KR100508650B1 - Method for establishing tcp/ip session using extended session initiation protocol for peer to peer service between communication terminals - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a TPC / IP session establishment method using an extended SIP for a peer-to-peer service of a communication terminal period.

2. The technical problem to be solved by the invention

An object of the present invention is to provide a peer-to-peer peer-to-peer application application service base between wireless mobile terminals by establishing a TCP / IP session between wireless mobile terminals using an extended SIP message.

3. Summary of Solution to Invention

The present invention relates to a method for establishing a TCP / IP session using an SIP in a communication system, wherein an originating side wireless mobile terminal attempts to originate using an extended SIP. Is assigned an IP address from an IP address assignment means, the assigned IP address, an identification number of a called-party wireless mobile terminal, a TCP port number of an application running in the calling-party wireless mobile terminal, and TPC / IP ( TCP / IP) When an INVITE message including information indicating that session establishment is required is generated and transmitted to the SIP server, the SIP server sends the terminal location registration means to the terminal location registration means based on the identification number of the called party's wireless mobile terminal. Querying to obtain location information of the called-party wireless mobile terminal; And the SIP server transmits the invite message to the called wireless mobile terminal based on the location information of the called wireless mobile terminal, so that the called wireless mobile terminal is assigned an IP address from the IP address assignment means. In response to the invite message, an OK message is generated and transmitted to the calling mobile wireless terminal through the SIP server, and the calling wireless mobile terminal receiving the OK message is acknowledged. Generates an (ACK) message and transmits it to the called wireless mobile terminal through the SIP server, wherein the called wireless terminal is the IP address and TCP port number of the calling wireless mobile terminal included in the invite message. And the originating wireless mobile terminal by using the information indicating that the TPC / IP session is required. For establishing a peer Ti ssipi / IP session, the peer-to-system comprises ever goes to the three-way handshaking process connection.

4. Important uses of the invention

The present invention is used in a peer-to-peer service in a communication system.

Description

METHOD FOR ESTABLISHING TCP / IP SESSION USING EXTENDED SESSION INITIATION PROTOCOL FOR PEER TO PEER SERVICE BETWEEN COMMUNICATION TERMINALS}

The present invention relates to a method for establishing a TCP / IP session using an extended session initiation protocol (SIP) for a peer-to-peer service. In the present invention, Extended Session Initiation Protocol (SIP) refers to a protocol that contains information for establishing a TCP / IP session and application information in an existing SIP, and means that an existing SIP is extended according to the present invention. do.

In the past, second-generation or 2.5-generation CDMA (Code Division Multiple Access) wireless networks provided voice-oriented services, whereas in the current third-generation wireless networks, the need for high-speed multimedia services is emerging. In the 3G wireless network environment, SIP is adopted as a communication standard for voice and high-speed multimedia services.

The client-server model, the current method of communicating over the Internet, has grown in size since 1994, resulting in bandwidth shortages and allowing anyone, not just one particular person, to use resources on the Internet.

However, society has become more specialized and has the urge to free communication between specialized groups, and the need for research on peer-to-peer has emerged as a way to overcome them.

On the other hand, looking at the Internet content, most of them are TCP / IP-based, and as in the case of the client-server model, when the client requests information from the client, the server responds to the server and provides the corresponding information.

This has the advantage of easy management of clients on the server, while overloading the server, and the consistency of dictionary information such as IP address, port, software, etc. There is a problem that the service can be guaranteed.

In the meantime, the SIP protocol proposed by the IETF (International Engineering Task Force) makes it easy to find the location of the terminal while accepting the current Internet network, and to easily set up the call in Voice over IP (VoIP). Because of this, a lot of research is going on.

Currently, discussions have been made about the interworking between wireless mobile terminals, the Internet, mobile communication networks, and public switched telephone networks (PSTNs) according to the SIP protocol. In the case of services using such networks, most of them are for real-time services. As the real time service method, there is an Internet phone service, a video communication, and the like.

Conventionally, many services on a wired line are made through TCP / IP. As an example, the Korean Patent Application Publication discloses an Internet phone service system and a method thereof using a public switched network terminal (application number: 10-2000-0012166). have. The prior art relates to an Internet phone service system using a terminal connected to a public switched network (PSTN, ISDN), and operates an Internet phone according to a call origination request of a user, sends information about the same to a server, and then contacts the other party. After the exchange of information with each other depending on whether the operation of the Internet phone can be communicated with each other. However, it basically mentions wired internet phone services.

Accordingly, there is a need for a new method for establishing a peer-to-peer TCP / IP session in a wireless communication system using a SIP protocol in which each terminal operates as a client / server.

The present invention has been proposed to solve the above problems, and provides a peer-to-peer peer-to-peer application application service base between wireless mobile terminals by establishing a TCP / IP session between wireless mobile terminals using an extended SIP message. have.

Another object of the present invention is to provide a method for establishing a TCP / IP session between a wireless mobile terminal and a fixed terminal of the Internet using an extended SIP message.

In addition, another object of the present invention is to provide a method for establishing a TCP / IP session through an extended SIP message with a wireless mobile terminal that does not access a specific server providing an out-dialing function. have.

In addition, the present invention transmits information for establishing a TCP / IP session in the extended SIP message for the peer-to-peer application service in the communication terminal period to perform 3-way handshaking of the SIP message. Another object of the present invention is to provide a method for establishing a TCP / IP session after performing handshaking on a 2-way or a 2-way method for a SIP message. Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In order to achieve the above object, the present invention provides a method for establishing a TCP / IP session using an SIP in a communication system, and using an extended SIP. The originating wireless mobile terminal attempting to obtain the IP address is assigned an IP address from the IP address assignment means, the assigned IP address, the identification number of the called wireless mobile terminal, and the TCP of the application running in the calling wireless mobile terminal. When an INVITE message including a port number and information indicating that a TCP / IP session is required to be generated is transmitted to the SIP server, the SIP server identifies the identification number of the called wireless mobile terminal. Obtaining location information of the called party's wireless mobile terminal by querying the terminal location registration means based on; And the SIP server transmits the invite message to the called wireless mobile terminal based on the location information of the called wireless mobile terminal, so that the called wireless mobile terminal is assigned an IP address from the IP address assignment means. In response to the invite message, an OK message is generated and transmitted to the calling mobile wireless terminal through the SIP server, and the calling wireless mobile terminal receiving the OK message is acknowledged. Generates an (ACK) message and transmits it to the called wireless mobile terminal through the SIP server, wherein the called wireless terminal is the IP address and TCP port number of the calling wireless mobile terminal included in the invite message. And the originating wireless mobile terminal by using the information indicating that the TPC / IP session is required. Characterized by comprising the step of including ever goes to the three-way handshaking connection process for establishing a peer Ti ssipi / IP session of the to-peer manner.

In addition, the present invention provides a method for establishing a TCP / IP session using an SIP in a communication system, wherein the calling party attempts to make a call using an extended SIP. The mobile terminal receives an IP address from the IP address assignment means, the assigned IP address, the identification number of the called stationary terminal connected to the wired communication network, and the TCP port of the application running on the originating wireless terminal. When generating an INVITE message including a number and information indicating that a TCP / IP session is required to be transmitted to the SIP server, the SIP server is based on the identification number of the called party's fixed terminal. The invite message is transmitted to the called party's fixed terminal, and the called party's fixed terminal generates an OK message in response to the invite message. To send to the calling party wireless mobile terminal through the SIP server, and the calling party wireless mobile terminal receiving the OK message generates an ACK message and fixes the called party through the SIP server. Send to the terminal, and the called party fixed terminal uses the IP address and TCP port number of the originating wireless mobile terminal included in the invite message, and information indicating that a TPC / IP session is required. And a three-way handshaking connection process for establishing a peer-to-peer type TPC / IP session with the wireless terminal.

In addition, the present invention is a method for establishing a TCP / IP session using a SIP in a communication system, wherein a fixed terminal connected to a wired communication network has its IP address and a called party The SIP server generates an INVITE message including an identification number of the wireless mobile terminal, a TCP port number of an application running on the calling station fixed terminal, and information indicating that a TCP / IP session is required. Transmitting, by the SIP server, to the terminal location registration unit based on the identification number of the called party wireless mobile terminal to obtain location information of the called party wireless mobile terminal; And the SIP server transmits the invite message to the destination wireless mobile terminal based on the location information of the destination wireless mobile terminal, and the destination wireless mobile terminal is assigned an IP address from an IP address assignment means. In response to the invite message, an OK message is generated and transmitted to the calling station fixed terminal through the SIP server, and the calling station fixed terminal receiving the OK message is acknowledged. A message is generated and transmitted to the called-party wireless mobile terminal through the SIP server, and the called-party wireless mobile terminal transmits the IP address, TCP port number, and TPC / A peer-to-peer type TC with the calling station's fixed terminal using information indicating that an IP session is required / Including the step of ever goes to the three-way handshaking connection process for establishing an IP session is characterized in that is made.

The present invention also provides a method for establishing a TCP / IP session using a SIP in a communication system, wherein the calling wireless terminal connected to a network server communicates through a SIP server. When the access request information is transmitted, including the identification number of the called-party wireless mobile terminal not connected to the network server, the network server registers the terminal location based on the identification number of the called-side wireless mobile terminal through the SIP server. Obtaining location information of the called-party wireless mobile terminal by inquiring; The network server generates an invite message including an identification number of the called-party wireless mobile terminal, a TCP port number of an application, and information indicating that a TPC / IP session is required, and converts the invite message into the location information. Transmitting to the called wireless mobile terminal through the SIP server by using; And when the called-party wireless mobile terminal is assigned an IP address from an IP address assignment means, generates an OK message in response to the invite message, and transmits an OK message to the network server through the SIP server. OK) The network server receiving the message generates an ACK message and transmits it to the called wireless mobile terminal through the SIP server, and the called wireless terminal sets the TCP port number and the TPC / IP session. And a three-way handshaking connection process for establishing a peer-to-peer TPC / IP session with one of the network server and the calling terminal using the information indicating that the request is required. Characterized in that made.

The present invention also provides a method for establishing a TCP / IP session using a SIP in a communication system, wherein the calling party attempts to make a call using an extended SIP. The mobile terminal is assigned an IP address from the IP address assignment means, the assigned IP address, the identification number of the called wireless mobile terminal, the TCP port number of the application running in the calling wireless mobile terminal, and TCP / IP (TCP). / IP) When an INVITE message including session setup information is generated and transmitted to a SIP server, the SIP server inquires to a terminal location registration means based on an identification number of the called party's wireless mobile terminal. Obtaining location information of the wireless mobile terminal; And the SIP server transmits the invite message to the called wireless mobile terminal based on the location information of the called wireless mobile terminal, so that the called wireless mobile terminal is assigned an IP address from the IP address assignment means. A peer-to-peer type TIP / IP session with the originating wireless terminal using IP address, TCP port number, and TPC / IP session setting information of the originating wireless mobile terminal included in the invite message. It characterized in that it comprises a step to proceed to the 3-way handshaking connection process for setting the.

The present invention also provides a method for establishing a TCP / IP session using a SIP in a communication system, wherein the calling party attempts to make a call using an extended SIP. The mobile terminal is assigned an IP address from the IP address assignment means, the assigned IP address, the identification number of the called wireless mobile terminal, the TCP port number of the application running in the calling wireless mobile terminal, and TCP / IP (TCP). / IP) When an INVITE message including session setup information is generated and transmitted to a SIP server, the SIP server inquires to a terminal location registration means based on an identification number of the called party's wireless mobile terminal. Obtaining location information of the wireless mobile terminal; And the SIP server transmits the invite message to the called wireless mobile terminal based on the location information of the called wireless mobile terminal, so that the called wireless mobile terminal is assigned an IP address from the IP address assignment means. In response to the invite message, the assigned own IP address, the identification number of the originating wireless mobile terminal, the TCP port number of the application running on the called-party wireless mobile terminal, and TCP / IP (TCP / IP) generates an OK message including session setup information and transmits it to the calling party's wireless mobile terminal through the SIP server, and the called party's wireless mobile terminal includes the called message included in the OK message. The called party radio using the IP address, TCP port number, and TPC / IP session setting information of the Including the step of ever goes to 1-way handshaking connection procedure for establishing a tee ssipi / IP session in a peer-to-peer with the same device characterized in that is made.

Here, the TCP / IP session configuration information included in the invite message and the OK message may include a TCP port number (Transport Address), information indicating that the TCP / IP session configuration is required, an initialization sequence, an initialization sequence, It is configured to include an urgent point and a window size.

In addition, the wireless mobile terminal incorporates an extended SIP protocol function and a TPC / IP protocol function.

In addition, the extended SIP, it is preferable to write the information for establishing the TPC / IP session between the wireless mobile terminal in the media description information field of the AP message.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, methods for establishing a TCP / IP session using an extended SIP (SIP) for a peer-to-peer service of a communication terminal period according to preferred embodiments of the present invention are attached. It will be described in detail with reference to the drawings.

1 is a network structure diagram for establishing a TCP / IP session using an extended SIP for a peer-to-peer service between wireless mobile terminals according to the present invention. .

Referring to FIG. 1, the network of the first embodiment of the present invention includes a SIP server / PDSN 100, a location registration server 200, and a plurality of wireless mobile terminals 10,20.

The SIP server / PDSN 100 consists of a SIP server and a PDSN. The SIP server is an application server that receives and responds to a SIP request from the wireless mobile terminals 10 and 20 and is a server that provides both TCP / IP and User Datagram Protocol (UDP). In particular, in the present embodiment, a TCP / IP session is established between the calling wireless terminal 10 and the called wireless terminal 20 by forwarding an extended SIP message generated by the wireless mobile terminal to another wireless mobile terminal. Use it in the process. Therefore, the SIP server according to the present embodiment is a server capable of processing not only the existing SIP but also the extended SIP according to the present invention.

In the present invention, information for establishing a TCP / IP session between the wireless mobile terminals 10 and 20 is signaled through an extended SIP message, and after the TCP / IP session is established between the wireless mobile terminals 10 and 20, the wireless mobile terminal. The TCP / IP compliant application of (10, 20) sends and receives data based on the TCP / IP session, so that the signaling message path and the media path are independent.

Therefore, the applications of the wireless mobile terminals 10 and 20 can transmit and receive various data based on the TCP / IP of the connection-oriented mode, which is more reliable than the existing UDP, and is easy to control and multiplex in flow control. Will be. The application may be a program embedded in the wireless mobile terminals 10 and 20 and may be a multimedia communication support program that supports voice, games, and chat.

In addition, the PDSN of the SIP server / PDSN 100 is a PPP for each wireless mobile terminal 10 and 20 when the wireless mobile terminal 10 attempts to connect as a calling party or when a connection is required as the called party 20. (Point to Point Protocol) establishes a connection and assigns an IP address to the wireless mobile terminals 10 and 20 so as to be uniquely identified on the Internet.

The location registration server 200 maps the telephone number of the destination wireless mobile terminal 20 to the SIP ID (ID) when the calling party wireless mobile terminal 10 specifies and dials the called party wireless mobile terminal 20. This is a server that allows users to perform ENUM (Telephone Number Mapping) server function. Therefore, when a user attempts to make a call by specifying the called party's wireless mobile terminal 20, the user calls with the called party's wireless mobile terminal 20 without using the URL assigned to the called party's wireless mobile terminal 20. Can be set.

The ENUM server function may be omitted when an application embedded in the calling party's wireless mobile terminal 10 directly maps and generates a SIP ID including the phone number of the called party's wireless mobile terminal 20.

In addition, when the location registration server 200 receives a request for the location of the called party wireless mobile terminal 20 from the SIP server 100, the SIP server 100 provides information on the location of the called party wireless mobile terminal 20. To send. Therefore, the location registration server 200 is preferably configured to include a device or software that interoperates with a subscriber location registration device (HLR: Home Location Register) operating in an existing wireless mobile communication network or performs a subscriber location registration function.

The wireless mobile terminals 10 and 20 refer to personal portable wireless communication terminals, and are terminals having an extended SIP function and a client / server function of TCP / IP according to the present invention. Accordingly, the wireless mobile terminals 10 and 20 may generate an extended SIP message including TCP / IP session setting information and transmit the extended SIP message to other wireless mobile terminals 10 and 20 via the SIP server 100. By using the established TCP / IP session configuration information, it is possible to establish a TCP / IP session.

2 is an explanatory diagram showing an extended SIP stack according to the present invention. Referring to FIG. 2, an extended SIP according to the present invention is based on TCP / IP, and a TCP / IP session is established for a peer-to-peer service between wireless mobile terminals 10 and 20 according to the present invention. It may include additional information. The relationship between the general SIP message and the extended SIP according to the present invention will be described in more detail.

In general, SIP messages are divided into SIP request messages and response messages, and request messages include INVITE, ACK, BYE, CANCEL, and REGISTER. And 6 methods of OPTION, and response message is 1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Clint Error), 5xx (Sever Error), 6xx (Global Error) )

The SIP message consists of a start line, a message header and a message body. The message body is described as a Session Description Protocol (SDP), and information for session establishment is described, and its configuration includes a session information description section, a time description section, and a media description section. The media description of the message body part may include information as shown in Table 1 below.

field Field description Remarks m Media Name and TCP Port Number necessary i Media title option c Connection Information necessary b Bandwidth information option k Encryption Key option a Media characteristics option In the extended SIP according to the present invention, information for establishing a TCP / IP session between terminals is preferably included in the media description unit described in Table 1 above. Accordingly, the extended SIP according to the present invention has a structure in which information for establishing a TCP / IP session of the wireless mobile terminals 10 and 20 is added to the media description unit of the message body without changing the existing SIP. A detailed example in which information for establishing a TCP / IP session between the wireless mobile terminals 10 and 20 is described in the media description unit will be described in more detail below.

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According to the present invention, a method for establishing a TCP / IP session using an extended SIP includes: (1) when establishing a TCP / IP session between a wireless mobile terminal and a wireless mobile terminal, and (2) accessing the wireless mobile terminal and the Internet. When establishing a TCP / IP session between a fixed terminal (for example, a personal computer or a server providing a specific application service), (3) the wireless mobile terminal dials out through a network server to establish a TCP / IP session with another wireless mobile terminal. In case of establishing a session, (4) when establishing a TCP / IP session between wireless mobile terminals by performing SIP handshaking in a 1-way manner using an extended SIP, (5) a wireless mobile terminal. In some periods, two-way SIP handshaking may be used to set TCP / IP sessions to only one-way handshaking instead of three-way handshaking. Can be.

Hereinafter, a method of establishing a TCP / IP session based on an extended SIP in a wireless mobile communication system according to the present invention will be described separately from the existing SIP.

Referring to FIG. 1, in order to communicate, the originating wireless terminal 10 first establishes a PPP connection with the PDSN 100 and receives an IP address from the PDSN 100.

The caller inputs the telephone number of the called party's wireless mobile terminal 20 instead of the SIP ID to specify the called party's wireless mobile terminal 20. Accordingly, the calling party's wireless mobile terminal 10 determines the called party's wireless mobile terminal ( 20 generates an INVITE message including the telephone number and transmits it to the SIP server 100 (S101).

The invite message may be configured, for example, as shown in Table 2 below.

division field Contents Start line INVITE sip: 82162202100@ktf.co.kr; user = phone SIP / 2.0 Message header Via SIP / 2.0 UDP 100.101.102.103:5060 To sip: 82162202100@ktf.co.kr; user = phone From sip: 82114104500@sktelecom.com; user = phone Call-id 10@100.101.102.103 Cseq 1 INVITE Subject This is TCP connection. Content-Type application / sdp Content-length ... Message body Session Information Technology Department v 0 o 82114104500 2890844526 2890844526 IN IP4 100.101.102.103 s TCP connection c IN IP4 100.101.102.103 Time engineering department t 0 0 Media Technology Department m application 49170 TCP chatting Referring to [Table 2], the 'INVITE' field of the start line indicates that the message is a request message, 'sip 82162202100@ktf.co.kr; user = phone SIP / 2.0 'is a telephone number of the called party's wireless mobile terminal 20 to which the caller wants to set up a call,' 016-220-2100 ', and the called party's wireless mobile terminal 20 using SIP / 2.0. Indicates that a call is attempted.

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Here, 'sip: 82162202100@ktf.co.kr; user = phone 'is a SIP ID that matches the telephone number of the called party's wireless mobile terminal 20, and means that the calling party's wireless mobile terminal 10 performs the ENUM function in the invite message. Therefore, in this case, as described above, the ENUM function of the location registration server 200 may be omitted, and the calling party's wireless mobile terminal 10 is assigned by the calling user to the telephone number of the called party's wireless mobile terminal 20. For example, if 016-220-2100 is inputted, the telephone number is converted into a SIP ID (for example, 'sip 82162202100@ktf.co.kr') to generate an invite message.

When the location registration server 200 provides a function of mapping the telephone number of the called party wireless mobile terminal 20 to the SIP ID, the calling party wireless mobile terminal 10 does not perform a separate SIP ID conversion function. An invite message including a telephone number of the side wireless mobile terminal 20, for example, '82162202100' may be generated.

In this case, the SIP server 100 receiving the invite message including the telephone number of the called party wireless mobile terminal 20 transmits the SIP ID for the called party's telephone number included in the invite message to the location registration server 200. ), Modify the called party's telephone number in the 'INVITE' field of the invite message to the provided SIP ID.

Next, when describing the message header, there may be one or more 'Via' fields. When the 'via' field is one in the message as shown in [Table 2], the 'via' field is associated with its own IP address. If two or more 'via' fields exist, the 'via' field (s) described earlier indicates the IP address and port number of the waypoint, and the last 'via' field indicates Indicate the IP address and port number. In [Table 2], since the 'via' field is one, the IP address and port number of the requester (that is, the originating wireless mobile terminal 10) requesting the invite request message are indicated. That is, 'SIP / 2.0 UDP 100.101.102.103:5060' means that the originating wireless terminal 10 transmits the invite message through the '5060' port with the '100.101.102.103' IP address.

In addition, the 'To' field indicates the responder of the invite request (ie, the called-party wireless mobile terminal 20), and includes' sip: 82162202100@ktf.co.kr; user = phone 'has the same meaning as described above in the beginning line.

Also, the 'From' field indicates the requestor of the invite message, and thus' sip: 82114104500@sktelecom.com; user = phone 'indicates that the telephone number of the originating wireless terminal 10 is' 011-410-4500'.

In addition, '10 @ 100.101.102.103 'in the' Call-ID 'field is the only ID generated by the calling party's mobile terminal 10 to distinguish the telephone call, and' 1 INVITE 'in the' Cseq 'field is the same. Call Sequence for Call ID (ie, '10 @ 100.101.102.103 '), which is incremented by one when there is a new request message for the same Call ID.

In addition, the 'Subject' field is a request header indicating the nature of the call, so 'This is TCP connection' means that the call requested by the calling party's mobile terminal 10 to the called party's wireless mobile terminal 20 is TCP / IP. Indicates session setup call.

In addition, 'application / sdp' in the 'Content-Type' field indicates the media type of the invite message body, and 'Content-Length' indicates the length of the invite message body.

Next, referring to the message body, the 'v' field of the session information description unit indicates a protocol version. The 'o' field indicates a message creator / session identifier. The message creator has a telephone number of "011-410-4500", an IP address of "100.101.102.103", and a session of "28908445226." ". In addition, the 's' field indicates a session name. In addition, the 'c' field indicates connection information, '100.101.102.103' indicates the requestor who requested the message (that is, the IP address of the originating wireless mobile terminal 10), and the ' The t 'field indicates the time at which the session is activated, and the' m 'field of the media description unit indicates a media name and a TCP port number, respectively.

In particular, in the extended SIP message according to the present invention, the session to be established between the wireless mobile terminals 10 and 20 by adding 'application 49170 TCP chatting' to the 'm' field of the message body is a peer-to-peer type TCP / IP session. Indicates. In the above description, '49170' represents a TCP port number of an application running in the calling party's wireless mobile terminal 10, and 'chatting' refers to a call requested by the calling party's wireless mobile terminal 10 to the called party's wireless mobile terminal 20. Represents a media name.

As described above, the wireless mobile terminals 10 and 20 incorporate SIP protocol functions and client / server functions of TCP / IP, and the application programs implemented in the wireless mobile terminals 10 and 20 are the above protocols. It can communicate with the application program of the server or other wireless mobile terminal based on the network.

After the user runs the application program on the calling party's wireless mobile terminal 10, the user may input the telephone number of the called party's wireless mobile terminal 20 in the same manner as in the conventional wireless mobile terminal. The calling party's wireless mobile terminal 10 according to the present invention recognizes the telephone number of the called party's wireless mobile terminal 20, which is normally input, as an attempt to establish an existing voice radio call, and processes the same as the existing voice call setting method. If the telephone number of the called-party wireless mobile terminal 20 is input through the interface provided to the user after the application is run, it is determined that the call is set up using the extended SIP according to the present invention.

Therefore, the calling party wireless mobile terminal 10 receives a SIP message configured as shown in [Table 2] when the telephone number of the called party wireless mobile terminal 20 is input through the interface provided to the user after the application program is driven. Byte message) is generated and transmitted through the established path with the SIP server 100.

Subsequently, the SIP server 100 receiving the invite message extracts the telephone number (016-220-2100 in the example of Table 2) from the destination wireless mobile terminal 20 from the invite message. Requests location information of the called-party wireless mobile terminal 20 at 200. Then, the location registration server 200 obtains the location information of the terminal having the telephone number of 016-220-2100 with reference to the database managed by itself and transmits it to the SIP server 100 (S102).

Next, the SIP server 100 finds the location of the destination wireless mobile terminal 20 from the location registration server 200 and forwards the invite message to the destination wireless mobile terminal 20 ( S104). At this time, the SIP server / PDSN (100) generates a "100 Trying" message, which is a kind of 1xx (Informational) in response to the invite message, and sends it to the calling party's wireless mobile terminal (10) (S103). . In addition, the "100 Trying" message may be transmitted to the originating wireless mobile terminal together with the "180 Ringing" message, and these messages (100 Trying, 180 Ringing) may be set as an option.

Subsequently, the destination wireless mobile terminal 20 having received the INVITE message decodes the 'c' field of the session information description unit and the 'm' field of the media description unit of the invite message, and the IP address is' 100.101. 102.103 'confirms that it is a request for establishing a peer-to-peer TCP / IP session from the calling-end wireless mobile terminal 10, and determines whether to accept the call. At this time, the called party's wireless mobile terminal 20 receives an INVITE message generated by the calling party's wireless mobile terminal 10 in the form of a data burst message. When the called party's wireless mobile terminal 20 accepts a call requested by the calling party's wireless mobile terminal 10, it establishes a PPP connection with the PDSN 100 and receives an IP address from the PDSN 100, In response to the message, it generates a "200 OK" message, which is a kind of 2xx (Success), and transmits the message to the SIP server 100 (S105). Thereafter, the SIP server 100 forwards the "200 OK" message to the calling-party wireless mobile terminal 10 (S106). Here, the "200 OK" message includes the IP address of the called party's wireless mobile terminal 20 that generated the message.

Thereafter, the calling party wireless mobile terminal 10 generates an "ACK" message in response to the "200 OK" message of the called party wireless mobile terminal 20 and transmits the message to the SIP server 100 (S107). Then, the SIP server 100 receives the forwarding to the destination wireless mobile terminal 20 (S108).

Upon receiving the SIP " ACK " message, the called party's wireless mobile terminal 20 receives the 'c' field of the session information description portion of the invite message (i.e. IN IP4 100.101.102.103 in the example of Table 2 above). Using the IP address (ie, 100.101.102.103 in the example of Table 2) extracted from the caller's wireless mobile terminal 10 extracted from the " scene " for TCP / IP connection to the caller's wireless mobile terminal 10. SYN) " " packet to transmit the TCP / IP connection procedure (S109).

Subsequently, the originating wireless mobile terminal 10 transmits a "SYN ACK" packet to the called wireless mobile terminal 20 in response to the "thin (SYN)" packet (S110). The mobile terminal 20 transmits the " ACK " packet to the calling wireless mobile terminal 10 in response to the " thin ACK " packet (S111). 20) TCP / IP session is established. In this case, the TCP / IP connection process is a three-way handshaking scheme for a typical TCP / IP connection consisting of transmission of "SYN", "SYN ACK", and "ACK" packets. Used.

As described above, according to the first exemplary embodiment of the present invention, the called-party wireless mobile terminal 20 receives information from the calling-party wireless mobile terminal 10 based on the information included in the 'm' field of the media description information in the invite message. Recognizing that a peer-to-peer type TCP / IP session is requested, and using the IP address of the originating radio mobile terminal 10 described in the 'c' field of the session information description portion of the invite message, the originating radio mobile terminal 10 and TCP / IP session connection process, and the TCP / IP session established through this process provides the user with a foundation for peer-to-peer chat service.

In the present invention, the wireless mobile terminal 10 is not limited to the TCP / IP session establishment between the wireless mobile terminals 20 using the extended SIP, and the wireless mobile terminal 10 described above with the fixed terminal connected to the Internet. The TCP / IP session can be established through a process similar to the TCP / IP setup process.

Hereinafter, a method of establishing a TCP / IP session to provide a peer-to-peer service between a wireless mobile terminal and a fixed host connected to the Internet will be described.

3 is a diagram illustrating a network structure for establishing a TCP / IP session using an extended SIP for a peer-to-peer service between a wireless mobile terminal and a fixed terminal of the Internet according to the present invention. A process of requesting a call for a TCP / IP session establishment from a fixed terminal 30 on the Internet is shown.

First, the originating wireless terminal 10 establishes a PPP connection with the PDSN 100 for communication with the fixed terminal 30 and receives an IP address from the PDSN 100, and then receives the fixed terminal 30 from the destination terminal. By generating an invite message to the SIP server 100 (S301). In the invite message, the IP address of the originating wireless mobile terminal 10 is described in the 'c' field of the session information description part of the message body, and the 'm' field of the media description part is described, for example, in [Table 2]. The TCP port number of the application and the media name of the request call are described, such as 'application 49170 TCP chatting'.

Thereafter, the SIP server 100 forwards the invite message to the fixed terminal 30 (S302), and sends a "100 Trying" message to the calling party's wireless mobile terminal 10 in response to the invite message (S303). ). At this time, the "100 Trying" message can be set as an option.

Here, the invite message generated by the calling party's wireless mobile terminal 10 has the same structure as the invite message described in Table 2 above. However, the identification number of the fixed terminal 30 connected to the Internet may follow a SIP Uniform Resource Locator (URL) or an E.164 type numbering system supported by SIP.

However, the embodiment of FIG. 3 will be described only in the case of following the E.164 type numbering system as in the case of TCP / IP session establishment between the wireless mobile terminals 10 and 20 described with reference to FIG. In the case where the called party's fixed terminal 30 is called according to the E.164 type numbering system, the location information of the called wireless mobile terminal 20 is acquired in the process of establishing a TCP / IP session between the wireless mobile terminals 10 and 20. The step of doing so may be omitted.

The called party fixed terminal 30 receiving the INVITE message receives a message from the calling party's mobile terminal 10 having the IP address described in the field 'c' of the session information description part of the invite message. As described in the field m ', it confirms that the request is for establishing a peer-to-peer TCP / IP session and determines whether to accept the call. At this time, when the called party's fixed terminal 30 accepts the call setup request from the calling party's wireless mobile terminal 10, it generates a "200 OK" message as a response message and transmits it to the SIP server 100 (S304). In step S305, the SIP server 100 forwards the message "200 OK" to the originating wireless mobile terminal 10. Here, the '200 OK' message includes the IP of the called party's fixed terminal 30.

Thereafter, the calling party wireless mobile terminal 10 generates an "ACK" message in response to the "200 OK" message and transmits it to the SIP server 100 (S306), and the SIP server 100 receives the call. Forward to the side fixed terminal 30 (S307).

Next, the called party fixed terminal 30 is the IP address of the called party wireless mobile terminal 10 included in the invite message generated by the calling party wireless mobile terminal 10 and transmitted through the SIP server / PDSN 100. The TCP / IP connection process is performed by transmitting a "SYN" packet for the TCP / IP connection to the calling party's wireless mobile terminal 10 by using S308. At this time, in the TCP / IP connection process, a three-way handshaking method is used as described with reference to FIG. 1.

4 is a diagram illustrating a network structure for establishing a TCP / IP session using an extended SIP for peer-to-peer service between a fixed terminal and a wireless mobile terminal of the Internet according to the present invention, wherein the fixed terminal 30 is a wireless mobile communication network. The process of requesting a call for establishing a TCP / IP session to the called-party wireless mobile terminal 10 in FIG.

First, the calling party fixed terminal 30 generates the invite message using the wireless mobile terminal 10 as the called terminal and transmits it to the SIP server 100 (S401). Subsequently, the SIP server 100 sends a "100 Trying" message to the calling station fixed terminal 30 in response to the invite message (S402), and the called party wireless mobile terminal 10 to the location registration server 200. The location information of the called wireless terminal 10 is determined by requesting the location information of the called party (S403), and then an INVITE message is forwarded in the form of a data burst message to the called wireless terminal 10. (S404). At this time, the "100 Trying" message can be set as an option.

Here, the invite message generated by the calling party fixed terminal 30 has the same structure as the invite message described in [Table 2] above, and the calling party fixed terminal (" c " 30) is described, and the TCP port number of the application and the media name of the request call are described in the 'm' field of the media description unit, for example, 'application 49170 TCP chatting' in [Table 2]. In addition, the identification number of the fixed terminal 30 connected to the Internet may follow a SIP URL or an E.164 type number system supported by the SIP. However, in the embodiment of FIG. The following description will be given only in the case of following the E.164 numbering system as in the case of establishing a TCP / IP session between the wireless mobile terminals 10 and 20.

The recipient wireless terminal 10 receiving the INVITE message receives a message from the media description unit from the calling station fixed terminal 30 having the IP address described in the field 'c' of the session information description portion of the invite message. As described in the field m ', it confirms that the request is for establishing a peer-to-peer TCP / IP session and determines whether to accept the call. At this time, when the called party's wireless mobile terminal 10 accepts a call setup request from the calling station's fixed terminal 30, it establishes a PPP connection with the PDSN 100 and receives an IP address from the PDSN 100. When a "200 OK" message is generated and transmitted to the SIP server 100 in response to the invite message (S405), the SIP server 100 forwards the "200 OK" message to the calling station's fixed terminal 30. (S406). Here, the '200 OK' message includes the IP address of the called party's wireless mobile terminal 10.

Thereafter, the calling party fixed terminal 30 generates an "ACK" message in response to the "200 OK" message and transmits it to the SIP server 100 (S407), and the SIP server 100 receives the called party. Forward to the wireless mobile terminal 10 (S408).

Next, the called party's wireless mobile terminal 10 uses the IP address of the fixed terminal 30 included in the invite message generated by the calling party's fixed terminal 30 and transmitted through the SIP server 100. The TCP / IP connection process is performed by transmitting a "thin" packet for the TCP / IP connection to the side fixed terminal 30 (S409). At this time, the three-way handshaking method is used in the TCP / IP connection process as described in FIG.

FIG. 5 is a diagram illustrating a network structure for establishing a TCP / IP session through an out dialing function between wireless mobile terminals using an extended SIP according to the present invention. Referring to FIG. 5, the network for establishing a TCP / IP session through the out dialing function between the wireless mobile terminals 10 and 20 has a structure in which the network server 300 is further included in the network structure described with reference to FIG. 1. .

The network server 300 is a called-side wireless mobile terminal 20 to which the calling-party wireless mobile terminal 10 connected (log-on) is not connected (log-off). And a server for checking the connection to the destination wireless mobile terminal 20 through an out-dialing function when communication for establishing a TCP / IP session is desired. The network server 300 is more preferably a server that connects to the wireless mobile terminals 10 and 20 to provide an online game or chat service, but is not limited thereto.

Here, the out-dialing function refers to a call with the called party wireless mobile terminal 20 using the extended SIP instead of the calling party wireless mobile terminal 10 in response to a call setup request from the calling wireless mobile terminal 10. It means to perform the setting process. The other SIP server / PDSN 100, the location registration server 200, and the plurality of wireless mobile terminals 10, 20 perform functions similar to those described in FIG.

When describing a process for establishing a TCP / IP session through the out-dialing function, first, the originating wireless mobile terminal 10 establishes a TCP / IP session with the network server 300 and based on the established TCP / IP session. In step S501, the SIP server 100 forwards the access request message to the called-side wireless mobile terminal 20 to the network server 300 (S502). In this case, it is preferable that the connection request message includes the telephone number of the called party's wireless mobile terminal 20. Accordingly, the network server 300 generates an INVITE message that attempts a connection request to the called-party wireless mobile terminal 20 and transmits it to the SIP server 100 (S503). Here, the invite message has the same structure as the invite message described in [Table 2] above, the IP address of the network server 300 is described in the 'c' field of the session information description portion of the message body, and the media description portion In the 'm' field, for example, the TCP port number of the application and the media name of the request call are described, such as 'application 49170 TCP chatting' in [Table 2].

Then, the SIP server 100 receiving the invite message sends a "100 Trying" message to the network server 300 (S504), the location registration server 200 to determine the location of the destination wireless mobile terminal 20 After determining the location of the called-party wireless mobile terminal 20 by connecting to the receiver (S505), the INVITE message is forwarded to the called-party wireless mobile terminal 20 in the form of a data burst message ( S506). At this time, the "100 Trying" message can be set as an option.

The destination wireless mobile terminal 20 decodes the 'c' field of the session information technology section and the 'm' field of the media description section of the invite message and peers from the network server 300 having the IP address described in the 'c' field. When confirming that there is a request for setting up a two-peer type TCP / IP session and accepting the connection with the network server 300, the called-party wireless mobile terminal 20 establishes a PPP connection with the PDSN 100 and then establishes a PDSN ( IP address from 100) generates a "200 OK" message in response to the invite message and transmits it to the SIP server 100 (S507), the SIP server 100 forwards it to the network server 300. (S508). Here, the "200 OK" message includes the IP address of the called party's wireless mobile terminal 20.

Next, the network server 300 generates an "ACK" message in response to the "200 OK" message and transmits it to the SIP server 100 (S509), and the SIP server 100 transmits the message to the called party wirelessly. Forward to the mobile terminal 20 (S510).

Subsequently, the called-party wireless mobile terminal 20 that receives the "ACK" message uses the IP address of the network server 300 included in the invite message transmitted by the network server 300 to display the network server 300. ) Transmits a "SYN" packet for the TCP / IP connection and proceeds with the TCP / IP connection (S511).

Here, the invite message transmitted by the network server 300 to the called-party wireless mobile terminal 20 is similar to the invite message structure described in Table 2 above. The TCP port number of the network server 300 is preferably added to the 'm' field of the invite message. In the TCP / IP connection process, a three-way handshaking method is used as described with reference to FIG. 1.

Therefore, when the TCP / IP session is established between the called party wireless mobile terminal 20 and the network server 300 through the above-described process, the calling party wireless terminal 10 transmits the called party wireless through the network server 300. Based on the TCP / IP session with the mobile terminal 20, it is possible to receive services of online chat and online games. In other words, even if the called-party wireless mobile terminal 20 is not connected to the network server 300, the calling-side wireless mobile terminal 10 can communicate through the out dialing function of the network server 300. .

Meanwhile, the called party's wireless mobile terminal 20 may establish a TCP / IP session with the calling party's wireless mobile terminal 10 in a direct peer-to-peer manner. This will be described in more detail as follows.

6 is a diagram illustrating a network structure for establishing a TCP / IP session through an out-dialing function using an extended SIP for a peer-to-peer service between wireless mobile terminals according to the present invention.

Referring to FIG. 6, steps S601 to S610 in which the called-party wireless mobile terminal 20 establishes a TCP / IP session with the calling-party wireless mobile terminal 10 in a direct peer-to-peer manner are described in steps S501 to S610 described above with reference to FIG. 5. Same as S510.

Through the above process, a TCP / IP session is established between the calling party wireless mobile terminal 10 and the network server 300 and between the network server 300 and the called party wireless mobile terminal 20. Therefore, the calling party wireless mobile terminal 10 may communicate with the called party wireless mobile terminal 20 based on the TCP / IP session via the network server 300.

At this time, when the user of the calling party wireless mobile terminal 10 wants to communicate with the user of the called party wireless mobile terminal 20 in a peer-to-peer manner, the network server through an application running on the wireless mobile terminal 10. The peer 300 requests a peer-to-peer communication. This is similar to the process of converting to a one-to-one chat method according to a user's needs while receiving a chat service through a chat server on a wired Internet.

The network server 300 transmits an IP address and a port number of the called-party wireless mobile terminal 20 obtained in the TCP / IP session establishment process with the called-party wireless mobile terminal 10 to the calling-party wireless mobile terminal 10. And transmits to the side wireless mobile terminal (10). The IP address and port number of the called party's wireless mobile terminal 20 transmitted through the TCP / IP session established between the network server 300 and the calling party's wireless mobile terminal 10 are driven by the calling party's wireless mobile terminal 10. It is desirable for the application to be handled.

The originating wireless mobile terminal 10 transmits a "SYN" packet of TCP / IP to the IP address and pod number of the terminating wireless mobile terminal 20 to establish a TCP / IP session with the terminating wireless mobile terminal 20. Proceed with the connection procedure. The TCP / IP session connection procedure uses the three-way handshaking method described above.

When a TCP / IP session is established between the calling / called party wireless mobile terminals 10 and 20 according to the above procedure, the called party wireless mobile terminal 20 preferably releases the TCP / IP session connected to the network server 300. Do.

Therefore, the calling party's wireless mobile terminal 10 directly connects to the called party's wireless mobile terminal 20 which is not connected to the network server 300 by using the out dialing function provided by the network server 300. When a TCP / IP session is established between the wireless mobile terminals 10 and 20, the user can enjoy a chat or a game based on a peer-to-peer TCP / IP session.

In the method for establishing a TCP / IP session through the extended SIP described above, the SIP message is processed in a 3-way handshaking method, and in addition, the TCP is configured in a 3-way handshaking method. Try a / IP connection to establish a TCP / IP session. Here, the "3-way handshaking" of the SIP message means 'INVITE' message, '200 OK' message, and 'ACK' message in order to transmit TCP / IP session setup information. This means that the SIP message is transmitted. In addition, "3-way handshaking" for a TCP / IP connection between terminals is a packet transmission in the order of 'SYN' packet, 'SYN ACK' packet, and 'ACK packet'. This means that it is done. However, given that radio resources are limited, the three-way handshaking process of the SIP message or the three-way handshaking for TCP / IP connection may cause overload.

Accordingly, as another embodiment of the present invention, a method of establishing a TCP / IP session by performing a one-way handshaking of a SIP message using extended SIP and performing a three-way handshaking in a TCP / IP connection process And a method of establishing a TCP / IP session by handshaking a SIP message in a two-way manner and in a TCP / IP connection in a one-way manner. Here, the 1-way method of the SIP message and the 2-way method of the SIP message send TCP / IP session setup information to the SIP message together and do not use the 3-way handshaking method for the SIP message. This is how TCP / IP sessions are established.

7 is a one-way handshaking for SIP messages using extended SIP for peer-to-peer service between wireless mobile terminals according to the present invention, and three-way handshaking in a TCP / IP connection process. This is a network structure diagram for establishing a TCP / IP session.

Referring to FIG. 7, first, the calling party's wireless mobile terminal 10 establishes a PPP connection with the PDSN 100 for communication and receives an IP address from the PDSN 100, and then destinations the called party's wireless mobile terminal 20. By generating an invite message (INVITE) to the SIP server 100 transmits the invite message (S701).

Subsequently, the SIP server 100 sends a "100 Trying" message to the calling wireless mobile terminal 10 in response to the invite message (S703), and transmits the location of the called wireless mobile terminal 20 to the location registration server ( In operation S702, an INVITE message is forwarded to the destination wireless mobile terminal 20 in the form of a data burst message in operation S704. At this time, the "100 Trying" message can be set as an option.

The invite message has the same structure as in [Table 2] above, and further includes information for allowing the called party wireless mobile terminal 20 to directly establish a TCP / IP session with the calling party wireless mobile terminal 10. It is preferable. According to the present embodiment, the TCP / IP session setting information added to the invite message shown in [Table 2] may be configured as shown in [Table 3] below.

division field Contents Message body Media Technology Department m application 49170 TCP chatting a tcpinfo: initialize-sequence 123 a tcpinfo: urgent-point 0 a tcpinfo: window-size 16 In the above [Table 3], the information of the field 'm' is received by the TCP port number of the application running in the originating wireless mobile terminal 10 and the originating wireless mobile terminal 10 as described in [Table 2]. Media name of the call requested to the side wireless mobile terminal 20 is shown.

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In addition, field 'a' is a field describing zero or one or more media characteristics. In Table 3, information for TCP / IP session establishment is described. Describes the sequence (initialize-sequence), agent-point and window-size.

The additional information shown in [Table 3] illustrates additional information for establishing a direct TCP / IP session between the wireless mobile terminals 10 and 20, and is not limited to the above example. It will be apparent to those skilled in the art that the present invention may be provided in various ways.

At this time, the called party's wireless mobile terminal 20 decodes the 'c' field of the session information description unit and the 'm' field of the media description unit of the invite message, and has an IP address described in the 'c' field. When the terminal 10 confirms that there is a request for establishing a peer-to-peer TCP / IP session, and accepts the connection with the originating wireless mobile terminal 10, the called-party wireless mobile terminal 20 receives the PDSN (100). PPP configuration, and after receiving an IP address from PDSN 100, transmits a "thin (SYN)" packet for TCP / IP connection to originating wireless mobile terminal (10). Connection) process (S707). At this time, in the TCP / IP connection process (S708), a three-way handshaking method is used as described with reference to FIG.

Therefore, when the called party's wireless mobile terminal 20 accepts a call for the invite message generated by the calling party's wireless mobile terminal 10, it transmits one SIP message (1-byte handshaking). TCP / IP connection process is performed by this, and by using the extended SIP, TCP / IP between wireless mobile terminals 10 and 20 is changed by only changing the transmission of SIP messages to 1-way without changing the existing TCP / IP connection scheme. By enabling IP session setup, you can reduce the load on the network by reducing the number of SIP messages sent.

If the called party's wireless mobile terminal 20 fails to accept the call, it generates a "Reject" message and transmits it to the SIP server 100 (S705), and the SIP server 100 sends it to the calling party. Forward to the wireless mobile terminal 10 (S706).

As described above, the application of the wireless mobile terminal 10 or 20 operating based on the established TCP / IP session may be a program for transmitting and processing not only voice but also multimedia data such as a game and a chat.

8 is a diagram illustrating a network structure for establishing a TCP / IP session in a 2-way manner by using an extended SIP for a peer-to-peer service between wireless mobile terminals according to the present invention. Referring to FIG. 8, the calling party's wireless mobile terminal 10 establishes a connection with the PDSN 100 and receives an IP address from the PDSN 100 for communication, and then uses the called party's wireless mobile terminal 20 as a destination. The invite message is generated and the invite message is transmitted to the SIP server 100 (S801).

Subsequently, the SIP server 100 checks the location of the called party's wireless mobile terminal 20 through the location registration server 200 (S802), and generates a "100 Trying" message in response to the invite message and sends the message to the calling party. It transmits to the wireless mobile terminal 10 (S803). In addition, the SIP server 100 forwards the INVITE message to the destination wireless mobile terminal 20 in the form of a data burst message by using the location information of the destination wireless mobile terminal 20 ( S804). At this time, the "100 Trying" message can be set as an option. Here, the invite message may be configured as described with reference to FIG. 7.

At this time, the called-party wireless terminal 20 decodes the 'c' field of the session information description section, the 'm' field and the 'a' field of the media description section of the invite message and has an IP address described in the 'c' field. When confirming that there is a request for establishing a peer-to-peer type TCP / IP session from the calling party's mobile terminal 10 and accepting a call, the called party's mobile terminal 20 establishes a PPP configuration with the PDSN 100. After receiving the IP address from the PDSN 100, an extended SIP message (ie, a "200 OK" message) carrying TCP / IP information is generated and transmitted to the SIP server 100 (S805). Thereafter, the SIP server 100 forwards it to the calling party's wireless mobile terminal 10 (S806). If the called party's wireless mobile terminal 20 does not accept the call, it generates a "Reject" message and transmits it to the SIP server 100, and the SIP server / PDSN 100 transmits it to the calling party radio. Forward to mobile terminal 10.

The "200 OK" message may be configured as shown in Table 4 below.

division field Contents Start line SIP / 2.0 200 OK Message header Via SIP / 2.0 / UDP proxy.sktelecom.com:5060 Via SIP / 2.0 / UDP 100.101.102.103 To sip: 82162202100@ktf.co.kr; user = phone From sip: 82114104500@sktelecom.com; user = phone Call-id 10@100.101.102.103 Cseq 1 INVITE Subject This is TCP connection. Contact sip: 82162202100@ktf.co.kr Content-Type application / sdp Content-length ... Message body v 0 o 82162202100 2890844526 2890844526 IN IP4 200.201.202.203 s TCP connection c IN IP4 200.201.202.203 t 0 0 m application 32170 TCP chatting a tcpinfor: initialize-sequence 164 a tcpinfor: urgent-point 0 a tcpinfor: window-size 16 The called party's wireless mobile terminal 20 receives information for establishing a TCP / IP session in an invite message generated by the calling party's wireless mobile terminal 10 received through the SIP server 100 (ie, FIG. 7). Information using the above-described information), and the calling-party wireless mobile terminal 20 uses the information for establishing a TCP / IP session in the "200 OK" message generated by the called-party wireless mobile terminal 20 (that is, [Table 4]. ], The IP address of the called party's wireless mobile terminal 20 described in the 'c' field of the message body, the TCP port number '32170' in the 'm' field, and the initialization sequence number '123' in the 'a' field. The agent point '0' and window size '16') are used to establish a TCP / IP session.

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Since the wireless mobile terminals 10 and 20 have all the information for establishing the TCP / IP session, one signal for requesting the TCP / IP session establishment of the calling terminal 10, for example, the "acknowledgement of TCP / IP" (ACK) " packet is transmitted to the destination wireless mobile terminal 20 to establish a TCP / IP session between the wireless mobile terminals 10 and 20 (S807).

In this way, TCP / IP session establishment information between the wireless mobile terminals 10 and 20 can be sent together in an extended SIP message (ie, an invite message and an ok message), without performing 3-way handshaking for the TCP / IP connection. Only one-way handshaking is available to establish a TCP / IP session. Therefore, in case of using the 2-way method of the extended SIP message according to the present invention, the extended SIP message is transmitted in the 2-way method, and the TCP / IP connection process is performed in the 1-way method, so that the link is compared with the conventional method. The delay is reduced and the TCP / IP connection setup time is reduced. The method of the present invention as described above is implemented as a program, and can be recorded in a computer-readable form on a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical). Disk, etc.). Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention as described above, in the mobile communication system to provide a wireless data service, such as CDMA 2000 system, W-CDMA by establishing a TCP / IP session based on the extended SIP to provide a peer-to-peer application application service base between terminals Reliable data transfer is possible.

In addition, the present invention has the effect that it is possible to communicate with the user desired by connecting to the network server by requesting a connection to the network server and other users who are not online through the network server's out-dialing function.

 In addition, the present invention loads the information for TCP / IP session establishment in the extended SIP message together to establish a TCP / IP session in a two-way or one-way manner without 3-way handshaking, thereby overloading the network This can reduce the number of packets and quickly establish a TCP / IP connection.

1 is a network structure diagram for establishing a TCP / IP session using an extended SIP for a peer-to-peer service between wireless mobile terminals according to the present invention. ,

2 is an explanatory diagram showing an extended SIP stack according to the present invention;

3 is a network structure diagram for establishing a TCP / IP session using an extended SIP for a peer-to-peer service between a wireless mobile terminal and a fixed host of the Internet according to the present invention;

4 is a network structure diagram for establishing a TCP / IP session using an extended SIP for peer-to-peer service between a fixed terminal and a wireless mobile terminal of the Internet according to the present invention;

5 is a network structure diagram for establishing a TCP / IP session through an out-dialing function between wireless mobile terminals using an extended SIP according to the present invention;

6 is a network structure diagram for establishing a TCP / IP session through an out-dialing function using an extended SIP for a peer-to-peer service between wireless mobile terminals according to the present invention;

7 is a diagram illustrating a network structure for establishing a TCP / IP session in a one-way manner using an extended SIP for peer-to-peer service between wireless mobile terminals according to the present invention;

8 is a diagram illustrating a network structure for establishing a TCP / IP session in a 2-way manner using an extended SIP for a peer-to-peer service between wireless mobile terminals according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10,20: wireless mobile terminal 30: fixed terminal

100: SIP server / PDSN 200: Location registration server

300: network server

Claims (13)

In the method for establishing a TCP / IP session using a SIP in a communication system, An originating wireless mobile terminal attempting to originate using an extended SIP receives an IP address from an IP address assignment means, the assigned IP address, an identification number of the called wireless terminal, and the originating call. When generating an INVITE message including a TCP port number of an application running in the wireless mobile terminal and information indicating that a TCP / IP session is required, the SIP server is transmitted to the SIP server. Acquiring, by the terminal location registration means, the location information of the called party wireless mobile terminal based on the identification number of the called party wireless mobile terminal; And The SIP server transmits the invite message to the called party's wireless mobile terminal based on the location information of the called party's wireless mobile terminal. The destination wireless mobile terminal is assigned an IP address from the IP address assignment means, generates an OK message in response to the invite message, and transmits the message to the calling party wireless mobile terminal through the SIP server. , The originating wireless mobile terminal receiving the OK message generates an ACK message and transmits it to the called wireless mobile terminal through the SIP server. The called-party wireless mobile terminal uses the IP address and TCP port number of the calling-party wireless mobile terminal included in the invite message, and information indicating that a TPC / IP session is required. Steps to proceed to 3-way handshaking process for establishing peer-to-peer TPC / IP session Method of establishing a TCP / IP session using an extended SIP for a peer-to-peer service of a communication terminal period comprising a. In the method for establishing a TCP / IP session using a SIP in a communication system, An originating wireless mobile terminal attempting to make a call using an extended SIP receives an IP address from an IP address assignment means, and assigns the allocated IP address to the called stationary terminal connected to the wired communication network. Generate and transmit an INVITE message including an identification number, a TCP port number of an application running in the calling wireless mobile terminal, and information indicating that a TCP / IP session is required to be sent to the SIP server. The SIP server transmits the invite message to the called stationary terminal based on the identification number of the called stationary terminal. The called party fixed terminal generates an OK message in response to the invite message, and transmits it to the calling party wireless mobile terminal through the SIP server. The originating wireless mobile terminal receiving the OK message generates an ACK message and transmits it to the called party's fixed terminal through the SIP server. The called party's fixed terminal peers with the calling party's wireless mobile terminal by using the IP address and TCP port number of the calling party's wireless mobile terminal included in the invite message, and information indicating that a TCP / IP session is required. TPC / IP session using extended SIP for peer-to-peer service of communication terminal period, characterized by proceeding to 3-way handshaking connection process for establishing two-peer TPC / IP session How to set up. In the method for establishing a TCP / IP session using a SIP in a communication system, The fixed terminal connected to the wired network is required to set its own IP address, the identification number of the called wireless mobile terminal, the TCP port number of the application running on the calling terminal, and the TCP / IP session setup. When an INVITE message including information indicating the information is generated and transmitted to the SIP server, the SIP server inquires to the terminal location registration means based on the identification number of the called-party wireless mobile terminal, Obtaining location information; And The SIP server transmits the invite message to the called party's wireless mobile terminal based on the location information of the called party's wireless mobile terminal. The destination wireless mobile terminal is assigned an IP address from an IP address assignment means, generates an OK message in response to the invite message, and transmits the message to the calling party's fixed terminal through the SIP server. The originating stationary terminal receiving the OK message generates an ACK message and transmits it to the called party's wireless mobile terminal through the SIP server. The called party's wireless terminal peers with the calling station's fixed terminal by using the IP address and TCP port number of the calling station's fixed terminal included in the invite message, and information indicating that a TPC / IP session is required. Steps to proceed to 3-way handshaking connection for establishing peer-to-peer IP / IP session Method of establishing a TCP / IP session using an extended SIP for a peer-to-peer service of a communication terminal period comprising a. In the method for establishing a TCP / IP session using a SIP in a communication system, When the calling wireless mobile terminal communicating with the network server transmits the access request information including the identification number of the called wireless mobile terminal which is not connected to the network server through the SIP server, the network server transmits the request through the SIP server. Obtaining location information of the called party's wireless mobile terminal by querying the terminal location registration unit based on the identification number of the called party's wireless mobile terminal; The network server generates an invite message including an identification number of the called-party wireless mobile terminal, a TCP port number of an application, and information indicating that a TPC / IP session is required, and converts the invite message into the location information. Transmitting to the called wireless mobile terminal through the SIP server by using; And When the called-party wireless mobile terminal is assigned an IP address from an IP address assignment means, generates an OK message in response to the invite message, and transmits the message to the network server through the SIP server, the OK message is transmitted. The network server receiving the message generates an ACK message and transmits the ACK message to the called wireless mobile terminal through the SIP server. The called-party wireless mobile terminal establishes a peer-to-peer type TPC / IP session with one of the network server and the originating terminal by using the TCP port number and information indicating that a TPC / IP session is required. Steps to proceed with 3-way handshaking connection to set up Method of establishing a TCP / IP session using an extended SIP for a peer-to-peer service of a communication terminal period comprising a. The method of claim 4, wherein The network server, Method for establishing a TCP / IP session using an extended SIP for a peer-to-peer service of a communication terminal period, characterized in that any one of a chat service providing server and a game service providing server. The method of claim 4, wherein The TCP port number is, Method of establishing a TCP / IP session using extended SIP for peer-to-peer service of a communication terminal period, characterized in that the TCP port number of the application running on any one of the source mobile terminal and the network server. In the method for establishing a TCP / IP session using a SIP in a communication system, An originating wireless mobile terminal attempting to originate using an extended SIP receives an IP address from an IP address assignment means, the assigned IP address, an identification number of the called wireless mobile terminal, and the originating wireless movement. When an INVITE message including a TCP port number and TCP / IP session setup information of an application running on the terminal is generated and transmitted to the SIP server, the SIP server transmits to the called party's wireless mobile terminal. Obtaining location information of the called-party wireless mobile terminal by querying the terminal location registration means based on the identification number of the receiver; And The SIP server transmits the invite message to the called party's wireless mobile terminal based on the location information of the called party's wireless mobile terminal. The called party's wireless mobile terminal is assigned an IP address from the IP address assignment means and uses the IP address, TCP port number, and TCP / IP session setup information of the calling wireless mobile terminal included in the invite message. And proceeding to a three-way handshaking connection process for establishing a peer-to-peer TPC / IP session with the calling-party wireless mobile terminal. Method of establishing a TCP / IP session using an extended SIP for a peer-to-peer service of a communication terminal period comprising a. The method of claim 7, wherein The TPC / IP session setting information, And a TCP port number (Transport Address), information indicating that a TPC / IP session is required, an Initialize Sequence, an Urgent Point, and a Window Size. A method of establishing a TPC / IP session using an extended SIP for a peer-to-peer service of a communication terminal. In the method for establishing a TCP / IP session using a SIP in a communication system, An originating wireless mobile terminal attempting to originate using an extended SIP receives an IP address from an IP address assignment means, the assigned IP address, an identification number of the called wireless mobile terminal, and the originating wireless movement. When an INVITE message including a TCP port number and TCP / IP session setup information of an application running on the terminal is generated and transmitted to the SIP server, the SIP server transmits to the called party's wireless mobile terminal. Obtaining location information of the called-party wireless mobile terminal by querying the terminal location registration means based on the identification number of the receiver; And The SIP server transmits the invite message to the called party's wireless mobile terminal based on the location information of the called party's wireless mobile terminal. The called party wireless mobile terminal is assigned an IP address from the IP address assignment means, and in response to the invite message, the assigned own IP address, the identification number of the calling party wireless mobile terminal, and the called party wireless. Generate an OK message including a TCP port number and TCP / IP session setup information of an application running in the mobile terminal and transmit the message to the calling wireless terminal through the SIP server; The calling party's wireless terminal peers with the called party's wireless mobile terminal by using the IP address, TCP port number, and TPC / IP session setting information of the called party's wireless mobile terminal included in the OK message. Steps to proceed to 1-way handshaking connection process for establishing peer-type TPC / IP session Method of establishing a TCP / IP session using an extended SIP for a peer-to-peer service of a communication terminal period comprising a. The method of claim 9, TPC / IP session setting information included in the invite message and the OK message, And a TCP port number (Transport Address), information indicating that a TPC / IP session is required, an Initialize Sequence, an Urgent Point, and a Window Size. A method of establishing a TPC / IP session using an extended SIP for a peer-to-peer service of a communication terminal. The method of claim 9, In the connection process, The peer-to-peer service of the communication terminal period is characterized in that a TPC / IP session is established by transferring information for TPC / IP connection from the calling wireless terminal to the called-party wireless terminal once. How to set up TPC / IP session using extended SIP for PC. The method according to any one of claims 1 to 11, The wireless mobile terminal, A method of establishing a TPC / IP session using an extended SIP for a peer-to-peer service of a communication terminal, wherein the extended SIP protocol function and a TCP / IP protocol function are embedded. The method according to any one of claims 1 to 11, The extended SIP (SIP), A TPC / IP session using an extended SIP for a peer-to-peer service of a communication terminal period, wherein information for establishing a TPC / IP session between wireless mobile terminals is recorded in a media description information field of an SIP message. How to set up.