KR20090085999A - System and method for transmitting/receiving a signal in a communication system - Google Patents

Abstract

A signal-transceining system and a method thereof in a communications system using a peer-to-peer mode are provided to transmit and receive a multicast message and manage an IP address by using a USI(USI: Universal Service Interface) server in a USI(USI: Universal Service Interface). A terminal # 1(401) performs an ACR/BSS(Access Control Router/Base Station)(403), an authentication and registration stage. The ACR/BSS performs AAA(Authorization, Authentication and Accounting) server(405), authentication and registration stage. The ACR/BSS assigns the IP address to the terminal #1. The ACR/BSS transmits the address registration request message to USI server(407). USI server registers the IP address of the terminal #1.

Description

SYSTEM AND METHOD FOR TRANSMITTING / RECEIVING A SIGNAL IN A COMMUNICATION SYSTEM}

The present invention relates to a communication system, and more particularly, to a system and method for transmitting and receiving signals in a communication system (hereinafter, referred to as a 'P2P communication system') using a peer-to-peer (P2P) communication method. It is about.

In the next generation communication systems, various services and applications are required due to the development of communication technologies and expansion of communication networks. In addition, services provided to the terminal according to various needs of the user may include location services, multimedia services, push-to-talk (PTT), and push-to-view (PTV). It will be called 'PTV').

Meanwhile, the P2P communication method is a method of directly communicating by sharing an IP (Internet Protocol) address between terminals even without a server. In addition, the P2P communication method may be used when the receiving terminal exists within a distance that the transmitting signal of the transmitting terminal can reach.

As described above, in the P2P communication method, IP address management between terminals is most important. That is, each of the terminals is able to P2P communication using the IP address by publishing its IP address to other terminals existing in the network in the form of broadcasting or multicast.

However, there is no specific method for managing the IP address. In addition, when a terminal having an IP address changed among terminals receiving the service occurs, there is a problem that a communication interruption may occur due to a slow IP address update according to a complicated procedure.

And when any terminal using the P2P communication method transmits the message to the terminals using the plurality of P2P communication method, since the arbitrary P2P terminal directly transmits the message to the plurality of P2P terminal, the transmission error When this occurs, there is a problem that the message retransmission due to the error is complicated.

In addition, there is no way that a message cannot be transmitted / received between a terminal using a P2P communication scheme existing in a wireless broadband communication network and a terminal existing in a cellular communication network.

Therefore, there is a need for a method of managing an IP address in a P2P communication system and a method of efficiently updating the changed IP address when an IP address of an arbitrary terminal is changed among terminals receiving P2P service.

In addition, when any terminal using a P2P communication method transmits a message to a plurality of terminals using a P2P communication method, there is a need for a method of efficiently transmitting / receiving a message between the arbitrary terminal and the plurality of terminals. It has emerged.

In addition, there is a need for a specific method for transmitting and receiving messages between a terminal using the P2P communication method and a terminal existing in the cellular communication network.

Accordingly, the present invention proposes a signal transmission / reception system and method for managing an IP address using a universal service interface (USI) server in a P2P communication system.

In addition, the present invention proposes a system and method for transmitting and receiving multicast messages using a USI server in a P2P communication system.

In addition, the present invention proposes a system and method capable of transmitting and receiving signals between heterogeneous networks based on a P2P communication scheme.

The method proposed in the present invention is a method for transmitting and receiving signals in a communication system using a peer-to-peer (P2P) method, wherein a universal service interface (USI) server includes at least one terminal and an IP (IP). Internet Protocol) address registration, wherein a first of the at least one terminal transmits a first message to the USI server requesting transmission of an IP address of a second terminal different from the first terminal, The terminal receives a second message including the IP address of the second terminal, the identifier of the second terminal and a return code indicating that the IP address search is completed from the USI server.

Another method proposed by the present invention is a method for transmitting / receiving a signal including a text in a communication system using a peer-to-peer (P2P) method, wherein a universal service interface (USI) server includes at least one terminal. A first message including text from the first message, and the USI server transmits the first message including the text to each of at least one terminal except for the at least one terminal, and the at least one terminal And receiving a second message including whether the first message has been successfully transmitted from each of at least one other terminal except for the above, and transmitting the second message to the at least one terminal.

Another method proposed by the present invention is a communication system using a peer-to-peer (P2P) method, wherein a first terminal transmits and receives a signal from a universal service interface (USI) server. Acquire an IP address of two terminals, transmit a first message including file information to be transmitted to the second terminal using the obtained IP address, and transmit the first message from the second terminal to the first message. And receiving a second message, which is a response message, connecting a communication with the second terminal, and transmitting a file to the second terminal.

Another method proposed in the present invention is a method for transmitting and receiving a signal for file transmission in a communication system using a peer-to-peer (P2P) method, wherein the first terminal is configured to be transmitted from a universal service interface (USI) server. Acquire an IP address of at least one terminal except for the first terminal, and the first terminal includes a first message including file information to be transmitted to the USI server to at least one terminal except the first terminal. The first terminal receives a second message which is a response message to the first message from the USI server, and the first terminal establishes a TCP / IP communication connection with the USI server. The file is transmitted to the USI server through the USI server, and the USI server transmits and receives the first message and the second message to each of at least one terminal except the first terminal, and the USI server transmits the first message. Through the at least one terminal and each TCP / IP communication connection other than the end is characterized in that the transmission of at least one file to the terminal, respectively, except for the first terminal.

The system proposed in the present invention is a communication system using a peer to peer (P2P) method, including at least one terminal and a Universal Service Interface (USI) server, wherein the USI server is the at least one. Performs IP (Internet Protocol) address registration with a terminal of the first terminal, and the first terminal of the at least one terminal sends a first message requesting transmission of an IP address of a second terminal different from the first terminal to the USI server. And a second message including an IP address of the second terminal, an identifier of the second terminal, and a return code indicating that the IP search is completed from the USI server.

Another system proposed by the present invention is a communication system using a peer-to-peer (P2P) method, and includes at least one terminal, a USI (Universal Service Interface) server, and the USI server is at least one. Receiving a first message including text from a terminal of the first terminal, transmitting the first message including the text to each of at least one terminal other than the at least one terminal, and excluding the at least one terminal. And receiving a second message including whether the first message has been successfully transmitted from each other at least one terminal, and transmitting the second message to the at least one terminal.

Another system proposed by the present invention includes a first terminal, a second terminal, and a universal service interface (USI) server in a communication system using a peer to peer (P2P) method. The first terminal acquires an IP address of the second terminal from the USI server, transmits a first message including file information to be transmitted to the second terminal using the obtained IP address, and And receiving a second message, which is a response message to the first message, from the second terminal, connecting communication with the second terminal, and transmitting a file to the second terminal.

Another system proposed by the present invention is a communication system using a peer to peer (P2P) method, including at least one terminal and a universal service interface (USI) server, wherein the at least one terminal The first terminal of the first obtains the IP (IP) address of the at least one terminal except the first terminal from the USI server, and the file information to be transmitted to at least one terminal except the first terminal to the USI server Transmitting the first message included in the first message, receiving a second message which is a response message to the first message from the USI server, and connecting the USI server to the USI server through a TCP / IP communication connection; The file is transmitted, and the USI server transmits and receives each of the first message and the second message to each of the at least one terminal except the first terminal, A file is transmitted to each of my terminals and at least one terminal except the first terminal through the TCP / IP communication connection.

The present invention has the advantage that it is possible to quickly perform the IP address registration, detection and update by continuously managing the IP address of the terminals receiving the P2P service in the P2P communication system through the USI server.

In addition, the present invention has the advantage that by transmitting a message in 1: N using a USI server in a P2P communication system, when a transmission error occurs, the message can be retransmitted quickly.

In addition, the present invention has an advantage in that a message can be exchanged between a P2P terminal and a cellular terminal using a USI server in a P2P communication system.

In addition, the present invention has the advantage that the file can be quickly retransmitted when a transmission error occurs by transmitting a file in a 1: N using a USI server in a P2P communication system.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, only parts necessary for understanding the operation of the present invention will be described, and other background art will be omitted so as not to distract from the gist of the present invention.

The present invention registers IP addresses of UEs in a USI server in a communication system using a peer-to-peer (P2P) method (hereinafter, referred to as a 'P2P communication system'), and establishes an IP address of a terminal through a USI server. The present invention provides a system and method for detecting an IP address and updating an IP address of a terminal that is changed through a USI server.

In addition, the present invention provides a system for transmitting and receiving a multicast message to a USI server, and a terminal for transmitting and receiving a multicast message in a P2P communication system, and the USI server transmits the message to each of a plurality of terminals; Provide a method.

In addition, the present invention is a first terminal belonging to a P2P communication system for transmitting and receiving a message with a second terminal of a communication system different from the P2P communication system, the first terminal transmits a message to the USI server, the USI server is A system and method are provided for converting the message into a format supported by the second terminal and transmitting the converted message to the second terminal.

The present invention provides a system and method for transmitting a file to a USI server by a terminal in a P2P communication system, and transmitting the file to each of a plurality of terminals.

In the present invention, for convenience of description, a system and method for providing a P2P service will be described using an example of a communication system using a mobile WiMAX standard (hereinafter referred to as a mobile WiMAX communication system). Of course, the invention can be applied to other communication systems as well as the mobile WiMAX communication system.

1 is a diagram illustrating a P2P communication system structure according to an embodiment of the present invention.

Referring to FIG. 1, the terminal # 1, the terminal # 2, and the terminal # 3 are, for example, a cellular phone, a portable multimedia player (PMP), a personal digital assistant (PDA), and a note. A book or the like. Each of the terminals is a Radio Access Station (RAS) / Base Station (BS: Base Station, hereinafter referred to as 'BS'), ACR (Access Control Router) / BSS (Base Station System), and Internet Protocol (IP: Internet Protocol). Location server 101, terminal management (DM) device 103 via a network 109, < RTI ID = 0.0 > (103) < / RTI > It interworks with the USI server 105, authorization, authentication and accounting (AAA) server 107.

The location server 101 calculates and stores the location of the terminal, and the DM server 103 stores and manages characteristic information of the terminal or performs software upgrade of the terminal, and the AAA server 107. ) Performs authentication of the terminal. The USI server 105 provides various services to terminals included in a P2P communication system. The USI server 105 is referred to as an Internet Service Provider (ISP) through an Public Switched Telephone Network (PSTN) / Public Land Mobile Network (PLMN) 111 or the Internet 113. Interworking with the server 115 or the cellular network 117.

2A is a diagram illustrating an internal structure of a USI server according to an embodiment of the present invention.

2A, USI server 105 includes an ISP service processor 201 in communication with ISP server 115 and a P2P client service processor 217 in communication with P2P client 215. Here, the P2P client 215 refers to a terminal performing communication using a P2P scheme.

The ISP service processor 201 includes a location service processor 203, a DM service processor 205, a quality of service (QoS) service processor 207, and A service is provided in cooperation with an alert service processor 211. The P2P client service processor 217 may include a QoS service processor 207, a P2P address service processor 219, a P2P messaging service processor 223, a P2P file sharing service processor 229, and a P2P voice call ( voice call) service processor 233 and the P2P PTT / PTV service processor 237 to provide a service in conjunction with.

First, the general service provided by the USI server 105 through the ISP service processor 201 will be described.

First, when the ISP server 115 requests the location information of the terminal, the ISP service processor 201 communicates with the location server 101 through the location service processor 203 to obtain the location information of the corresponding terminal. The acquired location information of the corresponding terminal is transmitted to the ISP server 115.

Second, when the ISP server 115 requests the characteristic information of the terminal, the ISP service processor 201 communicates with the DM server 103 through the DM service processor 205 to obtain the characteristic information of the corresponding terminal; The acquired characteristic information of the corresponding terminal is transmitted to the ISP server 115.

Third, if ISP server 115 requires QoS guarantee of the Internet service, ISP service processor 201 communicates with QoS server 209 through QoS service processor 207 to ensure QoS of the corresponding Internet service. Request, and transmit the QoS request to the ISP server 115 through the ISP service processor 201.

Fourth, when the ISP server 115 requests the transmission of specific information through the paging function of the terminal, the ISP service processor 201 is connected to the ACR / BSS 213 through the alert service processor 211. In communication, the information is transmitted to the terminal, and whether the information transmission is successful is transmitted to the ISP server 115.

Next, the P2P communication service provided by the USI server 105 through the P2P client service processor 217 will be described. The P2P communication service means a service provided in a P2P communication system.

First, when the P2P client 215 requests registration of its own IP address, the P2P client service processor 217 transmits the P2P client ( 215) is stored. When the P2P client 213 changes its IP address due to handover, the P2P client service processor 217 transmits the changed IP address to the P2P address database 221 through the P2P address service processor 219. Save it.

Secondly, if a simple text message exchange is requested between P2P clients, the P2P client service processor 217 provides for the exchange of simple text messages between the P2P clients. At this time, when the P2P client requests the transmission of a simple text message, the P2P client service processor 217 stores the simple message in the text store 225 through the P2P messaging service processor 223.

In addition, the P2P client service processor 217 may provide an additional messaging service to the P2P client 215 using the P2P messaging service processor 223. For example, the P2P client service handler 217 may be a messaging service or cellular SMS / MMS (Selluler Short Message Service / Multimedia Message) that transmits the same message to multiple P2P clients via the P2P messaging service handler 223. Service) In conjunction with the server 227 may provide a messaging service for transmitting and receiving a simple text message to the cellular terminal.

Third, if a file exchange is requested between P2P clients, the P2P client service processor 217 provides for the exchange of files between the P2P clients. At this time, when the P2P client requests the file to be transmitted, the P2P client service processor 217 stores the file in the shared file storage 231 through the P2P file sharing service processor 229.

The P2P client service processor 217 may provide an additional file sharing service to the P2P client 215 using the P2P file sharing service processor 229. For example, the P2P client service processor 217 may provide a file existence service for transmitting the same file to a plurality of P2P clients through the P2P file sharing service processor 229.

Fourth, when a voice call is requested between P2P clients, the P2P client service processor 217 provides a voice call between the P2P clients. The P2P client service processor 217 may provide an additional voice call service between the P2P clients using the P2P voice call service processor 233.

For example, the P2P client service processor 217 is a voice call service considering the QoS or the P2P voice call service processor 233 and the media through the P2P voice call service processor 233 and the QoS service processor 207. The gateway processor 235 may provide a voice call service between the P2P client 215 and the PSTN / PLMN 111 line voice subscriber in cooperation with the PSTN / PLMN 111.

Fifth, a PTT / PTV service is requested between P2P clients, and the P2P client service processor 217 provides a PTT / PTV service. The P2P client service processor 217 may provide additional PPT / PTV services between the P2P clients using the PTT / PTV service processor 237.

For example, the P2P client service processor 217 may provide a PTT / PTV service considering QoS through the QoS service processor 209 and the PTT / PTV service processor 237.

3A is a diagram illustrating an internal structure of a terminal according to an embodiment of the present invention.

Referring to FIG. 3A, the terminal includes a control unit 303, a memory unit 305, a multimedia codec 307, and a communication unit 309.

Looking at each of the components, the memory unit 305 stores the data necessary for the control of the terminal, in particular in the present invention stores a P2P address table that lists the IP address of the P2P client and its own IP address.

The multimedia codec 307 converts an analog multimedia signal into a digital multimedia signal or a digital multimedia signal into an analog multimedia signal, and the communication unit 309 communicates with an external device and up-converts the frequency of the transmitted signal. And a radio frequency (RF) transmitter for amplifying, and an RF receiver for low noise amplifying the received signal and down converting the frequency.

The controller 303 controls each part of the terminal to perform various functions provided by the terminal. In particular, in the present invention, the control unit 303 includes a P2P service platform 301 for providing a P2P service, and provides a P2P service to a user by using the P2P service platform 301.

Now, the structure of a P2P service platform according to an embodiment of the present invention will be described with reference to FIG. 3B.

Referring to FIG. 3B, the P2P service platform 301 may include a P2P address agent 311, a P2P messaging agent 319, a P2P shared file agent 325, a P2P voice call agent 331, and a PTT / PTV agent 337. It includes.

The P2P address agent 311 manages its own IP address and IP address of the counterpart P2P client, and includes a P2P address register 311, a P2P address analyzer 315, and a P2P address table manager 317. Here, the P2P address register 311 transmits its IP address to the USI server 105, and the P2P address analyzer 315 receives the IP address of the counterpart P2P client from the USI server 105, and the P2P. The address table manager 317 stores the IP address of the counterpart P2P client in a P2P address table and manages the P2P address table.

The P2P messaging agent 319 provides simple text messaging between P2P clients, and includes a P2P message transmitter 321 for transmitting a simple text message and a P2P message receiver 323 for receiving a simple text message. The P2P shared file agent 325 provides file sharing between P2P clients, and includes a P2P file sharing transmitter 327 for transmitting a file and a P2P file sharing receiver 329 for receiving a file.

The P2P voice call agent 331 provides a voice call between P2P clients, and encodes / decodes P2P voice call client 333 and P2P voice call traffic for transmitting and receiving call processing and voice call traffic. And a P2P voice call codec 335 for the purpose. The PTT / PTV agent 337 provides PTT / PTV between P2P clients, and P2P for coding / decoding PTT / PTV traffic with P2P PTT / PTV client 339 for transmitting and receiving call processing and PTT / PTV traffic. PTT / PTV codec 341 is included.

4 is a system diagram illustrating a procedure in which a terminal registers its IP address in a USI server through ACR / BSS according to an embodiment of the present invention.

Referring to FIG. 4, the terminal # 1 401 performs an authentication and registration process with the ACR / BSS 403 (step 409). The ACR / BSS 403 is authenticated and registered with an AAA server 405. The ACR / BSS 403 then assigns an IP address to the terminal # 1 401 through the authentication and registration process (step 413).

The ACR / BSS 403 transmits an address registration request (USI_P2P_Address_Registration_Request, hereinafter 'USI_P2P_Address_Registration_Req') message including the IP address of the terminal # 1 401 and the identification information of the terminal # 1 401. 407). (Step 415).

Here, the terminal # 1 401 identification information may be, for example, a unique universal service identifier (USID) unique to the terminal # 1 401, hereinafter referred to as 'USID', and the terminal # 1 401. Device information such as a Media Access Control (MAC) address, user information, a phone number of the terminal # 1 401, and the like.

Upon receiving the USI_P2P_Address_Registration_Req message, the USI server 407 registers the IP address of the terminal # 1 401, and responds to the USI_P2P_Address_Registration_Req message in response to an USI_P2P_Address_Registration_Response, hereinafter, referred to as 'USI_P2P_P_P_P_S_Regs_Res'. The message is transmitted to the ACR / BSS 403 (step 417).

The USI_P2P_Address_Registration_Res message includes a return code indicating that the USI server 407 has completed storing the IP address of the terminal # 1 401.

In FIG. 4, the terminal # 1 401 registers its IP address with the USI server 407 through the ACR / BSS 403 as an example. However, the terminal # 1 401 may register the IP address by directly sending a USI_P2P_Address_Registration_Req message to the USI server 407 without receiving the ACR / BSS 403 and receiving a USI_P2P_Address_Registration_Res message.

5 is a diagram illustrating a procedure of acquiring an IP address of a terminal different from the terminal according to the first embodiment of the present invention.

Referring to FIG. 5, the P2P communication system includes a terminal # 1 501, a USI server 503, and a terminal # 2 505. In this case, it is assumed that the IP addresses of the terminal # 1 501 and the terminal # 2 505 are already registered in the USI server 503, and the terminal # 2 505 is the terminal # 1 501. Assume that you only request the IP address of.

The terminal # 2 505 transmits an address solution request (USI_P2P_Address_Resolution_Request, hereinafter 'USI_P2P_Address_Resolution_Req') message requesting the IP address of the terminal # 1 501 to the USI server 503 (step 507). ) The USI_P2P_Address_Resolution_Req message includes a flag value (Flag = Single) indicating requesting USID information of the terminal # 1 501 and an IP address only once.

Upon receiving the USI_P2P_Address_Resolution_Req message, the USI server 503 retrieves the IP address of the requested UE # 1 501, and responds to a USI_P2P_Address_Resolution_Req message by using an address response response (USI_P2P_Address_Resolution_Response, hereinafter referred to as' USI_P2P_Address'Res_Result_Result_Result_Result_Res_Message). Is transmitted to the terminal # 2 505. (Step 509) The USI_P2P_Address_Resolution_Res message includes USID information of the terminal # 1 501, an IP address and a return code of the retrieved terminal # 1 501. Here, the forwarding code is a code indicating that the IP address search for the terminal # 1 503 of the USI server 503 is completed.

6 is a diagram illustrating an IP address update procedure in a P2P communication system according to a second embodiment of the present invention.

Referring to FIG. 6, the P2P communication system includes a terminal # 1 601, an ACR / BSS 603, a USI server 605, and a terminal # 2 607. In addition, it is assumed that IP addresses of the terminal # 1 601 and the terminal # 2 607 are already registered in the USI server 605, and the terminal # 2 607 is the terminal # 1 601. Suppose you constantly request an IP address.

First, the terminal # 2 607 transmits a USI_P2P_Address_Resolution_Req message requesting the IP address of the terminal # 1 601 to the USI server 605 (step 609). The terminal # 1 (601) is included in the USI_P2P_Address_Resolution_Req message. USID information and a flag value (Flag = On-change) indicating that the IP address to be continuously updated are included.

Upon receiving the USI_P2P_Address_Resolution_Req message, the USI server 605 retrieves the IP address of the requested terminal # 1 601 and transmits a USI_P2P_Address_Resolution_Res message to the terminal # 2 607 in response to the USI_P2P_Address_Resolution_Req message. In step 611, the USI_P2P_Address_Resolution_Res message includes USID information of the terminal # 1 601, a current IP address and a return code of the retrieved terminal # 1 601. Here, the forwarding code indicates that the USI server 605 is continuously providing an IP address update in response to a continuous IP address update request for the terminal # 1 601.

Meanwhile, when the IP address of the terminal # 1 601 is changed, the changed IP address is transmitted to the ACR / BSS 603 (step 613). The ACR / BSS 603 transmits the changed IP address to the USI server 605. The registered IP address is updated with the changed IP address (step 615). The USI server 605 then transmits a USI_P2P_Address_Resolution_Res message to the terminal # 2 607 (step 617).

The USI_P2P_Address_Resolution_Res message includes USID information of the terminal # 1 (601), the updated IP address and a return code, and the return code is a persistent IP address for the terminal # 1 (601) at the USI server 605. Indicates that an IP address update is being provided continuously according to the update request.

In FIG. 6, the terminal # 1 601 whose IP address has been changed has been described as an example of updating the IP address registered in the USI server 605 to the changed IP address through the ACR / BSS 603. However, the terminal # 1 601 may update the IP address registered in the USI server 603 directly with the changed IP address without passing through the ACR / BSS 603.

7 is a diagram illustrating a message transmission and reception procedure including text between terminals according to an embodiment of the present invention.

Referring to FIG. 7, the P2P communication system includes a terminal # 1 701, a USI server 703, and a terminal # 2 705. In this case, it is assumed that the IP addresses of the terminal # 1 701 and the terminal # 2 705 are already registered in the USI server 703, and the terminal # 1 701 is the terminal # 2 705. It is assumed that the IP address of is obtained.

The terminal # 1 701 includes a text and transmits a first message (USI_P2P_Messaging_Request, hereinafter referred to as a 'USI_P2P_Messaging_Req message') to notify the transmission of the text to the terminal # 2 705. In this case, the USI_P2P_Messaging_Req message may use a Session Initiation Protocol (SIP) based message format.

In response to the USI_P2P_Messaging_Req message, the terminal # 2 705 transmits a second message (hereinafter, referred to as a USI_P2P_Message_Response) to the terminal # 1 701 (step 709). The USI_P2P_Messaging_Res message Includes transmission status information indicating a transmission success status or a transmission error status to indicate whether the USI_P2P_Messaging_Req message has been successfully transmitted. In this case, the USI_P2P_Message_Res may use the SIP-based message format.

FIG. 8 is a diagram illustrating a procedure for transmitting and receiving a multicast message including one-to-many terminal-to-terminal text according to an embodiment of the present invention.

Referring to FIG. 8, the P2P communication system includes a terminal # 1 801, a USI server 803, and terminal # 2 to terminal #Ns 805, 807,..., 809. In this case, it is assumed that the IPIs of the terminal # 1 801 and the terminal # 2 to the terminal #Ns 805, 807, ..., 809 are already registered in the USI server 803, and the terminal # 1 ( 801 assumes that the IP addresses of the terminals # 2 to #N (805, 807, ..., 809) are obtained.

When the terminal # 1 801 needs to transmit a message including the same text from the terminal # 2 to the terminal #Ns 805, 807,..., 809, the USI_P2P_Messaging_Req message including the text and notifies the transmission of the text. Transmit to USI server 803 (step 811).

The USI_P2P_Messaging_Req message includes text to be transmitted to the terminal # 2 through terminal #Ns 805, 807, ..., 809 and identification information of the terminal # 2 through terminal #Ns 805, 807, ..., 809. Included. The identification information of the terminal # 2 to the terminal #Ns 805, 807,..., 809 may be, for example, USIDs of the terminal # 2 to the terminal #Ns 805, 807,..., 809. Device information such as medium access control addresses of 2 to terminal #Ns 805, 807,..., 809, user information of the terminal # 2 to terminal #Ns 805, 807,. Phone numbers of terminal # 2 to terminal #Ns 805, 807, ..., 809, and the like. In this case, the USI_P2P_Messaging_Req message may use the SIP-based message format.

The USI server 803 stores the USI_P2P_Messaging_Req message and transmits a USI_P2P_Messaging_Res message to the terminal # 1 801 in response to the USI_P2P_Messaging_Req message (step 813). It includes transmission status information indicating a transmission success status or a transmission error status. In this case, the USI_P2P_Messaging_Res may use the SIP-based message format.

The USI server 803 uses the identification information of the terminal # 2 to the terminal #Ns 805, 807,..., 809 included in the USI_P2P_Messaging_Req message. Fields 805, 807, ..., 809, and transmit the USI_P2P_Messaging_Req messages to each of the terminal # 2 to the terminal #Ns 805, 807, ..., 809. (step 815, step 817, and step 819). )

Each of the terminal # 2 to the terminal #Ns 805, 807,..., 809 transmits USI_P2P_Messaging_Res messages to the USI server 803 in response to the USI_P2P_Messaging_Req (steps 821, 823, and 825). The USI_P2P_Messaging_Res messages received by the server 803 in steps 821, 823, and 825 include identification information of respective terminals.

The USI server 803 checks whether the USI_P2P_Messaging_Req messages have been successfully transmitted using the USI_P2P_Messaging_Res messages. When the USI server 803 successfully transmits the USI_P2P_Messaging_Req messages, the USI server 803 transmits a USI_P2P_Messaging_Res message including transmission status information indicating a successful transmission state to the terminal # 1 801 (step 827).

In contrast, when the USI server 803 does not successfully transmit the USI_P2P_Messaging_Req message to at least one terminal among the terminal # 2 to the terminal #Ns 805, 807,..., 809, the at least one terminal. The USI_P2P_Messaging_Req message may be retransmitted to obtain stability of transmission.

9 is a diagram illustrating a procedure for transmitting and receiving a message including text between heterogeneous network terminals according to an embodiment of the present invention.

Referring to FIG. 9, the communication system includes a terminal # 1 901, a USI server 903, an SMS / MMS server 905, and a cellular terminal # 1 907. Here, the terminal # 1 901 and the USI server 903 are included in a wireless broadband communication network, and the SMS / MMS server 905 and the cellular terminal # 1 907 are included in a cellular communication network. In this case, it is assumed that the IP address of the terminal # 1 901 is already registered in the USI server 903, and the terminal # 1 901 obtains identification information of the cellular terminal # 1 907 in advance. Assume that As shown in FIG. 1, the USI server 903 and the SMS / MMS server 905 may interwork with each other.

The terminal # 1 901 includes a text and transmits a USI_P2P_Messaging_Req message indicating the transmission of the text to the USI server 903 (step 909). The terminal # 1 901 transmits the USI_P2P_Messaging_Req message to the cellular terminal # 1 (907). Text and identification information of the cellular terminal # 1 907.

The identification information of the cellular terminal # 1 907 may be, for example, a telephone number of the cellular terminal # 1 907. In this case, the USI_P2P_Messaging_Req message may use the SIP-based message format.

The USI server 903 converts the USI_P2P_Messaging_Req message into a format supported by the cellular terminal # 1 907 to generate a first message, and generates the first message to the SMS / MMS server 905. Transmit (step 911).

To this end, the USI server 903 supports the communication interface standard of the SMS / MMS server 905 defined in 3GPP / OMA, etc., which is already standardized and thus is not specifically mentioned in the present invention.

The first message includes the identification information of the terminal # 1 901 as well as text of the cellular terminal # 1 907 and identification information of the cellular terminal # 1 907. The terminal # 1 901 identification information may be, for example, a USID unique to the terminal # 1 901, device information such as a medium access control address of the terminal # 1 901, user information, and the terminal # 1 901. ) Can be a telephone number.

The SMS / MMS server 905 checks the cellular terminal # 1 907 among all cellular terminals by using the identification information of the cellular terminal # 1 907 included in the first message, and checks the identified The first message is transmitted to cellular terminal # 1 907 (step 913).

The cellular terminal # 1 907 transmits a second message to the SMS / MMS server 905 in response to the first message. (Step 915) The second message transmits the first message. In order to indicate, transmission state information indicating a transmission success state or a transmission error state is included.

The SMS / MMS server 905 transmits the second message to the USI server 903 (step 917). The USI server 903 successfully transmits the USI_P2P_Messaging_Req message using the second message. Check whether it was sent. The USI server 903 transmits a USI_P2P_Messaging_Res message including the transmission status information indicating the transmission success status or the transmission error status to the terminal # 1 901 according to the confirmation (step 919). At this time, the USI_P2P_Messaging_Res The message may use the SIP based message format.

10 is a diagram illustrating a procedure for transmitting and receiving a message including text between heterogeneous network terminals according to another embodiment of the present invention.

Referring to FIG. 10, the communication system includes a terminal # 1 1001, a USI server 1003, an SMS / MMS server 1005, and a cellular terminal # 1 1007. The terminal # 1 1001 and the USI server 1003 are included in a wireless broadband communication network, and the SMS / MMS server 1005 and the cellular terminal # 1 1007 are included in a cellular communication network. In this case, it is assumed that the IP address of the terminal # 1 1001 is already registered in the USI server 1003, and the cellular terminal # 1 1007 previously obtained identification information of the terminal # 1 1001. Assume that As shown in FIG. 1, the USI server 1003 and the SMS / MMS server 1005 may interoperate with each other.

The cellular terminal # 1 1007 transmits a first message notifying transmission of an SMS / MMS message to the SMS / MMS server 1005. (Step 1009) The first message is sent to the terminal # 1 1001. The SMS / MMS message to be transmitted, identification information of the terminal # 1 1001 and identification information of the cellular terminal # 1 1007 are included.

The identification information of the terminal # 1 (1001) is, for example, a unique USID of the terminal # 1 (1001), device information such as a medium access control address of the terminal # 1 (1001), user information, the terminal # 1 ( 1001), or the like. The identification information of the cellular terminal # 1 1007 may be, for example, a telephone number of the cellular terminal # 1 1007.

The SMS / MMS server 1005 transmits the first message to the USI server 1003 (step 1011). The USI server 1003 uses the first message to transmit the first message. Confirm # 1 (1001), convert the first message into a format supported by the terminal # 1 (1001) to generate a USI_P2P_Messaging_Req message, and transmit the generated USI_P2P_Messaging_Req message to the terminal # 1 (1001). (Step 1013)

To this end, the USI server 1003 supports the communication interface standard of the SMS / MMS server 1005 defined in 3GPP / OMA, etc., which is already standardized and thus is not specifically mentioned in the present invention.

The USI_P2P_Messaging_Req message includes text converted from an SMS / MMS message transmitted to the terminal # 1 1001, identification information of the cellular terminal # 1 1007, and identification information of the terminal # 1 1001. In this case, the USI_P2P_Messaging_Rep message may use the SIP-based message format.

The UE # 1 1001 transmits a USI_P2P_Messaging_Res message to the USI server 1003 in response to the USI_P2P_Messaging_Req message. (Step 1015) The USI_P2P_Messaging_Res message indicates success of transmission of the USI_P2P_Messaging_Req message. Transmission status information indicating a status or a transmission error status. In this case, the USI_P2P_Messaging_Res message may use the SIP-based message format.

The USI server 1003 converts the USI_P2P_Messaging_Res message into a format supported by the cellular terminal # 1 1007, generates a second message, and transmits the second message to the SMS / MMS server 1005. (Step 1017)

11 is a diagram illustrating a file transmission and reception procedure between terminals according to an exemplary embodiment of the present invention.

Referring to FIG. 11, a P2P communication system includes a terminal # 1 1101, a USI server 1103, and a terminal # 2 1105. In this case, it is assumed that the IP addresses of the terminal # 1 1101 and the terminal # 2 1105 are already registered in the USI server 1103, and the terminal # 1 1101 is the terminal # 2 1105. Assume that you have obtained an IP address.

The terminal # 1 1101 transmits a file sharing request (USI_P2P_Filesharing_Request, hereinafter referred to as "USI_P2P_Filesharing_Req") message requesting file sharing to the terminal # 2 1105. (Step 1107) The USI_P2P_Filesharing_Req message. The terminal # 1 1101 includes information about a file to be transmitted. The information about the file includes a file size, a file type, a file name, and the like. In this case, the USI_P2P_Filesharing_Req message may use the SIP-based message format.

The terminal # 2 1105 transmits a file sharing response (USI_P2P_Filesharing_Response) message to the terminal # 1 1101 in response to the USI_P2P_Filesharing_Req message (step 1109). The USI_P2P_Filesharing message is transmitted. Indicates whether the USI_P2P_Messaging_Req message has been successfully transmitted, and includes transmission status information indicating a successful transmission status or a transmission error status for this purpose. In this case, the USI_P2P_Message_Res may use the SIP-based message format.

The terminal # 1 1101 connects with the terminal # 2 1105 through a TCP / IP session (step 1111), transmits a file to the terminal # 2 1105 (step 1113). When the transmission of the file is terminated, the communication connection of the TCP / IP session is released (step 1115).

In the above process, the communication between the terminal # 1 1101 and the terminal # 2 1105 is connected through a TCP / IP session, but the communication may be connected through another session.

12 is a diagram illustrating a procedure of a terminal transmitting a file to terminals different from the terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 12, the P2P communication system includes a terminal # 1 1201, a USI server 1203, and terminal # 2 to terminal #Ns 1205, 1207,..., 1209. At this time, the USI server 1203 assumes that the IP addresses of the terminal # 1 1201 and the terminal # 2 to the terminal #Ns 1205, 1207,..., 1209 are already registered, and the terminal # 1 ( Suppose 1201 acquires the IP addresses of the terminal # 2 to the terminal #N (1205, 1207, ..., 1209).

When the terminal # 1 1201 transmits the same file to the terminal # 2 through the terminal #Ns 1205, 1207,..., 1209, the terminal # 1 1201 sends a USI_P2P_Filesharing_Req message requesting file sharing to the USI server 1203. (Step 1211)

The USI_P2P_Filesharing_Req message includes information about a file to be transmitted to the terminal # 2 through terminal #Ns 1205, 1207,..., 1209 and the terminal # 2 through terminal #Ns 1205, 1207,..., 1209. Identification information is included. The information about the file includes a file size, a file type, a file name, and the like. The identification information of the terminal # 2 to the terminal #Ns 1205, 1207,..., 1209 may be, for example, USIDs of the terminal # 2 to the terminal #Ns 1205, 1207,..., 1209, and the terminal #. Device information such as medium access control addresses of 2 to terminal #Ns 1205, 1207,..., 1209, user information of the terminal # 2 to terminal #Ns 1205, 1207,. Phone numbers of the terminal # 2 to the terminal #Ns 1205, 1207,..., 1209, and the like. In this case, the USI_P2P_Filesharing_Req message may use the SIP-based message format.

The USI server 1203 stores the USI_P2P_Filesharing_Req message, and transmits a USI_P2P_Filesharing_Res message to the terminal # 1 1201 in response to the USI_P2P_Filesharing_Req message (step 1213). For this purpose, transmission state information indicating a transmission success state or a transmission error state is included. In this case, the USI_P2P_Filesharing_Res may use the SIP-based message format.

The terminal # 1 1201 connects with the USI server 1205 through a TCP / IP session (step 1215), transmits a file to the USI server 1203 (step 1217), and transmits the file. When the transmission ends, the communication connection of the TCP / IP session is released (step 1219).

The USI server 1203 stores the file and uses the identification information of the terminal # 2 to the terminal #Ns 1205, 1207,..., 1209 included in the USI_P2P_Filesharing_Req message. Check # 2 to UE #Ns 1205, 1207,..., 1209. The USI server 1203 transmits a USI_P2P_Filesharing_Req message requesting sharing of the file to the terminal # 2 1205 (step 1221).

The terminal # 2 1205 transmits a USI_P2P_Filesharing_Res message to the USI server 1203 in response to the USI_P2P_Filesharing_Req message (step 1223).

The USI server 1203 then communicates with the terminal # 2 1205 through a TCP / IP session (step 1225), and transmits the file to the terminal # 2 1205 (step 1227). When the transmission of the file is terminated, the communication connection of the TCP / IP session is released (step 1229).

The USI server 1203 transmits a USI_P2P_Filesharing_Req message requesting sharing of the file to the terminal # 3 1207. Is transmitted to the USI server 1203 (step 1233).

The USI server 1203 connects to the terminal # 3 1207 through a TCP / IP session (step 1235), and transmits the file to the terminal # 3 1207 (step 1237). When the transmission of the file is finished, the communication connection of the TCP / IP session is released (step 1239).

The USI server 1203 transmits a USI_P2P_Filesharing_Req message requesting sharing of the file to the terminal #N 1209. Is transmitted to the USI server 1203 (step 1243).

The USI server 1203 connects with the terminal #N 1209 through a TCP / IP session (step 1245), and transmits the file to the terminal #N 1209 (step 1247). When the transmission of the file is finished, the communication connection of the TCP / IP session is released (step 1249).

Through the above process, the terminal # 1 1201 transmits the file to each of the terminal # 2 through the terminal #Ns 1205, 1207,..., 1209 through the USI server 1203.

The USI server 1203 also uses the USI_P2P_Filesharing_Res messages received from each of the terminal # 2 through the terminal #Ns 1205, 1207,..., And 1209. The terminal # 2 through the terminal #Ns 1205, 1207,... 1209) Whether each of the USI_P2P_Filesharing_Req messages has been successfully transmitted is checked.

If the USI server 1203 successfully transmits the USI_P2P_Filesharing_Req messages, the USI server 1203 transmits a USI_P2P_Filesharging_Res message including transmission status information indicating a successful transmission state to the terminal # 1 1201 (step 1125).

In contrast, when the USI server 1203 does not successfully transmit the USI_P2P_Filesharing_Req message to at least one of the terminal # 2 to terminal #Ns 1205, 1207,..., 1209, the at least one terminal. It is possible to obtain the stability of the transmission by retransmitting the USI_P2P_Filesharing_Req message to a predetermined number of times so that the file can be transmitted.

13 is a diagram illustrating an IP address management table according to an embodiment of the present invention.

Referring to FIG. 13, the IP address management table includes terminal identification information 1301, an IP address 1303, and IP address request terminal identification information 1305.

The terminal identification information 1301 is a field for storing identification information of an arbitrary terminal. For example, the terminal identification information 1301 may store identification information of the terminal # 1. The IP address 1303 is a field for storing the IP address of the arbitrary terminal. For example, when the IP address of the terminal # 1 is 0.00.0, the IP address 1303 is 0. 0. 0. 0 can be stored. The IP address request terminal identification information 1305 is a field for storing identification information of the terminal that has requested the IP address update of the arbitrary terminal. For example, the terminal # 2 is requested by the terminal that has requested the IP address update of the terminal # 1. For the terminal # 3 and the terminal # 4, the IP address request terminal identification information 1305 may store identification information of the terminal # 2, identification information of the terminal # 3, and identification information of the terminal # 4.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made 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 determined not only by the scope of the following claims, but also by the equivalents of the claims.

1 illustrates a structure of a P2P communication system according to an exemplary embodiment of the present invention.

2 is a diagram illustrating an internal structure of a USI server according to an embodiment of the present invention.

3A is a diagram illustrating an internal structure of a terminal according to an embodiment of the present invention.

3B is a diagram illustrating a structure of a P2P service platform according to an embodiment of the present invention.

4 is a system diagram illustrating a procedure in which a terminal registers its IP address in a USI server through ACR / BSS according to an embodiment of the present invention.

5 is a diagram illustrating a procedure of acquiring an IP address of a terminal different from the terminal according to the first embodiment of the present invention;

6 is a diagram illustrating a procedure of acquiring an IP address of a terminal different from the terminal according to a second embodiment of the present invention;

7 is a diagram illustrating a procedure of a terminal transmitting a message to a terminal different from the terminal according to an embodiment of the present invention.

8 is a diagram illustrating a procedure of a terminal transmitting a message to terminals different from the terminal according to an exemplary embodiment of the present invention.

9 is a diagram illustrating a procedure of a terminal transmitting a message to a cellular terminal according to an exemplary embodiment of the present invention.

FIG. 10 is a flowchart illustrating a procedure for receiving a message from a cellular terminal by a terminal according to an exemplary embodiment of the present invention.

11 is a diagram illustrating a procedure of a terminal transmitting a file to a terminal different from the terminal according to an exemplary embodiment of the present invention.

12 is a diagram illustrating a procedure of a terminal transmitting a file to terminals different from the terminal according to an exemplary embodiment of the present invention.

 13 is a diagram illustrating an IP address management table according to an embodiment of the present invention.

Claims (28)

In a communication system using a peer to peer (P2P: Peer To Peer) method, a method for transmitting and receiving a signal, Universal Service Interface (USI) server is a process for performing IP (Internet Protocol) address registration with at least one terminal, Transmitting, by a first terminal of the at least one terminal, a first message requesting transmission of an IP address of a second terminal different from the first terminal to the USI server; And the first terminal receives a second message including the IP address of the second terminal, the identifier of the second terminal, and a return code indicating that the IP address search is completed from the USI server. . The method of claim 1, Receiving, by the USI server, a third message requesting transmission of an updated IP address every time an IP address of a fourth terminal is updated from a third terminal among the at least one terminal; A fourth message including a return code indicating that the updated IP address of the fourth terminal and the updated IP address will be provided each time the IP address of the fourth terminal is updated every time the IP address of the fourth terminal is updated to the third terminal; Signal transmitting and receiving method further comprising the step of transmitting. The process of claim 1, wherein the USI server performs IP address registration with the at least one terminal. Receiving a fifth message including an identifier and an IP address of the at least one terminal from the at least one terminal; And transmitting a sixth message including a return code indicating that IP address registration is completed to the at least one terminal. The process of claim 1, wherein the USI server performs IP address registration with the at least one terminal. Receiving a seventh message including an identifier and IP address of the at least one terminal from an access control router / base station station (ACR / BSS); And transmitting an eighth message including a return code indicating that IP address registration is completed to the access control router / base station station (ACR / BSS). In a communication system using a peer-to-peer (P2P) method, a method for transmitting and receiving a signal including text, The Universal Service Interface (USI) server may be configured to receive a first message including text from at least one terminal; Transmitting, by the USI server, a first message including the text to each of at least one terminal except for the at least one terminal; Receiving a second message including whether the first message has been successfully transmitted from each of at least one terminal other than the at least one terminal; And transmitting the second message to the at least one terminal. The method of claim 5, And the first message includes an identifier of the at least one terminal. The method of claim 6, The identifier means at least one of the media access control address, telephone number, user information of the at least one terminal. The method of claim 5, And the first message and the second message are Session Initiation Protocol (SIP) based messages. The method of claim 5, When the at least one terminal and at least one other terminal except for the at least one terminal are terminals located in different communication networks, the USI server transmitting the first message to a messaging server (SMS / MMS). and, And receiving the second message from the messaging server. In a communication system using a peer-to-peer (P2P) method, a first terminal transmits and receives a signal for transmitting a file. Obtaining an IP address of a second terminal from a universal service interface (USI) server, Transmitting a first message including file information to be transmitted to the second terminal using the obtained IP address; Receiving a second message, which is a response message to the first message, from the second terminal; Connecting communication with the second terminal; And transmitting a file to the second terminal. The method of claim 10, And the first message and the second message are session initiation protocol (SIP) based messages. In a communication system using a peer-to-peer (P2P) method, a signal transmission / reception method for file transmission, The first terminal is a process of obtaining an IP address of at least one terminal except for the first terminal from a Universal Service Interface (USI) server, The first terminal transmitting a first message including file information to be transmitted to at least one terminal except the first terminal to the USI server; The first terminal receiving a second message, which is a response message to the first message, from the USI server; The first terminal transmitting a file to the USI server through a TCP / IP communication connection with the USI server; The USI server transmitting and receiving the first message and the second message to each of at least one terminal except for the first terminal; And transmitting the file to each of the at least one terminal except the first terminal through a TCP / IP communication connection with each of the at least one terminal except the first terminal. The method of claim 12, And the first message and the second message are session initiation protocol (SIP) based messages. The method of claim 12, The USI server releasing a TCP / IP communication connection with each of at least one terminal except the first terminal; And transmitting, by the USI server, a third message including information on whether the file transmission is normally performed to the first terminal. In a communication system using a peer to peer (P2P: Peer To Peer) scheme, At least one terminal and a USI (Universal Service Interface) server, The USI server performs IP (Internet Protocol) address registration with the at least one terminal, A first terminal of the at least one terminal transmits a first message requesting transmission of an IP address of a second terminal different from the first terminal to the USI server, and the IP address of the second terminal from the USI server, And a second message including an identifier of the second terminal and a return code indicating that an IP search has been completed. The method of claim 15, The USI server receives a third message requesting transmission of an updated IP address every time an IP address of a fourth terminal is updated from a third terminal among the at least one terminal, and updates the IP address of the fourth terminal to the third terminal. And a fourth message including a forwarding code indicating that the updated IP address of the fourth terminal and the updated IP address will be provided each time the IP address of the fourth terminal is updated. The method of claim 15, The USI server receives a fifth message including the identifier and the IP address of the at least one terminal from the at least one terminal, and includes a return code indicating that the IP address registration is completed with the at least one terminal. A communication system, characterized by sending a message. The method of claim 15, The USI server receives a seventh message including an identifier and an IP address of the at least one terminal from an access control router / base station station (ACR / BSS), and receives the access control router / base station station (ACR / BSS). And an eighth message including a return code indicating that the IP address registration has been completed. In a communication system using a peer to peer (P2P: Peer To Peer) scheme, At least one terminal, including a Universal Service Interface (USI) server, The USI server receives a first message including text from at least one terminal, transmits a first message including the text to each of at least one terminal except for the at least one terminal, and And a second message including whether the first message has been successfully transmitted from each of at least one terminal except at least one terminal, and transmits the second message to the at least one terminal. . The method of claim 19, And the first message includes an identifier of the at least one terminal. The method of claim 20, And the identifier means at least one of a media access control address, a telephone number, and user information of the at least one terminal. The method of claim 19, And the first message and the second message are Session Initiation Protocol (SIP) based messages. The method of claim 19, When the at least one terminal and at least one other terminal except for the at least one terminal are terminals located in different communication networks, The USI server transmits the first message to a messaging server (SMS / MMS) and receives the second message from the messaging server. In a communication system using a peer to peer (P2P: Peer To Peer) scheme, A first terminal, a second terminal, and a universal service interface (USI) server, The first terminal acquires an IP address of the second terminal from the USI server, and transmits a first message including file information to be transmitted to the second terminal using the obtained IP address. And receiving a second message, which is a response message to the first message, from the second terminal, connecting a communication with the second terminal, and transmitting a file to the second terminal. The method of claim 24, And the first message and the second message are Session Initiation Protocol (SIP) based messages. In a communication system using a peer to peer (P2P: Peer To Peer) scheme, At least one terminal and a USI (Universal Service Interface) server, The first terminal of the at least one terminal obtains an IP (IP) address of at least one terminal except the first terminal from the USI server, and transmits to the at least one terminal except the first terminal to the USI server A first message including file information to be transmitted is received, a second message, which is a response message to the first message, is received from the USI server, and a TCP / IP communication connection is established with the USI server. Send a file to the USI server via The USI server transmits and receives each of the at least one terminal except the first terminal and the first message and the second message, respectively, and the TCP / IP communication connection with each of the at least one terminal except the first terminal. And a file is transmitted to each of at least one terminal except for the first terminal. The method of claim 26, And the first message and the second message are Session Initiation Protocol (SIP) based messages. The method of claim 26, The USI server releases a TCP / IP communication connection with each of at least one terminal except the first terminal, and transmits a third message including information on whether the file transmission is normally performed to the first terminal. Communication system.

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