Abstract: The present disclosure relates to the field of wireless communications technologies, relates to a signal sending device, a signal receiving device, a symbol timing synchronization method, and a system, and resolves a problem that complexity of symbol timing synchronization performed by a terminal with relatively low crystal oscillator accuracy is high. In a receiving device, a receiving module receives a synchronization signal including a first signal and a second signal. The first signal includes N1 generalized ZC sequences, and the second signal includes N2 generalized ZC sequences. The second signal is used to distinguish different cells or different cell groups. There are at least two generalized ZC sequences with different root indexes in (N1+N2) generalized ZC sequences.

Abstract: A modal information completion method, an apparatus, and a device are provided. A completion apparatus first obtains a modal information group, wherein the modal information group includes at least two pieces of modal information. Then, the completion apparatus may determine, based on an attribute of the modal information group, whether a part or all of first modal information in the modal information group is missing. Subsequently, the completion apparatus determines a target feature vector of the first modal information based on a preset feature vector mapping relationship and a feature vector of second modal information in the modal information group, so that accuracy of the target feature vector of the first modal information is ensured.

Abstract: Embodiments of the present invention provide an information sending method, including: determining, by a base station, first information indicating a first carrier frequency offset, where the first carrier frequency offset is a carrier frequency offset between an actual cell carrier center frequency and a cell carrier center frequency that is obtained by a terminal; and sending, by the base station, the first information to the terminal, where the first information is used to obtain the actual cell carrier center frequency. According to the technical solutions provided in the embodiments of the present invention, quality of communication between the terminal and the base station is effectively improved.

Abstract: A communication method and apparatus to reduce a waiting latency in a retransmission process. A terminal device receives a first PDSCH from a network device. In response to failing to decode data carried on the first PDSCH, the terminal device sends an SRS to the network device on a first time-frequency resource. In response to the network device not receiving feedback information of the first PDSCH, or receiving feedback information of the first PDSCH that is a NACK, the network device retransmits the first PDSCH based on a result of measuring the SRS. After determining that the first PDSCH fails to be decoded, the terminal device directly sends the SRS to the network device by using the first time-frequency resource.

Abstract: The present disclosure discloses a method for transmitting downlink feedback information, a base station, and a terminal device, so as to ensure that the base station correctly receives the downlink feedback information sent by the terminal device, thereby effectively improving a transmission success rate of the downlink feedback information. In embodiments of the present disclosure, the method includes: sending, by the base station, indication information to the terminal device, where the indication information is used to indicate a target time-frequency resource location, the target time-frequency resource location is a time-frequency resource location at which the terminal device sends the downlink feedback information, and the downlink feedback information is used to feed back a reception status of downlink data that should be received by the terminal device; and receiving, by the base station, the downlink feedback information sent by the terminal device.

Abstract: This application provides a communication method and a communications device. The method includes: receiving, by an access network device from a core network device, a first group identifier of a first terminal group and an identifier of a terminal included in the first terminal group; and sending, by the access network device, the first group identifier and a second group identifier of the first terminal group to the terminal included in the first terminal group. The first group identifier and the second group identifier are used to indicate a paging occasion for the first terminal group, and a paging message for the first terminal group is transmitted on a first physical channel. The technical solutions in the embodiments of this application can improve system efficiency.

Abstract: A method and apparatus is provided. The method includes: obtaining downlink control information, wherein the downlink control information is used to schedule downlink data, and the downlink control information carries time information indicating a time at which uplink information is sent; obtaining, through a system message or radio resource control signaling or a resource of a physical random access channel, information indicating a duration for sending the uplink information; receiving the downlink data; and sending the uplink information according to the time information and the information indicating the duration, wherein the uplink information is used to indicates whether the downlink data is correctly received.

Abstract: The present disclosure relates to channel transmission methods, base stations, and terminal devices. One example method includes receiving a first channel from a network device, determining a frame structure used between the network device and a terminal device according to relationship between a transmission parameter set of the first channel and the frame structure, and communicating with the network device according to the frame structure.

Abstract: A communication method and a communications apparatus are provided. The communication method includes: receiving a first message from a shared channel of a plurality of network slices, where the first message includes a plurality of network IDs, and the plurality of network IDs are in a one-to-one correspondence with the plurality of network slices; selecting a target network slice from the plurality of network slices; and obtaining access configuration information of the target network slice from network configuration information, and accessing the target network slice based on the access configuration information of the target network slice, where the network configuration information includes a network ID of each of the plurality of network slices and the access configuration information of the target network slice.

Abstract: This application provides a system message processing method and apparatus. A terminal receives a master information block (MIB), and obtains indication information. The indication information indicates a type of the MIB. In this way, the terminal can process the MIB based on the type of the MIB. In other words, in embodiments of this application, the terminal may decode the MIB based on the type of the MIB. Therefore, the following case is avoided: The MIB is decoded in a fixed manner, and consequently, the MIB cannot be accurately parsed. In this way, communication efficiency is improved.

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: A communication method in a frequency division duplex system is provided. The method includes a first terminal device that receives first dedicated signaling sent by a network device, and obtains a first configuration message. The first terminal device sends, based on the first configuration message, first information to the network device by using a second transmission frame structure, and receives second information that is sent by the network device by using the second transmission frame structure. The second transmission frame structure has a first fixed delay relative to a first transmission frame structure, and the first transmission frame structure is a frame structure that is used by a second terminal device to send third information to the network device and that is used by the network device to send fourth information to the second terminal device.

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 method and apparatus for converting an undirected relationship to a directed relationship, device and storage medium are provided. An implementation of the method includes: determining a graph of undirected relationships between a plurality of subjects based on time characteristics of co-occurrences among the plurality of subjects; acquiring time characteristic intervals of edges between an individual subject and related subjects thereof from the graph of the undirected relationships; sorting the time characteristic intervals, and traversing the time characteristic intervals according to a sorted order, to find a target time characteristic interval not overlapping with a traversed time characteristic interval; and obtaining a directed one-way edge of the individual subject, by using a related subject corresponding to the target time characteristic interval as an end vertex of the one-way edge and using the individual subject as a start vertex of the one-way edge.

Abstract: Embodiments of this application provide a method for transmitting positioning assistance data and a device. The method includes: receiving, by a network device, at least one positioning assistance data message sent by a positioning server, where the at least one positioning assistance data message is used to carry positioning assistance data; and broadcasting, by the network device, a system message to a terminal device, where the system message is used by the terminal device to obtain the positioning assistance data. According to the embodiments of this application, the network device broadcasts the system message to broadcast the positioning assistance data.

Abstract: A communication method applicable to a random access process includes: receiving indication information sent by a network device, where the indication information includes at least one piece of the following information: access probability information of each of a plurality of carriers, access control information of at least one of the plurality of carriers, overload indication information of at least one of the plurality of carriers, power boost information of at least one of the plurality of carriers, and access indication information of one of the plurality of carriers; and determining, based on the indication information, one carrier from the plurality of carriers as a target carrier to perform random access.

Abstract: A method and apparatus is provided. The method includes: obtaining downlink control information, wherein the downlink control information is used to schedule downlink data, and the downlink control information carries time information indicating a time at which uplink information is sent; obtaining, through a system message or radio resource control signaling or a resource of a physical random access channel, information indicating a duration for sending the uplink information; receiving the downlink data; and sending the uplink information according to the time information and the information indicating the duration, wherein the uplink information is used to indicates whether the downlink data is correctly received.

Abstract: The present invention involves the application of Semen Ziziphi Spinosae oil in the preparation of drugs for treating medicinal insomnia. Semen Ziziphi Spinosae oil has a therapeutic effect on insomnia caused by ephedrine, prednisone and other drugs, and Semen Ziziphi Spinosae oil that is prepared within the pressing temperature of 80 to 100° C. has the best efficacy for treating medicinal insomnia.

Abstract: Example communication methods and communications apparatus are described. One example method includes sending resource information of a first frequency band by a base station to a terminal device. The first frequency band includes a first carrier set and a second carrier set. The resource information of the first frequency band includes an identifier of a carrier in the first carrier set and/or an identifier of a carrier in the second carrier set. A carrier in the first carrier set can be used for communication between the terminal device and the base station. A carrier in the second carrier set cannot be used for communication between the terminal device and the base station. The base station communicates with the terminal device based on the resource information of the first frequency band.

Abstract: A communication method and a communications apparatus are provided. The communication method includes: receiving a first message from a shared channel of a plurality of network slices, where the first message includes a plurality of network IDs, and the plurality of network IDs are in a one-to-one correspondence with the plurality of network slices; selecting a target network slice from the plurality of network slices; and obtaining access configuration information of the target network slice from network configuration information, and accessing the target network slice based on the access configuration information of the target network slice, where the network configuration information includes a network ID of each of the plurality of network slices and the access configuration information of the target network slice.