8 results about "Delayed time" patented technology

The invention discloses a dynamic election method and system for an MODBUS redundant master station. The method comprises the steps that an initial master station broadcasts a specific heartbeat message to a bus regularly; all the candidate nodes continuously monitor the bus and judge whether the initial master station fails or not; if the initial master station breaks down, a master station election mechanism is triggered; calculating waiting delay time of each candidate node, and starting an ontology delay timer; when the delay timer of the candidate node expires, immediately carrying out carrier sensing, and judging whether a bus is idle or not; if the monitoring bus is idle, a master station declaration message is broadcasted immediately, and the self state is switched to a master station; and if the monitoring bus is busy, giving up the master station declaration and returning to the slave station state. Priority ranking logic is carried out preferentially through the minimum address, and it is ensured that a unique and optimal result can be rapidly output in each election process; and through carrier sensing, conflicts caused by the fact that a plurality of candidate nodes compete for the bus at the same time are effectively avoided, and the stability and reliability of the system are ensured.

The invention discloses an information transmission method and device based on label bit delay distribution, which are applied to a sending end, and comprises the following steps: carrying out coding interleaving on an original information bit sequence to generate an interleaved bit sequence, and carrying out rearrangement based on a variable node degree of a protograph to obtain a rearranged bit sequence; constructing a label bit set based on a constellation diagram order, performing reliability sorting according to mutual information of each label bit in the set, dividing the label bit set into a plurality of label bit subsets, and allocating delay time slots; mapping the rearranged bit sequence to tag bits corresponding to the tag bit subsets in a blocking manner, converting the rearranged bit sequence into modulation symbols, modulating the modulation symbols and then performing transmission pretreatment to generate transmission signals, and transmitting the transmission signals to a receiving end through a visible light communication channel; and decoding the transmission signal through a receiving end, generating a decoding bit sequence, and outputting the decoding bit sequence. Therefore, through division of tag bit subsets and bit sequence rearrangement, delay time slot distribution accuracy is guaranteed, and visible light communication transmission reliability is effectively improved.

This enables rapid time correction, preventing the time difference between the source and destination from widening. [Solution] The communication device sends and receives control messages with the source communication device to obtain the average delay time during communication. Based on statistical information of multiple average delay times obtained through multiple transmissions and receptions of control messages, it sets a threshold time range for the average delay time. If the most recently obtained average delay time is within the threshold time range, the communication device corrects its own time based on the time difference between the most recently obtained average delay time and the time of the source communication device to synchronize with the time of the source communication device.

The present disclosure relates to a communication method, a terminal, a network device, and a storage medium. The communication method comprises: receiving first information, the first information being used for activating at least two target transmission configuration indicator (TCI) states; receiving a synchronization signal block (SSB) transmitted by a transmission and reception point (TRP) corresponding to each target TCI state, wherein the first SSBs transmitted by the TRPs corresponding to the at least two target TCI states have an overlap in time domain; and on the basis of the received SSBs transmitted by the TRPs corresponding to the target TCI states, determining the switching delay time of the target TCI state s. According to embodiments of the present disclosure, when the first SSBs transmitted by at least two TRPs among mTRPs partially or completely overlap, a terminal can accurately determine the switching delay time of target TCI states.

Disclosed is a method and apparatus for transmitting an object which includes packets and is significant for an application of a receiver, the method including calculating a network latency between a sender and a receiver through a control message for transmitting a plurality of packets constituting the object, detecting that a specific packet is lost among the plurality of packets, calculating a retransmission required time required for retransmitting the specific packet, comparing the retransmission required time with a deadline, and transmitting a NACK message including information related to retransmission of the specific packet to the sender when the retransmission required time is within the deadline, wherein the network latency is used for calculating the deadline determined by latency times for transmission of the object.

A communication device for transmitting data to a counter device via a network, said communication device comprising a processing unit that calculates an expected transmission rate expected during non-congestion on the basis of the amount of transmission data that has not been acknowledged and a value relating to a round-trip delay time, calculates an estimated reception rate on the basis of the amount of transmission data that has been acknowledged, and determines that congestion has occurred in the network if the expected transmission rate exceeds the estimated reception rate.

The invention discloses a time synchronization method and device of a wireless communication system and the wireless communication system, and the method is applied to any non-network clock reference node in the wireless communication system. The method comprises the following steps: after round-trip delay time correction is carried out for the first time, acquiring a measured value of clock skew between a local clock and a target clock as an initial estimated value of Kalman filtering; performing Kalman filtering based on the measurement value and the initial estimation value to obtain a posteriori estimation value of the clock skew; and updating the local clock based on the posteriori estimation value. According to the time synchronization method and device of the wireless communication system and the wireless communication system, time synchronization of the nodes in the wireless communication system is carried out based on Kalman filtering, the precision of time synchronization can be remarkably improved without changing conditions such as system bandwidth or sampling rate, the stability of time synchronization is enhanced, and the time synchronization efficiency is improved. And a high-precision, stable and reliable communication basis is provided for a wireless communication system.

The application relates to an overload protection method and system of a JP cabinet, a terminal and a storage medium, and relates to the field of overload protection of a JP cabinet.The method comprises the following steps: identifying a day type label according to a current date and a calendar rule; obtaining maximum load currents of the JP cabinet in corresponding time periods of N same type day type labels from a historical database, and calculating an average value of the maximum load currents; calculating an overload protection threshold value of a current time period according to the average value and a preset safety margin coefficient; obtaining a total incoming line current value in real time and calculating a current change rate; if the current change rate exceeds a short-circuit threshold value within a preset time window, triggering a quick-break tripping signal after a first delay time; if the quick-break tripping signal is not triggered, triggering an overload tripping signal when the total incoming line current value exceeds the overload protection threshold value and reaches a second delay time; and updating the maximum load currents of each time period to the historical database.The application has the effects of improving power supply reliability and guaranteeing power supply continuity.