Abstract:
The embodiments of the present disclosure disclose a method for uplink multiuser data transmission and a system for uplink multiuser multiple input multiple output. The method includes: sending, by an access point AP, indication information to at least two stations STAs, wherein the indication information is used for indicating that the at least two STAs perform an uplink multiuser data transmission; receiving, by the AP, uplink data sent by the at least two STAs through channels from the at least two STAs to the AP, respectively; and demodulating, by the AP, the uplink data sent by the at least two STAs using receiving beams corresponding to pre-estimated channels from the at least two STAs to the AP, respectively. According to the embodiments of the present disclosure, the AP receives the uplink data from multiple STAs through different channels from the STAs to the AP respectively, and demodulates data using the receiving beams corresponding to the channels respectively, thereby realizing that the ap perform separation and demodulation of the uplink data sent by multiple STAs and realizing the uplink multiuser data transmission.
Abstract:
Embodiments of the present invention provide a communication method, apparatus and system for multiple access points. The method includes: simultaneously sending, by a primary sending terminal and a secondary sending terminal, data corresponding to each receiving terminal to each receiving terminal through a shared channel; sending, by the primary sending terminal, BAR corresponding to the data to each receiving terminal; receiving, by the primary sending terminal, BA corresponding to the BAR and sent by each receiving terminal; and if the BA indicates that the data are correctly received by each receiving terminal, clearing the data cached in the primary sending terminal, and if the BA indicates that the data is not correctly received by each receiving terminal, retransmitting data which is not correctly received, and clearing correctly received data cached in the primary sending terminal.
Abstract:
The present invention discloses a method, device, and system for transmitting channel information, pertaining to the field of radio communication. The method for obtaining channel information includes: transmitting, by a beamformer, a request for obtaining channel information to a beamformee within the duration of a current first TXOP; receiving a null feedback frame transmitted by the beamformee within the duration of the current first TXOP; within the validity period of the channel information, if the beamformer obtains a second TXOP, transmitting, within the second TXOP, a channel information indication frame to request the channel information, and receiving the channel information transmitted by the beamformee. The system includes a beamformer and a beamformee. The present invention saves the signaling resources of the beamformer and reduces the power consumption of the beamformee.
Abstract:
Embodiments of the present disclosure provide a link adaptation feedback method, including: receiving, by a transmitting device, a link adaptation feedback frame sent by a communication peer end, where the link adaptation feedback frame includes a modulation and coding scheme feedback request sequence identifier (MSI), where the MSI is configured to indicate space-time block coding type information; determining, according to the space-time block coding type indication information, use information about use of space-time block coding by a data frame related to the link adaptation feedback frame, and selecting, according to the use information, a space-time stream, modulation and coding scheme used when the transmitting device sends a data frame.
Abstract:
Embodiments of the present invention disclose a method and an apparatus for retrieving transmit opportunity control in reverse direction grant, so that a conflict occurring between a case where an RD Initiator continues sending another frame to an RD Responder after retrieving TXOP control and a case where a terminal other than the RD Initiator sends a block acknowledgement to the RD Responder can be avoided. The method provided in the embodiments of the present invention includes: when an RD Initiator fails to correctly demodulate a frame sent by an RD Responder, retrieving, by the RD Initiator, TXOP control by using a PIFS if it is impossible for the RD Responder to enable an MU-MIMO mode, and retrieving, by the RD Initiator, the TXOP control by using a duration if it is possible for the RD Responder to enable the MU-MIMO mode, where the duration is longer than the PIFS.
Abstract:
This application provides a data transmission method and an apparatus. The method includes: A transmit end obtains to-be-sent data; the transmit end obtains a plurality of data blocks based on the to-be-sent data; and the transmit end compresses a first data block based on a compression mode and sends a compressed first data block, where the first data block is one of the plurality of data blocks. Therefore, a plurality of data blocks may be separately compressed by using a same compression mode or different compression modes, and compressed data blocks are sent.
Abstract:
Frequency channel numbers used for sensing are determined from M sensing resource blocks; and a sensing signal is sent on the frequency channel numbers used for sensing. The M sensing resource blocks are determined from M1 candidate resource blocks, and include a 1st candidate resource block and an M1th candidate resource block in the M1 candidate resource blocks; and a quantity of frequency channel numbers included in each of the M sensing resource blocks is K. The frequency channel numbers used for sensing include: a 1st frequency channel number, a Kth frequency channel number, an ith frequency channel number, and a jth frequency channel number in each of the M sensing resource blocks;
Abstract:
This application discloses an LDPC encoding and decoding method and a related apparatus. This application supports 802.11 series protocols such as Wi-Fi 8, UWB. The method includes: performing low-density parity-check LDPC encoding on an information bit sequence based on a parity check matrix, to obtain a first code word, where the parity check matrix complies with a base matrix, and the base matrix meets one of the following: Each row in the first two columns of the base matrix includes at least one 1, or the first two columns of the base matrix include “1 0” and “0 1” that alternate regularly, and “1 1” is included between “1 0” and “0 1”; and sending the first code word. The parity check matrix complies with the base matrix, which can accelerate an overall decoding convergence speed of a system.
Abstract:
The present invention provides a data transmission method and a communications device. The communications device includes: a transceiver, configured to send a transmission frame to a second communications device, so that the second communications device acquires data information in the transmission frame, where the transmission frame includes a first part and a second part, the transceiver sends the first part of the transmission frame by using a first quantity of subcarriers, the transceiver sends the second part of the transmission frame by using a second quantity of subcarriers, and the first quantity is not equal to the second quantity.
Abstract:
This application relates to a ranging positioning scenario in the field of wireless communication sensing. Example methods, devices, and non-transitory machine-readable storage medium relate to ranging in ultrawideband (UWB) applied in a wireless local area network, which may support the 802.15.4z standard. One example method includes: extracting, by two communication devices (for example, a first device and a second device) key sequences based on wireless channel information (for example, channel state information) between respective narrowband communication modules (for example, Wi-Fi, Bluetooth, or Zigbee). The example method includes providing the key sequences to respective UWB modules, and performing ranging based on the key sequences.