Abstract: This application discloses a communication method and an apparatus, and relates to the communication field, so that a network device and a terminal device determine a mapping relationship between spatial correlation parameters and transport blocks when the transport blocks are repeatedly sent. The communication method includes: receiving first indication information, where the first indication information is used to indicate K spatial correlation parameters for receiving a transport block carried on N resources, K and N are integers greater than 1, and K?N; determining a mapping relationship between the K spatial correlation parameters and the N resources; and receiving the transport block on the N resources based on the mapping relationship.

Abstract: This application provides a link failure recovery method and apparatus. A terminal may send first request information to a network device on a same resource (namely, a first resource) when detecting that a link of any one of a plurality of cells fails or links of any more than one of the plurality of cells fail, to notify the network device that a link of at least one of the L cells fails. In this way, in a multi-carrier scenario, compared with resource overheads in a solution in which when a link of each cell fails, one resource is occupied to send one piece of request information, resource overheads are reduced in embodiments of this application.

Abstract: Embodiments of this application provide an information indication method and apparatus, to implement indication of transmission configuration indication information and data transmission in a multi-beam transmission scenario. In the method and the apparatus, a network device sends configuration information to a terminal device, to configure M transmission configuration indicator TCI states; the network device sends first indication information to the terminal device, where the first indication information is used to indicate A TCI states in the M TCI states; the network device sends second indication information to the terminal device, to indicate a first codepoint, where the first codepoint is determined by the network device based on at least one TCI state and according to a preset mapping rule between a TCI state and a codepoint; and the network device communicates with the terminal device based on the at least one TCI state.

Abstract: This application provides a channel state information transmission method and apparatus. The method includes: receiving N reference signal groups, where N is an integer greater than or equal to 2; and sending channel state information, where the channel state information includes a first resource index, a second resource index, and first channel quality information, the first resource index is a resource index of a first reference signal, the second resource index is a resource index of a second reference signal, the first reference signal and the second reference signal are reference signals in different groups in the N reference signal groups.

Abstract: This application provides a communications method and apparatus, to improve uplink transmission performance. The method includes determining, by a terminal device, capability indication information and sending the capability indication information to a network device. The capability indication information is used to determine a power scaling factor, the power scaling factor is a ratio of a sum of actual transmit power of n non-zero antenna ports to channel transmit power, and a maximum value of the channel transmit power is a rated maximum transmit power of a system.

Abstract: A precoding matrix indication method and a related device. In the method, a transmit end can group K combination coefficients based on an amplitude value of each of the K combination coefficients, to obtain Q combination coefficient groups, and determine a phase value of each combination coefficient in each combination coefficient group. The amplitude value of each combination coefficient is determined by using a same amplitude quantization bit quantity and a same amplitude quantization rule. In addition, phase quantization bit quantities and/or phase quantization rules used by at least two of the Q combination coefficient groups are different.

Abstract: The present disclosure relates to signal processing methods and apparatus. One example method includes determining a first sequence {x(n)} based on a preset condition and a sequence {s(n)}, generating a reference signal of a first signal by using the first sequence, and sending the reference signal on a first frequency-domain resource. The preset condition is xn=y(n+M)mod K, where y n = A · e j × ? × s n 8 , a length of the first sequence is K=6, n=0, 1, . . . , K?1, A is a non-zero complex number, and j=?{square root over (?1)}. The first signal is a signal modulated by using ?/2 binary phase shift keying (BPSK). The first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, k=u+L*n+delta, L is an integer greater than or equal to 2, delta?{0, 1, . . . , L?1}, u is an integer, and subcarrier numbers of the K subcarriers are numbered in ascending or descending order of frequencies.

Abstract: This application provides an information transmission method and a communications apparatus. The method includes: determining a correspondence between a first aggregation level (AL) set associated with a plurality of first physical downlink control channel (PDCCH) candidates and a second AL set associated with a plurality of second PDCCH candidates; and monitoring at least one of the plurality of first PDCCH candidates and/or at least one of the plurality of second PDCCH candidates based on the correspondence.

Abstract: The present disclosure relates to resource indication methods and apparatus. In one example method, a network device configures resource configuration information for a terminal device. The terminal device determines channel state information based on the resource configuration information, and sends the channel state information. The resource configuration information is used to indicate a first reference signal resource set, L second reference signal resource sets, and a type of the first reference signal resource set. The first reference signal resource set includes resources for M first reference signals, and a resource for one of the M first reference signals is used to measure a channel.

Abstract: Embodiments of the present invention disclose a communication method and a device. Configuration information indicating one or more spatial domain beam basis vector groups and Q thresholds is received from a network device, where the Q thresholds correspond one-to-one to spatial domain beam basis vectors in the one or more spatial domain beam basis vector groups. L spatial domain beam basis vectors are selected from a spatial domain beam basis vector group set. K frequency domain basis vectors are selected from a frequency domain basis vector set for each of the L spatial domain beam basis vectors.

Abstract: A reference signal transmission method is disclosed, the method including: determining at least two first reference signal resources; receiving a first channel based on the at least two first reference signal resources when a scheduling offset is less than or equal to a preset threshold and/or there is no spatial relation parameter information indication field in downlink control information DCI; and demodulating the first channel. When data on at least two reference signal resources needs to be received within a period of time, the method can increase a probability that a terminal device successfully receives the data.

Abstract: This application provides a sequence-based signal processing method and apparatus. An example signal processing method includes: determining a sequence {xn} including N elements, where N is equal to 18 and the sequence {xn} satisfies a preset condition; generating a first signal based on the sequence {xn}; and sending the first signal.

Abstract: This application provides a data transmission method, terminal device, and network device. The method includes: sending, by a terminal device, at least one precoded reference signal on at least one reference signal resource corresponding to a first PRG, where different precoding matrixes are used for different reference signals, and the first PRG is a PRG used to transmit a reference signal; receiving, by the terminal device, resource indication information, where the resource indication information indicates a reference signal resource that is corresponding to a second PRG and that is in the at least one reference signal resource, and the second PRG is a PRG used to transmit a physical uplink shared channel (PUSCH); and sending, by the terminal device, a precoded PUSCH on the second PRG based on the resource indication information, where a precoding matrix used for the PUSCH is a precoding matrix used for a reference signal sent on the reference signal resource corresponding to the second PRG.

Abstract: The present disclosure relates to channel quality information reporting methods, apparatus, and systems. One example method includes obtaining, by a user equipment (UE), a reporting method of reporting channel quality information by the UE, and reporting, by the UE, the channel quality information to a base station in the reporting method. The reporting method comprises at least one of a reporting granularity, a reporting range, and a reporting mode.

Abstract: A method for operating an access node includes sending a configuration of one or more first channel state information reference signal (CSI-RS) resources and a configuration of one or more sounding reference signal (SRS) resources, generating first control information including an identifier of a SRS resource set that includes the one or more SRS resources precoded by one or more precoders, generating second control information including an identifier of the one or more first CSI-RS resources, wherein the one or more first CSI-RS resources are associated with the identified SRS resource set, wherein the one or more first CSI-RS resources convey a downlink reference signal (RS) used for making measurements, and wherein the one or more precoders are determined in accordance with measurements of the downlink RS, sending the first control information and the second control information, and sending the downlink RS.

Abstract: Methods, base station, and receiving device are provided to advance a decoding time of a second codeword. The method performed by a base station includes obtaining a demodulation pilot pattern (DPP) in a transmission time unit, the DPP includes a first DPP of a first codeword and a second DPP of a second codeword; the first DPP indicates a time-frequency resource of each OFDM symbol in a first set, and the second DPP indicates a time-frequency resource of each OFDM symbol in a second set; and an MCS indication value of the first codeword is greater than an MCS indication value of the second codeword; and mapping a pilot signal to a time-frequency resource based on the DPP, and sending the pilot signal, a transmission time of a first OFDM symbol in the first set is before a transmission time of a first OFDM symbol in the second set.

Abstract: This application discloses a sequence generating method and apparatus, and relates to the field of communications technologies, to resolve a problem that a PAPR of a DMRS symbol is higher than that of a data symbol. An initialization factor of a first sequence is obtained, where the initialization factor is associated with a first parameter; and the first sequence is generated based on the initialization factor. In addition, the first parameter is a port number, or the first parameter is a code division multiplexing CDM group identity.

Abstract: Embodiments of this application provide a channel state information transmission method, a terminal device, and a network device. The method includes: sending, by a terminal device, a first reference signal through a first antenna port set, where the first antenna port set includes n antenna ports; receiving, by the terminal device, a second reference signal through a second antenna port set, where the second antenna port set includes N antenna ports, and the first antenna port set is a proper subset of the second.

Abstract: The present disclosure relates to information transmission methods and apparatus. In one example method, a terminal obtains first spatial parameter information of a first channel. The terminal receives the first channel based on the first spatial parameter information. The first channel is one of multiple candidate control channels in a first control resource set. The first control resource set is configured by using a master information block (MIB), a system information block type 1 (SIB 1), or a physical downlink control channel (PDCCH) common configuration parameter.

Abstract: An information transmission method includes: A terminal receives first signaling, where the first signaling includes a first field, a state value of the first field is used to indicate a first spatial relation parameter for receiving a first channel, the state value of the first field is a candidate state value corresponding to the first field, and at least one of the candidate state values corresponds to two or more spatial relation parameters. The terminal obtains one or more target spatial relation parameters in the first spatial relation parameter, and receives the first channel based on the one or more target spatial relation parameters. In this method, the terminal receives the first channel by receiving the first signaling sent by a base station and obtaining a target spatial relation parameter.