Abstract: Embodiments of this application provide a data transmission method and apparatus. The method includes: receiving indication information indicating a data distribution manner selected from a first data distribution manner and a second data distribution manner; performing data transmission with the network device according to the data distribution manner indicated by the indication information; wherein the data distribution manner indicating a distribution of modulation symbols of a code block (CB) on one or more orthogonal frequency division multiplexing (OFDM) symbols of at least one resource unit, the one or more OFDM symbols are consecutive in time-domain; and wherein modulation symbols distributed on a same OFDM symbol of the one or more OFDM symbols are interleaved in frequency-domain according to the first data distribution manner and are not interleaved in the frequency-domain according to the second data distribution manner.

Abstract: This application relates to the field of communications technologies, and provides a reference signal configuration method, a base station, and a terminal, so as to configure a time-frequency resource on which a reference signal of a terminal is located, so that a reference signal corresponding to a terminal that uses a first waveform maintains a relatively low PAPR.

Abstract: This application provides a Demodulation Reference Signal (DMRS) transmission method and a communications device. The method includes: determining, by a communications device, a current mode of a resource scheduling unit, where the current mode is a frequency hopping mode or an aggregation mode, and performing, by the communications device, DMRS mapping or demapping by using a DMRS pattern corresponding to the current mode, where a location of a symbol occupied by a DMRS in the DMRS pattern corresponding to the current mode is different from a location of a symbol occupied by a DMRS in a preset DMRS pattern. In embodiments of this application, a location of a symbol occupied by a DMRS can be flexibly selected depending on different modes. Therefore, requirements of the different modes can be satisfied in the embodiments of this application, thereby improving network performance.

Abstract: Embodiments of the present invention disclose a reference signal sending/receiving method, a terminal device, and a network device. The terminal device determines transmit power of a reference signal of the terminal device, where the transmit power is related to a quantity of unavailable time-frequency resources in a transmission unit in which the reference signal is located; and transmits the reference signal based on the transmit power. After receiving the reference signal from the terminal device, the network device parses the reference signal based on the transmit power. The terminal device relates the transmit power of the reference signal of the terminal device to the quantity of unavailable time-frequency resources in the transmission unit in which the reference signal is located, thereby improving the transmit power of the reference signal of the terminal device in uplink MU-MIMO, and improving communication performance of the terminal device with a low signal-to-noise ratio.

Abstract: Embodiments of this application provide a data transmission method and apparatus. The method includes: receiving indication information indicating a data distribution manner selected from a first data distribution manner and a second data distribution manner; performing data transmission with the network device according to the data distribution manner indicated by the indication information; wherein the data distribution manner indicating a distribution of modulation symbols of a code block (CB) on one or more orthogonal frequency division multiplexing (OFDM) symbols of at least one resource unit, the one or more OFDM symbols are consecutive in time-domain; and wherein modulation symbols distributed on a same OFDM symbol of the one or more OFDM symbols are interleaved in frequency-domain according to the first data distribution manner and are not interleaved in the frequency-domain according to the second data distribution manner.

Abstract: This application provides a method for configuring a channel state information reporting band, a reporting method, and a corresponding apparatus. The method includes: determining a channel state information subband size based on a bandwidth part BWP; and determining, a quantity of channel state information subbands included in a channel state information reporting band, based on a carrier bandwidth CC bandwidth or the bandwidth part BWP bandwidth or a channel state information reference signal CSI-RS bandwidth, and the channel state information subband size. The method further includes: determining an actual quantity of resource blocks included in a starting subband and an actual quantity of resource blocks included in an ending subband in the channel state information subband. Implementation of this application makes configuration of a quantity and size of subbands in a CSI reporting band more flexible, and reduces complexity of terminal addressing.

Abstract: This application discloses a data sending method, a data receiving method, a device, a system, and a storage medium, and pertains to the field of communications technologies. The method includes: precoding at least two first preprocessed spatial flows to obtain a plurality of precoded data flows, where the at least two first preprocessed spatial flows are obtained by preprocessing a first original spatial flow; and transmitting the plurality of precoded data flows. This application helps to resolve a problem that a plurality of UEs cannot perform spatial multiplexing on a time-frequency resource and a system throughput is affected, helps the plurality of UEs to perform spatial multiplexing on the time-frequency resource, and improves the system throughput. This application is used for data transmission.

Abstract: This application provides a technical solution for rank indication, and especially when a CQI number is not configured or a CQI number is 1, a network device configures a rank indication restriction parameter as that at least one of ranks whose index numbers are 0, 1, 2, and 3 is allowed to be reported by the terminal device; or even if the network device does not perform the foregoing configuration, and none of the ranks whose index numbers are 0, 1, 2, and 3 is allowed to be reported, the terminal device may select at least one rank for RI reporting, so as to resolve a problem that a system cannot work. In addition, according to embodiments of this application, bit overheads required for RI reporting may further be reduced.

Abstract: A radio access node (RAN) and method of operation of the RAN are provided. The RAN includes a massive multiple-input-multiple-output (MIMO) antenna array. The RAN includes a processing hardware configured to carry out a communication method that includes receiving a digital data stream for transmission on a time-frequency resource. The RAN precodes the digital data stream using a digital beamforming stage to render a precoded digital downlink data stream for downlink data stream signal transmission to a user equipment. The digital beamforming stage includes a first precoding stage configured according to a long-term matrix, and a second precoding stage configured according to a short-term matrix. The RAN is further configured to generate a downlink data stream transmission signal to the user equipment in accordance with the precoded digital downlink data stream.

Abstract: An embodiment of this application provides a synchronization signal transmitting method. The method includes: configuring, by a base station, one or more groups of synchronization signals, where each group of synchronization signals is mapped to N PRBs and occupies multiple symbols in time domain, and N is a positive integer greater than or equal to 1; and transmitting, by the base station, the one or more groups of synchronization signals. In comparison with the prior art, PSD of a synchronization signal can be increased, and coverage of the synchronization signal can be ensured.

Abstract: The present disclosure relates to a method for sending cell common control reference information. In one example method, before common control information needs to be sent, a base station having M antenna ports generates the cell control reference information used to detect the common control information. The base station maps the common control information and the cell control reference information to one or more resource units (RUs) of N antenna ports. The N antenna ports are a subset of the M antenna ports. The base station uses the one or more RUs to send the common control information and the cell control reference information used to detect the common control information to a user equipment (UE) within a coverage area of the base station.

Abstract: This application relates to the field of communications technologies, and discloses a transport block generation method and apparatus. The method includes: determining a TBS based on an MCS of a receiving device, a resource characteristic of an RB allocated to the receiving device, and a quantity of symbols, where the quantity of symbols is a quantity of symbols included in each RB, and each RB includes a same quantity of symbols; and generating a TB based on a TBS. TBS is determined based on the MCS of the receiving device, a quantity of RBs allocated to the receiving device, and the quantity of symbols included in the RB, and the TB is generated based on the determined TBS. The quantity of symbols included in the RB is considered in determining the TBS. Therefore, the determined TBS may vary with the quantity of symbols included in the RB.