Abstract: An uplink dynamic grant-free transmission method and an apparatus, and relates to the field of communications technologies. The method includes: a terminal receives downlink control information sent by a base station, where the downlink control information includes a plurality of pieces of indication information, each piece of indication information corresponds to one type 2 configured grant configuration, the indication information is used to indicate the terminal to perform an operation on the type 2 configured grant configuration corresponding to the indication information, and the operation includes: activating, deactivating, or maintaining a state; and then the terminal performs corresponding operations on the plurality of type 2 configured grant configurations based on the downlink control information.

Abstract: A first communication apparatus receives resource configuration information from a second communication apparatus, where the resource configuration information includes a first resource that is configured by the second communication apparatus for the first communication apparatus for data transmission. The first communication apparatus releases, based on a preset condition, a second resource to which a first synchronization signal block SSB is mapped, where the second resource is a dedicated resource of the first communication apparatus, and the first resource includes the second resource.

Abstract: A communication method and apparatus, the method including sending, by a terminal device, a random access request to a network device, where the random access request includes a random access preamble, control information, and user data, the terminal device is in an inactive state, and the control information includes at least a connection identifier and an authentication identifier, receiving, by the terminal device, a random access response sent by the network device, and performing, by the terminal device, a state transition AND/OR operation corresponding to a message format of the random access response.

Abstract: This application relates to the field of wireless communication technologies. A terminal device receives configuration information, which indicates that one first combination is mapped to a plurality of downlink reference signals, and one first combination is mapped to a plurality of second combinations. The terminal device then determines a mapping relationship between a first combination and downlink reference signals, a mapping relationship between a first combination and second combinations, and a mapping relationship between second combinations and downlink reference signals based on the configuration information. Next, a first preamble is sent on a first RO included in a first combination, and a first uplink reference signal is sent on a first PO included in a second combination. The selected first combination has a mapping relationship with the selected second combination. A selected downlink reference signal group is indicated by the selected first combination.

Abstract: This application provides a data transmission method and an apparatus, to reduce a quantity of times of repeated transmission of data, reduce power consumption of a terminal device, save transmission resources, and maintain a high time diversity gain. The method includes: A network device sends first information, and a terminal device receives the first information, where the first information is used to configure K repeated transmission occasions. The network device and the terminal device repeatedly transmit first data on N repeated transmission occasions in the K repeated transmission occasions, where the N repeated transmission occasions are discontinuous in time domain, K is an integer greater than 1, and N is an integer greater than or equal to 1 and less than K.

Abstract: Embodiments of this application provide a data transmission method, a network device, and a terminal device. The method may include detecting, by a network device, a first signal in an uplink signal. The method may also include determining, by the network device, a signal structure of the uplink signal based on a result of detecting the first signal. Furthermore, the method may include receiving, by the network device, the uplink signal based on the signal structure, and/or responding to the uplink signal based on the signal structure. According to the data transmission method in the embodiments of this application, before receiving data, the network device can determine the signal structure, used by the terminal device, of the uplink signal, and then use a corresponding receiving method to avoid complexity and a reliability risk that are caused by completely blind detection performed by the network device.

Abstract: An uplink transmission methods and apparatuses to reduce a probability that a collision between a user equipment (UE) and another UE occurs when the UE sends uplink data, thereby improving network performance are described. A plurality of different preamble signals are sent to a network device by a user equipment (UE). A feedback signal of the network device in response to the plurality of preamble signals is received by the UE. The feedback signal in response to each preamble signal carries a timing advance (TA) corresponding to the preamble signal. A valid TA is determined by the UE from the plurality of received TAs. A parameter used for uplink transmission is determined by the UE based on a feedback signal carrying the valid TA or a preamble signal corresponding to the valid TA. Uplink data are sent according to the parameter by the UE.

Abstract: A sequence sending method and an apparatus, to reduce a probability of a sequence conflict. The method includes: a terminal device sends, in a first time period, a first sequence to a network device, where the first sequence is determined based on a first parameter; the terminal device performs scrambling processing on a second sequence based on the first parameter, to generate a scrambled second sequence; the terminal device sends, in a second time period, the scrambled second sequence to the network device; the terminal device performs scrambling processing on an Nth sequence based on an (N?1)th parameter, to generate a scrambled Nth sequence, where an (N?1)th sequence is determined based on the (N?1)th parameter, and N is an integer greater than 2; and the terminal device sends, in an Nth time period, the scrambled Nth sequence to the network device.

Abstract: A data transmission method, a terminal, and a network device are provided. In embodiments of the present disclosure, a terminal sends, in a grant-free mode, first data to a network device by using a grant-free resource, and if the terminal needs to switch from the grant-free mode to a grant mode, the terminal sends, in the grant mode, second data to the network device by using a grant resource. When the terminal initially transmits the first data in the grant-free mode, if the terminal needs to switch from the grant-free mode to the grant mode, the terminal may fall back to the grant mode and transmit data in the grant mode.

Abstract: A communication method includes receiving, by a first terminal device, first information sent by a second terminal device. The first information includes information indicating a second beam selected by the second terminal device. The communication method also includes sending, by the first terminal device, (1) identification information of the second terminal device, or (2) identification information and the first information, to a network device. The first terminal device is a cluster head node, and the second terminal device is a member node of a cluster to which the first terminal device belongs.

Abstract: This application relates to the field of wireless communication technologies, and discloses a communication method and an apparatus, to reduce power consumption caused by invalid listening of a terminal. First, a first device sends a first message to a second device, and the second device may send the first message from the first device to a third device. Then, the first device listens to a response message of the first message from the third device in a listening time window. The response message of the first message may be sent by the third device to the first device, or may be sent by the third device to the first device via the second device.

Abstract: A data transmission method and a related device. In the method, a first terminal device receives response information based on received DCI that is associated with SSB information and/or a first identity and that is from a network device. In this way, the first terminal device may learn in advance, based on the received DCI, whether to receive response information scheduled by using the DCI. In other words, the first terminal device may identify, based on the DCI, whether a PDSCH scheduled by using the DCI is response information of the first terminal device, thereby avoiding repeated receiving of unnecessary response information, and reducing power consumption of the first terminal device.

Abstract: Embodiments of this application provide a data transmission method, a network device, and a terminal device. The method may include detecting, by a network device, a first signal in an uplink signal. The method may also include determining, by the network device, a signal structure of the uplink signal based on a result of detecting the first signal. Furthermore, the method may include receiving, by the network device, the uplink signal based on the signal structure, and/or responding to the uplink signal based on the signal structure. According to the data transmission method in the embodiments of this application, before receiving data, the network device can determine the signal structure, used by the terminal device, of the uplink signal, and then use a corresponding receiving method to avoid complexity and a reliability risk that are caused by completely blind detection performed by the network device.

Abstract: A communication method and an apparatus. A terminal device camps on a first BWP, where the terminal device is in a non-connected state. The terminal device receives a first message from a network device, where the first message is for indicating a second BWP; and the terminal device switches from the first BWP to the second BWP.

Abstract: Embodiments of this application provide a synchronization signal block transmission method and a communication apparatus. In an example method, a first synchronization signal block SSB from a network device is received, where the first SSB is a first-type SSB for a first terminal device. If the first SSB is a second-type SSB for a second terminal device, a first control-resource set and/or first common search space is determined based on the first SSB. In the example method, different results may be obtained when the second terminal device and the first terminal device identify a type of the first SSB, and the second terminal device and the first terminal device may use the first SSB in different manners.

Abstract: An information transmission method includes sending, by a terminal, second information and uplink data. The uplink data is sent in a second access mode. The second information indicates a first access mode. The first access mode is useable by the terminal to send the uplink data before the terminal sends the uplink data in the second access mode.

Abstract: Embodiments of this application provide a communication method and apparatus. The method includes: receiving indication information that is of a target reference signal and that is sent by a cluster head terminal; and measuring the target reference signal based on the indication information, to obtain a coverage level of a cluster member terminal in a target cell. In comparison with a conventional technology, in embodiments of this application, the cluster head terminal indicates, by sending the indication information of the target reference signal to the cluster member terminal, the cluster member terminal to measure the target reference signal, so that the cluster head terminal learns of the coverage level of the cluster member terminal in the target cell, and further, a network device can perform different RRC configuration based on different coverage levels of the cluster member terminal.

Abstract: An uplink data transmission method and an apparatus include or relate to a terminal device which determines, based on indication information of a network device, a time-frequency resource corresponding to a random access resource, or a part of a time frequency resource in the random access resource, to directly transmit uplink data. Configuration information of a time-frequency resource for random access may be reused for configuration information of the time-frequency resource, so that signaling overheads are reduced and a resource utilization is improved.

Abstract: A communication method and apparatus, the method including sending, by a terminal device, a random access request to a network device, where the random access request includes a random access preamble, control information, and user data, the terminal device is in an inactive state, and the control information includes at least a connection identifier and an authentication identifier, receiving, by the terminal device, a random access response sent by the network device, and performing, by the terminal device, a state transition AND/OR operation corresponding to a message format of the random access response.

Abstract: The disclosure provides an uplink transmission method, a terminal, and a network side device. The method includes: pre-allocating, by a network side device, an uplink transmission time-frequency resource to a terminal, and storing, by the terminal, the uplink transmission resource; and when the terminal needs to send a data packet, sending, by the terminal, the data packet to the network side device by using the uplink transmission resource, where the data packet includes indication information, the indication information is used to indicate whether the data packet is initially transmitted by the terminal or the data packet is retransmitted by the terminal, and the network side device can correctly receive the data packet and perform combination processing on the data packet based on the indication information. According to embodiments of the disclosure, reliability of grant-free transmission can be ensured, and communication performance can be effectively improved.