68 results about "Superframe" patented technology

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.

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.

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.

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 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 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.

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.

The invention discloses a plant growth data monitoring interaction method based on a user-defined communication protocol, and relates to the field of digital information transmission, a communication superframe corresponding to an environment change period is defined, and a convergence gateway broadcasts a synchronous beacon frame containing a superframe serial number; the monitoring node receives the synchronous beacon frame, calculates a target logic time slot by using a discrete mapping algorithm based on the unique hardware identifier and the superframe serial number, and awakens and sends data in the target logic time slot; and if the synchronous beacon frame is not received, the monitoring node performs reverse deduction on the captured neighbor node identifier by using a discrete mapping algorithm so as to reconstruct the whole network time base, and the problem of channel congestion caused by large-scale node synchronous concurrent transmission is solved under the condition of not depending on complex signaling scheduling.

A method includes entering a communication extension mode. After entering the communication extension mode, the method includes outputting via a network, to at least a first device of a first partition and a second device of a second different partition, a first beacon signal of a first communication extension mode frame. The first beacon signal can include a first indication of one slot of the first communication extension mode frame to be output after the first beacon signal and corresponding to a first communication protocol and a second indication of another slot of the first communication extension mode frame to be output after the first beacon signal and corresponding to a second different communication protocol. After outputting the first beacon signal, the method includes using the one slot of the first communication extension mode frame, corresponding to the first communication protocol, to transmit data from the first device of the first partition. And, after outputting the first beacon signal, the method includes using the another slot of the first communication extension mode frame, corresponding to the second communication protocol, to transmit data via the network from the second device of the second partition.

The application provides a time slot allocation method and device for wireless self-organizing network, and the technical scheme comprises the following steps: setting fixed broadcast time slots and control time slots for each node in a wireless superframe; each node sends its broadcast information in its broadcast time slot and sends its network time slot information package in its control time slot; each node modifies its network time slot information package according to the network time slot information package of the one-hop neighboring node received by the node; and each node adjusts the occupied dynamic time slots according to its network time slot information package and the data amount to be transmitted, and modifies its network time slot information package according to the adjustment result. The technical scheme of the embodiment of the application has the advantages that each node only occupies dynamic time slots during data transmission, and meanwhile, one node can multiplex the same dynamic time slots with nodes other than its neighboring nodes, so that the use efficiency of the dynamic time slots and the network transmission bandwidth are improved, and the application is not sensitive to the number of nodes and has a wide application range.

This invention discloses a seismic assessment method for high-pile frame wharves considering the coupling between the superframe and pile foundation, belonging to the field of seismic technology for hydraulic structures. The method includes the construction of a data monitoring module, preprocessing of monitoring data, deployment of a deep neural network model, real-time assessment of structural damage and soil condition, trend assessment of structural damage and soil condition, calculation of comprehensive seismic toughness indices, and early warning of assessment results. It involves real-time acquisition and preprocessing of structural and soil response data, outputting quantitative assessment indices using a deep neural network model, and predicting the future evolution trends of key indices. Based on real-time and predicted results, it calculates comprehensive seismic toughness indices and their development trends from three dimensions: safety, functionality, and recoverability. Finally, it displays the assessment results and triggers graded early warnings. This method achieves real-time, dynamic, and forward-looking quantitative assessment of the seismic performance of wharf structures, significantly improving assessment accuracy and engineering decision support capabilities.

The invention relates to a perception method, a perception transmitter and a perception receiver. The sensing method comprises the following steps: a sensing transmitter determines a sensing reference signal sequence; sending a sensing reference signal according to the sensing reference signal sequence; wherein the sensing reference signal sequence is determined by cinit, and the cinit is determined by at least one of the following parameters: the number of a superframe where the sensing reference signal is located; the number of a wireless frame where the sensing reference signal is located in a superframe; the number of a time slot where the sensing reference signal is located in a wireless frame; the number of the OFDM symbol where the sensing reference signal is located in the time slot; and sensing reference signal sequence identification. According to the embodiment of the invention, a plurality of sensing sessions can be supported to be carried out at the same time, and different sensing sessions can use overlapped time-frequency resources, so that wireless resources are saved.

An apparatus configured to process, based on signaling from a base station, a configuration for an extended discontinuous reception (eDRX) cycle for one of a Radio Resource Control (RRC) Idle state or RRC Inactive state, wherein the configuration comprises one or more paging occasions (POs) in a paging timing window (PTW) of a Paging Hyperframe (PH) of the eDRX cycle, determine an identity of the PH based on a Hyperframe System Frame Number (H-SFN) of Hyperframes of the eDRX cycle and an identification (ID) of a user equipment (UE) and monitor the POs in the PTW for pages from a radio access network (RAN) or a core network (CN).

The embodiment of the invention provides a data transmission method and a related device. Specifically, a transmitting end acquires a superframe comprising a plurality of subframes, the subframes comprising training symbols and pilot symbols. Wherein in one polarization direction, the number of the training symbols in the sub-frame is NTS, the number of the pilot symbols in the sub-frame is NPS, and both the NTS and the NPS are integers greater than 1. Each training symbol and each pilot symbol are one of eight complex numbers including-A1-A1j,-A1 + A1j, A1-A1j, A1 + A1j,-A2-A2j,-A2 + A2j, A2-A2j and A2 + A2j, both A1 and A2 are real numbers not equal to 0, and | A1 | is smaller than | A2 |. Every continuous NPG symbols in the subframe comprise one pilot symbol located at a fixed position, and NPG is 96 or 128. Furthermore, the transmitting end transmits the superframe, and in one polarization direction, the number of all symbols in the superframe is 173568. It can be seen that the interval of inserting the pilot symbols in the sub-frame is larger, and redundancy is reduced. In addition, one symbol in the sub-frame is both a training symbol and a pilot symbol, so that the structure of the sub-frame is simplified.

The invention discloses a circuit service satellite-borne switching device based on link resource structure imbalance, and relates to the field of satellite communication. The device comprises an input interface analysis unit, a receiving scheduling unit, a circuit data uplink and downlink mapping unit, a configuration management unit, a circuit data exchange unit, a circuit data queue management unit and an output interface processing unit. The device can be adapted to a circuit data forwarding function of any resource configuration model, time slot fragments of input circuit data bearing the same link number are cached in sequence in unit time, and the time slot fragments of the link numbers are spliced to form a group of superframes; and at the starting moment of unit time, circuit data with corresponding lengths are sequentially intercepted from the currently cached superframes according to a downlink time slot resource allocation mode, the circuit data are forwarded and cached to a specified position of a downlink queue through exchange, and finally the data in the queue are sequentially read and output. The method is easy to operate, high in expandability and suitable for any circuit service exchange model.

The invention discloses a communication method and device, relates to the technical field of communication, can determine time domain resources of a sounding reference signal (SRS), and can reduce signaling overhead and scheduling overhead at the same time. The method comprises the following steps: acquiring first information; and obtaining first indication information, and sending the SRS to the management node in the time domain resource of the SRS according to the first indication information. Wherein the first information is used for indicating a time domain resource pool of the SRS, and the time domain resource pool of the SRS comprises at least one symbol after the switching interval symbol; the switching interval symbol is a switching interval symbol in at least one hybrid radio frame of the superframe; the first indication information is used for indicating the time domain resource of the SRS of the terminal node in the time domain resource pool of the SRS.

Embodiments of the present application disclose a data processing method, device and system, which are simple in hardware implementation, low in power consumption and good in compatibility with various coherent transmission scenarios. First, d in bits are added to first data including d CP bits to obtain second data including d scr bits, d in and d CP are integers greater than or equal to 1, and d scr =d in +d CP . Then, the second data is processed by encoding, dual-polarization symbol mapping and framing to obtain at least one superframe. The first data is represented by r rows and q=2056 bits per row, and q=2056 is compared with the existing scheme of 10280 bits per row, which can better realize the future probabilistic constellation shaping (PCS) and better compatible with the 1.6T ZR+ data processing method using PCS in the future. Moreover, the number of dual-polarization symbols in the at least one superframe is an integer multiple of 172032, which can be compatible with the 1.6T ZR+ data processing method using multi-subcarrier or multi-path optical signal transmission in the future.

Provided in the embodiments of the present application are a wireless communication method for a TDMA system, and a related apparatus. The wireless communication method is applied to a first communication device, and comprises: determining a superframe corresponding to one service call, wherein the superframe comprises a plurality of data bursts and flexible bursts, the data bursts are used for bearing first service data to be transmitted by the first communication device, and the flexible bursts are provided to the first communication device for transmitting second service data or receiving third service data; and the first service data, the second service data and the third service data are data of the same service or data of different services. A superframe comprises a flexible burst, which serves as an idle time period and may be provided to a first communication device for sending service data, may also be provided to the first communication device for receiving service data transmitted by another device, and may also be provided to another communication device for transmitting service data. Therefore, an idle period is allocated in one superframe to transmit other information, thereby facilitating service expansion and enabling better support for user requirements.