Abstract: This application provides channel state information reporting methods and communications apparatuses. One method includes: generating first indication information and a plurality of groups of second indication information, where the first indication information indicates a plurality of frequency domain component vectors, each group in the plurality of groups of second indication information corresponds to a spatial layer and a plurality of spatial domain component vectors and constructs precoding vectors of the spatial layer in a plurality of frequency bands, and each piece of second indication information in each group corresponds to a spatial domain component vector in the plurality of spatial domain component vectors and indicates at least one of the plurality of frequency domain component vectors that corresponds to the spatial domain component vector; and sending the first indication information and the second indication information.

Abstract: The present disclosure relates to communication methods and apparatus. In one example method, a terminal device receives first indication information, where the first indication information is used to indicate grouping information of N control resource sets in M control resource sets, N is less than M, and N and M are positive integers greater than or equal to 1. The terminal device determines grouping information of K control resource sets other than the N control resource sets in the M control resource sets based on the first indication information.

Abstract: A communication method includes sending configuration information of a reference signal. The communication method also includes receiving the reference signal via M antenna ports based on the configuration information, wherein M is an integer greater than 0, the M antenna ports includes at least one first antenna port, a comb occupied by the first antenna port is based on a first offset, and the first offset is based on one or more of a time domain resource occupied by the first antenna port or a frequency domain resource occupied by the first antenna port.

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: This application discloses a sounding reference signal transmission method and a communication apparatus. In the method, a network device sends configuration information of one or more sounding reference signal (SRS) ports to a terminal device, where the configuration information indicates a sending occasion corresponding to the SRS port, each SRS port is in one-to-one correspondence with a receive antenna of the terminal device, and SRS transmit bandwidths corresponding to at least two of sending occasions corresponding to each SRS port are different; and the terminal device sends an SRS based on the SRS resource configuration information.

Abstract: A sending device sends, by using a first resource and a second resource, a reference signal corresponding to a first port. The first resource and the second resource are respectively on a first OFDM symbol and a second OFDM symbol that are not adjacent to each other. The first port belongs to a first port set or a second port set, a reference signal corresponding to a port in the first port set corresponds to a first cover code on the first resource and the second resource, a reference signal corresponding to a port in the second port set corresponds to a second cover code on the first resource and the second resource, and the first cover code is different from the second cover code.

Abstract: An access network device sends first indication information to a terminal device, and sends second indication information to the terminal device. When the second indication information indicates a first value, the first indication information indicates a first port index group in a plurality of port index groups included in a first set. When the second indication information indicates a second value, the first indication information indicates a second port index group in a plurality of port index groups included in a second set. The first port index group and the second port index group have an association relationship.

Abstract: A communication method and apparatus are provided, to improve communication reliability. The method includes: When a first index of a first signal is the same as a first index corresponding to first indication information, a terminal device may communicate the first signal based on a first spatial parameter indicated by the first indication information. The first spatial parameter may be for communicating at least two types of signals/channels. For example, the first indication information may be a unified TCI. Therefore, according to the method, in a scenario in which a spatial parameter for a signal/channel is indicated by the unified TCI, a spatial parameter used for a to-be-sent signal/channel can be accurately determined, and the communication reliability can be improved.

Abstract: A communication method and a communication apparatus. The method includes: A terminal device sends an uplink reference signal to an access network device based on a sending pattern, where an uplink reference signal resource of the uplink reference signal includes N ports, the N ports in the sending pattern are carried on two or more OFDM symbols, or the N ports in the sending pattern are carried on two or more frequency domain combs and one OFDM symbol, and N is an integer greater than 4; and the terminal device receives precoding indication information indicating precoding for transmitting uplink data, the precoding indication information is obtained by the access network device based on the uplink reference signal, and rows of a matrix corresponding to the precoding are in one-to-one correspondence with the N ports.

Abstract: This application provides a communication method and an apparatus, so that a terminal device and a network device can determine, based on a frequency domain position of each resource element in a second resource element set, a transmit sequence of each uplink transmit port on the second resource element set, to send and receive an uplink reference signal on a non-uniform pilot resource.

Abstract: The present disclosure relates to resource determining methods and apparatus. One example method includes receiving, by a terminal, N pieces of channel measurement reference signal configuration information, where each of the N pieces of channel measurement reference signal configuration information is used to indicate a time domain resource occupied by a channel measurement reference signal on one carrier, serving cell, or bandwidth part, and N is a positive integer, and determining, by the terminal based on the N pieces of channel measurement reference signal configuration information, an orthogonal frequency division multiplexing (OFDM) symbol occupied by a demodulation reference signal (DMRS) in a first time unit.

Abstract: This application provides example antenna panel status indication methods and apparatuses. One example method includes sending first antenna panel status information, where the first antenna panel status information indicates a status of at least one antenna panel. Response information of the first antenna panel status information can then be received. It can then be determined, based on the response information, that the status of the at least one antenna panel takes effect.

Abstract: This application provides a communication method and apparatus, so that a terminal device sends uplink pilot signals, the terminal device obtains a first delay information set based on downlink pilot signals from a network device, and the network device jointly considers the first delay information set and the uplink pilot signals to perform uplink channel estimation. The first delay information set may indicate a delay position of a strong path, and uplink channel estimation accuracy can be improved.

Abstract: This application provides a communication method and a communication apparatus. The first configuration information includes configuration information of n CSI-RSs, and n is an integer greater than 1. The terminal device receives the n CSI-RSs based on the first configuration information. The terminal device determines a CQI based on m CSI-RSs and a mapping relationship, where the CQI indicates channel quality of a PDSCH, the mapping relationship is a mapping relationship between a data stream of the PDSCH and CSI-RS ports corresponding to the m CSI-RSs, the m CSI-RSs are included in the n CSI-RSs, m is an integer greater than 1, and m is less than or equal to n.

Abstract: A network device sends K reference signal resources, where K is an integer greater than 0. The network device receives a first random access preamble in a first random access time-frequency resource unit. The network device determines indexes of S reference signal resources and first channel state information CSI of the S reference signal resources based on the first random access preamble and the first random access time-frequency resource unit the S reference signal resources are reference signal resources in the K reference signal resources, and S is an integer greater than 0 and less than or equal to K.

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 link failure recovery method and apparatus. When a link failure occurs and link recovery is performed, if a terminal device determines that no new link is identified, according to the method, the terminal device may report, to a network device, an identifier of a cell in which the link failure occurs and information indicating whether a new link is identified for each cell. The network device may reconfigure a new resource set based on the information, and notify the terminal device of the new resource set by using downlink control information DCI. In other words, a reference signal in another resource set is triggered by using the DCI, and the reference signal in the resource set is reported for link recovery.

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: Example data transmission methods and apparatus are described. One example method includes determining an actual transmit power for first uplink data by a terminal device based on a determined channel transmit power and a transmission parameter. The actual transmit power is less than or equal to the channel transmit power, and the transmission parameter includes one or more of parameters that can be used to indicate a location of the terminal device. The terminal device sends the first uplink data at the actual transmit power. Therefore, the terminal device may determine the actual transmit power for the uplink data based on the channel transmit power and various transmission parameters that can indicate whether the terminal device is located at a cell edge, so that the actual transmit power for the uplink data can be flexibly adjusted.

Abstract: A design method of a multi-zone grouped and light-homogenized Fresnel lens for a concentrating system includes: step 1, designing, according to a basic principle of a Fresnel lens, a planar Fresnel lens; step 2, establishing, according to an optical path characteristic of the concentrating system, an optical path equation of the concentrating system; step 3, determining a differential form of uniform distribution of luminous energy density; and step 4, based on the step 3, calculating design parameters of the multi-zone grouped and light-homogenized Fresnel lens to obtain the multi-zone grouped and light homogenized Fresnel lens.