8results about How to "Avoid communication interruption" patented technology

The invention discloses an NFC power supply detection device and method and an NFC system, the NFC power supply detection device comprises an NFC chip, an NFC antenna module and a control module, and the NFC antenna module supplies power to the control module when receiving an electromagnetic signal; and the control module obtains the power supply state of the NFC antenna module according to the power supply voltage output by the NFC antenna module, and sends the power supply state to the NFC chip, so that the NFC chip gives out a prompt. According to the technical scheme, through the synergistic effect of the NFC chip, the NFC antenna module and the control module, the power supply state of the NFC antenna module can be monitored and fed back in real time, communication interruption or functional faults caused by insufficient power supply are avoided, the stability of the system is improved, the equipment can timely prompt a user to adjust the position of the equipment under the condition of insufficient power supply, and the user experience is improved. Continuous operation of the equipment is ensured, and the reliability and user experience of the equipment are improved.

The present application belongs to the technical field of Internet of Vehicles and communication security, and discloses a federated learning training method based on vehicle state perception and applicable to dynamic Internet of Vehicles. The method collects vehicle running state information of vehicle clients, preliminarily screens candidate vehicle clients, calculates comprehensive scores of the screened vehicle clients, adopts a client selection strategy combining selection of the top-ranked clients with random supplementation to determine a set of vehicle clients participating in the current round of federated learning, configures local training parameters for the selected vehicle clients according to vehicle speed and computing capacity, performs local training on local data sets to obtain model updates, performs weighted aggregation on the model updates of the effective participating vehicle clients at the server end, introduces a momentum mechanism to smooth the model update process, and obtains new global model parameters. This method effectively improves the stability, robustness and training efficiency of federated learning in a high-dynamic Internet of Vehicles environment.

This invention provides a method and system for optimizing downhole communication links based on self-organizing networks, relating to the field of communication link technology. The method includes acquiring communication node information, constructing a network topology, and determining network characteristic parameters; constructing a link quality prediction model to evaluate link quality; performing dynamic network partitioning and establishing a node priority ranking table to select the optimal transmission path; and real-time monitoring of link status, triggering node self-organizing reconfiguration when necessary. This invention can improve the connectivity, stability, and transmission efficiency of downhole communication networks, reduce communication latency, and enhance the safety of downhole operations.

The invention relates to an electronic circuit technology, and discloses a power-off time-delay circuit and a power-off time-delay method of a fan control system, when a power supply module supplies power normally, a key device is supplied with power through a first switching power supply, a charging and discharging unit is charged at the same time, and the power supply starting response time of the key device in a power utilization module is not influenced; when the power supply module supplies power abnormally, the charging and discharging unit discharges the second switching power supply, so that the second switching power supply converts and outputs a proper second voltage to supply power to the key device, thereby realizing a power-off delay function and ensuring that the key device works normally within a certain time. According to the invention, enough delay time can be provided for the system to maintain communication among the control modules, the problem of overvoltage possibly caused by direct use of capacitor discharge is also avoided, and key devices are protected. The invention aims to solve the problem of communication interruption of the fan control system caused by the jitter of the power supply, meet the power-off delay demand of the system, and avoid the influence on the starting response of the system.

The application discloses a gateway and a switching method for low-orbit satellite IoT-NTN and 4G cellular network fusion communication, and the gateway comprises a main control module, a 4G communication module, a low-orbit satellite IoT-NTN communication module, a power management module and the like. The 4G module and the satellite module are independent of each other and are uniformly scheduled by the main control module. In the switching mode, the main control module constructs an adaptive switching decision model based on a double-link packet loss rate: when the 4G network packet loss rate exceeds a first threshold value, and the difference between the 4G and satellite network packet loss rates in a plurality of continuous detection periods is greater than a second threshold value, and the minimum switching interval is met, the satellite network is switched to; when the satellite network is working, if the 4G network quality is restored and the minimum network staying time is met, the 4G network is switched back. Through the double-link cooperation and the intelligent switching mechanism based on the packet loss rate difference and the time constraint, the application solves the problem that the communication continuity and the cost control are difficult to be considered in the Internet of Things scene, and realizes the low-power, low-frequency and high-reliable dual-mode communication.

The invention discloses a dual-mode communication method and system. According to the method, when a terminal performs service transmission in a first communication mode, stability information is obtained, and a prospective risk judgment basis is formed based on the stability information; when the prospective risk judgment basis meets a preset condition, starting a radio frequency and access process of a second communication mode to enable the second communication mode to enter an available state; when the two communication modes are in the available state at the same time, determining a main bearing communication mode and generating a corresponding data migration strategy; according to the main bearing communication mode and the data migration strategy, gradually transferring the service data to the main bearing communication mode for bearing; and after determining that the main bearer communication mode stably bears all service data, degrading or releasing non-main bearer communication resources, thereby realizing seamless switching of dual-mode communication. The method can effectively improve the continuity and reliability of communication switching, and is suitable for various heterogeneous network communication scenes.

The utility model discloses an integrated electronic badge of many communication modes, solve the technical problem of single communication mode of electronic badge in the prior art, and the use scene is limited. Including main control module, positioning module, SIM card module, bluetooth module, LoRa module and power module, main control module is connected with positioning module, SIM card module, bluetooth module, LoRa module and power module respectively, still including main antenna, GNSS antenna, bluetooth antenna and LoRa antenna, main antenna is connected with main control module through radio frequency module, GNSS antenna is connected with positioning module, bluetooth antenna is connected with bluetooth module, LoRa antenna is connected with LoRa module. The electronic badge of the present application is adapted to multiple scenes, and is suitable for office building, mine and other scene personnel management. Can be widely used in electronic badge technical field.

The invention discloses an ammeter data acquisition field problem analysis method and system, and belongs to the ammeter operation and maintenance field, and the method comprises the steps: receiving a first message sent by a concentrator in real time through a first serial port, and forwarding the first message to a CCO module through a second serial port when the first message is received; a second message sent by the CCO module is received in real time through the second serial port, and when the second message is received, the second message is forwarded to the concentrator through the first serial port; and analyzing the first message or the second message through a cyclic redundancy check method, and when any one of the first message or the second message has an error, positioning a fault according to the error message. Therefore, by implementing the method and the device, the problem of how to accurately position the fault position on the premise of not influencing the normal communication of the system can be solved.