29 results about "Beacon interval" patented technology

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.

This disclosure provides methods, devices and systems for establishing and maintaining connectivity between access points (APs) that provide multiple BSSID sets and wireless stations (STAs) that do not support enhanced multiple BSSID advertisement (EMA). In some implementations, a wireless communication device may transmit a burst of beacon frames each carrying a respective partial list of nontransmitted BSSID profiles for a multiple BSSID set. In such implementations, the bursts of beacon frames may be transmitted periodically such that the start of each burst occurs one beacon interval after the start of a prior burst. In some other implementations, a wireless communication device may broadcast multiple beacon frames each carrying a full set of nontransmitted BSSID profiles associated with a respective multiple BSSID set. In such implementations, each beacon frame may be periodically broadcast every beacon interval.

Methods, systems, and devices for wireless communication at a multi-link device are described. A first multi-link device (MLD) may communicate with a second MLD in accordance with the techniques depicted herein. For instance, the second MLD may transmit an indication of at least a portion of a beacon interval timeline for communications between the second MLD and one or more first MLDs on a first radio frequency link. In some examples, the beacon interval timeline may include at least one of a beacon transmit interval, and one or more service periods, channel access over a second radio frequency link being via the one or more service periods. A service period may be scheduled for communications on the second radio frequency link. The second MLD may then communicate in accordance with at least one of the beacon transmit interval and the one or more service periods.

Embodiments of the present disclosure relate to channel allocation for ranging between access points during a beacon interval. Examples described herein provide for channel allocation for ranging between network devices in a network during a beacon interval. Examples described herein can allocate a plurality of channels to a plurality of network devices based on a plurality of channel allocation permutations, and initiate ranging measurements between the plurality of network devices on the plurality of channels based on each channel allocation permutation during the beacon interval to generate ranging results.

Systems and methods for detecting node outages in a mesh network are disclosed. A tracking node in the mesh network detects a set of signals originating from a tracked node in the mesh network. The set of signals includes beacons or communication messages sent by the tracked node. The tracking node determines that a threshold number of beacon intervals have elapsed since a most recent signal was received from the tracked node. The tracking node performs an outage verification based on data received from another node in the mesh network and updates a state of the tracked node. Based on the updated state, the tracking node outputs a probe to the tracked node, which requests a response to the probe. When no response to the probe is received from the tracked node, the tracking node sends an outage alert message to a next topology higher layer of the mesh network.

This disclosure describes systems, methods, and devices related to unavailability conditions. A device may receive one or more requests for association from a plurality of stations (STAs), while operating in a mode that allows unavailability. The device may broadcast an indication of the mode of operation to the plurality of STAs, using beacon frames, association frames, or probe response frames. The device may advertise a change in the mode of operation, including a countdown to the change, based on beacon intervals. The device may cause to send information to the plurality of STAs about expected unavailability periods.

Enhanced R-TWT scheduling is performed in which the R-TWT scheduling AP can perform scheduling quickly to react quickly to changes in the network environment and optimize R-TWT scheduling for efficiency and stability. The R-TWT scheduling AP transmits R-TWT trigger frames and is able to collect information from R-TWT scheduled STAs which may affect R-TWT scheduling. The scheduling can take into account that some member STAs may be dozing (asleep) for several beacon intervals and do not wake up for the beacon, then the R-TWT scheduling AP initiates the update of parameters when needed to check on those STAs to determine if any updates are needed. The R-TWT trigger frame can allocate resource units (RU) for R-TWT scheduled STAs to communicate back to the R-TWT scheduling AP.

Methods, systems, and devices for wireless communication at a multi-link device are described. A first multi-link device (MLD) may communicate with a second MLD in accordance with the techniques depicted herein. For instance, the second MLD may transmit an indication of at least a portion of a beacon interval timeline for communications between the second MLD and one or more first MLDs on a first radio frequency link. In some examples, the beacon interval timeline may include at least one of a beacon transmit interval, and one or more service periods, channel access over a second radio frequency link being via the one or more service periods. A service period may be scheduled for communications on the second radio frequency link. The second MLD may then communicate in accordance with at least one of the beacon transmit interval and the one or more service periods.

Proposed are a method and a device for receiving information on a beacon interval of another AP in a transmitting MLD in a WLAN system. Specifically, a receiving MLD receives an ML element from a transmitting MLD through a first link. The receiving MLD decodes the ML element. The transmitting MLD includes a first transmitting STA operating in the first link and a second transmitting STA operating in a second link. The ML element contains common information and link information. The link information includes information about a beacon interval of the second transmitting STA.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may transmit a channel switch announcement indicating a time by which a channel switch is to occur, wherein the time for the channel switch is less than a beacon interval from the time by which the channel switch announcement is transmitted. The wireless communication device may perform the channel switch in accordance with the channel switch announcement. Numerous other aspects are described.

Proposed are a method and a device for receiving information on a beacon interval of another AP in a transmitting MLD in a WLAN system. Specifically, a receiving MLD receives an ML element from a transmitting MLD through a first link. The receiving MLD decodes the ML element. The transmitting MLD includes a first transmitting STA operating in the first link and a second transmitting STA operating in a second link. The ML element contains common information and link information. The link information includes information about a beacon interval of the second transmitting STA.

The present disclosure provides methods, assemblies, devices, and systems for flexible beacon interval operation. Some aspects more specifically relate to including indications of static and dynamic beacon intervals in beacon frames and other frames. In some examples, an AP may transmit a frame including a plurality of indications of a plurality of beacon intervals, such as an indication of a static beacon interval and an indication of a dynamic beacon interval. The AP may then transmit a frame, such as a beacon frame, at a time associated with the beacon interval.

Examples described herein provide ranging by a network device during a beacon interval. Examples described herein can discover, by a network device during a first beacon interval, a plurality of APs capable of ranging and a received signal measurement of each of the plurality of APs. Examples described herein can select, by the network device, an AP of the plurality of APs having a strongest received signal measurement; determine, by the network device, whether the selected AP is available for ranging; and initiate, by the network device during a second beacon interval, a ranging measurement with the selected AP based on a determination that the selected AP is available for ranging to generate a ranging result. Examples described herein can resolve locations of the plurality of APs based on the ranging result.

Methods and systems are described for managing SSIDs in a wireless network. An AP providing wireless communications may determine that there is high or low network traffic associated with one of its SSIDs. For example, a high or low number of computing devices may be probing the AP on a particular SSID. The AP may enable or disable the SSID on additional channels, increase or decrease its beacon interval, and / or increase or decrease its beacon physical layer (PHY) data rate in order to provide probing computing devices with greater or less access to the SSID based on the network activity. The AP may scan its channels for network activity and determine the appropriate changes to its SSIDs in order to improve access to heavily used SSIDs or to free up resources.

A procedure (400) comprising the following: Detect (410) by a network device (100) during a first beacon interval, a plurality of access points (APs) on a first channel capable of ranging and receiving signal measurement from each of the plurality of APs on the first channel; Determine, by the network device, a set of APs from the multitude of APs on the first channel that have not yet performed ranging; Select (415), by the network device, one AP with the strongest received signal measurement among the set of APs on the first channel; Determine (420) through the network device whether the selected AP is available for ranging; Based on a determination that the selected AP is available for ranging, the network device initiates (425) ranging measurements with the selected AP on the first channel during a second beacon interval to produce a ranging result; based on the ranging result, Determine (430), by the network device, of locations of the plurality of APs on the first channel, wherein determining the locations of the plurality of APs on the first channel includes estimating the locations of the plurality of APs on the first channel on an AP map.

The technical features of the present disclosure may relate to a method or apparatus performed in a wireless local area network (WLAN) system. For example, the method of the present disclosure comprises a step in which a non-access point (non-AP) station (STA) receives a relay beacon frame from a relay STA. For example, the relay beacon frame comprises a medium access control (MAC) header including a frame control field, and a frame body. For example, the frame control field comprises at least one of a type field and a subtype field, which have a pre-set value for identifying the relay beacon frame. For example, the frame body comprises information about a relay beacon interval for the relay beacon frame. For example, the relay beacon interval is set to be shorter than a beacon interval of a beacon frame transmitted from an access point (AP).

This disclosure provides methods, components, devices and systems for advanced notification of critical updates. Some aspects more specifically relate to transmission of an indication of a critical update at least a threshold duration prior to the critical update occurring, where the indication of the critical update includes a time at which the critical update is to occur. In some implementations, the time at which the critical update is to occur may be indicated via a difference between a time at which the indication of the critical update is received and the time at which the critical update is to occur, via a quantity of beacon intervals, via an absolute time reference, or any combination thereof. Additionally, or alternatively, the indication of the critical update may include an indication of one or more communication links for which the critical update applies, additional information about the critical update, or both.

This disclosure provides methods, components, devices and systems for flexible beacon interval operation. Some aspects more specifically relate to inclusion of indications of static and dynamic beacon intervals in beacon frames, and other frames. In some examples, an AP may transmit a frame including multiple indications of multiple beacon intervals, such as an indication of a static beacon interval and an indication of a dynamic beacon interval. The AP may then transmit frames, such as beacon frames, at times associated with the beacon intervals.

The embodiment of the invention discloses a method and device for preventing an STA from being disconnected, a storage medium and an AP, and relates to the field of wireless communication. The method comprises the following steps that: an AP (Access Point) firstly acquires the monitoring intervals of all STAs (Station) in a low-power-consumption mode, determines the maximum monitoring interval and calculates the integral multiple LI of the maximum monitoring interval and a Beacon interval; setting an aggregation constraint interval length of a basic time interval formed by LI Beacon intervals; and when a trigger signal is detected, sequentially setting an aggregation frame sending interval, a block acknowledgement frame receiving interval and a Beacon frame sending interval in the LI basic time intervals of the aggregation constraint interval, and limiting the interval length between the end of the aggregation frame sending interval and the start of the Beacon frame sending interval. And after data transmission is completed, waiting for a next trigger signal appearing according to a Tlos / n period. According to the method, the problem that the STA in the low-power-consumption mode is disconnected due to the fact that the sending duration of the aggregation frame is too long is effectively avoided, and the stability of data transmission and the communication continuity are guaranteed.

Methods and systems are described for managing SSIDs in a wireless network. An AP providing wireless communications may determine that there is high or low network traffic associated with one of its SSIDs. For example, a high or low number of computing devices may be probing the AP on a particular SSID. The AP may enable or disable the SSID on additional channels, increase or decrease its beacon interval, and / or increase or decrease its beacon physical layer (PHY) data rate in order to provide probing computing devices with greater or less access to the SSID based on the network activity. The AP may scan its channels for network activity and determine the appropriate changes to its SSIDs in order to improve access to heavily used SSIDs or to free up resources.

A target AP provides a neighbourhing AP with information about a TWT schedule in the target BSS, together with additional information such as a Buffer Status Report (BSR) of the target first BSS, a low latency data scheme of the target BSS reporting one or more prioritized TID in the target BSS, a SP splitting scheme of the TWT SPs reporting a breakdown of a service period (SP) within a Beacon interval of the target BSS, a reciprocal OBSS TWT indication reporting an agreement of the target AP to provide a second OBSS TWT schedule in the target BSS timely aligned with a second TWT schedule in the second BSS. The neighbouring AP can then configure an OBSS TWT schedule in its BSS based on the received information, to protect the TWT schedule of the target BSS. The OBSS TWT schedule is timely aligned with the TWT schedule.

In general, various aspects of the present disclosure relate to wireless communications. In some aspects, a wireless communication device may transmit a channel switch advertisement indicating a time at which a channel switch will occur, where the time for the channel switch is less than a beacon interval from the time at which the channel switch advertisement is transmitted. The wireless communication device may perform channel handover according to the channel handover advertisement. Numerous other aspects are described.

This disclosure provides methods, components, devices and systems for advanced notification of critical updates. Some aspects more specifically relate to transmission of an indication of a critical update at least a threshold duration prior to the critical update occurring, where the indication of the critical update includes a time at which the critical update is to occur. In some implementations, the time at which the critical update is to occur may be indicated via a difference between a time at which the indication of the critical update is received and the time at which the critical update is to occur, via a quantity of beacon intervals, via an absolute time reference, or any combination thereof. Additionally, or alternatively, the indication of the critical update may include an indication of one or more communication links for which the critical update applies, additional information about the critical update, or both.

The invention belongs to the technical field of positioning detection, and particularly relates to a UWB-based underground positioning method and system. The beacons broadcast and send UWB positioning signals according to the arrangement position sequence, and after the beacons receive the UWB positioning signals sent by the previous beacons, the beacons broadcast and send the UWB positioning signals of the beacons themselves; the beacons are arranged in an underground roadway covering a fully-mechanized face at intervals and located on the same side, and the position of each beacon is known; the positioning card receives UWB positioning signals sent by the beacons in a broadcast mode, the positioning card judges based on the received UWB positioning signals sent by the two adjacent beacons, and if the product of the time difference of the received two adjacent UWB positioning signals and the electromagnetic wave propagation speed of the UWB positioning signals is larger than 0 and smaller than twice the distance between the two adjacent beacons, the positioning card sends the UWB positioning signals to the positioning card. If not, the position of the positioning card is determined based on the time difference of the received two adjacent UWB positioning signals and the position of the beacon, so that high-precision and low-cost underground positioning is realized at the same time.

Disclosed are a listen interval-based transmission or reception method and device for an access point (AP) multi-link device (MLD) supporting power saving (PS) in a wireless LAN system. The method according to an embodiment of the present disclosure may comprise the steps in which: a non-AP station (STA) affiliated with a non-AP MLD receives, from one or more APs affiliated with an AP MLD, at least one of first information related to whether a PS mode is supported or second information related to whether the PS mode is enabled; and the non-AP STA determines a listen interval on the basis of one or more beacon intervals related to the one or more APs.

A low power Wi-Fi device that executes the Matter protocol is disclosed. The Wi-Fi device changes its mode of operation based on the status of the Matter protocol. The device monitors the state of Matter subscriptions. Until one or more subscriptions are established, the low power Wi-Fi device operates in DTIM mode, wherein the device wakes for every DTIM beacon. Once a subscription is established, the low power Wi-Fi device operates in Listening Interval mode, wherein the device wakes once per listening interval. The listening interval is a multiple of the beacon interval and is greater than the DTIM beacon interval. This transition reduces the power consumption of the device.

A method performed by a non-access point (AP) multi-link device (MLD) is disclosed. The method according to one embodiment of the present disclosure comprises the steps of: receiving, by a first station (STA) affiliated to a non-AP MLD, a first frame from an AP MLD, the first frame including first information related to a current mode of a first AP affiliated to the AP MLD and second information related to a state of the first AP; and decoding the first frame by the first STA, wherein a listen interval between the non-AP MLD and the AP MLD is based on at least one beacon interval of at least one AP among a plurality of APs included in the AP MLD, and wherein a mode of the at least one AP may be at least one of an active mode and a dynamic power saving (PS) mode.

Methods and apparatus are provided that enable an AP MLD to indicate to one or more non-AP MLDs their recommended wake-up times on one or more links. In some embodiments, the recommended wake-up time may be continued for at least one STA over a prescribed number of intervals. Features are also provided for the STA to request wake-up time recommendations from the AP as well as rules that the STA adheres to. In one aspect of the present disclosure, an AP transmits a wakeup time recommendation element (WTRE) in a beacon interval. The WTRE includes a recommendation to recommend one, multiple, or all stations to postpone their wake-up time to a recommended wake-up time, rather than an immediate wake-up time.

This disclosure provides methods, components, devices and systems for flexible beacon interval operation. Some aspects more specifically relate to inclusion of indications of static and dynamic beacon intervals in beacon frames, and other frames. In some examples, an AP may transmit a frame including multiple indications of multiple beacon intervals, such as an indication of a static beacon interval and an indication of a dynamic beacon interval. The AP may then transmit frames, such as beacon frames, at times associated with the beacon intervals.