33results about How to "Reduce sync delay" patented technology

The invention discloses a centerless TDMA synchronization method suitable for wireless Ad hoc Network, belonging to the technical field of TDMA communication of the wireless Ad hoc Network. The method comprises the steps that a synchronization header is arranged on a distributed signal-sending time slot; a time frame counter is arranged on each node, and a time slot counter is arranged on each time frame of the different nodes; and after any node is started, information is intercepted, and the time frame counter is used for counting, wherein if the synchronization header of another node is received within one time frame, time of the node is synchronized with that of the corresponding node; if the synchronization headers of other nodes are not received, the time slot counter is used for counting; if the synchronization header is received before the next distributed signal-sending time slot, time of the node is synchronized with that of the corresponding node; and otherwise, the synchronization header of the node is sent out in the next distributed signal-sending time slot.

The present invention discloses a method and an apparatus for synchronization in a communication system, the method includes: detecting whether a user equipment is in an uplink out-of-synchronization state; triggering, by a downlink scheduling entity, an uplink enhanced random access synchronization process, if the user equipment is in the uplink out-of-synchronization state; and obtaining, by an uplink scheduling entity, a user equipment identifier sent by the user equipment on which the uplink enhanced random access synchronization process is triggered, and informing the downlink scheduling entity via an interaction with the downlink scheduling entity that uplink synchronization of the user equipment is restored. By employing the method and the apparatus of the invention, the uplink synchronization is accomplished by using the existing enhanced random access technology of the current system and via the interaction between the uplink and downlink scheduling entities, the delay of the synchronization may be shortened effectively, the data transmission efficiency and the system resource utilization are improved, and the normal sending and transmitting of the downlink data may be guaranteed.

A method for synchronizing a CDMA receiver to a transmitter when an adaptive antenna is utilized to receive transmitted data, wherein a receiving antenna system is adapted between a 360° reception angle pattern (i.e., an omni-directional pattern) and a fixed reception angle (i.e., a directional pattern) by permitting the receiver to identify a pilot signal having the largest magnitude. The receiver minimizes interference from other pilot signals by steering antenna pattern nulls toward other transmitters. As a result, the time required for the receiver to acquire a valid pilot signal is significantly reduced.

The invention relates to a method and device for synchronizing service data. The method comprises the steps of: synchronizing Mysql data serving as the service data to a Kafka cluster through a Maxwell assembly; synchronizing the data in the Kafka cluster to the HBase; and mapping the table stored in the HBase to a Hive library to finish the synchronization of the service data. According to the scheme of the invention, a Maxwell synchronization mode is adopted, no influence is caused to the running service, the delay is lower, more concurrency can be supported, and the flexibility is better.

The invention discloses a cloud computing-oriented high-performance block chain architecture method, which comprises a cloud computing-oriented block chain network architecture and a cloud computing-oriented block chain system architecture; wherein according to the cloud computing-oriented block chain network architecture, each block chain node is directly connected with an RDMA, so that an efficient communication mode with a network card can be directly realized by bypassing an operating system kernel; the cloud computing-oriented block chain system architecture specifically comprises a network layer, a consensus layer and a block chain layer. The method has the advantages that network communication is realized through RDMA, the block broadcasting speed can be increased, and therefore, the block synchronization delay can be reduced.

The invention relates to a distributed data synchronization method and system. The method comprises the following steps that: a scheduler inquires whether a synchronization task needs to be carried out from a source database, and elastically adjusts the query interval time of the scheduler according to a query result; the scheduler selects one synchronization component in a synchronization component cluster to execute the task; the synchronization component performs task segmentation and adopts a plurality of concurrent threads for processing; the synchronization component reads a synchronization data set from the source database and carries out data processing; and the synchronization component generates temporary unique identifiers to replace original unique identifiers of the synchronous data set, then writes the synchronous data set into the target database in batches, deletes updated old data records in the target database, and finally restores the original unique identifiers of the synchronous data set in batches. According to the distributed data synchronization method and system, the whole data synchronization performance is greatly improved.

The invention discloses a video and audio data processing system and method, and relate to the technical field of broadcasting of a broadcast television. The system comprises a video and audio source signal processing module configured to receive and process video and audio source signals to obtain video data and audio data respectively; an information processing module configured to copy and process the video data and the audio data to obtain target video data and/or target audio data; an information integration module configured to integrate the target video data and the target audio data to obtain original signals; a coding module configured to code the target video data and the target audio data according to preset coding parameters to obtain corresponding video and audio coding signals; an encapsulation module configured to encapsulate the original signals and the video and audio coding signals to obtain transmission signals and an IP signal of the broadcast television. According to the system and the method, the same video and audio source signals can be simultaneously output in different information channels.

The invention discloses a PostgreSQL database synchronization method and a PostgreSQL database synchronization system. The method comprises the following steps: acquiring a WAL log of a PostgreSQL database; configuring and registering a Kafka connector, and connecting the PostgreSQL database and the Kafka cluster; monitoring the WAL log, and storing WAL log data obtained through monitoring in a Kafka part; consuming the top data in the Kafka cluster, encapsulating the acquired top data into data in a Json format, and synchronizing the encapsulated data in the Json format into an ElasticSearch database. According to the method and the system, a partition algorithm is adopted, partition keys can be flexibly defined through configuration parameters, and databases with the same characteristics can be synchronized into the same partition for ordered consumption and storage of signing data.

The invention discloses a federated learning training acceleration method for a heterogeneous scene. The federated learning training acceleration method for the heterogeneous scene comprises the following steps: S1, distributing a training task to a server and a client; and S2, running a client algorithm and a server algorithm according to the training task to obtain a client running result and a server running result. According to the federated learning training acceleration method for the heterogeneous scene provided by the invention, the problem of low synchronization efficiency in existing federated learning can be solved.

The invention relates to the field of databases, in particular to a method and a device for synchronously updating data in batches in a database. The method mainly comprises the steps of obtaining source updating operation needing to be synchronized in a source end database; obtaining a condition column information set and an updating column information set in each source updating operation; generating a target update statement for synchronization according to the condition column information set and the update column information set of all the source update operations; according to the value of the condition column in the condition column information set and the value of the updating column in the updating column information set, generating a binding data row for the condition column and the updating column of the target updating statement; and submitting the target update statement as a target update operation to a target end database, and updating the target database in batches by using the values in the bound data line. According to the method and the device, the batch binding of the data lines cannot be realized by using multiple source updating operations of the batch binding of the data lines at present, and the data synchronization is completed by using the batch binding of the data lines, so that the effect of reducing the synchronization delay is achieved.

The invention provides a distributed multi-copy data synchronization method, a distributed multi-copy data synchronization system and a server. The method comprises the following steps of: splitting transaction data of each transaction operation into at least one piece of record information; generating an update version number corresponding to each piece of record information, and transmitting therecord information of the at least one transaction operation and the corresponding update version number to a target server; and on the target server, verifying the update version number to determinewhether to update the corresponding record information to the target server or not, so that the distributed multi-copy data synchronization efficiency can be improved.