354 results about "Beacon frame" patented technology

The invention provides an HPLC (High Performance Liquid Chromatography) station area cooperative communication method based on clock synchronization, which comprises the following steps: step 1, multi-dimensional data acquisition and broadcasting: each concentrator periodically acquires clock precision, stability and reliability data, and sends a beacon frame containing a timestamp and a health degree score through a power line carrier broadcasting channel; step 2, dynamically calculating the index distinction degree by using an entropy weight method, adaptively allocating weights, and electing an optimal main CCO in real time; step 3, dual-mode PID cooperative control: the main CCO adopts a dual-mode switching strategy of a dynamic PID algorithm and a chaotic fractional order PID algorithm; 4, monitoring a synchronization state in real time by constructing a clock check network, and optimizing a fault isolation strategy in combination with weighted scoring to realize that the state switching time of the master node and the slave node is less than or equal to 50ms; cooperative communication is realized on the basis of completing synchronization of the concentrators CCO in the whole network. Redundant message transmission is reduced through a dynamic parameter resynchronization mechanism, and the utilization rate of network resources is optimized.

The invention discloses a power line carrier communication protocol data link layer simulation method, which comprises the following steps of: constructing a physical layer interface simulation module, simulating power line carrier or wireless air interface transmission through TCP socket communication, and creating a high-priority task process to process time slot-level time sequence synchronization for triggering a physical layer transceiving action at a specified time slot; configuring a time sequence synchronization control mechanism, obtaining a timestamp carried by a beacon frame sent by a concentrator, calling a clock synchronization function to align a site local clock with the timestamp when receiving the head of the beacon frame, adding delay compensation before sending data, and delaying and starting a physical layer receiving action to offset IP network transmission delay when receiving the data; a data frame processing flow is realized, a header callback function is controlled through a registration frame to respond to a physical layer state change, TCP message data is cached by using an annular queue, and a physical layer interface simulation module analyzes a message, distributes a memory and processes a load at a specified time slot after time sequence synchronization.

A non-AP MLD operates in an EML mode that applies in a set of EML links. The non-AP MLD receives, by a first affiliated station, a first beacon frame over a first link of the EML links, the first beacon frame including a TBTT related to a second beacon frame. Moreover, the non-AP MLD configures the first affiliated station to be in a receiving state at the TBTT to receive the second beacon frame.

A method and a device for transmitting or receiving a frame in a wireless LAN supporting EMLSR are disclosed. A method of a first STA comprises the steps of: transitioning the operation state of the first STA from a listening operation state to an EMLSR operation state by considering a TBTT of a first AP; receiving a beacon frame from the first AP in the EMLSR operation state; when the beacon frame indicates that a data unit to be transmitted to the first STA exists in the first AP, transmitting a PS-Poll frame to the first AP; and receiving a data frame including the data unit from the first AP in the EMLSR operation state.

The invention relates to the technical field of terminal communication, and provides a team state synchronization method based on ad hoc network communication, an intelligent terminal and a medium, after a plurality of intelligent terminals complete team networking, a first intelligent terminal elected as a team master device broadcasts a synchronization beacon frame, enabling the second intelligent terminal to enter a corresponding working state after receiving the synchronous beacon frame; predicting whether the bit error rate in a future short time is increased or not based on the channel impulse response fed back by the second intelligent terminal and the real-time position coordinates; when the predicted bit error rate is increased, forward error correction coding redundancy is increased in a pre-sent light effect instruction, and a target light effect instruction is obtained; and the target lighting effect instruction is sent to the second intelligent terminal, so that the second intelligent terminal controls the partition lamp group to output the corresponding lighting effect according to the received target lighting effect instruction, and visual synchronization of the team state is realized. According to the method, the accuracy of light effect instruction transmission can be guaranteed, and efficient visual synchronization of the team state is realized.

The invention relates to the technical field of communication, and discloses an access point, terminal equipment and a short-distance communication time synchronization method and system.The access point equipment and the terminal equipment each comprise a baseband signal processing unit, a radio frequency unit, an antenna, a global time counter and a clock compensation module. The time synchronization method is executed by a target terminal: receiving a beacon frame broadcasted and sent by an access point; calibration information is embedded in the beacon frame, and the calibration information comprises timestamp information and a transmitting power parameter; calculating actual propagation delay of the access point and the target terminal based on the timestamp information; calculating target propagation delay of the access point and the target terminal based on the transmitting power parameter; calculating a delay error between the actual propagation delay and the target propagation delay; and calibrating the clock skew of the target terminal based on the delay error. The time, frequency and link calibration of the access point and the target terminal can be completed by using the one-way time broadcast, and the calibration precision is high.

This disclosure provides systems, methods, and apparatuses for wireless communication performed by a wireless communication device. An example wireless communication device includes an access point (AP) multi-link device (MLD). The AP MLD transmits a beacon frame to a wireless station (STA) MLD, the beacon frame including a plurality of AP medium access control (MAC) addresses of respective APs belonging to the AP MLD. The AP MLD receives an association request from the STA MLD, the association request including a plurality of STA MAC addresses of respective STAs belonging to the STA MLD. The AP MLD generates, during a handshake operation with the STA MLD, one or more encryption keys configured to encrypt communications between the AP MLD and the STA MLD. The AP MLD verifies the plurality of STA MAC addresses based at least in part on the one or more encryption keys.

A method and a device for low power operation in a wireless LAN supporting an MLSR operation are disclosed. The method of an STA MLD comprises steps in which: a power saving operation is performed in a first link and a second link; a first STA receives a beacon frame from a first AP associated with an AP MLD while the first STA associated with the STA MLD operates in an awake state in the first link; the first STA performs first communication with the first AP in the first link on the basis of the beacon frame; and, after completion of the first communication, a second STA performs second communication with a second AP associated with the AP MLD while the second STA associated with the STA MLD operates in the awake state in the second link.

This disclosure describes systems, methods, and devices related to multi-link traffic steering. A device may establish one or more links with a station multi-link device (STA MLD), wherein the STA MLD comprises one or more logical entities defining separate station devices. The device may generate a traffic indication map (TIM) bitmap of a plurality of bits, wherein one or more bits are associated with an association identification (AID) corresponding to the STA MLD. The device may set the one or more bits to a first value to indicate that there is data to be retrieved by the STA MLD on any of the one or more links. The device may generate one or more beacon frames each comprising a same TIM element, wherein the TIM element comprises the TIM bitmap. The device may cause to send one or more beacon frames on each of the one or more links.

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.

A method performed by a wireless device operating as an access point in a wireless network to allocate a restricted access window (RAW) for wake-up receiver stations. The method includes generating a beacon frame, wherein the beacon frame includes information regarding a RAW that is allocated for one or more wake-up receiver stations, wherein each of the one or more wake-up receiver stations includes a main radio and a wake-up receiver and wirelessly transmitting the beacon frame.

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 invention provides a wireless network connection method and device, electronic equipment and a storage medium. The method comprises the following steps: receiving a beacon frame sent by a wireless access point, wherein the beacon frame comprises an encrypted message and a key material; determining a target key corresponding to a key material from an intelligent card of the terminal equipment according to the beacon frame; performing decryption processing on the encrypted message through the target key to obtain related information of a wireless network of the wireless access point; and sending an encrypted authentication request to the wireless access point according to the related information, the authentication request being used for establishing wireless network connection between the terminal device and the wireless access point. According to the scheme, after the terminal device comprising the smart card decrypts the encrypted message, the related information of the wireless network can be obtained, and the related information of the wireless network is prevented from being open to all devices, so that the security of network connection is improved.

A communication method and apparatus, an electronic device, and a storage medium. The communication method is applied to a non-access point multi-link device (Non-AP MLD). The method comprises: monitoring that a beacon frame sent by an access point multi-link device (AP MLD) comprises an added affiliated AP, and obtaining parameter information of the added affiliated AP; and carrying the parameter information in a target radio frame, and sending the target radio frame, wherein the target radio frame instructs to re-establish a connection with the AP MLD. Provided is a method for associating a Non-AP MLD to an added affiliated AP.

A first access point (AP) transmits to a second AP a first frame requesting first restricted target wake time (R-TWT) information of the second AP based on not receiving a beacon frame of the second AP within a first period from a target beacon transmission time (TBTT) of the second AP. The first AP receives from the second AP a second frame comprising the first R-TWT information of the second AP in response to the first frame.

Disclosed is a method for transmitting a frame of a wireless communication system. A non-AP STA receives a beacon frame comprising a request type field from an AP and can receive a downlink frame or transmit an uplink frame in accordance with a specific field value included in the beacon frame. Here, the request type field comprises a specific field for indicating a target wake time (TWT) for a low latency operation, and, if the value of the specific field is set as a first specific value, a broadcast TWT service period (SP) is a TWT SP for the low latency operation.

This disclosure provides systems, methods, and apparatuses for wireless communication performed by a wireless communication device. An example wireless communication device includes an access point (AP) multi-link device (MLD). The AP MLD transmits a beacon frame to a wireless station (STA) MLD, the beacon frame including a plurality of AP medium access control (MAC) addresses of respective APs belonging to the AP MLD. The AP MLD receives an association request from the STA MLD, the association request including a plurality of STA MAC addresses of respective STAs belonging to the STA MLD. The AP MLD generates, during a handshake operation with the STA MLD, one or more encryption keys configured to encrypt communications between the AP MLD and the STA MLD. The AP MLD verifies the plurality of STA MAC addresses based at least in part on the one or more encryption keys.

In a wireless local area network (LAN) system, an STA of a multi-link device (MLD) may transmit MAC addresses of other STAs included in the same MLD as the STA in a link setup step. The MAC addresses of other STAs may be included multi-link address information. The multi-link address information may be included in a Multi-link Element defined in a conventional Management frame such as a Beacon Frame, a Probe Response Frame, an Association Request Frame, and an Association Response Frame.

The embodiment of the invention provides a wireless CSI (Channel State Information) sensing and communication method, an AP (Access Point) and a device, relates to the field of communication, is applied to the AP, is suitable for universal network scenes such as FTTR (Fiber To The Rate) and the like, can be deployed in the AP and is applied to target sensing, equipment control, security and protection, health monitoring and the like in a home scene, but the application range of the wireless CSI sensing and communication method is not limited to the FTTR scene. The method comprises the steps that beacon frame data are transmitted through a first channel, and an AP receiving the beacon frame data can calculate CSI data based on the beacon frame data to perform wireless CSI sensing; and transmitting a communication signal containing the communication data through the second channel, wherein the first channel and the second channel are located at different frequency bands. By applying the scheme provided by the embodiment of the invention, the mutual interference between the sensing signal and the communication signal can be reduced under the condition of realizing wireless CSI sensing.

Methods and apparatuses are described herein how Enhanced Multi-Link Multi-Radio (EMLMR) mode is enabled or disabled in a set of EMLMR links. In one example a beacon frame is received by a station (STA) from an access point (AP) that includes an extremely high throughput (EHT) Operation element including a Disabled Channel Bitmap Present subfield and an EHT Operation Information Present subfield. When the Disabled Channel Bitmap Present subfield is equal to 1, the EHT Operation Information Present subfield is also equal to 1, the STA receives a Disabled Channel Bitmap field indicated in an EHT Operation Information field to determine the allowed subchannels for enhanced multi-link multi-ratio (EMLMR) link(s). EMLMR mode may be enabled / disabled by way of an EML Operating Mode Notification frames and bit values in an EMLMR Bitmap subfield. Additional embodiments are disclosed.

The invention relates to a mine low-power-consumption wireless sensor network, and belongs to the technical field of wireless sensor networks and accurate positioning. The network comprises a sensor node used for collecting, caching and forwarding sensor data, and carrying out distance measurement and communication with other sensor nodes or gateway nodes through a UWB technology; the gateway nodes serve as an initiator and a manager of the wireless sensor network, periodically broadcast beacon frames, receive and converge sensor data, forward the data to the server, and send time synchronization data through the UWB technology to ensure that all the sensor nodes work on a unified time axis; the industrial Ethernet ring network is used for connecting the gateway node with the server; and the server is used for storing and processing the sensor data and generating a network topological relation. Wherein multi-hop transmission paths are formed between the sensor nodes and the gateway node and between the sensor nodes through wireless connection, and the network topology is dynamically generated based on UWB ranging between the nodes and supports redundant paths.

A communication method and a communication apparatus are provided. The method includes: broadcasting a beacon frame, where the beacon frame includes link information of a plurality of links, and the plurality of links are deployed on a plurality of devices in a multi-link network; and receiving a first association request from a terminal device, where the first association request indicates to associate with at least one of the plurality of links. In this solution, the plurality of devices form the multi-link network, the plurality of devices form a logical multi-link device, the multi-link network includes a plurality of links, and the terminal device may select one or more of the plurality of links for communication. Therefore, this solution has throughput and latency gains, and can improve communication efficiency.

The ad hoc network construction method based on double radio frequencies and Beacon custom broadcast is based on networking communication equipment, the equipment is provided with two sets of independent radio frequency modules, and one set of radio frequency module is configured to be in an STA mode; the other set of radio frequency module is configured as an AP; in the ad hoc network construction process, a plurality of networking devices diverge working channels of respective AP mode radio frequency modules through a negotiation mechanism, and after the working channels are determined, channel information to be used by the networking devices is packaged in a detection request frame to be sent; after the other AP equipment receives the channel selection information, the channel selection process is executed as well; and Beacon custom broadcasting and networking: the AP mode radio frequency module broadcasts the AP information connected with the current equipment in the STA mode through the custom information part in the sent Beacon frame, and the AP mode radio frequency module in the networking equipment broadcasts the AP information connected with the current equipment in the STA mode through the custom information part in the sent Beacon frame.

Various embodiments disclose passive directional multi-gigabit (DMG) sensing for object detection with millimeter Wi-Fi beacon frames. The DMG sensing comprises collecting a schedule of the multidirectional mmWave Wi-Fi beacon transmissions including times and directional sector of each mmWave packet in the directional beam training. Further, values of an occupancy map of an environment are evaluated statistically using a model connecting the schedule of the beacon transmissions with intra-packet measurements and inter-packet measurements of reflections of the multidirectional mmWave Wi-Fi beacon transmissions. These values of the occupancy map are then used to determine parameters of an object in the environment.

The invention discloses a distributed data transmission method for a low-voltage power station area. The method comprises the following steps: planning a channel and a time slot; clock synchronization; network access and configuration of distributed nodes; active acquisition and reporting; dual-mode link redundancy and conflict are avoided; and data aggregation and network maintenance. According to the invention, the technical problems of high data transmission delay, frequent channel conflicts and low single-mode communication reliability of the traditional power station area are solved, the master node realizes millisecond-level timing with the fusion terminal through an NTP / PTP protocol on the basis of the clock management module of the electric red operating system, a synchronous clock is broadcasted to the whole network site through a beacon frame, and the reliability of the single-mode communication is improved. The child nodes calibrate a local clock through a hardware timer, the time deviation of the whole network is ensured to be less than or equal to 10ms, a foundation is laid for distributed time slot distribution, and high-precision clock synchronization is realized.

A method is provided in which an AP of a MLD AP device may decide to include all out-of-link BSS parameters updates in a beacon frame (beacon). A flag is included in the beacon frame to indicate that all updates are included in the beacon frame and thus the client device that receives the beacon frame should not send probe request frames (probe requests) to obtain these updates. Thus, a non-AP MLD that receives a beacon frame with the above indication and that has all critical BSS parameters corresponding to the Change Sequence Number (CSN) that preceded the updates indicated by the AP, should not send probe requests to obtain the updated parameters. The number of bits to assign to the complete BSS Update Report Indication flag may vary depending on the number of updates to be reported.

The embodiment of the invention provides a time interval adjustment method and device, a storage medium and an electronic device.The time interval adjustment method comprises the steps that the working mode of routing equipment is determined, and a first adjustment strategy for a first time interval of the routing equipment is determined according to the working mode, and / or a second adjustment strategy for a second time interval of the routing device, the first time interval being a time interval of every two beacon frames to be broadcasted and sent by the routing device, the second time interval being a time interval of every two data packets to be wirelessly transmitted by the routing device, the first adjustment strategy being used for increasing the first time interval, and the second adjustment strategy being used for increasing the second time interval. The second adjustment strategy is used for increasing the second time interval; the first time interval is adjusted according to the first adjustment strategy, and / or the second time interval is adjusted according to the second adjustment strategy, and the problem that the power consumption and the transmission rate of the routing equipment are unbalanced in the prior art is solved.

A process for configuring a Wi-Fi channel includes selecting between puncturing the channel and reducing the channel's bandwidth to reduce channel interference based on continuously monitored channel conditions. The selecting includes performing successive operations of puncturing the channel and reducing channel bandwidth until channel interference is sufficiently reduced. The final channel configuration is announced, for example, by transmitting beacon frames with the final channel configuration. The process is repeated on a regular basis to adjust the channel configuration as channel conditions change. The process is also performed to provide a channel configuration to reduce channel interference that is present when responding to an association request.

A method includes that a first frame from a second electronic device may carry sending time information of the sent first frame, and the first frame is a device discovery beacon frame used for device discovery, a synchronization beacon frame used for synchronization, or a service discovery frame used for service discovery in Wi-Fi aware. After receiving the first frame, a first electronic device may determine a first transmission delay between the first electronic device and the second electronic device based on the sending time information of the first frame and a first time point at which the first frame is received.

The embodiment of the invention provides an ultra-wideband positioning method for offshore dispatching, a storage medium and a program product. The method comprises the following steps: controlling a beacon base station to periodically broadcast beacon frame signals to a plurality of ultra-wideband base stations so as to synchronize the time sequence of the plurality of ultra-wideband base stations; controlling the plurality of ultra-wideband base stations to receive radio signals transmitted by ultra-wideband tag equipment on the to-be-positioned target, so that the plurality of ultra-wideband base stations obtain first ranging data based on a first preset ranging algorithm and the radio signals; acquiring first ranging data from the plurality of ultra-wideband base stations; preprocessing the first ranging data to obtain second ranging data; acquiring offset vector data of the target to be positioned, wherein the offset vector data are equal at any moment in the same time slot; and determining position information of the to-be-positioned target by adopting a preset positioning system distance model based on the second distance measurement data, the coordinate information and the offset vector data. The method is used for realizing accurate positioning of the moving to-be-positioned target.