115 results about "Superframe" patented technology

The invention discloses an industrial multi-source heterogeneous data feature fusion and dynamic modeling method and system, and relates to the technical field of industrial multi-source heterogeneous data processing, and the system comprises a data collection module, an event triggering type local space-time alignment module, a time sequence data set generation module, a feature fusion module and an industrial equipment state model generation module. According to the method, an event-triggered local space-time alignment module is arranged, an event-driven dynamic space-time anchoring mechanism is adopted, and in a preset tolerant time window, an image feature time sequence is constructed through industrial camera superframe sampling to be matched with sensor time sequence data, so that feature dislocation caused by sampling frequency difference is avoided; compared with an existing interpolation method, the non-linear coupling relation between the process parameter data and the sensor time sequence data is obtained, and the problem of feature fusion distortion caused by the time granularity difference is solved by performing non-linear interpolation on the process parameter data through Gaussian process regression and generating a continuous proxy curve synchronous with the sensor time sequence data.

The invention provides a satellite signal transmitting method, device and equipment and a computer storage medium, and the method comprises the steps: determining a target first signal and a target satellite through signal quality evaluation parameters of a plurality of first signals received by first ground equipment, and then carrying out the transmission of a satellite signal based on a pseudo-range of the target first signal and an error correction parameter of the target satellite, calculating the downlink transmission time of the second signal, then obtaining the receiving moment when the first ground equipment receives the target first signal, calculating the theoretical emission moment of the second signal based on the receiving moment and the downlink transmission time of the second signal, and obtaining the superframe duration and the theoretical emission moment of the second signal; and calculating the first uplink transmission time delay when the second ground equipment transmits the third signal to the target satellite, and finally adjusting the actual transmission time of the third signal of the second ground equipment according to the first uplink transmission time delay, so that the actual transmission time of the third signal is aligned with the theoretical transmission time of the second signal, thereby improving the transmission success rate of the satellite signal.

The invention discloses a scheduling method supporting TDMA and CSMA / CA hybrid access, comprising the following steps: periodically broadcasting a beacon frame, the beacon frame being used for defining the structure of a superframe; wherein the superframe is divided into a TDMA period and a CSMA / CA period in time, and a time boundary between the TDMA period and the CSMA / CA period is dynamically adjustable; the TDMA period comprises one or more special time slots distributed to specific network equipment and is used for deterministic data transmission; the CSMA / CA period is a shared channel access period, and the network device competes for access through a CSMA / CA mechanism and is used for flexible data transmission. By dynamically adjusting the time boundary of the TDMA and CSMA / CA periods, the dynamic fusion of deterministic transmission and flexible transmission is realized, the dynamic fusion of deterministic transmission and flexible transmission is realized, the utilization rate of network resources is improved, and the dual service requirements in an industrial wireless network are met.

The invention discloses an ad hoc network system and method based on TDMA, and relates to the technical field of wireless communication. The system comprises a master node and a plurality of slave nodes which are respectively provided with a high-precision timing counter. A system defines a superframe structure containing time slots, a master node broadcasts access information, and slave nodes monitor access and allocate the time slots. A node broadcasts a beacon frame with a local timestamp in a sending time slot of the node, and calibrates a clock of the node when receiving a beacon of the node, so that distributed time synchronization is realized. When a node sends data, the sending time slot is ended in advance under the condition of distance so as to avoid crosstalk between the time slots. The system also defines a frequency sweeping time slot, and self-adaptive channel frequency hopping is realized through centralized decision of the main node so as to resist interference; and a dynamic time slot allocation mechanism is adopted, standby time slots are applied and released as required, and the resource utilization rate is improved. According to the invention, the problems of low synchronization precision, poor interference resistance, resource allocation rigidity, time delay influence and the like of the traditional TDMA ad hoc network are solved, and high-reliability and high-efficiency multi-hop ad hoc network communication is realized.

In an example, a method includes receiving a first downlink (406A) on a first channel from a wireless master node (302) at a wireless head node (306.1) in a WBMS in a superframe (402A), where the wireless head node (306.1) is a head node of a sub-cluster of one or more wireless devices (308). The method includes transmitting, in the superframe (402A), a second downlink (408) on a second channel from the radio head node (306.1) to each of the one or more wireless devices (308). The method includes receiving, at the radio head node (306.1), an uplink (420) from each of the one or more wireless devices (308) on the second channel in the superframe (402A). The method includes transmitting an aggregated uplink (424) from the wireless head node (306.1) to the wireless master node (302) on the first channel in the superframe (402A), wherein the aggregated uplink (424) includes data from each of the one or more wireless devices (308).

An operating method of a first ultra wide band (UWB) device, according to various embodiments of the present disclosure, comprises the steps of: receiving, from a second UWB device, a beacon message including configuration information about a superframe through which a plurality of UWB devices communicate; confirming a hybrid period (HP) and a ranging-only period (ROP) in the superframe on the basis of the configuration information; and communicating with a third UWB device on the basis of the HP and the ROP.

The present invention belongs to the technical field of industrial wireless networks, and particularly relates to an age-of-information optimization scheduling method for an industrial wireless network and based on a multi-dimensional conflict graph, the method comprising: compiling statistics on age-of-information changes of each data stream in each superframe, and on the basis of an average expected age-of-information calculation formula for the data stream, modeling the problem of minimizing the overall average expected age of information into an integer programming model for time slot and channel allocation; constructing a three-dimensional conflict graph composed of a data-stream–link–time-slot three-dimensional tuple, converting a time-slot scheduling problem into a maximum weight independent set problem, and solving same to obtain a time-slot scheduling strategy; and on the basis of the time-slot scheduling strategy, adding a channel dimension to the data-stream–link–time-slot three-dimensional tuple to form a four-dimensional tuple and constructing a four-dimensional conflict graph, converting a channel allocation problem into a maximum weight independent set problem for solving, and solving same to obtain a channel allocation strategy. The optimization scheduling algorithm used in the present invention can reduce the age of information of a data stream and improve the real-time performance of a network.

In an example, a method includes receiving, in a first superframe (502B), a first downlink (522B) from a wireless master node (504) on a first channel at a wireless device (506.5) in a WBMS, where the first downlink (522B) indicates a second channel assigned to the wireless device (506.5). The method includes transmitting, in the first superframe (502B), a synchronization frame (530) from the wireless device (506.5) to an asynchronous wireless device (506.3) on the second channel, where the synchronization frame (530) indicates a third channel. The method also includes receiving, in the first superframe (502B), the synchronization frame (530) at the asynchronous wireless device (506.3) on the second channel. The method includes transmitting an uplink from the asynchronous wireless device (506.3) to the wireless master node (504) on the third channel in a second superframe following the first superframe (502B).

The invention provides a video data WLAN (Wireless Local Area Network) transmission monitoring method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring data buffer time of a video sending end; performing superframe difference processing on the data buffer time and preset buffer time to obtain a buffer time difference; and sending a data retransmission loss signal to the video receiving end according to the cache time difference so as to adjust a retransmission request mode of the video sending end. Generally, video data transmission adopts a broadcast mode to send data packets, when frame number loss exists, supplementary transmission is carried out according to current buffer area data, specifically supplementary transmission is carried out in a unicast mode so as to make up the packet loss condition of opposite terminal equipment during broadcasting, and when retransmission is carried out, retransmitted fragmented packets are not received within the time range of one frame, the time range of one frame is not received. And if yes, stopping retransmission and discarding the fragmented packet so as to ensure low delay and reliability during video data transmission and further ensure the video data transmission quality.

Methods, apparatus, systems and articles of manufacture are described for a wireless battery system. An example apparatus includes at least one memory, instructions, and processor circuitry to at least one of instantiate or execute the instructions to identify a first battery node to transmit an uplink command during a first superframe interval, transmit a downlink command to the first battery node and a second battery node, the first battery node to switch in the first superframe interval from a receive state to a transmit state in response to the downlink command, the first battery node to transmit the uplink command in the transmit state, and receive the uplink command from the first battery node in the first superframe interval.

The invention provides a reverse time offset compensation method, device and equipment and a medium, and the method comprises the steps: determining a superframe header position through employing a superframe synchronization algorithm when a digital video broadcasting DVB terminal searches a satellite; performing frame format analysis processing based on the superframe header position to obtain a corresponding frame type format; when the superframe header position is in an available state, obtaining a theoretical frame header position corresponding to the frame type format according to the frame type format; and according to the theoretical frame header position and the superframe header position, determining a time offset error value and sending the time offset error value to a signaling processing unit, so that the signaling processing unit performs time offset compensation correction according to the time offset error value and determines a target time offset value. According to the scheme, the access stability and the data transmission reliability of the DVB communication system are improved.

This invention discloses a large-scale hybrid constellation distributed downlink spectrum sharing method based on game theory, comprising the following steps: establishing a link channel model in the hybrid constellation; using a perceived satisfaction function as an evaluation index of user performance; formulating a channel allocation game to capture the interaction and conflict between links, formalizing the channel allocation problem as a latent game; to solve the Nash equilibrium solution of the game model, dividing the system cycle into several equal topology cycles, with the topology of the ground-satellite link remaining unchanged within each topology cycle; dividing the topology cycle into a link establishment superframe and a data transmission superframe; and then using a distributed channel allocation algorithm based on stochastic learning for allocation. This application transforms a dynamic social problem into a static channel allocation problem; establishes a mathematical model based on game theory to represent user interaction; balances convergence speed and overall network satisfaction, and improves spectrum efficiency.

The present disclosure relates to a superframe number synchronization method and device, electronic equipment, chip and medium, wherein the method comprises: in the case of successful reestablishment of the confirmation mode, combining the current superframe number of the terminal device to decrypt the data packet received from the network device to obtain the decrypted data packet; combining the first data packet parameter in the data packet and the second data packet parameter of the decrypted data packet to determine whether the data packet is decrypted successfully; in the case of data packet decryption failure, selecting the target candidate superframe number of the successfully decrypted data packet from the candidate superframe number array corresponding to the current superframe number, and then updating the current superframe number to realize the superframe number synchronization between the terminal device and the network device; wherein through the comparison of the first data packet parameter and the second data packet parameter, the superframe number out-of-sync condition can be quickly detected, and the superframe number synchronization processing is performed, thereby avoiding data packet decryption failure and avoiding data transmission interruption, and improving the data transmission performance.

The embodiment of the invention provides a method and device for sending or receiving a broadcast channel. The complexity of BCH detection can be reduced, and the overhead of BCH analysis can be saved. The method comprises the following steps: a G node sends a broadcast channel (BCH), the BCH is centrally and continuously borne in a superframe in a time domain, and the length of the superframe is 1ms.

The invention provides an automatic gain control method and device, equipment and a medium, and the method comprises the steps: carrying out the superframe synchronization processing of received data, and obtaining a superframe header and superframe data of the received data; starting from the superframe header of the received data, extracting N segments of data according to a preset rule; each segment of data comprises M pieces of data; performing real and imaginary part analysis processing on all data in the N segments of data, and calculating an average power value; determining a power adjustment factor according to the average power value; the power adjustment factor is used for dynamically adjusting received data; and performing gain control on the whole superframe data by using the power adjustment factor to obtain data after gain control. According to the scheme, the operand can be reduced, the requirement for the hardware memory capacity is lowered, meanwhile, waiting time consumption caused by storage of a large amount of data is avoided, and the performance of a receiving system is improved.

Provided are a communication method, device and system, which belong to the technical field of communications, the method comprising: sending control information resource overhead indication information to a terminal node, the control information resource overhead indication information comprising: a bit value for indicating the number of symbols occupied by a group of ACK feedback information resources in a target superframe, the group of ACK feedback information resources are used for carrying ACK feedback information. The method and the device can be suitable for a next-generation satellite flash system supporting more application scenes, business models and larger user specifications. The method and the device are used for allocating the resources of the ACK feedback information.

The invention discloses an equipment working condition sensing signal wireless transmission method based on an ultra wide band and an electronic device, the method is applied to an ultra wide band signal sending end, and the method comprises the following steps: in a current superframe period, after waiting for a first waiting duration, sending a first data message of the ultra wide band signal sending end; if the second data message is received, determining a sending end timestamp synchronization source number of the next super-frame period, the last synchronization time of the sending end of the next super-frame period and the current timestamp of the sending end of the next super-frame period; and generating a to-be-sent data message of the ultra-wideband signal sending end of the next super-frame period based on the sending end timestamp synchronization source number of the next super-frame period, the latest synchronization time of the sending end of the next super-frame period, the current timestamp of the sending end of the next super-frame period and the sensor data frame of the next super-frame period. Therefore, ordered transmission and high-reliability receiving during multi-node ultra-wideband communication are realized.

The application provides a frequency offset estimation and correction method and computer equipment for digital wireless communication, and relates to the technical field of wireless communication. The method comprises the following steps: obtaining an improved superframe, performing coarse frequency offset estimation on the superframe to obtain a coarse frequency offset estimation value of the superframe; obtaining a coarse frequency offset correction value based on the coarse frequency offset estimation value; performing fine frequency offset estimation on the superframe to obtain a fine frequency offset estimation value of the superframe; obtaining a fine frequency offset correction value based on the coarse frequency offset correction value and the fine frequency offset estimation value; and correcting the superframe by using the fine frequency offset correction value to obtain a frequency offset correction result. The application realizes high-precision frequency offset estimation and correction without pilot by coarse frequency offset estimation and fine frequency offset estimation, reduces signal overhead, and improves communication reliability in a high-speed mobile scene.

The invention relates to the technical field of multi-group talkback, and discloses a high-confidentiality anti-channel-crossing multi-group parallel talkback management method and system, and the method comprises the steps: collecting an equipment identity set and a pairing starting timestamp of each talkback node, and carrying out the Hash processing, thereby obtaining a group dynamic authentication key and a group identifier, meanwhile, a leader authorization token is generated; taking a leader node corresponding to the leader authorization token as a main scheduling node, allocating a priority sub-time slot block to the leader node, allocating a competition time slot block to the member node, and generating a superframe time slot allocation table; the method comprises the steps of performing audio authentication, generating audio PCM (Pulse Code Modulation) data from audio data frames passing the authentication, outputting and playing the audio PCM data, discarding audio data frames which do not pass the authentication, and completing encryption isolation of multi-group parallel talkback. And the multi-group time domain isolation parallel operation is realized while the priority transmission of the leader security instruction is ensured.

The invention provides a communication method and a communication device, which can realize uplink synchronization between a terminal node and a management node and can be applied to a communication system. The method comprises the following steps: a terminal node sends an access request message on a first time-frequency resource; wherein the access request message comprises a target lead code, and the first time-frequency resource is located in the target superframe. And the terminal node receives an access response message returned for the access request message. Wherein the access response message comprises information used for indicating timing advance. The timing advance is used for uplink synchronization of the terminal node. The duration of the target superframe is 1 millisecond.

The embodiment of the invention discloses a data transmission method, device and system. The method comprises: acquiring a data frame comprising a plurality of subframes, the subframes comprising 226 pilot symbols in one polarization direction, the 226 pilot symbols being generated by a target polynomial and a seed, the target polynomial being x11 + x10 + x9 + x7 + 1; and sending the data frame. The super-frame architecture provided by the embodiment of the invention is relatively low in frame redundancy, and relatively good in sequence self-correlation and cross-correlation characteristics of the pilot symbols, so that the recovery signal of a receiving end is improved, and the quality of the recovered signal is improved.

The present disclosure discloses a method and apparatus for determining a hyperframe number (HFN) for a Packet Data Convergence Protocol (PDCP) entity, applicable to the field of communications technology. The method, configured to be executed by a terminal device, includes: receiving indication information sent by a network device, wherein the indication information includes hyperframe number (HFN) information; and determining the HFN value of the Packet Data Convergence Protocol (PDCP) entity based on the HFN information. This allows the terminal device and the network device to maintain a consistent understanding of the HFN value, avoiding data decryption failures or integrity verification failures and improving data transmission reliability.

The application relates to the technical field of data compression, and discloses a multimedia data compression method and device for narrowband transmission. The method comprises the following steps: performing double-threshold contour extraction on an input image to obtain main contour data and secondary contour data; performing mixed-precision chain code coding on the main contour data and the secondary contour data to obtain compressed contour chain codes; performing parameterization decomposition and superframe coding on an input speech signal to obtain compressed speech parameters; allocating a transmission bandwidth according to the compressed speech parameters, and packing the compressed contour chain codes and the compressed speech parameters based on the transmission bandwidth to obtain a target transmission packet sequence. The application ensures the time synchronization and transmission reliability of image and speech data, solves the problems of multi-modal data asynchronous transmission and high bit error rate in a narrowband environment, and guarantees correct reconstruction and playing at a receiving end.

The invention discloses an unmanned cluster hybrid access method and system based on statistical priority and time division scheduling fusion. The method comprises the following steps: step 1, constructing a three-stage macroscopic superframe framework of'beacon section-competition section-scheduling section 'on a time domain, introducing a'cyclic micro-frame' mechanism into a scheduling section TDMA (Time Division Multiple Access), discretizing the interior of a micro-frame into a two-dimensional orthogonal time-frequency resource matrix containing a plurality of frequency bands and time slots, and obtaining three resource attributes; step 2, rapidly obtaining the coordinates of the exclusive resources, synchronizing the use state of the resources to the whole network, and providing a global view; 3, constructing a global three-dimensional load view; 4, performing microscopic time slot level intervention on the local nodes with extremely unbalanced flow; 5, reallocation of macroscopic space-time resources is achieved by adjusting the boundaries of the two, and abnormal self-healing under high dynamic is achieved; and step 6, outputting an optimal access threshold value for the whole network through cross-layer calculation and dynamic optimization. According to the method, the high-dynamic concurrence requirement of the multi-stage tidal service is met.

Embodiments of the present application relate to the field of communications, and provide a communication method and apparatus, which can meet the communication requirements of a next-generation GT network by means of transmitting a superframe capable of expanding coverage. The method comprises: generating and transmitting at least one superframe to a terminal node. The length of each superframe among the at least one superframe is 1 millisecond, each superframe comprises S first frames, the S first frames comprise a first-type frame, and the first-type frame comprises N first symbols used for uplink / downlink data transmission / reception switching by the terminal node. Herein, S=2a, a is a positive integer, 1<a<24, N≤X, both N and X are positive integers, and X is the number of symbols comprised in each first frame.

The present application relates to the field of communications, and discloses a communication method and apparatus. The method comprises: transmitting broadcast information, a first training signal, and a second training signal, the broadcast information being transmitted within a same superframe as the first training signal and the second training signal, and within the superframe, a time domain resource position of the broadcast information being located after a time domain resource position of the first training signal, wherein the broadcast information is used for broadcasting basic physical-layer transmission information of a present communication domain, and both the first training signal and the second training signal are synchronization signals and are used for enabling other nodes to search for the communication domain and perform time and frequency synchronization with the communication domain. In the present application, the broadcast information is transmitted after the synchronization signals, thereby improving the synchronization efficiency in scenarios such as initial access and adjacent-frequency measurement, shortening the waiting time required during demodulation of a symbol carrying the broadcast information, and reducing buffer overhead.

This invention discloses a spaceborne optical switching system, method, and related apparatus based on a superframe time slot mechanism. The system includes several spaceborne nodes interconnected via inter-satellite laser links. Each spaceborne node comprises a master control node and slave nodes. The master control node maintains a global time reference, periodically collects service status information from each slave node, performs time slot and resource allocation calculations, and sends the optical switching configuration results to the execution layer. The slave nodes perform local service access, status acquisition and reporting, time synchronization locking, and transmit optical pulses or optical data signals according to a unified time system within their allocated time slots. This system, method, and related apparatus can overcome the bottlenecks in rate, power consumption, and latency caused by traditional electrical switching and software control methods, improving the speed, parallelism, and stability of the optical switching control process, thereby increasing the resource utilization of inter-satellite optical links and the overall throughput of the system.

A communication method and apparatus, relating to the technical field of communications, and capable of achieving a targeted design for the power control and coverage range of a low-order data channel and a high-order data channel, improving the communication performance of a communication system. The method comprises: in a first time period of a first superframe, sending first data to a terminal node at a first transmission power; and in a second time period of the first superframe, sending second data to the terminal node at a second transmission power, wherein the modulation order of the first data is greater than that of the second data, and the first transmission power differs from the second transmission power.

The invention discloses a cognitive model adaptive frequency hopping method of an industrial wireless WIA-PA network, and belongs to the technical field of industrial wireless communication. The invention aims to solve the core problems of weak interference resistance, low spectrum utilization rate, poor time sequence adaptation and lack of environmental self-learning of the existing WIA-PA network frequency hopping scheme. According to the technical scheme, an environment perception-cognitive decision-frequency hopping control-WIA-PA time sequence cooperation architecture is constructed, a reinforcement learning + channel quality evaluation two-dimensional cognitive model is adopted, parameters such as industrial environment interference intensity, a channel signal-to-noise ratio (SNR) and a frequency spectrum occupancy rate are collected in real time, a frequency hopping pattern adaptive to a WIA-PA superframe time sequence is dynamically generated, and the WIA-PA time sequence cooperation is realized. And completing channel switching in a CAP / CFP gap (the switching time is less than 10ms). According to the invention, the anti-interference intensity in the industrial temperature range of-40 DEG C to 85 DEG C reaches-70dBm, the spectrum utilization rate is improved by more than 40%, the data transmission success rate is greater than or equal to 99.5%, the delay is reduced to be within 5ms, and the method can be widely applied to WIA-PA network extreme interference scenes such as intelligent manufacturing, process industry, intelligent power grids and the like.

This invention belongs to the field of power system communication technology and discloses a method and related apparatus for optimizing power wireless local area network communication. The terminal acquires attribute reporting data and reports it to the wireless access point in the control time slot of the current superframe using a superframe-based dynamic time division multiple access mechanism. The wireless access point generates data time slot allocation information and physical layer parameter configuration information based on the attribute reporting data and sends it in the beacon frame of the next superframe. The terminal encodes data according to the configuration information and transmits it in the designated data time slot. The wireless access point receives the data. By jointly reporting service type, data volume, service quality level, and channel state information to the wireless access point, a complete decision-making basis is provided for cross-layer collaborative scheduling. This enables dynamic time slot scheduling of the media access control layer and adaptive configuration of carrier parameters and preamble sequences of the physical layer, effectively overcoming the problems of fixed resource allocation being unable to adapt to the dynamic needs of differentiated services and low resource utilization efficiency caused by independent optimization of two layers.