Abstract: An indication information sending method includes that a base station generates first indication information, and send the first indication information to a terminal device; and where the first indication information is used to indicate a power control manner of a first channel, the power control manner of the first channel is one power control manner in a power control manner set, and the power control manner set comprises a transmit power of a signal on the first channel is determined by a terminal device based on a first parameter; or a transmit power of a signal on the first channel is determined by a terminal device according to a rule predefined on the terminal device.

Abstract: A message transmission method and a device are used to accelerate a random access procedure. The method includes: receiving, by a terminal device, a repetition quantity of an uplink message from a network device, in response to determining that a reference signal receive power (RSRP) range of the terminal device is within an RSRP range corresponding to a signal coverage enhancement level 0, wherein the uplink message comprises a third message of a sequence of messages comprised in a random access attempt; calculating, by the terminal device, transmit power based on a power control parameter for the repetition quantity; and sending, by the terminal device, the uplink message to the network device based on the calculated transmit power.

Abstract: This application provides a reference signal sequence transmission method. The method includes: generating a reference signal sequence based on a frame number of a radio frame; mapping at least a part of reference signals in the reference signal sequence to a resource position that corresponds to the radio frame and that is used to transmit the at least a part of reference signals; and sending the at least a part of reference signals or an orthogonal reference signal at the resource position, where the orthogonal reference signal is obtained by multiplying the at least a part of reference signals by a preset orthogonal code.

Abstract: A method for scheduling resources is disclosed herein. A terminal device receives a downlink control information (DCI) indication sent by a network device. The DCI is used to indicate a first resource, and the first resource is a time-frequency resource for a narrowband physical uplink shared channel (NPUSCH) format 2 transmission. The NPUSCH format 2 is used to bear downlink hybrid automatic repeat request-acknowledgment (HARQ-ACK) feedback information. The terminal device determines the first resource according to the DCI, and sends a scheduling request to the network device on the first resource.

Abstract: A message transmission method and a device are used to accelerate a random access procedure. The method includes: receiving, by a terminal device, a repetition quantity of an uplink message from a network device, in response to determining that a reference signal receive power (RSRP) range of the terminal device is within an RSRP range corresponding to a signal coverage enhancement level 0, wherein the uplink message comprises a third message of a sequence of messages comprised in a random access attempt; calculating, by the terminal device, transmit power based on a power control parameter for the repetition quantity; and sending, by the terminal device, the uplink message to the network device based on the calculated transmit power.

Abstract: A gap determining method includes: A terminal device receives first configuration information and second configuration information from a network device. The terminal device receives scheduling information from the network device. The terminal device determines a downlink gap of the first channel based on the first configuration information. The terminal device determines a first gap between the N transport blocks based on the second configuration information. When the terminal device determines that a preset condition is satisfied, the terminal device determines that a gap part that is included in the first gap and that overlaps with the downlink gap is postponed in time domain and that a gap part obtained through postponing does not overlap with the downlink gap; or when the first gap includes a gap part that overlaps with the downlink gap, the terminal device determines that the gap part belongs to the downlink gap.

Abstract: The present disclosure relates to methods and apparatus for determining an initial bandwidth part. One example method includes determining a frequency resource of a first initial BWP, where the frequency resource of the first initial BWP is included in a frequency resource of a second initial BWP, the frequency resource of the first initial BWP corresponds to a first-type terminal device, the frequency resource of the second initial BWP corresponds to a second-type terminal device, and the terminal devices of two types have different capabilities.

Abstract: This application relates to a communication method and apparatus. A terminal device sends first uplink data to a network device. After sending the first uplink data, the terminal device monitors a first downlink control channel in a first search space in a first duration; and after the first duration ends, the terminal device monitors a second downlink control channel in a second search space in a second duration. A length of a periodicity of the second search space is greater than a length of a periodicity of the first search space. In this case, the terminal device monitors the second downlink control channel based on the second search space at a low frequency. Therefore, the second search space with a long periodicity is set, so that power consumption of monitoring the downlink control channel by the terminal device can be reduced.

Abstract: This application relates to the field of communications technologies, and provides a data transmission method and a communications apparatus, to reduce complexity and overheads of data reception performed by a base station. The method includes: receiving information about a repetition quantity R1 corresponding to Tmax, where Tmax is a maximum transport block size allowed to be used to transmit data; determining a cyclic parameter L based on R1, where the cyclic parameter L indicates that content carried in each of a plurality of time units to which a transport block used to transmit the data is mapped is repeated in L consecutive time units, and wherein a size of the transport block used to transmit the data is Ts, and Ts<Tmax; and transmitting the data based on the cyclic parameter L.

Abstract: Example communication methods and apparatus are described. One example method includes determining a random access preamble by a terminal device. The random access preamble includes six symbol groups. The terminal device determines a frequency location of the random access preamble based on random access configuration information and a preset rule. A frequency hopping interval between a first symbol group and a second symbol group and a frequency hopping interval between a fifth symbol group and a sixth symbol group are equal and are first intervals. A frequency hopping interval between the second symbol group and a third symbol group and a frequency hopping interval between a fourth symbol group and the fifth symbol group are equal and are second intervals. A frequency hopping interval between the third symbol group and the fourth symbol group is a third interval. The random access preamble is sent based on the frequency location.

Abstract: A method for determining a carrier center frequency in a wireless communications system and apparatus is provided. The method includes: determining, a carrier center frequency used by a base station and UE to communicate, according to a frequency band starting frequency, an absolute radio frequency channel number, a frequency band offset, and a relative radio frequency channel number. According to this application, a time for searching for a cell by a terminal can be reduced, power consumption of the terminal can be reduced, and a battery life can be extended.

Abstract: Embodiments of the present invention disclose a signal sending method and apparatus and a signal receiving method and apparatus. The signal sending method includes: generating, by a network device, a first signal, where the first signal includes at least one sequence pair, each of the at least one sequence pair includes two sequences, and an element value of one sequence of the two sequences is a value obtained by calculating, according to a first calculation rule, an element value of the other sequence of the two sequences and an element value of a first sequence corresponding to the other sequence, where each sequence in the at least one sequence pair and the first sequence are complex sequences with lengths greater than 1; and sending, by the network device, the first signal to a terminal device.

Abstract: Example signal transmission methods and apparatus are described. One example method includes generating a first signal by a network device, where the first signal is used to indicate to a terminal device whether there is paging scheduling information on a first paging occasion. The network device determines a first resource based on at least one of a paging configuration parameter, a first parameter set, a terminal device identifier, or a terminal identification code. The network device sends the first signal to the terminal device on the first resource. The signal transmission methods, network device, and terminal device in the embodiments of this application enable the terminal device to determine, based on the first signal, whether to listen on a downlink control channel, reducing power consumption of the terminal device.

Abstract: A data transmission method and an apparatus are provided. The method includes: A terminal device receives DCI from a network device, where the DCI is used to schedule downlink data and indicate a modulation scheme of the downlink data, the modulation scheme of the downlink data is a first modulation scheme or QPSK, and a modulation order corresponding to the first modulation scheme is greater than 2; and the terminal device receives the downlink data based on the modulation scheme. Based on the foregoing procedure, the network device indicates the modulation scheme of the downlink data by using the DCI, so that the terminal device receives the downlink data based on the modulation scheme indicated by the DCI. In this way, scheduling based on higher order modulation indicated by using the DCI is implemented.

Abstract: This application provides a method and an apparatus that are for transmitting data in a random access process. The method includes sending a message 1 to a network device. The method further includes receiving a message 2 sent by the network device, where the message 2 includes uplink grant information, where the uplink grant information includes first indication information, and where the first indication information is used to indicate a largest transport block size TBS allowed for a message 3. The method includes determining a target TBS in candidate TBSs based on the allowed largest TBS, where the target TBS is less than or equal to the allowed largest TBS. The method further includes sending the message 3 to the network device, where the message 3 includes uplink data transmitted based on the target TBS.

Abstract: A method for determining a carrier center frequency in a wireless communications system and apparatus are provided. The method includes: determining, a carrier center frequency used by a base station and UE to communicate, according to a frequency band starting frequency, and absolute radio frequency channel number, a frequency band offset, and a relative radio frequency channel number. According to this application, a time for searching for a cell by a terminal can be reduced, power consumption of the terminal can be reduced, and a battery life can be extended.

Abstract: A data transmission method and a communications apparatus are described that reduce complexity and overhead of data reception performed by a base station. The method includes receiving information about a repetition quantity R1 corresponding to Tmax, where Tmax is a maximum transport block size allowed to be used to transmit data. The method further includes determining a cyclic parameter L based on R1, where the cyclic parameter L indicates that content carried in each of a plurality of time units to which a transport block used to transmit the data is mapped is repeated in L consecutive time units, and wherein a size of the transport block actually used to transmit the data is Ts, and Ts is less than a maximum transport block size (Tmax). The method further includes transmitting the data based on the cyclic parameter L.

Abstract: A communication method and apparatus are provided. The method includes: A terminal device receives first indication information sent by a network device. The terminal device determines a target transmission mode of N TBs based on the first indication information, where the target transmission mode is a sequential transmission mode or an interleaved transmission mode. The terminal device receives the N TBs from the network device based on the target transmission mode. According to the method and the apparatus in this application, the terminal device can receive, based on different transmission modes, DCI and a plurality of TBs that are scheduled by using the DCI.

Abstract: Embodiments of this application provide a communication method, device, and system. When a resource is reserved, a conflict between a reference signal of a terminal device and data transmission of another terminal device can be avoided, and impact on channel estimation performance of the terminal device can be avoided. In an embodiment, a network device determines resource configuration information, and sends the resource configuration information to the terminal device. The terminal device receives the resource configuration information, and determines, based on the resource configuration information, a symbol that corresponds to a first resource and that is in a first time unit. The symbol corresponding to the first resource does not include a symbol on which a reference signal is located and that is in the first time unit, and the first resource is not used for data transmission corresponding to the terminal device.

Abstract: A signal sending method, a signal receiving method, and an apparatus are provided. The method includes: generating, by a terminal device, a first symbol group that carries a first preamble, where the first symbol group includes four groups of symbols; and sending, by the terminal device, the first symbol group to a network device in K groups of uplink subframes, where any two groups of uplink subframes in the K groups of uplink subframes are not adjacent, each group of uplink subframes in the K groups of uplink subframes include at least one uplink subframe, and uplink subframes included in the group of uplink subframes are continuous subframes, where K is a positive integer greater than 1 and less than or equal to 4.