596results about How to "Guaranteed synchronization" patented technology

A broadcast media viewing system includes a source of a broadcast stream including primary data providing primary media content and supplemental data providing supplemental information. A media content viewing mechanism decodes the primary data and renders the primary media content to a first active display. A portable device decodes the supplemental data and renders the supplemental information to a second active display.

The invention discloses large screen splicing method and system, wherein the method comprises the following steps of: A, transmitting the same video stream to a plurality of PC (Personal Computer) decoding terminals connected through a network to ensure the synchronous transmission of data through the modes of UDP (User Datagram Protocol) multicasting transmission and the like; B, carrying out delay regulation on each PC decoding terminal through NTP (Network Time Protocol) clock synchronism and frame timestamp to ensure the image quality of a spliced large screen; and C, cutting and displaying part of the image by using each PC decoding terminal to ensure that the image of the spliced large screen is integral and non-overlapped. The invention realizes the infinite amplification on splicing the large screen through the infinite expansion of the PC terminal, realizes the flexible changes of the splicing size and the resolution ratio of the large screen through the arbitrary combination of the PC decoding terminals and ensures the synchronism of each part of the image of the spliced large screen as well as the uniformity and the continuity of the whole image through video delay regulation.

The embodiment of the invention provides synchronization method and device for MAC (Media Access Control) address table information of a distributed network processing system. In the method, during the transmission of a service message of the same service, a service processing board receiving the service message learns or updates the MAC address table information corresponding to the MAC address according to the MAC address of the service message, the MAC address table information is the corresponding relationship between the MAC address and the port of the service processing board; at the same user network interface side or the same network interface side of the distributed network processing system, the MAC address table information is synchronized to another service processing board of the distributed network processing system if the transmission port receiving the service message and the transmission port transmitting the service message are not located on the same service processing board. The efficiency for the synchronization of the MAC address table information is improved, and the space occupied by the MAC address table information is saved.

The invention provides a session management method, a terminal, a management functional entity and an access network node, and relates to the technical field of communication. The session management method comprises the following steps: in a service request process, receiving a session establishment failure message fed back when a protocol data unit (PDU) session requested by the terminal is not established successfully on a network side, wherein the session establishment failure message includes session identification information; and performing deactivation of a session corresponding to thesession identification information. Through the scheme, the session establishment failure message is fed back to the terminal timely when the PDU session requested by the terminal is not established successfully on the network side, thereby solving the problem concerned with how to notify the terminal when a network refuses connection establishment of certain PDU sessions in a 5G service request process, ensuring synchronization of PDU sessions between the terminal and a core network side, and ensuring the reliability of network communication.

Embodiments of the invention provide a method for establishing long connection between a client and a server, a communication method and a communication system. When the method is applied to the mobile client, the mobile client comprises a long connection service module and one or more service processing modules; and the long connection service module communicates with the long connection server through a long connection communication link. The method comprises the following steps: the long connection service module receives service data sent by the long connection server through the long connection communication link, wherein the service data carries synchronization point information; notification information is generated according to the service data and the corresponding synchronizationpoint information; and the notification information is sent to the one or more service processing modules. Based on the robust long connection communication link, the mobile client can receive the service data pushed by the server at any time, so that the availability of a long connection service is improved.

This invention discloses a method and a system for synchronizing network clocks, which sets synchronous source nodes with mutual redundance in a wireless sensor network to design them a working clock node and a backup clock source node and selects a regional master clock node in network node to form a synchronous queue, the network node asks for clock synchronization to the nodes in the synchronous queue, the backup clock source node computes the mean queue synchronous clock based on the difference between the local clock and the synchronous clock of the working clock node and sends it to the regional master clock node in the queue so as to realize clock rectification to the regional master clock.

The invention discloses a method for realizing base station synchronization, which includes the following steps: a second base station defines a first base station according to indication information sent by other base stations; the second base station searches the position of a descending pilot frequency time slot (DwPTS) of the first base station and adjusts the position of the DwPTS according to the position of the searched DwPTS; the second base station reads a system frame number (SFN) from the broadcasting information of the first base station and updates the SFN to be the read SFN. In the invention, the second base station realizes synchronization among different base stations through building the time slot synchronization and frame synchronization with the first base station. Not every base station is needed to be provided with a GPS receiver, therefore, the system cost is greatly reduced. In addition, the realization of the invention can completely break away GPS, therefore, the synchronization among all the base stations can be still ensured when the GPS fails. The invention also discloses a device for realizing the synchronization of the base station and a relevant base station.

A method and an apparatus for synchronizing card without traffic in multi-card multi-standby mobile terminal are disclosed. The method includes: receiving, by a non-traffic card, a synchronization channel signal from an adjacent network cell according to frequency point of a synchronization channel of the adjacent network cell prestored in the non-traffic card, when a traffic card is in traffic; if the receiving of the synchronization channel signal from the adjacent network cell fails, performing, by the non-traffic card, a full-frequency network searching after the traffic of the traffic card, for receiving a synchronization channel signal from a network cell of the network cells and establishing synchronization with the network cell corresponding to the synchronization channel signal. The method and apparatus avoid communication failures caused by the out-of-synchronization of non-traffic card during the traffic (i.e. service) of the traffic card.

The invention provides a data synchronization method which is used for migrating data in a source database to a target database. The data synchronization method is characterized in that the data synchronization method comprises the following steps: judging whether current time is equal to or later than a data time point and delay time or not, if so, entering a data synchronization step, and otherwise, rejudging after waisting for certain time; synchronizing the data, i.e., migrating the data of the source database to the corresponding position of the target database; meanwhile, recording the number of migrated data strips; judging whether the strip number of data synchronization is greater than the product of the current experience strip number and a preset threshold as a coefficient, if so, ending migration, and otherwise, waiting a preset waiting time duration and then returning to the step of data synchronization; meanwhile, recording the accumulated waiting duration; recalculating to determine the experience strip number and delay time according to the number of the migrated data strips in the data synchronization record; and returning to a start step.

The invention provides a method and a device for time synchronization and maintaining based on frequency deviation estimation. The method includes firstly, synchronizing time of a slave clock and a master clock and calculating a frequency deviation initial value R0 of the master clock and the slave clock; and secondly, estimating the corresponding time of the slave clock to the master clock at the moment t according to the calculated frequency deviation initial value R0, calculating the synchronization time measured value Ts of the slave clock at the moment t, determining whether synchronizing time or not according to the error of the master clock time and the synchronization time measured value Ts, if yes, synchronizing time of the slave clock and the master clock, and if not, acquiring N new master clock counts and slave clock counts to recalculating a frequency deviation value R based on the N new master clock counts and slave clock counts. By means of the method and the device for time synchronization and maintaining based on frequency deviation estimation, a distributive system can be more accurate in clock synchronization and more convenient in operation.

The invention discloses a method for data migration of a non-relational database HBase. According to the method, by reading configuration file information of users, data within a time period designated by the users are migrated from an old HBase cluster to a new HBase cluster. The method has the advantages that by designing RowKey, group information and time information of the data are embodied on the RowKey, and whether the data corresponding to the RowKey are within a migration time range designated by the users can be directly identified by scanning the RowKey during data migration; groups serve as data migration units, every group serves as a check point, the range of the non-synchronous data between the old HBase cluster and the new HBase cluster can be rigidly controlled within one group when abnormal conditions occur, and time required for restoring data synchronization is reduced; log information is recorded in the data migration process to be used for treating the abnormal conditions in the data migration process, synchronization of the data between the old cluster and the new cluster is guaranteed, and data migration between the HBase clusters can be finished accurately and efficiently.

The invention discloses a database data access method, system and device and a readable storage medium of a computer. The method includes the following steps that a target row data recording corresponding to a access request is searched in a target data queue in a distributed type cache; the target row data recording is searched, and according to the access request and a target row data recordingblock corresponding to the target row data recording, a temporary index mark array of an index mark number corresponding to the access request is generated and stored; the temporary index mark array is compared with a target index mark array, and a comparison result is obtained; according to the comparison result, data in the distributed type cache and a database are synchronized. According to themethod, high-accessibility data is pre-cached in the distributed type cache, the row data is recorded and segmented, a corresponding index mark is assigned to each row data recording block, the hit rate of the access request in the cache is improved, the error that the database is directly inquired according to the access request is avoided, and the high-accessibility frequency of the data is reduced.

The invention relates to a method for protecting data encryption in a monitoring system. The method comprises the steps: only one identity key is arranged for each first device respectively; an encryption key corresponding to data information of the prior first device is obtained according to the identity key of the prior first device, the data information of the prior first device is encrypted by adopting the encryption key to generate the encryption data stream, and the encryption data stream is transmitted. In addition, the invention also discloses a monitoring system, a monitoring center and a first device for supporting data encryption protection. The technical scheme disclosed by the invention can enhance the security of the data information.

The invention discloses a key alternation method which comprises the following procedures: evolution nodes send access stratum safe mode command information which is encrypted and wholly protected through an old key set to user equipment; after successfully processing the access stratum safe mode information with the old key set, the user equipment sends the finished access stratum safe mode information which is encrypted and wholly protected through an old key set to the evolution nodes, and next, the user equipment begins encrypting or decrypting user plane data with a new key; after processing the finished access stratum safe mode information with the old key set, the evolution nodes begins encrypting or decrypting user plane data with a new key. The invention also discloses a key alternation system and the composition equipment. The invention can be used for ensuring that the key used by the user equipment is synchronous with the key used by the network user information when keys are alternated, thus avoiding user communication data from losing lead by the de-synchrony between the key used by the user equipment and the network key, and fatherly raising the communication quality of users.

A communication system, user device thereof, and a synchronization method thereof are provided. The communication system includes a user device and a wireless network. A ciphering configuration information is transmitted to a user device. The user device and wireless network re-establishing the radio link control (RLC) entity of logical link. The user device changes to the new ciphering configuration immediately following the re-establishment of RLC entity according to the received ciphering configuration information and the wireless network changes to the new ciphering configuration.

The invention relates to a hemiplegic patient self nursing and rehabilitation training trolley which consists of a veering walking device used for moving, a lifting device used for relieving the bowels by self and for walking training, a swing training device arranged on a bracket and used for up-and-down and left-and-right training of sick arm, a walking training device that is used for simulating human walking and consists of a annular slideway, a pulley, a walking training footplate, a winch, a connecting rod and a walking training motor in a linkage way, a seat board device used for sitting and for relieving the bowels, a backrest adjusting device and an operating device. The invention provides a nurse type integral nursing device for the hemiplegic patient; the patient can walk or take rest, relieve the bowels by self on the trolley and carry out sick arm swinging training, and standing and walking training just by operating the device by the healthy arm, thereby encouraging the hemiplegic patient to take heart and build confidence to live; and no special person is required to take care of the patient always, thereby lightening the pressure of the family of the patient at the aspects of living, work, economy, spirit, etc.

The invention discloses an access method and device for an application system and relates to the technical field of multisystem login access. The access method for the application system comprises the following steps that a proxy server sends identity authentication information corresponding to an access request to a preconfigured unified identity authentication management platform to carry out identity authentication when the proxy server receives the access request of the application system, which is initiated by a user; and only when the identity authentication information corresponding to the access request passes the identity authentication of the preconfigured unified identity authentication management platform, the proxy server sends the access request to the corresponding application system to carry out login authentication.

The invention discloses a self-adaption electronic differential control system which comprises a vehicle controller, an upper computer, two inverters and two driving motors which correspond to two driving wheels. The upper computer is connected with the vehicle control system, the upper machine is connected with two inverters through a controller area network (CAN) bus, and the driving motors are controlled to rotate by the inverters. Difference between slip rate of two driving pulleys is taken as a steering signal of an automobile so as to achieve self-adaption steering and switching. In the process of direct movement, the control system can guarantee that wheel speed is synchronous to vehicle speed, and simultaneously, motor power is changed in a real-time mode along with resisting moment of motion so as to achieve stable motion. In the process of bending movement, a torque control model based on best slip rate is used for revising a torque command in a real-time mode so as to control the slip rate to achieve the best place and stable steering. In addition, the self-adaption steering control based on the slip rate does not need a steering sensor and can save cost.