71results about How to "Fix data loss" patented technology

The invention relates to an automobile CAN bus encryption method. The method includes: firstly enabling a sending node to recombine to-be-sent data in a CAN bus network into a plurality of data blocksaccording to an AES encryption algorithm block byte length requirement; adding a check mechanism to each data block and adding a check bit to the tail of the tail end data block; carrying out bit compensation on the tail end data block by utilizing random data; encrypting each data block by using an AES encryption algorithm to obtain each ciphertext data block; enabling the sending node to perform data segmentation on each ciphertext data block, set a time identifier and an order identifier and send the ciphertext data blocks to the receiving node through the CAN network; enabling the receiving node to receive each ciphertext data block and detect the integrity of each ciphertext data block; according to the detection result, confirming that that it is discarded that this time of receiving is completed or splicing and decryption are conducted after extraction is conducted according to the preset time identifier and the sequence identifier, carrying out verification in combination witha verification mechanism after decryption to confirm the effectiveness of data transmission. The data transmission efficiency is improved, and the safety of data information transmission on an automobile is guaranteed.

The invention relates to a 1394 bus transaction layer-link layer data packet transmitting circuit and method. The circuit comprises an asynchronous transmission data cache region management module, an asynchronous transmission scheduling control module, an asynchronous transmission FIFO cache management module, an isochronous transmission data cache region management module, an isochronous transmission data scheduling control module, an isochronous transmission FIFO cache management module and a control and register management module. According to the 1394 bus transaction layer-link layer data packet transmitting circuit and method, transmission data cache regions are automatically managed, and whether errors occur on data packets in a transmission data channel can be monitored in real time, and asynchronous and isochronous transmission of communication data can be compatible. With the 1394 bus transaction layer-link layer data packet transmitting circuit and method adopted, the technical problem of data loss and instability of 1394 bus serial communication can be solved; large-scale data transmission can be realized; requirements for real-time performance and reliability of communication in application can be effectively satisfied; fault spread can be avoided; and the work of a system and the utilization rate of resources can be improved. The circuit and method have high fault tolerant ability.

The invention discloses a double network hot standby method. The party to which data are to sent, namely a data receiver, of a data sender adopts two network connection channels which both are in work state, data to be sent of the data sender is queued to be sent, a data sending module of the data sender takes out the data in sequence and sends the data to the two network connection channels; the data receiver receives the data simultaneously through the two network connection channels; and data transmission is not influenced when data receiving of any one of the two network connection channels is interrupted alone, and the data transmission is interrupted only after both the two network connection channels are interrupted. The method provided by the invention is simple and feasible and effectively and reliably solves the problems of data loss and repetition in double network data transmission treatment process, so that the time interval-less double network switching is realized, and the double network can be called interval-less switching double network.

The invention relates to a non-vehicle-mounted charger data transmission method, system, a BMS (battery management system) and a monitoring terminal. The non-vehicle-mounted charger data transmissionsystem comprises a non-vehicle-mounted charger, a battery management system, a full vehicle CAN bus, a vehicle-mounted remote monitoring terminal and a cloud server. Data of the non-vehicle-mounted charger is sent to the battery management system by the non-vehicle-mounted charger; the data of the non-vehicle-mounted charger sent by the non-vehicle-mounted charger is received and cached by the battery management system, and the data of the non-vehicle-mounted charger is sent to the full vehicle CAN bus; the cached charger data is transmitted to the cloud server by the vehicle-mounted remote monitoring terminal through wireless network; and the charger data of the vehicle-mounted remote monitoring terminal is collected by the cloud server in real time, and response messages are sent to thevehicle-mounted remote monitoring terminal by the cloud server. According to the non-vehicle-mounted charger data transmission method, system, the BMS (battery management system) and the monitoring terminal, a reliable guarantee for realizing remote monitoring of the data of the non-vehicle-mounted charger and real-time analysis of charging situations is provided.

The present invention relates to a fiber bragg grating temperature measurement system of a communication machine room, and a communication machine room temperature detection method. The system comprises a broadband light source emitter, at least one optical fiber, at least one fiber bragg grating sensor arranged on the at least one optical fiber and a fiber grating processor. The broadband light source emitter is configured to emit a broadband light source to the at least one optical fiber; the at least one fiber Bragg grating sensor is suitable for being installed at temperature collection points in the communication machine room and is configured to perform reflection of the broadband light source propagated by the at least one optical fiber; and the fiber grating processor is configuredto determine the temperatures of positions where the at least one fiber bragg grating sensor is located according to the wavelength of the reflection optical waves of the at least one fiber bragg grating sensor. The fiber bragg grating temperature measurement system of the communication machine room, and the communication machine room temperature detection method have no detection blind areas, are good in timeliness, save manpower, reduce or avoid cabinet device electromagnetic interference in the communication machine room, and is high in accuracy.

The invention discloses a processing method when a video server is congested, which is used for preventing message storm from being produced, and preventing accidents of the video server such as equipment halting caused by reaching processing bottleneck. The method comprises the following steps that: a video camera sends a first message to the video server; the video server analyzes an IP header from the first message when finding in a processing bottleneck state; an IP address of the video camera is acquired; the video server sends a backoff message to the video camera according to the acquired IP address; and after the video camera receives the backoff message, the video camera determines time delay duration according to a preset algorithm, and sends the first message to the video server again when the time delay duration is reached. The invention also discloses a device and a system for realizing the method.

The present invention is method and system of automatically creating and managing remote terminal graphic user interface conversation. Into the remote graphic user interface protocol, are increased display attribute message, user's identity message, re-initializing message, conversation display, conversation service monitoring, user's identity confirmation, conversation management, graphic window activation, and graphic user interface conversation disconnection, cancellation and re-connection. The present invention makes the user managing mechanism of host operation system compatible with user's personal configuration, simplifies the management of remote terminal graphic user interface conversation, raises the utilization of host computer system CPU and memory, and raises the availability of remote graphic user interface.

The invention discloses a smart phone-based voice encryption system and its implementation method. When a user account is bound, the system control module realizes the input of the user account by calling the user interface control module to judge the validity of the input user account, and the server will verify the validity of the input user account. Send the SMS to the user account; realize the input of the SMS verification code, judge the correctness of the input SMS verification code, realize the user information input, and judge the legitimacy of the input user information; call the data sending and receiving module to communicate with the server to complete the user registration , call the user interface control module to wait for the user operation, and complete the binding of the user account; Account information modification. It also includes: a password module, and the invention solves the possible problems of data loss and privacy leakage.

The invention discloses a method and a device for realizing data synchronization of active and standby meta-servers, which are used to solve the problem that in the prior art, since data synchronization must rely on a third-party device, the data between the active and standby meta-servers cannot be guaranteed when the third-party device fails. consistency issues. The method is as follows: every time the router receives a file operation request sent by a user, it forwards the received file operation request to the main meta server, and locally saves the file storage location information returned by the main meta server for the file operation request; receiving When the acquisition request sent by the backup element server is reached, it is determined that the primary element server runs abnormally, and according to the acquisition request, the storage location information of all files currently saved locally is sent to the backup element server. The above method solves the problem of data loss between the primary element server and the backup element server based on the reliability of the router and does not require additional third-party equipment.

The invention relates to a method for encrypting an automobile CAN bus. Firstly, a sending node reassembles the data to be sent in the CAN bus network into several data blocks according to the block byte length requirements of the AES encryption algorithm, and adds a verification mechanism to each data block. And add a check digit at the end of the end data block, and then use random data to fill the end data block, use the AES encryption algorithm to encrypt each data block to obtain each ciphertext data block, and then send the node to each ciphertext data After dividing the block into data and setting the time mark and order mark, it is sent to the receiving node through the CAN network. The receiving node receives each ciphertext data block and checks its integrity. The time mark and the order mark are set to be extracted, spliced ​​and decrypted, and after decryption, combined with the verification mechanism for verification to confirm the validity of the data transmission, which improves the efficiency of data transmission and ensures the security of data information transmission on the car.

The invention provides an interactive wireless communication system based on a general processor and a ZYNQ processor. The system comprises a man-machine interaction module, a central processing module and an internal interconnection module; the man-machine interaction module is interconnected with the central processing module and is responsible for running a man-machine interaction program, receiving service data and the running state of the module from the central processing module, configuring relevant parameters through a touch screen and issuing the relevant parameters to the central processing module so as to input and output audio data and store and display the data; and the central processing module is interconnected with the man-machine interaction module and is responsible for wireless transceiving function, wireless channel parameter configuration and storage, communication waveform switching and storage and data communication with the man-machine interaction module. According to the invention, a ZYNQ chip is used for integrating the ARM processor and an FPGA logic programming unit, the complex bus connection is avoided, peripheral circuit design is simplified, and theFPGA logic unit expands various communication interfaces and can be directly mounted on the ARM processor.