KR101397633B1

KR101397633B1 - System and method for providing instatnt message service in ims

Info

Publication number: KR101397633B1
Application number: KR1020070125249A
Authority: KR
Inventors: 강경모; 이현숙
Original assignee: 주식회사 케이티
Priority date: 2007-12-05
Filing date: 2007-12-05
Publication date: 2014-05-22
Also published as: KR20090058610A

Abstract

More particularly, the present invention relates to an IM chat session management method and an MSRP resource allocation method using an IM server and an MSRP server, And more particularly, to a method and system for providing an IMS-based IM service that can prevent a session connection failure due to an IMS-based IM service.

The instant messaging (IM) service providing system based on the Internet Protocol Multimedia Subsystem (IMS) of the present invention manages an IM chat message between user terminals accessing the portable Internet and an IM chat session for file transmission And an MSRP server for delivering contents of an IM conversation message between the IM server and the user terminal and a content of a message session relay protocol (MSRP) session resource allocation and an IM conversation message for file transmission, the MSRP server comprising: Performs MSRP resource allocation for the originating user terminal, and based on the MSRP resource allocation result, the IM server establishes an IM conversation session.

Mobile Internet, IMS, IM server, MSRP server, CSCF, HSS, SIP, SDP

Description

TECHNICAL FIELD [0001] The present invention relates to a system and a method for providing an IM-based instant message service,

The present invention relates to an IM (Instant Message) service providing method and system based on an IMS (IP Multimedia Core Network Subsystem), and more particularly, to an IM chat session management method using an Instant Message (IM) server and a Message Session Relay Protocol And an MSRP resource allocation method to prevent an unsuccessful session connection due to a shortage of resources in a user terminal.

In Europe-led 3GPP and 3GPP2 led by IMT-2000, ALL-IP network that replaces the infrastructure of mobile communication network with IP is presented.

The ALL-IP network is proposed to satisfy various service demands of the increasing Internet users with the wireless access service. The ALL-IP network uses the IP structure and protocol of the mobile communication network to transmit data and signaling on the basis of IP, bearer, control and service functions, and provides multimedia communication in real time.

Using the IP, the ALL-IP network can provide services in cooperation with the Internet network regardless of the access methods of the existing wired telephone, mobile phone, cable, LAN, etc., and provides synergy effect and service by expanding IP The cost reduction effect can be obtained.

In addition, the ALL-IP network provides a solution suitable for integrated services, which is a comprehensive multimedia service that simultaneously includes voice, data, and real-time video services. It is integrated with IP, is easy to operate and maintain, A cost saving effect can be obtained.

That is, the ALL-IP network is an IP-based integrated network for supporting wired / wireless voice service, wired / wireless Internet service, and wired / wireless multimedia service.

IMS (IP Multimedia Core Network Subsystem) is defined to provide various services to subscribers based on the ALL-IP network.

Korean Patent Laid-Open No. 10-2004-0104150 discloses a method for overcoming the resources of wireless terminals in sharing contents among peers using a wireless Internet and a wired Internet on various Internet including a mobile communication system or a WLAN Discloses a 'wired / wireless Internet interworking system and method for P2P content sharing' in which a mobile communication terminal directly participates in a P2P service by placing a relay peer and can directly share contents among peers of the mobile communication terminal, 10-2005-0103050 discloses a method and system for forming a session of a called terminal using an intermediate node in an IP multimedia subsystem for hosting a session in a called terminal using an intermediate node such as an application server connected to an IMS have.

However, in the case of forming a session using an intermediate node, the intermediate node does not know the resource allocation state of the called terminal and does not know the INVITE And the like.

In addition, since the session-based messaging service in the IMS according to the related art is a method of allocating MSRP resources and waiting for connection at the place of transmitting the INVITE, session connection fails due to lack of resources of the calling or receiving terminal, There is a problem in that it can not be provided.

Some embodiments of the present invention provide an IM conversation session management method and an MSRP resource allocation method that can prevent a session connection failure due to lack of resources in an incoming and outgoing terminal using an IM server and an MSRP server.

In addition, some embodiments of the present invention provide an IMS-based IM service providing method and system capable of confirming whether an MSRP session is established by connecting a TCP connection direction for an MSRP session to an MSRP server irrespective of an invitation request direction.

There is also provided a method and system for providing an IMS-based IM service capable of call processing and file transmission for reasonable file transfer according to a response speed and a transmission speed difference in the same session.

In addition, some embodiments of the present invention provide a method of establishing a separate MSRP session to transmit multiple files simultaneously using MSRP.

According to an aspect of the present invention, there is provided a system for providing an Instant Message (IM) service based on an Internet Protocol Multimedia Subsystem (IMS) An IM server for managing an IM conversation message and an IM conversation session for transferring files between connected user terminals, and an IM server for managing IM conversation messages and MSRP (Session Relay Protocol) session resource allocation and IM conversation messages for file transmission Wherein the MSRP server performs MSRP resource allocation for the called user terminal and the originating user terminal, and based on the MSRP resource allocation result, the IM server sets up an IM conversation session Based IM service providing system according to the present invention.

Wherein the MSRP server receives a TCP connection request from the called user terminal and the calling user terminal and receives a NULL-SEND message from the called user terminal and the calling user terminal for confirming MSRP session connection, (SUCCESS-REPPORT) to the calling user terminal, and issue an MSRP session ID used for the IM conversation message transmission.

According to a second aspect of the present invention, there is provided a method for providing an Instant Message (IM) service based on an Internet Protocol Multimedia Subsystem (IMS) Receiving an IM conversation request message from a user terminal and requesting an MSRP resource allocation for transmission of an IM conversation message to an MSRP server, receiving an MSRP resource allocation request from the IM server, Based on an MSRP resource allocation result of the MSRP server, the IM server transmits an SDP INVITE message including MSRP resource allocation information to the called user terminal based on the MSRP resource allocation result And provides a service providing method.

The method of claim 1, wherein the MSRP server receives a TCP connection request from the called user terminal and the calling user terminal, and uses a NULL-SEND message received from the called user terminal and the calling user terminal And providing an incoming MSRP session.

According to a third aspect of the present invention, there is provided a method of processing an Internet Protocol Multimedia Subsystem (IMS) -based file transfer message, the IM server comprising: Requesting an MSRP resource allocation for a file transmission to an MSRP server, receiving an MSRP resource allocation request for file transmission from the IM server, receiving an MSRP resource allocation request for file transmission from the IM server, The method comprising the steps of: allocating an MSRP resource for file transfer, the MSRP server receiving and storing a file to be transmitted from the originating user terminal, and based on the MSRP resource allocation result of the MSRP server, And transmits the SDP INVITE message including the information to the called user terminal Step and provides an IMS-based message file transfer method comprising the step of transmitting the stored file when the message to accept the file transfer request from said called user terminal received in the receiving user terminal to be transmitted to.

The number of the called user terminals may be plural, and the stored file may be provided to each of the called user terminals that have transmitted the file transfer request acceptance message.

In the method of processing an IMS-based file transfer message, the method may further include issuing a new MSRP session ID when a new file transfer is requested.

According to one of the solving means of the present invention, MSRP resource allocation for incoming and outgoing MSs is performed in the MSRP server, thereby simplifying the terminal configuration by eliminating the resource allocation requirement of incoming and outgoing MSs, And provides a method and system for providing an IMS-based IM service that can prevent a session connection failure due to a shortage.

According to another aspect of the present invention, there is provided an IMS-based IM service providing method and system capable of connecting a TCP connection direction for an MSRP session connection to an MSRP server and confirming whether an MSRP session is established or not .

According to another aspect of the present invention, there is provided an IMS-based IM service providing method and system capable of performing call processing and file transmission for a reasonable file transfer even when the response speed and the transmission speed are different within the same session do.

According to another aspect of the present invention, there is provided an IMS-based IM service providing method and system capable of simultaneously transmitting a plurality of files by setting up a separate MSRP session using an MSRP server.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "including" an element, it does not exclude other elements unless specifically stated to the contrary,

All of the multimedia service control procedures provided through the IM service providing system according to an embodiment of the present invention use a Session Initiation Protocol (SIP). SIP is used as a signaling protocol for creating / modifying / terminating an IM service session, and exchanges information for controlling a message session between subscribers desiring to exchange messages. Since the SIP message transmitted through the SIP operates independently of UDP (User Datagram Protocol) and TCP (Transmission Control Protocol), it is independent of the underlying transport protocol, and a Session Description Protocol (SDP) Body).

1 is a diagram illustrating a connection relationship of an IMS-based IM service providing system according to an embodiment of the present invention.

1, a connection configuration of the IM service providing system 200 includes a calling terminal 100, a terminating terminal 300, an HSS (Home Subscriber Server) 210, a CSCF (Call Session Control Function) 220, (CSCF) 221, an I-CSCF (Interrogating-CSCF) 222, and an S-CSCF (Serving-CSCF) 223).

The calling terminal 100 and the terminating terminal 300 can support Internet Protocol (IP) in a voice environment and support UDP / TCP and SIP based on IP, and in particular, It has an application that processes it.

The HSS 210 is a home subscriber server, and manages subscriber information of a calling terminal 100 that transmits a message.

CSCF 220 performs a call session control function and is responsible for IMS-based call processing. The CSCF 220 is logically divided according to the location of the network where the subscriber is located and is divided into a P-CSCF 221, an I-CSCF 222, and an S-CSCF 223 depending on its location and role.

The P-CSCF 221 is a Proxy-CSCF and is the first point at which the calling terminal 100 accesses the IM service providing system 200. The P-CSCF 221 forwards the SIP message delivered from the originating terminal 100 to the I-CSCF 222.

The I-CSCF 222 is the interrogating-CSCF, which is the first port to connect to different home networks (carrier networks) and routes SIP messages received from other home networks to the S-CSCF 223.

The S-CSCF 223 is a Serving-CSCF that manages the session state of the originating terminal 100, stores subscriber information of the originating terminal 100 transmitted from the HSS 210, and associates with the HSS 210 CSCF 221, and forwards the SIP message delivered from the P-CSCF 221 to the I-CSCF 222. The S-CSCF 221 performs an INVITE, i.e., a call request, to the IM server 240.

The IM server 230 is a service server that provides a known instant message service such as MSN, IRC, ICQ, etc., and divides the subscribed users into user identifiers, Manages a list of message recipients and subscriber environment information, and manages IM chat sessions for delivering IM chat messages between on-line users on the Internet.

MSRP server 240 delivers MSRP resource assignment and IM chat message content for sending IM chat messages using SDP for session based messaging services.

In the case of the IM conversation message request, the request message from the originating terminal 100 is transmitted to the IM server 230 via the CSCF server 210, and the IM server 230 confirms the contents of the message, And transmits a request message to the terminal 300. In order to transmit the actual message, the MSRP server 240 requests allocation of the resource reservation, receives the MSRP session identifier to be used for the service, and transmits the MSRP session identifier to the called terminal and the calling terminal.

FIG. 2 is a diagram illustrating a connection relationship of an IMS-based IM service providing system interworking with another network according to an embodiment of the present invention.

2, the connection configuration of the IM service providing system includes an originating terminal 100, a home ISM network 200, another ISM network 400, and a terminating terminal 300.

The home ISM network includes an HSS 210, a CSCF 220, an IM server 230 and an MSRP server 240. The other ISM network includes an HSS 410, a CSCF 420, an IM server 430, And a server 440.

When the message received from the originating terminal 100 is transmitted to the IM server 230 via the CSCF 220 in the case of interworking with the other ISM network 400, The IM server 430 is connected to the ISM network 430 via the CSCF 420 in order to deliver the message to the IM server 230 of the receiving terminal 300. The IM server 430 accesses the receiving terminal 300 Confirm and forward the invitation message. An MSRP session for transmitting the actual MSRP message is established between the originating terminal 100 and the home ISM network, between the MSRP server 240 and the MSRP server 440, between the MSRP server 440 and the terminating terminal 300, And conversation messages, emoticons, icons, and the like are transmitted through this session.

3 is a signal flow diagram illustrating an IMS-based IM service providing method according to an embodiment of the present invention.

3, in step S201, the originating terminal 100 transmits a request message signal INVITE for opening an IM conversation session to the CSCF 220. In step S202, the CSCF server 200 transmits a request message And transmits a response message signal (100 Trying) for a request message signal (INVITE) for establishing a conversation session from the terminal (100) to the calling terminal (100).

In step S203, the CSCF server 100 transmits a request message signal INVITE for establishing a conversation session to the IM server 230, and in step S204, the IM server 230 transmits a conversation of the CSCF server 220 To the CSCF server 220, a response message (100 Trying) to the request message signal INVITE for opening a session.

In step S205, the IM server 230 transmits a request message signal INVITE requesting MSRP resource allocation to the MSRP server 240. In step S206, the MSRP server 240 receives the request message signal INVITE from the IM server 230 To the IM server 230, an acceptance message signal (200 OK) for a request message signal (INVITE) requesting MSRP resource allocation of the MSRP resource.

In step S207, the IM server 230 transmits an SDP message (INVITE) including the MSRP session information allocated by the MSRP server 240 for the calling terminal 100 and the terminating terminal 300 to the CSCF 220 The CSCF 220 transmits an SDP message (INVITE) including the MSRP session information allocated by the MSRP server 240 to the terminating terminal 110 in step S208.

When the MSRP server 240 completes resource allocation for the calling terminal 100 and the terminating terminal 300 in steps S206 to S208, the IM server 230 determines whether the MSRP server 240 allocates resources allocated by the MSRP server 240 And transmits an SDP message (INVITE) including the resource allocation information to the terminating terminal 300 via the CSCF 220.

Next, in step S209, the terminating terminal 300 transmits an acceptance message signal (200 OK) to the CSCF 220, which accepts the request of the IM conversation message from the CSCF 220. In step S210, 220 sends an acceptance message signal 200 OK to the IM server 230 to accept the request for the IM conversation message and in step S211 the IM server 240 sends an accept message (200 OK) to the CSCF 220. In step S212, the CSCF 220 transmits an acceptance message signal 200 OK to the calling terminal 100, which accepts the request of the IM conversation message.

In step S213, the originating terminal 100 transmits an acknowledgment message signal (ACK) to the CSCF 220 to inform the reception of the IM conversation message acceptance message from the terminating terminal 300 , The CSCF 220 transmits an acknowledgment signal message ACK to the IM server 230 in step S214 and the IM server 230 transmits an acknowledgment message ACK in step S215, Lt; / RTI >

The MSRP resource allocation for the talk session between the originating terminal 100 and the terminating terminal 300 is completed through steps S201 to S215.

In step S216, the terminating terminal 300 attempts TCP connection in the direction of the MSRP server 240, and in step S217, the terminating terminal 100 attempts TCP connection in the direction of the MSRP server 240. That is, the transmission of all IM conversation messages is based on the server, and all connection directions are set in the direction from the terminal to the server.

In step S218, when the TCP connection is completed, the MSRP server 240 transmits an empty SEND message (NULL SEND) to the MSRP server 240. In step S219, (200 OK) for the SEND message (NULL SEND) from the receiving terminal (300).

In step S220, the originating terminal 100 transmits an empty SEND message (NULL SEND) to the MSRP server 240. In step S221, the MSRP server 240 transmits a SEND message from the originating terminal 100 (200 OK) to the originating terminal (100).

In step S222, the MSRP server 240 transmits a SEND message (NULL SEND) having no contents to the terminating terminal 110. In step S223, the terminating terminal 110 transmits a SEND message NULL SEND) to the MSRP server 250.

In step S224, the MSRP server 254 transmits a transmission success message (SUCCESS-REPORT) to the calling terminal 100. At this time, both the transmission success message (SUCCESS-REPORT) and the transmission failure message (FAILURE-REPORT) are set so that the message can be confirmed by the sender at the time of arrival on the other party.

In step S225, the terminating terminal 110 transmits an IM conversation message to the MSRP server 240, and in step S226, the calling terminal 100 transmits an IM conversation message to the MSRP server 240. [

The MSRP server 240 receiving NULL SEND from the calling terminal 100 and the terminating terminal 300 in steps S218 to S224 manages two sessions as one IM session and transmits data transmitted from both sides To the other party's session.

The MSRP session allocation success in each MS can be confirmed when NULL SEND is received (S218) or when a transmission success message (SUCCESS-REPORT) is received (S224). If at least one of these two messages is received, It can be determined that the message is ready to be delivered and the message transmission can be started.

4 is a signal flow diagram illustrating an IMS-based file transfer message processing process according to an embodiment of the present invention.

In step S301, the originating terminal 100 transmits a re-request message signal (re-INVITE) requesting file transmission to the CSCF 220. In step S302, the CSCF 220 transmits a re- To the originating terminal 100, a response message signal (100 Trying) for a re-request message signal (re-INVITE) requesting file transmission from the originating terminal 100.

In step S303, the CSCF 220 transmits a re-request message signal re-INVITE requesting file transfer to the IM server 230. In step S304, the IM server 230 transmits a re- And transmits a response message signal (100 Trying) to the CSCF (220) for a re-request message signal (re-INVITE) requesting file transmission.

In step S305, the IM server 230 transmits a re-request message signal (re-INVITE) requesting MSRP resource allocation for file transfer to the MSRP server 240, and in step S306, To the IM server 230, an acceptance message signal (200 OK) for a re-request message signal (re-INVITE) requesting the MSRP resource allocation from the IM server (230).

The IM server 230 transmits an SDP message signal RE-INVITE including the MSRP session information that the MSRP server 240 has allocated for file transmission between the originating terminal 100 and the terminating terminal 300 in step S307, The CSCF server 220 transmits the SDP message signal RE-INVITE including the MSRP session information allocated by the MSRP server 240 to the terminating terminal 110 in step S308 do.

When the MSRP server 240 completes the resource allocation for the file transmission between the originating terminal 100 and the terminating terminal 300 in steps S307 to S308, the IM server 230 transmits the MSRP server 240 (INVITE) including the resource allocation information allocated by the CSCF 220 to the terminating terminal 300.

Next, in step S309, the IM server 240 transmits a re-request message signal (re-INVITE) requesting file transfer to the terminating terminal 500 to the CSCF 220, and in step S310, the CSCF 220 Transmits an SDP message signal (re-INVITE) including the allocated MSRP session information to the terminating terminal 120.

In step S311, the receiving terminal 300, which is one of a plurality of terminals for receiving a file, transmits an acceptance message signal 200 OK to the CSCF 220 to accept the file transfer, and in step S312, 220 sends an acceptance message signal 200 OK accepting the file transfer to the IM server 230. In step S313 the IM server 230 sends an acceptance message signal 200 OK accepting the file transfer To the terminal (100).

In step S314, the originating terminal 100 completes the session setup for file transmission and sends an acknowledgment message signal (ACK) to the CSCF 220 indicating that the file transfer acceptance message has been received from the terminating terminal 300 In step S315, the CSCF server 220 transmits an acknowledgment message signal (ACK) to the IM server 240 for completing a session setup for file transmission and setting up an MSRP session. In step S316, The server 240 transmits a receipt acknowledgment message signal (ACK) to the terminating terminal 110 for completing a session setup for file transmission and setting up an MSRP session.

MSRP resource allocation for file transmission between originating terminal 100 and terminating terminal 300 is completed through steps S301 to S316.

The MSRP server 240 transmits a SEND message (NULL SEND) from the terminating terminal 300 to the MSRP server 240 in step S317, (200 OK) to the calling terminal 300 for the NULL SEND.

In step S319, the originating terminal 100 transmits an empty SEND message (NULL SEND) to the MSRP server 240. In step S320, the MSRP server 240 transmits a SEND message from the originating terminal 100 (200 OK) to the originating terminal (100).

In step S321, the MSRP server 240 transmits a SEND message (NULL SEND) having no contents to the terminating terminal 300. In step S322, the terminating terminal 300 transmits a SEND message NULL SEND) to the MSRP server 240.

In step S323, the MSRP server 240 transmits a transmission success message (SUCCESS-REPORT) to the calling terminal 100. At this time, both SUCCESS-REPORT and FAILURE-REPORT are set so that the message can be confirmed by the sender at the time of arrival on the other party.

In step S324, the originating terminal 100 transmits a file to be transferred to the MSRP server 240. In step S325, the MSRP server 240 transmits an acceptance message (200 OK) In step S326, the MSRP server 240 transmits the corresponding file to the terminating terminal 110. In step S326,

Meanwhile, in step S327, the receiving terminal 500, which is one of the plurality of terminals receiving the file, transmits an acceptance message (200 OK) for file reception to the MSRP server 240 after a lapse of time.

In step 328, the terminating terminal 500 sends an acceptance message (200 OK) to the CSCF server 220 to accept the file transfer, and in step 329 the CSCF server 220 receives an accept message (200 OK) to the IM server 230. In step S330, the IM server 230 transmits an acknowledgment message (ACK) to the CSCF server 220 notifying the acceptance of the file transfer to the CSCF server 220. In step S331 The CSCF server 220 transmits an acknowledgment message (ACK) informing the acceptance of the file transfer to the terminating terminal 120.

In step S332, the terminating terminal 120 transmits an empty SEND message (NULL SEND) to the MSRP server 240. In step S333, the MSRP server 250 transmits a SEND message from the terminating terminal 120 The MSRP server 250 transmits the acceptance message 200 OK to the terminating terminal 300 in step S334 and transmits the acceptance message 200 OK to the terminating terminal 120 in step S334.

As described above, when transmitting / receiving a file between a plurality of subscribers in a conversation, a file transfer request message is processed using a re-INVITE message so that file transmission / reception is possible according to the will of the recipient.

In the case of such a multi-file transfer, there may be a time difference when the receiver refuses to receive the file or accepts the file reception. Therefore, according to the IM service providing system according to the embodiment of the present invention, when at least one of the conversation participants accepts MSRP-based file transmission, the corresponding file is temporarily stored When the acceptance message of another participant is received in the future, the MSRP server transmits the corresponding file to the terminal that accepted the transmission of the file as in step S334. Therefore, there is no need to upload new files for other participants who have accepted file transfers in the future.

Also, if the files are not downloaded at the same speed due to the speed difference according to the access network of the terminating terminal 300 or 500, the previous file transfer may be in progress according to each terminal. In this case, a new MSRP session ID is issued through re-INVITE and the file is transmitted through another MSRP session to prevent conflict with the existing file transmission.

5 is a detailed configuration diagram of an IM server according to an embodiment of the present invention.

5, the IM server 230 includes a signal receiver 231, a signal transmitter 232, a signal analyzer 233, and a session controller 234.

The signal receiving unit 231 receives the SIP message signal related to the IM session setup for transmission of the IM conversation message and transmission of the file from the CSCF server 220, the MSRP server 240 and the receiving terminal 300. [

The signal analyzer 233 analyzes the SIP message signal associated with the IM session setup received from the signal receiver 231.

The signal transmitter 232 transmits the SIP message signal corresponding to the corresponding SIP message signal to the CSCF server 220, the MSRP server 240 and the terminating terminal 300 based on the analysis result of the signal analyzer 233 .

The signal session control unit 234 controls the transmission and reception of SIP message signals related to IM session establishment for transmission of IM conversation messages and file transmission.

6 is a detailed configuration diagram of an MSRP server according to an embodiment of the present invention.

6, the MSRP server 240 includes a signal transmission unit 241, a signal reception unit 242, a resource allocation logic unit 243, a message transmission unit 244, a message reception unit 245, a message session control unit 246, And a buffer unit 247.

The signal receiving unit 242 receives the SIP message signal related to the MSRP resource allocation for the transmission of the IM conversation message and the file transmission from the IM server 230. [

The signal transmission unit 241 transmits an SIP message signal related to the MSRP resource allocation related to the IM conversation message and the file transmission to the IM server 230. [

The resource allocation logic unit 243 allocates MSRP resources based on the SIP message signal received through the signal receiving unit 242. [ That is, when an MSRP resource allocation request message signal for transmission of an IM conversation message and a file transmission is received from the IM server 230, an MSRP resource is allocated to the received message.

The message transmitting unit 244 transmits an SIP message for confirming each session connection with the calling terminal 100 and the terminating terminal 300 when the IM chat message transmission and the MSRP resource allocation for the file transmission are completed.

Upon completion of the MSRP resource allocation for the IM conversation message transmission and the file transmission, the message reception unit 245 receives a SIP message for confirming whether or not each session connection with the calling terminal 100 and the terminating terminal 300 is established.

The message session control unit 246 controls transmission and reception of SIP messages for confirming each session connection with the calling terminal 100 and the terminating terminal 300 when the MSRP resource allocation for the IM conversation message transmission and the file transmission is completed.

The buffer unit 247 stores the file transmitted and received between the calling terminal and the called terminal until the conversation session ends.

One embodiment of the present invention may also be embodied in the form of a recording medium including instructions executable by a computer, such as program modules, being executed by a computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

While the methods and systems of the present invention have been described in connection with specific embodiments, some or all of those elements or operations may be implemented using a computer system having a general purpose hardware architecture.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

3 is a diagram for explaining a message transmission step in an IMS-based IM service providing method according to an embodiment of the present invention.

DESCRIPTION OF THE REFERENCE SYMBOLS

100: originator terminal 200: home IMS network

210: HSS 220: CSCF

211: P-CSCF 212: I-CSCF

213: S-CSCF 230: IM server

240: MSRP server 300: incoming terminal

400: other IMS network 410: HSS

420: CSCF 430: IM server

440: MSRP server

Claims

An instant messaging (IM) service providing system based on an Internet Protocol Multimedia Subsystem (IMS)

An IM server for managing an IM conversation message between user terminals accessing the portable Internet and an IM conversation session for transferring a file,

And an MSRP server for delivering contents of an IM chat message between the user terminals and a message session relay protocol (MSRP) session resource allocation for file transmission and an IM chat message,

Wherein the MSRP server performs MSRP resource allocation for an incoming user terminal and an originating user terminal, and the IM server establishes an IM conversation session based on the MSRP resource allocation result.

The method according to claim 1,

Wherein the MSRP server receives a TCP connection request from the called user terminal and the calling user terminal.

The method according to claim 1,

Wherein the MSRP server receives a NULL-SEND message for confirming MSRP session connection from the called user terminal and the calling user terminal.

The method according to claim 1,

And the MSRP server transmits a transmission success message (SUCCESS-REPORT) for the NULL SEND message to the calling user terminal.

The method according to claim 1,

And the MSRP server issues an MSRP session ID used for IM conversation message transmission.

The method according to claim 1,

The IM server,

CSCF, a MSRP server, a signal receiving unit for receiving an SIP message signal related to an IM session setup for transmitting an IM conversation message and a file transmission from the user terminal,

A signal analyzer for analyzing an SIP message signal related to the IM session setup received from the signal receiver,

A signal transmitter for transmitting an SIP message signal corresponding to the SIP message signal to the CSCF, the MSRP server, and the called user terminal based on the analysis result of the signal analyzer;

A signal session control unit for controlling transmission / reception of a SIP message signal related to IM session setting for IM conversation message transmission and file transmission;

And an IMS-based IM service providing system.

The method according to claim 1,

The MSRP server,

A signal receiving unit for receiving a SIP message signal related to MSRP resource allocation for transmission of IM conversation message and file transmission from the IM server,

A signal transmitter for transmitting to the IM server a SIP message signal related to the MSRP resource allocation related to the IM conversation message and the file transmission;

A resource allocation logic unit for allocating MSRP resources based on the SIP message signal received through the signal receiver,

A message transmission / reception unit for transmitting / receiving a SIP message for confirming whether or not a session is established with each user terminal when the MSRP resource allocation for transmission of the IM conversation message and the file transmission is completed,

A message session controller for controlling transmission and reception of SIP messages for confirming a session connection with each user terminal when the MSRP resource allocation for the IM conversation message transmission and the file transmission is completed,

A buffer unit for storing a file transmitted and received between the always-

And an IMS-based IM service providing system.

A method for providing an Instant Message (IM) service based on an Internet Protocol Multimedia Subsystem (IMS)

The IM server receives an IM chat request message from the user terminal and requests MSRP resource allocation for transmission of the IM chat message to the MSRP server,

MSRP server requesting MSRP resource allocation from the IM server and allocating MSRP resources for an incoming user terminal and an originating user terminal;

Transmitting, by the IM server, an SDP INVITE message including MSRP resource allocation information to the called user terminal based on MSRP resource allocation result of the MSRP server

Based IM service.

9. The method of claim 8,

The MSRP server receiving a TCP connection request from the called user terminal and the calling user terminal;

Providing an incoming MSRP session using the NULL-SEND message received from the called user terminal and the calling user terminal

Based IM service.

A method of processing an Internet Protocol Multimedia Subsystem (IMS) -based file transfer message, the method comprising:

The IM server receives a file transfer request message from an originating user terminal and requests MSRP resource allocation for file transfer to an MSRP server,

The MSRP server receiving an MSRP resource allocation request for file transmission from the IM server and allocating an MSRP resource for file transmission between the called user terminal and the calling user terminal,

The MSRP server receives and stores a file to be transmitted from the calling user terminal,

The IM server transmits an SDP INVITE message including MSRP resource allocation information to the called user terminal based on MSRP resource allocation result of the MSRP server;

Transmitting the stored file to the called user terminal when a message accepting a file transmission request is received from the called user terminal

Based file transfer message.

11. The method of claim 10,

Wherein the number of the called user terminals is plural, and the stored file can be provided to each of the called user terminals that have transmitted the file transfer request acceptance message.

12. The method of claim 11,

And if a new file transfer is requested, issuing a new MSRP session ID.