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: A communication method includes: After determining a quantity of coded modulation symbols of first UCI, a terminal device may send the first UCI to a network device through a first channel that occupies a plurality of time units. The quantity of coded modulation symbols of the first UCI is determined based on a quantity N of time units occupied by the first channel and/or a scaling factor K of a transport block carried on the first channel.

Abstract: This application provides an uplink transmission method and an apparatus. The method includes: A network device indicates a terminal device to send a first transport block in a plurality of time units, and further indicates the terminal device to send uplink control information UCI in a first time unit. The first time unit is one of the plurality of time units. Regardless of whether the terminal device detects that the network device indicates the terminal device to send the UCI, both the network device and the terminal device calculate, based on a parameter G corresponding to the first time unit, a location of a starting bit in a coded bit sequence that is output through rate matching in a second time unit. The parameter G is a total quantity of coded bits available for transmission of the first transport block and the UCI in one time unit.

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 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: This application provides a DMRS sending method, a DMRS receiving method, and a communication apparatus. The method includes: receiving indication information indicating a scheduled DMRS port; and sending a DMRS on the scheduled DMRS port. The scheduled DMRS port belongs to a DMRS port set, the DMRS port set includes M DMRS ports, the M DMRS ports correspond to a first time domain position and a second time domain position, and a first DMRS port set corresponding to the first time domain position is different from a second DMRS port set corresponding to the second time domain position. In this way, different DMRS port sets are mapped to the first time domain position and the second time domain position, so that more orthogonal DMRS ports can be supported, thereby improving a system capacity.

Abstract: The present disclosure relates to communication methods and apparatuses. In one example method, a receiving device receives a first demodulation reference signal (DMRS) from a first DMRS port by using a first time-frequency resource, and receives a second DMRS from a second DMRS port by using a second time-frequency resource. The first time-frequency resource is a part of time-frequency resources in the second time-frequency resource, and an orthogonal cover code (OCC) of the first DMRS is orthogonal to an OCC corresponding to the first time-frequency resource in an OCC of the second DMRS.

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: Embodiments of this application provide a signal receiving method, a signal sending method, and a corresponding apparatus. The method includes: A terminal device receives indication information from a network device, where the indication information indicates at least one SRS resource, and the at least one SRS resource corresponds to a receive antenna to be used by the terminal device to receive a downlink signal. The terminal device receives the downlink signal from the network device by using the receive antenna corresponding to the at least one SRS resource.