JP2010211774A - Terminal device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To execute data synchronization with a different terminal device. <P>SOLUTION: This terminal device for performing data synchronization with a first terminal device includes: an acquiring part for acquiring time information from the first terminal device; an updating time recording part for calculating a time difference between the time information and time information belonging to the terminal device, and recording an updating time of data updated after the preceding time when the time information is acquired, out of data stored in the terminal device by using the time difference; a processing part for comparing the recorded updating time with the updating time of the data stored in the first terminal device and updating the data in the terminal device to data of the latest updating time; and a time information recording part for recording time information after being updated to the data of the latest updating time. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal apparatus and method for synchronizing data with a mobile communication terminal.

  With the enforcement of the Personal Information Protection Law, companies are becoming more aware of the handling of data stored in mobile communication terminals.

  The mobile communication terminal includes a communication device having a wireless communication function such as a mobile phone or a personal digital assistant (PDA). For example, regarding the handling of data stored in a mobile communication terminal, there is an increasing demand for management of data stored in the mobile communication terminal and countermeasures in the event that the mobile communication terminal is lost. As one of techniques for managing data and dealing with loss of a mobile communication terminal, there is a method of managing data between the mobile communication terminal and the terminal device.

  Terminal devices include personal computers and electronic computers such as servers. The terminal device may be connected to the mobile communication terminal via a network. In the method of managing data in each of the mobile communication terminal and the terminal device, when deletion, change, or addition occurs to the data stored in the mobile communication terminal, it is necessary to reflect the data on the terminal device. When reflecting the data in the terminal device, it is necessary to perform data synchronization between the terminal device and the mobile communication terminal. Data synchronization refers to edits such as deletion, change, and addition performed on data stored in a mobile communication terminal in the terminal device, and at least part of the data stored in the terminal device is reflected in the mobile communication terminal Is equal to the data stored in. When the data update time is used as a reference for data synchronization, the terminal device has the latest data update time compared to the data update time stored in the terminal device among the data stored in the mobile communication terminal. Are considered to be data that has been edited such as deletion, change, addition, etc., and the data is reflected on the terminal device.

JP 2006-4018 A

  When the data update time is used as a reference for performing data synchronization, it is necessary to share the correct time between the mobile communication terminal and the terminal device. In the mobile communication terminal, the data update time is set by the internal time information of the mobile communication terminal, and in the terminal device, the data update time is set by the internal time information of the terminal device. This is because if the correct time is not shared between the mobile communication terminal and the terminal device, it cannot be determined which of the data stored in the mobile communication terminal and the data stored in the terminal device is the latest data. .

  As a method for sharing the correct time, there is a method in which the mobile communication terminal and the terminal device acquire time information from a time synchronization server. The mobile communication terminal and the terminal device correctly adjust the internal clock via the network by NTP (Network Time Protocol) or the like.

  However, a method for acquiring time information from a time synchronization server cannot be applied to a personal computer used without being connected to a network.

  Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a terminal device and a method capable of executing data synchronization with other terminal devices.

In order to solve the above problems, the terminal device
A terminal device that performs data synchronization with a first terminal device,
A time information acquisition unit for acquiring time information from the first terminal device;
A time difference between the time information acquired by the time information acquisition unit and the time information of the terminal device is obtained, and the first terminal of the data stored in the terminal device is obtained using the time difference. An update time recording unit that records the update time of the corresponding data updated since the time when the time information was last acquired from the device;
Data for comparing the update time recorded by the update time recording unit with the update time of the data stored in the first terminal device, and updating the corresponding data in the terminal device to the latest update time data A synchronization processing unit;
A time information recording unit for recording time information after the data in the terminal device is updated to the latest update time data by the data synchronization processing unit.

This terminal device
A terminal device that performs data synchronization with a second terminal device,
The second terminal device acquires time information from the terminal device, obtains a time difference between the time information and time information of the second terminal device, and uses the time difference to Among the data stored in the terminal device, the update time of the data updated after the time when the accurate time information was previously acquired from the terminal device is recorded, and the recorded update time is stored in the terminal device. And update the corresponding data in the second terminal device to the data of the latest update time,
The terminal device
A time information acquisition unit for acquiring time information;
A time information notification unit that notifies the time information acquired by the time information acquisition unit in response to a request for time information from the second terminal device;
Data for comparing the update time of the data stored in the second terminal device with the update time of the data stored in the terminal device, and updating the corresponding data in the terminal device to the data of the latest update time And a synchronization processing unit.

This method
A method in a terminal device that performs data synchronization with a first terminal device,
A time information acquisition step of acquiring time information from the first terminal device;
A time difference between the time information acquired by the time information acquisition step and the time information possessed by the terminal device is obtained, and the first terminal of the data stored in the terminal device is obtained using the time difference. An update time recording step for recording the update time of the corresponding data updated since the time when the time information was last acquired from the device;
Data for comparing the update time recorded in the update time recording step with the update time of the data stored in the first terminal device, and updating the corresponding data in the terminal device to the latest update time data Synchronous processing steps;
A time information recording step of recording time information after the corresponding data in the terminal device is updated to data of the latest update time by the data synchronization processing step.

This method
A method in a terminal device that performs data synchronization with a second terminal device,
The second terminal device acquires time information from the terminal device, obtains a time difference between the time information and time information of the second terminal device, and uses the time difference to Among the data stored in the terminal device, the update time of the data updated after the time when the time information was previously acquired from the terminal device is recorded, and the recorded update time and the stored time information are stored in the terminal device. Compare the data update time, update the corresponding data in the second terminal device to the latest update time data,
The terminal device
A time information acquisition step of acquiring time information;
A time information notifying step for notifying time information in response to a request for time information from the second terminal device;
Data for comparing the update time of the data stored in the second terminal device with the update time of the data stored in the terminal device, and updating the corresponding data in the terminal device to the data of the latest update time A synchronization processing step.

  According to the disclosed terminal device and method, data synchronization can be executed with other terminal devices.

It is a functional block diagram which shows the system according to a present Example. It is a functional block diagram which shows the mobile communication terminal according to a present Example. It is a functional block diagram which shows the terminal device according to a present Example. It is explanatory drawing which shows the correction method of the data update time according to a present Example. It is a flowchart which shows operation | movement of the system according to a present Example. It is a flowchart which shows operation | movement of the system according to a present Example. It is a flowchart which shows operation | movement of the system according to a present Example. It is a flowchart which shows operation | movement of the system according to a present Example. It is a flowchart which shows operation | movement of the system according to a present Example.

Next, the form for implementing this invention is demonstrated, referring drawings based on the following Examples.
In all the drawings for explaining the embodiments, the same reference numerals are used for those having the same function, and repeated explanation is omitted.

<System>
FIG. 1 shows a system according to this embodiment.

  This system includes a mobile communication terminal 100 and a terminal device 200. The mobile communication terminal 100 may include a mobile phone or a portable information terminal. Mobile communication terminal 100 is wirelessly connected to network 300. The network 300 may include a mobile communication network, the Internet, and the like. The terminal device 200 may include a server, a personal computer (PC), and the like. The mobile communication terminal 100 receives accurate time information wirelessly transmitted from the network 300. On the other hand, since the terminal device 200 is not connected to the network 300, accurate time information cannot be acquired. The mobile communication terminal 100 and the terminal device 200 are connected by a cable 50 with a cable.

  In the wireless communication system, when data synchronization is performed between the mobile communication terminal 100 and the terminal device 200, the terminal device 200 determines whether accurate time information can be acquired. When the terminal device 200 determines that accurate time information cannot be acquired, the terminal device 200 requests the mobile communication terminal 100 for accurate time information. Data synchronization reflects the editing performed on the data stored in the mobile communication terminal 100, such as deletion, change, and addition, to the terminal device 200, and at least part of the data stored in the terminal device 200 is reflected. It is to be equal to the data stored in the mobile communication terminal 100. For data synchronization, edits such as deletion, change, and addition performed on data stored in the terminal device 200 are reflected in the mobile communication terminal 100, and at least the data stored in the mobile communication terminal 100 is reflected. This includes making a part equal to the data stored in the terminal device 200.

  The terminal device 200 compares the accurate time information acquired from the mobile communication terminal 100 with the time information that the terminal device 200 has, and obtains a correction time for the time information that the terminal device 200 has. In other words, the difference between the time of the terminal device 200 and the accurate time (hereinafter referred to as the time difference) is obtained. The terminal device 200 corrects the update time of the data recorded in the data stored in the terminal device 200 using the time difference. After the data update time is corrected in the terminal device 200, data synchronization is performed between the mobile communication terminal 100 and the terminal device 200.

  Means for obtaining accurate time information by obtaining accurate time information from the mobile communication terminal 100 and correcting the data update time recorded in the data stored in the terminal device 200 based on the time information. Data synchronization can be performed between the terminal device 200 that does not include the mobile communication terminal 100 and the mobile communication terminal 100.

<Mobile communication terminal>
FIG. 2 shows a mobile communication terminal 100 according to the present embodiment.

  The mobile communication terminal 100 includes an antenna 102, a reception unit 104, a time information acquisition unit 106, a synchronization control unit 108, a transmission / reception unit 110, and a storage unit 112. The synchronization control unit 108 includes a time information notification unit 1082 and a data synchronization processing unit 1084.

  Downlink data transmitted from a radio base station (not shown) is input to the receiving unit 104 via the antenna 102. The radio base station constantly reports accurate time information. The radio base station is connected to a mobile communication network.

  The receiving unit 104 is connected to the antenna 102 and converts a radio signal input via the antenna 102 into a modulated signal. Then, the receiving unit 104 converts the modulated signal into a baseband signal and inputs the baseband signal to the time information acquisition unit 106. The receiving unit 104 receives broadcast information from the radio base station when the communication mode is switched. For example, when the communication mode is switched, the time of activation, the return to the service area, and the end of the call may be included. The receiving unit 104 may periodically receive the notification information.

  The time information acquisition unit 106 is connected to the reception unit 104. The time information acquisition unit 106 acquires time information from the baseband signal input by the reception unit 104. The time information acquisition unit 106 inputs time information to the synchronization control unit 108.

  The synchronization control unit 108 is connected to the time information acquisition unit 106. The synchronization control unit 108 controls data synchronization performed with the terminal device 200.

  When the time information is requested from the terminal device 200, the time information notification unit 1082 transmits the time information via the transmission / reception unit 110 in response to the request.

  When data synchronization processing is started between the mobile communication terminal 100 and the terminal device 200 and data stored in the mobile communication terminal 100 is requested from the terminal device 200, the data synchronization processing unit 1084 responds to the request. In response, the data stored in the storage unit 112 is transferred to the terminal device 200 via the transmission / reception unit 110. The data includes an update time. Specifically, the data is stored in a file format, and each file includes an update time. When a file is transmitted from the terminal device 200, the data synchronization processing unit 1084 stores the file in the storage unit 112. The file may include an updated file. In other words, the file stored in the mobile communication terminal 100 is updated to the file transmitted by the terminal device 200.

  The transmission / reception unit 110 is connected to the synchronization control unit 108. The transmission / reception unit 110 transmits the time information input by the time information notification unit 1082 and / or the data input by the data synchronization processing unit 1084 to the terminal device 200 to the terminal device 200. The transmission / reception unit 110 includes an interface with the terminal device 200.

  The storage unit 112 is connected to the data synchronization processing unit 1084. The storage unit 112 stores data. The data includes an update time. Specifically, the data is stored in a file format, and each file includes an update time.

<Terminal device>
FIG. 3 is a functional block diagram showing the terminal device 200 according to the present embodiment.

  The terminal device 200 includes a synchronization control unit 202, a transmission / reception unit 204, and a storage unit 206. The synchronization control unit 202 includes a time information acquisition determination unit 2022, a time information acquisition unit 2024, a data update time correction unit 2026, and a data synchronization processing unit 2028.

  The synchronization control unit 202 controls data synchronization performed with the mobile communication terminal 100.

  The time information acquisition determination unit 2022 determines whether the terminal device 200 can acquire accurate time information. The time information acquisition determination unit 2022 determines that accurate time information can be acquired when the terminal device 200 is connected to the network 300. In other words, the time information acquisition determination unit 2022 determines whether a time synchronization process such as NTP is operating. The time information acquisition determination unit 2022 may determine that accurate time information can be acquired when the time information has the same time information as the mobile communication terminal 100 has. However, even when the time information acquisition determination unit 2022 has time information different from the time information that the mobile communication terminal 100 has, if the time difference is within an error range (for example, ± 1 sec or less), the same time information It may be determined that When the time information acquisition determination unit 2022 determines that accurate time information can be acquired, the time information acquisition determination unit 2022 notifies the data synchronization processing unit 2028 that accurate time information can be acquired. In accordance with the notification, the data synchronization processing unit 2028 performs data synchronization with the mobile communication terminal 100. This is because it is determined that time synchronization with the mobile communication terminal 100 is established. When the time information acquisition determination unit 2022 determines that accurate time information cannot be acquired, the time information acquisition determination unit 2022 notifies the data update time correction unit 2026 that accurate time information cannot be acquired, and notifies the time information acquisition unit 2024 of the accurate time information. Order to get information.

The time information acquisition unit 2024 is connected to the time information acquisition determination unit 2022. The time information acquisition unit 2024 requests the current time information from the mobile communication terminal 100 connected to the terminal device 200 when the time information acquisition determination unit 2022 determines that accurate time information cannot be acquired. To do. The request is transmitted from the transmission / reception unit 204. The time information acquisition unit 2024 acquires the current time _{tthis_Te} from the mobile communication terminal 100 via the transmission / reception unit 204. The time information acquisition unit 2024 _inputs the current time _{tthis_Te} to the data update time correction unit 2026.

The data update time correction unit 2026 is connected to the time information acquisition determination unit 2022, the time information acquisition unit 2024, and the storage unit 206. The data update time correction unit 2026 stores the time at which data synchronization was performed with the mobile communication terminal 100 (hereinafter referred to as data synchronization time). The data synchronization time may be held in the mobile communication terminal 100 and the terminal device 200. The data update time correction unit 2026 _obtains an elapsed time t _ran between the previous data synchronization time t _pre and the current time t _{this_Te} (t _ran = t _{this_Te} −t _pre ). Then, using the elapsed time t _ran , the data update time correction unit 2026 corrects the update time of the file updated from the previous data synchronization time t _pre to the current time to the update time assumed to be correct.

  The correction method will be specifically described.

  FIG. 4 is a diagram illustrating the correction of the update time.

In FIG. 4, _{tthis_PC} is a time synchronized with the current time in the internal clock held by the terminal device 200 (hereinafter referred to as a synchronization time _{tthis_PC} ). In other words, the synchronization time _{tthis_PC} is the current time in the terminal device 200. The synchronization time _{tthis_PC} may include a time lag (time error) with respect to the exact time that the mobile communication terminal 100 has. _{tthis_Te} is the time synchronized with the current time in the internal clock held by the mobile communication terminal 100 (hereinafter referred to as the synchronization time _{tthis_Te} ). In other words, the synchronization time _{tthis_Te} is the current time in the terminal device 200. The synchronization time _{tthis_Te} is the correct time. The mobile communication terminal 100 notifies the terminal device 200 of the synchronization time _{tthis_Te} .

t _{n_PC} is a data update time (hereinafter, referred to as data update time t _{n_PC} ) at which the terminal device 200 updated data after the previous data synchronization time. The data update time t _{n_PC} is a time determined by an internal clock held by the terminal device 200. The data update time t _{n_PC} may include a time lag (time error) with respect to the exact time that the mobile communication terminal 100 has. Therefore, the data update time in the terminal device 200 when it is assumed that no time error is included is assumed to be t ′ _{n_PC} .

The time difference t _diff of the time synchronized between the terminal device 200 and the mobile communication terminal 100 this time is expressed by Expression (1).

T _diff = t _{this_PC} -t _{this_Te} (1)
When a time lag occurs between the mobile communication terminal 100 and the terminal device 200 at the same rate as time passes between the data update time t _{n_PC} and the data update time t ′ _{n_PC} , The relationship of formula (2) is established.

t´ _{n_PC} = t _{n_PC} + t _diff / t _ran (2)
By transforming Equation (2), Equation (3) is obtained.

t´ _{n_PC} = (t _{n_PC} -t _diff × t _pre ) / (t _ran -t _diff ) (3)
In equation (3), the data update time t _{n_PC} and the previous data synchronization time t _pre are obtained and held in the terminal device 200. The elapsed time t _ran and the time difference t _diff can be obtained from the current time t _{this_Te} notified by the mobile communication terminal 100.

Data update time correcting unit 2026 by the equation (3) is corrected to the data update time _{t'N_PC} that is assumed to correct the data update time t _{N_PC} files updated so far from the previous data synchronization time t _pre . The data update time correction unit 2026 takes out the data stored in the storage unit 206, refers to the update time of each data, and corrects the update time of the corresponding data.

  The data synchronization processing unit 2028 is connected to the time information acquisition determination unit 2022, the transmission / reception unit 204, and the storage unit 206. The data synchronization processing unit 2028 performs data synchronization using the file stored in the mobile communication terminal 100 and the file stored in the terminal device 200. The data synchronization processing unit 2028 makes at least a part of the data stored in the storage unit 206 equal to the data stored in the mobile communication terminal 100. Further, the data synchronization processing unit 2028 may perform processing so that at least a part of the data stored in the mobile communication terminal 100 is equal to at least a part of the data stored in the storage unit 206. The data synchronization processing unit 2028 refers to the data update time for a file whose identity can be confirmed among the file stored in the storage unit 206 and the file stored in the mobile communication terminal 100, and the file with the old update time. Replace with a new file. For example, the data synchronization processing unit 2028 may confirm the identity based on the file name. For example, the data synchronization processing unit 2028 may temporarily acquire a file stored in the mobile communication terminal 100 and compare the data update time with the data stored in the storage unit 206. Data synchronization may be performed for a part of the file stored in the mobile communication terminal 100.

The data update time of the file stored in the storage unit 206 is corrected by the data update time correction unit 2026 to the update time based on the correct time shared with the mobile communication terminal 100. Therefore, even when there is a time difference between the internal clock of the mobile communication terminal 100 and the internal clock of the terminal device 200, the comparison can be made with the update time based on the correct time, and the data update time is updated to a new file. it can. After the update, the previous data synchronization time t _pre used in the next data synchronization is updated. Data update time correcting unit 2026 and the data synchronization processing unit 2028, the current time t _{This_Te,} updates the previous data synchronization time t _pre.

  The transmission / reception unit 204 is connected to the time information acquisition unit 2024 and the data synchronization processing unit 2028. The transmission / reception unit 204 transmits the time information request input by the time information acquisition unit 2024 to the mobile communication terminal 100. Then, the transmission / reception unit 204 inputs the current time information transmitted from the mobile communication terminal 100 to the time information acquisition unit 2024. In addition, the transmission / reception unit 204 transmits the data request input by the data synchronization processing unit 2028 to the mobile communication terminal 100. Then, the transmitting / receiving unit inputs the file transmitted from the mobile communication terminal 100 to the data synchronization processing unit 2028.

  The storage unit 206 is connected to the data update time correction unit 2026 and the data synchronization processing unit 2028. The storage unit 206 stores data. The storage unit 206 stores the data in a file format. The file includes a data update time.

<Data synchronization method>
FIG. 5 is a flowchart showing processing in the present system.

The mobile communication terminal 100 and the terminal device 200 perform data synchronization and hold the data synchronization time t _pre used for the data synchronization (step S502).

  The mobile communication terminal 100 receives accurate time information (step S504). The mobile communication terminal 100 receives broadcast information transmitted from the radio base station. The time information acquisition unit 106 acquires time information included in the notification information.

  The mobile communication terminal 100 and the terminal device 200 are wired by the cable 50 (step S506). The transmission / reception units 110 and 204 are wired. When data synchronization is performed between a file stored in the mobile communication terminal 100 and a file stored in the terminal device 200, a wired connection is made.

  The terminal device 200 determines whether accurate time information can be acquired (step S508). The time information acquisition determination unit 2022 determines whether the terminal device 200 can acquire accurate time information. The time information acquisition determination unit 2022 may determine whether accurate time information can be acquired when the terminal device 200 and the mobile communication terminal 100 are connected by wire. The time information acquisition determination unit 2022 may determine that accurate time information can be acquired when the terminal device 200 is connected to the network 300. This is because a time synchronization process such as NTP is assumed to be operating.

  If it is determined that accurate time information can be acquired in the terminal device 200 (step S508: YES), data synchronization is executed between the mobile communication terminal 100 and the terminal device 200 (step S510). The data synchronization processing unit 2028 requests the mobile communication terminal 100 for a file stored in the mobile communication terminal 100. The data synchronization processing unit 2028 compares the data update time of the file transmitted by the mobile communication terminal 100 with the update time of the file stored in the terminal device 200 and updates the file with the latest data update time.

  On the other hand, when it is not determined that accurate time information can be acquired in the terminal device 200 (step S508: NO), the terminal device 200 requests time information from the mobile communication terminal 100 (step S512). The time information acquisition unit 2024 requests the current time information from the mobile communication terminal 100. The request is transmitted from the transmission / reception unit 204 of the terminal device 200 and received by the transmission / reception unit 110 of the mobile communication terminal 100.

The mobile communication terminal 100 notifies the terminal device 200 of the correct current time _{tthis_Te} (step S514). The time information notification unit 1082 notifies the terminal device 200 of the current time _{tthis_Te} in accordance with a request for current time information from the terminal device 200.

The terminal device 200 _obtains the time difference t _diff and the elapsed time t _{ran based} on the previous data synchronization time t _pre , the current time t _{this_Te,} and the current time t _{this_Te} (step S516). The data update time correction unit 2026 _calculates a time difference t _{diff based on} the previous data synchronization time t _pre and current time t _{this_Te of the} terminal device 200 and the current time t _{this_Te} notified by the mobile communication terminal 100. _{Find the} elapsed time t _ran .

The terminal device 200 corrects the time information of the data stored in the terminal device 200 using the time difference t _diff calculated in step S516 (step S518). The data update time correction unit 2026 corrects the data update time of the file stored in the storage unit 206 using the time difference t _diff . The data update time correction unit 2026 corrects the data update time of a file updated after the previous data synchronization time.

  Data synchronization is executed between the mobile communication terminal 100 and the terminal device 200 (step S510). The terminal device 200 requests the mobile communication terminal 100 for a file stored in the mobile communication terminal 100. The terminal device 200 compares the data update time of the file transmitted by the mobile communication terminal 100 with the update time of the file stored in the terminal device 200, and updates the file with the latest data update time. The data synchronization processing unit 2028 requests the mobile communication terminal 100 for a file stored in the mobile communication terminal 100. The data synchronization processing unit 2028 compares the data update time of the file transmitted by the mobile communication terminal 100 with the update time of the file stored in the terminal device 200 and updates the file with the latest data update time.

After the file with the old data update time is updated to the file with the latest data update time between the mobile communication terminal 100 and the terminal device 200, the mobile communication terminal 100 and the terminal device 200 have the current time _{tthis_Te} , The previous data synchronization time t _pre is updated. Data update time correcting unit 2026 and the data synchronization processing unit 2028, the current time t _{This_Te,} updates the previous data synchronization time t _pre.

  FIG. 6 is a flowchart showing details of the processing in step S518.

  In FIG. 6, n (n is a natural number) indicates the number of data (files) stored in the storage unit 206 of the terminal device 200.

  The terminal device 200 sets n = 0 (step S602). The data update time correction unit 2026 sets n = 0.

  The terminal device 200 corrects the data update time of the nth data using the time correction formula (step S604). The data update time correction unit 2026 uses the time correction formula shown by the formula (3) to update the data of the data (file) stored in the storage unit 206 that has been updated since the previous data synchronization time. Correct the time.

The terminal device 200 confirms whether correction for all data has been completed (step S606). The data update time correction unit 2026 determines whether the correction of the data update time has been completed for all data (files) stored in the storage unit 206. Here, the total data is data that has been updated after the previous data synchronization time t _pre , in other words, data whose data update time is after the previous data synchronization time t _pre .

  If correction of the data update time has not been completed for all data (step S606: NO), the terminal device 200 increases the value of n by 1 (step S608), and performs the processing from step S604. The data update time correction unit 2026 increases the value of n by 1 and corrects the data update time of the next data (file). This is continued until the data update time is corrected for all data.

  On the other hand, when the correction of the data update time is completed for all data (step S606: YES), the terminal device 200 ends the correction of the data update time.

  In the present embodiment, the connection between the mobile communication terminal 100 and the terminal device 200 is not limited to a wired connection, and may be a wireless connection. For example, near field communication technology may be applied. Specifically, a communication method according to a standard included in a wireless PAN (personal area network) may be applied, or a communication method according to a standard included in a wireless LAN may be applied. Standards included in the wireless LAN include IEEE802.11a, IEEE802.11b, IEEE802.11g, and IEEE802.11n. Standards included in the wireless PAN include UWB (Ultra Wide Band), ZigBee, Bluetooth, and the like. By making the connection between the mobile communication terminal 100 and the terminal device 200 wireless, data synchronization can be performed even when the distance between the mobile communication terminal 100 and the terminal device 200 is longer than the cable length.

  The mobile communication terminal 100 may have a GPS (Global Positioning System) receiver. Since the mobile communication terminal 100 has a GPS receiver, the current time information can be acquired from a GPS signal transmitted from a GPS satellite.

  According to the present embodiment, data synchronization can be executed between a terminal device that cannot acquire accurate time information and a mobile communication terminal. Since the data change can be confirmed between the mobile communication terminal and the terminal device based on the same synchronization standard, both data can be kept up-to-date. In addition, in the case where at least a part of data stored in the terminal device is stored in the mobile communication terminal and editing is performed at the mobile communication terminal, the file with the latest data update time is stored only in the mobile communication terminal Will be stored. Therefore, when storing at least a part of the data stored in the terminal device in the mobile communication terminal and performing editing work on the mobile communication terminal, the data stored in the mobile communication terminal is stored in the terminal device. Can be backed up.

<Modification>
The system according to this modification is the same as the system described with reference to FIG. The mobile communication terminal 100 according to this modification is described by the functional blocks shown in FIG.

<Terminal device>
The terminal device 200 according to this modification is described by the functional blocks shown in FIG. The terminal device 200 is different from the above-described terminal device in processing in the synchronization control unit 202 and the data update time correction unit 2026.

The synchronization control unit 202 sets data to be synchronized. For example, the data to be subjected to data synchronization may be data that has a change history recorded and is transmitted to the synchronization destination. The data may be set by the user. Then, after the time difference t _diff and the elapsed time t _ran are obtained by the data update time correction unit 2026, the synchronization control unit 202 instructs the data synchronization processing unit 2028 to start the data synchronization processing. To do. The data update time correction unit 2026 performs the following processing in parallel with the data synchronization processing in the data synchronization processing unit 2028.

  When the data to be synchronized is set, in other words, when there is data that may be transmitted to the mobile communication terminal 100, the data update time correction unit 2026 sets the data update time included in the data. to correct. The data transmitted to the mobile communication terminal 100 may be data that the mobile communication terminal 100 desires to edit. The data with the corrected data update time is transmitted to the mobile communication terminal 100. In addition, when the data update time correction unit 2026 receives data from the mobile communication terminal 100, the data of the data to be synchronized with the data received from the mobile communication terminal 100 among the data stored in the storage unit 206. The update time is corrected.

  By correcting the data update time of data that may be transmitted to the mobile communication terminal 100, it is possible to prevent the mobile communication terminal 100 from transmitting a file having a data update time with a different synchronization reference. 100 can prevent coexistence of files of different data update times with different synchronization standards.

  By correcting the data update time of the data to be synchronized with the data received from the mobile communication terminal 100, the data update time can be corrected for the data to be synchronized. By correcting the data update time only for data that is subject to data synchronization, data synchronization can be performed while reducing the processing load on the terminal device 200. This is because the data update time is not corrected for all data.

<Data synchronization method>
FIG. 7 is a flowchart showing processing in the present system.

  Steps S702 to S716 are the same as steps S502 to S516 in the flowchart described with reference to FIG.

  In step S718, the terminal device 200 starts data synchronization. In this modification, data to be synchronized is set. The data synchronization processing unit 2028 starts data synchronization with the mobile communication terminal 100. The terminal device 200 determines whether there is data to be transmitted to the mobile communication terminal 100 (step S720). The synchronization control unit 202 determines that there is a possibility of transmitting the data to the mobile communication terminal 100 by data synchronization when the data to be synchronized is set, and the data to be transmitted to the mobile communication terminal 100 is Judge that there is.

When there is data to be transmitted to the mobile communication terminal 100 (step S720: YES), the terminal device 200 corrects the data update time of the data to be transmitted to the mobile communication terminal 100 using the time difference t _diff calculated in step S716. (Step S722). The data update time correction unit 2026 corrects the data update time of data to be transmitted to the mobile communication terminal 100 out of the files stored in the storage unit 206 using the time difference t _diff .

  The terminal device 200 transmits data to the mobile communication terminal 100 (step S724).

  On the other hand, when it is determined in step S720 that there is no data to be transmitted to the mobile communication terminal 100 (step S720: NO), and in step S724, after the data transmission to the mobile communication terminal 100 ends, the terminal device 200 moves It is determined whether there is data to be received from the communication terminal 100 (step S726). For example, the data synchronization processing unit 2028 may determine that there is data to be received from the mobile communication terminal 100 when data synchronization is performed with the mobile communication terminal 100.

When it is determined that there is data to be received from the mobile communication terminal 100 (step S726: YES), the terminal device 200 is stored in the terminal device 200 using the time difference t _diff calculated in step S716. Among the data, the data update time of the data to be received from the mobile communication terminal 100 and the data to be synchronized with the data is corrected (step S728). The data update time correction unit 2026 uses the time difference t _diff to set the data update time of the data to be synchronized with respect to the data to be received from the mobile communication terminal 100 among the files stored in the storage unit 206. to correct.

  On the other hand, when it is determined in step S726 that there is no data to be received from the mobile communication terminal 100 (step S726: NO), and when the correction of the data update time is completed in step S728, the terminal device 200 and the mobile communication terminal 100 Is synchronized with the data, and the data synchronization is terminated (step S730). The data synchronization processing unit 2028 compares the data update time included in the data received from the mobile communication terminal 100 with the corrected data update time included in the data to be synchronized with the data, and performs data synchronization. Do.

After the file including the old data update time is updated to the file having the latest data update time between the mobile communication terminal 100 and the terminal device 200, the mobile communication terminal 100 and the terminal device 200 are updated at the current time _{tthis_Te} . The previous data synchronization time t _pre is updated. Data update time correcting unit 2026 and the data synchronization processing unit 2028, the current time t _{This_Te,} updates the previous data synchronization time t _pre.

  FIG. 8 is a flowchart showing details of the processing in step S722.

  In FIG. 8, n (n is a natural number) indicates the number of data (files) that the terminal device 200 transmits to the mobile communication terminal 100. This is the number of data set as data to be synchronized.

  The terminal device 200 sets n = 0 (step S802). The data update time correction unit 2026 sets n = 0.

The terminal device 200 determines whether the nth data has an update history (step S804). The data update time correction unit 2026 refers to the data update time included in the nth data, and determines whether the data has been updated after the previous data synchronization time _tpre .

  If it is not determined that the data has been updated (step S804: NO), the terminal device 200 confirms whether confirmation of all transmission data has been completed (step S806). The data update time correction unit 2026 determines whether or not the update history has been confirmed for all data (files) to be transmitted.

  When the confirmation of the data update time is completed (step S806: YES), the terminal device 200 ends the correction of the data update time.

  On the other hand, if it is determined in step S804 that the data has been updated (step S804: YES), the terminal device 200 corrects the data update time of the nth data using the time correction formula (step S808). . The data update time correction unit 2026 corrects the data update time of the nth data (file) using the time correction formula shown by the formula (3).

  If it is not determined in step S806 that the data update time has been confirmed, and after the data update time of the nth data is corrected in step S808, the terminal device 200 increases the value of n by 1. (Step S810), the processing from Step S804 is performed. The data update time correction unit 2026 increments the value of n by 1 and performs the same processing as steps S804 to S810 on the next data (file) to be transmitted. Continue for all data to be transmitted.

  FIG. 9 is a flowchart showing details of the processing in step S728.

  In FIG. 9, n (n is a natural number) indicates the number of data (files) received from the mobile communication terminal 100 by the terminal device 200.

  The terminal device 200 sets n = 0 (step S902). The data update time correction unit 2026 sets n = 0.

The terminal device 200 determines whether there is an update history in the nth received data (step S904). The data update time correction unit 2026 refers to the data update time included in the nth received data, and determines whether data has been updated since the previous data synchronization time _tpre .

  If it is not determined that the data has been updated (step S904: NO), the terminal device 200 confirms whether confirmation of all received data has been completed (step S906). The data update time correction unit 2026 determines whether or not the update history has been confirmed for all received data (files).

  When the confirmation of the data update time is completed (step S906: YES), the terminal device 200 ends the correction of the data update time.

  On the other hand, if it is determined in step S904 that the data has been updated (step S904: YES), the terminal device 200 is included in the data to be synchronized with the nth data by the time correction formula. The data update time is corrected (step S908). The data update time correction unit 2026 is included in the data to be synchronized with the nth data (file) among the data stored in the storage unit 206 using the time correction formula shown by the formula (3). Correct the data update time. The data update time correction unit 2026 determines whether the data is the synchronization target data, for example, based on the file name.

  If it is not determined in step S906 that the data update time has been confirmed, and after the data update time is corrected in step S908, the terminal device 200 increases the value of n by 1 (step S910). The process from step S904 is performed. The data update time correction unit 2026 increments the value of n by 1 and performs the same processing as steps S904 to S910 on the next received data (file). Continue for all received data.

  In this modification, the connection between the mobile communication terminal 100 and the terminal device 200 is not limited to a wired connection, and may be a wireless connection. For example, the short-range wireless communication technology may be applied as in the above-described embodiment.

In the embodiment and the modification described above, the terminal device 200 has been described with respect to the case where the update time of the file updated from the previous data synchronization time t _pre to the present is corrected to the update time assumed to be correct. However, the terminal device 200 may record (hold) the update time assumed to be correct without correcting the update time of the file. In other words, the terminal device 200 holds the update time assumed to be correct as a log. Further, the terminal device 200 may give the update time assumed to be correct to the file without correcting the update time of the file.

  In the embodiment and the modification described above, a case where data synchronization is executed between the terminal device 200 that cannot acquire accurate time information and the mobile communication terminal 100 that can acquire accurate time information is described. did. However, the present invention can be applied to the case where it cannot be guaranteed that the mobile communication terminal 100 has accurate time information, in other words, the internal clock cannot be guaranteed to be accurate. When it cannot be guaranteed that the mobile communication terminal 100 has accurate time information, the same processing as described above is performed on the assumption that the mobile communication terminal 100 has accurate time information.

  It is also possible to perform data synchronization based on the time information of one of the internal clock of the mobile communication terminal 100 and the internal clock of the terminal device 200. When data synchronization is performed based on the time of one of the mobile communication terminal 100 and the terminal device 200, the mobile communication terminal 100 and the terminal device 200 each record the date and time when the internal clock is corrected. Then, each of the mobile communication terminal 100 and the terminal device 200 calculates a time interval in which the internal clock is corrected. For example, the mobile communication terminal 100 and the terminal device 200 each calculate a time interval between “the previous date and time when the internal clock is corrected” and “the previous date and time when the internal clock is corrected”. The terminal device 200 may perform data synchronization based on the time information with the shorter time interval. This is because it is assumed that the time information with the shorter time interval corrected for the internal clock is closer to the accurate time.

  In the above-described embodiments and modifications, the case where data synchronization is performed between the mobile communication device 100 and the terminal device 200 has been described. However, any device that can acquire accurate time information and notify the terminal device of the accurate time information can be applied without being limited to the mobile communication device 100. More generally, the present invention can be applied to terminal devices including mobile communication terminals, communication devices, and the like.

In the embodiment and the modification described above, the case where the data update time of data updated after the previous data synchronization time t _pre is described, but the time when the internal clock of the terminal device 200 is the correct time is described. If known, the time may be used.

  According to the present embodiment and the present modification, a terminal device 200 that performs data synchronization with the mobile communication terminal 100 as the first terminal device is provided. The terminal device 200 includes a time information acquisition unit that acquires accurate time information from the first terminal device, a time difference between the time information acquired by the time information acquisition unit and the time information of the terminal device. Update time to record the update time of the corresponding data updated since the time when the time information was previously acquired from the first terminal device among the data stored in the terminal device using the time difference The update time recorded by the recording unit, the update time recording unit, and the update time of the data stored in the first terminal device are compared, and the corresponding data in the terminal device is the data of the latest update time. And a time information recording unit for recording time information after the corresponding data in the terminal device is updated to data of the latest update time by the data synchronization processing unit.

  The terminal device 200 is obtained by obtaining a time difference between the acquired time information and the time information of the terminal device 200 and recording the update time of the corresponding data stored in the terminal device 200 using the time difference. Can perform data synchronization with the mobile communication terminal 100 using the recorded data update time.

  Furthermore, the terminal device includes a time information acquisition determination unit that determines whether accurate time information can be acquired. The time information acquisition unit acquires accurate time information from a first terminal device that can acquire accurate time information when the time information acquisition determination unit determines that accurate time information cannot be acquired.

  By obtaining the time difference between the acquired accurate time information and the time information of the terminal device 200 and recording the update time of the corresponding data stored in the terminal device 200 using the time difference, the terminal The apparatus 200 can execute data synchronization with the mobile communication terminal 100 even when accurate time cannot be obtained.

  Furthermore, the terminal device includes an update time correction unit that corrects the update time of the corresponding data to the update time recorded by the update time recording unit.

  By correcting the update time of the corresponding data to the update time recorded by the update time recording unit, the terminal device 200 performs data synchronization with the mobile communication terminal 100 using the data whose update time is corrected. Can be executed.

  Furthermore, the terminal device includes an update time giving unit that gives the update time recorded by the update time recording unit to the corresponding data.

  By giving the update time recorded by the update time recording unit to the corresponding data, the terminal device 200 executes data synchronization with the mobile communication terminal 100 using the data to which the update time is given. can do.

  Furthermore, the terminal device includes a transmission data setting unit that sets data to be transmitted to the first terminal device, and a transmission unit that transmits data set by the transmission data setting unit to the first terminal device. Have. The update time correction unit corrects the update time of data updated after the time when the time information was previously acquired from the first terminal device among the data set by the transmission data setting unit.

  By correcting the update time included in the data to be transmitted to the first terminal device, only the update time included in the data transmitted to the first terminal device is corrected, and therefore stored in the first terminal device. The synchronization reference between the data update times can be made the same.

  Furthermore, the terminal device includes a data receiving unit that receives data from the first terminal device. The update time correction unit is an update time of data updated since the time when the time information was previously acquired from the first terminal device among the data to be synchronized with the data received by the data reception unit Correct.

  By correcting the update time included in the data to be synchronized with the data received from the first terminal device, only the update time included in the data to be synchronized with the data received from the first terminal device is corrected. The synchronization reference between the data received from the first terminal device and the update time of the data stored in the terminal device can be made the same.

  According to this embodiment and this modification, a mobile communication terminal 100 is provided as a terminal device that performs data synchronization with the terminal device 200 as a second terminal device. The second terminal device acquires time information from the terminal device, obtains a time difference between the time information and time information of the second terminal device, and uses the time difference to Among the data stored in the terminal device, the update time of the data updated after the time when the time information was previously acquired from the terminal device is recorded, and the recorded update time and the stored time information are stored in the terminal device. The data update time is compared, and the corresponding data in the second terminal device is updated to the latest update time data. The terminal device includes a time information acquisition unit that acquires time information, and time information that notifies the time information acquired by the time information acquisition unit in response to a request for accurate time information from the second terminal device. The notification unit compares the update time of the data stored in the second terminal device with the update time of the data stored in the terminal device, and sets the corresponding data in the terminal device to the data of the latest update time. And a data synchronization processing unit to be updated.

  In response to a request for time information from the second terminal device, the time information acquired by the time information acquisition unit is notified, the update time of data stored in the second terminal device, and the terminal device Is compared with the update time of the corresponding data stored in the terminal, and the corresponding data in the terminal device is updated to the data of the latest update time, so that the same synchronization is established between the terminal device and the second terminal device. Data synchronization can be performed on the basis.

  Furthermore, the second terminal device determines whether or not accurate time information can be acquired. When it is determined that the accurate time information cannot be acquired, the second terminal device acquires accurate time information from the terminal device. The time information acquisition unit acquires accurate time information, and the time information notification unit notifies accurate time information.

  In response to a request for accurate time information from the second terminal device, the accurate time information acquired by the time information acquisition unit is notified, and an update time of data stored in the second terminal device; By comparing the update time of the corresponding data stored in the terminal device and updating the corresponding data in the terminal device to the data of the latest update time, between the terminal device and the second terminal device Data synchronization can be performed with the same synchronization standard.

  For convenience of explanation, specific numerical examples will be described to facilitate understanding of the invention. However, unless otherwise specified, these numerical values are merely examples, and any appropriate value may be used.

  Although the present invention has been described above with reference to specific embodiments, each embodiment is merely an example, and those skilled in the art will understand various variations, modifications, alternatives, substitutions, and the like. I will. For convenience of explanation, an apparatus according to an embodiment of the present invention has been described using a functional block diagram, but such an apparatus may be realized by hardware, software, or a combination thereof. The present invention is not limited to the above-described embodiments, and various variations, modifications, alternatives, substitutions, and the like are included without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 50 Cable 100 Mobile communication terminal 102 Antenna 104 Reception part 106 Time information acquisition part 108 Synchronization control part 1082 Time information notification part 1084 Data synchronization processing part 110 Transmission / reception part 112 Storage part 200 Terminal apparatus 202 Synchronization control part 2022 Time information acquisition determination part 2024 Time information acquisition unit 2026 Data update time correction unit 2028 Data synchronization processing unit 204 Transmission / reception unit 206 Storage unit 300 Network

Claims (12)

A terminal device that performs data synchronization with a first terminal device,
A time information acquisition unit for acquiring time information from the first terminal device;
A time difference between the time information acquired by the time information acquisition unit and the time information of the terminal device is obtained, and the first terminal of the data stored in the terminal device is obtained using the time difference. An update time recording unit that records the update time of the corresponding data updated since the time when the time information was last acquired from the device;
Data for comparing the update time recorded by the update time recording unit with the update time of the data stored in the first terminal device, and updating the corresponding data in the terminal device to the latest update time data A synchronization processing unit;
A time information recording unit that records time information after the corresponding data in the terminal device is updated to data of the latest update time by the data synchronization processing unit. The terminal device according to claim 1,
It has a time information acquisition determination unit that determines whether accurate time information can be acquired,
The time information acquisition unit acquires accurate time information from a first terminal device that can acquire accurate time information when the time information acquisition determination unit determines that accurate time information cannot be acquired. . The terminal device according to claim 1,
The terminal device which has an update time correction | amendment part which correct | amends the update time of the said data to the update time recorded by the said update time recording part. The terminal device according to claim 1,
The terminal device which has an update time provision part which assign | provides the update time recorded by the said update time recording part to the said applicable data. The terminal device according to claim 3,
A transmission data setting unit for setting data to be transmitted to the first terminal device;
A transmission unit that transmits the data set by the transmission data setting unit to the first terminal device,
The update time correction unit corrects the update time of data updated after the time when the time information was previously acquired from the first terminal device among the data set by the transmission data setting unit. Terminal device to do. The terminal device according to claim 3,
A data receiving unit for receiving data from the first terminal device;
The update time correction unit is an update time of data updated since the time when the time information was previously acquired from the first terminal device among the data to be synchronized with the data received by the data reception unit Terminal device for correcting A terminal device that performs data synchronization with a second terminal device,
The second terminal device acquires time information from the terminal device, obtains a time difference between the time information and time information of the second terminal device, and uses the time difference to Among the data stored in the terminal device, the update time of the data updated after the time when the time information was previously acquired from the terminal device is recorded, and the recorded update time and the stored time information are stored in the terminal device. Compare the data update time, update the corresponding data in the second terminal device to the latest update time data,
The terminal device
A time information acquisition unit for acquiring time information;
A time information notification unit that notifies the time information acquired by the time information acquisition unit in response to a request for time information from the second terminal device;
Data for comparing the update time of the data stored in the second terminal device with the update time of the data stored in the terminal device, and updating the corresponding data in the terminal device to the data of the latest update time A terminal device having a synchronization processing unit. The terminal device according to claim 7,
The second terminal device determines whether accurate time information can be acquired, and when determining that the accurate time information cannot be acquired, acquires accurate time information from the terminal device,
The time information acquisition unit acquires accurate time information,
The time information notification unit is a terminal device that notifies accurate time information. A method in a terminal device that performs data synchronization with a first terminal device,
A time information acquisition step of acquiring time information from the first terminal device;
A time difference between the time information acquired by the time information acquisition step and the time information possessed by the terminal device is obtained, and the first terminal of the data stored in the terminal device is obtained using the time difference. An update time recording step for recording the update time of the corresponding data updated since the time when the time information was last acquired from the device;
Data for comparing the update time recorded in the update time recording step with the update time of the data stored in the first terminal device, and updating the corresponding data in the terminal device to the latest update time data Synchronous processing steps;
A time information recording step of recording time information after the corresponding data in the terminal device is updated to data of the latest update time by the data synchronization processing step. The method of claim 9, wherein
A time information acquisition determination step for determining whether accurate time information can be acquired,
In the time information acquisition step, the time information is acquired from the first terminal device when it is determined in the time information acquisition determination step that accurate time information cannot be acquired. A method in a terminal device that performs data synchronization with a second terminal device,
The second terminal device acquires time information from the terminal device, obtains a time difference between the time information and time information of the second terminal device, and uses the time difference to Among the data stored in the terminal device, the update time of the data updated after the time when the time information was previously acquired from the terminal device is recorded, and the recorded update time and the stored time information are stored in the terminal device. Compare the data update time, update the corresponding data in the second terminal device to the latest update time data,
The terminal device
A time information acquisition step of acquiring time information;
A time information notifying step for notifying time information in response to a request for time information from the second terminal device;
Data for comparing the update time of the data stored in the second terminal device with the update time of the data stored in the terminal device, and updating the corresponding data in the terminal device to the data of the latest update time A method comprising: a synchronization processing step. The method of claim 1, wherein
The second terminal device determines whether accurate time information can be acquired, and when determining that the accurate time information cannot be acquired, acquires accurate time information from the terminal device,
In the time information acquisition step, accurate time information is acquired,
In the time information notifying step, accurate time information is notified.

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