106 results about "Bilateral synchronization" patented technology

A technology for bi-directional synchronization between at least two entities. Examples of entities include databases, operating system files, applications, email, etc. The two entities can communicate using any appropriate protocol and the two entities can be provided by different vendors using different designs. The synchronization technology includes an Application Programming Interface that enables developers to provide synchronization functionality as an integral part of their distributed applications. Additionally, conflict resolution during synchronization can be customized to suit the particular application. The synchronization technology allows for the management of data anywhere and enables developers to distribute application data and code across multiple tiered environments to applications and users located anywhere.

A system and method for retrieving media data from a portable media device for storage on a client computer during synchronization between the portable media device and the client computer. A media player application (MPA) identifies media data on the portable media device that has been modified since a last synchronization process, and automatically or selectively retrieves the modified and / or unmodified media data from the portable media device for storage on the client computer.

The invention belongs to the technical field of data synchronism, and particularly discloses a data synchronism ETL (Extract Transform Load) system. The data synchronism ETL system comprises the following function modules: a context parameter configuration module, a synchronous interface definition module, a synchronous script generation module, a workflow configuration module, a data synchronism core module and a log and prewarning module, wherein the context parameter configuration module, the synchronous interface definition module and the synchronous script generation module are basic modules and are operated according to the sequence of the modules to generate a script; the workflow configuration module mainly plays the role of a dispatching center, and configures the script in a workflow to realize parallel or serial execution, parallel progress amount, and what time or condition a task is triggered; when anomaly or an error task occurs in the execution steps, the log and prewarning module captures an error reason, and informs system management personnel of the error reason. The data synchronism ETL system is provided with a bidirectional synchronism mechanism, and is capable of supporting data sources configured with multiple context names and accessing multiple environments, the coverage of the synchronism method is wide, meanwhile, a complicated user-defined synchronism method is supported, and the expansibility is stronger.

The invention discloses a message exchange method between mobile phone and network server, for resolving the information safety of mobile phone, wherein user can on-time backup mobile phone information into a network server and synchronously refresh, or download backup information from the server, user can selectively send and receive at least one information item to be set as automatic exchange. The inventive method comprises that user registers on a network server, sets backup or recover information items, and relative parameters on mobile phone, mobile phone can exchange message automatically with the network server. Via the invention, user can on-time backup important information of mobile phone in a network server, to be synchronized bidirectional via the system, to confirm the on-time refresh of user information and provide reliable technique support for the safety of mobile phone information.

The device includes receiving and retransmitting radio signal emitted from base station and terminal equipment by transceiving antenna, picking up synchronous control information from radio signal ofthe base station by synchronous picking up and detecting control unit to control synchronous retransmitting and to carry out fault minitoring from frequency selective-radio frequency amplifier circuit to two-way receiving signal. The present invention does not need time delay for the received signal so not only synchronous retransmitting of two-way receiving signal can be realized but also detecting function of system fault can be executed.

A time synchronization system comprises a GPS (Global Positioning System) receiver for receiving a time signal from a Global Positioning System (GPS), and outputting a UTC (Universal Time Coordinated) synchronization reference signal synchronizing with UTC and a UTC synchronization absolute time signal, and a time signal distributor for generating a reference time signal synchronizing with UTC from the synchronization reference signal and the absolute time signal, and transmits this reference time signal in distribution to a plurality of distributed control oriented terminal devices. The time synchronization between the plurality of distributed control oriented terminal devices can be thereby taken.

The invention provides a universal multi-source heterogeneous large-scale data system. The system comprises a synchronous network planning management unit, an installation configuration unit, a blockassembly line processing unit, a one-way synchronizing unit, a two-way synchronizing unit and a synchronous correctness guaranteeing unit. The system works on a node database layer and on a middle layer below an application logic layer. In the data synchronizing process, a client transmits captured local change information to a server according to a synchronizing task plan; the server receives thechange information and transmits the change information to an asynchronous parallel information processing mechanism to store the change information in a corresponding information queue; the server polls the local information queues to read the to-be-processed change information, and then carries out subsequent data change according to an heterogeneous data mapping rule so as to maintain the consistency of synchronous data of a source data copy and synchronous data of a target data copy. The system independently runs parallel to a synchronous node local application, and provides a relaxationaffair guarantee mechanism of internet distributed multi-source heterogeneous data synchronization by means of loose coupling coordination.

The invention provides a phase synchronization method for a satellite-bone double-base SAR system based on two-way synchronization. When the system works in phase synchronization mode, a double star synchronous clock unit provides high-precision time synchronization information, reference second pulse signal and high-precision reference frequency source for the system. The phase synchronization method comprises the following steps of: S1, a transmitting star transmits a phase synchronization pulse signal through a synchronous antenna, the phase synchronization pulse signal is received by a receiving star, and the receiving star obtains an intermediate frequency signal by frequency mixing, and performs A / D conversion and FFT spectrum analysis to extract a carrier phase difference of the transmitting end; S2, after receiving the phase synchronization pulse signal of the transmitting star, the receiving star transmits the phase synchronization pulse signal through the synchronous antenna,and the phase synchronization pulse signal is received by the transmitting star after the system delay, and the transmitting star obtains the intermediate frequency signal by the frequency mixing, and performs the A / D conversion and the FFT spectrum analysis to extract the carrier phase difference of the receiving end; and S3, the transmitting star and the receiving star transmit the respective carrier phase difference to the ground, and after performing the difference, the carrier phase difference can be used as an echo phase compensation value to compensate for the received star echo signalto complete phase synchronization.

A system and method for efficiently performing memory intensive computations including a bidirectional synchronization mechanism for maintaining consistency of data on which computations will be performed. This can be used to solve various problems such as those in a business context. Synchronization occurs in a near-real-time fashion between data in a database and data stored in memory. The synchronization is accomplished by periodically scanning the database to see if any data has changed. If any data has changed, the changes are copied over to memory so that the data in memory is current. This update is accomplished without copying the entire database into memory each time data in the database changes.

The invention relates to a time synchronization method based on a double ring bus; the method comprises the following steps: initializes master / slave equipment; the master equipment packages a sending time to synchronization messages sent to the adjacent slave equipment; the slave equipment i stores a synchronization message, coming from a loop, receiving time ti and packages a synchronization message sending time ti' into the synchronization message sent to the slave equipment i+1, and the slave equipment i+1 stores a synchronization message receiving time ti+1; simultaneously in another loop, the slave equipment i+1 sends another synchronization message, going to the slave equipment i, sending time si+1 and the time ti+1 to the slave equipment i through the synchronization message; the slave equipment i saves the message receiving time si; the slave equipment i calculates a clock deviation amount and communication delay between the slave equipment i and the slave equipment i+1, and corrects a local clock, thereby completing time synchronization of the double ring bus master / slave equipment. The synchronization message can be simultaneously sent a transmission line, and the synchronization can be completed in one communication period, thereby effectively improving instantaneity; and synchronization efficiency is high.

The invention discloses a method for synchronizing two-way time of a wireless sensor network. The method is a two-way synchronizing method based on a transmitter and a receiver. A sensing node is synchronized to a clock of a reference node. Physical layer time scale recording technology and time scale embedding technology are used and the recording, the embedding, and transmitting / receiving of a time scale is completed in the same message. As a result, when a transmitter-receiver two-way synchronizing algorithm is carried out in a network, the influences of six factors, including send time delay, access time delay, transmission time delay, propagation time delay, reception time delay, and receive time delay, are eliminated theoretically in a synchronizing process such that high synchronizing precision is obtained. Further, the method achieves self-adaptive skew compensation on this basis and verifies the algorithm in a ZigBee network experiment test. An acquired result complies with an expectation.

The present invention is related to a method and a system for bidirectional synchronisation of information between two devices, a first device and a second device where the synchronisation is limited to exchange of modified data and the request for synchronization can be initiated by any of the two devices. The synchronisation is of an incremental type adapted to synchronize items making references / couplings to other items.

The invention provides an infrared anti-theft device, which comprises a transmitting terminal and a receiving terminal. In the technical scheme, the transmitting terminal and the receiving terminal both comprise a list predefined with a plurality of fundamental frequencies; and each fundamental frequency is arrayed in the list according to a predefined procedure. The method for automatically transforming modulating frequency for the infrared anti-theft device, provided by the invention, comprises the following steps: defining the working frequency and the encoding rule of the infrared beam by the transmitting terminal or the receiving terminal; and performing the two-way synchronous communication between the transmitting terminal and the receiving terminal, and judging the operation environment and determining whether the modulating frequency is to be automatically changed by the receiving terminal. The invention can automatically choose the appropriate fundamental frequency with the receiving of the same fundamental-frequency disturbing signal, thereby ensuring the normal operation of the system under the condition of concentrated installation of the device and improving the reliability and practicality of the device or even the system.

A method and apparatus for time synchronization (TS) method using GPS information in a communication system synchronizing the time of slave nodes, which do not have a GPS receiver, by using GPS information of a node having a GPS receiver. The method includes the steps of extracting 1PPS, TOD, 1PPS_en, and clocks using GPS signals by a grand master node having a GPS receiver, stabilizing the signals, generating a sync message for TS, and transmitting the sync message to a slave node; receiving the sync message by the slave node and conducting a TS operation using OFCC synchronization technology extracting 1PPS, TOD, and 1PPS_en signals using the modified TOD information by the block and delivering to a stabilization block of the slave node for stabilization; and redelivering to the TS block to update TOD information and generate a sync message for TS of a second slave node.

An XM radio system, a browser plug-in for bidirectional communication in the XM radio system, and method for bidirectional communication between an XM radio receiver, a first computing device and a second computing device is provided. The XM radio system includes an XM radio receiver communicatively connected to a first computing device, a second computing device communicatively connected to the first computing device and a computer program stored on the first computing device. Unresolved bookmarks are transferred from the first computing device to second computing device via the Internet and the resolved bookmarks are bidirectionally communicated from the second computing device to the first computing device via Internet and does not trigger a fire wall.

The application discloses a bidirectional optical-fiber time-frequency synchronization method and system of second pulse signal taming. The method includes the steps of: establishing a bidirectional optical-fiber synchronization link between a master station and a slave station; carrying out coarse synchronization of laser second pulse signals of the master station and the slave station; measuringtime intervals of a local pulse and a received pulse in the master station and the slave station; sending information, which includes time intervals and time stamps of the master station, by the master station to the slave station; and taking one half of a value of difference between time intervals of the master station and the slave station of the same measurement time as clock difference of themaster station and the slave station. The application also provides the system used for the above method. Compared with existing optical-fiber link-based time-frequency synchronization methods, the method of the application has the advantages that link noises can be suppressed, and synchronization accuracy and stability are high.

The invention discloses a hot backup redundancy computer time synchronization system and a method thereof. The system comprises a time monitoring module, a primary timestamp communication calculation module and a secondary timestamp communication calculation module. A primary computer sends a synchronization message to a secondary computer. The synchronization message contains transmission time T1. The time monitoring module monitors whether the transmission time T1 is correct. When the transmission time is correct, the secondary computer receives the synchronization message. After recording the time Ti of receiving the synchronization message, the secondary computer simultaneously sends a response message to the primary computer. The primary computer records the time Ti' of receiving the response message and sends the time Ti' to the secondary computer. The secondary computer calculates time deviation according to T1, Ti and Ti'. The secondary computer corrects the local time based on the time deviation. When the transmission time is not correct, the current primary computer is switched to the secondary computer, and other computer is switched to a primary computer. The method provided by the invention is simple to implement. By the adoption of the system and the method, costs of external independent redundant timing hardware are minimized.

A data management application that may be implemented in a mobile device to perform two-way synchronization of electronic messages and / or PIM data with a server device. The device may be a mobile device such as a mobile phone or Smartphone, as well as a personal digital assistant, notebook computer, or other mobile device communicating using any of several wireless protocols. PIM data may include PIM application objects or other data, including but not limited to calendar, contact, and task object data. The data management application may synchronize e-mail and PIM data on a client device with that of a server where the server and client utilize one or more different protocols.

The invention discloses an extensive makeup language (XML)-based method for synchronously updating increment of spatial data, which is used for establishing a spatial data bidirectional synchronous mechanism, realizing approximate consistency maintenance of multi-copy data, and solving the problems that: according to the common data synchronization method, offline environment is not supported, heterogeneous databases are not supported, and the synchronous object granularity and the synchronous process cannot be freely controlled and the like. Technologies such as NET, XML and the like are used as a basis of implementing the method for synchronously updating the spatial data. The system comprises a changed record collection module, a changed data organization module, a changed data conflict arbitration module and a changed data synchronization module, wherein the four functional modules have synergistic effects of monitoring, organizing and synchronizing the changed data to synchronously update the increment of the spatial data. According to the simple technical implementation method, the spatial data are effectively managed and automatically processed by computers, human-computer interaction is less, the time is saved, the work efficiency is improved, and the method has an extremely wide application prospect in the field of data consistency maintenance.

A method for bi-directional synchronization of user data files between a client and at least one server. The method comprises determining if a match exists between a local session file and a reflection session file, wherein the local session file is maintained by the client and the reflection session is maintained by the at least one server; when the local session file and the reflection session file match, performing: synchronizing contents of a user data file maintained by the client with contents of a user data file maintained by the at least one server, when the user data file in the client includes more records than the user data file in the at least one server; and synchronizing contents of a user data file maintained by the at least one server with contents of a user data file maintained by the client, when the user data file in the client includes less records than the user data file in the at least one server. In accordance with an embodiment of the invention the user data file includes a session file, an index file and a data file.

A method and associated system for an automatically self-learning audit of a bidirectional synchronization means for synchronizing a source system and a target system. A processor identifies a mismatch between an element of production data of the source system and an analogous production-data element of the target system. If the mismatch is caused by an issue known to the synchronization means, the processor takes corrective action known to resolve the mismatch. Otherwise, the processor attempts to identify a resolution and, if successful, applies the resolution, teaches the resolution to the synchronization mechanism, records the solution, and resends data from the correct system to the incorrect system. If unable to identify a resolution, the processor implements a next-best solution that allows continued operation despite the unresolved mismatch. The processor then generates a report of the mismatch and continues searching for other mismatches in the loaded data models.

The invention discloses a master-slave bidirectional synchronous data storage method, which relates to the technical field of data processing. The method comprises the following steps: a DRBD virtualdisk creation step: installing and configuring a DRBD service to each storage service node, and creating a DRBD virtual disk; a node role defining step of installing and configuring Keepalived servicefor each storage service node, marking the storage service node as a master node or a slave node, and defining roles of a DRBD virtual disk as a master DRBD virtual disk and a slave DRBD virtual diskaccording to the node role; a data synchronization step: backing up the data stored in the master DRBD virtual disk to the slave DRBD virtual disk; a Virtual IP management step: assigning an virtualIP address to master node, managing the virtual IP address through Keepalived, keeping the virtual IP address always in surviving master node, when master node is inaccessible, slave nodes will be defined as master nodes automatically. The present invention is intended to provide a master-slave bi-directional synchronization data storage method capable of reducing implementation costs and reducingrequirements for an external communication environment.

A method of synchronizing the operation of a two-way QKD system by sending a sync signal (SC) in only one direction, namely from one QKD station (ALICE) to the other QKD station (BOB). The one-way transmission greatly reduces the amount of light scattering as compared to two-way sync signal transmission. The method includes phase-locking the sync signal at BOB and dithering the timing of the quantum signals so as to operate the QKD system in three different operating states. The number of detected quantum signals is counted for each state for a given number of detector gating signals. The QKD system is then operated in the state associated with the greatest number of detected quantum signals. This method is rapidly repeated during the operation of the QKD system to compensate for timing errors to maintain the system at or near its optimum operating state. The method allows for only having to adjust the timing of a single timed element—namely, the quantum laser—to compensate for timing variations, rather than having to adjust the timing of all or some of the timed elements in the QKD system.

A method and an apparatus for repeating wireless signals bidirectionally and synchronously are provided in the present invention, specially used for repeating wireless signals emitted from the base station and terminal devices bidirectionally and synchronously in the TDD system. Said apparatus comprises: a receiving and transmitting antenna set, a frequency selection and bidirection RF amplication circuit, and a synchronization extraction and control device. Signals emitted from the base station and terminal devices are received and repeated by the receiving and transmitting antenna set. The synchronization control information is extracted from signals emitted from the base station by the synchronization extraction and control device to control the frequency selection and bidirection RF amplication circuit, thereby synchronously repeating signals received bidirectionally. By using the present invention, synchronously repeating signals received bidirectionally can be realized without delaying the time for receiving and transmitting signals, at the same time, a function of monitoring system malfunction can be also provided, thereby ensuring that the system works reliably.

The invention relates to the technical field of data synchronization, in particular to a table-level bidirectional synchronization realization method and system based on a trigger. The method comprises the following steps: source data changes in a current base table are captured; the source data changes are triggered by a synchronization system and / or a common user; source data changes triggered by a dedicated user are filtered out the source data changes triggered by a non-dedicated user is written into a corresponding CDC table; The synchronization system reads records in the CDC table and synchronizes another base table participating in bidirectional synchronization according to the recorded data. The table-level bidirectional synchronization is realized, a special user is created for the synchronization system, corresponding to the special user ID, which is different from the ordinary user, so that the trigger can filter the record according to the user of the current triggering operation, thereby preventing the data change triggered by the synchronization system from being written into the CDC table, thus solving the problem of the cycle triggering of the bidirectional synchronization.

The invention provides a Hbase data online migration method and device. The method includes the steps that from a first moment, data of a first cluster is mirrored to a second cluster; at a second moment after mirroring is ended, bilateral synchronization of the first cluster and the second cluster is started, and updated data of the first cluster and updated data of the second cluster after the second moment are synchronized between the first cluster and the second cluster; updated data of the first cluster in the time period from the first moment to the second moment is copied to the secondcluster. Under the condition that write access of an original cluster is not stopped, data online migration of uninterrupted services is achieved.