Abstract: This application provides a resource indication method and an apparatus, to reduce energy consumption of a network device, and relates to the field of wireless communication technologies. In the method, a terminal device receives first signaling, where the first signaling indicates M physical random access channel (PRACH) resources. The terminal device receives first indication information, where the first indication information indicates N PRACH resources in the M PRACH resources, M is an integer greater than 1, and N is a positive integer less than or equal to M. The terminal device sends a preamble on a first random access channel occasion (RO) in the N PRACH resources, or sends a preamble on a first RO in (M-N) PRACH resources. Therefore, a quantity of times that a base station sends system information can be reduced, and energy consumption of the base station can be effectively reduced.

Abstract: In a communication method, a terminal apparatus receives from a network apparatus first information that indicates that transmission of a first channel is not allowed in a first time period. The first channel includes all uplink channels or all downlink channels. Based on the first information, the terminal apparatus skips transmitting the first channel in the first time period.

Abstract: An uplink control information transmission method are described. The method includes: receiving indication information, where the indication information is used to indicate a first physical uplink control channel (PUCCH) resource and a quantity N of repeated transmissions. The method further includes determining the first PUCCH resource and the quantity N of repeated transmissions in at least one PUCCH resource set based on the indication information; and repeatedly sending uplink control information uplink control information (UCI) for M times by using the first PUCCH resource and the quantity N of repeated transmissions.

Abstract: A communication method is provided. The communication method includes: a terminal receives a first synchronization signal in a first cell, and receives first information in the first cell based on the first synchronization signal. The first information indicates time-frequency-code information of a second synchronization signal of a second cell or a random access configuration of the second cell. The terminal receives N second synchronization signals in the second cell, and sends a random access signal in the second cell based on the N second synchronization signals or the random access configuration of the second cell, where N is a positive integer.

Abstract: A communication method and apparatus are provided. The method includes: a terminal device receives first indication information from a first cell, and performs cell selection or reselection based on the first indication information, where the terminal device camps on the first cell, and the first indication information indicates the terminal device to perform cell selection or reselection, so that a first terminal device accesses another cell to reduce a quantity of terminal devices served by the first cell, and further reduce energy consumption of a communication system. Because the terminal device is indicated to perform cell selection or reselection, the terminal device can be enabled to perform normal communication.

Abstract: An information transmission method and a communication apparatus are provided. The method may include: A terminal device receives first information from a network device through a first carrier, where the first information includes at least one of the following: resource information used by the terminal device to access the network device through a second carrier, partial information or all information in first common information, and resource information for transmitting second common information through the second carrier, where the first common information and the second common information are used by the terminal device to access the network device through the second carrier; and the terminal device performs message transmission with the network device through the second carrier.

Abstract: A communication method and apparatus are provided. The method includes: A network device sends first information to a terminal device in a first frequency unit, the terminal device receives the first information from the network device in the first frequency unit, the first information indicates a first periodicity in which the network device sends common information in a second frequency unit, and the terminal device detects the common information in the second frequency unit based on the first periodicity. A detection periodicity of a common signal is flexibly configured, so that efficiency of detecting the common information by the terminal device can be improved, flexibility of initial access to the network device performed by the terminal device can be improved, and user experience can be improved.

Abstract: This application relates to communication technologies, and provides a channel key-based encryption method and an apparatus, to resolve a problem that a terminal cannot avoid an attack from a false base station before a security mode is enabled, and a security risk. The method includes: A network device broadcasts a system information block, indicating that channel key generation is supported, where the system information block includes a preamble and a resource configuration of a physical random access channel; receives, on the physical random access channel, a first message from a user equipment, where the first message includes the preamble; sends a second message to the user equipment, where the second message includes configuration information of a first time-frequency resource; receives, on the first time-frequency resource, a third message from the user equipment; and performs channel measurement based on the third message, to obtain a channel key.

Abstract: Embodiments of this application provide a communication method and apparatus. The method includes: A terminal device determines m uplink channels, where the m uplink channels include a first channel and second channel, the first channel includes high priority information and low priority information, the second channel comprises the high priority information but does not comprise the low priority information, the m uplink channels overlap in time domain, and a sum of powers of the m uplink channels is greater than a maximum transmit power of the terminal device; and the terminal device sends n uplink channels according to a first rule, the first rule comprises: a transmit power allocation order of the first channel is the same as a transmit power allocation order of the second channel.

Abstract: Embodiments of this application provide a communication method and apparatus. The method includes: A network device generates a plurality of pieces of first information, where the first information includes at least one of a synchronization signal or system information; and the network device sends the plurality of pieces of first information to a terminal device on a same time domain resource and a plurality of frequency domain resources. Correspondingly, the terminal device receives one or more pieces of first information. According to embodiments of this application, time domain overheads for sending the synchronization signal and/or the system information by the network device can be reduced, and sending power consumption of the network device can be reduced, to facilitate energy saving of the network device.

Abstract: Embodiments of this application provide an initial access method and an apparatus. In the method, an SSB for space division multiplexing is introduced, that is, a plurality of SSB beams are simultaneously sent on a same time-frequency resource, so that time domain overheads of the SSB are reduced without reducing resolution of the SSB beam.

Abstract: This application discloses a resource indication method and a communication apparatus. The method includes: A terminal device receives first indication information from a network device. The first indication information indicates a first frequency domain resource. The terminal device transmits a first channel on the first frequency domain resource. The first frequency domain resource belongs to a first frequency domain unit of a BWP, the BWP further includes a second frequency domain unit, and a transmission direction of a signal on the second frequency domain unit and a transmission direction of a signal on the first frequency domain unit are independently configured, so that resource indication is more flexible, and resource conflicts are reduced.

Abstract: An initial access method and an apparatus are provided. In the method, an RS set corresponding to an SSB is introduced. The SSB is sent by using a wideband and a wide beam, and an RS in the RS set occupies a small quantity of time domain resources through frequency division multiplexing and is sent by using a narrow beam. A transmit beam of the RS in the RS set is a refinement of a transmit beam of the SSB. Narrow beam training is completed by using the RS set, to find an optimal narrow beam pointing to a UE, so that in the method, time domain resource overheads of the SSB can be effectively reduced while communication efficiency is ensured.

Abstract: This application discloses a communication method and apparatus, and relates to the wireless communication field, so that a frequency resource may be flexibly scheduled, a transmission delay is low, and resource utilization is high. The method includes: receiving, from a network device, first indication information used by a terminal to determine a plurality of first frequency units in a first frequency unit set, and detecting first control information on a frequency unit in the plurality of first frequency units, where the first frequency unit is a candidate frequency unit for carrying the first control information, and the first control information is used to schedule data transmission on a second frequency unit.

Abstract: A 2-bit high-power amplifying non-reciprocal reflective metasurface is provided. The metasurface comprises a plurality of metasurface units distributed in an array; each metasurface unit comprises a first metal layer, an intermediate layer, and a second metal layer which are sequentially stacked; the second metal layer comprises a receiving metal patch and a transmitting metal patch; two diodes are both positioned on a longitudinal central axis of the receiving metal patch; orientation of the slot on the transmitting metal patch is orthogonal to orientation of the slot on the receiving metal patch; the first metal layer comprises a phase shifter, which comprises first series diodes and second series diodes forming a reconfigurable 90-degree phase-shift circuit.

Abstract: This application provides a feedback information transmission method and a related apparatus. When the first PUCCH resource overlaps the downlink symbol or the flexible symbol in time domain, the terminal device may switch the HARQ feedback information to another time unit for sending. This resolves low data transmission reliability because the HARQ feedback information cannot be sent and is discarded when the first PUCCH resource overlaps the downlink symbol or the flexible symbol.

Abstract: This application relates to capability reporting methods and apparatuses. An example method includes determining target capability information. The target capability information includes third capability information. The third capability information indicates that a terminal device can perform multiplexing between overlapping uplink channels with different priorities. The example method further including reporting the target capability information.

Abstract: This application provides a communication method and apparatus. The method includes: A terminal device receives first information sent by a first network device, and the terminal device sends second information to a second network device, where the second information is determined based on the first information. The first network device is a service device of the terminal device, and the second network device is an interference device of the terminal device; or the first network device is an interference device of the terminal device, and the second network device is a service device of the terminal device. The terminal device communicates with the service device and the interference device, so that when the interference device performs information transmission, communication between the terminal device and the service device of the terminal device can be avoided.

Abstract: A communication method and apparatus. for indicating indicate A terminal is indicated to perform second transmission when an SSB or a PRACH on a frequency domain resource overlaps with reverse transmission on another frequency domain resource in time domain. In response to the SSB or the PRACH overlapping with the second transmission in time domain, the terminal device determines, by receiving first indication information, that a priority of the SSB or the PRACH is lower than a priority of the second transmission on an overlapped time domain resource. The terminal device performs the second transmission based on the first indication information. The terminal device performs reverse transmission on a symbol that overlaps with the SSB or the PRACH.

Abstract: In a signal transmission method and apparatus, a network device sends scheduling information of at least one of two carriers whose communication directions are opposite on a target OFDM symbol; a terminal device performs channel transmission of a target carrier on the target OFDM symbol based on the scheduling information, where the target carrier is one of carriers that are of the two carriers whose communication directions are opposite and that have channel transmission on the target OFDM symbol; and the network device performs channel transmission on the target OFDM symbol and the target carrier. A time domain resource may be allocated to a carrier on which transmission scheduling is currently performed, thereby improving transmission resource utilization and reducing a waiting delay.