Abstract: A data retransmission method is provided herein. The method includes sending a data frame to an electronic device and receiving an acknowledgement frame from the electronic device within a transmission opportunity duration, where the acknowledgement frame includes first acknowledgement information; and when the first acknowledgement information indicates that at least a part of data in the data frame needs to be retransmitted and further indicates a retransmission period required to complete the retransmission, retransmitting information related to the at least the part of the data to the electronic device in the retransmission period.

Abstract: Methods, electronic devices, and chip systems relating to interaction between devices are provided. A method includes: a first electronic device sends a first sound wave signal and a second sound wave signal to a second electronic device by using a first speaker and a second speaker. The first electronic device receives relative position information between the second electronic device and the first electronic device sent by the second electronic device. The relative position information is determined by a receiving result of receiving the first sound wave signal and the second sound wave signal by a first microphone of the second electronic device.

Abstract: This application provides a data transmission method and a terminal device, to reduce a data transmission latency and improve data transmission reliability. The method includes: obtaining, by a terminal device, a grant-free GF resource configured by a base station; obtaining, by the terminal device, current channel quality; and if the current channel quality is first channel quality, transmitting, by the terminal device, to-be-transmitted data by using the GF resource, or transmitting, by the terminal device, the to-be-transmitted data by using a GB resource, where the first channel quality falls within a first range; or if the current channel quality is second channel quality, skipping, by the terminal device, transmitting to-be-transmitted data by using the GF resource, where the second channel quality falls within a second range; where the first channel quality is better than the second channel quality, and the first range is different from the second range.

Abstract: A system information updating method, a user equipment and a base station are provided, the method including: receiving, by the wake-up radio (WUR) interface of the user equipment, a wake-up signal sent by the base station, where the wake-up signal is used to wake up a main radio interface of the user equipment and instruct the main radio interface of the user equipment to receive updated system information, the wake-up signal includes system information (SI) update transmission control information, and the SI update transmission control information includes information required for receiving the updated system information; waking up, by the WUR interface of the user equipment, the main radio interface of the user equipment; and receiving, by the user equipment according to the SI update transmission control information through the woken-up main radio interface, the updated system information sent by the base station.

Abstract: A method includes: sending at least two sound wave signals through a loudspeaker; receiving, through a microphone, at least two sound wave signals from a second electronic device, and determining a first receiving result of receiving the at least two sound wave signals; determining a first possible angle value between the second electronic device and a first electronic device based on the first receiving result; and receiving a second possible angle value between the first electronic device and the second electronic device that is from the second electronic device, and determining an actual angle between the first electronic device and the second electronic device based on the first possible angle value and the second possible angle value; or sending the first possible angle value to the second electronic device, and receiving an actual angle between the first electronic device and the second electronic device.

Abstract: A method to reduce a probability of occurrence of a hidden node in a data transmission process in a high-frequency system is disclosed. The method implemented by a communications apparatus includes determining at least one beam to be used for sending a resource reservation message, where the at least one beam includes a first beam, where a direction of the first beam is opposite to a direction of a second beam, and where the direction of the second beam is a potential transmission direction in which the communications apparatus sends information. The method further includes sending the resource reservation message by using the at least one beam, where the resource reservation message includes a resource reservation request message or a resource reservation response message, where the resource reservation request message is used to request to reserve a transmission resource, and where the resource reservation response message is used to determine to reserve a transmission resource.

Abstract: This application discloses a system information updating method, an apparatus, and a system. The method includes: receiving, by the wake-up radio WUR interface of the user equipment, a wake-up signal sent by a base station, where the wake-up signal is used to wake up a main radio interface of the user equipment and instruct the main radio interface of the user equipment to receive updated system information, the wake-up signal includes system information SI update transmission control information, and the SI update transmission control information includes information required for receiving the updated system information; waking up, by the WUR interface of the user equipment, the main radio interface of the user equipment; and receiving, by the user equipment according to the SI update transmission control information through the woken-up main radio interface, the updated system information sent by the base station.

Abstract: A system information updating method, a user equipment and a base station are provided, the method including: receiving, by the wake-up radio (WUR) interface of the user equipment, a wake-up signal sent by the base station, where the wake-up signal is used to wake up a main radio interface of the user equipment and instruct the main radio interface of the user equipment to receive updated system information, the wake-up signal includes system information (SI) update transmission control information, and the SI update transmission control information includes information required for receiving the updated system information; waking up, by the WUR interface of the user equipment, the main radio interface of the user equipment; and receiving, by the user equipment according to the SI update transmission control information through the woken-up main radio interface, the updated system information sent by the base station.

Abstract: A resource reservation method includes that a network device generates a resource reservation request message (RRQ), where the RRQ includes one first RRQ (RRQ 1) and N second resource RRQs (RRQs 2), the RRQ 1 includes information indicating that a time for which the network device occupies a target channel is first duration, the N RRQs 2 are in a one-to-one correspondence with N user equipments (UEs) and request the N UEs to transmit data to the network device in the first duration, and N>1.

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: A system information updating method, a user equipment and a base station are provided, the method including: receiving, by the wake-up radio (WUR) interface of the user equipment, a wake-up signal sent by the base station, where the wake-up signal is used to wake up a main radio interface of the user equipment and instruct the main radio interface of the user equipment to receive updated system information, the wake-up signal includes system information (SI) update transmission control information, and the SI update transmission control information includes information required for receiving the updated system information; waking up, by the WUR interface of the user equipment, the main radio interface of the user equipment; and receiving, by the user equipment according to the SI update transmission control information through the woken-up main radio interface, the updated system information sent by the base station.

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: An information transmission method apparatus, where the method includes determining, by a network device, first indication information, where the first indication information indicates a configuration of a second resource, the second resource transmits retransmission data including retransmission data of first data, the first data is received from a first terminal device 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.

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: This application provides a data transmission method and a terminal device, to reduce a data transmission latency and improve data transmission reliability. The method includes: obtaining, by a terminal device, a grant-free GF resource configured by a base station; obtaining, by the terminal device, current channel quality; and if the current channel quality is first channel quality, transmitting, by the terminal device, to-be-transmitted data by using the GF resource, or transmitting, by the terminal device, the to-be-transmitted data by using a GB resource, where the first channel quality falls within a first range; or if the current channel quality is second channel quality, skipping, by the terminal device, transmitting to-be-transmitted data by using the GF resource, where the second channel quality falls within a second range; where the first channel quality is better than the second channel quality, and the first range is different from the second range.

Abstract: The method is applied to a communications system including a first network device, a second network device, and a terminal device. The terminal device is communicatively connected to the first network device and the second network device respectively. The method includes: sending, by a network device, a first message to the terminal device, where the first message is used to determine that the terminal device stops communication with the first network device, or the first message is used to determine that the terminal device releases a protocol stack and a data radio bearer that are corresponding to the first network device; and the network device is the first network device or the second network device. Therefore, power consumption of the terminal device or the first network device and waste of air interface resources can be reduced, and flexibility can effectively be improved in a communication process.

Abstract: A method to reduce a probability of occurrence of a hidden node in a data transmission process in a high-frequency system is disclosed. The method implemented by a communications apparatus includes determining at least one beam to be used for sending a resource reservation message, where the at least one beam includes a first beam, where a direction of the first beam is opposite to a direction of a second beam, and where the direction of the second beam is a potential transmission direction in which the communications apparatus sends information. The method further includes sending the resource reservation message by using the at least one beam, where the resource reservation message includes a resource reservation request message or a resource reservation response message, where the resource reservation request message is used to request to reserve a transmission resource, and where the resource reservation response message is used to determine to reserve a transmission resource.

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 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: The method is applied to a communications system including a first network device, a second network device, and a terminal device. The terminal device is communicatively connected to the first network device and the second network device respectively. The method includes: sending, by a network device, a first message to the terminal device, where the first message is used to determine that the terminal device stops communication with the first network device, or the first message is used to determine that the terminal device releases a protocol stack and a data radio bearer that are corresponding to the first network device; and the network device is the first network device or the second network device. Therefore, power consumption of the terminal device or the first network device and waste of air interface resources can be reduced, and flexibility can effectively be improved in a communication process.