TWI400623B - Remote computer synchronous transmission technology - Google Patents

Description

Remote computer synchronous transmission file technology

The present invention relates to a remote data processing device synchronous transmission file technology, and more particularly to a method for synchronizing data changes in two or more data processing devices in a network system. The data processing device transmits the file technology synchronously.

With the development of science and technology and the formation of global villages, data transmission technology has significantly affected people's lives and work. At present, the commonly used network data transmission technologies are, for example, MSN, e-mail, and network neighbors. People often use the above data transmission system to achieve the purpose of data transmission. But the first two (MSN and e-mail) have file size restrictions, while the last one (network neighbor) has space limitations. When it is necessary to transfer large amounts of data to a remote location (for example, abroad), people use a flash drive to achieve data transmission.

However, with the internationalization of various industries, people often travel because of work, which causes frequent replacement of work places. In addition, the current work style has changed from the individual independent work done in the past to the current group cooperation mode. It is combined with the power of many people, and as a result, the data transmission technology of the past has been unable to meet the current data transmission needs. The disadvantages of using the portable information to carry information on the flash drive are as follows. First, it is impossible to modify the file on multiple data processing devices at the same time. In addition, each time the work location is changed, the modified file needs to be stored once again, thereby increasing the chance of file loss. It can't continue the work in progress or need to contact the local colleagues to help, which will greatly affect the work schedule and even the work stoppage. Therefore, a more efficient remote file processing device transmission file technology is needed to meet the needs of today's society.

The invention overcomes the above disadvantages by the purpose of synchronous transmission of file technology by the remote data processing device to achieve the purpose of synchronizing data transmission data.

It is an object of the present invention to provide a remote data synchronous transmission technique for achieving synchronous changes in data changes in two or more data processing devices within a network system.

The invention automatically monitors each other's data changes in two or more data processing devices in a remote data synchronous transmission system, and further synchronizes the same network in a manner in which the data processing device generates data changes. The data generated in two or more data processing devices in the road system changes. The data processing device in the network system includes a search unit, a data set, an index, an index capture unit, a comparison unit, a monitoring unit, and a synchronization unit. Each time the data processing device is turned on, its search unit searches for other data processing devices in the same network system that are to be synchronized. Then, searching for the data set to be synchronized in the data processing device to be synchronized, and storing the index of the data processing device to find the data change information of the data set, including the data change and the data change time. Next, the comparison unit compares the order of changes of the data to determine the final data change. The synchronization unit then aggregates the contents of the data processing devices. In addition, the time during which the data change occurs in the data processing device can be further matched with a time unit to obtain an objective time basis, and the time sequence of the data change generation is known.

The invention is described in the following by means of the preferred embodiments in which the specific structures, steps or configurations are referred to for the purpose of illustration.

The present invention provides a remote data synchronization transmission system 200 for use in a network system (e.g., an internet, an internal network, or a regional network), wherein the remote data is schematically illustrated in FIG. The isochronous transmission system 200 includes at least two data processing devices. In this embodiment, the data processing device may be any device capable of data transmission, such as a computer, a PDA, or a mobile phone. By means of the remote data synchronization transmission system 200, the data processing device in the network system can synchronously generate data changes, thereby achieving synchronization of all data processing devices in the remote data synchronization transmission system 200. The double arrow of the two connected data processing devices in FIG. 1 indicates that the data processing devices in the network system can be synchronized with each other, so that the data processing device can be a local data processing device or a target data processing device. When the data processing device is synchronized, it plays the role of synchronizing with other data processing devices, or it plays the role of being synchronized by other data processing devices.

2a schematically shows a component relationship diagram between the local data processing device 201 and the target data processing device 202 in the network system. This embodiment simplifies the relationship between a plurality of data processing devices to include synchronization between a local data processing device 201 and a target data processing device 202. It should be noted that the local data processing device 201 and the target data processing device 202 in this embodiment are not specific data processing devices, but are actively and passively distinguished according to the synchronization process. For example, the data processing device that is actively synchronized with other data processing devices in the same network system in the network system is the local data processing device 201, and the local network system is excluded from the local data processing device 201. One or more data processing devices that are searched for and monitored by data changes are referred to as target data processing devices 202.

The local data processing device 201 includes a search unit 203, a monitoring unit 206, a list 204, an index capture unit 207, a comparison unit 209, a local synchronization unit 210, a local setting unit 212, and a copy. Machine index 215, and a local data set 214. In addition, the target data processing device 202 in the same network system includes a target synchronization unit 205, a target setting unit 208, a target data set 217, and a target index 213. In addition, the remote data synchronization transmission system 200 preferably stores an identification (for example, an account corresponding to a network address) in the target data processing device 202 for use as a network location identification. The search of the machine data processing device 201 within the network system. The target index 213 in the target data processing device 202 records all the data changes of the target data set 217 in the target data processing device 202 and the generation time of the data changes for the search unit 203 of the local data processing device 201 to search and index. The fetch unit 207 retrieves and compares by the comparison unit 209. The local index 215 and the target index 213 may be, for example, one of the logs in the operating system; and the index extracting unit 207 may be, for example, a fopen() function with a fread() function. To achieve. The list 204 is included in the search unit 203 and can be achieved by storing a database of one of the account numbers and passwords of other data processing devices in the same network system. The comparison unit 209 can be implemented by a comparison function (for example, a string comparison function, a comparison operator, or a sort function ( sort() )). The local synchronization unit 210 and the target synchronization unit 205 can be implemented by a program function (for example, the dba_sync() function in a Unix system). The local setting unit 212 and the target setting unit 208 can be realized by a program function that can establish a configuration file.

In addition, the local setting unit 212 is configured to set a local data set 214 in the local data processing device 201 that is to be synchronized with the target data set 217 of the target data processing device 202 (in this embodiment, the local data set 214 And the target data collection 217 can be a collection of folders, files, or any other type of material). The local setting unit 212 can set more than one local data set 214 to be synchronized with the target data set 217 of the plurality of target data processing devices 202. After the local data processing device 201 searches for all the data changes of the target data set 217 of the target data processing device 202, a data change is automatically generated in the local data set 214 of the local data processing device 201. The target setting unit 208 is configured to set a target data set 217 in the target data processing device 202 that is to be synchronized with the local data set 214 of the local data processing device 201 (in this embodiment, the local data set 214 and the target data set) 217 can be a collection of folders, files or any other type of material). Similarly, the target setting unit 208 of the target material processing device 202 can set more than one target data set 217 to be synchronized with the native data set 214 of the plurality of local data processing devices 201. The definition of the local data set 214 and the target data set 217 is the same as the definition of the native data processing system 201 and the target data processing system 202 described above.

In addition, as shown in FIG. 2b, in other specific embodiments, the remote data synchronization transmission system 200 may further include a timing unit 218 for converting the time of data change in the network system to obtain an objective time. Basis, used to compare the timing of data changes. The timing unit 218 is independent of a third party device (for example, a server or other data communication management device) outside the data processing device to obtain an objective comparison standard. The function of the timing unit can be achieved by a program function or by a timing function of a basic input/output system (BIOS), and with a timestamp.

The manner in which this remote data processing device transmission system 200 operates will be further described below. Before the remote data processing device synchronizes the transmission, the user sets the local data set 214 to be synchronized with the target data set 217 of the target data processing device 202 via the local setting unit 212 in the local data processing device 201. The user at the end of the target data processing device 202 sets the target data set 217 to be synchronized with the local data processing device 201 via the target setting unit 208.

As shown in FIG. 2a, the search unit 203 of the local data processing device 201 includes a list 204. The search unit 203 can be implemented by a program or a signal transmission. FIG. 2c illustrates an exemplary list 204. The list 204 includes two basic fields, one of which is a field for inputting the name of the target data processing device to be synchronized, and the other field is for input. The field for accessing the password of the target data processing device is to be synchronized. A user may fill in the identification of the target data processing device 202 in a field for inputting the name of the target data processing device 202 to be synchronized (for example, an account number or a pair name resolution protocol (PNRP)) And accessing the access code of each target data processing device 202 in the access password field, so that each time the synchronization action is to be generated, the search unit 203 of the local data processing device 201 directly inputs the access password, thereby achieving The connection of the target data processing device 202. The search unit 203 in a local data processing device 201 in a network system searches for the target processing system 202 in the same network system according to the user's establishment of the list 204 included in the search unit 203. In the foregoing, the list 204 includes an identification (eg, an account number) of the target processing system 202 in the same network system, which is identified as a name of the target data processing device 202 in the network system (eg, PNRP, That is, the Peer Name Resolution Protocol (Peer Name Resolution Protocol), the identification corresponds to a network location (for example, an IP address), so that the user of the local data processing device 201 can identify the search target data processing device 202 The location of the network in the network system. The account number can be obtained automatically by the local data processing device 201 or manually by the user. After the local data processing device 201 searches for the target material processing device 202, the target data processing device 202 proposes an access password request to confirm that the native data processing device 201 has access rights. FIG. 3 is a schematic diagram showing a summary flow of the data processing device 201 for searching the target data processing device 202 and generating a data change for the local data set.

FIG. 4 schematically illustrates a window in which the data processing device 202 proposes an access password request. In other embodiments, the access password may be stored in the list 204 of the local data processing device 201 as described above, and automatically input when the target data processing device 202 requests the access password, so that the user does not need to remember The access code of the target data processing device 202 is stored, and the target data set 217 of the target data processing device 202 is directly accessed. After confirming that the local data processing device 201 has the access authority, the searching unit 203 of the local data processing device 201 further finds the local data set set by the user in the target data processing device 202 to be the local data processing device 201. 214 Synchronized target data set 217 and target index 213 for recording all data changes of this target data set 217. Then, after searching for the target index 213, the search unit 203 of the local data processing device 201 transmits the record of the target index 213 to the index extraction unit 207 in the local data processing device 201 to capture all the targets in the target index 213. Information about the change information of the target data set 217 and the time when the data was changed.

The data change time of the target index 213 is generated before the data change information and the data change time information about the target data set 217 in the target index 213 of the target data processing device 202 are transmitted back to the local data processing device 201. The information may be converted by the comparison unit 209 after the local data processing device 201, or may be converted by the timing unit 218 further included in the remote data processing device transmission system 200 as shown in FIG. 2b to be able to communicate with the local device. The data change record in index 215 has an objective time comparison basis. The timing unit 218 can be included in one of the third party communication devices of any communication management device (for example, a base station or a server) to obtain a unified objective time comparison basis. For example, the local data processing device 201 and the target data processing device 202 may be in different time zones, such that the time settings of the local data processing device 201 and the target data processing device 202 are greatly different, so an objective is required. The third-party timing unit 218 converts the generation time of all the data changes regarding the target data set 217 recorded by the target index 213 in the target data processing device 202, so that it can be recorded with the local index 215 recorded in the local data processing device 201. The generation time of the data change regarding the local data set 214 is objectively compared.

At the same time, the index retrieval unit 207 also retrieves all the data change information about the local data set 214 and the generation time of the data change from the local index 215 of the local data processing device 201. Then, the index extraction unit 207 transmits the data change time information extracted from the local index 215 and the data change time information extracted from the target index 213 to the comparison unit 209 in the local data processing device 201. Next, the comparing unit 209 in the local data processing device 201 compares all the records about the target data set 214 recorded in the local index 215 with the target data set 214 and the target index 215 to find the local data. After the previous shutdown of the data processing device 201, the data changes in the local data set 214 and the target data set 214 are sequentially generated. Then, the comparison result is transmitted to the local synchronization unit 212, so that the local data set 214 of the local data processing device 201 generates a data change according to the comparison result to achieve the target data set 217 with the target data processing device 202. The purpose of synchronization. Wherein, when the comparing unit 209 of the local data processing device 201 compares and finds the same data, after the local data processing device 201 is turned off for the previous time, when the target data set 217 of the target data processing device 202 has more than one data change. The comparison unit 209 of the local data processing device 201 displays a confirmation request, via the user's selection, to confirm the change of the data to be retained. Wherein, the comparison unit 209 can be achieved by a function for comparison.

FIG. 5 is a schematic diagram showing the comparison unit 209 when the comparison result of the comparison unit 209 of the local data processing device 201 finds that one or more data has changed more than once after the previous data processing device 201 is turned off. Displaying a selected directory listing all the data processing devices having more than one data change after the previous shutdown of the local data processing device 201, the data processing device name for which the data changes, and each data change The time is generated for the user to select. The generation time of the data change can be more accurate to the second as shown in Fig. 5, in order to obtain a more accurate comparison of the time of data change generation. In addition, when both the local data processing device 201 and the target data processing device 202 are in the power-on state, the local data processing device 201 includes a monitoring unit 206 for monitoring the target index 213 of the target data processing device 202 and the local device at any time. The local index 215 of the data processing device 201. When any one of the local index 215 or the target index 213 generates a change in the data about the local data set 214 or the target data set 217, the monitoring unit 206 of the local data processing apparatus 201 transmits the data change to the index capture unit. 207, in order to retrieve information of the data change, and then transmit the data change information to the comparison unit 209 to compare the generation time of the data change, and then transmit the comparison result to the local synchronization unit 210 and the target synchronization unit 205, and then The local synchronization unit 210 and the target synchronization unit 205 respectively generate corresponding data changes in the local data set 214 of the local data processing device 201 and the target data set 217 of the target data processing device 202 to achieve local data. The local data set 214 of the processing device 201 is synchronized with the target data set 217 of the target data processing device 202.

FIG. 6 is a flow chart showing synchronization of the remote data synchronization transmission system 200. First, the step 601 includes setting the data set. Before the action of the synchronization is officially started, the user of the local data processing device 201 and the user of the target data processing device 202 need to first use the local setting unit 212 and the target setting unit 208. Set the collection of data to be used for synchronization. In the preferred embodiment, the set of data in the local data processing device 201 that is to be used for synchronization with the target data processing device 202 is referred to as the local data set 214, and the target data processing device 202 is intended to be used with the local data. The set of data synchronized by the processing device 201 is referred to as a target data set 217. Then, the formal synchronization action is started. The first step of the synchronization action is step 602, searching for the data processing device and the index. The search unit 203 of the local data processing device 201 searches for the network location of the target data processing device 202 to be synchronized in the network system, wherein the search unit 203 is included therein for storing a corresponding network. The account location or a list of network addresses 204 is searched for. After the local data processing device 201 searches for the target data processing device 202, the target data processing device 202 proposes whether or not the local target data processing device 201 has access authority.

After the target data processing device 202 gives the access authority, the search unit 203 of the local data processing device 201 further searches the target index 213 in the target data processing device 202, and records the data recorded by the target index 213 back to the local device. The index extracting unit 207 of the data processing device 201 starts the indexing step 207, wherein the index capturing unit 207 of the local data processing device 201 retrieves all the data change information related to the target data set 217 in the target index 213. And the data change generation time, and further transmit the information to the comparison unit 209. Further, the process proceeds to step 604 to compare the information of the index record, and the comparing unit 209 of the local data processing device 201 compares the received data changes to find out the data change generated by the local data processing device 201 after the previous shutdown, and discharges the data. The order of data changes. Wherein, when the comparing unit 209 of the local data processing device 201 finds that the same data has more than one change of data, an inquiry is made for the user to select the version of the data to be retained. The user can select one or more versions to be retained. Then, the comparison information is transmitted to the local synchronization unit 210 to perform the step 605 to generate corresponding data changes, so that the preliminary synchronization can be achieved.

After the initial synchronization is achieved, the local data processing device 201 continuously monitors the local index 215 of the local data processing device 202 and the target index 213 of the target data processing device 202 for synchronization purposes. Therefore, after the initial synchronization is achieved, the monitoring unit 206 of the local data processing device 201 performs the step 606 monitoring index, and the monitoring unit 206 of the local data processing device 201 monitors the local index 215 and the target index 213, when the local index When either 215 or the target index 213 generates a new data change, the monitoring unit 206 transmits the information to the index extraction unit 207 to perform step 607 to retrieve the index change monitored. This step captures the data change recorded by the local index 215 or the target index 216, and then transmits the captured data change information to the comparing unit 209, performs the comparison action as described above, and transmits the comparison result. To the local synchronization unit 210, the local synchronization unit 210 then proceeds to step 609 to generate a corresponding data change. The local synchronization unit 210 generates a corresponding data change for the local data set 214 and the target data set 217 according to the obtained data change information, and the synchronization of step 610 can be completed.

While the invention has been described above by way of illustration and example, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope is subject to the definition of the scope of the patent application attached.

201. . . Local data processing device

202. . . Target data processing device

203. . . Search unit

204. . . List

205. . . Target synchronization unit

206. . . Monitoring unit

207. . . Index capture unit

208. . . Target setting unit

209. . . Comparison unit

210. . . Local synchronization unit

212. . . Local setting unit

213. . . Target index

214. . . Native data collection

215. . . Native index

217. . . Target data collection

218. . . Timing unit

Figure 1 schematically illustrates the remote data synchronous transmission system.

FIG. 2a schematically illustrates the component relationship between the local data processing device and the target data processing device in the remote data synchronous transmission system.

FIG. 2b schematically illustrates the component relationship between the local data processing device and the target data processing device in the remote data synchronous transmission system further including a timing unit.

Figure 2c schematically illustrates an exemplary list of accounts.

FIG. 3 schematically shows the data transmission process of the remote data synchronous transmission system.

Figure 4 schematically illustrates a list of exemplary access cryptographic requirements.

FIG. 5 schematically illustrates an exemplary selection list.

Figure 6 is a flow chart of synchronization of this remote data synchronous transmission system.

201. . . Local data processing device

202. . . Target data processing device

203. . . Search unit

204. . . List

205. . . Target synchronization unit

206. . . Monitoring unit

207. . . Index capture unit

208. . . Target setting unit

209. . . Comparison unit

210. . . Local synchronization unit

212. . . Local setting unit

213. . . Target index

214. . . Native data collection

215. . . Native index

217. . . Target data collection

218. . . Timing unit

Claims (35)

A remote data synchronous transmission system for use in a network system, comprising: a target data processing device, comprising a target data set, a target index, and a target setting unit, wherein the target index is used for recording target data processing All data changes in the device; and a local data processing device comprising: a local data set, which is a data set for synchronizing with the target data set; and a local index for recording the local data processing device All of the data changes; a comparison unit that records the data change record of the target data set recorded in the target index from the target data processing device and the data change record of the local data set recorded by the local index Comparing to find out the sequence of the local data collection and the data generation in the target data set; and a local synchronization unit, after the comparison unit compares the data changes, according to the comparison unit Synchronizing the local data set with the content of the target data set after the sequence; wherein, the target For a given cell is set to this local data processing means of the local data collection of synchronization target data in the target set of data processing apparatus. The remote data synchronous transmission system of claim 1, wherein the local data processing device further comprises a search unit for searching for a target data processing device in the network system and a target included in the target data processing device Data collection. The remote data synchronous transmission system of claim 1, wherein the local data processing device further comprises an index capture unit for extracting the target index from the target data processing device. The remote data synchronous transmission system of claim 1, wherein the target index is used to record all data changes in the target data processing device. The remote data synchronous transmission system of claim 1, wherein the target data processing device further comprises a target synchronization unit that collects the target data and the local data after receiving the comparison information of the comparison unit change data The content of the collection is synchronized. The remote data synchronous transmission system of claim 1, wherein the target data processing device obtains an identification via registration, wherein the identification corresponds to a location of the target data processing device in the network system, and the target data processing device is Manually set to get an access code. The remote data synchronous transmission system of claim 6, wherein the target data processing device stores the identification and the access password in a data set of the target data processing device. The remote data synchronous transmission system of claim 2, wherein the search unit includes a list for identification by the input target data processing device. The remote data synchronous transmission system of claim 8, wherein the target data processing device to be synchronized further generates an access password request after receiving the search of the local data processing device, as determining whether to grant access rights. in accordance with. The remote data synchronization transmission system of claim 9, wherein the local data processing device further comprises an index extraction unit for extracting the target index from the target data processing device; wherein the access authority is obtained After the local data The search unit of the processing device searches for the target data set set to be synchronized in the target data processing device, and captures an index in the data set of the target data processing device by the index extraction unit, and finds the In the target data processing device, the setting is the data change in the target data set to be synchronized. The remote data synchronous transmission system of claim 1, wherein the local data processing device further comprises a local setting unit that sets a target to be associated with the target data processing device in the local data processing device The collection of native data synchronized by the data collection. The remote data synchronous transmission system of claim 11, wherein the comparing unit of the local data processing device records the data change information and the data change time recorded by the index of the local data set, and the data recorded by the index of the target data set Change information and data change time to compare. The remote data synchronous transmission system of claim 12, wherein the comparing unit transmits the compared result to the local synchronization unit and one of the target data processing devices, and the local synchronization unit Based on the result of the comparison, a data change is generated for the local data set. The remote data synchronous transmission system of claim 13, wherein the local synchronization unit of the local data processing device is based on the data change information generated by the target data processing device after the previous local data processing device is turned off, and the local data is A data set set in the processing device to be synchronized generates a data change. The remote data synchronous transmission system of claim 14, wherein the same data in the target data processing system corresponding to the target data set is synchronized, and the data processing system has more than one data change record after the previous shutdown of the local data processing system. Time to this The machine data processing device proposes a confirmation request to determine the version or all versions to be retained. The remote data synchronous transmission system of claim 1 may further comprise a timing unit that converts the time of the data change monitored by the target data processing device. The remote data synchronous transmission system of claim 16, wherein the timing unit comprises a device independent of the local data processing device and the target data processing device. The remote data synchronous transmission system of claim 17, wherein the local data processing device further comprises an index capture unit for extracting the target index from the target data processing device; wherein, when the local data processing The indexing unit of the device passes through the timing unit when the target index is retrieved from the target data processing device. The remote data synchronization transmission system of claim 18, wherein the index acquisition unit retrieves the data change generation time of the converted target index record and transmits the data to the comparison unit. The remote data synchronous transmission system of claim 1, further comprising a monitoring unit, wherein the monitoring unit monitors a data change record of the index of the target data set in the target data processing device. The remote data synchronization transmission system of claim 20, wherein the local data processing device further comprises an index capture unit for extracting the target index from the target data processing device; wherein the monitoring unit When the target index of the target data set or the local index of the local data set monitors the updated data change, the data change information is transmitted to the index capture unit. The remote data synchronous transmission system of claim 21, wherein the target data processing device further comprises a target synchronization unit that collects the target data and the local data after receiving the comparison information of the comparison unit change data Synchronizing the content of the collection; wherein the index retrieval unit transmits the data change information of the local data set and the target data set to the comparison unit for comparison, and the comparison unit further transmits the compared information to the The local synchronization unit and the target synchronization unit synchronize the data of the local data collection with the data of the target data collection. A remote data synchronous transmission method includes the following steps: searching a target data processing device in a network system and a target data set included in the target data processing device by a local data processing device to obtain an identification And accessing the password, and searching for the target data set and the target index set in the target data processing device to be synchronized; and extracting the index data from the target data processing device by one of the local data processing devices a target index; comparing the data change record recorded in the target index with a data change record of the local data set recorded by one of the local data sets; and changing the result according to the comparison data Synchronizing the native data collection with the content of the target data collection. The remote data synchronous transmission method of claim 23, wherein the searching step comprises searching for the target data processing device in the network system by the identification corresponding to a network location of a target data processing device. The remote data synchronous transmission method of claim 24, wherein after the searching step searches for the target data processing device, the target data processing device proposes an access password request to determine whether to grant access rights. The remote data synchronous transmission method of claim 25, wherein the index capture step captures the target index record to obtain data change information of the target data set and a time when the data change occurs. For the remote data synchronous transmission method of claim 26, the searching step may further convert the data change generation time by a timing unit to compare with the data change generation time of the local data set recorded in the local index. In the remote data synchronous transmission method of claim 27, the indexing step is performed to transmit the converted data change generation time to a comparison unit of the local data processing device for comparison of data changes and subsequent changes of the data. . For the remote data synchronous transmission method of claim 26, the comparing step further comprises comparing, by a comparing unit, a sequence of data change generation times of the local data set and the target data set. In the remote data synchronous transmission method of claim 29, the comparing step further comprises transmitting the comparison result to a local synchronization unit and a target synchronization unit in the target data processing device. The remote data synchronous transmission method of claim 30, wherein the synchronization step generates a corresponding data change by the synchronization unit to synchronize the local data set with the target data set. The remote data synchronous transmission method of claim 31, wherein if the same data is found in the comparison step, the local data processing device is turned off more than once before When the data changes the record, a confirmation request is made to determine the version or all versions to be retained. The remote data synchronous transmission method of claim 32, further comprising a monitoring step, after the first synchronization of the local data processing device after the startup of the local data processing device, further monitoring the local device by a monitoring unit Index and the target index. For the remote data synchronous transmission method of claim 33, in the monitoring step, when the monitoring unit monitors any data change from the target index or the local index, the data change information is transmitted to the index extraction unit. For the remote data synchronous transmission method of claim 34, in the indexing step, the data change information of the local data set or the target data set retrieved from the local index or the target index is further transmitted to the comparison unit. Comparing, in the comparing step, the comparing unit further transmits the comparison result to the local synchronization unit and the target synchronization unit to generate corresponding data changes in the local data set and the target data set, thereby achieving data synchronization The purpose of the transformation.