal information including information on whether or not a firewall exists for the second communication terminal in response to the information collection request. Generate and control the transmission to the first communication terminal, wherein the search means (1) identifies the second communication terminal as a terminal outside the firewall or a terminal within the firewall according to whether the firewall is present in the first communication terminal, 2) end of a homogeneous firewall within the same firewall as the first communication terminal among the terminals in the firewall at the first communication terminal; Confirms the message, (3) the first communication terminal transmits a search request to the terminal in the same firewall, and (4) the terminal in the same firewall transmits the search result according to the search request to the first communication terminal. It characterized in that the control to.

Hereinafter, a P2P search method and a P2P search system for searching in a firewall will be described with reference to the accompanying drawings.

The term "non-firewall terminal" and "terminal in the firewall" continuously used in the present specification are to name each of a plurality of communication terminals connected to the network according to the presence or absence of firewall protection, and the terminal other than the firewall is a firewall without firewall protection. The communication terminal outside, the terminal in the firewall may mean a communication terminal in the firewall with firewall protection. In particular, the first communication terminal according to the present invention is a communication terminal that generates a search request for data exchange with another communication terminal (second communication terminal) according to a P2P scheme, and will be described as being limited to a terminal in a firewall having a firewall protection. . The second communication terminal receiving the search request from the first communication terminal may be classified into a terminal outside the firewall or a terminal within the firewall, depending on whether the firewall is protected.

1 is a view for explaining a schematic view of a system structure driven under the control of a P2P retrieval system of the present invention.

The P2P retrieval system 100 has a system structure for establishing a connection connection path with a plurality of communication terminals by a P2P method and for exchanging data between communication terminals via the established connection connection path. In addition, the P2P retrieval system 100 transmits a retrieval request for the data exchange in a different manner based on whether or not a firewall protects each communication terminal.

First, the first communication terminal 110 connects to the second communication terminal 130 classified as a terminal outside the firewall by a P2P method, and transmits a predetermined search request to the connected second communication terminal 130 to perform the search. A device that receives a search result for a request. In addition, even if the first communication terminal 110 is in a firewall and cannot be connected to the second communication terminal 140 classified as a terminal in the firewall, the first communication terminal 110 indirectly makes a search request through a server or a terminal outside the firewall that is connected to the terminal in the firewall. Can be sent to receive the search results. In particular, the first communication terminal 110 may be a terminal in the firewall in the firewall, and among the second communication terminals 140 classified as terminals in the firewall, the terminal in the firewall in the same firewall as the first communication terminal 110 ( Hereinafter, the "terminal in the same firewall" may be configured to make a direct connection without passing through other communication terminals. In order to generate / transmit a connection request and a search request with another communication terminal based on the P2P scheme, a predetermined application for exchanging data in the P2P scheme may be driven in the first communication terminal 110.

The server 120 connects a plurality of communication terminals (including first and second communication terminals) that want to search or exchange data by P2P scheme, and predetermined services (eg, newly uploaded) related to P2P scheme data exchange. A service for posting data, a service for finding a network location of a communication terminal holding specific data, and the like. For example, the server 120 registers a user of each communication terminal as a member under a predetermined contract, and permits sharing in the communication terminal of the user registered as a member to a predetermined notification area. You can post. In addition, when the posted specific data is selected by the user of any communication terminal connected to the server 120, the server 120 connects the communication terminal holding the data with the user's communication terminal to communicate with the user. In the terminal, the data selected by the user may be downloaded.

In particular, the server 120 selects at least one of the second communication terminals classified as non-firewall terminals as relay terminals, and it is difficult to directly transmit a search request by the first communication terminal 110 using the selected relay terminal. Search processing for the second communication terminal classified as a terminal in the firewall may be performed. Here, since the relay terminal is a non-firewall terminal outside the firewall, the connection with other communication terminals is relatively free and can hold data (shared data) of other communication terminals through the connection.

The second communication terminals 130 and 140 receive a predetermined search request from the first communication terminal 110, generate a search result in response to the received search request, and transmit the same to the first communication terminal 110. to be. The search request includes a search word input from a user of the first communication terminal 110, and the second communication terminals 130 and 140 extract data corresponding to the search word from data that allows the exchange of data to be a search result. Can be generated. In particular, the second communication terminals 130 and 140 may be classified into a second communication terminal 130 (hereinafter referred to as a non-firewall terminal) classified as a non-firewall terminal and a second communication terminal 140 classified into a terminal within the firewall according to whether the firewall is present. Or hereinafter referred to as a terminal within a firewall). In addition, the terminal 140 in the firewall having a special attribute among the terminal 140 in the firewall may be specifically named as a terminal in the same firewall or a terminal in a non-connected firewall. Hereinafter, the types of the second communication terminals and the definitions for each type will be briefly described.

1) Terminal outside the firewall: A second communication terminal outside the firewall and free to transmit a connection and search request from the first communication terminal 110.

1-1) Relay terminal: Any non-firewall terminal selected by the server 120.

2) Terminal in the firewall: The second communication terminal in the firewall, the transmission of the connection and search request from the first communication terminal 110 is limited.

2-1) Terminals in the same firewall: Terminals in the firewall in the same firewall as the first communication terminal (110).

2-2) Terminals in a non-connected firewall: Terminals in a firewall that are not terminals in the same firewall or that do not connect with terminals outside the firewall.

In addition, the second communication terminals 130 and 140 may include data of another communication terminal through which data is exchanged. That is, the second communication terminals 130 and 140 may include not only their own data list allowing sharing, but also data lists of other communication terminals currently connected and sharing. Accordingly, the P2P retrieval system 100 of the present invention allows the non-firewall terminal 130 to be freely connected to the terminal 140 in the firewall that is not directly connected to the first communication terminal 110 due to the firewall. By using the data of the terminal 140 in the firewall can be retrieved.

The P2P retrieval system 100 can perform a P2P retrieval process not only for the non-firewall terminal 130 but also for the terminal 140 in the firewall, regardless of the presence or absence of a firewall. Free exchange of data may be possible.

Hereinafter, a detailed configuration of the P2P retrieval system 200 according to the present invention will be described with reference to FIG. 2. 2 is a block diagram showing a P2P search system 200 according to an embodiment of the present invention.

The P2P retrieval system 200 of the present invention includes information collecting means 210 for collecting information of a communication terminal connected to the server 120, retrieving means 220 for obtaining a search result by a P2P method, and a communication terminal. It may include a connection control means 230 for controlling the connection between.

The information collecting means 210 collects information about the communication terminals (first and second communication terminals 130 and 140) currently connected to the server 120, and collects information from the first communication terminal 110 in the firewall. In response to the request for collecting information, the terminal 120 transmits access terminal information generated in the server 120 to the first communication terminal 110. In this case, the information collection request is generated whenever the application related to P2P is first run in the first communication terminal 110 or each time a predetermined period has elapsed after the initial startup of the application. Can be sent to. In addition, the access terminal information generated by the server 120 may include various information about the second communication terminals 130 and 140 currently accessing the server 120 in response to the information collection request. For example, the access terminal information may include whether the firewall of the second communication terminal (130, 140), network address information of the second communication terminal (130, 140), etc., accordingly, the P2P search system 200 of the present invention The second communication terminal 130 and 140 may be classified into a terminal outside the firewall 130 or a terminal 140 inside the firewall in consideration of the firewall. In addition, the P2P retrieval system 200 of the present invention may specify the location on the network of the second communication terminal (130, 140) to be transmitted later in consideration of the network address information.

That is, the information collecting means 210 requests the information collection request for collecting the information related to one or more second communication terminals 130 and 140 connected to the server 120 from the first communication terminal 110 to the server 120. To the first communication terminal 110 by generating access terminal information including information on whether or not a firewall exists for the second communication terminals 130 and 140 and network address information in response to the information collection request received from the server 120. Control to send). Accordingly, the first communication terminal 110 is located on the network for the second communication terminal (130, 140) connecting to the server 120, and each of the second communication terminal (130, 140) outside the firewall terminal ( 130 or the terminal 140 within the firewall may be identified.

The search unit 220 identifies the second communication terminals 130 and 140 as the terminal 130 outside the firewall or the terminal 140 in the firewall using the access terminal information in the first communication terminal 110, and the identified firewall Among the terminals 140, the terminal in the same firewall in the same firewall as the first communication terminal 110 is identified. That is, the retrieval means 220 determines the second communication terminals 130 and 140 to which the search request from the first communication terminal 110 can be directly transmitted without passing through any communication terminal. In the example, it is possible to determine a terminal in a homogeneous firewall having no restriction on connection with the first communication terminal 110 in the same firewall as the non-firewall terminal 130 and the first communication terminal 110 outside the firewall. Here, for example, the search request may be generated in association with a user inputting an arbitrary search word by a user of the first communication terminal 110 on an application related to P2P driven in the first communication terminal 110.

In addition, the search means 220 transmits a search request from the first communication terminal 110 to the determined out-of-firewall terminal 130 and the terminal in the same firewall, and the terminal out of the firewall 130 and the terminal in the same firewall. The search result generated in response to the search request is transmitted to the first communication terminal 110.

Accordingly, according to the P2P search system 200 of the present invention, whether or not the firewall of the second communication terminal (130, 140) that can be directly transmitted by the search request generated in the first communication terminal 110 in the firewall or the first It can be determined accurately in consideration of the firewall identity with the communication terminal 110.

In addition, the search unit 220 checks the non-firewall terminal 130 for exchanging data by connecting to the terminal 140 in the firewall among the non-firewall terminals 130 which directly transmit the search request, and checks the identified non-firewall terminal ( Search processing for the data (shared data) of the terminal 140 in the firewall held in 130 may be performed. That is, the search unit 220 transmits a search request including a search word from the first communication terminal 110 to the non-firewall terminal 130 among the second communication terminals 130 and 140, and then, from the non-firewall terminal 130. Data corresponding to a search word may be extracted from the data of the non-firewall terminal 130 or the data of the terminal 140 in the firewall connected to the non-firewall terminal 130 as a search result. In this case, the data of the terminal 140 inside the firewall held by the terminal outside the firewall 130 may be exchanged between the data shared with the terminal 130 outside the firewall, that is, between the terminal 130 outside the firewall and the terminal 140 inside the firewall. It may be data made.

Accordingly, according to the present invention, the search processing can be performed not only for the terminal outside the firewall 130 but also for the terminal 140 inside the firewall that is connected to the terminal outside the firewall 130 by one transmission of the search request.

In addition, the search unit 220 may select an arbitrary relay terminal, and perform a search process for a portion of the terminal 140 in the firewall using the selected relay terminal.

To this end, the retrieving means 220 uses the connectionless terminal notification means 221, the relay terminal management means 222, the data transmission means 223, the search request transmission means 224, and the search result generating means 225. It may include.

First, the connectionless terminal notification means 221 notifies the server 120 of the terminal in the connectionless firewall among the terminals 140 in the firewall in the first communication terminal 110. Herein, the terminal in the non-connection firewall is defined as the terminal in the firewall 140 that is not the terminal in the same firewall or does not connect with the terminal 130 outside the firewall as described above. That is, the connectionless terminal notifying means 221 recognizes the terminal 140 in the firewall, which cannot directly transmit the search request from the first communication terminal 110, as the terminal in the connectionless firewall, and recognizes the information related thereto. ) Is notified.

The relay terminal managing means 222 selects at least one non-firewall terminal among the non-firewall terminals 130 as a relay terminal in the server 120, and uses the network address of the selected relay terminal as the terminal in the non-connection firewall and the first communication. Transmission to the terminal 110. That is, the relay terminal management means 222 selects a relay terminal that acts as a connection to a terminal in the connectionless firewall or a connection with the first communication terminal 110, and deselects the selected result together with the network of the relay terminal. It transmits to the terminal in the access firewall and the first communication terminal (110). The selection of such a relay terminal is because the transmission and connection of a direct search request between both the terminal in the non-connection firewall and the first communication terminal 110 are restricted by the firewall, so that the terminal in the non-connection firewall and the first communication terminal 110 are restricted. This is because it is necessary to connect using any communication terminal that can be freely connected without restriction of the firewall.

That is, the relay terminal management means 222 of the present invention is for performing the management or control process for the relay terminal selected by the server 120, the first communication terminal 110 for the information on the selected relay terminal ) And notify the terminal in the connectionless firewall. The server 120 receives information about the terminal in the non-connection firewall from the first communication terminal 110, and receives the information on the relay terminal under the control of the relay terminal management means 222 and the terminal in the non-connection firewall. 1 may notify the communication terminal 110.

Subsequently, the terminal in the non-connection firewall may access the relay terminal and transmit the data or the sharing list about the data to the relay terminal. Here, the shared list may mean a list enumerating brief information about the data, and for example, information about the name, size, creation date, etc. of data held by the terminal in the connectionless firewall from the terminal in the connectionless firewall may be used. Can be collected and generated.

 After the first communication terminal 110 accesses the relay terminal and searches for the information desired by the data or shared list of the terminal in the connectionless firewall maintained in the relay terminal, the first communication terminal 110 checks whether the terminal in the connectionless firewall is connected to the relay terminal. You can download the data.

In this case, the relay terminal serves as a relay for transmitting data of the terminal in the non-connection firewall to the first communication terminal 110. In addition, the relay terminal may receive a packet or a file from the terminal in the connectionless firewall and transmit the packet or file to the first communication terminal 110, and the transmission of the packet or data to the first communication terminal 110 may be performed. When complete, you can delete unnecessary resources (packets, data).

The data transmission means 223 uses the network address in the terminal in the non-connection firewall to transmit a sharing list about the data owned by the user or the data held by the terminal to the relay terminal. That is, the data transmission means 223 allows data exchange between the terminal in the connectionless firewall and the relay terminal so that data (shared data) of the terminal in the connectionless firewall is retained in the relay terminal. In addition, the data transmission terminal 223 may allow a sharing list regarding data held by the terminal in the non-connection firewall to be transmitted from the terminal in the non-connection firewall to the relay terminal.

The search request transmission means 224 transmits a search request from the first communication terminal 110 to the relay terminal using the network address. That is, the search request transmission means 224 serves to transmit a search request to the relay terminal in the firewall. The search request may include a search word input by a user of the first communication terminal 110 and a network address of the first communication terminal.

The search result generating means 225 transmits the search result according to the search request from the relay terminal to the first communication terminal 110. That is, the search result generating means 225 extracts data corresponding to the search word included in the search request from the data of the terminal in the non-connection firewall held in the relay terminal, generates a search result, and converts the generated search result into the search request. It serves to transmit to the first communication terminal 110 using the network address of the first communication terminal included. In addition, the search result generating means 225 may extract a list corresponding to the search word from the shared list of the terminals in the non-access firewall maintained in the relay terminal and generate the search result. That is, the search result generating means 225 identifies the data of the terminal in the disconnected firewall associated with the extracted list, and allows the identified data to be transmitted to the first communication terminal 110 through the relay terminal.

The connection control unit 230 controls the connection between the first communication terminal 110 and the second communication terminal (130, 140) to establish a connection connection path for data exchange by the P2P method. That is, when the access control means 230 is the terminal outside the firewall 130 and the terminal within the same firewall among the second communication terminals 130 and 140, the first communication terminal 110 and the terminal outside the firewall 130 or the same firewall are used. Allow my terminal to connect directly without passing through other communication terminals. In addition, when the second communication terminal (130, 140) is the terminal 140 in the firewall that is connected to the terminal outside the firewall 130, the access control means 230, the terminal outside the firewall 140 is connected to the terminal The first communication terminal 110 is connected via the 130. In addition, when the second communication terminal (130, 140) is a terminal in the non-connection firewall, the connection control means 230 is the first terminal in the connectionless firewall via the relay terminal selected from the terminal 130 other than the firewall; To be connected to the communication terminal 110.

Accordingly, according to the present embodiment, it is possible to transmit a search request from the first communication terminal to any second communication terminals 130 and 140 to be searched by the P2P method regardless of the presence or absence of a firewall. Search processing for the terminal 140 in the firewall can be performed without restriction.

3 is a view for explaining an example of transmitting a connection and a search request between a plurality of communication terminals by the P2P search system according to the present invention.

In FIG. 3, a peer-to-peer search request is generated in Peer 5, which is a terminal within a firewall.

First, the P2P retrieval system 200 makes a request for collecting information from Peer 5 to obtain information about the second communication terminals 130 and 140 (Peer 1 to 4 and Peer 6 to Peer 8) connected to the server 120. Send to server 120. The server 120 receiving the request for collecting the information generates access terminal information about Peers 1 to 4 and Peer 6 to Peer 8 that are currently connected to the server 120, and transmits it to Peer 5. As described above, the access terminal information includes firewall information and network address information for Peers 1 to 4 and Peer 6 to Peer 8, and after receiving the access terminal information, the P2P retrieval system 200 determines a specific Peer. Can identify whether it is a terminal outside the firewall or a terminal inside the firewall, and can also identify a peer to send a search request directly or indirectly.

First, in step 1) of FIG. 3, the P2P retrieval system 200 is located outside the firewall and searches with Peer 2 (Peer 1, 3, 4 are also the same) identified as the non-firewall terminal 130 without access restriction by the firewall. Send the request. That is, the P2P retrieval system 200 directly connects Peer 5 to Peer 2 without firewall protection, extracts data corresponding to the search request from the data held in Peer 2, and transmits it to Peer 5.

In step 2) of FIG. 3, the P2P search system 200 transmits a search request to Peer 6 (a terminal in the same firewall) protected by the same firewall as Peer 5 although in the firewall. That is, the P2P retrieval system 200 identifies Peer 6 that recognizes signal processing with Peer 5 as internal processing in one firewall, connects Peer 5 and Peer 6, and responds to a search request among data held in Peer 6 Extracts the data and sends it to Peer 5.

In step 3) of FIG. 3, the P2P retrieval system 200 identifies peers that are connected to Peer 6 to Peer 8, which are terminals within the firewall, to exchange data among Peer 1 to Peer 4, which are terminals outside the firewall. Through identification, the P2P retrieval system 200 may identify Peer 4 that connects to Peer 8 under the conditions as shown in FIG. 3. That is, data exchange is performed between Peer 4 and Peer 8, and Peer 4 may retain shared Peer 8 data. Accordingly, the P2P retrieval system 200 extracts data corresponding to the retrieval request from the data of Peer 8 held in Peer 4 and transmits the data to Peer 5.

In step 4) of FIG. 3, the P2P retrieval system 200 transmits information about Peer 7, which is a connectionless firewall terminal, from the Peer 5 to the server 120, and collects data of the Peer 7 from the server 120. Control to select any relay terminal. That is, the P2P retrieval system 200 selects Peer 1, which Peer 7, which is a connectionless firewall terminal free to connect, as a relay terminal, and notifies Peer 5 and Peer 7 that Peer 1 is selected as a relay terminal, respectively. Then, the P2P retrieval system 200 controls the exchange of data with Peer 7 and Peer 1 so that Peer 1's data (shared data) is retained in Peer 1, and in response to a retrieval request from Peer 5, It is possible to control so that a search process for the data of Peer 7 is performed.

Accordingly, the P2P retrieval system 200 of the present invention enables free access to not only Peer outside the firewall but also to Peers (Peer 6 to Peer 9) in the firewall where the connection is restricted. The effect of securing a lot of peers can be obtained.

The workflow of the P2P retrieval system 200 according to the present invention having such a configuration will be described in detail.

First, as an embodiment of the present invention, the P2P search method for the terminal outside the firewall 130 and the terminal within the same firewall that the search request from the first communication terminal 110 is transmitted directly without passing through other communication terminals. Explain.

4 is a flowchart illustrating a P2P search method according to an embodiment of the present invention in detail.

First, the P2P retrieval system 200 requests the server 120 to collect information for collecting information related to one or more second communication terminals 130 and 140 connected to the server 120 from the first communication terminal 110. It transmits to (S410). This step (S410) is the first communication to obtain information about whether the firewall protection for the second communication terminal (130, 140) currently connected to the server 120 or the network location of the second communication terminal (130, 140) The terminal 110 generates a request for collecting information and transmits it to the server 120. The time point at which the information collection request is generated can be flexibly set by the operator of the present system. For example, when the application related to the P2P search is first run in the first communication terminal 110 or a predetermined period after the application is run, This may be the case.

In addition, the P2P retrieval system 200 transmits the access terminal information generated in response to the information collection request from the server 120 to the first communication terminal 110 (S420). This step (S420) is a process of providing information related to the second communication terminals 130 and 140 currently connected to the server 120 to the first communication terminal 110 that generated the information collection request. Here, the access terminal information includes whether the firewall for the second communication terminal (130, 140) and the network address information, so that the P2P search system 200 has a firewall protection of each of the second communication terminal (130, 140) It is possible to identify whether the terminal 130 outside the firewall or the terminal 140 in the firewall with the firewall protection, and the location on the network of the second communication terminal (130, 140) to send a search request.

Next, the P2P retrieval system 200 identifies the second communication terminals 130 and 140 as the non-firewall terminal 130 or the terminal 140 in the firewall according to whether the first communication terminal 110 is a firewall (S430). ). This step (S430) is a process of classifying a terminal outside the firewall among the second communication terminals 130 and 140 as the terminal outside the firewall 130 and the terminal within the firewall as the terminal 140 inside the firewall.

In addition, the P2P retrieval system 200 checks the terminal in the firewall of the same kind among the terminals 140 in the firewall in the first communication terminal 110 (S440). This step (S440) is a process of recognizing the terminal in the firewall (peer 6 of FIG. 3) in the same firewall as the first communication terminal 110 among the terminal 140 in the firewall. That is, the P2P retrieval system 200 in this step (S440) checks the terminal 140 in the firewall included in the same network as the first communication terminal 110 among the communication terminals grouped into an independent network by one firewall. do.

Subsequently, the P2P retrieval system 200 transmits a search request from the first communication terminal 110 to a terminal within the same firewall, and receives a search result according to the search request from the terminal within the same firewall receiving the search request. Transmit to 110 (S450). The search request may include a search word and network address information of the first communication terminal 110. In this step (S450), the P2P search system 200 may search for data corresponding to the search word among data held in the terminal of the same firewall. The extracted data is transmitted to the first communication terminal 110 of the network address information.

Therefore, according to the present invention, it is possible to connect to a communication terminal in a firewall that has not been previously connected, thereby obtaining an effect of further expanding the range of the search target.

In addition, the P2P retrieval system 200 of the present invention can transmit a search request to the non-firewall terminal 130, which is free of access because there is no restriction on the firewall, and the predetermined search result is transmitted from the first communication terminal 110 accordingly. Can be controlled to receive.

Hereinafter, as another embodiment of the present invention, a P2P search method for performing a search for the terminal 140 in the firewall in the non-firewall terminal 130 for exchanging data by connecting to the terminal 140 in the firewall.

Performing a search process for the data of the terminal 140 in the firewall by using the terminal 140 outside the firewall connected to the terminal 140 in the firewall, the search result according to the search request in the above example, It may be further included in the step S450 to transmit to the communication terminal 110.

The P2P retrieval system 200 performs a retrieval process for the shared data when the shared data by exchanging data with another communication terminal (terminal 140 in the firewall) is held in the terminal 130 outside the firewall that transmitted the retrieval request. That is, the P2P retrieval system 200 may be configured to, among the data of the terminal 140 inside the firewall 140 connected to the terminal outside the firewall, together with the data of the terminal 130 outside the firewall, from the terminal 130 outside the firewall. Data corresponding to the search word may be extracted as a search result, and then the P2P search system 200 transmits the extracted search result to the first communication terminal 110.

Therefore, according to the present invention, even if the first communication terminal 110 does not make a direct connection with the terminal 140 in the firewall, the data of the terminal 140 in the firewall 140 retained in the terminal 130 outside the firewall by data exchange. You can perform a search for.

Hereinafter, an example of a P2P search method for performing the search of the terminal 140 in the firewall using the relay terminal in the search processing for the terminal 140 in the firewall will be described with reference to FIG. 5.

5 is a flowchart illustrating a P2P search method according to another embodiment of the present invention in detail.

First, the P2P retrieval system 200 transmits an information collection request to the server 120, and transmits access terminal information corresponding thereto to the first communication terminal 110, and access terminal information in the first communication terminal 110. The second communication terminal (130, 140) is classified into a terminal outside the firewall 130 and the terminal 140 in the firewall by using (S510). This step (S510) is substantially similar or the same process as the above-described step (S410) to step (S430), detailed description thereof will be omitted.

In addition, the P2P retrieval system 200 notifies the server 120 of the terminal in the non-connection firewall among the terminals in the firewall 140 in the first communication terminal 110 (S520). This step (S520) is a terminal in the firewall 140 that is not in the same firewall as the first communication terminal 110, and does not connect to the terminal 130 other than the firewall (peer 7 of Fig. 3) Is determined, and the related information (network address of the terminal in the non-access firewall) is transmitted to the server 120.

Next, the P2P retrieval system 200 selects at least one non-firewall terminal 130 among the non-firewall terminals 130 as a relay terminal in the server 120, and selects a network address of the selected relay terminal in the non-connection firewall. Transmission to the terminal (S530). This step (S530) is a process of notifying the terminal in the non-connection firewall from the server 120 selecting the relay terminal, and subsequently transmits the network address of the relay terminal connected to the terminal in the non-connection firewall. In particular, in the step S530, the P2P retrieval system 200 transmits the network address of the relay terminal to the first communication terminal 110 so that the identification of the network location of the relay terminal to which the retrieval request will be transmitted is first communicated. It is to be made accurately in the terminal (110).

In addition, the P2P retrieval system 200 transmits data held by the P2P retrieval system 200 to the relay terminal using the network address at the terminal in the non-access firewall (S540). This step (S540) is a process of connecting the terminal in the non-connection firewall and the relay terminal, and the data exchange between each other, so that the data (shared data) of the terminal in the non-connection firewall is retained in the relay terminal.

Subsequently, the P2P search system 200 transmits a search request to the relay terminal using the network address of the relay terminal, and transmits a search result according to the search request to the first communication terminal (S550). This step (S550) is a process of extracting the data corresponding to the search word from the data of the terminal in the non-connection firewall held in the relay terminal and receiving the search result to the first communication terminal 110.

Accordingly, according to the present invention, the number of communication terminals capable of sharing data is dramatically increased by allowing a search from the first communication terminal 110 to the terminal 140 in the firewall, which was not possible in the conventional P2P scheme. You can.

Embodiments of the present invention described above may be implemented individually by embodiment, or a plurality of embodiments may be implemented together in conjunction. For example, the P2P retrieval system 200 of the present invention may perform a retrieval process for a terminal in a homogeneous firewall, and simultaneously operate a retrieval process for a terminal in a non-connected firewall using a relay terminal.

In addition, the P2P retrieval system 200 of the present invention uses a connection connection path for data exchange between the first communication terminal 110 and the second communication terminal (130, 140), whether there is a firewall of each communication terminal or between the communication terminal Can be set considering the connection type.

First, the P2P retrieval system 200 is different from those of the second communication terminals 130 and 140 with respect to the terminal outside the firewall without the firewall protection and the terminal within the same firewall as the first communication terminal 110. The connection connection path with the first communication terminal 110 is established without passing through the communication terminal.

Also, for the terminal 140 inside the firewall that is connected to the terminal outside the firewall 140 among the terminal 140 inside the firewall, the P2P retrieval system 200 is connected to the first communication terminal via the terminal outside the firewall 130 that is connected. The connection path between the 110 and the terminal 140 in the firewall may be controlled.

In addition, the P2P retrieval system 200 establishes a connection path between the selected relay terminal and the terminal in the connectionless firewall among the terminals in the firewall 140 among the connectionless firewall 140, and further communicates with the relay terminal and the first communication. By setting the connection connection with the terminal 110, an indirect connection connection path using the relay terminal may be established between the first communication terminal 110 and the terminal in the non-connection firewall. That is, the P2P retrieval system 200 is a relay terminal that is a non-firewall terminal that can freely connect with a communication terminal. The P2P retrieval system 200 connects the terminal in the non-connection firewall and the first communication terminal 110 to establish an access connection path between them. You can get it.

Therefore, according to the present invention, the connection path between the first communication terminal 110 and all communication terminals can be set flexibly regardless of the presence of a firewall.

Embodiments of the invention include a computer readable medium containing program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, magnetic-optical media such as floppy disks, and ROM, RAM, flash memory, and the like. Hardware devices specifically configured to store and execute the same program instructions are included. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

While specific embodiments of the present invention have been described so far, 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 claims below, but also by those equivalent to the claims.

As can be seen from the above description, according to the present invention, P2P dramatically increases the number of communication terminals that can share data by allowing search and access to terminals in the firewall, which are not allowed in the conventional P2P scheme. A search method and a P2P search system can be provided.

According to the present invention, even if the communication terminal making the search request does not make a direct connection with the terminal in the firewall, the terminal performs the search processing using the data of the terminal in the firewall held by the terminal outside the firewall by data exchange. A P2P retrieval method and a P2P retrieval system can be provided.

According to the present invention, it is possible to provide a P2P search method and a P2P search system that can directly search and access a terminal in a firewall that is in the same firewall as a communication terminal making a search request without passing through another communication terminal. .

According to the present invention, a P2P search method for selecting a communication terminal that can be freely connected to other communication terminals as a relay terminal, and performing a search and access to terminals in the firewall using the selected relay terminal; A P2P search system can be provided.

According to the present invention, a P2P retrieval method and a P2P retrieval system capable of freely searching and processing data of a communication terminal in a firewall of the same attribute and a communication terminal in a firewall of another attribute, even for a search request from a communication terminal in the firewall. Can be provided.

Claims (12)

In the P2P search method for searching in the firewall, Transmitting from the terminal in the first firewall to the server an information collection request for collecting information relating to one or more communication terminals accessing the server; In response to the request for collecting the information, transmitting access terminal information including information on whether a firewall is present from the server to a terminal in a first firewall; Using the received access terminal information at the terminal in the first firewall, (1) the communication terminal is identified as the terminal outside the firewall and the second firewall terminal, and (2) the second terminal among the identified non-firewall terminals. Recognizing a terminal outside the firewall in which data is exchanged with the terminal in the firewall; Transmitting a search request from the terminal in the first firewall to the recognized non-firewall terminal; And Extracting data corresponding to the search request from among the data of the terminal in the second firewall held in the terminal outside the recognized firewall as a search result according to the search request, and transmitting the extracted data to the terminal in the first firewall; P2P search method comprising a. The method of claim 1, Identifying the communication terminal in the same firewall as the terminal in the first firewall using the received access terminal information in the terminal in the first firewall; Transmitting a search request from the terminal in the first firewall to the identified communication terminal; And Extracting data corresponding to the search request from the data held in the identified communication terminal as a search result according to the search request, and transmitting the extracted data to the terminal in the first firewall; P2P search method characterized in that it further comprises. The method of claim 1, Transmitting a search request from a terminal in the first firewall to an arbitrary non-firewall terminal among the non-firewall terminals; And Extracting data corresponding to the search request from the data held in the terminal outside the firewall as a search result according to the search request, and transmitting the extracted data to the terminal in the first firewall; P2P search method characterized in that it further comprises. delete delete The method of claim 1, The search request includes a predetermined search word and a network address of a terminal in the first firewall. The extracting of the data corresponding to the search request as a search result according to the search request and transmitting the data to the terminal in the first firewall, Extracting data associated with the search word from the data of the terminal in the second firewall held in the terminal outside the recognized firewall, and transmitting the extracted data using the network address of the terminal in the first firewall; P2P search method comprising a. delete delete delete A computer-readable recording medium for recording a program for executing the method of any one of claims 1, 2, 3 and 6 on a computer. In a P2P search system for searching in a firewall, Means for collecting information and retrieving means, The information collecting means, An information collection request for collecting information relating to one or more communication terminals connecting to a server is transmitted from a terminal in a first firewall to the server and includes information on whether or not a firewall exists as a response to the information collection request. Transmitting terminal information from the server to a terminal in a first firewall, The search means, Using the received access terminal information at the terminal in the first firewall, (1) the communication terminal is identified as the terminal outside the firewall and the second firewall terminal, and (2) the second terminal among the identified non-firewall terminals. Recognizes the non-firewall terminal that exchanges data with the terminal in the firewall, transmits a search request from the terminal in the first firewall to the recognized non-firewall terminal, and the terminal in the second firewall held in the recognized non-firewall terminal P2P search system, characterized in that the data corresponding to the search request is extracted as a search result according to the search request and transmitted to the terminal in the first firewall. The method of claim 11, The search means, Using the received access terminal information at the terminal in the first firewall, a communication terminal in the same firewall as the terminal in the first firewall is identified, and a search request is made from the terminal in the first firewall to the identified communication terminal. And extracting data corresponding to the search request from the data held in the identified communication terminal as a search result according to the search request and transmitting the extracted data to the terminal in the first firewall.

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