KR20100057409A - Method of transmitting an instant message - Google Patents

Abstract

PURPOSE: A method of transmitting an instant message are provided to transfer to use already connected session to connect the sending terminal and receiving terminal and transferring an instant message, thereby shortening the message transmission time. CONSTITUTION: A service providing server(80) inquires the stat condition of receiving terminal if a conversation request using SIP is received from the receiving terminal. If the receiving terminal can receive an instant message, the service providing server connects a session of the sending terminal and the receiving terminal. The service providing server relays an instant message between the sending terminal and the receiving terminal.

Description

How to send an instant message {METHOD OF TRANSMITTING AN INSTANT MESSAGE}

The present invention relates to a message transmission method, and more particularly, to an instant message transmission method using a wireless terminal.

An instant message refers to a message transmitted by two or more instant (real-time) communication using various types of networks, and a medium for transmitting and receiving such instant messages is called an instant messenger.

Such instant messages are generally made between wired terminals, such as the Internet, but have recently been used between wireless terminals or between wireless terminals and wired terminals.

Among these, in the instant messaging service provided between wired terminals, a user who wants to send an instant message (hereinafter, simply referred to as a 'sender') logs in to an instant messenger using a terminal such as a computer, and then selects a desired party ( In the following, the callee simply selects the called party to send an instant message. At this time, the instant messenger displays the logged out state for the user who is not logged in to the instant messenger, so that the caller can select a called party who can receive the instant message.

However, in an instant messaging service between wireless terminals or between a wireless terminal and a wired terminal, the caller may not know that the status of the called terminal is not logged in the instant messenger, so that even if the instant message is transmitted, a chat session is generated. It may not be.

In this case, that is, when the session connection between the calling terminal and the receiving terminal is impossible, the conventional instant message transmission method ends the instant message transmission and uses the other text message (SMS, MMS) method to send the instant message to the receiving terminal. You are sending a message that tells you that you have received it.

At this time, when the called party checks the text message and the like, logs in to the instant messenger using his terminal and requests an instant message check, the instant messenger outputs the instant message sent by the first sender. In addition, when the called party requests the first sender to send an instant message, a conversation session is created between the called party and the first sender so that the instant message can be exchanged.

However, in the conventional instant message transmission method as described above, in a state where the initial conversation line is not connected, a separate conversation session connection process must be performed in order for the called party to transmit the instant message to the caller. There is an inconvenience.

An object of the present invention for solving the above problems, while the service providing server stores the instant message that was not delivered between the calling terminal and the called terminal, when the receiving terminal requests to receive the instant message, the calling terminal and the service providing server The present invention provides a method for transmitting an instant message for connecting an session of a calling terminal and a called terminal using a session already connected between the two terminals so that an instant message can be delivered.

In order to achieve the above object, the present invention provides a method for transmitting an instant message applied to a service providing server, wherein when a conversation request using a SIP is received from a calling terminal, the service providing server inquires the status information of the called terminal. step; If the called terminal can receive the instant message as a result of the status information inquiry, the service providing server connects the session of the calling terminal and the called terminal and relays the instant message between the calling terminal and the called terminal. step; A storage step of storing, by the service providing server, an unreceived instant message transmitted from the calling terminal, when the called terminal cannot receive an instant message as a result of the status information inquiry; An unreceived instant message transmitting step of transmitting, by the service providing server, the unreceived instant message to the called terminal when the state information of the called terminal is updated; And transmitting, by the service providing server, a session between the calling terminal and the called terminal when the unreceived instant message is transmitted, and relaying an instant message between the calling terminal and the called terminal so that the instant message is transmitted.

The present invention stores an instant message that has not been delivered between the calling terminal and the called terminal, while requesting receiving an instant message from the called terminal, the calling terminal uses a session already connected between the calling terminal and the serving server. By connecting the session of the called terminal with the instant message is delivered, there is an excellent effect that can increase the completion rate of the conversation and shorten the message transmission time.

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

1 is a diagram illustrating an embodiment of an IMS network to which an instant message transmission method according to the present invention is applied.

Internet Protocol Multimedia Subsystem (hereinafter, simply referred to as 'IMS') to which the present invention is applied is introduced to provide an IP-based packet communication service in a third generation mobile communication network. The logical structure of the network includes a radio network domain, a GPRS packet switched service domain, and an IMS network.

Here, the basic service goal pursued by IMS is to provide a complex of multimedia such as voice, audio, video, and data based on IP protocol, and to build an infrastructure capable of rapid service development and change. In other words, the main motivation for introducing IMS is to accommodate rich content and new service capability through packet service as an integrated network.

On the other hand, the IMS network to which the present invention is applied, as shown in Figure 1, the calling terminal 10, the called terminal 20, the originating proxy call session control function (P-CSCF) server 30, the service call session Control function (S-CSCF) server 40, called party proxy call control function (P-CSCF) server 50, additional service (AS) server 60 and the like.

The P-CSCF server 30 is a first point of point at which the end users terminal 10 and 20 access the IMS network. The P-CSCF server 30 serves as a proxy and a user agent, and receives a SIP registration request received from the end user terminal. Performs a function of forwarding a message to S-CSCF by referring to the user's home domain. In addition, the P-CSCF forwards the Session Initiation Protocol (SIP) message received from the end user terminal to the S-CSCF using the S-CSCF address received through the registration procedure, while requesting a SIP message from the end user terminal. Or responds.

The S-CSCF server 40 actually exists in the home network of the terminal as a functional node that processes and manages the SIP session state of the terminal.

The AS server 60 is to provide various kinds of additional services, and provides additional services in connection with the S-CSCF. That is, the AS server provides an application service using SIP, for example, a call forwarding or call reject function, a charging function, and the like, and in particular, a service providing server to be described below in the present invention. It can work as

The calling terminal 10 and the called terminal 20 may be applied to a wireless terminal applicable to the IMS network.

In order to use the service in the IMS network as described above, session setup is performed between end user terminals using SIP. After the session is set up, an actual bearer is formed between the end user terminals to exchange data.

SIP is a signaling protocol and is an application level signaling protocol in which intelligent terminals wishing to communicate on the Internet identify each other, find their location, and specify a procedure for creating, deleting, and changing a multimedia communication session between them.

In the communication using SIP, a caller terminal transmits a message in a text format to the called terminal in order to create a new session with the callee terminal or to join the caller in an existing session. The actual content of the session thus established is generally described, including one or more media formats such as audio, video, text or whiteboard.

In the IMS network as described above, there are basically various types of message services that allow users to exchange IP-based user messages with each other, and the dual instant message service provides a simple user message or a short media message. The Session Initialization Protocol (hereinafter, simply referred to as 'SIP') used for initiating communication is carried on a SIP message exchanged through a session. In addition, a message service that enables users to exchange IP-based user messages with each other includes session-based message service implemented by signaling in a Session Initiation Protocol (SIP) session and data transmission through a Message Session Relay Protocol (MSRP) session. However, since the session-based message service is not directly related to the present invention, a detailed description thereof is omitted.

That is, the IMS network includes a P-CSCF server, an S-CSCF server, and the like, which manage procedures related to all calls or sessions as described above, and all user messages 101 in the instant message service include CSCF servers. It is carried on SIP messages through the network.

On the other hand, the instant message transmission method according to the present invention, even if the session for the instant message transmission between the calling terminal and the called terminal is not connected, so that the calling terminal can continuously send an instant message, the present invention for this purpose Has a service providing server that stores an instant message transmitted by the calling terminal 10 and continuously performs instant message transmission through a session connection with the calling terminal, which will be described with reference to FIG. 2. do.

2 is a block diagram of an instant message transmission system to which an instant message transmission method according to the present invention is applied. The instant message transmission system shown in FIG. 2 may be configured based on the IMS network shown in FIG. have. Meanwhile, the service providing server 70 illustrated in FIG. 2 may be configured as one of the AS servers 60 among the various servers of the IMS network illustrated in FIG. 1.

That is, in the instant message transmission method according to the present invention, when the calling terminal 10 transmits an instant message to the called terminal 20, the called terminal is offline or an instant message server (hereinafter, simply referred to as an 'IM server'). 80 is not logged in, so that even if the communication between the calling terminal and the called terminal is not completely connected (session connection state), the calling terminal can continuously send an instant message. In addition, the present invention, when the called party confirms that the above instant message is being received through a separate method, accesses the IM server through the called terminal, a separate session connection process or separate for transmitting and receiving an instant message with the calling terminal. Without going through the setting process of, the calling terminal is to be able to immediately send an instant message through the connected session.

To this end, the instant message providing system to which the present invention is applied includes a calling terminal 10 used by a caller for sending an instant message, a called terminal 20 for receiving an instant message, and a calling terminal and a receiving terminal. And a service providing server 70 for relaying instant messages therebetween.

In this case, the service providing server 70 is applied to the IMS network as described above, and may be configured as one of the AS servers 60 constituting the IMS network. This is explained with reference to FIG. 3. On the other hand, the IM server 80 to be described below is based on the function of the Deferred Function described in OMA IM. However, the IM server is not based on the function of the Deferred Function, and one of the various functions of the IM corresponds to the Deferred Function. The OMA IM specification describes the Deferred Function for storing conversation messages.

3 is a diagram illustrating an internal configuration of an unreceived message server of the instant message providing system of FIG. 2. 4 to 6 illustrate an interworking structure of data implemented in the instant message providing system illustrated in FIG. 2, FIG. 4 illustrates an interworking structure for an unreceived message, and FIG. 5 illustrates an SMS interworking structure. 6 shows an interworking structure for acknowledgment of an unreceived message.

In order to implement the instant message transmission method according to the present invention, as shown in FIG. 2, the service providing server 70 communicates with the S-CSCF server as one of the AS servers of the IMS network, thereby providing a basic instant message transmission function. IM server 80 for performing the operation and the unreceived message storage server 90 for managing the instant message transmitted from the calling terminal even when the session for the instant message transmission between the calling terminal and the receiving terminal is not connected.

The IM server 80 performs a function for implementing a basic instant message service as described above.

Unreceived message storage server 90 is for implementing the core functions of the present invention, SIP handler (91), MSRP handler (92), DM handler (93), SMS handler (94), DB handler (96) It is configured to include.

The SIP handler 91 processes a SIP message received from an IM server and an originating terminal using a SIP stack, and transmits a response message thereto. In addition, the SIP handler creates and releases the SIP Dialog and performs the function of creating the MSRP Session using the Function Call of the MSRP handler.

MSRP Handler 92 handles Function Call for creating and releasing MSRP Session executed in SIP Handler, and handler for each Msrp Session Type according to IM Message (MSRP Message) received. Perform a function to operate. That is, when the Msrp Session Type is VAS Type, the VAS handler is operated. In case of the AUTO-ANSWER Type, the DM handler is operated. In the case of the SMS Type, the SMS handler is operated.

The DM handler (Deferred Msg Handler) 93 is called by the MSRP handler, and the DB handler uses information such as 'From_user', 'To_user', 'Body' and 'IM_Session Uri' in the CPIM Header and Body of the corresponding MSRP message. To save.

The SMS Handler 94 is called by the MSRP handler and performs a function of transmitting the contents of the corresponding MSRP message to the SMS. In addition, the SMS handler performs a charging processing function when the SMS transmission is normally performed. Here, the SMS handler does not necessarily perform only a short message service (SMS), but may transmit various types of messages such as MMS and LMS.

The DB handler 96 performs DB basic interface functions such as DB connection, storage, query, change, and delete function.

On the other hand, Figures 4 to 6 is an exemplary view showing the interworking structure of the data implemented in the data implemented in the service providing server shown in Figure 3, first, Figure 4 shows the interworking for the unreceived message. That is, when the IM session type is "AUTO-ANSWER" when receiving the INVITE from the CSCF of the calling terminal, it creates an MSRP Session of the "AUTO-ANSWER" type and requests an SMS Invoke. In addition, MSRP messages received in the created MSRP Session are stored using the DM handler. In addition, if a normal storage is made, a response to the MSRP message and a REPORT 202 Accepted are transmitted, and the MSRP Session created when BYE is received from the CSCF is released. In detail, FIG. 4 illustrates a session establishment step for storing a conversation message in an IM server when the called terminal is IM offline. The IM server determined to be offline indicates an msrp session for storing an instant message. This section describes how to request the msrp handler to create a chat session, send an SMS invoke to induce a conversation to be received offline, and then save the chat message sent through the chat session created from the calling terminal. .

Next, FIG. 5 illustrates the interworking of the SMS. When the IM session type is “SMS” when the INVITE is received from the P-CSCF, an MSRP session of the “SMS” type is generated. MSRP message received in the created MSRP Session is sent through SMS handler, and the response to the MSRP message and REPORT 202 Accepted are sent. If the SMS transmission is successful, a message for billing processing is sent to the CF. Also, releases the MSRP Session created when receiving BYE from PF. In detail, FIG. 5 is a diagram illustrating a process of transmitting an instant message by SMS when the called terminal is a terminal which cannot use an instant message.

Next, Figure 6 shows the interworking for confirming the unreceived message, IMGW (or NEW.UE) transmits a message message to query the list of the deferred message (this process is performed by the register specified in the GW Prococol standard) Afterwards). Upon receiving the message, the MIMSDFX requests a list of deferred messages or requests a deferred message according to the XML type information of the corresponding message, and transmits the information on the response message. If the message is sent, the message for billing processing is transmitted. In detail, FIG. 6 is for explaining a function of inquiring whether there is an unreceived message left when the called terminal receives a conversation participation inducing SMS. The receiving terminal lists a list of unreceived messages in the step of logging into the IM server. After checking whether there is a list of unreceived messages, the unreceived messages corresponding to the list are retrieved from the IM server.

On the other hand, in the description of Figures 4 to 6 PF and CF both means a block responsible for the function of the IM. That is, the SIP message sent by the calling terminal arrives at the IM server, and the block that receives and processes the received SIP message is a Participating Function (PF), and the PF delivers the message to a CF (Controlling Function) in charge of creating and managing a chat room. do. IMGW refers to a server that converts SIP protocols to provide IM services to legacy terminals that cannot handle SIP.

Hereinafter, the instant message transmission method according to the present invention implemented in the instant message system configured as described above will be described in detail with reference to FIG.

7 is a flowchart illustrating an embodiment of an instant message transmission method according to the present invention.

The present invention is characterized in that instant message storage, inquiry, and message transfer after creating a chat session can provide services with continuity in one call flow. That is, the present invention stores the instant message transmitted by the calling terminal at the same time as the conversation request using the service providing server 70 that can query the status information of the called terminal, the session is connected between the called terminal and the calling terminal. When the stored message is delivered to the connected session, the conversation completion rate is increased while the message transmission time is reduced.

In detail, the prior art required an additional message transmission step for transmitting an SMS when the session was incapable of connection. According to the present invention, an instant message transmitted at the same time as a request for a conversation may be sent to an instant message, an SMS, The message box may be selectively stored and transmitted by using a message box, and the caller may simultaneously send an instant message while inviting a conversation partner.

To this end, in the dialogue request step 702 using the SIP, the IM server 80 of the service providing server 70 receives the instant message by inquiring the status information of the called terminal 20 through the presence server (704). If it is not possible (706), a temporary proxy session is established (708, 710) with an unreceived message storage server 90 that can store the instant message to be sent while inviting the contact (708, 710). To be stored on the storage server (712, 714, 716).

In this case, the unreceived message storage server storing the message transmitted before the session creation may select a delivery method such as SMS, session connection, and message storage according to the state of the called terminal inquired from the presence server. That is, the non-received message storage server induces the participation of the conversation in the called party by sending a message (SMS) for inviting the called party to the called terminal (718). This function can also be accomplished by the IM server.

Until the above process, the session connection for transmitting and receiving instant messages between the calling terminal and the called terminal is not yet performed. However, the sender may continuously input an instant message to be sent to the called terminal by using the calling terminal, and the instant message input and transmitted from the calling terminal is stored by the DB handler of the unreceived message storage server (720 to 730). ).

On the other hand, when the called party receiving the conversation invites the called terminal, and the called terminal updates its status information to the presence server (732), the presence server notifies the IM server that the status information of the called terminal has been updated (734).

At this time, when the IM server attempts to connect the conversation session with the called terminal, when the conversation session is generated (748, 750, 752), the IM server terminates the temporary session that is temporarily connected to the unreceived message storage server (754, 756, 758, 760) Then, the calling terminal and the called terminal send and receive instant messages through the IM server in a general manner (762, 764).

On the other hand, while a new conversation session is connected between the calling terminal and the called terminal (748 to 752), when a request for querying an unreceived instant message list is received from the called terminal (736), the service providing server (unreceived message storage server or IM server) In operation 740 to 744, the stored instant message list and the message are transmitted to the called terminal. That is, in the present invention, when the receiving terminal inquires about an unreceived message and at the same time it is confirmed that the receiving terminal is connected to the presence server, a session transfer occurs. At this time, an instant message transmitted during the session transfer is buffered in the IM server and then delivered. . Also, the unreceived message storage server transmits the message while automatically deleting the message sent to the called terminal.

Briefly summarized the present invention as described above is as follows.

That is, the IM server that receives the conversation invitation and the instant message may query the status of the called terminal and invite the conversation to deliver the message when the status of the called terminal is online.

However, if the called terminal is off-line, it requests a temporary session connection to an unreceived message storage server capable of creating a temporary session and stores an instant message delivered before the called party joins the conversation. 702 to 730). That is, after the temporary session is connected and before the called terminal joins the conversation, the unreceived instant message sent by the caller is stored in the unreceived message storage server, and the unreceived message is not deleted even after the caller ends the conversation.

The service providing server (unreceived message storage server or IM server) transmits a chat participation message (SMS, etc.) to induce a chat participation when the called terminal is offline (718) so that the called terminal runs the IM application (718). ).

On the other hand, when the IM application is driven in the called terminal, the state of the called terminal is updated to the receiving side presence server (732).

When the state of the called terminal is changed, a status change notification comes down to the IM server (734), and it is determined that the IM server requests a conversation invitation to the called terminal (748, 750, 752).

When the conversation accept response from the called terminal returns to the IM server, the IM server switches between the previously created session and the newly created called terminal. At this time, if the unreceived message is stored in the unreceived message storage server, before creating a new session between the IM server and the called terminal, the unreceived message storage server transmits the unreceived message to the called terminal through the existing session. After all unreceived messages are sent to the called terminal, the IM server creates a new session between the IM server and the called terminal. On the other hand, if the unreceived message is stored in the unreceived message server, and after the temporary conversation session is terminated, if the called terminal runs the IM application, the unreceived instant message before performing the process of connecting the conversation between the calling terminal and the called terminal Through the process of querying, the called terminal may receive an unreceived message sent to it from the unreceived message storage server.

In the above process, the process of transmitting an unreceived message to the called terminal by the unreceived message storage server may be performed when a request for inquiry of an unreceived message from the called terminal is changed (736) while the state of the called terminal is changed (736). When the state of the called terminal is changed through the server (732), the IM server may automatically transmit the unreceived message storage server.

When the transmission of the unreceived message to the called terminal is completed, the IM server requests the temporary session deletion and terminates the session switching process (754, 756, 758, 760).

Thereafter, the calling terminal and the called terminal transmit and receive instant messages according to a general instant message transmission method through the IM server (762, 764).

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1 is a configuration diagram of an embodiment of an IMS network to which an instant message transmission method according to the present invention is applied.

2 is a block diagram of an embodiment of an instant message transmission system to which an instant message transmission method according to the present invention is applied.

3 is a block diagram illustrating an internal configuration of an unreceived message server of the instant message providing system shown in FIG.

4 to 6 are exemplary diagrams illustrating an interworking structure of data implemented in the instant message providing system illustrated in FIG. 2.

7 is a flowchart illustrating an embodiment of a method for transmitting an instant message according to the present invention.

<Description of Major Symbols in Drawing>

10: calling terminal 20: called terminal

30: calling party P-CSCF server 40: S-CSCF server

50: called party P-CSCF server 60: AS server

70: service providing server 80: IM server

90: unreceived message storage server

Claims (7)

In the instant message transmission method applied to the service providing server, An inquiry step of inquiring, by the service providing server, the status information of the called terminal when the conversation request using the SIP is received from the calling terminal; If the called terminal can receive the instant message as a result of the status information inquiry, the service providing server connects the session of the calling terminal and the called terminal and relays the instant message between the calling terminal and the called terminal. step; A storage step of storing, by the service providing server, an unreceived instant message transmitted from the calling terminal, when the called terminal cannot receive an instant message as a result of the status information inquiry; Transmitting an unreceived instant message by the service providing server to transmit the unreceived instant message to the called terminal when the status information of the called terminal is updated; And When the unreceived instant message is transmitted, the service providing server connects the session of the calling terminal and the called terminal, and relays an instant message between the calling terminal and the called terminal, the instant message transmission comprising the step of transmitting an instant message Way. The method of claim 1, The service providing server, And if the called terminal cannot receive an instant message as a result of the status information inquiry, further comprising a text message transmitting step of transmitting a text message for inducing a conversation to the called terminal. The method of claim 1, And the status information inquiry and status information update notification are made by communication between the service providing server and a receiving side presence server. The method of claim 1, The storing step of storing the unreceived instant message, If the called terminal cannot receive the instant message as a result of the status information inquiry, the IM server of the service providing server establishes a temporary session with an unreceived message storage server of the service providing server and fails to receive the received message storage server. And when the instant message is transmitted, the unreceived message storage server stores the unreceived instant message. The method of claim 4, wherein The unreceived instant message transmission step, And when the status information of the called terminal is updated to the IM server, the unreceived message storage server transmits the unreceived instant message to the called terminal. The method of claim 4, wherein The unreceived instant message transmission step, It is transmitted to the IM server that the status information of the called terminal has been updated, and when there is an unreceived message inquiry request from the called terminal, the unreceived message storing server transmits the unreceived instant message to the called terminal. How to send instant messages. The method of claim 4, wherein The transmitting step for transmitting the instant message, When the status information of the called terminal is notified online from the presence server, the IM server terminates the temporary session with the unreceived message storage server and connects the session of the calling terminal and the called terminal. How to send instant messages.

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