KR20150118077A - System and method for initiating session when specific condition is satisfied - Google Patents

Abstract

In the present invention, disclosed is a method and procedure for opening a session when a particular condition is satisfied in a messaging service system such as SIMPLE Instant Messaging (IM), push to talk over cellular (PoC), and converged IP messaging (CPM) services. To this end, according to the present invention, the method comprises the steps of: providing a particular condition in a client to a server after separating a pre-define group, an ad-hoc group, and a one-to-one case; and opening a session with a corresponding member when the particular condition is satisfied in the server. Accordingly, a session having a particular condition determined by a client and applied thereto is opened in an SIP session-based system, so a differentiated messaging service can be provided.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and method for establishing a session when a specific condition is satisfied,

The present invention relates to a system and method for establishing a session in a SIP (Session Initiation Protocol) session based messaging service environment, and more particularly, to a system and method for establishing a session when a specific condition is satisfied.

A session creation method for providing a group messaging service in a general SIP session-based messaging system is largely divided into a one-to-one session, an ad-hoc group session, and a pre-defined group session Respectively. The process of creating an ad hoc group session will be described with reference to FIG. In FIG. 1, a client is a SIP application-based client that resides in a user terminal and is responsible for a messaging service, enables a user to access a messaging service, and performs a role of creating / modifying / terminating a SIP session.

In order to explain a process of establishing a session between a plurality of clients, FIG. 1 illustrates a case where a client A 100 requests a client B 110 and a client C 115 to open an ad-hoc group messaging session. In step 120, the client A 100 creates an INVITE message and transmits the INVITE message to the SIP application server 105. At this time, the INVITE message may include information about a client to be invited. For example, the client A (100) applies the conference factory URI to the Request URI value of the INVITE message, and transmits the URI including the media and session information to be used by the client factory. Accordingly, when the Request URI of the INVITE message corresponds to the conference factory URI, the server 105 performs a conference function and a participating function. Accordingly, the server 105 establishes and manages an ad-hoc group messaging session based on the INVITE message sent by the client A (100).

In step 125 and step 130, the server 105 transmits the INVITE message including the media and session information to be used by the client A 100 to the client B 110 and the client C 115, respectively. After receiving the INVITE message, the client B 110 and the client C 115 may respond according to the user's decision. When the client B 110 or the client C 115 accepts the call with the client A 100, the client B 110 transmits a 200 OK message including a response to the media to be used by the client A 110 as in step 135 or 145. In response to this, the server 105 transmits a 200 OK message to the client A 100 in step 140.

One-on-one session opening is implemented by one person in the ad hoc group session opening method and procedure. Therefore, the method and procedure for establishing a one-to-one session are the same as the method and procedure for establishing an ad hoc group session.

When a predefined group session is opened, information on a predefined group is used. Accordingly, when the server 105 receives the session establishment request message for the group defined in advance from the client, the server 105 acquires the group member list, And transmits a session establishment request message to the user.

In the SIP session-based system, a messaging service based on a group member list can be provided, but a user sets a direct participation condition and a messaging service based on the condition is not supported.

Thus, conventionally, when a session opening request message is transmitted from a client to a server, a session opening operation is performed by transmitting a session opening request message to the identified members immediately after the server grasps the group members to participate. Therefore, if a SIP session-based system can open a session that reflects specific conditions set by the client, a differentiated messaging service can be provided.

Therefore, the present invention provides a system and method for establishing a session reflecting a specific condition set by a client.

In addition, the present invention provides a system and method for establishing a session when a predetermined participatable time point is satisfied in a SIP session-based messaging service environment.

A method for establishing a session when a server satisfies a specific condition for a messaging service in a server according to the present invention includes the steps of requesting a sending client to store conference information scheduled in the shared XDMS, The method comprising: transmitting a message requesting establishment of a scheduled conference session by the client to the server; acquiring the group member list and the scheduled conference information from the shared XDMS; A step of transmitting a session establishment request message to at least one receiver client corresponding to the group member list when the server satisfies the session establishment condition; Scheduled conference sessions included in session opening conditions And transmitting a message for suspending the connection of the current session to the transmitting client when the current time is longer than the predetermined waiting time.

The method comprises the steps of: generating a session establishment condition including a scheduled session establishment time, when the client terminal satisfies a specific condition for a messaging service in a client terminal of the present invention, Transmitting a message requesting to store the group member list and the session opening condition to an XML Document Management Server (OS); and transmitting the message to the client terminal as a conference session Receiving a message generated by the server at the scheduled conference session establishment time in response to a message requesting establishment of the scheduled conference session, A session with the receiving client terminal And a step of receiving a message for suspending a current session from the server when the remaining time of the scheduled conference session establishment time included in the session establishment condition is longer than a predetermined waiting time, .

The server for opening a session when a specific condition is satisfied for the messaging service of the present invention receives a message requesting establishment of a conference session, and when a condition for establishing a session established by the sending client is satisfied, Receiving a message requesting opening of the conference session, and receiving the group member list and the scheduled conference information when the message requesting opening of the conference session is received, And transmits the session establishment request message to the at least one receiving client corresponding to the group member list when the session establishment condition is satisfied, And the scheduled And a controller for controlling the transceiver to transmit a message for suspending a current session to the transmitting client when the remaining time of the conference session opening time is longer than a predetermined waiting time.

In addition, in the client terminal for establishing a session when a specific condition is satisfied for the messaging service of the present invention, the client terminal generates a session establishment condition including a scheduled session establishment time, requests to store the group member list and the session establishment condition Generates a message requesting the server to open a scheduled conference session to confirm that the current time is the scheduled conference session establishment time, and responds to a message requesting establishment of the scheduled conference session A control unit configured to open a session with at least one receiving client terminal upon receipt of a message generated by the server at the scheduled session opening time, and a controller configured to send a message requesting to store the group member list and the session opening condition Shared XDMS (XML Document Management S the server transmits a message requesting establishment of the scheduled conference session to a server, and transmits the message to the server in response to a message requesting establishment of the scheduled conference session, And a transceiver for receiving a message for suspending a current session from the server when the remaining time of the scheduled conference session establishment time is longer than a predetermined waiting time.

According to the present invention, a session can be established when a specific condition is satisfied in a SIP service based messaging service environment, that is, SIMPLE IM (Instant Messaging), PoC (Push to talk over Cellular), CPM According to the present invention, by setting a specific condition directly on the client, a messaging service that directly reflects the user's taste can be provided, which is advantageous in that a more effective messaging service can be provided.

1 is a message flow diagram for providing a conventional group messaging service,
2 is a system configuration diagram for providing a group messaging service according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a session establishment process for a predefined group according to the first embodiment of the present invention. FIG.
FIG. 4 is a flowchart illustrating a session establishment process for a predefined group according to another embodiment of FIG. 3. FIG.
FIG. 5 is a flowchart illustrating a session establishment process for an ad hoc group according to a second embodiment of the present invention;
FIG. 6 is a flowchart illustrating a session establishment process for an ad hoc group according to another embodiment of FIG. 5. FIG.
FIG. 7 is a flowchart illustrating a process of establishing a scheduled conference session in the case of a predefined group using the REFER message according to the third embodiment of the present invention; FIG.
FIG. 8 is a flowchart illustrating a process of opening a scheduled conference session in the case of an ad hoc group using the REFER message according to the third embodiment of the present invention. FIG.
9 is a diagram illustrating an HTTP PUT command used in the present invention,
Figure 10 illustrates an INVITE message for a predefined group according to the present invention,
11 is a view illustrating an INVITE message in the case of an ad hoc group according to the present invention,
12 is a diagram illustrating a REFER message in the case of a predefined group according to the present invention,
13 is a diagram illustrating a REFER message in the case of an ad hoc group according to the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The present invention proposes a method and a procedure for establishing a session when a specific condition is satisfied in a messaging service system such as SIMPLE IM (Instant Messaging), PoC (Push to talk over Cellular), CPM (Converged IP Messaging) To this end, the present invention divides a pre-defined group, an ad-hoc group, and a one-to-one case into a plurality of groups, and provides the client with a specific condition. And establishing a session with the member if satisfied. By doing so, it is possible to provide a differentiated messaging service by opening a session reflecting a specific condition set by the client in the SIP session-based system.

Prior to describing the present invention, it is assumed that SIP (Session Initiation Protocol) and SIP using a SIP application server (hereinafter referred to as a server) and a SIP application client (hereinafter referred to as a client) Based on the understanding of a session-based messaging service environment, a background description about a method of generating a one-to-one session, an ad hoc group session, and a predefined group session in a SIP session-based messaging service will be described below. same.

For this, operation of a system for providing a component of a SIP session-based messaging service system and a group messaging service based thereon according to an embodiment of the present invention will be described with reference to FIG.

Referring to FIG. 2, the clients A, B, and C (200, 230, and 240) make a user connectable to a messaging service and create / modify a SIP session. If the client A 200 wishes to establish an ad hoc group session, it transmits a conference factory URI and a group member list to the server 220 in the session establishment request message, Open.

If the client A 200 desires to establish a predefined group session, the client A 200 transmits a group URI to the server 220 in the session establishment request message, A group member list corresponding to the group URI and a group policy are obtained from the Shared XDMS (XML Document Management Server) 210 to establish a session. In the present invention, a SIP INVITE message is used as a session establishment request message.

In the above description, the contents of a client establishing a messaging session have been briefly described. In the SIP session-based system, a messaging service based on a group member list can be provided. However, in order to establish a direct participation condition and open a session when the user satisfies the conditions, the present invention proposes the following method . What is proposed in the present invention is a method and procedure for opening a session when a certain condition is met, but for clarity, the method and procedure for establishing a session when meeting a specific time and / or presence condition is described in detail. Specifically, in the present invention, specific time information and presence information such as reservation time, meeting time, anniversary, and the like set by the user are described as an example of a specific condition. However, the present invention is not limited to this and includes various various conditions such as media capability Of course.

Therefore, in order to open a session when an ad hoc group session is satisfied, a specific condition set by the user is additionally inserted into the session establishment request message transmitted to the server 220 according to the embodiment of the present invention. The server 220 analyzes the received session establishment request message to determine whether a specific condition is satisfied, and if satisfied, opens a session with the group members.

In addition, in the case of a predefined group session, the client A 200 prepares a specific condition in the form of an XML document using an XML document composer in advance, and transmits it to the shared XDMS 210 using an XCAP PUT command do. Thus, the client A 200 requests the shared XDMS 210 to store the specific condition, and the shared XDMS 210 stores the specific condition. Then, the client A 200 transmits the session establishment request message to the server 220 including the parameter for requesting the scheduled conference. Accordingly, the server 220 recognizes the request, acquires the group information and the specific condition from the shared XDMS 210, and opens a session with the group member when the specific condition is satisfied.

The SIP / IP core network 225 performs routing between the client and the server to support the messaging service. Thus, when a client registers its registration with SIP / IP to use the messaging service, the SIP / IP core network 225 stores information about the client based on the request of the client. A more detailed description can be found in IETF RFC 3261 SIP.

The server 220 performs a function of maintaining and managing a SIP session for transmitting a message between a sending client and a receiving client, and a function of performing session creation / maintenance / termination of one client. In general, a conference function or a controlling function is performed for a server which maintains a group session in which a plurality of clients participate, and a function of managing a session of one client is participated Is called a participating function.

The function of the Shared XDMS (XML Document Management Server) 210 is a kind of Address Book. In the embodiment of the present invention, the shared XDMS 210 is a kind of group management server. The shared XDMS 210 stores a document created in XML such as contents of a predefined group, a contact list, a user access policy, a user profile, and the like. The predefined group document contains a unique URI and member list that can identify the group, an authorization mechanism for the user to obtain the group information, and a group policy. Particularly, according to the embodiment of the present invention, scheduled group information is additionally created in the predefined group document as a specific condition of session establishment. For example, the group information may include specific time, presence information on / off state, and the like.

 Embodiments of the present invention described in the following detailed description of the present invention will be described as follows. The first embodiment of the present invention describes the case of a predefined group and transmits the scheduled conference information indicating a specific condition for opening a desired session to the shared XDMS by the client, The server receives the group member list and the schedule conference information from the shared XDMS, and when the server satisfies the specific condition corresponding to the schedule conference information, And a session of opening a session. In the second embodiment of the present invention, an ad hoc group is described. When a client transmits a session establishment request message including a specific condition to a server, the server receives the group establishment request message and obtains a group member list and a specific condition, And establishing a session with the members when the specific condition is satisfied. In the third embodiment of the present invention, a case where a REFER message is used instead of a session establishment request message in a state where a session is not connected will be described.

First, in the case of a predefined group corresponding to the first embodiment of the present invention, a session establishment process will be described with reference to FIG.

Referring to FIG. 3, a shared XDMS 210 is used for a predefined group session. The shared XDMS 210 stores information on a predefined group and specific conditions for establishing a session in advance. In order to provide this information to the shared XDMS 210 in advance, the client A 200 transmits the HTTP PUT to the shared XDMS 210 in operation 300. Specifically, the client A 200 creates an XML document by using an XML document creator to create a condition, for example, a specific time and / or presence information, which the client A 200 wants to establish a session with, and then transmits the XML document to the shared XDMS 210 using an XCAP PUT command. .

The generated HTTP PUT command is as shown in FIG. The XML document of FIG. 9 includes a group URI 900 and conference information 910 scheduled as one of the elements. Here, the scheduled conference information 910 indicates a specific condition for establishing a session, and the specific conditions include a session opening reservation time, presence information indicating on / off of the other party, and the like. 9 shows an example of creation of the session establishment reserved time portion 920 and the presence information portion 930. [ The session establishment reservation time can be specified as "GMT 2008-10-10 12:30:00" as indicated by reference numeral 920, and when the reservation information is to be inserted as another condition, A portion as indicated by reference numeral 930 can be additionally created. At this time, a lower element should be described in detail so that a session can be opened according to the state of presence. In the reserved time portion 920 of FIG. 9, "clock" is used as the lower element and the time is displayed as "GMT 2008-10-10 12:30:00". In the case of describing the presence information part 930, this part 930 indicates that the member "sip: bob@example.com" among the members corresponding to the group URI 900 is in an on state, that is, "true" It means a condition to open a session.

Upon receiving the HTTP PUT command, the shared XDMS 210 stores the scheduled conference information in step 305, and transmits a 200 OK message to notify the client A 200 that it has successfully stored the conference information in step 310.

In step 315, the client A 200 transmits an INVITE message, which is a session establishment request message, to the server 220. The INVITE message includes a group URI and a parameter requesting a scheduled conference, which is a factor for requesting establishment of a reservation session. An example of this INVITE message is shown in FIG. Referring to the Require header 10 of the INVITE message in FIG. 10, "Require: schduled-conf-apply" means that the server 220 must support the scheduled conference to create a session. In the contact header 20, the "schduled-conf" parameter means that the client A 200 requests a scheduled conference session to be established.

In step 320, the server 220 receives the INVITE message and transmits a 183 Session progress message to the client A 200 indicating that it will proceed to the next reservation session. At this time, if there is no "scheduled-conf-apply" parameter in the received INVITE message or "scheduled-conf-apply" in the Require header, the server 220 ignores the scheduled conference information in the predefined group information, To the predefined group participants on the receiving side.

If the INVITE message having the above-mentioned request is received, the server 220 acquires the scheduled conference information together with the group member list from the shared XDMS 210. In step 325, the server 220 transmits an HTTP GET command, which is an XCAP GET command, to the shared XDMS 210. When the server 220 requests the shared XDMS 210 using the HTTP GET command, the server 220 receives the 200 OK message in step 330. Then, the server 220 obtains group information corresponding to the group URI, for example, a group member list, a group policy, and scheduled conference information from the 200 OK message received in step 335.

In order to perform the task requested by the "scheduled-conf" parameter in the received INVITE message, the server 220 transmits time information and / or time information based on the scheduled conference information acquired from the shared XDMS 210 in step 340 Check the information. Accordingly, when the checked time and / or the checked presence information is satisfied, the server 220 transmits an INVITE message to the predefined group participants on the receiving side in order to open a session. Accordingly, as in steps 345 and 350, the INVITE message is transmitted to the client B 230 and the client C 240. In response to this, the server 220 receives the 200 OK message sent from the receiving side participants in steps 355 and 365. When receiving the first 200 OK message, the server 220 transmits the 200 OK message to the client A 200, 200 OK response message.

However, if the client A 200 has to wait for a long time until the reservation time, the client A 200 may temporarily hold the session establishment dialog state It is preferable that all the clients open a session again at the reservation time. Accordingly, the present invention proposes a process for determining whether the reservation time is after a predetermined time as shown in FIG. 4, steps 400 to 435 are the same as those in steps 300 to 335 in FIG. 3, and thus a detailed description thereof will be omitted. 4, when the server 220 obtains the scheduled conference information, it determines in step 440 whether the reserved time is later than a predetermined waiting time. If it is determined that the reservation time after the waiting time is longer than the reserved time, the server 220 transmits a Not Accepted message to the client A 200 in step 445. The Not Accepted message is used to notify the user that the user should wait until the reservation time, and to terminate the current session establishment dialog state.

Then, the server 220 checks the time in step 450 and transmits an INVITE message to the clients 200, 230, and 240 in the group member list in steps 455, 470, and 475 when the reservation time comes. In step 460, step 475 and step 485, the server 220 establishes a session by receiving each 200 OK message in response to the transmission of the INVITE message.

In the meantime, in the case of the ad hoc group according to the second embodiment of the present invention, a session opening process will be described with reference to FIG. One-to-one session opening can be implemented by making a single attendance request in the method and procedure for setting up an ad hoc group session. Therefore, the method and procedure for establishing a one-to-one session are the same as the method and procedure for establishing an ad hoc group session, and an ad hoc group will be described below as an example. The second embodiment of the present invention mainly comprises a process of transmitting a group member list and a scheduled conference information to a server in a session opening request message, And transmitting a session establishment request message to the group members when the specific condition is satisfied.

Specifically, the client A 200 transmits to the server 220 a list of participants to invite to the session in the INVITE message, that is, a group member list, and scheduled conference information indicating a specific condition. An example of such an INVITE message is shown in FIG. Referring to FIG. 11, a conference factory URI is inserted into a request URI to indicate that the session is a scheduled conference session to be opened. The related SIP headers and the resource list content type have already been described above. So here we describe the parameters of the Require and Contact headers and the new Content-Type. The "scheduled-conf-apply" of the Require header and the "scheduled-conf" parameter of the Contact header are the same as those described in the first embodiment of the present invention using the shared XDMS 210.

However, in the second embodiment of the present invention, the INVITE message may include the additionally scheduled conference information part 11 as shown in FIG. "Content-Type: application / scheduled-conf-condition + xml" in this part 11 is written in XML form to provide a reservation time. In this scheduled conference information part 11, only the reservation time indicating the trigger type as "time" is described. However, as shown in FIG. 9, the reservation information can be added after the reservation time, Of course, can be added. In other words, a session can be opened according to the state of the presence by indicating the trigger type as "presence".

11, the server 220 understands the meaning of "scheduled-conf-apply" of the Require header and the "scheduled-conf" request of the Contact header, and in step 505, And transmits the 183 Session Progress message to the client A 200, which means that it is going to be opened. Server 220 obtains the scheduled conference information from the INVITE message in step 510 to perform the requested operation by the "scheduled-conf" parameter in the received INVITE message Contact header. Then, in step 512, the server 220 checks the reservation time of the acquired information. If the reservation time comes, the INVITE message is transmitted to the receiving side participants in the group member list, for example, the client B 230 and the client C 240, respectively. Then, the server 220 receives the 200 OK message in steps 525 and 535, and transmits the 200 OK message to the client A 200 in step 530. At this time, when the server 220 receives the first 200 OK message sent by the receiving side participants, it sends a 200 OK response message to the client A 200 requesting the establishment of the scheduled conference session.

In the case of such an ad hoc group session, if it is necessary to wait a long time until the reservation time, it is preferable that all the clients open a session again at the reservation time after the client A 200 once ends the session. Therefore, in consideration of this, refer to FIG. 6 to see how the reservation time operates after a predetermined waiting time. 6, steps 600 to 610 are the same as those in steps 500 to 510 in FIG. 5, and a detailed description thereof will be omitted.

6, the server 220 determines in step 612 whether the reserved time is later than a predetermined waiting time. As a result of the determination, if it is necessary to wait a long time until the reservation time, the server 220 transmits a Not Accepted message to the client A 200 in step 615. The operations in steps 625 to 650, such as transmitting the Not Accepted message, are the same as those in steps 445 to 485 of FIG. 4, and thus a detailed description thereof will be omitted.

In the first and second embodiments of the present invention, the client A 200 uses the INVITE message as an example of the session establishment request, but the REFER message may also be used. When the REFER message is used, the client A 200 does not need to continuously maintain the session establishment dialog state until the actual scheduled conference session is established. A process of establishing a scheduled conference session using the REFER message will be described with reference to FIG. Such a REFER message may be used in a predefined group session, a one-to-one session, or an ad hoc group session, respectively. FIG. 7 illustrates a case where a REFER message is used in a predefined group session.

Referring to FIG. 7, in steps 700 to 710 of FIG. 7, the client A 200 delivers conference information scheduled to the shared XDMS 210 using an HTTP PUT command, and the shared XDMS 210 transmits the information The storing operation is the same as the operation in steps 300 to 310 in FIG. However, in FIG. 7, the client A 200 generates a REFER message including a group URI and a scheduled conference parameter, and transmits the REFER message to the server 220. This scheduled conference parameter serves to inform that the REFER message is a message requesting a scheduled conference.

An example of such a REFER message is shown in FIG. Referring to FIG. 12, the INVITE message is the same as the INVITE message of FIG. 10 except that a REFER-To header 12 and an Event header 22 are added. The Request URI value in the REFER message shall include the SIP URI of the subject receiving the REFER message and the REFER-To (12) shall contain the URI of the subject to receive the INVITE message. In the embodiment of the present invention, the target which should receive the REFER message is a SIP application server that needs to open a group conference session called "Mygroup ", so the group URI of" mygroup@example.com " The REFER-To 12 indicates that the target to receive the actual INVITE message is the participants in the member list in the "mygroup@example.com" group. The parameters of the Require header 32 and the Contact header 42 have the same meaning as described above. The meaning of "refer" in the Event header 22 means that the server 220 sends a Notify message to the sender of the REFER message when receiving the response sent by the receiver participants to the INVITE message.

Therefore, the server 220 receiving the REFER message transmits the 202 Accepted message in step 720 in response to the REFER message. This 202 Accepted message serves to report that a scheduled conference session is in progress. Accordingly, after receiving the 202 Accepted message, the client A 200 recognizes that the session will proceed and maintains the current state until receiving the INVITE message from the server 220.

On the other hand, the server 220 performs steps 725 to 735 for obtaining the scheduled conference information, which is the same as steps 425 to 435 of FIG. When the server 220 obtains the scheduled conference information, the server 220 checks the time based on the obtained conference information in step 740 and determines whether the reservation time comes. Accordingly, when the reservation time comes, the server 220 transmits the INVITE message to the clients 230 and 240 corresponding to the group member list as in steps 745 through 755. At this time, the server 220 should inform the client A 200 to participate in the session. For this, the server 220 refers to the From header of the REFER message and transmits the INVITE message to the client A 200 as in step 745.

Upon receiving the INVITE message, the client A 200 transmits a 200 OK message to the server 220 in response to the INVITE message, thereby participating in the establishment of the scheduled conference session. At this time, when the server 220 receives the 200 OK message from the client B 230 in step 765, the 200 OK message is accepted as meaning that the client B 230 participates in the scheduled conference. Accordingly, the server 220 transmits a NOTIFY message to the client A 200 in step 775, thereby indicating that the client B 230 has participated in the session. Similarly, when the server 220 receives the 200 OK message from the client C 240 in step 770, the server 220 informs the client C 240 of the participation of the session by transmitting a NOTIFY message to the client A 200. Upon receiving these NOTIFY messages, the client A 200 transmits a 200 OK message to the server 220 to notify the server 220 that the NOTIFY message has been successfully received, as in steps 780 and 790.

Meanwhile, FIG. 8 illustrates a case where a REFER message is used in an ad hoc group session. Referring to FIG. 8, in step 800, the client A 200 transmits a REFER message to provide the conference information scheduled to the server 220. An example of such a REFER message is shown in FIG. 13, the scheduled conference information along with the group member list may be inserted into the REFER message transmitted to the server 220, as indicated by reference numeral 13. Upon receipt of the REFER message, the server 220 transmits a 202 Accepted message to the client A 200 in step 805. Steps 805 to 860 are the same as those in steps 735 to 790 of FIG. However, in step 815, the server 220 may transmit the INVITE message to the client A 200 by referring to the From header of the REFER message. Alternatively, the resource list of the REFER message may include the URI of the client A 200, It is possible to transmit the INVITE message to the client A 200.

According to the present invention as described above, a specific condition is provided to the server 220 in order to open a scheduled conference session, so that a user can directly set a desired condition and open a conference session reflecting the desired condition.

100: Client A 105: SIP Application Server
110: client B 115: client C
200: Client A 210: Shared XDMS
220: SIP application server 225: SIP / IP core network
230: Client B 240: Client C

Claims (15)

A method for opening a session when a server meets a specific condition for a messaging service,
Receiving, by the server, a message requesting establishment of a scheduled conference session from a sending-side client;
Obtaining a group member list and scheduled conference information by the server;
Confirming whether the server satisfies a session establishment condition set by the transmission-side client based on the acquired information;
Transmitting a session establishment request message to at least one receiver client corresponding to the group member list when the server satisfies the session establishment condition;
And transmitting, by the server, a message for suspending connection of the current session to the transmitting client when the remaining time of the scheduled conference session opening time included in the session opening condition is longer than a predetermined waiting time A method for opening a session when a specific condition is satisfied. The method of claim 1,
And the scheduled session establishment time and the presence information indicating a scheduled time for establishing a session, when the predetermined condition is satisfied. 2. The method of claim 1, wherein the message requesting establishment of the scheduled conference session is an INVITE message or a REFER message, and includes a parameter indicating that the scheduled conference is a scheduled conference. 4. The method of claim 3, wherein when the message requesting establishment of the scheduled conference session is the REFER message,
The server may further include a step of transmitting the session establishment request message to the transmission side client when the scheduled conference session establishment time is reached after suspending connection of the current session satisfying the session establishment condition A method for opening a session when a specific condition is satisfied. The method as claimed in claim 1,
And acquiring the group member list and the scheduled conference information from a shared XML Document Management Server (XDMS). The method as claimed in claim 1,
And obtaining the group member list and the scheduled conference information from a message requesting the establishment of the scheduled conference session. A method for establishing a session when a client terminal satisfies a specific condition for a messaging service, the method comprising:
Generating a session opening condition including the scheduled session opening time;
Transmitting a group member list and a message requesting to store the session opening condition to a shared XML Document Management Server (XDMS)
Transmitting a message to the server requesting establishment of a scheduled conference session so that the client terminal confirms whether the current time is the scheduled session establishment time;
Establishing a session with at least one receiving client terminal by receiving a message generated by the server at the scheduled conference session opening time corresponding to a message requesting opening of the scheduled conference session;
Receiving a message for suspending a current session from the server when the remaining time of the scheduled conference session establishment time included in the session establishment condition is longer than a predetermined waiting time; A method for opening a session when satisfied. The method of claim 7,
And the scheduled session establishment time and the presence information indicating a scheduled time for establishing a session, when the predetermined condition is satisfied. 8. The method of claim 7, wherein the message requesting to store the group member list and the session opening condition in the shared XDMS is an XCAP PUT command. 9. The method according to claim 8, wherein the group member list and the session establishment condition include:
Wherein the server is obtained from the shared XDMS by the server. The method as claimed in claim 10, wherein when the session establishment condition is satisfied, a session establishment request message is transmitted to the at least one reception client terminal corresponding to the group member list. Way. 10. The method of claim 9, wherein the message requesting establishment of the scheduled conference session comprises:
An INVITE message or a REFER message, and includes a parameter indicating a scheduled conference. 13. The method of claim 12,
The server determines whether the INVITE message or the REFER message contains a parameter indicating the scheduled conference. If the INVITE message or the REFER message contains a parameter indicating the scheduled conference, the server transmits an XCAP GET command requesting the scheduled conference information To the shared XDMS when the specific condition is satisfied. A server for opening a session when a specific condition for a messaging service is satisfied,
Receiving a message requesting establishment of a conference session and transmitting a session establishment request message to one or more reception clients corresponding to a group member list when a condition for establishing a session established by a transmission-side client is satisfied;
Acquiring the group member list and the scheduled conference information upon receipt of a message requesting opening of the conference session, checking whether the server satisfies the session opening condition set by the transmitting-side client based on the obtained information, The control unit controls the transceiver to transmit a session establishment request message to one or more reception clients corresponding to the group member list when the session establishment condition is satisfied, and when the remaining time of the scheduled conference session establishment time is longer than a predetermined waiting time And a controller for controlling the transceiver to transmit a message for suspending a current session to the transmitting client. A client terminal for establishing a session when a specific condition is satisfied for a messaging service,
Creates a session opening condition including a scheduled session opening time, generates a message requesting to save the group member list and the session opening condition, and confirms whether the current time is the scheduled conference session opening time Generating a message requesting the opening of a scheduled conference session, receiving a message generated by the server at the scheduled session opening time corresponding to a message requesting opening of the scheduled conference session, A control unit for controlling to open a session with the terminal,
Transmitting a message requesting to store the group member list and the session establishment condition to a shared XML Document Management Server (XDMS), transmitting a message requesting establishment of the scheduled conference session to a server, and transmitting the scheduled conference session Receives a message generated by the server at the scheduled conference session establishment time in response to a message requesting establishment of the scheduled conference session establishment time and if the remaining time of the scheduled conference session establishment time is longer than a predetermined standby time, And a sending / receiving unit for receiving a message for suspending a current session.

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