Abstract: A communication method and apparatus. The communication method includes: a transmitting end device generates an orthogonal frequency division multiplexing (OFDM) time domain signal, where the OFDM time domain signal includes a plurality of amplitude shift keying modulation symbols arranged in time domain; and the transmitting end device sends the OFDM time domain signal to a receiving end device. According to the communication method, an OFDM time domain signal generated by a transmitting end includes a plurality of amplitude shift keying modulation symbols, so that a data transmission rate can be improved.

Abstract: This application provides a communication method, apparatus, and device, and a storage medium. The method includes: A first device determines a time domain resource starting from a start location of communication, where the time domain resource includes a first time domain resource and a second time domain resource, there is at an interval of a first interval duration between the first time domain resource and the second time domain resource, a time domain length of the first time domain resource is related to a first transmission duration, and a time domain length of the second time domain resource is a second transmission duration; and the first device communicates with a second device on the time domain resource. In this way, the first device and the second device communicate with each other in communication systems (such as an NR communication system).

Abstract: A communication method and device. The method includes: inventory indication information sent by a network device to a terminal device includes information for determining a target terminal device. The inventory indication information indicates that the network device selects the target terminal device to initiate a random access request, or the inventory indication information indicates that the network device supports the target terminal device in initiating a random access request. In this way, the network device may select, based on target terminal devices of different types, or target terminal devices having different capabilities, a target device to perform random access, thereby improving random access efficiency of a second device and performance of subsequent data transmission of the target terminal device.

Abstract: A signal sending method and an apparatus. The method includes: a first device sends a first signal to a second device on N orthogonal frequency division multiplexing (OFDM) symbols, where the N OFDM symbols include N1 first symbols, N is an integer greater than or equal to 1, and N1<N. The first device sends a second signal to a third device on at least one of the N1 first symbols. According to the signal sending method and the apparatus, a technology similar to radio frequency identification (RFID) and wake-up radio (WUR) can be introduced to a communication system, and network resource overheads can be reduced.

Abstract: A communication method and system, and a related apparatus. The communication method is applied to the communication system including a first device and a second device. In the communication method, the first device may indicate the second device to reserve a channel resource, and the second device does not perform data transmission on the reserved channel resource. This prevents the second device from occupying channel resources for long time, to release channel resources for a cellular communication system. The first device may schedule a terminal device other than the second device by using the released channel resources. This improves data transmission efficiency.

Abstract: Embodiments of the present invention provide an communications method. For example, the apparatus receives first information that indicates a first offset from a first set of offsets, wherein the first offset is an offset from a first carrier frequency that is multiple of 100 KHz, and then obtains a carrier frequency of a cell according to the first offset indicated by the first information.

Abstract: This application provides a communication method and apparatus, to resolve a problem that security is low when a tag is triggered to perform random access in a communication network. The method includes: receiving first signaling, and determining, based on the first signaling, a second mask stored at a first storage location; and performing random access when a first mask matches the second mask. The first signaling indicates the first storage location and the first mask, the first signaling carries a first mask identifier, and the first mask identifier identifies the first storage location and/or the first mask. In embodiments of this application, a correspondence between a mask identifier and a storage location and/or a correspondence between the mask identifier and a mask are/is negotiated in advance, so that a part or all of masks and storage locations can be implicitly indicated by using a mask identifier.

Abstract: This application provides a signal transmission method and an apparatus, to reduce an envelope ripple of a transmission signal. The method includes: A base station obtains a first bit sequence and maps the first bit sequence to a first modulation symbol sequence, where a value of each modulation symbol in the first modulation symbol sequence belongs to a first constellation point set, the first constellation point set includes K modulation symbols, and each of the K modulation symbols has a different amplitude. The base station sequentially performs a DFT, weighting, and an IFFT on each modulation symbol in the first modulation symbol sequence to obtain a first signal. Based on the foregoing solution, an envelope ripple of the signal generated by the base station in time domain is small. This facilitates demodulation of the transmission signal by a terminal.

Abstract: This application provides a power control method, an apparatus, and a system, to ensure a coverage area as much as possible while reducing interference to transmission in a first communication network, and reduce deployment costs and complexity of interference coordination between first devices while ensuring the coverage area. The method includes: A first device sends an excitation signal to a terminal device at a first power; and sends a communication signal to the terminal device at a second power, where the communication signal is used to bear information, and the second power is less than the first power. At least one of the first power and the second power may be indicated by a second device to the first device.

Abstract: Embodiments of this application disclose a communication method and a related apparatus. The method includes: receiving first information from an access network device; entering a first state based on the first information; receiving, in the first state, wake-up information from the access network device, and skipping receiving, in the first state, one or more pieces of the following information from the access network device: a paging message, a synchronization signal, or a system message; and leaving the first state based on the wake-up information, and receiving the one or more pieces of information from the access network device; or leaving the first state based on the wake-up information, and initiating a random access request. With the low-power first state introduced, power consumption of a terminal device is reduced.

Abstract: A method for generating a video corpus is provided, and specifically includes: obtaining a video to be processed, where the video to be processed corresponds to voice content, and some video images of the video to be processed include a subtitle corresponding to the voice content; and obtaining, based on the voice content, a target video clip from the video to be processed, and using a subtitle included in a video image in the target video clip as an annotation text of the target video clip, to obtain a video corpus. In this way, the video corpus can be automatically generated. Impact on segmentation precision caused by a subjective cognitive error in a manual annotation process can be avoided. Further, efficiency of generating the video corpus is generally high.

Abstract: A signal generation method is disclosed, to enhance an anti-interference capability and a coverage area of a signal. The method includes: A first device obtains a first signal based on transmission information through channel encoding, where the transmission information includes information that the first device needs to send to a second device; the first device generates a second signal based on the first signal through repetition or frequency spread transformation; the first device generates a third signal based on the second signal through linear encoding; and the first device generates a target signal based on the third signal through signal modulation, where the target signal is sent to the second device. Associated devices are also described.

Abstract: This present disclosure discloses example communication methods and communications apparatuses. One example communication method includes a terminal device determining a first offset of a first power class and a second offset of the first power class when a power class of the terminal device is the first power class. A compensation amount of the first power class is determined based on the first offset and the second offset. A determination as to whether to camp on a first cell is made based on the second offset and the compensation amount of the first power class.

Abstract: A data transmission method and a device thereof are provided for tag access. The provided method includes: An answer device receives first signaling sent by a read/write device. The first signaling carries target flag information. The target flag information is used to determine the answer device. First flag information of the answer device matches the target flag information. The answer device determines a first slot, and sends first access information to the read/write device in the first slot. In the provided method, the first slot is determined, to avoid collision of different slots in a same slot in a next round, reduce a collision probability, and improve tag access efficiency.

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: This application discloses a tag positioning method. In this application, a target tag receives first signaling sent by a target reader/writer, where the first signaling includes an identity ID of a first transmitter. The target tag sends second signaling to the target reader/writer, where the second signaling includes the ID of the first transmitter. Further, the target reader/writer may determine, based on the ID that is of the first transmitter and that is included in the signaling sent by the target tag, a coverage area that is of a transmitter and in which the target tag is located, to more accurately determine a location of the tag. Therefore, efficiency of tag positioning is improved.

Abstract: This application provides a communication method and a communication apparatus. The method includes: A first device determines first indication information, where the first indication information indicates at least one second device to access the first device when access needs to be performed; and the first device sends the first indication information. In this way, a reader/writer may provide an access opportunity for a tag device that needs to perform access, to improve system efficiency and reduce a missed reading rate.

Abstract: A communication method, applied to a radio frequency identification communication system, and the radio frequency identification communication system includes a reader/writer and a tag connected to the reader/writer. The method includes: the reader/writer receives first information sent by the tag, where the first information is the 1st piece of information that is sent by the tag and that is received by the reader/writer in an inventory process. The reader/writer may identify, in the inventory process, tags of different types based on a capability that is of the tag and that is actively reported by the tag.

Abstract: A sensing communication method and an apparatus that may resolve a problem of mutual interference caused when different readers use a same resource to communicate with a tag. A network device schedules a sensing resource of the reader to the reader. The reader sends a sensing signal based on the scheduled sensing resource, and senses a sensing signal of another reader, to obtain a sensing result. The reader sends the sensing result. The reader receives information for determining a resource for communication between the reader and the tag. The reader uses the communication resource to communicate with the tag. The sensing resource is scheduled by the network device, so that communication efficiency between the reader and the tag can be improved.

Abstract: Embodiments of the present invention provide an communications method. For example, the apparatus receives first information that indicates a first offset from a first set of offsets, wherein the first offset is an offset from a first carrier frequency that is multiple of 100 KHz, and then obtains a carrier frequency of a cell according to the first offset indicated by the first information.