Abstract: A method includes: sending, by an AP, a channel measurement notification message, where the channel measurement notification message includes a STA indication and a to-be-measured channel indication; receiving, by the AP, channel sounding signals sent by M STAs, where the M STAs that need to measure a channel are divided into W groups, N STAs in a same group simultaneously send channel sounding signals on a same sub-channel in the V to-be-measured sub-channels, the channel sounding signal includes a plurality of subcarriers, every Ng consecutive subcarriers are a group of subcarriers, each STA in each group occupies a subcarrier at a fixed location in each group of subcarriers, and subcarriers that are occupied by the N STAs in the same group and that are in a same group of subcarriers are different from each other.

Abstract: Embodiments of the present invention disclose a method for controlling device-to-device discovery. The method includes: obtaining, by a network device, N first relay function parameter sets of N user equipment supporting a relay function; obtaining, by the network device, a second relay function parameter set of remote user equipment; determining, by the network device for the remote user equipment, at least one of the N user equipment supporting the relay function; and sending, by the network device, a first notification message to the at least one user equipment supporting the relay function, to trigger the at least one user equipment supporting the relay function to initiate a device-to-device discovery process.

Abstract: A transmission control method includes generating, by a first device, transmission control information, and sending the transmission control information to the second device. The transmission control information includes resource indication information, compression indication, and first indication. The resource indication information indicates a transmission resource allocated by the first device to a second device. The transmission resource includes at least two symbols. The compression indication indicates a numerology of a specific symbol in the transmission resource. The specific symbol includes at least an end symbol or a second symbol. The end symbol is the last symbol in the transmission resource. The second symbol is a symbol in the transmission resource and is used for transmitting only a demodulation reference signal or a long training field. The second symbol includes at least one symbol.

Abstract: Embodiments of this application provide an information transmission method and apparatus. The method includes: determining, by a network device, first indication information, where the first indication information is used to indicate a configuration of a second resource, the second resource is used to transmit retransmission data including retransmission data of first data, the first data is data sent by a first terminal device by using a first resource unit, the first resource unit belongs to a preconfigured first resource, the first resource and the second resource are both grant-free resources and are different from each other, and the first indication information is determined by the network device based on a receiving status of the first data; and sending, by the network device, the first indication information. Therefore, resource configuration flexibility can be improved.

Abstract: A data transmission method and a device relate to the field of communication technologies and to a problem of resource waste when demodulation reference signal (DMRS) symbols account for a large proportion in orthogonal frequency division multiplexing (OFDM) symbols included in a subframe. The method includes receiving, by a network device, uplink data from N terminal devices in a time division multiplexing (TDM) manner, where the uplink data includes a DMRS of each of the N terminal devices, the N terminal devices share a target OFDM symbol, the target OFDM symbol transmits the DMRS of each of the N terminal devices, and N?2, and performing, by the network device, channel estimation on an uplink channel of each of the N terminal devices based on the DMRS of each of the N terminal devices to obtain corresponding uplink data of each of the N terminal devices through parsing.

Abstract: Embodiments provide a switching threshold setting method and apparatus, and a device, applied to a wireless local area network. A switching threshold of a terminal and a switching threshold of a wireless access device that match each other are set, so that when the wireless access device is to release an association with the terminal, the terminal has started roaming to find a target wireless access device.

Abstract: Embodiments of the present disclosure relate to a grant-free uplink transmission method and apparatus. The method includes: determining, based on received configuration information, a target grant-free transmission area and a target air interface transmission parameter corresponding to the target grant-free transmission area, where the target grant-free transmission area is an air interface time-frequency resource formed by using a specified time range and frequency range, and the configuration information includes at least one grant-free transmission area and an air interface transmission parameter corresponding to each grant-free transmission area; and sending uplink data to a base station based on the target grant-free transmission area and the target air interface transmission parameter. In this application, it can be provided that the base station can correctly receive the uplink data.

Abstract: The present disclosure includes example signal sending and receiving methods and related example devices. One example method includes sending, by a first device, a notification signal to a second device on a target transmission resource, where the target transmission resource includes a third transmission resource determined according to a first transmission resource or a fourth transmission resource determined according to a second transmission resource. The first transmission resource is a resource which the first device uses to send first status information of the first device, and the second transmission resource is a resource which is used by the second device to send second status information of the second device.

Abstract: A method for sending a wake-up frame includes generating, by a sending device, a plurality of short wake-up frames, where each of the plurality of short wake-up frames includes an index and an address segment. The index is used to indicate a number of the address segment, the plurality of short wake-up frames include at least N short wake-up frames whose indexes are different from each other, N is a positive integer, and N?2. The method further includes sending, by the wake-up device, the plurality of short wake-up frames so that a receiving device can determine, based on N address segments carried in any N short wake-up frames whose indexes are different from each other in the plurality of short wake-up frames, whether the receiving device is a target wake-up device of the sending device.

Abstract: A method for method for waking up one of a plurality of radio communications modules (RCMs) of a first station includes receiving a wake-up configuration from a second station, placing the plurality of RCMs into a sleeping mode, receiving a wake-up signal from the second station on an auxiliary low-power radio receiver of the first station, determining a first RCM of the plurality of RCMs to wake up in accordance with the wake-up configuration, and waking up the first RCM from the sleeping mode to communicate with the second station.

Abstract: A BA frame transmission method comprises: receiving, by a receiving device, at least one PPDU sent by at least one transmitting device, where the PPDU includes at least one MPDU; and generating a BA frame according to a receiving status of the at least one MPDU in the at least one PPDU sent by each of the at least one transmitting device, and sending the BA frame to the at least one transmitting device, where the BA frame includes BA information corresponding to each of the at least one transmitting device, the BA information includes a block acknowledgement bitmap field and a bitmap length indicator, the bitmap length indicator is used to indicate a length of the block acknowledgement bitmap field, and the bitmap length indicator is carried in a block acknowledgement starting sequence control field included in the BA information corresponding to the transmitting device in the BA frame.

Abstract: A method for indicating a frame structure in a wireless local area network (WLAN) is provided. A sending device generates a transmission frame. The transmission frame includes a physical header. The physical header includes a frame structure indication. A subcarrier polarity of the frame structure indication is used to indicate a frame structure of the transmission frame. The sending device sends the transmission frame to a receiving device. In the transmission frame, a first subcarrier polarity indicates the transmission frame has a first frame structure, in which the physical header includes a field and a time domain repetition of the field; and a second subcarrier polarity indicates the transmission frame has a second frame structure, in which the physical header includes the field but does not include the time domain repetition of the field. The frame structure indication is an orthogonal frequency division multiplexing (OFDM) symbol.

Abstract: Embodiments of the present invention disclose a method for controlling device-to-device discovery. The method includes: obtaining, by a network device, N first relay function parameter sets of N user equipment supporting a relay function; obtaining, by the network device, a second relay function parameter set of remote user equipment; determining, by the network device for the remote user equipment, at least one of the N user equipment supporting the relay function; and sending, by the network device, a first notification message to the at least one user equipment supporting the relay function, to trigger the at least one user equipment supporting the relay function to initiate a device-to-device discovery process.

Abstract: A method includes: determining, by an access point based on remaining quantities of electricity and/or location information of all stations in at least one station group in a basic service set, an identifier of a type-1 station in each of the at least one station group and available time window information that corresponds to each type-1 station, and generating a notification message including relay enabling information of the at least one station group, relay enabling information of each station group includes identifiers of at least two type-1 stations in the station group and the available time window information of each type-1 station; and broadcasting, by the access point, the notification message in the basic service set.

Abstract: A method includes: sending, by an AP, a channel measurement notification message, where the channel measurement notification message includes a STA indication and a to-be-measured channel indication; receiving, by the AP, channel sounding signals sent by M STAs, where the M STAs that need to measure a channel are divided into W groups, N STAs in a same group simultaneously send channel sounding signals on a same sub-channel in the V to-be-measured sub-channels, the channel sounding signal includes a plurality of subcarriers, every Ng consecutive subcarriers are a group of subcarriers, each STA in each group occupies a subcarrier at a fixed location in each group of subcarriers, and subcarriers that are occupied by the N STAs in the same group and that are in a same group of subcarriers are different from each other.

Abstract: Embodiments of the present invention disclose a Wi-Fi ranging method including: receiving, by a target node, a first NDP sent by a reference node and recording a first NDP receiving time of receiving the first NDP, and sending a second NDP to the reference node and recording a second NDP sending time of sending the second NDP; receiving, by the target node, a ranging response frame sent by the reference node, where the ranging response frame includes a first NDP sending time at which the reference node sends the first NDP and a second NDP receiving time at which the reference node receives the second NDP; and calculating, by the target node, a distance between the target node and the reference node based on the first NDP receiving time, the second NDP sending time, the first NDP sending time, and the second NDP receiving time.

Abstract: Embodiments provide a switching threshold setting method and apparatus, and a device, applied to a wireless local area network. A switching threshold of a terminal and a switching threshold of a wireless access device that match each other are set, so that when the wireless access device is to release an association with the terminal, the terminal has started roaming to find a target wireless access device.

Abstract: A method for anchor master selection includes: a device receives a NAN Beacon frame, where the NAN Beacon frame carries first AM information and first TSF information, and the first AM information includes: a first AMR, a first HC, and a first AMBTT; if the NAN Beacon frame is used for AM selection, when the first AMR is less than a second AMR and an MR of the device is greater than the first AMR, switching a role of the device to AM, where second AM information recorded in the device includes: the second AMR, a second HC, and a second AMBTT; and if the NAN Beacon frame is used for AM selection, when the first AMR is less than the second AMR, and the MR of the device is less than the first AMR, updating the second AM information and second TSF information according to the NAN Beacon frame.

Abstract: An information query method, including sending, by a first device, a data-excluded information query request frame, where the data-excluded information query request frame includes first control information and a first hash value; receiving, by the first device, a data-excluded information query response frame sent by a second device. The data-excluded information query response frame includes second control information, a second hash value, and an address of the second device. The method also includes sending, by the first device, a data-contained information query request frame to the second device when the first device determines that a third hash value is consistent with the second hash value, so that the second device responds to the data-contained information query request frame when receiving the data-contained information query request frame. Correspondingly, the present disclosure further provides a related device.

Abstract: The present disclosure provides a channel measurement method and a STA to ensure that a sub-channel on which channel measurement is performed is idle, thereby preventing, to some extent, transmission in an OBSS from being affected by UL channel measurement. The method includes: receiving, by a station STA, a measurement notification message sent by an access point AP, where the measurement notification message carries identifier information of a channel that needs to be measured; and sending, by the STA, a sounding reference signal by using M idle sub-channels, so that the AP measures the M idle sub-channels according to the received sounding reference signal, where the M idle sub-channels are M idle sub-channels determined by the STA from at least one sub-channel included in a channel indicated in the identifier information of the channel that needs to be measured, and M is an integer greater than or equal to 1.