Abstract: A signal transmission method and a communication apparatus are provided. The method may include: A terminal device monitors a wake-up signal in a first time window, where the wake-up signal indicates information about at least one terminal device that needs to be woken up. The terminal device determines, based on a result of monitoring the wake-up signal in the first time window, whether to monitor the wake-up signal in a first time period after the first time window. The method provided in embodiments may be applied to a communication system, for example, a 5G communication system or an NR communication system, an LTE communication system, a V2X communication system, a D2D communication system, an M2M communication system, an MTC communication system, or an internet of things communication system.

Abstract: This application provides a base station switching method and an apparatus. The method includes: A terminal sends one piece of binding signaling that carries SIM card binding information to a source base station; the terminal switches a plurality of SIM cards from being connected to the source base station to being connected to the target base station; and the terminal sends radio resource control reconfiguration complete information to the target base station, where the radio resource control reconfiguration complete information includes information about the plurality of SIM cards that complete the switching operation.

Abstract: This application discloses a communication method and a related product. The method includes: sending a first message, where the first message includes a first link configuration parameter, and the first link configuration parameter is used to establish a first link; and receiving a first acknowledgement message sent by a second user terminal, where the first acknowledgement message is used to indicate that the second user terminal completes establishment of the first link to the first user terminal.

Abstract: Example wake-up signal detection methods and apparatus are described. One example method includes determining, by a terminal device, N physical downlink control channel (PDCCH) monitoring occasions before an active time DRX ON. The terminal detects a wake-up signal (WUS) on M PDCCH monitoring occasions of the N PDCCH monitoring occasions, where M is less than N, and both N and M are positive integers greater than 1.

Abstract: A method for determining a hybrid automatic repeat request (HARQ) feedback resource includes determining, by a transmit end, the HARQ feedback resource of a receive end based on processing capability information of the receive end of a priority of data transmitted between the transmit end and the receive end, where the HARQ feedback resource carries HARQ information corresponding to the data transmitted between the transmit end and the receive end, and sending, by transmit end to the receive end, indication information indicating the HARQ feedback resource.

Abstract: Example communication methods and apparatus are described. One example method includes: A first access network device in a public land mobile network (PLMN) currently accessed by a terminal device obtains home public land mobile network (HPLMN) information of the terminal device, where the PLMN currently accessed by the terminal device is different from an HPLMN of the terminal device. The first access network device sends first information to the terminal device based on the HPLMN information of the terminal device, where the first information is related to the HPLMN of the terminal device, and the first information is used by the terminal device to perform measurement, HPLMN search, or reselection.

Abstract: A communications method includes the terminal device receiving a first message from a network device, where the first message indicates a second cell, the second cell includes a first downlink carrier and a second uplink carrier, and a duplex mode of a band to which the first downlink carrier belongs is different from a duplex mode of a band to which the second uplink carrier belongs, and the terminal device accesses the second cell.

Abstract: In accordance with an embodiment, a physical uplink control channel transmission method, includes: receiving a first message; and in response to a dedicated physical uplink control channel (PUCCH) not being configured for a terminal device, repeatedly transmitting a first PUCCH using a repetition quantity N, where the dedicated PUCCH is configured by a network device for the terminal device based on higher layer signaling, and N is an integer greater than 1.

Abstract: A communication method includes receiving a paging message, wherein the paging message comprises a first identifier. The first identifier is useable to identify a paged first terminal device. A bit length of the first identifier is less than a bit length of a second identifier. The second identifier is a 5th generation-system-temporary subscriber identity (5G-S-TMSI) or a radio network temporary identity (I-RNTI). The communication method further includes determining, based on the first identifier, that the first terminal device is paged.

Abstract: Embodiments of this application provide a communication method. The method includes: the terminal device receives a first paging indication from a network device and determines based on a first paging indication and a target bit, whether to monitor a paging message; wherein a total quantity of subgroups comprised in all paging occasions (POs) associated with the first paging indication is determined based on a quantity of all the POs associated with the first paging indication and a quantity of subgroups comprised in each of all the POs associated with the first paging indication.

Abstract: Embodiments of this application relate to the field of communication technologies, and provide a communication method and apparatus to indicate, by using limited bits in paging DCI or PEI, a plurality of reference signal resource sets or SSBs corresponding to a plurality of reference signals. The method includes: A terminal device receives, from a network device, first DCI that includes reference signal availability indication information, and determines, based on the first DCI, whether a reference signal is sent. The reference signal availability indication information includes one or more indication bits. Each indication bit is associated with one or more reference signal resource sets, or associated with one or more SSBs.

Abstract: A method for stopping monitoring a physical downlink control channel. A network device sends first DCI to a terminal device on an active DL BWP. The terminal device runs a timer, where the timer is used for BWP switching. The terminal device stops, based on the first DCI, monitoring a PDCCH within a first duration, and suspends running of the timer. The terminal device continues to run the timer after the first duration. The terminal device performs DL BWP switching when the timer expires. The network device runs a timer, suspends running of the timer within a first duration, and continues to run the timer after the first duration. The network device performs DL BWP switching when the timer expires.

Abstract: A terminal device receives a first system information change indication on a WUR link, and/or determines, on the WUR link, that a cell is changed, where the first system information change indication indicates that system information is changed. The terminal device receives the system information on an NR link if the system information is changed, before establishing or restoring a connection on the NR link. If the terminal device determines that the system information is not changed, the terminal device may not need to receive the system information. For example, the terminal device may directly establish or restore the connection on the NR link when the terminal device does not need to receive the system information.

Abstract: Embodiments of this application provide an information transmission method and an apparatus. The method may include: A terminal device receives area identification information from a network device through a first frequency resource; and the terminal device performs an area update procedure or receives system information based on the area identification information through a second frequency resource. According to this application, transmitting common information on a WUR link can prolong working duration of the terminal device on the WUR link, improve energy saving benefit, and reduce an access delay of the terminal device.

Abstract: Embodiments of this application provide a signal transmission method and an apparatus. The method may include: A terminal device determines a periodicity of a synchronization signal; and the terminal device periodically receives the synchronization signal based on the periodicity of the synchronization signal through a first frequency resource, where the first frequency resource is further used to transmit a wake-up signal, and the wake-up signal indicates information about one or more terminal devices that need to receive paging.

Abstract: This specification discloses a wake-up signal sending method and an apparatus, so that UE may accurately identify information in a WUR signal received via a wake-up circuit. The method may include designing a first time domain resource that is in the following format and that is used to transmit a wake-up signal: The first time domain resource includes N first time units with a preset length, one wake-up signal occupies at least one of the N first time units with the preset length, N is a positive integer, and a boundary location of the first time unit is determined based on a time domain location of a synchronization signal, so that a boundary location of the wake-up signal is determined, and a terminal prepares for identifying the wake-up signal.

Abstract: Embodiments of this application disclose a channel measurement method and device. The method includes: receiving, by an access network device, a sounding reference signal (SRS) from a terminal device; receiving, by the access network device from the terminal device, a power adjustment factor used by first antenna ports, where the first antenna ports are antenna ports used by the terminal device to send a data signal; determining, by the access network device, a first uplink channel based on the SRS; and determining, by the access network device, a target channel based on the first uplink channel and the power adjustment factor used by the first antenna ports, where the target channel is a target uplink channel or a target downlink channel.

Abstract: A terminal receives a power saving signal sent by a network device, where the power saving signal indicates N time units, and where N is greater than 0. The terminal determines a state of the terminal in a first time period corresponding to the N time units on a first frequency domain resource and a state in a second time period corresponding to the N time units on a second frequency domain resource. The state of the terminal includes a sleep state or a wake-up state. The sleep state indicates that the terminal monitors no first signal, and the wake-up state indicates that the terminal monitors a first signal based on a configuration parameter.

Abstract: A method for determining a feedback resource in a sidelink includes a first terminal sending SCI to a second terminal, where the SCI includes indication information. The indication information is used to indicate a first resource or a first resource window to be occupied for sending hybrid automatic repeat request HARQ feedback information by the second terminal, and the first resource window includes a plurality of candidate first resources. The method further includes the first terminal receiving, on the first resource, the HARQ feedback information sent by the second terminal, or monitors, in the first resource window, the HARQ feedback information sent by the second terminal.

Abstract: This application provides a communication method and apparatus. The method includes: A terminal device receives a first signal from a network device; the terminal device receives a second signal based on the first signal; and if the terminal device does not receive the first signal in a first time period, the terminal device receives a third signal. Both the second signal and the third signal indicate paging-related information. If the terminal device does not receive the first signal in the first time period, the terminal device determines to receive the paging-related information by using a procedure of receiving the third signal.