KR20070077734A - Method for synchronizing a database between a communication terminal and server - Google Patents

Abstract

A method for synchronizing a database between a communication terminal and a server is provided to keep user data stored in the communication terminal before initial database synchronization by separately storing the latest user data to the communication terminal in the initial synchronization and inputting the stored user data to the synchronized database after the initial synchronization. The communication terminal checks whether a received synchronization command is an initial synchronization command by detecting an update ID from a communication terminal database and/or a server database(S22). If the received synchronization command is the initial synchronization command, the previously stored user data is stored to a separate memory, and the communication terminal database and the server database are synchronized(S24). The user data stored in the separate memory is inputted to the database of the communication terminal after the synchronization(S25). The update ID is the last anchor of a SyncML(Synchronized Markup Language) standard.

Description

METHOOD FOR SYNCHRONIZING A DATABASE BETWEEN A COMMUNICATION TERMINAL AND SERVER}

1 is an explanatory diagram of database synchronization between a normal communication terminal and a server.

2 is a database synchronization flowchart of a communication terminal and a server according to the present invention.

** Description of the symbols for the main parts of the drawings **

The present invention relates to database synchronization between a communication terminal and a server, and more particularly, to a method for maintaining existing user data during initial synchronization.

Communication terminals, such as mobile terminals, portable computers, and personal digital assistants (PDAs), have a database of various data.

In order to provide normal service, the database of such a communication terminal must match the database of the server. Such matching operation between the database of the communication terminal and the database of the server is referred to as synchronization of the database.

1 is a schematic diagram of database synchronization between a general communication terminal and a server, and a server 11 and a communication terminal 12 capable of communicating with each other are shown.

Referring to FIG. 1, the synchronization of the database between the server 11 and the communication terminal 12 is a synchronization session between the communication terminal 11 and the server 12 when a synchronization command is input to the communication terminal 12 by the user. Is connected, after which the communication terminal 11 transmits a message containing the changes in its database to the server 12, and the server 12 communicates the message containing the changes in its database. It is performed by transmitting to the terminal 12. Here, the communication terminal 12 and the server 11 update their own database based on the change included in the message from the counterpart.

In the prior art, when the synchronization command is input to the communication terminal for the first time, the user data (for example, telephone number data, schedule data, etc.) created by the user and pre-stored in the communication terminal are collectively deleted and the above-described synchronization operation is performed. Was performed.

However, the initial synchronization operation according to the prior art, which deletes existing user data during the initial synchronization operation, has a problem in that the user is inconvenient.

Accordingly, an object of the present invention is to provide a synchronization method capable of preserving user data stored in a communication terminal prior to initial synchronization.

The database synchronization method between the communication terminal and the server of the present invention for achieving the above object comprises the steps of determining whether the synchronization command input to the communication terminal is the first synchronization command, the input synchronization command is the first synchronization command The method may include storing user data previously stored in the communication terminal in a separate memory and performing synchronization of a database of the communication terminal.

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

2 is a flowchart illustrating a database synchronization between a communication terminal and a server according to the present invention. As shown in FIG. 2, a synchronization command is input to a communication terminal (S21), and a last anchor in a database of a communication terminal or a server. ) (S22), and if the last anchor does not exist, storing the user data previously stored in the communication terminal in a separate memory (S23), and synchronizing the database of the server and the communication terminal ( S24, inputting user data stored in a separate memory into the synchronized database of the communication terminal (S25), and if there is a last anchor in the step (S22), synchronizing the database of the server and the communication terminal ( S26).

First, when a user inputs a synchronization command in a communication terminal or when a preset condition is satisfied (for example, when the communication terminal is turned on and the synchronization is executed and the power of the communication terminal is turned on), A synchronization command is input (S21).

Next, it is checked whether an update identifier exists in the database of the communication terminal or the server (S22). Here, the communication terminal may include a mobile terminal (MS), a personal digital assistant (PDA), a portable computer, a telematics terminal, and the like, and the server may be a desktop computer, a remote server, or the like.

The update identifier is an arbitrary identifier indicating information on a synchronization point last performed in a communication terminal, and may be a sequence number or a time stamp for updating a database, and is called a last anchor in the SynML standard. The first synchronization using the last anchor will be described in detail as follows.

For synchronization of databases, the Synchronized Markup Language (SyncML) standard based on the Extended Markup Language (XML) is mainly used.

The SyncML standard uses synchronization anchors associated with databases. The synchronization anchors are strings that describe synchronization events by date and time. Such synchronization anchors include a last anchor and a next anchor, where the last anchor indicates the last event that the database is synchronized with and the next anchor indicates the synchronization event currently in progress.

That is, if a synchronization operation is performed in a database of a communication terminal or a server at least once, the last anchor is associated with each database. Therefore, whether or not this synchronization command is for initial synchronization is determined by determining whether the last anchor exists. You can judge.

If the last anchor does not exist in the step S22, the user data previously stored in the communication terminal are stored in a separate memory (S23). That is, in order to preserve user data, such as a phone book or a schedule manager, created by the user and pre-stored in the communication terminal, the user data is stored in a separate memory before the initial synchronization is performed.

Thereafter, database synchronization between the communication terminal and the server is performed (S24). The database synchronization is performed by sending and receiving a message, for example, a SyncML message according to the SyncML standard, through a synchronization session connected between a communication terminal and a server.

Referring to the synchronization of the database through the transmission and reception of the SyncML message, when a synchronization command is input to the communication terminal, a synchronization session is connected by transmitting and receiving a SyncML message between the communication terminal and the server, and the communication terminal or the server in the database through the synchronization session. Sends a SyncML message including the change information of to the counterpart, and the counterpart updates its database based on the change information.

Then, the user data stored in the separate memory in the step (S23) is input to the synchronized database of the communication terminal (S25). In more detail, the user data may be input to a data table constituting a database through a structured query language (SQL) query. Through this, the user data stored in a separate memory separate from the database of the communication terminal is integrated into the database of the communication terminal.

If there is a last anchor in step S22, database synchronization between the communication terminal and the server is immediately performed (S26). This is because the user data previously stored in the communication terminal are not deleted during the synchronization process. Rather, the user data is included in the message transmitted to the server as a change of the communication terminal, and the server is based on the user data included in the message. Updates his database with

Those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential features of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described in detail above, the present invention determines whether the synchronization to be executed is the first synchronization, and in the case of the first synchronization, separately stores user data previously stored in the communication terminal, and stores the user data stored separately after the initial synchronization is performed in the synchronized database. By input, there is an effect of preserving user data created before the first synchronization execution.

Claims (4)

Determining whether the synchronization command input to the communication terminal is the first synchronization command; When the input synchronization command is an initial synchronization command, storing user data previously stored in the communication terminal in a separate memory, and performing synchronization between the database of the communication terminal and the database of the server. Database synchronization method between the terminal and the server. The method of claim 1, And after performing synchronization of the database, inputting user data stored in the separate memory into a database of the telematics terminal. The method according to claim 1 or 2, Determining whether the synchronization command is the first synchronization command, And detecting the presence or absence of an update identifier in the database of the communication terminal, the server, or both. The method of claim 3, wherein And said update identifier is a last anchor of SyncML standard.

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