446 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.

This disclosure provides systems, methods, and apparatuses for wireless communication. An example wireless communication device broadcasts a first beacon frame over a first communication link of an access point (AP) multi-link device (MLD) (AP MLD), and broadcasts a second beacon frame over a second communication link of the AP MLD. The first beacon frame indicates transmission of group data over the first communication link, and the second beacon frame indicates transmission of the group data over the second communication link. The wireless communication device transmits the group data, concurrently over the first and second communication links, to one or more wireless stations (STAs). Another example wireless communication device obtains one or more beacon frames indicating buffered group data in an AP MLD for at least the wireless communication device, selects one or more group communication links, and obtains the group data over the one or more selected group communication links.

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.

Systems and techniques are provided for wireless communications. A process can include determining, based on an estimated vertical position of a user equipment (UE) and a configured average floor height value, a floor level estimate corresponding to the UE. A Downlink Received Signal Strength Indicator (DL-RSSI) value associated with a respective beacon frame received by the UE from each access point (AP) of a plurality of APs can be determined. A first AP group can include a first subset of the plurality of APs associated with DL-RSSI values greater than a threshold, and a second AP group can include a second subset of the plurality of APs associated with DL-RSSI values less than the threshold. The floor level estimate corresponding to the UE can be validated based on a comparison between the floor level estimate and respective floor level information associated with the first AP group.

During operation, an electronic device may perform, using a scanning radio, a scan of a band of frequencies, where the scanning radio only receives frames. Then, the electronic device may receive, using the scanning radio, a beacon frame associated with a second electronic device, where the beacon frame includes information associated with operation of a third electronic device in a second band of frequencies. Next, the electronic device may perform, using a data radio, a second scan of the second band of frequencies based at least in part on the information, where the data radio transmits and / or receives second frames, and where the second scan is performed, at least in part, while the scan is performed. Note that the electronic device may not be associated with (or may not have a connection with) the second electronic device and / or the third electronic device.

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.

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 invention discloses a PCS parallel operation clock synchronization method, a storage medium and a PCS parallel operation system.The PCS parallel operation clock synchronization method comprises the steps that carrier signals are extracted from a power line, and beacon frames in the carrier signals are extracted; and updating the local time according to the timestamp information of the beacon frame so as to realize clock synchronization. According to the method, the problems of poor expansibility and relatively high delay in the prior art are solved through a broadband power line carrier technology, and a high-precision beacon timestamp is provided; the energy storage converters in the parallel operation state can update the local time of the energy storage converters through the timestamp information so as to realize high-precision clock synchronization.

This disclosure provides methods, components, devices and systems for enhancements to request to send (RTS) and clear to send (CTS) exchanges. A first wireless device may receive a beacon frame indicating for the first wireless device to monitor a first channel for a first frame that schedules communication via one or more channels. The first wireless device may receive, from a second wireless device, the first frame indicating a channel bandwidth and a puncturing pattern of multiple available puncturing patterns for the channel bandwidth. The puncturing pattern may be associated with a first subset of a set of multiple channels of the channel bandwidth. The first wireless device may transmit, to the second wireless device, a second frame indicating that a second subset of channels is available and may receive one or more data packets via the second subset of channels.

The invention discloses a wireless sensing method and device, and belongs to the technical field of sensing. An AP in a WLAN transmits a beacon frame with a first antenna and receives a reverberation signal with a second antenna, the reverberation signal being obtained by reflection or scattering of the beacon frame. And then the AP performs environment perception according to the received echo signal. According to the method and the device, the capability that the AP can receive and send messages by itself is utilized, the beacon frame is sent by the same AP and the echo signal of the beacon frame is received, and compared with the AP, the signal receiving and sending position is always known, so that the environment sensing precision is improved, the deployment position of the AP is not limited, and the method and the device can be flexibly applied to various scenes. In addition, the beacon frame is periodically transmitted to declare the presence of the AP. Therefore, the AP realizes environmental perception by using the beacon frame without additional packet sending, channel resources can be saved, environmental perception can be completed in a normal communication process, and integration of communication and perception 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.

The invention discloses a WLAN (Wireless Local Area Network) management frame transmission method and device and a WLAN, and belongs to the technical field of wireless communication. The AP sends a first operation type management frame, the frame body of the first operation type management frame comprises a first encryption field, the first encryption field is encrypted by a first key, and the first operation type management frame is a beacon frame, a detection response frame, an authentication response frame, an association response frame or a re-association response frame. According to the embodiment of the invention, the first key is preset in the AP, so that the AP can encrypt the frame body of the sent first operation type management frame by using the preset first key, thereby realizing encrypted transmission of the management frame sent by the AP before successful association between the AP and the STA, and improving the safety of WLAN communication.

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 wireless communication method includes receiving, by a first STA, a beacon frame or a probe response frame, from a first AP. The first STA may be a type 1 STA affiliated with a non-AP multi-link device (MLD). The first AP may be a type 1 AP affiliated with an AP MLD that has zero or at least one affiliated type 2 AP. The beacon frame or the probe response frame may include a target beacon transmission time (TBTT) information field, a multi-link control field, and / or a common information field.

A non-access point (AP) multi-link device operating in a first link and a second link is disclosed. The non-AP multi-link device comprises a transmission / reception unit and a processor. The processor receives a beacon frame or a probe response frame from an AP multi-link device operating in the first link and the second link, determines a traffic identifier (TID) mapped to the first link and the second link according to TID-to-Link mapping indicated by the beacon frame or the probe response frame, and performs transmission in the first link or the second link according to the TID mapped to the first link and the second link.

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.

The invention discloses a wireless body area network transmission rate optimization method based on a cooperative game. The method comprises the following steps: S1, constructing a basic model; s2, performing parameter definition on a Nash bargaining model based on a cooperative game; s3, constructing a utility function based on a Nash bargaining model and parameters; s4, solving a Nash bargaining solution based on the utility function; s5, designing an MAC protocol based on the general solution of the transmission rate; and after receiving the beacon frame, the sensor node adopts a corresponding strategy to access a channel according to the priority. In the GTS stage, the sensor nodes with the priorities of P1 and P2 only transmit data in the distributed time slots, so that high reliability of data transmission is ensured. In the competition access stage CAP, all the sensor nodes perform channel competition by adopting a CSMA / CA strategy based on the priorities of the sensor nodes, so that network resources are effectively utilized. Through a dynamic priority scheduling and resource allocation strategy, the coordinator can flexibly cope with the change of the network state, and the high efficiency and reliability of the wireless body area network in various application scenarios are ensured.

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 a wireless local area network system, which comprises a plurality of access points, BSSIDs carried by beacon frames sent by the plurality of access points are the same, and the beacon frames are sent by adopting relatively high modulation orders. For example, the plurality of access points include a first access point and a second access point; the first access point is used for sending a first beacon frame, the first beacon frame is modulated by adopting a first modulation order and comprises a first BSSID, the second access point is used for sending a second beacon frame, the second beacon frame is modulated by adopting a second modulation order and comprises the first BSSID. The first modulation order and the second modulation order are both higher than or equal to a modulation order threshold. Thus, if the signal strength of the beacon frame sent by the access point is weak, the terminal cannot receive the beacon frame from the access point, so that the roaming process cannot be triggered due to the weak signal strength of the received beacon frame, and the service transmission delay is reduced.

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.

This application provides a clock signal processing method, and is applied to the field of wireless communication. The clock signal processing method includes the following steps: A first AP receives first indication information from an AC. The first AP uses the first indication information as a trigger signal, and modifies first clock information of a first time counter based on a beacon beacon interval, to obtain second clock information. A minimum difference between the second clock information and N×BI is less than a minimum difference between the first clock information and N×BI. N×BI is an integer multiple of the beacon interval. The first AP sends a first beacon frame. The first beacon frame includes the second clock information.

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.

This disclosure provides methods, components, devices and systems for enhancements to request to send (RTS) and clear to send (CTS) exchanges. A first wireless device may receive a beacon frame indicating for the first wireless device to monitor a first channel for a first frame that schedules communication via one or more channels. The first wireless device may receive, from a second wireless device, the first frame indicating a channel bandwidth and a puncturing pattern of multiple available puncturing patterns for the channel bandwidth. The puncturing pattern may be associated with a first subset of a set of multiple channels of the channel bandwidth. The first wireless device may transmit, to the second wireless device, a second frame indicating that a second subset of channels is available and may receive one or more data packets via the second subset of channels.