Abstract: A guard band indication method on an unlicensed spectrum is described that includes: a network device generating one or any combination of the following four types of information on the unlicensed spectrum: an indication of bandwidth configuration information, an indication of available bandwidth information, an indication of unavailable bandwidth information, or an indication of guard band information; and the network device sends the one or any combination of the foregoing four types of generated information. The one or any combination of the four types of information is used to determine a guard band that is based on a listen before talk LBT result.

Abstract: This application provides a control resource configuration method, which includes: pre-configuring, by a network device, a plurality of control resource sets on a plurality of sub-bands, where the plurality of control resource sets have different priorities; separately performing, by the network device, channel sensing on the plurality of sub-bands, to determine one or more available sub-bands in the plurality of sub-bands; determining, by the network device, one or more to-be-scheduled control resource sets from the plurality of control resource sets based on a priority of each of the plurality of control resource sets; and sending the one or more to-be-scheduled control resource sets on the one or more available sub-bands and within corresponding channel occupancy time, where the control resource set carries downlink control information for a terminal device. A success rate of sending the CORESET is improved without increasing resources required by the CORESET.

Abstract: Embodiments of this application provide a method for transmitting indication information. The method includes: A first device generates first indication information, where the first indication information includes information about a format of a channel occupancy time of the first device, the channel occupancy time of the first device includes one or more sub-periods, the one or more sub-periods are used for uplink transmission, downlink transmission, flexible transmission, or transmission interruption, and a sub-period for transmission interruption can be used for transmission by another device other than the first device; and the first device sends the first indication information. In an indication manner described in the embodiments of this application, a device may obtain a format in a COT in advance, thereby reducing blind detection overheads, or may sleep in advance, to reducing energy consumption.

Abstract: This application provides a system information transmission method, and a related device and system. The method includes: receiving, by a network device, a system information request sent by one or more terminals; transmitting, by the network device, system information SI, where SI transmitted for one terminal has a quasi-co-location QCL with a portion of downlink signal blocks, and the portion of downlink signal blocks are a subset of all downlink signal blocks transmitted by the network device; and sending, by the network device, first indication information, where the first indication information indicates a mapping between a downlink signal block and SI, and the downlink signal block has a QCL with the SI corresponding to the downlink signal block. The foregoing solution can reduce system overheads and improve resource utilization.

Abstract: Example hybrid automatic repeat request (HARQ) feedback methods and apparatus are described. One example method includes sending first indication information by a base station, where the first indication information is used to indicate a terminal to perform HARQ feedback. Second indication information is sent by the base station, where the second indication information includes second time information used to indicate the terminal to perform the HARQ feedback. The base station receives HARQ feedback information of the terminal. In one example method, the base station may send the first indication information within a first channel occupancy time (COT), and send the second indication information within a second COT.

Abstract: A resource assignment method, a related device, and an apparatus. The method includes: receiving, by a terminal from a network device, a resource assignment indication used to indicate frequency domain resource assignment, where the resource assignment indication is used to indicate a plurality of first resource units assigned to the terminal and that the plurality of first resource units are categorized into one or more groups, where a quantity of first resource units in each group is a product of powers of 2, 3, and 5; and performing, by the terminal, discrete Fourier transform based on the plurality of first resource units. According to the resource assignment method , flexible resource assignment can be performed, and spectrum utilization can be improved.

Abstract: This application provides a random access method, apparatus, and device, and a storage medium. The method includes: A terminal device scrambles first identification information of the terminal device by using an OCC, and sends a first message to a network device. After receiving the first message sent by the terminal device, the network device sends a second message to the terminal device based on the first message, where the second message includes identification information of one or more terminal devices that succeed in random access, so that the terminal device can determine, based on the identification information of the one or more terminal devices the one or more terminal devices include the first identification information of this terminal device, whether this terminal device succeeds or fails in random access.

Abstract: This application provides a channel sensing method, a related device, and a system. The method includes: performing, by a sending device, LBT; and sending, by the sending device, a first channel occupancy signal after the LBT succeeds, where the first channel occupancy signal is used to indicate, to a first receiving device that receives the first channel occupancy signal, a to-be-protected channel occupancy time on a channel occupied by the sending device after the LBT succeeds. According to the foregoing solution, a collision between devices that need to perform transmission can be avoided, thereby improving communication efficiency.

Abstract: This application provides a communications method, which includes: performing, by a network device, LBT on a first carrier, and determining a time offset when the LBT is completed, where the first carrier is used to send a first SS Burst Set, and the time offset is a time offset of an actual transmission time of the first SS Burst Set on the first carrier relative to a configured transmission time of the first SS Burst Set; sending, by the network device, the time offset to a terminal; and receiving, by the terminal, the time offset, and performing rate matching on the first carrier based on the time offset. Thus, the terminal may determine the actual transmission time of the first SS Burst Set based on the time offset, to perform the rate matching and accurately parse downlink data, thereby improving reliability of a communications system.

Abstract: The present disclosure relates to signal transmission methods, devices, and systems. One example method includes sending, by a network device, a plurality of synchronization signal/physical broadcast channel (SS/PBCH) blocks in one or more burst set windows, where the one or more burst set windows include a plurality of candidate positions that are used to transmit the plurality of SS/PBCH blocks. SS/PBCH blocks sent at positions corresponding to at least two particular indexes have a quasi co-located (QCL) relationship.

Abstract: This application provides an indication method, a network device, and user equipment. The network device explicitly or implicitly indicates, by using indication information (including but not limited to a bitmap, information indicating a quantity Wt, and information indicating an index) carried on one or more downlink transmission units, a reception response for one or more downlink transmission unit sets that needs to be received by the network device, that is, a reception response for one or more downlink transmission unit sets that needs to be sent by the UE to the network device, so that the UE can correctly send, on a correct uplink transmission unit, the reception response that is for the downlink transmission unit sets and that the network device indicates the UE to send. In this way, errors and unnecessary retransmission are reduced, quality of service is ensured, and communication efficiency is improved.

Abstract: Embodiments of this application provide a contention window management method applied to an unlicensed band, including: sending, by a sending device, one or more data packets to one or more receiving devices in one reference time unit or a plurality of reference time units, where the one or more data packets occupy a first bandwidth; receiving, by the sending device from the one or more receiving devices, a hybrid automatic repeat request HARQ or HARQs for the one or more data packets; and determining, by the sending device, a contention window CW size of a second bandwidth with reference to the HARQ or HARQs for the one or more data packets. According to the method provided in this application, contention window CW update can be determined based on a HARQ feedback for a data packet, to improve communication efficiency.

Abstract: Embodiments of this application provide a beam management method, a terminal, a network device, and a storage medium. The method includes: when a quantity of reference signals whose RSSIs are greater than a first preset value in reference signals received on a first time-frequency resource on one of one or more beams is less than a second preset value, detecting, by the terminal, a reference signal and/or downlink indication information (used to indicate a sending status of the reference signal on the first time-frequency resource and/or a second time-frequency resource on the beam) from the network device on the second time-frequency resource on the beam. Further, when receiving the downlink indication information on the second time-frequency resource on the beam, the terminal continues to detect a reference signal from the network device on the beam, thereby saving communications system resources.

Abstract: This application discloses a wireless communication method, including: receiving, by a network device, uplink transmission of a first terminal in first duration of channel occupancy duration of the first terminal, where the channel occupancy duration of the first terminal further includes second duration, and the second duration is later than the first duration; and performing, by the network device, downlink transmission in the second duration, where a sum of the first duration and the second duration is less than or equal to the channel occupancy duration of the first terminal. This application further discloses a network device and a terminal that correspond to the wireless communication method. By applying the method and devices, a resource obtained through contention by a terminal applied to an unlicensed frequency band can be properly used, to improve operating efficiency of the unlicensed frequency band.

Abstract: A tracking reference signal (TRS) burst transmission method and apparatus wherein a transmit end determines to send a first TRS burst in the first slot in a maximum channel occupancy time (MCOT), that is, the TRS burst is sent at a start moment of the MCOT, so that a receive end can obtain precise time-frequency synchronization as soon as possible. In addition, when a length of a first MCOT is greater than Y slots, in addition to sending the first TRS burst in the first slot in the MCOT, it is further determined to send a second TRS burst in a slot that is in the first MCOT and whose distance to a start slot of a previous TRS burst is Y slots, to improve effectiveness of the time-frequency synchronization and further improve the reliability of receiving the data at the receive end.

Abstract: This application provides a communication method and a communications device. The method includes: determining configuration information of a plurality of synchronization signal blocks located at different frequency domain positions on one carrier, where the configuration information indicates configuration parameters of the plurality of synchronization signal blocks, the configuration parameter comprises configuration pattern indication information, and the configuration pattern indication information indicates synchronization signal blocks actually sent; and sending the configuration information to a terminal device.

Abstract: This application provides a network device-based communication method, where channel resources are divided according to a specific rule. The method includes: determining, by a network device, at least two channels, where a spacing between center frequencies of two adjacent channels in the at least two channels is a positive integer multiple of a subcarrier spacing or a positive integer multiple of a resource block RB spacing; and communicating, by the network device, by using at least one of the at least two channels. Channel resource division is determined based on the spacing between center frequencies of two adjacent channels, implementing adaptation to an application scenario in which a bandwidth is flexible.

Abstract: A method includes: determining first indication information, where the first indication information indicates a resource location of a second synchronization signal block, and the second synchronization signal block is associated with control information; and sending a first synchronization signal block, where a physical broadcast channel in the first synchronization signal block carries the first indication information.

Abstract: A signal transmission method is provided, which includes: receiving, by a terminal device, resource scheduling information sent by a network device, where the resource scheduling information is used to indicate a second resource set allocated by the network device, the second resource set includes at least one resource block which is from a first resource set, and the first resource set is an integer quantity of resource blocks that are evenly distributed in frequency domain; and performing uplink transmission on a detected idle frequency domain resource based on the resource scheduling information, where the uplink transmission occupies a plurality of time units, a resource structure of a resource block used for the uplink transmission in each time unit is the same as a resource structure of the second resource set, and frequency locations of resource blocks used for the uplink transmission in adjacent time units are different.

Abstract: Embodiments of this application provide a data transmission method, a network device, and a terminal device. The method includes: A network device sends resource indication information to a terminal device, so that the terminal device determines, based on the resource indication information, a resource allocated by the network device. The resource indication information is used to indicate location information of a resource in at least one BWP in a system bandwidth and bandwidth information of the at least one BWP. Further, the network device receives, on a resource corresponding to the resource indication information, uplink data sent by the terminal device. It can be learned that, in the embodiments, the network device may indicate a system bandwidth of any size and/or a resource in any BWP in the system bandwidth to the terminal device, so that the terminal device can perform data transmission on the indicated resource.