Abstract: A sounding reference signal sending method, a sounding reference signal receiving method, an apparatus, and a system relating to the field of communications technologies to improve SRS resource utilization and reduce resource waste are disclosed. The method includes: receiving, by a terminal device, SRS configuration information sent by a network side device, where the SRS configuration information includes first-type indication information used to instruct the terminal device to trigger, based on uplink data, sending of an SRS; and once there is the uplink data needing to be transmitted, sending the SRS on an SRS resource.

Abstract: A method includes determining, based on a cyclic prefix (CP) length corresponding to a random access preamble and a time length corresponding to a cyclic shift interval, a CP length corresponding to a data channel, and sending the data channel. The method may be applied to a random access procedure.

Abstract: A random access method and an apparatus. In the method, random access is completed in a manner in which an agent terminal performs access, so that an access requirement of a terminal can be satisfied under low energy consumption. The method and the apparatus may be applied to application scenarios such as an internet of things (IoT), machine type communication (MTC), massive machine type communication (mMTC), an internet of vehicles, and a connected vehicle.

Abstract: This application provides an uplink transmission resource determining method and an apparatus. The method includes: receiving first system information sent by a network device, where the first system information includes a first PUSCH resource configuration; determining whether a preset condition is met; receiving second system information sent by the network device when the preset condition is not met, where the second system information includes a second PUSCH resource configuration; and determining, based on the second PUSCH resource configuration, a parameter used for uplink transmission. In this way, a terminal may flexibly select the PUSCH resource configuration in the first system information or the PUSCH resource configuration in the second system information based on a requirement of the terminal. The second system information is received only when the preset condition is not met, to reduce information obtained by the terminal and reduce power consumption of the terminal.

Abstract: A reference signal indication method and an apparatus are disclosed to indicate a to-be-reported reference signal in a random access process. The to-be-reported reference signal is a reference signal with a largest receive power. In the solutions disclosed in this application, the reference signal with the largest receive power may be reported. In this way, a network device can determine an optimal transmit beam, and can further determine an optimal receive beam, so that the optimal transmit beam and/or the optimal receive beam can be used to communicate with a terminal, to improve a beam gain of data transmission in the random access process.

Abstract: This application relates to the field of communications technologies, and discloses a DMRS port determining method and a communications apparatus, to resolve a problem that collisions occur on DMRS ports used by a large quantity of terminal devices to send uplink data and a random access effect is affected during 2-step random access. The method includes: receiving, by a terminal device, configuration information sent by a network device, where the configuration information includes DMRS configuration information and indication information of a DMRS port set, the DMRS configuration information is used to configure a plurality of DMRS ports, and the indication information of the DMRS port set is used to indicate one or more available DMRS ports in the plurality of DMRS ports; and determining, by the terminal device, a target DMRS port in the DMRS port set.

Abstract: This application provides an uplink transmission time domain resource determining method and an apparatus. The uplink transmission time domain resource determining method in this application includes: receiving first information sent by a network device, where the first information is used to configure a time domain resource of a physical uplink shared channel PUSCH occasion, and the first information includes guard period configuration information and time domain resource configuration information of the PUSCH occasion; and determining time domain resources of a plurality of first PUSCH occasions based on the first information, where all time domain symbols of each first PUSCH occasion are in a same slot, and a time domain interval between at least two adjacent first PUSCH occasions in the plurality of first PUSCH occasions is greater than or equal to a guard period configured based on the guard period configuration information.

Abstract: In a method for determining a resource of an asynchronous physical uplink shared channel PUSCH, user equipment (UE) receives time domain resource configuration information and frequency domain resource configuration information from a network device. The UE sets, based on the time domain resource configuration information, a time domain position of a first hop of a first PUSCH and a time domain position of a second hop of the first PUSCH to be inconsecutive in the time domain. The UE then determines a frequency domain position of the first hop of the first PUSCH and a frequency domain position of the second hop of the first PUSCH based on the frequency domain resource configuration information.

Abstract: In the field of communication technologies, a random access preamble sending method and a communication apparatus are provided to avoid a problem that a conflict exists between a PRACH time-frequency resource occupied by a terminal device for sending a random access preamble and a PUSCH time-frequency resource occupied by another terminal device for sending uplink data, and consequently a network device cannot normally receive the random access preamble and the uplink data. The method includes: a terminal device receives configuration information sent by a network device, where the configuration information includes configuration information of a PRACH time-frequency resource set and configuration information of a PUSCH time-frequency resource set. The terminal device determines, in the PRACH time-frequency resource set, a PRACH time-frequency resource that does not conflict with the PUSCH time-frequency resource set.

Abstract: A method includes: When user equipment is in an RRC idle mode or inactive mode, the user equipment sends a first random access preamble to an access network device on a PRACH resource, and sends first uplink data to the access network device on a PUSCH resource. The user equipment sends, by using at least two beams respectively, SRSs to the access network device on at least two SRS resources associated with the PUSCH resource. The user equipment receives a random access response from the access network device, where the random access response includes beam indication information, and the beam indication information is used to indicate an optimal beam in the at least two beams.

Abstract: The application provides a data sending method and a communication apparatus to avoid signaling overheads caused by scheduling by a network device, and a terminal device can flexibly select a quantity of repeated transmissions based on an actual situation, so that data transmission performance is improved. The network device sends configuration information of a receive power to the terminal device. After receiving the configuration information of the receive power, the terminal device determines a quantity of repeated transmissions of target data based on the configuration information of the receive power. After determining the quantity of repeated transmissions of the target data, the terminal device sends the target data to the network device based on the quantity of repeated transmissions of the target data.

Abstract: An uplink control information transmission method and apparatus. The method includes: determining, by a terminal device, a preamble that needs to be sent; determining, by the terminal device based on the preamble, a first resource set that is in a physical uplink shared channel resource and that is used to send uplink control information, where the PUSCH resource includes a plurality of resource sets; and sending, by the terminal device, the uplink control information and uplink data on the PUSCH resource, where the uplink control information is mapped to the first resource set, the uplink data is mapped to a resource that is other than the plurality of resource sets and that is in the PUSCH resource, and no information or uplink data is mapped to a resource set that is other than the first resource set and that is in the plurality of resource sets.

Abstract: A random access method, a device, and a system are provided, relate to the field of communications technologies.

Abstract: Embodiments of this application provide an information transmission method and a device. The method includes receiving at least one precoding configuration from an access network device, starting a timer, and then sending uplink information to the access network device on a configured grant-free time-frequency resource in valid duration of the timer by using the at least one precoding configuration.

Abstract: An uplink transmission methods and apparatuses to reduce a probability that a collision between a user equipment (UE) and another UE occurs when the UE sends uplink data, thereby improving network performance are described. A plurality of different preamble signals are sent to a network device by a user equipment (UE). A feedback signal of the network device in response to the plurality of preamble signals is received by the UE. The feedback signal in response to each preamble signal carries a timing advance (TA) corresponding to the preamble signal. A valid TA is determined by the UE from the plurality of received TAs. A parameter used for uplink transmission is determined by the UE based on a feedback signal carrying the valid TA or a preamble signal corresponding to the valid TA. Uplink data are sent according to the parameter by the UE.

Abstract: This application provides an asynchronous uplink transmission method, a device, and a storage medium. The method includes: receiving, by UE, configuration information that is of a first PUSCH and that is sent by a network device, where the configuration information includes a length of a cyclic prefix CP of the first PUSCH, and the length of the CP of the first PUSCH is less than a length of a CP of a first random access preamble; determining, by the UE based on the length of the CP of the first PUSCH, a difference between a largest stored timing advance TA and a smallest stored TA, and a largest delay spread, whether to send the first PUSCH; and if determining to send the first PUSCH, sending, by the UE, the first PUSCH based on the configuration information of the first PUSCH.

Abstract: A method includes determining, based on a cyclic prefix (CP) length corresponding to a random access preamble and a time length corresponding to a cyclic shift interval, a CP length corresponding to a data channel, and sending the data channel. The method may be applied to a random access procedure.

Abstract: Embodiments of this application disclose a power control method, a related apparatus, and a product, so that a receive end can normally receive a signal. The method in the embodiments of this application includes: determining, by UE, an initial transmit power of a first-type PUSCH; determining, by the UE, that an actual transmit power of the first-type PUSCH in a time period in which a second-type PUSCH is not transmitted and that is in a transmission time unit of the first-type PUSCH is a first power; and determining, by the UE, that an actual transmit power of the first-type PUSCH in a time period that is used to transmit the second-type PUSCH and that is in the transmission time unit of the first-type PUSCH is a second power.

Abstract: A sounding reference signal sending method, a sounding reference signal receiving method, an apparatus, and a system relating to the field of communications technologies, to improve SRS resource utilization and reduce resource waste are disclosed. The method includes: receiving, by a terminal device, SRS configuration information sent by a network side device, where the SRS configuration information includes first-type indication information used to instruct the terminal device to trigger, based on uplink data, sending of an SRS; and once there is the uplink data needing to be transmitted, sending the SRS on an SRS resource.