According to various embodiments, a reception STA may receive a physical layer protocol data unit (PPDU) including a first field and a second field from a transmission STA. The first field may include information about a configuration of a plurality of resource units (RUs). The second field may include a plurality of user fields for allocating the plurality of RUs to a plurality of users. The reception STA may identify a multiple RU (M-RU) allocated to itself and decode the received PPDU.

Provided are an information transmission method, a terminal device and a network device. The method includes that: a terminal device acquires a first sequence, the first sequence being used for determining a sequence carrying feedback information for downlink data; the terminal device determines target feedback information for target downlink data sent by a network device according to the target downlink data; the terminal device determines a second sequence carrying the target feedback information according to the first sequence; and the terminal device sends the second sequence to the network device. Therefore, the terminal device may efficiently acquire a sequence configured to carry uplink control information.

A method and an apparatus for transmitting and receiving a signal based on a spatial parameter in a wireless communication system are disclosed. A method of performing downlink reception by a user equipment (UE) in a wireless communication system according to an embodiment of the present disclosure may comprise: receiving, from a base station, at least one of downlink control information (DCI) or configuration information including a first spatial parameter for uplink transmission; and receiving, from the base station, a downlink channel based on a second spatial parameter based on the first spatial parameter, and based on that the downlink channel is a physical downlink control channel (PDCCH), the second spatial parameter based on the first spatial parameter may be applied for at least one specific CORESET among at least one CORESET configured for the UE.

Disclosed is a downlink (DL) multi-user (MU) transmission method of an AP device in a wireless local area network (WLAN) system including generating a DL MU physical protocol data unit (PPDU) including a physical preamble and a data field, the data field including at least one MAC protocol data unit (MPDU), the at least one MPDU including a MAC header and a MAC frame body, and the MAC header including ACK indication information for uplink (UL) MU transmission of an ACK frame as a response to data transmitted through the data field, and transmitting the DL MU PPDU.

An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria. The criteria includes a calculation of a smallest eigen value of a frequency channel response matrix and a smallest element of a diagonal of the matrix and a ratio of the largest and smallest eigen values of the matrix.

According to an aspect of the present invention, a method for performing a downlink (DL) multi-user (MU) transmission by an access point (AP) in a wireless communication system may include transmitting a DL MU Physical Protocol Data Unit (PPDU), where the DL MU PPDU includes a trigger frame including trigger information for an uplink (UL) MU transmission and a DL MU frame; and UL MU receiving a UL MU PPDU generated based on the DL MU PPDU, where the UL MU PPDU includes a UL MU frame based on the trigger frame and an acknowledge (ACK) frame in response to the DL MU frame.

This application provides a communication method and apparatus. A terminal receives from a network device, first indication information indicating N sets of information of feedback time, each of the N sets comprises at least one piece of information of feedback time, each of the at least one piece of information of feedback time indicates a quantity of time units comprised in a feedback time of a data block. The terminal receives downlink control information (DCI) from the network device, wherein the DCI comprises second indication information indicating first information of feedback time of the data block, and the first information of feedback time belongs to a first set of information of feedback time, and the first set is one of the N sets. The terminal sends the response message for the data block to the network device based on the second indication information and the first indication information.

A sounding method by a receiving device is provided. The receiving device receives an NDPA frame from a transmitting device, and then receives an NDP frame from the transmitting device. After receiving the NDP frame, the receiving device transmits to the transmitting device a feedback frame including subchannel information measured on a subchannel that is allocated to the first receiving device among a plurality of subchannels into which a predetermined band is divided.

One embodiment is directed to a method comprising deciding to multiplex the data of at least two users within a super-constellation; determining the power split ratio among the at least two users; selecting a super-constellation; and based on the determined power split ratio, choosing a subset of the super-constellation points forming the superposition of modulation constellations of the at least two users.

A method and system are provided for scheduling data transmission in a Multiple-Input Multiple-Output (MIMO) system. The MIMO system may comprise at least one MIMO transmitter and at least one MIMO receiver. Feedback from one or more receivers may be used by a transmitter to improve quality, capacity, and scheduling in MIMO communication systems. The method may include generating or receiving information pertaining to a MIMO channel metric and information pertaining to a Channel Quality Indicator (CQI) in respect of a transmitted signal; and sending a next transmission to a receiver using a MIMO mode selected in accordance with the information pertaining to the MIMO channel metric, and an adaptive coding and modulation selected in accordance with the information pertaining to the CQI.