23 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.

A conversion device (100) is provided with a Sync message processing unit (11), a FollowUp message processing unit (12), a DelayReq message processing unit (13), a DelayResp message processing unit (14), a PdayReq message processing unit (21), a PdayResp message processing unit (22), a PdayResFollowUp message processing unit (23), and an upper-side transmission delay calculation unit (40) that calculates a transmission delay time (pt1) between a master device (200) and the conversion device (100). An internal processing time calculation unit (50) that calculates the internal processing time of the conversion device (100); and a CF processing unit (60) that stores the sum of the (pt1) and the internal processing time in a FollowUp message.

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.

Receiving device for receiving radio waves transmitted by a transmitter and for estimating the angle of incidence of a direct wave from the transmitter, comprising: first to Nth (where N is an integer not less than 2) wireless receiving devices, each provided corresponding to first to Nth antenna elements forming a group antenna, and performing frequency conversion and A / D conversion on first to Nth analog signals obtained by receiving the radio waves each through the first to Nth antenna elements to output first to Nth digital signals; First to Nth transmission channel estimation units for estimating transmission channel frequency characteristics based on the first to Nth digital signals, and outputting first to Nth transmission channel estimation results; a delay time estimation unit for estimating, by means of a super-resolution process, delay times of one or more arriving waves contained in the radio waves, based on a transmission channel estimation result within the first to Nth transmission channel estimation results; a delay time grouping unit for comparing the delay times estimated by the delay time estimation unit with a threshold to determine whether the estimated delay times are shorter than the threshold; first to Nth delayed wave removal units, each corresponding to the first to Nth transmission channel estimation units, which remove an incoming wave component from the first to Nth transmission channel estimation results according to the delay time determined by the delay time grouping unit to be equal to or greater than the threshold, and output the first to Nth transmission channel frequency characteristics with respect to the incoming waves of the delay times determined by the delay time grouping unit to be shorter than the threshold; first to Nth incoming wave separation units, each provided corresponding to the first to Nth delayed wave removal units, and each separating incoming wave components contained in the first to Nth transmission channel frequency characteristics from each other to extract first to Nth direct wave components; and an incidence angle estimation unit for estimating an incidence angle of the direct wave based on a phase difference between the first to Nth direct wave components.

The invention provides an RGMII delay automatic compensation system and method, and the system comprises an Ethernet MAC circuit which is used for receiving and transmitting data through an RGMII interface; the sampling circuit is connected with the RGMII interface and is used for sampling a plurality of signal lines of the RGMII to obtain phase information among signals; and the delay compensation circuit is respectively connected with the high-precision sampling circuit and the Ethernet MAC circuit, and is used for calculating the delay time of each signal line according to the phase information and controlling the Ethernet MAC circuit to carry out delay compensation. According to the RGMII delay automatic compensation system provided by the invention, the problem of inconsistent signal delay caused by PCB wiring length difference is solved, and the signal integrity and the system stability of RGMII interface communication are effectively improved.

A method performed by a user equipment connected to a base station of a satellite communication network for sending a signal using an updated value of timing advance, the user equipment determining values of timing advance based on at least assistance information, measurements, timing advance commands, the method comprising: selecting a transmission time of the signal between at least: —a target time of transmission of the signal, and —a postponed time of transmission of the signal, later than the target time, based on a combination of at least two elements among: a time-related parameter, a final timing advance command received at a final command time, final measurements obtained at a final measurement time, final assistance information received at a final assistance time, the final measurement, command and assistance times, transmitting the signal to the base station at the transmission time using the updated value of timing advance.

The present application relates to the technical field of wireless communication, in particular to a kind of ultra-wideband concurrent identification method and system, applied to base station, and base station wireless covers multiple tags, comprising: receiving the data packet sent from tag;Data packet is pre-registration packet, and time slot number is allocated to tag and delay time is calculated, and it is sent to tag by allocation time slot packet;Data packet is point-to-point ranging packet, and update register and send ranging response packet;Data packet is broadcast ranging packet, and the time slot number occupied by tag is marked in register, and ranging response packet is sent;Data packet is ranging end packet, and the distance with tag is calculated.The present application can be applied in mine environment, and base station and tag do not need to be strictly time synchronized, and system positioning capacity is higher.Simplify the cumbersome registration process of previous tag, improve system time utilization, and reduce the waiting time of tag by optimizing tag registration process, the present application improves the registration rate per unit time of system and the overall stability of ranging.

This communication system is provided with a plurality of communication devices (100), and frames are transmitted and received between the plurality of communication devices (100). Each of the communication devices (100) is provided with a communication control unit (130) that sets a reset time, which is for resetting a sequence number used for sequentially transmitting and receiving the frames, to a time of every 1 / n (where n is a number greater than 1) of a permissible delay duration T from the start of communication to frame arrival. Then, the communication control unit (130) resets an assigned sequence number and a historical sequence number (621) at the reset time.

This terminal comprises: a transmission unit that transmits data of a first logical channel having a first priority and data of a second logical channel having a second priority; and a control unit that, when the data of the second logical channel includes data having a short allowable time for a delay, applies a priority higher than the second priority to a data unit including data having a short allowable time for the delay.

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.

The application relates to the field of communication technology and discloses a delay message delivery method, which comprises the following steps: receiving and storing delay messages and corresponding delivery times sent by a message producer; generating a consumption queue and corresponding time wheel data loaders according to the delivery times, and storing the delay messages into the consumption queue corresponding to the delivery times; loading the first time wheel data loader and the second time wheel data loader into a time wheel executor when detecting that the time wheel executor is started; generating a consumption task according to the delay messages in the consumption queue corresponding to the first time wheel data loader and loading the consumption task into a time wheel scale; regularly taking out the consumption task from the time wheel scale and delivering the delay message corresponding to the consumption task to a message consumer; and starting the second time wheel data loader and updating the time wheel data loader in the time wheel executor after the first time period ends. The delay message delivery method can realize the message delivery function with an arbitrary delay time.

A current controlled buck regulator circuit (10; 100; 200), comprising a half bridge (20; 20') comprising a high side switch (21; 21a, 21b) and a low side switch (22), driven by a PWM signal (PWM_cmd) through respective drivers (41, 42; 141, 142), comprising a pair of drivers (41, 42; 141, 142) both coupled to a given switch among said high side switch (21; 21a, 21b) and low side switch (22) to supply selectively a first driving current (Ia) and a second driving current (Ib) to said given switch (21; 21a, 21b), enabling selectively said first (Ia) and / or second (Ib) driving current to supply a current switching on said given switch (21; 21a, 21b), the value of an ON current (HS_I) passing through said given switch (21; 21a, 21b) at the switch-on depending on which of said first (Ia) and / or second (Ib) driving current is enabled, a timing arrangement (141', 142'; 41s', 41b', 42') being configured during the switch-on of said switch (21; 21a, 21b), to enable said first (Ia) and / or second (Ib) driving current so that in said given switch (21; 21a, 21b) passes an ON current (IHSon) with a first value , then after a delay time enabling said first and / or second driving current so that in said given switch (21; 21a, 21b) passes an ON current (IHSon) with a second value greater than said first value.

The invention discloses a time division multiplexing communication method and device of a wireless Mesh network, and relates to the field of network communication. The method comprises the following steps: synchronizing clocks of all nodes of the whole Mesh network; dividing a time slot based on a preset period to obtain a plurality of fixed time slots, and generating a random number according to the unique ID of each node and the synchronization timestamp; based on a preset state judgment algorithm, according to the random number, judging the signal receiving and transmitting state of each node in each fixed time slot; in every continuous X fixed time slots, Y fixed time slots are set as common competition time slots, and the common competition time slots compete channels for all nodes to complete data receiving and transmitting; in the common competition time slot, determining a sending priority according to the delay time of the data packet in each node sending queue; wherein X is greater than Y. According to the invention, the technical problems of large communication delay, frequent retransmission and communication congestion with many conflicts caused by sudden increase of the number of nodes or the amount of forwarded data in the Mesh network in the prior art are solved.

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 invention relates to the technical field of optical networks, and discloses a C + LEON resource optimization method and system based on a service priority and a signal-to-noise ratio, and the method comprises the steps: calculating the number of frequency spectrum slots required by a current service request and a working path, judging whether to reserve the service request in real time or in advance according to the maximum tolerable delay time, and if yes, determining whether to reserve the service request in advance; calculating the priority of the service request reserved in advance for resource allocation; whether a high-order modulation format or a low-order modulation format is applied to the current service request is judged according to the average level of all the modulation formats, if the high-order modulation format is applied, a final hit method is used for spectrum allocation in a C wave band, and if the low-order modulation format is applied, a first hit method is used for spectrum allocation in an L wave band; and calculating the optical signal-to-noise ratio of the currently available spectrum resources, and when the optical signal-to-noise ratio is higher than a preset threshold value, selecting the spectrum resource corresponding to the highest optical signal-to-noise ratio to establish service connection. According to the invention, when different types of service requests are processed, the utilization rate of network resources is improved, the delay and blocking rate is reduced, and the service quality is improved.

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.

To reduce the difference in propagation delay time between a base station and a terminal device in a communication relay system.SOLUTION: In a communication relay system of an embodiment, a parent station device acquires a duplexing method for each of a plurality of downlink signals from a base station by detecting it from the downlink signals or from setting information, detects first timings indicating predetermined timings for the plurality of respective downlink signals, estimates second timings indicating predetermined timings for the plurality of respective downlink signals based on the plurality of first timings and the acquired duplexing methods, selects timing reference values from the plurality of second timings, adjusts each of the plurality of downlink signals based on the timing reference values and the second timings, and adjusts each corresponding uplink signal using an adjusted amount obtained by adjusting each of the plurality of downlink signals.SELECTED DRAWING: Figure 3

In a communication system (50), a FlexBr(Master) (1) and a FlexBr(Slave) (2) each having a bridge function between a low-speed interface and a high-speed interface are connected by an optical path, the FlexBr(Slave) (2) notifies the FlexBr(Master) (1) of information related to the FlexBr(Slave) (2) and including information relating to a data amount currently stored in an input buffer unit to which data is input from a user terminal (20), and the FlexBr(Master) (1) performs bandwidth control of the input buffer unit of the FlexBr(Slave) (2) on the basis of a round-trip delay time calculated from the transmission time of the information related to the FlexBr(Slave) (2) and the reception time of the information related to the FlexBr(Slave) (2), and the information relating to the data amount currently stored in the input buffer unit such that time division multiplex control output in the low-speed interface thereof becomes possible.

A method for operating a first communication unit of a communication system to determine, using a second communication unit, a maximum value for a latency time of a data packet transmitted from a first communication unit to a second communication unit of the communication system. The method includes: receiving, using the first communication unit, at least one token message sent from the second communication unit to the first communication unit and including time information representing a reference time of the token message; and sending, by the first communication unit, the data packet with the time information included in the at least one received token message to the second communication unit to determine the maximum value for the latency time of the data packet transmitted from the first communication unit to the second communication unit on the basis of the time information comprised by the data packet.

A method for increasing the efficiency of a multipath (MP) communication network includes: providing at least a first communication path and a second communication path for exchanging data packets between a sender entity and a receiver entity; determining timing information about the first communication path and about the second communication path; calculating a latency difference ΔL by using the timing information of the first communication path and of the second communication path; and delaying data packets sent over the communication path with the shorter latency value by a time interval TDelay that has at least the length of the latency difference ΔL.