Abstract: This application discloses a synchronization signal sending method and a related device. The method includes: generating, a first synchronization signal sequence and a second synchronization signal sequence, where the first synchronization signal sequence is a sequence obtained based on a first m-sequence, the second synchronization signal sequence is a sequence obtained based on a Gold sequence, the Gold sequence is generated based on a second m-sequence and a third m-sequence, and a generator polynomial of the first m-sequence is the same as a generator polynomial of the second m-sequence; mapping, the first synchronization signal sequence onto M subcarriers in a first time unit to obtain a first synchronization signal, and mapping the second synchronization signal sequence onto M subcarriers in a second time unit to obtain a second synchronization signal, where M and N are positive integers greater than 1.

Abstract: This application provides an uplink power control method and apparatus. A network side device sends a plurality of pieces of configuration information of an RACH to UE, and indicates, by using a scheduling message of the RACH, identifier information of the configuration information of the RACH used by the UE. The UE calculates a transmit power of the RACH based on the configuration information that is of the RACH and that is corresponding to the identifier information, and sends a random access preamble to the network side device based on the transmit power of the RACH.

Abstract: A control information transmission method, a base station, and user equipment are disclosed. The transmission method includes: sending, by a base station, first control information on a second carrier, where the first control information is used by the base station to send data on a first carrier according to the first control information; and sending, by the base station, the data on the first carrier according to the first control information; where duration of a transmission time interval of the first carrier is less than duration of a transmission time interval of the second carrier.

Abstract: The present disclosure relates to a method for measuring and feeding back channel state information. In one example method, a user equipment (UE) receives a first channel state information report type configured by a base station and K channel state information-reference signal (CSI-RS) resources transmitted by the base station. The UE determines, according to the first channel state information report type, at least one of a rank indication (RI) and a beamforming indication (BI) on S subbands of a wideband on which the K CSI-RS resources are transmitted. The UE calculates a channel quality indicator (CQI) on the S subbands The UE reports the determined at least one of the RI and the BI, and the calculated CQI on a physical uplink control channel (PUCCH) by using a report.

Abstract: This application discloses a method for indicating PDSCH receiving information, a data receiving method, and an apparatus. According to this application, a network device generates first indication information, where the first indication information is used to indicate physical downlink shared channel PDSCH receiving information, and the PDSCH receiving information includes information identical to physical downlink control channel PDCCH receiving information; and the network device transmits the first indication information over a PDCCH. This application can be used to improve efficiency of indicating PDSCH receiving information, thereby improving PDSCH receiving performance.

Abstract: This application provides a communication method and a communications device. The method includes: after a terminal sends a first preamble to a network device, determining, by both the terminal and the network device, a scramble value of a first RAR according to an ith time unit, a first frequency domain resource, and a maximum RAR time window length, where the ith time unit is a first time unit corresponding to a first time domain resource, the maximum time window length includes M time units, and M equals to an integer multiple of a quantity of time units included in a system frame of each system parameter in a plurality of system parameters for communication between the terminal and the network device. Therefore, RAR detection accuracy may be improved.

Abstract: This application provides a data transmission method, a network device, and a terminal device. The method includes: generating, by the network device, first information, where a value of a bit included in the first information is used to indicate a demodulation reference symbol (DMRS) port combination in a second set, each DMRS port combination in the second set belongs to a first set, the first set includes a plurality of DMRS port combinations, the DMRS port combination includes at least one DMRS port, and a quantity of DMRS port combinations included in the second set is less than a quantity of DMRS port combinations included in the first set; and sending, by the network device, the first information to the terminal device. According to embodiments of this application, signaling overheads can be reduced.

Abstract: Embodiments of the present disclosure provide a channel state information (CSI) sending method, a CSI receiving method, a terminal, and a base station. The terminal selects a target CSI process from N CSI processes. The terminal sets a CSI reporting mode corresponding to the target CSI process, and sends, based on the CSI reporting mode, a CSI corresponding to the CSI process. The terminal can set a CSI reporting mode corresponding to a CSI process, and send, based on the set CSI reporting mode, a CSI corresponding to the CSI process. However, in the prior art, only the base station configures a CSI reporting mode corresponding to each CSI process. Therefore, flexibility is increased.

Abstract: This application discloses a synchronization signal sending method and a related device. The method includes: generating a first synchronization signal sequence and a second synchronization signal sequence, where the first synchronization signal sequence is a sequence obtained based on a first m-sequence, the second synchronization signal sequence is a sequence obtained based on a Gold sequence, the Gold sequence is generated based on a second m-sequence and a third m-sequence, and a generator polynomial of the first m-sequence is the same as a generator polynomial of the second m-sequence; mapping the first synchronization signal sequence onto M subcarriers in a first time unit to obtain a first synchronization signal, and mapping the second synchronization signal sequence onto M subcarriers in a second time unit to obtain a second synchronization signal, where M and N are positive integers greater than 1.

Abstract: Example methods and apparatus for determining broadcast information are described. One example method includes receiving at least two broadcast channels by user equipment, where each broadcast channel includes a reference signal and broadcast information. The user equipment determines whether the broadcast information included in the at least two broadcast channels is the same based on the reference signals of the at least two broadcast channels. According to the methods and apparatus in this application, a terminal device may directly determine whether the broadcast information included in the at least two broadcast channels is the same by using the reference signals.

Abstract: One example method includes receiving, by a terminal device, configuration information of a control channel resource set, where the configuration information indicates the control channel resource set, and the configuration information includes at least one of a quantity of time-frequency resource blocks of a control channel and an interval between two adjacent time-frequency resource blocks, determining, by the terminal device, a time-frequency resource of the control channel based on the configuration information, and receiving, by the terminal device, control information on the time-frequency resource of the control channel.

Abstract: The present invention provides methods for transmitting and receiving a control channel, a base station, and a user equipment. The method for transmitting a control channel includes: determining m PRB pairs used for transmitting a control channel to be transmitted; when a distributed transmission mode is used for transmission, determining an aggregation level L of the control channel to be transmitted; determining, according to the aggregation level L, a first control channel candidate at the aggregation level L; and placing, on physical resources to which the first control channel candidate is mapped, control information of the control channel to be transmitted, and transmitting the control information. The present invention improves multiplexing efficiency of control channels of different modes.

Abstract: This application discloses a channel quality information reporting method and apparatus, to resolve a prior-art problem that a communication link transmission failure is caused due to movement of user equipment. The method includes: sending, by a network device, P1 first reference signals to user equipment on a first reference signal resource, and sending P2 second reference signals to the user equipment on a second reference signal resource; performing, by the user equipment, channel quality measurement on the received first reference signal and the received second reference signal; and reporting, by the user equipment to the network device, M reference signal resource indexes, channel quality information corresponding to the M reference signal resource indexes, and reference signal types or reference signal resource set indexes corresponding to the M reference signal resource indexes.

Abstract: Embodiments provide a method for generating a random access channel ZC sequence, and an apparatus. A method for generating a random access channel ZC sequence includes: generating, by a base station, notification signaling, where the notification signaling instructs user equipment (UE) to generate a random access ZC sequence by using a second restricted set in a random access set; and sending, by the base station, the notification signaling to the UE, so that the UE generates the random access ZC sequence by using the second restricted set, where the random access set includes an unrestricted set, a first restricted set, and the second restricted set; and the second restricted set is a random access set that the UE needs to use when a Doppler frequency shift of the UE is greater than or equal to a first predetermined value.

Abstract: This application discloses a reference signal configuration method and apparatus. Before a network device sends reference signals aperiodically, the network device sends configuration information to a terminal device, where the configuration information is used to indicate a timeslot offset of one or more reference signal resource sets. Therefore, the network device can flexibly send reference signals in different timeslots, thereby reducing a quantity of times of reference signal triggering and measurement result reporting, and improving efficiency of a communications system.

Abstract: A channel quality information transmission method and system are described. A terminal device determines a reporting priority of channel quality information according to a reporting priority rule when reporting of first channel quality information conflicts with reporting of second channel quality information. The device further determines to-be-reported content or to-be-discarded content based on the reporting priority of the channel quality information. The terminal device reports the to-be-reported content to a network device.

Abstract: The present disclosure includes example resource selection methods and apparatuses. The example method includes configuring a CSI process for a second device, where the CSI process corresponds to configuration information of K reference signal resources or configuration information of K reference signal antenna port groups. A reference signal is sent to the second device according to the configuration information corresponding to the CSI process, so that the second device obtains a corresponding channel quality measurement result by measuring the reference signal, where the channel quality measurement result includes a precoding matrix indicator (PMI). The PMI is used to indicate a serial number of a precoding matrix selected by the second device, and the selected precoding matrix is a matrix in a preset precoding matrix set, where the preset precoding matrix set is determined according to K and a quantity T of beams to be selected.

Abstract: The present disclosure relates to beam configuration methods and apparatus. One example method include receiving, by a terminal, beam configuration information from a network device, where the beam configuration information is used to instruct the terminal to transmit a signal by using a first beam, and transmitting, by the terminal, the signal by using at least the first beam when a first preset duration starting from a time point expires, where the first time point is a time point at which the terminal sends an acknowledgement (ACK) message for the beam configuration information to the network device.

Abstract: A method includes: determining, by a terminal device within a discontinuous reception period, an occasion set for paging of the terminal device based on a terminal device identifier, where the occasion set for paging includes at least two occasions for paging; and receiving, in a time range corresponding to the occasions for paging included in the occasion set for paging, a paging message. One discontinuous reception period is partitioned into a plurality of occasion sets for paging, and one occasion set for paging includes at least two occasions for paging. After determining, within a discontinuous reception period, a corresponding occasion set for paging, the terminal device may receive a paging message on an occasion for paging included in the occasion set for paging.

Abstract: The present application discloses a method for feeding back channel state information (CSI), comprising: acquiring first and second CSI based on a first and a second CSI measurement resource respectively, obtaining a channel quality indicator (CQI) based on the first CSI and the second CSI, wherein the first CSI comprises a first and a second type of precoding matrix indicator (PMI1 and PMI2) and a first rank indicator (RI1), and the second CSI comprises a first and a second type of PMI (PMI3 and PMI4) and a second RI (RI2); and feeding back third CSI to a base station, wherein the third CSI comprises third PMI information, third RI information, and the CQI, wherein the third PMI information is obtained based on at least three of the PMI1, the PMI2, the PMI3, and the PMI4, and the third RI information is obtained based on the RI1 and the RI2.