KR20110016525A - Communication apparatus and control method thereof, p2p server system and control method thereof - Google Patents

Abstract

PURPOSE: A communication apparatus, a P2P server system, and a control method thereof are provided to actively change the connection between each communication terminal and relaying server by the network status. CONSTITUTION: A communication terminal management server(110) stores the communications terminal information transmitted from each communications terminal when the server is connected to each communication terminal for the first time. The communications terminal management server receives a connection request to a certain destination communications terminal(200'') from a certain request terminal(200') of a plurality of communications terminals. The communications terminal management server performs call connection between the connection requesting terminal, and the call receiving terminal in one of the direct connection and indirect connection by the pre-stored call receiving terminal information.

Description

Communication terminal and its control method, P2P server system and its control method {COMMUNICATION APPARATUS AND CONTROL METHOD THEREOF, P2P SERVER SYSTEM AND CONTROL METHOD THEREOF}

The present invention relates to a communication terminal and a control method thereof, a P2P server system and a control method thereof, and more particularly, a communication terminal and a control method for registering network state information determined at the time of execution to a P2P server system, and a communication method. The present invention relates to a P2P server system comprising a server supporting P2P communication between terminals and a control method thereof.

In general, communication terminals form a communication channel with a counterpart communication terminal in various ways to transmit and receive predetermined data, and among them, a widely used method is a P2P (PEER-TO-PEER) communication method.

In other words, since centralized management of predetermined data in one server system causes a lot of inefficiency in terms of network load and equipment operation, data are distributed to each communication terminal so that each communication terminal can communicate with each other. The P2P communication method is to receive data directly from the terminal.

To this end, the addresses on the network of each communication terminal need to be managed by the P2P server system, and each communication terminal checks the network address of the counterpart communication terminal in the corresponding P2P server system in order to receive certain data from other communication terminals. It is possible to request transmission of data by connecting to the counterpart communication terminal using the network address.

This is because the P2P server system intervenes in the initial connection process, and the process of transmitting and receiving actual data is performed between communication terminals, so that network load is distributed and resource efficiency is increased.

However, depending on the circumstances of the communication terminal, there is a case where a direct connection cannot be made between the communication terminals. For example, if a specific communication terminal has a private IP and the network to which the communication terminal belongs does not port forward an external connection to the communication terminal, the communication terminal having the private IP is directly connected to another communication terminal. You will not be able to provide certain data.

To this end, in a P2P server system, a predetermined relay server is provided, for example, a connection is established between communication terminals with a private IP, and data can be transmitted and received between each other.

In this case, the communication between the communication terminals via the relay server may also be referred to as P2P communication because the data is actually transmitted and received between the communication terminals.

However, the relay server also has a limited resource, but if the connection between the communication terminal through the relay server is excessively generated, there has been a problem that the P2P communication relay between each communication terminal is not properly performed.

On the other hand, as described above, in the case of controlling the communication connection between the communication terminals through the relay server, that is, the determination that determines whether to control the direct connection between the communication terminals or indirect connection through the relay server is a P2P server Only by the system. However, such a simple function may cause a large load on the P2P server system when there are connection requests of many communication terminals at the same time, and the improvement is desired.

The present invention has been made to solve the above-mentioned problems and to meet the demands of the prior art, the object of which is to establish a connection between each communication terminal and the relay server according to the network situation when the P2P connection is made through the relay server between each communication terminal The present invention provides a P2P server system including a relay server capable of actively converting and a control method thereof.

It is another object of the present invention to check whether each communication terminal can be directly connected to a counterpart communication terminal or to be connected through a predetermined relay server in P2P communication with other communication terminals so as to register itself in the P2P server system. It is to provide a communication terminal and a control method thereof.

In order to achieve the above object, a control method of a P2P server system for controlling a connection between a plurality of communication terminals performing peer-to-peer communication according to the present invention includes: each communication among the plurality of communication terminals; Storing communication terminal information transmitted from the corresponding communication terminal at the time of first connection with the terminal; When a connection request is received from a predetermined request communication terminal among the plurality of communication terminals to a predetermined destination communication terminal, the connection between the request communication terminal and the destination communication terminal is directly connected according to the stored destination communication terminal information. And controlling to be made by any one of indirect connection through a predetermined relay process.

In addition, a peer-to-peer (P2P) server system for performing peer-to-peer (P2P) communication with other communication terminals in a manner that does not go through or without the relay server according to the present invention to achieve the above object. A control method of a communication terminal for registering its information includes storing network-related setting data; Storing a connection type selection criterion for determining a communication connection type; Activating a P2P communication function for performing P2P communication with another communication terminal; At the time when the P2P communication function is activated, communication is performed via the relay server whether direct communication is possible when performing P2P communication with the other communication terminal by comparing the stored network-related setting data and the connection type selection criteria stored in the storage unit. Determining whether or not to; And registering the communication terminal information including the determined determination result in the P2P server system.

In addition, a P2P server system for controlling a connection between a plurality of communication terminals for performing peer-to-peer (P2P) communication in accordance with the present invention to achieve the above object, P2P communication between the plurality of communication terminals A relay server for relaying; Stores communication terminal information transmitted from each communication terminal at the time of first connection with each communication terminal among a plurality of communication terminals, and connects from a predetermined request communication terminal to a predetermined destination communication terminal among the plurality of communication terminals. Upon receiving the request, the communication terminal controlling the connection between the request communication terminal and the destination communication terminal to be made by one of a direct connection and an indirect connection through a predetermined relay process according to previously stored destination communication terminal information. It is configured to include a management server.

In addition, a peer-to-peer (P2P) server system for performing peer-to-peer (P2P) communication with other communication terminals in a manner that does not go through or without the relay server according to the present invention to achieve the above object. The communication terminal for registering its information includes a setting storage unit for storing network-related setting data; A P2P communication unit performing P2P communication with an external communication terminal; And a execution controller configured to execute the P2P communication unit, wherein the P2P communication unit includes: a storage unit storing connection type selection criteria for determining a communication connection type; When the P2P communication unit is executed by the execution control unit, direct communication is performed when performing P2P communication with another communication terminal by comparing network-related setting data stored in the setting storage unit with a connection type selection criterion stored in the storage unit. A communication method determination unit determining whether communication is possible via the relay server or not; And a terminal information registration unit that registers communication terminal information including the determination result determined by the communication method determination unit in the P2P server system.

As described above, according to the present invention, each communication terminal knows in advance whether P2P communication is possible for P2P communication between communication terminals or indirect connection through a predetermined relay server, and registers them in the P2P server system. When the connection request from the communication terminal to the other to reduce the load for determining the connection method of the P2P server system, the connection can be made quickly.

In addition, when P2P communication is performed between communication terminals through a relay server, the connection method between the relay server and each communication terminal may be actively changed according to a network situation, so that user satisfaction and quick use of server resources may be achieved. Maximize.

That is, when the load of the relay server is light, the connection between the relay server and each communication terminal is maintained, and when there is a request for connection from one communication terminal to another communication terminal, the communication between the communication terminals is rapidly performed through the continued connection. This can be achieved by increasing the user satisfaction according to the fast connection, and if the load of the relay server is heavy, the connection between some or all communication terminals and the relay server can be connected non-persistently, only intermittently, more communication terminals Can be connected to other communication terminals via a relay server.

In particular, the determination of whether the connection between the relay server and each communication terminal is continuous or intermittent is made in consideration of the P2P communication usage of each terminal and the user of the terminal, so that a substantial benefit can be provided to customers with high P2P communication usage. have.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

P2P communication system according to an embodiment of the present invention is composed of each communication terminal 200 and the P2P server system 100 as shown in FIG.

The communication terminal 200 is a terminal that performs P2P communication with the counterpart communication terminal 200. Each communication terminal 200 is a personal mobile wireless communication device such as a mobile phone, a personal digital assistant (PDA), a predetermined display device as well as a computer. Includes all set-top boxes and the like connected to.

In this embodiment, the communication terminal 200 is divided into a request communication terminal 200 ′ and a destination communication terminal 200 ″ for convenience.

The request communication terminal 200 'is a terminal for requesting predetermined data from the counterpart communication terminal 200 through P2P communication, and the destination communication terminal 200 "is a target for which the request communication terminal 200' requests data. This is the terminal.

The communication terminal 200 may perform P2P communication with the counterpart communication terminal 200 directly or through the relay server 130 as described later, and further, relay processing of P2P communication between other communication terminals 200. It can also be done. Of course, for the P2P communication relay process between the other communication terminals 200, it is preferable that the communication terminal 200 should have a public IP address.

The communication terminals 200 need to access the P2P server system 100 and request information of the counterpart communication terminal 200 in order to perform P2P communication with the counterpart communication terminal 200. ) Must first register their information in the P2P server system 100. This is because other communication terminals 200 can access them.

In the present embodiment, the request communication terminal 200 'is a wireless communication device such as a mobile phone, and the destination communication terminal 200 "is configured as a computer as an example. However, the communication terminals 200 are not limited thereto.

An example of a functional block of the communication terminal 200 is shown in FIG. 2.

As shown in the figure, the communication terminal 200 includes a setting storage unit 220, a P2P communication unit 230, and an execution control unit 210.

The configuration storage unit 220 stores network-related configuration data. For example, a predetermined IP address essential for network communication may be included in network-related configuration data.

The P2P communication unit 230 performs a function of performing P2P communication with another external communication terminal. That is, the communication terminal 200 may include various functions, and the P2P communication unit 230 performs a function of performing P2P communication with an external communication terminal.

For example, when the communication terminal 200 is the mobile communication terminal 200, the P2P communication unit 230 has a function of connecting with a specific P2P server system 100 according to a user's menu selection, and receives from the P2P server system 100. Based on the information of the counterpart communication terminal 200, all the functions of connecting to the counterpart communication terminal 200 may be performed.

The execution control unit 210 performs a function of executing the P2P communication unit 230 described above.

For example, when a user who wants P2P communication inputs a P2P communication command through an input unit (not shown), the execution control unit 210 executes the P2P communication unit 230, and at this time, an address of a predetermined P2P server system 100 is input. The P2P communication unit 230 may transmit the P2P communication unit 230.

The P2P communication unit 230 may include a storage unit 231, a communication method determination unit 233, and a terminal information registration unit 235.

Here, the storage unit 231 stores the connection type selection criteria for determining the communication connection type.

When the P2P communication unit 230 is executed by the execution control unit 210, the communication method determination unit 233 selects network-related setting data stored in the setting storage unit 220 and connection type selection criteria stored in the storage unit 231. By comparing this, it is determined whether direct communication is possible or not through the relay server 130 when performing P2P communication with another terminal.

For example, when the connection type selection criteria stored in the storage unit 231 includes IP address band-specific information, and the setting storage unit 220 registers and stores an IP address corresponding to a private IP band, a communication method. The determination unit 233 may determine that communication should be performed via the relay server 130 when communicating with other terminals.

The terminal information registration unit 235 transmits and registers terminal information including the determination result determined by the communication method determination unit 233 to the P2P server system 100. The terminal information may further include an IP address and a gateway address assigned to the communication terminal 200 as well as the determination result determined by the communication method determination unit 233.

By such a configuration, for example, when connecting to the P2P server for the first time after the power is supplied to the communication terminal 200, the communication terminal 200 determines the communication connection method with the other communication terminal 200 directly determined by itself. The P2P server system 100 may be registered in advance, which means that the P2P server system 100 does not need to determine whether each communication terminal 200 can directly connect with another communication terminal. Can reduce the load, and furthermore, the connection for P2P communication between the communication terminals 200 can be made quickly. A more detailed description thereof will be provided later.

The P2P server system 100 may include a communication terminal management server 110, a meta information generating server 120, and a relay server 130.

The communication terminal management server 110 stores the terminal information transmitted from the communication terminal 200 at the time of connection with each communication terminal 200, and receives a connection request from one communication terminal to another communication terminal. In this case, according to the stored terminal information, the connection between the terminals 200 is controlled by either one of a direct connection and an indirect connection through the relay server 130.

That is, the terminal information received from each communication terminal 200 may include determination information on whether the corresponding communication terminal 200 can be directly connected to another communication terminal or indirectly through the relay server 130. In accordance with the determination information, the communication terminal management server 110 may control a connection method in P2P communication between each communication terminal 200.

As another example, the terminal information received from each communication terminal 200 includes only the IP address information of each communication terminal 200, and the like as in the above example. Is not included), the communication terminal management server 110 transmits a dummy connection signal to the IP address of the communication terminal 200, and the communication terminal 200 of the communication terminal 200 for the dummy connection signal. According to the response, the corresponding communication terminal 200 may determine whether direct connection with another communication terminal 200 is possible during P2P communication, and may include the result of the determination in the communication terminal information of the corresponding communication terminal 200.

Here, the dummy connection signal is a signal transmitted by the communication terminal 200 to confirm in advance whether the communication terminal 200 can directly respond to the request of the other communication terminal 200, and the corresponding communication terminal 200 responds to the dummy connection signal. If not, the communication terminal management server 110 determines that the communication terminal 200 cannot be directly connected to another communication terminal 200 as an intended terminal, but indirectly connected through the relay server 130.

The result of the determination is included together with the communication terminal information and stored, and the communication terminal management server 110 uses the stored communication terminal information to directly communicate with the communication terminal through either of the direct connection or the indirect connection through the relay server 130. Control the communication connection between the two.

Of course, in the above-described embodiment, the communication terminal management server 110 is connected to each communication terminal 200 only when the communication terminal information received from the communication terminal 200 does not include the determination information about the direct connection and the indirect connection. Although transmitting the dummy connection as an example, even if the communication terminal information includes the determination information related to the P2P communication connection, the communication terminal management server 110 transmits a dummy connection signal to each communication terminal 200 for confirmation. Of course you can.

The meta information generation server 120 stores rule information for setting a communication connection policy between the relay server 130 and the communication terminals 200, and collects P2P communication logs of each communication terminal 200. It performs a function of generating meta information including the user level for each communication terminal 200 based on the collected communication log.

Here, the communication connection policy is necessary to determine how each communication terminal 200 will be connected with the relay server 130, and as described later, the relay server 130 may communicate with each communication terminal 200 according to the established communication connection policy. Set the communication connection type. A more detailed description thereof will be described later.

Rule information including data for setting such a communication connection policy may be set by the administrator and stored in the meta information generation server 120. To this end, the meta information generation server 120 may be provided with an interface for receiving input from the administrator.

The P2P communication log collected by the meta-information generating server 120 provides a predetermined data to the other communication terminal 200 and how often each user of the communication terminal 200 or the corresponding user of the communication terminal 200 used the P2P communication. Information about how many times the predetermined data is requested to the other communication terminal 200. To this end, the meta information generation server 120 may receive necessary information from various devices included in the present embodiment.

The meta information generation server 120 generates meta information using the collected P2P communication logs. The meta information includes, for example, a grade according to P2P communication usage for each user (or terminal).

As described below, the meta information may provide a differential benefit (benefits for a connection method) to a user (or terminal) performing P2P communication according to a superior customer. A more detailed description thereof will be described later.

Meanwhile, the relay server 130 performs a function of relaying P2P communication between the communication terminals 200. For example, when the direct connection between the communication terminals 200 is impossible or difficult, the relay server 130 may correspond to the relay server 130. The signal is relayed to enable P2P communication between the communication terminals 200.

At this time, the relay server 130 and each communication terminal 200 may maintain a connection form in various ways, such a connection form includes a continuous connection form in which the communication terminal 200 and the relay server 130 continuously maintain the connection. In addition, the communication terminal 200 may include a periodic connection form in which the communication server 200 periodically maintains the connection by transmitting a polling signal to the relay server 130.

That is, the relay server 130 may store the information once connected to the predetermined communication terminal 200 to maintain the connection state (for example, continue to store socket information for the connection), and other communication terminals. The connection can be maintained only when the corresponding communication terminal 200 transmits a polling signal periodically confirming the connection.

As such, the relay server 130 determines how the relay server 130 maintains the connection type with each communication terminal 200 by a predetermined communication connection policy.

A process of establishing a communication connection policy and determining a communication connection type according to the following will be described below.

The relay server 130 receives rule information and meta information from the meta information generation server 120, and the load state of the relay server 130 between the communication terminals 200, that is, the P2P communication status through the relay server 130. Extracts and sets a communication connection policy corresponding to the received rule information from the received rule information and based on the user class of each communication terminal 200 included in the received meta information and the set communication connection policy. Set communication connection type with.

That is, as described above, the rule information may include a plurality of communication connection policies according to the processing load of the relay server 130, that is, the relay throughput between the communication terminals 200 processed by the relay server 130. The relay server 130 extracts and sets a communication connection policy corresponding to its own relay processing load from the rule information, and determines a connection type with each communication terminal 200 according to the set communication connection policy.

Here, each communication connection policy included in the rule information defines a connection type according to the user class.

Accordingly, the relay server 130 extracts a user class for each communication terminal 200 (or a user thereof) from the meta information received from the meta information generation server 120, and according to the extracted class, each communication terminal 200. ) Determines the communication connection type based on the communication connection policy extracted from the rule information.

However, as described above, the relay server 130 may set another communication connection policy according to a change in the load (that is, throughput) of the relay server 130, and as the other communication connection policy is set, the relay server 130 may be different from the relay server 130. The communication connection type with each communication terminal 200 may be changed.

The relay server 130 performs a P2P communication connection between the communication terminals 200 according to the communication connection type as follows.

First, assuming that the relay server 130 and the destination communication terminal 200 "maintain a continuous connection form, the relay server 130 stores and stores communication connection information with the destination communication terminal 200". In the state, when the request communication terminal 200 'transmits a connection request signal to the destination communication terminal 200 "to the relay server 130, the relay server 130 has already received the connection request of the request communication terminal 200'. Transmit using a communication channel with the destination communication terminal 200 "maintaining the continuous connection form.

That is, the relay server 130 stores the communication connection information (eg socket information) of the destination communication terminal 200 ″ stored and stored, and the connection information (eg socket information) of the request communication terminal 200 ′. By using the session mapping process to interconnect with each other, the P2P communication between the request communication terminal 200 'and the destination communication terminal 200 "is relayed.

As another example, assuming that the relay server 130 and the destination communication terminal 200 "maintain a periodic connection type, the relay server 130 may transmit a destination signal only when the destination communication terminal 200" transmits a polling signal intermittently. Since the communication state is maintained with the communication terminal 200 ", communication connection information of the destination communication terminal 200" is not stored in advance.

In this state, when the request communication terminal 200 'transmits a connection request signal to the destination communication terminal 200 "to the relay server 130, the relay server 130 maintains a connection with the request communication terminal 200'. It waits for a polling signal to be received from the destination communication terminal 200 ".

When the polling signal is received, the relay server 130 interconnects the request communication terminal 200 'and the destination communication terminal 200 "through a session mapping process, and the request communication terminal 200' and the destination communication terminal 200". Relay P2P communication between

In the above description, the relay server 130 is provided as a single form, but the relay server 130 includes a plurality of relay modules capable of performing relay processing for P2P communication between the communication terminals 200, respectively. In this case, the relay server 130 may allocate a specific relay module for the P2P connection request from each communication terminal 200 (in this case, the load between the relay modules may be allocated to be equalized) to be processed. have. In this case, the relay server 130 may transmit the IP address of the allocated relay module to the communication terminal 200 and inform the communication terminal 200.

The above-described case will be described with more specific examples as follows.

That is, the relay server 130 stores a kind of memory map including information about each communication terminal 200 and information related to relay processing, and in particular, each communication terminal 200 uses some relay module. Information about the connection is included.

In this state, when the request communication terminal 200 'requests a connection to the destination communication terminal 200 ", the relay server 130 transmits a command to connect to the request communication terminal 200' with a specific relay module. The request communication terminal 200 ′ stores information indicating that the request communication terminal 200 ′ is waiting in a specific relay module.

The request communication terminal 200 ′ receiving the command from the relay server 130 maintains a continuous connection form with the corresponding relay module and waits until it can communicate with the destination communication terminal 200 ″.

On the other hand, the relay server 130, when the destination communication terminal 200 ", which maintains the periodic connection type, reaches and accesses the corresponding period, the request communication terminal 200 'is connected to a predetermined relay module based on the memory map information. Notifies you that you are connected and waiting.

The destination communication terminal 200 "connects to a relay module to which the request communication terminal 200 'is already connected based on the information received from the relay server 130, and the relay module connects to the request communication terminal through session mapping. 200 ′) and the destination communication terminal 200 ″ to perform P2P communication. In this case, the destination communication terminal 200 ″ may maintain the connection with the corresponding relay module in a periodic connection form.

As such, when the relay server 130 is provided with a plurality of relay modules, a load adjuster (not shown) to equally adjust the communication processing load between the relay modules may be included in the relay server.

Meanwhile, the relay server 130 may transmit a control signal for performing the relay process in another communication terminal 200. As described above, each communication terminal 200, in particular, a communication terminal 200 having an authorized IP address may perform a relay processing function for P2P communication between other communication terminals 200, and in this case, relay processing may be performed. Information necessary for information, such as information on each communication terminal, information on a communication connection policy, meta information, and the like, may be transmitted from the relay server 130 when necessary.

As described above, the other communication terminal performing the relay processing function corresponds to a method in which a communication policy may be finally selected as the fourth policy among the communication connection policies.

The process is described in more detail as follows.

First, it is assumed that the destination communication terminal 200 "periodically transmits a polling signal to the relay server 130. When the request communication terminal 200 'is connected to the relay server 130 in this state, the relay server 130 As described above, the predetermined relay module should be allocated to the request communication terminal 200 '. For example, if all the relay modules are overloaded and additional relay processing cannot be performed, the relay server ( 130 controls other external communication terminals to perform relay processing.

That is, the external communication terminal to function as a kind of relay module.

Here, the relay server 130 may use the above-described information of the memory map to calculate the external communication terminal to perform the relay process. That is, the memory map stores information on each communication terminal, and the relay server 130 selects a communication terminal that can be used as the relay server 130 by examining the memory map.

For example, the relay server 130 may select a communication terminal that can be connected from an external device while having an authorized IP as a relay module. In this case, the relay server 130 may additionally determine whether the corresponding communication terminal has a hardware and an operating system suitable for relay processing based on the information stored in the memory map.

When the communication terminal to be used as the relay module is selected, the relay server 130 transmits information such as an IP address of the selected communication terminal to the request communication terminal 200 ', and the request communication terminal 200' is a relay module, It connects to the communication terminal performing the relay process and waits.

At this time, the relay server 130 stores the state of the request communication terminal 200 'in the memory map.

When the relay server 130 receives the polling signal from the destination communication terminal 200 ", the relay server 130 transmits state information of the request communication terminal 200 'to the destination communication terminal 200" with reference to the memory map. That is, the relay server 130 transmits information, such as an external communication terminal IP address, to which the request communication terminal 200 ′ is currently connected and waiting to the destination communication terminal 200 ″.

Then, the destination communication terminal 200 "is connected to the communication terminal which performs the relay process, and the communication terminal which performs the relay process through the session mapping process between the request communication terminal 200 'and the destination communication terminal 200". Relay processing is performed to enable P2P communication with each other.

At this time, both the request communication terminal 200 'and the destination communication terminal 200 "may maintain their connection state in the form of a continuous connection to the communication terminal performing relay processing.

However, in the case where the external communication terminal functions as a kind of relay module, the communication terminal functioning as the relay module may be shut down due to a user's command or other reasons, thereby failing to perform relay processing.

In this case, the request communication terminal 200 ′ and the destination communication terminal 200 ″ include an error detection function and detect, for example, when the P2P communication is not relayed for a predetermined time, and the relay server 130. It may also send a predetermined error message.

The relay server 130 receiving the error message from the request communication terminal 200 'or the destination communication terminal 200 "checks the status of the communication terminal functioning as a relay module and determines that a problem has occurred in the corresponding communication terminal. In this case, information of another external communication terminal, that is, another communication terminal capable of performing relay processing, may be transmitted to the request communication terminal 200 'and the destination communication terminal 200 "to perform P2P communication with each other. In case that the relay module can afford the relay processing, the relay module may be allocated to the request communication terminal 200 'and the destination communication terminal 200 ".

Hereinafter, each control flow between the P2P server system 100 and the communication terminal 200 communicating with the P2P server system 100 will be described in detail with reference to FIGS. 3A to 6B.

First, a process in which terminal information of the communication terminal 200 is registered and stored in the communication terminal management server 110 will be described with reference to FIG. 3A.

First, the communication terminal 200 executes the P2P communication unit 230 which performs P2P communication with another communication terminal 200 by a command of the user of the communication terminal 200 (step S1). The P2P communication unit 230 extracts or generates terminal information including its IP address (step S3), transmits it to the communication terminal management server 110, and requests registration thereof (step S5).

The communication terminal management server 110 generates a dummy connection signal for the received IP address (step S7) and transmits it to the communication terminal 200 (step S9).

The P2P communication unit 230 of the communication terminal 200 may or may not respond to the dummy connection signal of the communication terminal management server 110 according to its network situation.

For example, when a port is blocked by a firewall or a port forwarding function is not provided in a state in which a private IP is assigned, the P2P communication unit 230 may not receive a dummy connection signal of the communication terminal management server 110. will be.

When a response to the dummy connection signal from the communication terminal 200 is received (step S11), the communication terminal management server 110 determines that the corresponding communication terminal 200 can directly connect with another communication terminal 200. If the dummy connection signal is not received (step S13), it is determined that indirect connection is possible through the relay server 130 (step S15), and the terminal information including the determined information is registered (step S17). ).

In this case, when the direct connection is possible, each communication terminal 200 may directly perform P2P communication, and when indirect connection is possible, it means that P2P communication may be performed through the relay server 130. .

P2P server system 100 of the present invention is characterized in that the change in the connection type between each communication terminal 200 and the relay server 130, especially when using the relay server 130.

Meanwhile, FIG. 3B illustrates a process in which the communication terminal 200 determines whether the communication terminal 200 can directly connect with another communication terminal 200 and registers the same in the communication terminal management server 110.

That is, the communication terminal 200 determines whether direct connection with another communication terminal 200 is possible at the time when the P2P communication unit 230 is executed (step S21) in consideration of its own network information (step S23).

For example, in consideration of whether the IP address assigned to the user is a private IP, whether the firewall is activated on the communication terminal 200 itself, or whether the setting of the corresponding firewall can be changed, the other communication terminal 200 directly (i.e., To determine whether the P2P communication unit 230 is accessible.

By extracting and generating the terminal information including the determined information and IP address (step S25), the P2P communication unit 230 of the communication terminal 200 transmits the terminal information to the communication terminal management server 110 and registers the information. Request (step S27).

In this case, the extraction of the terminal information means the extraction of the previously stored IP address, and the generation of the terminal information means the generation of determination information on whether direct connection with other terminals is possible.

Accordingly, the communication terminal 200 registers terminal information of the communication terminal 200 (step S29), and uses the direct connection or relay server 130 during P2P communication between the communication terminals 200 according to the registered terminal information. Indirect connection will be controlled.

Of course, in FIG. 3B, the communication terminal management server 110 may transmit the dummy connection signal mentioned in the case of FIG. 3A to the communication terminal 200 for further confirmation.

Hereinafter, a communication flow between components of the P2P server system 100 and a control process of the components will be described with reference to FIG. 4.

First, as shown in FIGS. 3A and 3B, the communication terminal management server 110 registers terminal information (step S31).

Meanwhile, the meta information generation server 120 registers and stores predetermined rule information for setting a communication connection policy between the communication terminals 200 according to an input of an administrator (step S33).

The rule information may be largely divided into rule information for determining a user grade and rule information for distinguishing a service type of the relay server 130.

For example, the rule information for determining the user class may be divided into a first-class user and a second-class user, that is, a general user, based on a daily average access rate. Of course, the general user may be divided into more detailed criteria.

Rule information for distinguishing a service type of the relay server 130 may include, for example, communication connection policy information divided as follows.

1. Continuous connection type maintenance policy: That is, when the communication terminal 200 using the relay server 130 is connected, a permanent Transmission Control Protocol (TCP) session between the connected communication terminal 200 and the relay server 130 is established. It is a policy to maintain. For example, even when the destination communication terminal 200 "is in a standby state, the relay server 130 continuously maintains a session with the communication terminal 200", and when the request communication terminal 200 'is connected, the destination communication terminal. It is a policy (hereinafter, referred to as a first policy) that enables the request communication terminal 200 'and the destination communication terminal 200 "

2. Mixing policy of continuous connection and periodic connection type: For example, when the number of communication terminals 200 using the relay server 130 increases while operating under the first policy, continuous connection is performed to the communication terminals of a first-class user as in the first policy. The form is maintained and the communication terminal corresponding to the second-class user is connected to the communication terminal and the relay server 130 only when the communication terminal periodically transmits a polling signal to the relay server 130 (hereinafter, referred to as a policy). 2 policy).

3. Periodic connection type policy: so that the communication terminal 200 and the relay server 130 can maintain a connection by transmitting a periodic polling signal of the communication terminal 200 to all users, that is, all communication terminals 200. However, the first-class user is a policy (hereinafter referred to as a third policy) for transmitting a polling signal to the relay server 130 at a faster interval than the second-class user.

4. External destination communication terminal 200 " use policy: This is a policy for controlling relaying through the external destination communication terminal 200 " In particular, the fourth policy is a useful method that can be used when a shortage of resources for relay processing occurs in the relay server 130. At this time, the relay server 130 transmits a predetermined relay function switching signal to control P2P relay processing between specific communication terminals.

The rule information may include polling period information for each policy and each grade required for each of the above policies.

The communication terminal management server 110, the meta information generation server 120, and the relay server 130 transmit and receive various signals for sharing information (step S35). For example, the communication terminal management server 110 and the relay server 130 may transmit various logs according to a predetermined communication process to the meta information generation server 120 so that the meta information generation server 120 may generate meta information. (Step S37).

That is, the meta information generation server 120 generates meta information including a user class for each communication terminal 200 based on the P2P communication log for each communication terminal 200.

For example, the meta information generation server 120 may set a user class with a high user level for the communication terminal 200 that has performed much P2P communication or the communication terminal 200 that provided more data to the other communication terminal 200. Information can be generated.

The meta information generation server 120 transmits the generated meta information and the pre-registered rule information to the relay server 130 (step S39).

The rule information and meta information may be directly transmitted to the relay server 130 by the meta information generating server 120, but if there is a predetermined shared storage space (not shown), the meta information generating server ( Of course, various data (including meta information and rule information) of the 120 and the relay server 130 may be shared.

The relay server 130 extracts and sets a communication connection policy corresponding to the load state associated with its own P2P communication relay processing, that is, the P2P communication relay status from the rule information (step S41).

Here, the P2P communication relay status indicates information on the load of the communication relay processing, and the like, when the P2P communication relay processing is performed a lot and the P2P communication relay processing is not performed a lot, or the connection with each communication terminal 200 is performed. A form can contain all the information about how it is constructed.

For example, if the traffic volume is small, the relay server 130 may set the communication connection policy as the first policy, and change the setting to the second policy, the third policy, and the fourth policy in order as the traffic volume increases.

The relay server 130 communicates with the communication terminal 200 according to at least one of a user class of the request communication terminal 200 ′ and a user class of the destination communication terminal 200 ″ based on the set communication connection policy. The shape is determined (step S43).

For example, if the currently established communication connection policy is the second policy, the relay server 130 maintains the communication terminal 200 of the 'first-class user' with the relay server 130 and maintains a continuous connection form. The communication terminal 200 may maintain a periodic connection form with the relay server 130.

As another example, the relay server 130 may change the connection type with the relay server 130 of the destination communication terminal 200 ″ based on the set communication connection policy and the user level of the request communication terminal 200 ′.

The communication connection type with each communication terminal 200 set in the relay server 130 may be periodically or in accordance with the change of P2P communication status through the relay server 130 and the rule information and meta information received from the meta information server. Can change aperiodically.

In this way, the relay server 130 connects with the communication terminals 200 in different ways for each grade to perform the relay process (step S45).

Hereinafter, a process in which the communication terminal 200 is connected to the relay server 130 via the communication terminal management server 110 will be described with reference to FIG. 5.

First, when the communication terminal 200 requests the P2P communication connection to the communication terminal management server 110 (step S51), the communication terminal management server 110 extracts information of the requested communication terminal 200 (step S53). In step S55, it is determined whether direct connection is possible according to the extracted terminal information.

For example, when the communication terminal 200 can be directly connected to another communication terminal 200, when there is a request of another communication terminal 200 by storing and managing information of the corresponding communication terminal 200, for example, an authorized IP address. Processing is made so as to connect directly (step S57).

If it is determined that the communication terminal 200 cannot directly connect with another communication terminal 200 such as having a private IP address, the communication terminal management server 110 relays the communication server 130 to the communication terminal 200. Command to the network (step S59). At this time, the communication terminal management server 110 informs the IP address of the relay server 130 to be connected to the communication terminal 200.

Accordingly, the communication terminal 200 transmits a connection request signal for P2P communication to the relay server 130 (step S63).

Meanwhile, the relay server 130 sets a communication connection policy as described with reference to FIG. 4 (step S61), and receives and stores meta information (step S62). The communication terminal 200 requests communication from the stored meta information. ) Is extracted (step S65).

In addition, the relay server 130 determines the communication connection type of the corresponding communication terminal 200 according to the extracted user class and the set communication connection policy (step S67). The determined communication connection type may be, for example, a continuous connection type or a periodic connection type.

The relay server 130 transmits the determined communication connection type information to the communication terminal 200 (step S69), and when the communication connection type allocated to the communication terminal 200 is a continuous connection type (step S71). The communication connection with the relay server 130 is continuously maintained (step S73), and in the case of the periodic connection type, a polling signal is periodically transmitted to the relay server 130 to maintain an intermittent communication state (step S75).

Here, the period in which the communication terminal 200 transmits a polling signal to the relay server 130 may be changed according to a control signal transmitted from the relay server 130.

Hereinafter, a process in which the destination communication terminal 200 ″ is connected to the request communication terminal 200 ′ while maintaining a continuous connection form with the relay server 130 will be described with reference to FIG. 6A.

First, the destination communication terminal 200 "maintains a continuous connection form under the control of the relay server 130 (step S81).

In this state, when the request communication terminal 200 'requests the relay server 130 to connect to the destination communication terminal 200 "(step S83), the relay server 130 is already connected to the destination communication terminal 200". That is, since the TCP session information of the corresponding destination communication terminal 200 "is stored / managed, the request communication terminal 200 'and the destination communication terminal 200" can perform session mapping immediately (step S85).

After the session mapping is performed, the relay server 130 transmits a P2P communication connection establishment signal to the request communication terminal 200 'and the destination communication terminal 200 "(step S87) to communicate with the request communication terminal 200'. The terminal 200 "may perform P2P communication with each other (step S89).

Of course, the communication between the request communication terminal 200 ′ and the destination communication terminal 200 ″ may be achieved through data bypass (relay) by session mapping of the relay server 130, but may be directly between the both communication terminals 200. Communication does not occur.

Hereinafter, a process in which the destination communication terminal 200 ″ is connected to the request communication terminal 200 ′ while maintaining a periodic connection form with the relay server 130 will be described with reference to FIG. 6B.

When the request communication terminal 200 'requests the relay server 130 to connect to the destination communication terminal 200 "(step S91), the relay server 130 first maintains the connection with the request communication terminal 200'. It waits until a polling signal is received from the destination communication terminal 200 "in the state (step S92).

In this embodiment, since the destination communication terminal 200 ″ maintains a periodic connection form with the relay server 130, the destination communication terminal 200 ″ periodically transmits a polling signal at periodic intervals under the control of the relay server 130 (step S93).

When the polling signal is received from the destination communication terminal 200 ", the relay server 130 connects the connection information of the destination communication terminal 200" connected by the polling signal to the connection information of the request communication terminal 200 'which was maintaining the connection. Session mapping is performed using (step S95).

After the session mapping is performed, the relay server 130 transmits a P2P communication connection establishment signal to the request communication terminal 200 'and the destination communication terminal 200 "(steps S96 and S97) and the request communication terminal 200'. ) And P2P communication between the destination communication terminal 200 "(step S99).

On the other hand, the present invention is not limited to the above-described specific embodiments and can be carried out by variously modified and modified within the scope not departing from the gist of the present invention. It is to be understood that such variations and modifications are intended to be included in the scope of the appended claims.

1 is an overall configuration diagram including a P2P server system and a communication terminal according to an embodiment of the present invention,

2 is a functional block diagram of the communication terminal of FIG. 1;

3A to 6B are flowcharts of communication control between a P2P server system and a communication terminal according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

100: P2P communication server system 200: communication terminal

200 ': request communication terminal 200 ": destination communication terminal

110: communication terminal management server 120: meta information generation server

130: relay server 210: execution control unit

220: setting storage unit 230: P2P communication unit

231: storage unit 233: communication method determination unit

235: terminal information register

Claims (20)

In a control method of a P2P server system for controlling a connection between a plurality of communication terminals performing peer-to-peer communication, (a) storing communication terminal information transmitted from a corresponding communication terminal at a time of first connection with each communication terminal among the plurality of communication terminals; (b) when a connection request to a predetermined destination communication terminal is received from a predetermined request communication terminal among the plurality of communication terminals, the connection between the requesting communication terminal and the destination communication terminal is disconnected according to previously stored destination communication terminal information. A control method of a P2P server system comprising the step of controlling to be made by any one of a direct connection and an indirect connection through a predetermined relay process. The method of claim 1, In step (a), (a1) transmitting a dummy connection signal to a corresponding communication terminal based on communication terminal information received from each communication terminal among the plurality of communication terminals; (a2) determining whether a corresponding communication terminal can directly connect with another communication terminal during P2P communication according to a response of the communication terminal to the dummy connection signal; and (a3) including the result of the determination in communication terminal information of the corresponding communication terminal and storing the result of the determination. The method of claim 1, Storing rule information for setting a communication connection policy with each communication terminal of the plurality of communication terminals; Generating meta information including a user level for each communication terminal based on a log according to P2P communication of each communication terminal, In the step (b), when the connection between the request communication terminal and the destination communication terminal is made by an indirect connection through a relay process, (b1) extracting and setting a communication connection policy from the stored rule information corresponding to the load condition in the relaying process; (b2) each of the request communication terminals and the destination communication for the relay process based on at least one of a user class of the request communication terminal and a user class of the destination communication terminal included in the meta information and the set communication connection policy; Control method of the P2P server system comprising the step of setting the communication connection type with the terminal. The method of claim 3, The communication connection type between the request communication terminal and the destination communication terminal set in the step (b2) may be changed as at least one of the relay processing load state, the stored rule information, and the generated meta information changes. Control method of a P2P server system characterized in that the change is set together. The method of claim 3, The communication connection form between each requesting communication terminal and the destination communication terminal set in the step (b2) is a continuous connection form that continuously maintains a connection with the communication terminal, and intermittent with the corresponding communication terminal by a periodic polling signal of the communication terminal. Control method of a P2P server system, characterized in that it comprises at least one of the form of periodic connection to maintain the connection. The method of claim 5, In the step (b2), when the communication connection form with the destination communication terminal is set, the communication connection form is changed to the previously connected destination communication terminal according to the change of the communication connection policy due to the load state change in the relay process. The control method of the P2P server system, characterized in that it further comprises the step of transmitting a control signal for. The method of claim 5, In the step (b), when a connection request is received from the request communication terminal to the destination communication terminal in a state of being connected to the destination communication terminal in the continuous connection form, the session is immediately connected to the request communication terminal and the destination communication terminal. And connecting to each other through a mapping process and relaying P2P communication between the request communication terminal and the destination communication terminal. The method of claim 5, In step (b), (b3) if a connection request is received from the request communication terminal to the destination communication terminal while connected to the destination communication terminal in the periodic connection form, waiting until a polling signal is received from the destination communication terminal; ; (b4) controlling the P2P server system further comprising connecting the requesting communication terminal with the destination communication terminal through a session mapping process and relaying P2P communication between the requesting communication terminal and the destination communication terminal. Way. The method according to any one of claims 1 to 8, Selecting a communication terminal capable of providing a relay function based on the stored communication terminal information when a resource shortage for relay processing between the plurality of communication terminals occurs; And transmitting a relay function switch signal to the selected communication terminal to perform P2P relay processing between specific communication terminals. In a control method of a communication terminal that registers its information in a peer-to-peer server system to perform peer-to-peer communication with other communication terminals by way of a relay server or not. , Storing network related setting data; Storing a connection type selection criterion for determining a communication connection type; Activating a P2P communication function for performing P2P communication with another communication terminal; At the time when the P2P communication function is activated, communication is performed through a relay process whether direct communication is possible when performing P2P communication with the other communication terminal by comparing the stored network-related setting data and the connection type selection criteria stored in the storage unit. Determining whether it should; And registering the communication terminal information including the determined determination result in the P2P server system. In the P2P server system for controlling the connection between a plurality of communication terminals performing peer-to-peer communication, A relay server for relaying P2P communication between the plurality of communication terminals; Stores communication terminal information transmitted from each communication terminal at the time of first connection with each communication terminal among a plurality of communication terminals, and connects from a predetermined request communication terminal to a predetermined destination communication terminal among the plurality of communication terminals. Upon receiving the request, the communication terminal controlling the connection between the request communication terminal and the destination communication terminal to be made by one of a direct connection and an indirect connection through a predetermined relay process according to previously stored destination communication terminal information. P2P server system comprising a management server. The method of claim 11, The communication terminal information management server transmits a dummy connection signal to the corresponding communication terminal based on the communication terminal information received from each communication terminal among the plurality of communication terminals, and responds to the communication terminal's response to the corresponding dummy connection signal. The P2P server system according to claim 2, characterized in that the communication terminal determines whether the direct connection with the other communication terminal is possible during P2P communication, and stores the result of the determination in the communication terminal information of the communication terminal. The method of claim 11, Storing rule information for setting a communication connection policy between the relay server and each communication terminal, generating meta information including a user class for each communication terminal based on a P2P communication log of each communication terminal, And a meta information generation server for transmitting the stored rule information and the generated meta information to the relay server. The relay server extracts and sets, from the received rule information, a communication connection policy corresponding to a load condition in performing relay processing for P2P communication between each communication terminal, and each communication terminal included in the received meta information. P2P server system, characterized in that for setting the communication connection type with each communication terminal based on the user class of the and the set communication connection policy. The method of claim 13, The communication connection type with each communication terminal set in the relay server is changed together as at least one of the load state according to the relay processing in the relay server, the received rule information, and the received meta information is changed. P2P server system, characterized in that set. The method of claim 13, The communication connection type set by the relay server is continuously connected to a corresponding communication terminal by a continuous connection type continuously maintaining a connection with a predetermined communication terminal and a periodic polling signal of the relay server of the predetermined communication terminal. P2P server system comprising at least one of the form of periodic connection. The method of claim 15, When the relay server receives a connection request from the request communication terminal to the destination communication terminal while connected to the destination communication terminal in the continuous connection form, the relay server immediately performs a session mapping process between the request communication terminal and the destination communication terminal. Interconnecting each other and relaying P2P communication between the requesting communication terminal and the destination communication terminal. The method of claim 15, The relay server waits until a polling signal is received from the destination communication terminal when a connection request is received from the request communication terminal to the destination communication terminal in a state of being connected to the destination communication terminal in the periodic connection form. And connecting the request communication terminal and the destination communication terminal through a session mapping process and relaying P2P communication between the request communication terminal and the destination communication terminal. The method according to any one of claims 11 to 17, The relay server may receive communication terminal information of each communication terminal from the communication terminal management server, and may provide a relay function based on the received communication terminal information when a resource shortage for relay processing between the communication terminals occurs. Selecting a terminal, and transmitting a relay function switch signal to the selected communication terminal to control to perform P2P relay processing between specific communication terminals. In a communication terminal that registers its information in a peer-to-peer server system to perform peer-to-peer communication with other communication terminals in a way that does not go through a relay server, A setting storage unit for storing network-related setting data; A P2P communication unit performing P2P communication with an external communication terminal; It includes an execution control unit for executing the P2P communication unit, The P2P communication unit, A storage unit for storing connection type selection criteria for determining a communication connection type; When the P2P communication unit is executed by the execution control unit, direct communication is performed when performing P2P communication with another communication terminal by comparing network-related setting data stored in the setting storage unit with a connection type selection criterion stored in the storage unit. A communication method determination unit determining whether communication is possible via the relay server or not; And a communication terminal information registration unit configured to register communication terminal information including the determination result determined by the communication method determination unit in the P2P server system. Communication terminal. The method of claim 19, The communication method determining unit determines that the P2P communication with another communication terminal should be communicated via the relay server when the IP address included in the network-related configuration data stored in the setting storage unit is a private IP address. And a communication terminal that registers the communication method information determined at the execution time to the P2P server system.

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