KR100640512B1 - Method and system for synchronizing data between server and terminal using messenger service system - Google Patents

Abstract

The present invention provides a method and system for synchronizing data between a server and a user terminal using a messenger service system. The present invention provides a data synchronization system including a messenger server for storing at least one contact list having information of members belonging to one messenger group, and a synchronization server for synchronizing information of user terminals. A method for synchronizing data with the user terminals by the synchronization server, the method comprising: storing the information data when there is an information data synchronization request for sharing among the groups from any one of the user terminals; Requesting a contact list of the other user terminal from the messenger server when a data synchronization request is received from another user terminal among the user terminals, and if the contact list is received, the other user terminal transmits the one user terminal. If belonging to the group of characterized in that it comprises the step of synchronizing with the information data.

Messenger service, data synchronization.

Description

Method for synchronizing data between server and user terminal using messenger service system and system therefor {METHOD AND SYSTEM FOR SYNCHRONIZING DATA BETWEEN SERVER AND TERMINAL USING MESSENGER SERVICE SYSTEM}             

1 is a system configuration diagram for performing data synchronization between a conventional terminal and a SyncML server;

2 is a signal flow diagram illustrating a process of synchronizing presence information data between a conventional terminal and a messenger server;

3 is a system configuration diagram for performing a data synchronization process according to information generation and modification of a terminal according to an embodiment of the present invention;

4 is a signal flow diagram for performing a data synchronization process with a synchronization (SyncML) server according to information generation and change of a terminal according to an embodiment of the present invention;

5 is a signal flow diagram for performing a data synchronization procedure between a terminal and a server according to an embodiment of the present invention;

6 is a signal flow diagram for performing a synchronization procedure when selecting a target terminal to provide sharing information according to an embodiment of the present invention in a SyncML server;

7 is a signal flow diagram for performing a synchronization procedure when selecting a target terminal to provide sharing information according to an embodiment of the present invention in a messenger server;

8 is a diagram illustrating a data format for storing data generated and changed by a terminal in a SyncML server according to an embodiment of the present invention;

9 is a diagram illustrating a contact list according to an embodiment of the present invention;

10 is a diagram illustrating a configuration of a contact list according to an embodiment of the present invention.

The present invention relates to a data synchronization method and a system thereof, and more particularly, to a data synchronization method and a method for controlling the system between a server and a user terminal using a messenger service system.

With the development of the wireless Internet, it is becoming common to search the Internet through a mobile data terminal or to access an information provider server to use a data service. As a result, the use of mobile data terminals, such as managing their work schedules or exchanging e-mails using personal information manager software, is becoming a new means of business as well as personal use. In addition, as the wireless mobile communication environment is diversified, the types of mobile terminals provided by each vendor are diversified, and the number of terminals possessed by each individual is increasing. The most recent value matching, or data synchronization, should be made for the same data distributed across multiple terminals, and the synchronization protocol used for this is currently used by personal data assistant (PDA) controllers and service providers. Each develops and uses its own method. The purpose of data synchronization is to match common data in various wired / wireless terminals to each other. SyncML (Synchronization Markup Language) is a standard language that performs data synchronization regardless of different types of terminals and services under an arbitrary network environment. The SyncML synchronization protocol defines how SyncML messages are exchanged to add, delete, and change data between the SyncML server and the SyncML terminal, how they operate for actual synchronization, and the type of synchronization.

Referring to FIG. 1, data synchronization is performed between a mobile terminal that performs a typical SyncML client function (hereinafter referred to as a "SyncML terminal") and a server that performs a SyncML server function (hereinafter referred to as a "SyncML server"). It shows a system configuration for. If the SyncML terminal 100 first sends a message including the updated data to the SyncML server 102 in step 104, the SyncML server 102 synchronizes with the server-side data by the requested synchronization borrowing of the SyncML terminal 100. After the operation, in step 106, the response message is transmitted to the SyncML terminal 100.

As described above, the user of the SyncML terminal 100 generates his information in the terminal, stores it in the SyncML server 102, and synchronizes the information of the SyncML server 102 even when using multiple mobile terminals. A SyncML service has been developed that allows the use of personal information.

On the other hand, the messenger service has a presence function for sharing the current status of members registered in a contact list and a function for transmitting messages between members, thereby providing a mobile terminal such as a mobile phone, PDA, or mobile PC. Prevalence is providing the function of grouping a large number of people.

For data compatibility between the messenger terminal and the server, if there is a connection between these systems, data synchronization between each other is necessary. Referring to FIG. 2, which illustrates a system for accessing such a messenger terminal and a server, the messenger terminal 110 is a terminal device capable of providing a messenger service, and provides a messenger server 112 through an internet network or a mobile communication wireless network. You can connect with. In addition, the server 112 for providing a messenger service is provided with a presence information database so that the friend list information of the corresponding messenger terminal 110, the status information of each friend in the list, the address information of the friends, the contact information ( presence information, such as contact information, is stored. That is, the presence information herein refers to friend list information stored by the messenger terminal 10 and the messenger server 112 to perform a messenger service, status information of each friend present in the list, address information of friends, contact information ( contact) information data such as information.

The messenger terminal 110 connects to the messenger server 112, requests presence information from the server 112 to receive a messenger service, and receives the presence information from the server 112. That is, when the messenger terminal 110 receives an input for a messenger service from the user, the messenger terminal 110 transmits a server request signal (Login request) to the messenger server 112 in step 200. After receiving the messenger server 112 confirms the corresponding messenger terminal 110 requesting the connection and transmits a response signal for the access request, the user service information and the messenger terminal between the messenger terminal 110 and the messenger server 112. (110) Send / receive information. Thereafter, in step 202, the messenger terminal 110 transmits a presence information request message for requesting presence information to the messenger server 112, and the messenger server 112 receiving the presence information presents the presence information about the messenger terminal 110. The information is read from the presence information database and the presence information response message is transmitted to the messenger terminal 110 in step 204.

As described above, the messenger service is a service for sharing status information and delivering messages in groups among related persons. When there is information to be shared among the members constituting the group receiving the message service as described above, there is no method for distributing and synchronizing information such as memo or schedule to be shared through the terminal or the server. In addition, SyncML provides only a method of synchronizing simple information generated by an individual between a server and a terminal, and thus does not provide a way to share data with other users.

Accordingly, an object of the present invention is to provide a system and method for providing and synchronizing information to be shared among members of a specific group using a contact list of a messenger service.

In order to achieve the above object, the present invention provides a messenger server for storing at least one contact list having information of terminals belonging to one messenger group, and a data having a synchronization server for synchronizing the information of the terminals. In a synchronization system, the synchronization server stores the information data when a synchronization request message including information data to be shared between the group from the first terminal of the terminals, and stores the information data from the second terminal of the terminals; In response to an information data synchronization request, after receiving a contact list for the second terminal from the messenger server, if it is determined that the second terminal belongs to the group of the first terminal through the contact list, the synchronization is performed with the information data. It is characterized by.

The present invention also provides a data synchronization system including a messenger server for storing at least one contact list having information of terminals belonging to one messenger group, and a synchronization server for synchronizing the information of the terminals. A method for synchronizing data with the terminals by the synchronization server, the method comprising: storing the information data when there is an information data synchronization request for sharing between the group from a first terminal among the terminals; Requesting a contact list of the second terminal to the messenger server when there is a request for synchronizing information data from a second terminal of the second terminal; and the second terminal of the first terminal through the contact list received in response to the request. If it is determined to belong to the group, the information is synchronized And it characterized in that it comprises the step of.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention implements a function that can provide information to be shared between members within a specific group. To this end, the present invention is configured to provide a method for synchronizing data between a server and terminals using SyncML, which is a standard protocol for synchronization. Such a server is divided into a SyncML server providing information and a synchronization service to be shared, and a messenger server providing a contact list for a terminal user for classifying a group to provide shared information.

First, in an embodiment of the present invention, whenever a new sharing information is input, the SyncML server updates the synchronization database in advance for a synchronization service for sharing the generated and changed information among members in a specific group. Then, when there is a synchronization request from another terminal user, the SyncML server receives the contact list from the messenger server, authenticates the other terminal, and performs the synchronization. That is, in one embodiment of the present invention, a data synchronization procedure centered on a SyncML server is performed.

In contrast, in another embodiment of the present invention, when new information is generated in the user terminal, when a message is transmitted to the messenger server, the messenger server transmits a message indicating that the user terminal and the group belonging to the user terminal belong to the messenger server. To the SyncML server, whereby the update is performed on the SyncML server. That is, in another embodiment of the present invention, a data synchronization procedure centered on the messenger server is performed.

Next, a system for providing a synchronization service between terminals of members in order to provide information to be shared among members in a specific group will now be described with reference to FIG. 3. 3 is a diagram illustrating a system configuration for providing sharing information and performing a synchronization procedure according to an embodiment of the present invention.

First, a messenger server (a first terminal 300 and a second terminal 302, an internet network 306, a wireless network 304, and a messenger server through a network interface configured as a messenger service) is a terminal of a user subscribed to a contact list. 314 and SyncML server 310 are connected. The first terminal 300 and the second terminal 302 may be connected to the messenger server 314 and the SyncML server 310 over a wired / wireless network through the Internet.

In addition, the SyncML server 310 provides information providing and synchronization services to be shared. Examples of the information to be shared here include various information according to the characteristics of the group, such as file, note, group announcement, e-mail, schedule, vCard, and business card. have. In addition, the provision of the above information means that the information generated by the terminal user subscribed to the contact list is transferred to another terminal. In addition, synchronization means that if the information provided is modified or deleted by another terminal user, the same is reflected to the remaining clients. For this information provision and synchronization service, the messenger server 314 provides the contact list of the terminal user according to the request of the SyncML server 310, and the SyncML server 310 provides the contact list received by the messenger server 314. The user terminal must be authenticated to perform synchronization.

Here, it is assumed that the first terminal 300 of FIG. 3 is a terminal for generating and changing information to be shared, and the second terminal 302 is a terminal receiving shared information.

First, a process of synchronizing data based on a SyncML server according to an embodiment of the present invention will be described. If the first terminal 300 has an input for synchronization request with the SyncML server 310 and information to be shared by the subscriber, the first terminal 300 synchronizes with the SyncML server 310 using the SyncML protocol. Then, when the second terminal 302 synchronizes with the SyncML server 310, the SyncML server 310 requests a contact list from the messenger server 314 to identify a group to provide sharing information. That is, the SyncML server 310 provides the second terminal 302 with information to share after authenticating whether the second terminal 302 has joined the group through the messenger server 314.

Then, the user terminal (300, 302) and SyncML server 310 to provide a synchronization service between the terminal of the member in order to provide information to be shared between members within a specific group in the system configured as shown in FIG. The operation flow between the messenger server 314 will be described. 4 is a signal flow diagram for performing a synchronization process with a synchronization (SyncML) server according to information generation and change of a terminal according to an embodiment of the present invention.

Referring to FIG. 4, if there is an input for sharing information and synchronization with the SyncML server 310 in step 400, the first terminal 300 requests a synchronization using the SyncML protocol to the SyncML server 310 in step 402. Send a message. At this time, the message for requesting synchronization includes information generated and changed.

Thereafter, when the SyncML server 310 receives the synchronization request message from the first terminal 300, the SyncML server 310 performs an authentication process for the terminal that transmitted the message in step 404, and proceeds to step 406. In step 406, the SyncML server 310 performs synchronization with the first terminal 300, and proceeds to step 408 to update the synchronization database. That is, the SyncML server 310 stores the generated and changed information data in the synchronization database 312. At this time, the structure stored in the synchronization database is shown in FIG. 6 is a diagram illustrating a data format for storing data generated and changed by a terminal in a SyncML server according to an embodiment of the present invention. That is, information data ID, user ID, and user data to be shared are stored.

Then, after performing the synchronization process with the SyncML server 310 with the information to be shared with the group members by the first terminal 300 as shown in FIG. 4, when the group members perform the synchronization process with the SyncML server 310 SyncML A process in which the server 310 provides information generated and changed by the first terminal 300 will be described with reference to FIG. 5. 5 is a signal flow diagram for performing an information synchronization procedure according to the information change of the terminal according to an embodiment of the present invention.

First, the second terminal 302 transmits a synchronization request message to the SyncML server 310 in step 500. The SyncML server 310 receiving this performs an authentication process for the terminal. Thereafter, the second terminal user requests the contact list of the messenger server 314. Upon receiving the contact list request message, the messenger server 314 performs the authentication process of the SyncML server 310 in step 506 and then reads the corresponding contact list in step 508. Thereafter, the read contact list is transmitted to the SyncML server 310 in step 500. That is, the SyncML server 310 requests a contact list from the messenger server 314 to identify a group to provide the information generated or changed by the first terminal 300. In this case, the contact list for the user terminal may be illustrated in FIG. 9. That is, the contact list classifies a group to provide shared information that is generated or changed information.

Upon receiving this, the SyncML server 310 reads the user's information data of the contact list received in step 512, performs synchronization in step 514, and transmits a synchronization response message to the second terminal 302 in step 516. After reading each user information data included in the contact list, data synchronization is performed with the read information. The structure of such a contact list may be illustrated in FIG. 10.

As described above, in the present invention, when one user of the group synchronizes with the information to be shared between the SyncML server 310 and the members of the group, another user terminal requests the synchronization to the SyncML server 310. The SyncML server 310 may provide information to be shared after authenticating whether the user joins the group through the messenger server 314.

Next, a process of performing data synchronization centered on a messenger server according to another embodiment of the present invention will be described. According to another embodiment of the present invention, a synchronization method for a case in which a synchronization notification function is implemented on a SyncML server side and a case in which a synchronization notification function is not implemented is disclosed.

In the following description, a synchronization method when the synchronization notification function is implemented is divided into two cases as illustrated in FIGS. 6 and 7.

First, a synchronization procedure when a messenger server provides a contact list to a SyncML server will be described with reference to FIG. 6. 6 is a signal flow diagram for performing a synchronization procedure when selecting a target terminal to provide sharing information according to an embodiment of the present invention in a SyncML server.

As shown in FIG. 6, when new sharing information is input from the user in step 600, that is, information to be shared among members in a specific group is generated, the first terminal 300 shares information to the messenger server 314 in step 605. Send a message indicating the need for an update.

Then, the messenger server 314 reads the contact list of the terminal 300 which requested the update in response to the message reception and the group in which the terminal 300 is registered in step 610. Then, the read information of the first terminal 300 and the contact list for the terminal 300 are transmitted to the SyncML server 310. On the other hand, since the function to notify the synchronization of the first terminal 100 to the SyncML server 310 that has received this is implemented, the SyncML server 310 requests the synchronization for the first terminal 300 in step (620) In other words, a message informing of synchronization is generated and the synchronization notification message generated in operation 625 is transmitted to the first terminal 300.

Then, as in step 635, the SyncML protocol is applied between the first terminal 300 and the SyncML server 310, so that the first terminal 300 and the SyncML server 310 are performed in steps 630 and 640, respectively. Perform synchronization. In other words, the SyncML server 310 performs synchronization after performing an authentication process for the first terminal 300. Here, the synchronization using the SyncML protocol is performed in step 635 by transmitting the information generated and changed in the first terminal 300 to the SyncML server 310.

Thereafter, the SyncML server 310 proceeds to step 645 after synchronizing the first terminal 300 to update the sharing information. That is, the SyncML server 310 stores the generated and changed information in the synchronization database, thereby updating the synchronization database. Here, the structure in which the shared information is stored in the synchronization database is as shown in FIG.

Then, the SyncML server 310 reads the user information using the contact list provided from the messenger server 314 in step 650. That is, the SyncML server 310 classifies a group to provide sharing information by using a contact list to transmit the sharing information to the first terminal 300 and members belonging to a group. According to the divided result, the SyncML server 310 requests a synchronization for the second terminal 302, which is the target of providing the shared information, in step 655, and generates a synchronization notification message informing that there is an updated shared information. do. Then, the SyncML server 310 proceeds to step 660 and transmits the generated synchronization notification message to the second terminal 302.

Then, as in step 670, the SyncML protocol is applied between the second terminal 302 and the SyncML server 310, so that the SyncML server 310 and the second terminal 302 are performed in steps 665 and 675, respectively. After the synchronization is performed, the second terminal 302 proceeds to step 680 to update the sharing information.

As described above, when the synchronization notification function is implemented in the SyncML server 310, when one of the members of the group sends a message informing the messenger server 314 of the necessity of updating the shared information, the SyncML server 310 sends a message. The process of synchronizing with other terminals of the group by receiving the contact list from the messenger server 314 and synchronizing with the user terminal and informing the members of the group has been described.

In the following description, a synchronization procedure in the case where a messenger server selects a target for providing shared information and provides it to a SyncML server will be described with reference to FIG. 7. 7 is a signal flow diagram for performing a synchronization procedure when selecting a target terminal to provide sharing information according to an embodiment of the present invention in a messenger server.

 First, when a new shared data is input from the user in step 700, the first terminal 300 proceeds to step 705 and transmits an update message to the messenger server 314 indicating that the sharing information is required. The messenger server 314 then reads the contact list for the first terminal 300 and requests the SyncML server 310 to update the shared database in step 710. Accordingly, the messenger server 314 transmits the information about the first terminal 300 to the SyncML server 310 in step 715.

Meanwhile, the SyncML server 310 requests synchronization with the first terminal 300 in step 720 by using the information received from the messenger server 314. Accordingly, the SyncML server 310 generates a synchronization notification message requesting synchronization and transmits it to the first terminal 300 in step 725. Then, the SyncML protocol 735 is applied between the SyncML server 310 and the first terminal 300 to perform synchronization corresponding to steps 730 and 740.

Thereafter, the SyncML server 310 notifies the messenger server 314 of completion of synchronization at step 745 and proceeds to step 755 to update the shared information, that is, the shared database. On the other hand, when the messenger server 314 recognizes that the synchronization is completed, the messenger server 314 reads the contact list for the first terminal 300 in step 750 and selects an update target terminal according to the contact list. That is, the messenger server 314 classifies a group to provide the information generated or changed by the first terminal 300. Accordingly, when the target terminal is selected, for example, when the target terminal is the second terminal 302, the messenger server 314 transmits the information about the second terminal 302 to the SyncML server 310 in step 760. send.

Then, the SyncML server 310 generates a synchronization notification message while requesting synchronization with the second terminal 302 in step 765 and transmits it to the second terminal 302 in step 770. Accordingly, the SyncML server 310 performs synchronization by providing information to be shared to the second terminal 302 in step 775. After receiving the message, the second terminal 302 performs synchronization in step 785 by using the SyncML server 310 and SyncML protocol 780, and then proceeds to step 799 to update sharing information. Meanwhile, the SyncML server 310 notifies the messenger server 314 as shown in step 790 that the synchronization is completed when the synchronization is completed.

Accordingly, the messenger server 314 selects an update target terminal according to the contact list again as described above in step 795 so that synchronization with other terminals can be performed, thereby allowing the same information among members on the contact list. To share.

As described above, when the synchronization notification function is implemented in the SyncML server 310, the messenger server 314 selects a target terminal to provide the shared information and provides the information to the SyncML server 310 so as to provide group information. Synchronization between them was possible.

In contrast, the following describes a process of performing a synchronization procedure when a synchronization notification function is not implemented in the SyncML server 310 according to another embodiment of the present invention.

If the synchronization notification function is not implemented in the SyncML server 310, the messenger server 314 directly transmits a message indicating that there is information to be shared to each terminal of each member registered in the contact list. That is, when the SyncML server 310 does not support providing the shared information using the contact list, the messenger server 314 notifies each terminal of the members of the group that the shared information has been updated.

As such, when the messenger server 314 transmits a message to the group member terminals informing the SyncML server 310 of the information generated and changed by any terminal in the group, that is, information to be shared, the member terminals are connected to the group. By synchronizing with the SyncML server 310, it is possible to receive updated shared information.

As described above, the present invention has the advantage of distributing and synchronizing information such as a memo or schedule to be shared through a terminal or a server when there is information to be shared among members constituting a group receiving a message service. There is this. SyncML also enables users to share data with other users, as well as synchronize personally generated simple information between servers and terminals.

Claims (15)

A data synchronization system including a messenger server for storing at least one contact list having information of terminals belonging to one messenger group, and a synchronization server for synchronizing the information of the terminals. When the synchronization server transmits a synchronization request message including information data to be shared between the group from the first terminal of the terminals, the synchronization server stores the information data, and requests the information data synchronization request from the second terminal of the terminals. Correspondingly receiving a contact list for the second terminal from the messenger server and synchronizing with the information data when it is determined that the second terminal belongs to the group of the first terminal through the contact list. system. The method of claim 1, The information data is any one of a file, a note, group announcement information, e-mail, schedule information, vCalender, and a business card. The method of claim 1, And the synchronization server synchronizing the information data to the second user terminal provides information data generated, changed or deleted from the first user terminal. A data synchronization system comprising a messenger server for storing at least one contact list having information of terminals belonging to one messenger group, and a synchronization server for synchronizing the information of the terminals. In the method for performing data synchronization with the terminals, Storing the information data when a synchronization request including information data for sharing between the groups is transmitted from a first terminal of the terminals; Requesting a contact list of the second terminal to the messenger server when an information data synchronization request is received from a second terminal among the terminals; And if it is determined that the second terminal belongs to the group of the first terminal through the contact list received in response to the request, synchronizing to the information data. The method of claim 4, wherein The information data may be any one of a file, a note, group announcement information, e-mail, schedule information, vCalender, and business card. The method of claim 4, wherein the synchronizing with the information data according to whether the second subscriber terminal joins the group provides information data generated, changed, or deleted from the first user terminal. A data synchronization system including a messenger server for storing at least one contact list having information of terminals belonging to one messenger group, and a synchronization server for synchronizing the information of the terminals. When the messenger server is provided with a sharing information update request message from a first terminal among the terminals belonging to the group, the messenger server provides the synchronization server with the contact list read in correspondence with the first terminal and information of the first terminal to the synchronization server. After synchronizing with the first terminal using the first terminal information, the synchronization server stores sharing information from the first terminal and is included in the contact list for the first terminal using the sharing information. A system characterized in that to perform synchronization with the terminals sequentially. The method of claim 7, wherein The shared information is information created, changed or deleted by the first user terminal. The shared information includes a file, a note, a group announcement information, an e-mail, a schedule information, a vCalender, a business card. system of any one of the following. A data synchronization system including a messenger server for storing at least one contact list having information of terminals belonging to one messenger group, and a synchronization server for synchronizing the information of the terminals. When the messenger server provides information on the first terminal to the synchronization server according to a request for updating the sharing information from the first terminal among the terminals belonging to the group, the synchronization server synchronizes with the first terminal to share the shared information. Store the message and inform the messenger server of the completion of synchronization, and receive information of the target terminal according to the contact list for the first terminal provided from the messenger server, and then the synchronization server synchronizes the shared information with the target terminal. System characterized in that it performs. The method of claim 9, The shared information is information created, changed or deleted by the first user terminal. The shared information includes a file, a note, a group announcement information, an e-mail, a schedule information, a vCalender, a business card. system of any one of the following. A data synchronization system comprising a messenger server for storing at least one contact list having information of terminals belonging to one messenger group, and a synchronization server for synchronizing the information of the terminals. In the method for performing data synchronization with the terminals, Receiving, by the messenger server, a sharing information update request message from a first terminal among terminals belonging to the one group; Providing a contact list for the first terminal and information on the first terminal to the synchronization server in response to the request message; And storing, by the synchronization server, sharing information from the first terminal after synchronizing with the first terminal using the provided first terminal information. The method of claim 11, And synchronizing the terminals sequentially with the terminals included in the contact list for the first terminal using the contact list. A data synchronization system comprising a messenger server for storing at least one contact list having information of terminals belonging to one messenger group, and a synchronization server for synchronizing the information of the terminals. In the method for performing data synchronization with the terminals, Receiving, by the messenger server, a sharing information update request message from a first terminal among terminals belonging to the one group; Providing, by the messenger server, information of the first terminal to the synchronization server in response to the request message; And synchronizing with the first terminal by the synchronization server to store shared information. The method of claim 13, Notifying the messenger server of completion of synchronization after the synchronization server stores the shared information; If the messenger server recognizes that the synchronization is completed, selecting a target terminal according to the contact list for the first terminal and transmitting the selected target terminal information to the synchronization server; And synchronizing the shared information with the target terminal by the synchronization server using the target terminal information. The method of claim 13, wherein the synchronization server synchronizes with the first terminal by using the provided information to store sharing information. Receiving, by the synchronization server, any one of information generated, changed, and deleted from the first terminal; And updating, by the synchronization server, information to be shared among terminals belonging to the one group with sharing information provided from the first terminal.

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