Abstract: A signal transmission method and an apparatus are provided. The method includes: A sending device generates a sequence of a demodulation reference signal, and maps the sequence of the demodulation reference signal to a time-frequency resource of the demodulation reference signal for sending. The demodulation reference signal is used to estimate a channel state of a first channel, and the first channel carries uplink data. The time-frequency resource includes frequency-domain resources corresponding to a first CDM group, and the frequency-domain resources corresponding to the first CDM group are non-contiguous and equally spaced.

Abstract: An embodiment method includes: determining, by a terminal device, at least one parameter based on first MCS information after receiving the first MCS information, where the at least one parameter is used to indicate a first reference signal pattern, so that the terminal device sends an uplink reference signal based on the first reference signal pattern; and determining, by a network device, the at least one parameter based on the first MCS information, where the at least one parameter is used to indicate the first reference signal pattern, so that the network device receives the uplink reference signal based on the first reference signal pattern.

Abstract: A method includes: receiving first signaling, wherein the first signaling comprises demodulation reference signal (DMRS) patterns configured for N time units, each DMRS pattern is used to indicate a quantity of DMRSs in each time unit, the quantity of DMRSs in each time unit is a total quantity of time domain symbols occupied by all DMRSs in the time unit, DMRSs configured for at least two of the N time units occupy different total quantities of time domain symbols, and N is a positive integer greater than 1; and receiving or sending data in the N time units based on the total quantity of time domain symbols occupied by all the DMRSs in each time unit.

Abstract: The present disclosure discloses example data transmission methods and apparatuses. One example method includes determining first downlink control information (DCI) by a network device. The first DCI is sent to n terminal devices by the network device, where the first DCI includes information for the n terminal devices to perform data transmission, and n is an integer greater than or equal to 2.

Abstract: Embodiments of this application provide an information sending method, an information receiving method, and a related device. In the information sending method, a network device sends first signaling that carries first indication information, and the network device further sends second signaling that carries second indication information. The first indication information indicates a subset identifier corresponding to a first precoding subset in a first codebook. The first codebook includes a plurality of precoding subsets. Each precoding subset includes a plurality of precoding matrices, and different precoding subsets correspond to different subset identifiers. The second indication information indicates a matrix identifier corresponding to a first precoding matrix in the first precoding subset. Precoding matrices in the first precoding subset correspond to different matrix identifiers, and the first precoding matrix is used to precode a physical uplink shared channel (PUSCH) carried on a first subband.

Abstract: This application provides a method for transmitting control information and an apparatus. The method includes: When a time domain resource for transmitting first control information on a first PUCCH conflicts in a first time unit with a time domain resource for transmitting a first transport block on a first PUSCH, a terminal device determines, based on a relationship between a payload size of the first control information and a first threshold, a first time domain resource for transmitting the first control information. The first threshold is a maximum quantity of bits of the first control information that can be sent by the terminal device in the first time unit without generating a first result. The first result is that some information bits in the first transport block cannot be transmitted. The terminal device transmits the first control information on the first time domain resource.

Abstract: Embodiments of this application provide a data transmission method and a communication apparatus. The method includes: A network device sends first information to a terminal device, where the first information is used to indicate transport block size TBS configuration information and/or redundancy version RV configuration information, the TBS configuration information is used to configure a first transport block size TBS, and the RV configuration information is used to configure first RV information. The network device receives a transport block from the terminal device, or the network device sends a transport block to the terminal device, where a TBS of the transport block is the first TBS, and/or RV information of the transport block is the first RV information. The network device may expand a TBS and/or refine an RV by using the TBS configuration information and/or the RV configuration information, thereby improving a spectral efficiency when the TB is transmitted.

Abstract: A transmission method includes receiving first information from a first network device, receiving second information from the first network device, and transmitting the first data to the first network device based on the first information and the second information. The first information is useable by the terminal device to divide first data into at least two data blocks. The first data is to-be-transmitted data between the first network device and the terminal device. A quantity of slots occupied by the first data is greater than 1. Each data block of the at least two data blocks is mapped to a different corresponding time-domain position. The second information is useable to indicate at least two modulation and coding schemes (MCSs) useable for transmitting the at least two data blocks, and the at least two MCSs are different from one another.

Abstract: Embodiments of this application provide for a transmission method and a related communication apparatus. In the method, a communication device determines a maximum quantity of repetitions allowed when data is transmitted by using a transport block over multiple slots (TBoMS), N1, and performs a repeated transmission of the data based on N1. In the method, N1, N2, and N meet a preset condition, N1?1, N1 is an integer, N2 indicates a quantity of slots occupied by one transport block (TB) when data is transmitted by using the TBoMS, N2?2, N2 is an integer, N is a preset value, and N is a positive integer.

Abstract: In a demodulation reference signal (DMRS) configuration method, a network device sends first scheduling information to a terminal device. The terminal device determines, based on the first scheduling information, whether a transmission of a first time unit meets a condition of having the same transmit power, same precoding, same antenna port, or a same frequency domain resource as the transmission of a second time unit. The second time unit is before the first time unit and has a transmission direction that is the same as a transmission direction in the in the first time unit, and no transmission in an opposite direction exists between the second time unit and the first time unit. When the first time unit meets the above condition, the terminal device sends uplink data in the first time unit and the second time unit, or receiving downlink data in the first time unit and the second time unit.

Abstract: Example transmit power determining methods and apparatus are described. One example method includes determining a first transmit power based on N time domain resources corresponding to a first transport block. The first transport block is sent on the N time domain resources at the first transmit power. The first transmit power is a transmit power of the first transport block on each of the N time domain resources, a size of the N time domain resources is greater than one slot, and N is a positive integer.

Abstract: This application discloses a communication method and apparatus, to resolve an existing problem that a large quantity of time-frequency resources are occupied for indicating a quantity of repeated transmissions of a Msg 3. The method includes: A terminal device receives first information. The terminal device obtains first indication information based on a shared bit in the first information. The first indication information indicates a quantity of repeated transmissions of a third message Msg 3. The third message Msg 3 is a radio resource control RRC connection request in a random access procedure. The shared bit is shared by the first indication information and the first information. The terminal device determines the quantity of repeated transmissions of the third message based on the first indication information.

Abstract: Embodiments of this application provide an information sending method, an information receiving method, and a related device. In the information sending method, a network device sends first signaling that carries first indication information, and the network device further sends second signaling that carries second indication information. The first indication information indicates a subset identifier corresponding to a first precoding subset in a first codebook. The first codebook includes a plurality of precoding subsets. Each precoding subset includes a plurality of precoding matrices, and different precoding subsets correspond to different subset identifiers. The second indication information indicates a matrix identifier corresponding to a first precoding matrix in the first precoding subset. Precoding matrices in the first precoding subset correspond to different matrix identifiers, and the first precoding matrix is used to precode a physical uplink shared channel (PUSCH) carried on a first subband.

Abstract: A communication method and apparatus where the method includes: a network device that receives a random access request from a terminal device; and the network device sends a random access response to the terminal device, where the random access response includes scheduling information of a message 3 that includes first information that a request that the terminal device repeatedly transmit the message 3 by using same transmit power and a same precoding matrix. In response to repeatedly transmitting the message 3, the terminal device with the same transmit power and the same precoding matrix, so that stability of transmission of the message 3 is improved, and a transmission success rate of the message 3 is improved, thereby improving an access success rate of a random access procedure of the terminal device.

Abstract: This application provides a communication method and apparatus. The method includes: A terminal device receives an MCS index value from a network device, and determines, in an MCS index table, a modulation method and a target bit rate that correspond to the MCS index value, where a maximum target bit rate corresponding to a ?/2 BPSK modulation method in the MCS index table is greater than a first threshold, so that the terminal device can achieve higher spectral efficiency when performing uplink transmission by using the ?/2 BPSK modulation method, thereby improving uplink performance.

Abstract: A signal transmission method and an apparatus are provided. The method includes: A sending device generates a sequence of a demodulation reference signal, and maps the sequence of the demodulation reference signal to a time-frequency resource of the demodulation reference signal for sending. The demodulation reference signal is used to estimate a channel state of a first channel, and the first channel carries uplink data. The time-frequency resource includes frequency-domain resources corresponding to a first CDM group, and the frequency-domain resources corresponding to the first CDM group are non-contiguous and equally spaced.

Abstract: An uplink transmission method includes sending, by a terminal device to a network device, an uplink signal that includes a zero power reference signal. In a time-frequency resource for sending the uplink signal, a transmit power of the uplink signal within a range of a time-frequency resource of the zero power reference signal is zero.

Abstract: A communication method includes determining a third time unit and a fourth time unit. The third time unit includes all or a part of time units that are in at least one first time unit and that are used for transmission in a first transmission direction. A first signal is transmitted in the at least one first time unit in the first transmission direction based on a quantity of repeated transmissions. The fourth time unit is located after the at least one first time unit in a time domain, and the third time unit and the fourth time unit meet a requirement of transmitting the first signal based on the quantity of repeated transmissions. The method also includes repeatedly transmitting the first signal in the third time unit and the fourth time unit.

Abstract: This application provides a data transmission method. The method may include: determining that a position of a start bit of a first bit sequence and a position of an end bit of a second bit sequence are contiguous in a coded bit sequence, where the first bit sequence is a bit sequence in first transmission, the second bit sequence is a bit sequence in second transmission, the first transmission and the second transmission carry a same transport block, and the second transmission is previous transmission of the first transmission; and receiving and/or sending the first bit sequence.

Abstract: An information receiving method and apparatus, and an information sending method and apparatus are disclosed. The information receiving method includes: A terminal device receives first configuration information from a network device, where the first configuration information carries precoding indication information of each resource unit of N resource units allocated to the terminal device; and the terminal device performs precoding processing on uplink data carried on each resource unit by a precoding matrix corresponding to the precoding indication information of each resource unit, based on the first configuration information. In this method, the terminal device determines, based on the precoding indication information, a quantity N and sizes of the resource units obtained through division.