Abstract: This application provides a communication method, apparatus, and device, and a storage medium. The method includes: A first device receives first downlink information from a second device, where the first downlink information includes scheduling information indicating uplink transmission of the first device, a transmission parameter and/or a transmission resource of the scheduling information are/is related to second downlink information, and the second downlink information is downlink information before the first downlink information, or the second downlink information is a synchronization signal in the first downlink information. The first device sends uplink information to the first device. This implements flexible scheduling for uplink transmission, and further improves uplink resource utilization efficiency.

Abstract: A method and an apparatus for receiving control information of downlink data and a method and an apparatus for sending control information of downlink data are provided, to flexibly and accurately send and receive control information of downlink data, so as to improve transmission efficiency of the downlink data. A first device receives a synchronization signal from a second device, where at least one parameter of control information of downlink data is related to the synchronization signal. Then, the first device may receive the control information of the downlink data from the second device based on the at least one parameter of the control information of the downlink data. Further, the first device receives the downlink data from the second device based on the control information of the downlink data.

Abstract: This application provides a channel coding method and apparatus, including: A terminal device generates a first bit sequence, and determines a second bit sequence based on the first bit sequence, where the second bit sequence includes M bits, any bit in the last N bits in the second bit sequence has a same value as a bit that is in the first N bits in the first bit sequence and that is in one-to-one correspondence with the bit, M and N are positive integers, and M is greater than N; performs convolutional coding on the second bit sequence based on a convolutional encoder, to obtain a third bit sequence, where an initial value of a shift register of the convolutional encoder is equal to values of the last N bits in the second bit sequence, and the convolutional encoder includes N shift registers; and sends the third bit sequence.

Abstract: A method includes receiving, by a first device, first signaling from a second device, wherein the first signaling is useable to indicate that the second device successfully received first identity information from the first device and is useable to indicate to the first device to send second identity information to the second device, the first signaling comprises a first inventory identifier, and the first inventory identifier is useable to indicate an identifier of an ongoing inventory process of the second device. The method further includes determining, by the first device based on the first signaling, that the first inventory identifier is the same as a second inventory identifier, wherein the second inventory identifier is useable to indicate an identifier of an ongoing inventory process of the first device. The method further includes sending, by the first device, the second identity information to the second device.

Abstract: A synchronization method includes generating, by a first device, a synchronization by way of orthogonal frequency division multiplexing (OFDM). The synchronization signal includes one or more of a first signal or a second signal. The first signal is used to determine a time domain start position occupied by data sent by the first device to a second device. The second signal is used to determine a frequency at which the second device sends data to the first device. The synchronization method also includes sending, by the first device, the synchronization signal to the second device.

Abstract: This application provides a paging method and an apparatus. In the paging method, a first core network device sends first signaling to a first device, indicating to the first device to page a terminal device. The first device may send second signaling, where the second signaling may indicate information about a first flag. The information about the first flag indicates that a type of a flag of a to-be-paged terminal device is a first type and/or a state of the flag is a first state, to determine the to-be-paged terminal device. In this way, a mechanism for paging the terminal device is provided, and there is no need to determine which terminal device is to be paged. This helps simplify the process of paging the terminal device.

Abstract: This application provides a communication method and a communication apparatus. In the method, M amplitude shift keying modulation symbols included in a first signal sent by a signal sending device are the same as M amplitude shift keying modulation symbols included in a second signal. In addition, bandwidth occupied by a first frequency domain signal of the first signal in frequency domain is half of that occupied by a second frequency domain signal of the second signal in frequency domain. In addition, the first signal is one OFDM symbol in time domain, and duration of the M amplitude shift keying modulation symbols carried by the first signal is the same as that of the M amplitude shift keying modulation symbols carried by the second signal.

Abstract: A communication method and apparatus are provided. The method includes: A network device sends first signaling, indicating a terminal device to initiate random access on a first random access occasion; after receiving the first signaling, if the terminal device cannot complete the random access or data transmission after the random access, for example, stored energy of the terminal device is insufficient, the terminal device may send first indication information to the network device, indicating that a first terminal device cannot complete the random access or data transmission after the random access; and after receiving the first indication information, the network device may send second signaling, indicating the terminal device to initiate random access on a next random access occasion (namely, a second random access occasion) after the first random access occasion.

Abstract: A power control method and apparatus, and a computer-readable storage medium. The method includes: A second device determines first indication information, and the second device can send the first indication information to a first device. Correspondingly, the first device may receive the first indication information from the second device, the first device may determine a first transmit power based on the first indication information, and the first device may send a signal at the first transmit power. The first transmit power is less than or equal to a maximum transmit power of the first device. The second device may control a transmit power of the first device by sending the first indication information to the first device, so that the transmit power of the first device is less than or equal to the maximum transmit power.

Abstract: The technology of this application relates to a paging method and an apparatus. A first device sends first signaling used to page a terminal device. The first signaling includes memory information or an identifier of the terminal device, to indicate the to-be-paged terminal device. In addition, the terminal device may further determine a first resource based on the first signaling, to send uplink data by using the first resource. The first device may also receive, on the first resource, the uplink data from the terminal device. The terminal device may determine the first resource based on the first signaling is equivalent to the first device allocating a resource to the terminal device. In this way, steps needing to be performed for data transmission between the terminal device and the first device are reduced.

Abstract: A signal sending method, a signal receiving method, and a communication apparatus. A first device sends a first signal to a second device on a first frequency domain unit, and sends a second signal on a second frequency domain unit. The first frequency domain unit includes a first frequency, and the second frequency unit includes a second frequency. An absolute value of a difference between the first frequency and the second frequency is related to one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is a bandwidth occupied by the first frequency domain unit in frequency domain. The second bandwidth is a bandwidth occupied by the second frequency domain unit in frequency domain. The third bandwidth is a bandwidth occupied by a third frequency domain unit in frequency domain.

Abstract: This disclosure provides a communication method and a communication apparatus. In some aspects, a network device receives first indication information from a core network device, where the first indication information indicates the network device to trigger, after receiving uplink data from a first terminal device, a second terminal device to access the network device. After the network device receives first uplink data from the first terminal device, the network device triggers the second terminal device to access the network device. According to the method, complexity of data transmission and processing procedures of an inventory taking procedure transplanted to a cellular network can be reduced, so that an inventory taking rate of terminal devices and a communication capacity of a system are effectively improved.

Abstract: This disclosure provides a communication method, apparatus, and a storage medium. The method includes: a first device determines a first frequency unit, and communicates with a second device on the first frequency unit. A granularity of a first channel raster corresponding to the first frequency unit is less than a granularity of a second channel raster corresponding to a second frequency unit. The second frequency unit is used for communication between the first device and a third device. The first frequency unit and the second frequency unit are located in a same operating band.

Abstract: The present disclosure discloses example communications methods and apparatuses. One example method includes obtaining effective carrier indication information from a network device. An effective carrier frequency is obtained based on the effective carrier indication information, where the effective carrier indication information includes first information, second information, and third information. The first information includes first indication information, second indication information, or third indication information. The first indication information is used to indicate that carriers are not paired, the second indication information is used to indicate that carriers are paired, the third indication information is used to indicate a paired carrier frequency spacing, the second information is used to indicate a start carrier frequency, and the third information is used to indicate a frequency domain location of an effective carrier relative to a start carrier.

Abstract: This application provides a communication method, an apparatus, a device, and a storage medium. The method includes: A first device generates a first orthogonal frequency division multiplexing (OFDM) time domain signal, which occupies one subcarrier in frequency domain and is used by a second device to perform backscatter communication. The first device sends the first OFDM time domain signal to the second device. The first OFDM time domain signal occupies one subcarrier in frequency domain, such that power is concentrated on the subcarrier. When the second device performs backscatter communication based on the first OFDM time domain signal, reliability of backscatter data is improved.

Abstract: Embodiments of this application provide an identification method and apparatus. The method includes: A first device sends a first command to at least one device, where the at least one device includes a second device, the first command is used to obtain first prefix information, the first prefix information includes k bits, and k is an integer greater than or equal to 1. The first device receives a first random number from the second device, where the first random number corresponds to the first prefix information. The first device determines, based on the first random number, that the second device accesses the first device. This application provides the method for identifying the second device by the first device. This can identify the second device, and implement inventory and random access of the second device.

Abstract: An information transmission method and a communication apparatus are disclosed. The method includes: A terminal device receives a first signal sent by a first network device based on a bandwidth of the first signal, where the first signal includes N first symbols, a modulation scheme of each of the N first symbols is ASK or OOK modulation, N is a positive integer, and the first signal is an orthogonal frequency division multiplexing (OFDM) signal; the terminal device determines a duration of the first symbol, where the duration of the first symbol is one of duration of at least one first symbol that is associated with the bandwidth of the first signal; and the terminal device determines, based on the duration of the first symbol, an information bit carried in the N first symbols.

Abstract: A communication method and apparatus are provided. The method includes: A network device determines an OFDM signal, where the OFDM signal carries a first amplitude shift keying symbol, and the first amplitude shift keying symbol is an amplitude shift keying symbol ON; and generates a first signal based on the OFDM signal and N bits, where the first signal carries N second amplitude shift keying symbols in time domain, and N is a positive integer greater than or equal to 2. The network device sends the first signal. According to the foregoing method, information transmission efficiency of an amplitude shift keying modulation scheme can be improved.

Abstract: An information receiving method, an information sending method, and an apparatus are provided. The method includes at least the following: A terminal receives a first frame from a network device based on a first frequency domain width, where the first frame includes first information. The terminal determines a second frequency domain width based on the first information. The terminal receives a second frame from the network device based on the second frequency domain width, where the second frame includes second information, the second frequency domain width is used to determine transmission duration of one bit or symbol in the second information, and the second frame and the first frame are a same frame or different frames.

Abstract: This application provides resource allocation methods and apparatuses. In an implementation, a method includes: receiving, by a first apparatus from a second apparatus, a first index value in a first index value set that comprises a plurality of index values, each index value corresponds to a combination of values of a parameter in a parameter group that comprises a plurality of parameters, the first index value corresponds to a first frequency domain resource; and sending, by the first apparatus, uplink information on the first frequency domain resource.