Abstract: A communication method and an apparatus are provided, to implement inter-cell interference randomization. The method includes: generating a demodulation reference signal based on a first parameter, where the first parameter includes a radio frame number of a radio frame for sending the demodulation reference signal; and sending the demodulation reference signal and a first channel, where the first channel is for carrying uplink control information, and the demodulation reference signal is a reference signal for demodulating the first channel.

Abstract: This application relates to the field of wireless communication technologies, and in particular, to a time control, an apparatus, and a system. This application provides a timer control method, including: When downlink control information indicates data transmission of N hybrid automatic repeat request HARQ processes and a terminal device is configured with the N HARQ processes, where N is an integer greater than or equal to 2, a discontinuous reception inactivity timer is not started or the discontinuous reception inactivity timer is stopped. This application reduces time required by the terminal device to monitor a downlink channel or downlink data through control by the timer, thereby reducing power consumption of the terminal device.

Abstract: A communication method includes: determining a preamble including M symbol groups; and sending the M symbol groups in K uplink subframe sets, where any uplink subframe set in the K uplink subframe sets includes one uplink subframe or more than one consecutive uplink subframes, any two uplink subframe sets in the K uplink subframe sets are spaced by at least one downlink subframe, and in each of the K uplink subframe sets at least one symbol group can be sent; N times of frequency hopping exist in the M symbol groups, each of the N times of frequency hopping is frequency hopping between adjacent symbol groups in the M symbol groups, and frequency hopping directions of at least two of the N times of frequency hopping are opposite, N is less than M, K is less than or equal to M, and K, N and M are positive integers.

Abstract: This application provides an information transmission method, a terminal device, and a network device. In technical solutions of this application, a target time interval in which a physical downlink control channel is not monitored or DCI is not sent is determined based on a value relationship between a quantity of TBs scheduled by the DCI and a first value, and a solution of sending and monitoring a physical downlink control channel in a scenario in which one piece of DCI schedules a plurality of TBs is specified, so that the physical downlink control channel can be effectively sent and monitored.

Abstract: This application provides a system message transmission method, an apparatus, and a system. A first communications device configures a MIB message, and the MIB message may carry various different information used to transmit a SIB1, for example, any one or more of scheduling information, first information, and an operation mode of a carrier, so that a second communications device receives the SIB1 based on the MIB message. The first communications device may flexibly configure information used to transmit the SIB1. In addition, when configuring the MIB message, the first communications device may consider ensuring, through configuration or implicit indication, that resource locations for transmitting SIB1s of different cells in one period are different. This type of interference isolation mechanism can avoid mutual interference between transmission of SIB1s of different cells, so that transmission reliability of the SIB1s can be improved.

Abstract: A communication method and apparatus are provided, where the method includes: determining, by a first device according to a first preset rule, a first resource in at least two preset resources corresponding to a same gap before a first paging occasion PO; and monitoring, by the first device, at least one wake-up signal sequence on the first resource. According to the foregoing method, the first resource used by the first device for monitoring the wake-up signal sequence is determined according to the first preset rule.

Abstract: The present disclosure discloses example communication methods and an example communication device. One example communication method includes receiving, by a communication device and from a first network device in a first communication system, a first access parameter used to access the first communication system and a second access parameter used to access a second communication system, where a system bandwidth of the first communication system is different from a system bandwidth of the second communication system. The first communication system is switched by the communication device to the second communication system based on the second access parameter when a switching condition of switching from the first communication system to the second communication system is satisfied.

Abstract: Embodiments of this application provide a random access preamble transmission method and an apparatus. The method includes: obtaining, by a terminal device, a scrambling code sequence, scrambling a random access preamble by using the scrambling code sequence, and sending a scrambled random access preamble to a network device. In this technical solution, the terminal device scrambles the random access preamble, and sends the scrambled random access preamble over a channel, to effectively eliminate inter-cell interference and resolve a possible target cell false alarm problem.

Abstract: An information sending method and an apparatus are provided. In the method, after sending a first message including uplink data to a network device, a terminal device receives first DCI from the network device, where the first DCI may include first indication information, and the first indication information is used to indicate that the network device has successfully demodulated the first message or used to indicate the terminal device to flush a HARQ buffer corresponding to the first message; and the terminal device may obtain the first indication information from the first DCI, and after obtaining the first indication information, the terminal device determines not to monitor a PDCCH search space within first duration after the first DCI. After sending the uplink data and receiving the first indication information from the network device, the terminal device may not monitor the PDCCH search space within specific duration.

Abstract: Embodiments of this application provide a solution for network and terminal devices that have inconsistent understandings of retransmission scheduled by using downlink control information (DCI). The solution includes: A network device sends first DCI to a terminal device, and the terminal device receives the first DCI from the network device, where the first DCI includes a first field and a second field, the first field indicates that a retransmitted transport block (TB) exists in a TB scheduled by using the first DCI, and the second field indicates an index of a retransmitted first TB in the TB scheduled by using the first DCI; and the terminal device receives the retransmitted first TB from the network device based on the first field and the second field; or the terminal device sends the retransmitted first TB to the network device based on the first field and the second field.

Abstract: In one embodiment, a terminal device and a network device each determine a quantity M of hybrid automatic repeat request (HARQ) processes supported by the terminal device. The network device sends downlink control information (DCI) to the terminal device. The DCI includes a first field that indicates a quantity N of transport blocks (TBs) scheduled by the DCI, where N is a positive integer greater than 1. If M=1, the terminal device receives or sends, in the HARQ process, an initially transmitted TB and/or a retransmitted TB in the N TBs scheduled by the DCI. If M is greater than 1, and N is less than or equal to M, the terminal device receives or sends, in N HARQ processes in the M HARQ processes, the N TBs scheduled by the DCI, where each of the N HARQ processes corresponds to one TB in the N TBs.

Abstract: A monitoring method and an apparatus are provided. The method includes transmitting, by a terminal device, first information based on a first repetition number, where the first repetition number is less than or equal to a second repetition number, and the second repetition number is a maximum repeat transmission number of the first information. The method also includes determining, by the terminal device, a scheduling end moment of the first information based on the second repetition number, where the scheduling end moment of the first information is a transmission end moment of the first information when the first information is transmitted based on the second repetition number. The method further includes starting or restarting, by the terminal device, a timer at the scheduling end moment of the first information, and monitoring a PDCCH search space before the timer expires or stops.

Abstract: The present disclosure relates to data scheduling methods, apparatus, and systems. In one example method, a network device sends, to a terminal device, downlink control information (DCI) used to schedule N transport blocks (TBs). After determining that a downlink channel that carries first M TBs in the N TBs is transmitted in consecutive first downlink time units, the network device sends the downlink channel to the terminal device. The terminal device receives the downlink channel. After determining that ACKs/NACKs corresponding to the M TBs are transmitted in consecutive first uplink time units, the terminal device sends the ACKs/NACKs corresponding to the M TBs to the network device. N is a positive integer greater than 1, and M is a positive integer greater than 1 and less than or equal to N.

Abstract: Example uplink transmission resource requesting methods and apparatus are described. One example method includes a terminal determines that a collision occurs when the terminal sends a first request to a network device, where the first request is used to request the network device to schedule an uplink transmission resource for the terminal. The terminal adjusts a manner of sending the first request according to a preset rule. In embodiments of this application, the terminal may request the uplink transmission resource from the network device by using the first request.

Abstract: Embodiments of this application disclose a signal transmission method and a related device, to transmit a signal between a network device and a terminal device. The method in the embodiments of this application includes: sending a first synchronization signal/broadcast channel block SSB to a first terminal device, where the first SSB includes a synchronization signal and a physical broadcast channel PBCH, the synchronization signal and the PBCH use a frequency division multiplexing FDM manner in resource occupation, a quantity of orthogonal frequency division multiplexing OFDM symbols occupied by the synchronization signal is greater than 2, and a quantity of OFDM symbols occupied by the PBCH is greater than 3.

Abstract: A message transmission method and device relating to the field of communications technologies are described that improve an anti-interference capability in message transmission. The method includes generating a scrambling code according to a scrambling code initialization seed, wherein the scrambling code initialization seed meets the following expression: cinit=R·2a7+P·(nƒ mod k+1)·2b7 and then scrambling a message according to the scrambling code. The method further includes sending the scrambled message to a terminal on a physical downlink shared channel. Because the first time parameter has different values at at least two different moments, scrambling codes determined at the at least two corresponding different moments are different. Therefore, a possibility at which the base station uses a same scrambling code to scramble a same system message repeatedly in a time period is reduced, so that an anti-interference capability in system message transmission is improved.

Abstract: A data sending method, a data receiving method, a device, and a system, the receiving method including receiving indication information from a network device, where the indication information indicates a first resource used to transmit uplink data, and where the first resource overlaps with a first early data transmission (EDT) physical random access channel resource, and delaying, in response to determining that a preset condition is satisfied, transmission of the uplink data, where the delaying transmission of the uplink data comprises sending the uplink data to the network device on a second resource, and where the second resource is non-overlapping with the first EDT physical random access channel resource.

Abstract: A message transmission method and device relating to the field of communications technologies is disclosed, so as to improve an anti-interference capability in message transmission. The method includes: generating, by a base station, a scrambling code according to a first time parameter; then scrambling a system message according to the scrambling code; and finally sending the scrambled system message to a terminal on a physical broadcast channel. In this technical solution, because the first time parameter has different values at at least two different moments, scrambling codes determined at the at least two corresponding different moments are different. Therefore, a possibility at which the base station uses a same scrambling code to scramble a same system message repeatedly in a time period is reduced, so that an anti-interference capability in system message transmission is improved.

Abstract: This application provides example communication methods and apparatuses. One example method includes performing, by a network device on a preconfigured resource, data demodulation on uplink data from a terminal device. The network device can then send downlink control information (DCI) to the terminal device, where the DCI includes first indication information, and if the uplink data fails to be demodulated, or it is determined, based on a result of the data demodulation, that the terminal device needs to retransmit the uplink data, the first indication information indicates either the terminal device to initiate random access or EDT and retransmit the uplink data or that the uplink data fails to be demodulated.

Abstract: A channel quality measurement method and apparatus are described. The method can include a network device sending configuration information to a terminal device. The configuration information configures a downlink carrier set. The terminal device determines a first downlink carrier from the downlink carrier set. The terminal device sends a random access process message 3 (Msg3) to the network device. The random access process message 3 includes first information. The first information includes information indicating channel quality of the first downlink carrier. The channel quality provides information about a first repetition level to the network device. The first repetition level is a minimum repetition level required when transmission performed on a downlink channel based on a preset transmission parameter meets a preset block error rate.