Abstract: This application provides a data transmission method, to indicate resource configuration statuses of at least two groups of CRSs to a terminal device, so that the terminal device can correctly receive data, and improve data receiving performance. The method includes: receiving, by a terminal device, indication information sent by a network device, where the indication information is used to determine resources occupied by N groups of cell-specific reference signals CRSs, and N is a natural number greater than or equal to 2; and determining, by the terminal device based on the indication information, the resources that are occupied by the N groups of CRSs, and receiving data based on the resources that are occupied by the N groups of CRSs.

Abstract: Embodiments of the present disclosure provide a downlink synchronization method, an apparatus, and a system, and relate to the communications field, so as to reduce downlink synchronization complexity and improve downlink synchronization efficiency. According to the downlink synchronization method, abase station sends downlink synchronization reference information to UE by using dedicated signaling or a system message, where the downlink synchronization reference information is used to instruct the UE to perform downlink synchronization in a second cell by referring to a downlink synchronization channel of a first cell; and the base station sends, in the second cell according to location information of the UE, a beam including a downlink synchronization channel to the UE, where the first cell and the second cell include an overlapped coverage area. The embodiments of the present disclosure are applied to synchronization channel sending.

Abstract: This application provides a data transmission method, a terminal, and a network device. The method includes: receiving, by a terminal, first indication information and second indication information, where the first indication information is used to indicate at least one group of resources, the at least one group of resources corresponds to at least one group of antenna ports or at least one group of codewords, the second indication information is used to indicate the at least one group of codewords and QCL configuration information of the at least one group of antenna ports, or the second indication information is used to indicate the at least one group of antenna ports and QCL configuration information of the at least one group of antenna ports; and determining, by the terminal, the at least one group of resources based on the first indication information and the second indication information.

Abstract: An uplink reference signal transmission method is disclosed. User equipment receives first configuration information of a first uplink measurement reference signal and second configuration information of a second uplink measurement reference signal from a wireless network device. The first configuration information is used to configure a time-frequency resource of the first uplink measurement reference signal, and the second configuration information is used to configure a time-frequency resource of the second uplink measurement reference signal. The first uplink measurement reference signal is a zero-power uplink measurement reference signal, and the second uplink measurement reference signal is a non-zero-power uplink measurement reference signal.

Abstract: Embodiments of the present invention provide a communication method. A first network device configures power configuration information for each of at least two precoding matrix groups, and sends the power configuration information to a second network device. The power configuration information is used to indicate a power configuration of a corresponding precoding matrix group of the at least two precoding matrix groups, and the at least two precoding matrix groups belong to a same resource used to measure channel state information CSI. When the second network device performs CSI measurement, different power values of different precoding matrix groups can be considered, thereby increasing accuracy of the CSI measurement.

Abstract: A method includes: generating, by a first network device, parameter information of a resource in which a channel state information CSI reference signal is located, where the parameter information is used by the second network device to determine one or more of the following information of the resource in which the CSI reference signal is located: subcarrier spacing information, cyclic prefix length information, frame structure time length information, and symbol quantity information; and sending, by the first network device, the parameter information to the second network device.

Abstract: Embodiments of the present invention provide a channel state information measurement method, including: receiving, by user equipment, configuration information for channel state information measurement from a radio network device, where the configuration information includes information about a resource for channel state information measurement and indicates information about a measurement attribute of the resource, and the measurement attribute includes channel measurement, or X types of interference measurement, or channel measurement and X types of interference measurement, where X is an integer greater than or equal to 1; and measuring, by the user equipment, channel state information based on the configuration information, and feeding back the channel state information. The method is intended to meet different requirements for channel state information measurement in different scenarios of coordinated multipoint in a future network.

Abstract: This application provides a data sending method and an apparatus. The method includes performing, by a node, soft modulation to generate a modulation symbol. The method also includes preprocessing, by the node, the modulation symbol to obtain to-be-sent data. The preprocessing includes one or more of layer mapping, antenna port mapping, precoding, or transform precoding. The method further includes mapping, by the node, the to-be-sent data to a physical resource, and sending the to-be-sent data by way of the physical resource.

Abstract: A resource allocation method and an apparatus in a communications system are provided. A terminal receives resource allocation indication information, where the resource allocation indication information is used to determine a subband corresponding to an allocated resource. The terminal receives second configuration information, where the second configuration information indicates one of a plurality of configurations of the first frequency domain resource unit size corresponding to the subband. And the terminal determines a size of a first frequency domain resource unit corresponding to the subband based on first configuration information and the second configuration information, where the first configuration information includes a correspondence between the subband and a plurality of configurations of the first frequency domain resource unit size.

Abstract: This application provides a communication method, a network device, a terminal device, and a system. The communication method includes: determining, by a network device, a plurality of pieces of quasi co-location information, where the plurality of pieces of quasi co-location information correspond to a plurality of antenna port sets of a first control resource set, and each piece of quasi co-location information in the plurality of pieces of quasi co-location information is used to indicate a quasi co-location characteristic of an antenna port set corresponding to each piece of quasi co-location information; and sending, by the network device, the plurality of pieces of quasi co-location information to a terminal device. In embodiments of this application, the plurality of pieces of quasi co-location information are used to indicate the quasi co-location characteristics of the antenna ports to the terminal device, to improve communication efficiency.

Abstract: An image is accepted by one or more processing circuits from a user depicting the user's facial skin. Machine learning models stored in one or more memory circuits are applied to the image to classify facial skin characteristics. A regimen recommendation is provided to the user based on the classified facial skin characteristics.

Abstract: Embodiments of this application provide a data transmission method, a network device, and a terminal device. The method includes: determining, by a network device, demodulation reference signal DMRS port groups, where a quantity of the DMRS port groups is greater than or equal to 2; and further, communicating, by the network device, data with a terminal device, where the data is corresponding to a transport block, the transport block is divided into at least one code block group CBG, and each of the at least one CBG is corresponding to one DMRS port group and is mapped to a transport layer corresponding to the one DMRS port group.

Abstract: Embodiments of this application disclose a method used for data transmission. This method is applicable to coordinated transmission/reception in NR, and is relatively flexible. This method includes: determining, by a network device, a plurality of groups of antenna ports, where each group of antenna ports includes at least two antenna ports, and any two antenna ports in a same group of antenna ports meet quasi-co-location QCL; and sending, by the network device, at least one piece of first indication information to a terminal device, where the first indication information is used to determine QCL configuration information corresponding to a target antenna port used for sending first data, the QCL configuration information is used to indicate an antenna port that is QCLed with the corresponding target antenna port.

Abstract: This application provides a communication method, to provide a codebook of a higher-order precoding matrix, and help increase a quantity of layers of data, thereby helping improve a data transmission capability and improving a throughput. The method includes: receiving, by a first device, a reference signal used for channel measurement; and sending, by the first device, at least one precoding matrix indicator PMI and a rank indication RI based on the reference signal, where the PMI is used to indicate a precoding matrix in a codebook corresponding to the RI, the precoding matrix in the codebook includes a plurality of matrices in a one-to-one correspondence with a plurality of antenna port groups, a matrix corresponding to one antenna port group or each of at least two antenna port groups has two different inter-antenna-port-group phase factors, and any two column vectors in the precoding matrix are orthogonal to each other.

Abstract: A wireless communication method and apparatus are disclosed. In an embodiment a wireless communication method includes receiving, by a first device, at least two pieces of timing advance (TA) information, wherein the at least two pieces of TA information are corresponding to at least two beams of the first device on the same carrier and performing, by the first device, timing adjustments on transmissions on the at least two beams based on the at least two pieces of TA information.

Abstract: A feedback information transmission method and apparatus, and the method includes receiving, by a terminal device, N pieces of first data from N first transmission points, where the N first transmission points are in a one-to-one correspondence with the N pieces of first data, each piece of first data includes at least one transport block, and the N pieces of first data are carried on a same carrier, where N?2, and sending, by the terminal device, feedback information of the N pieces of first data on at least one time-frequency resource such that acknowledgement (ACK)/negative ACK (NACK) feedback in coordinated multipoint multi-stream transmission can be implemented.

Abstract: A data sending method includes: performing, by a first node, rate matching to determine a first bit sequence; determining, by the first node, a first symbol sequence based on the first bit sequence, and determining some to-be-mapped symbols in the first symbol sequence; and mapping, by the first node, the symbols to a first resource, and sending the symbols.

Abstract: This application discloses a synchronization information identification method and apparatus, and relates to the communications field. The method includes: receiving, by a terminal, synchronization information; obtaining, by the terminal, a synchronization information index of the synchronization information; determining, by the terminal, a symbol location of the synchronization information in accordance with a correspondence between the synchronization information index and the symbol location.

Abstract: A method includes: generating, by a first network device, parameter information of a resource in which a channel state information CSI reference signal is located, where the parameter information is used by the second network device to determine one or more of the following information of the resource in which the CSI reference signal is located: subcarrier spacing information, cyclic prefix length information, frame structure time length information, and symbol quantity information; and sending, by the first network device, the parameter information to the second network device.

Abstract: An image is accepted by one or more processing circuits from a user depicting the user's skin. Machine learning models stored in one or more memory circuits are applied to the image to classify acne characteristics. An acne severity grade is provided by the one or more processing circuits and a user interface displays the acne severity grade.