30results about How to "Avoid sync failures" patented technology

A generation method of a circular training sequence containing two training symbols includes: randomly growing a first information clock with the length of N, copying the last L data before the first information block as the circulation prefix of the first training symbol, forming the first information block to the information block of the second training symbol in the same length with the first information block in terms of the circulation mode, namely, the second information block, in which, the circulation mode is to shift the last d data of the first block to the start position and copy the last L data of the second block before the second block as the training prefix of the second training symbol, so that the two symbols form a circulation training sequence.

The embodiment of the present invention provides a method and device for synchronizing video network resources to Internet terminals, which relate to the technical field of video networking. At the decompression transfer terminal, receive the Internet-of-Vision resource synchronization request sent by the Internet terminal based on the Internet protocol; the synchronization request includes: the identification of the co-translation server; the co-translation server stores a video-network resource compression package; The target co-conversion server corresponding to the co-translation server identifier forwards the Internet of Vision resource synchronization request; receives the resource compression package of each Internet of Vision corresponding to the Internet of Vision resource synchronization request returned by the target co-translation server; After receiving the resource compression package, decompress each video network resource compression package and synchronize it to the database. Synchronization failures due to long reception times can be avoided.

The invention relates to the field of wireless communication, and discloses a synchronization method and device between base stations. The method includes the steps that when the local base station reaches the search time of synchronization source base stations, whether the synchronization source base station meeting the synchronization condition exists in the adjacent base stations or not is judged; if the synchronization source base station meeting the synchronization condition exists, the synchronization source base station meeting the synchronization condition is switched into the target synchronization source base station of the next base station synchronization; when the local base station reaches the synchronization time, the local base station and the target synchronization source base station are synchronized. Through the synchronization method, synchronization failure caused by changes of a synchronization source self or influences of environmental factors can be effectively prevented, and reliability of base station synchronization is improved.

The invention discloses a processing method and a system of synchronization failure in dynamic content distributing (DCD) service. A series of error status codes defined in advance are stored in a terminal. When the synchronization between the terminal and a DCD server fails, the terminal reports a corresponding error status code to the DCD server according to a failure reason; then the DCD server carries out processing according to the failure reason expressed by the error status code, and when the failure reason is an temporary error, the DCD server informs the terminal to immediately attempt synchronization so as to avoid that a synchronous process of a normal retry mechanism delays the time of data synchronization, and thereby, user experience can be influenced. Correspondingly, when the failure reason is a fatal error, the DCD server sends a fatal error message to inform the terminal to let a user terminate synchronization so as to avoid that the synchronization triggered by the retry mechanism continuously fails, and thereby, an information interactive condition between the server and a client side can be improved. Meanwhile, the invention also discloses a processing system of synchronization failure in DCD service.

The invention discloses a variable-frequency main power source ship power station, and the power station comprises prime motors ME, engines G, rectifiers, a DC busbar DC, an AC busbar AC, an inverter, and a frequency converter. There are a plurality of groups of motors ME, engines G and rectifiers. The motors ME are connected with the engines G, and drive the engines G to rotate. The engines G output electric energy to the rectifiers, and the rectifiers are connected with the DC busbar DC, and transmit the direct current to the DC busbar DC. The inverter is connected between the DC busbar DC and the AC busbar AC, enables the direct current of the DC busbar DC to be converted into the alternating current with the rated frequency, and supplies the alternating current to the AC busbar AC of the ship power station. The frequency converter is connected with the DC busbar DC, and the direct current is used for controlling variable-frequency power utilization equipment through the frequency converter after frequency conversion. The invention solves a problem of energy waste caused by the condition that the rotating speeds of prime motors ME are constant and cannot be adjusted along with the load change when the change of a power utilization load of a ship under different work conditions is bigger.