Abstract: In an embodiment a method for enhancing a physical downlink control channel, the method includes obtaining, by a terminal device, control-resource set (CORESET) configuration information, wherein the CORESET configuration information is used for configuring a time-domain resource and a frequency-domain resource of a CORESET, wherein the time-domain resource comprises X time-domain symbols, wherein the X time-domain symbols are consecutive in time domain, wherein X is an integer greater than or equal to 1 and less than or equal to M, and wherein M is an integer greater than or equal to 4 and determining, by the terminal device, a physical downlink shared channel (PDSCH) time-domain resource configuration set based on the X time-domain symbols, wherein the PDSCH time-domain resource configuration set is for PDSCH time-domain resource allocation.

Abstract: A frequency domain resource determination method, a device, and a storage medium.

Abstract: This application provides an uplink signal sending method, an apparatus, and a system, and generally relates to the field of communications technologies. The uplink signal sending method includes obtaining first indication information, and determining, based on the first indication information, whether to send an uplink signal on a supplementary uplink (SUL) or an uplink (UL). The first indication information is used to indicate a SUL available time, and the SUL available time is a time in which an uplink signal can be sent on an SUL carrier in a preset period. The method is applied to a procedure in which an uplink signal is sent by using an uplink carrier, to improve flexibility in an uplink signal sending process.

Abstract: The present disclosure relates to retuning methods and apparatus. One example method includes determining a first resource and a second resource, where the first resource is used to receive a physical downlink control channel (PDCCH) or physical downlink shared channel (PDSCH), the first resource is determined based on a first frequency domain resource and M consecutive symbols of a downlink pilot timeslot in a special subframe, the second resource is used to send a sounding reference signal (SRS), the second resource is determined based on a second frequency domain resource and an uplink pilot timeslot in the special subframe, all or a part of the second frequency domain resource is not in the first frequency domain resource, and determining, in the last N consecutive symbols of the downlink pilot timeslot, a guard period for retuning.

Abstract: Embodiments of this application relate to the communications field, and provide an information sending and receiving method, an apparatus, and a system, to reduce resource overheads used by a (reduced-capability) terminal device to report a capability parameter. The method is as follows: A terminal device sends first information to a network device, where the first information indicates that the terminal device is a first-type terminal device, a capability parameter corresponding to the first-type terminal device includes a first capability set, the first capability set includes a channel bandwidth supported by the terminal device and a quantity of transmit antennas of the terminal device, the channel bandwidth of the terminal device is less than 100 megahertz, and the quantity of transmit antennas of the terminal device is less than 4. Embodiments of this application are applied to a massive machine-type communications mMTC service scenario or another service scenario of 5G NR.

Abstract: Embodiments of this application provide a communication method, apparatus, and system. The method includes: After determining first downlink control information DCI, a network device sends the first DCI to a terminal device. Further, the terminal device receives the first DCI from the network device, and receives downlink data from the network device or sends uplink data to the network device based on the first DCI. The first DCI is for uplink or downlink data scheduling, a bit quantity of the first DCI is fixed, the first DCI includes a first identifier, the first identifier indicates a format of the first DCI, and the format of the first DCI includes a first DCI format or a second DCI format.

Abstract: This application provides a switching method, it is determined that a switching delay of a first terminal device switching from a first bandwidth unit to a second bandwidth unit is a first delay, where the first delay is less than a second delay, and the second delay is a switching delay supported by a second terminal device. Alternatively, it is determined that a switching delay of a first terminal device switching from a first bandwidth unit to a second bandwidth unit is one of N delays, where the N delays are switching delays supported by the first terminal device, N is an integer greater than or equal to 2, and the N delays include a first delay. Therefore, switching between bandwidth units may be performed more quickly. In this case, the first terminal device may quickly perform dynamic data transmission within a large system bandwidth.

Abstract: A terminal device receives first information from a network device, where the first information indicates transmission direction information and/or service load information. The terminal device receives downlink control information DCI from the network device based on the first information. The network device may configure a DCI transmission mode by using the first information based on a characteristic of a to-be-transmitted service of the terminal device.

Abstract: A reference signal sending method, a reference signal receiving method, and an apparatus are provided. A first network device determines a first resource. The first network device generates a reference signal corresponding to the first resource. The reference signal includes M parts, and all of the M parts are the same. The first resource does not carry a cyclic postfix of the reference signal. Alternatively, the first resource carries a cyclic prefix of the reference signal and the cyclic prefix corresponding to the reference signal is located only at the start of the 1st part in the M parts. M is a positive integer. The first network device sends the reference signal to a second network device on the first resource.

Abstract: The technology of this application provides a control information transmission method, so that sizes of different downlink control information (DCI) can be aligned, thereby reducing types of DCI sizes and reducing power consumption when a terminal detects DCI. The method includes a terminal device detecting first DCI in a first search space, where the first DCI is used to indicate an active bandwidth part (BWP) of the terminal device, a size of the first DCI and a size of second DCI are aligned, the second DCI can be sent by a network device to the terminal device in a first common search space, and the second DCI is used to schedule a system message, a paging message, or a random access response (RAR).

Abstract: This application provide a control information transmission method, an apparatus, and a system. One example method includes: A first terminal device receives, from a network device, DCI used for indicating a BWP. A quantity of bits in the DCI is a fixed quantity of bits. The DCI is used for scheduling a physical data channel. The BWP is used to transmit the physical data channel.

Abstract: This application provides a random access method, an apparatus, and a system. The method includes: A network device determines M RACH resource sets, where the M RACH resource sets correspond to N terminal types, the N terminal types are determined based on bandwidth types and/or random access types of terminals, and M and N are positive integers; and then sends RACH configuration information to at least one terminal, where the RACH configuration information indicates the M RACH resource sets, the M RACH resource sets are used by the at least one terminal to send a random access request to the network device, and a bandwidth type of any one of the at least one terminal belongs to the bandwidth types for determining the N terminal types.

Abstract: Embodiments of this application provide a random access response method and an apparatus. The method includes: RARs associated with one RO are transmitted based on groups, so that a transport block size of RAR data transmitted each time is reduced, and N bits in DCI format 1_0 of CRC are scrambled by using a RA-RNTI to indicate scheduling information of N RAR groups in a PDSCH. Alternatively, DCI format 1_0 of CRC is scrambled by using identifiers of RAR groups, to correspondingly schedule the RAR groups in the PDSCH. According to this application, a problem of a large transport block caused by a large quantity of RARs being transmitted in a PDSCH can be avoided, so that a modulation order or a bit rate is reduced, and demodulation performance of a terminal device is improved.

Abstract: A resource configuration method, apparatus and storage medium are disclosed. The method includes: sending, by a network device, first information to a terminal, where the first information is used by the terminal to determine not to send data and/or receive data on a first resource; and the first information includes first indication information used to indicate a first resource block (RB) and second indication information used to indicate a subcarrier occupied by the first resource on the first RB; or the first information includes third indication information used to indicate a first subcarrier, and the first subcarrier is used to determine the first resource. The resource configuration method and apparatus and the storage medium that are provided in the present disclosure can improve resource configuration flexibility.

Abstract: Various embodiments provide a communication method, a communications apparatus, and a computer-readable storage medium. In those embodiments, a first transmit power can be determined for transmitting first information in a first time unit on a first carrier and a second transmit power can be determined for transmitting second information in a second time unit on a second carrier. A third transmit power can be determined for transmitting the second information in a first time period and transmitting the second information in a second time period using the second transmit power or the third transmit power. The second information can be sent in the first time period using the third transmit power. In those embodiments, a sum of powers used by a terminal device to transmit two uplink carriers in a same time period does not exceed a maximum transmit power of the terminal device.

Abstract: The present disclosure provides example signal sending and receiving methods, apparatuses, and devices. One example signal sending method includes a network device sending a first wake-up signal to indicate a terminal device to receive a first data channel, where the first data channel carries at least one of a paging message or a short message, and the short message indicates at least one of whether a system message changes or whether to receive earthquake and tsunami warning system (ETWS) information or commercial mobile alert service (CMAS) information. The first data channel is sent by the network device.

Abstract: A random access method and an apparatus. In one example: A terminal device receives a first wake-up signal, and then determines N random access channel occasions based on a correspondence between the first wake-up signal and the N random access channel occasions. The terminal device determines a first random access channel occasion in the N random access channel occasions, and sends a random access preamble on the first random access channel occasion. A network device uses, as a reception beam, a beam used to send the first wake-up signal, to receive the random access preamble sent by the terminal device.

Abstract: A communication method and apparatus relate to the field of communication technologies, to enable a network device to support communication of a new type of terminal device without additionally sending a set of complete system information. The method includes: The network device sends a SIB1 and supplementary information. Maximum transmission bandwidth of a first terminal device is different from that of a second terminal device. The supplementary information includes first information and/or second information, the SIB1 does not include the first information, and a parameter value of the second information included in the supplementary information is different from a parameter value of the second information included in the SIB1. After receiving the SIB1 and the supplementary information, the second terminal device accesses a network based on partial information other than the second information in the SIB1 and the supplementary information. Consumed resources for downlink transmission can be reduced.

Abstract: This application provides a method and an apparatus for transmitting initial access configuration information. The method includes: a first terminal device receiving first information that is sent by a network device and that includes initial access configuration information corresponding to a second terminal device. The first terminal device may obtain second information, required by the first terminal device, based on a relationship such as a difference relationship between the second information required by the first terminal device and the first information. The second information includes initial access configuration information corresponding to the first terminal device.

Abstract: An apparatus includes one or more processors and a memory having instructions stored thereon that, when executed by the one or more processors, cause the apparatus to receive a first wake-up signal. The first wake-up signal is one of K wake-up signals, K is an integer greater than or equal to 1, and the K wake-up signals are quasi co-located with K synchronization signal blocks (SSBs), K channel state information-reference signals (CSI-RSs), or K demodulation reference signals (DMRSs). The apparatus is also caused to determine M paging occasions. There is a correspondence between the K wake-up signals and the M paging occasions, and M is an integer greater than or equal to 1. The apparatus is further caused to receive, on the M paging occasions, downlink control information (DCI) used for paging.