Abstract: This application provides a communication method and apparatus. The method includes: determining, according to a first rule or a second rule, a first discontinuous reception (DRX) cycle outside a paging time window of first extended discontinuous reception (eDRX) configured by a core network device, and monitoring paging outside the paging time window of the first eDRX based on the first DRX cycle. The first rule is used to determine a DRX cycle of a terminal device in an idle state inside the paging time window of the first eDRX, and the second rule is used to determine a DRX cycle of a terminal device in an inactive state outside the paging time window of the first eDRX.

Abstract: This application provides a configuration enabling method and an apparatus. The method includes: A first terminal device determines first indication information, where the first indication information indicates an enabling operation determined for a first sidelink, the enabling operation includes enabling a sidelink discontinuous reception SL DRX configuration for the first sidelink, or disabling an SL DRX configuration for the first sidelink, and the first sidelink is a sidelink between the first terminal device and a second terminal device. The first terminal device sends the first indication information to the second terminal device. According to the method provided in this application, the first terminal device introduces an SL DRX configuration enabling mechanism based on a status or a requirement of the second terminal device. This improves user experience.

Abstract: A communication method includes deriving a first key. The first key is determined based on a second key by using a first parameter value. The second key is a master key. The first parameter value is a 1st parameter value in a first set. The first set includes a plurality of parameter values associated with a secondary node to which a first cell belongs. The parameter value is a secondary node counter value. The communication method also includes deriving a third key based on the first key. The third key is one or more of a user plane key or a control plane key. The third key is used to perform encryption or data integrity protection on one or more of data or signaling between a terminal device and the first cell.

Abstract: This application provides a multi-path data flow steering method and an apparatus, and relates to the field of communication technologies. The method includes: a communication device obtains a data flow, where the data flow includes a first group of protocol data unit sets and a second group of protocol data unit sets. The communication device determines a steering mode that is based on each group of protocol data unit sets, and sends the first group of protocol data unit sets on a first path. The communication device sends the second group of protocol data unit sets on a second path.

Abstract: Methods of ascertaining a location of an apparatus, and associated systems are disclosed. An example method includes: receiving, by a terminal device or a chip thereof, a plurality of assistance data including one or more groups of mapping relationships corresponding to one or more preset angles, and each group of mapping relationships includes a mapping relationship between each of one or more PRS resource identifiers and power information corresponding to each PRS resource identifier at a corresponding preset angle. The terminal device determines power information corresponding to one or more PRS resource identifiers which correspond to each of a plurality of to-be-measured angles. The terminal device ascertains its location based on the plurality of assistance data and the power information corresponding to the one or more PRS resource identifiers at each of the plurality of to-be-measured angles.

Abstract: A communication method includes: determining to request a first system information message; and sending first information, wherein first bit information in the first information is used to request the first system information message, N bit information sets in the first information correspond to N types of system information messages, the first bit information belongs to a first bit information set comprised in the N bit information sets, the first system information message belongs to a system information message of a first type corresponding to the first bit information set, the N types comprise the first type, and N is an integer greater than 1.

Abstract: Embodiments of this application provide a communication method and apparatus. The method includes: A terminal device obtains first information, where the first information is used to change a state of a main communication module of the terminal device, and the terminal device includes the main communication module and a secondary communication module. The terminal device switches the main communication module from a first state to a second state based on the first information, where the first state includes: the main communication module is in an idle state, an inactive state, and a connected state. Based on the foregoing solution, the terminal device can adjust the state of the main communication module based on the first information, that is, can control state switching of the main communication module, which helps save power of the terminal device.

Abstract: The method includes: establishing, by a terminal device, a first connection to a first network device and a second connection to a second network device, where the first connection and the second connection are used to process a first service; and sending, by the terminal device, first information to the first network device if the terminal device determines that a second service needs to be processed, where the second service is different from the first service, where the first information is used to request to disable the first connection or the second connection, or the first information is used to indicate the terminal device to communicate with a third network device or establish a third connection to the third network device, where the third connection is used to process the second service.

Abstract: This application provides a data transmission method and a communication apparatus, and relates to the communication field. In the method, a transmitting end may sequentially deliver k consecutive PDU sets to m protocol entities in a first sequence, and sequentially send the k PDU sets. When k>m, k?m consecutive PDU sets starting from the (m+1)th PDU set in the k PDU sets are sequentially delivered to the m protocol entities in the first sequence, priorities of the m protocol entities are different from each other, and m>1.

Abstract: This application provides a wireless communication method, a communication apparatus, and a communication system. After a first terminal device receives a paging message, if the first terminal device is currently in a process of small data transmission, the first terminal device does not need to send a radio resource control (RRC) resume request message to a network side again, but may wait for a network side device to send an RRC resume message. Therefore, unnecessary power consumption overheads can be reduced, processing complexity of the terminal device can be reduced, and signaling overheads can be reduced.

Abstract: A communication method and apparatus, a storage medium, and a chip system relate to the field of communication technologies, to reduce a bit error and/or a packet loss. In this application, a terminal device receives configuration information from a network device, where the configuration information is used to configure a first carrier. The terminal device sends first information to the network device. The first information indicates to stop data transmission on the first carrier. The first information further indicates that the terminal device stops measurement on the first carrier. Therefore, the network device may determine that a reason for receiving no measurement result of the first carrier from the terminal device is that a first terminal device does not measure the first carrier, rather than another reason, and then the network device can activate a carrier more properly.

Abstract: A communication method, including receiving, by a terminal device, first information sent from a network device in a radio resource control (RRC) connected state, where the first information indicates to the terminal device to receive a multicast service in an RRC non-connected state, entering the RRC non-connected state, and receiving the multicast service in the RRC non-connected state via a first cell, wherein the first cell is a serving cell of the terminal device in the RRC connected state.

Abstract: In accordance with an embodiment, a method includes: mapping, based on an attribute of a protocol data unit (PDU) set, a PDU in the PDU set to one or more transmission paths, wherein each transmission path of the one or more transmission paths has a different characteristic; and sending the PDU in the PDU set on the one or more transmission paths, where a quantity of the one or more transmission paths is less than or equal to a quantity of attribute values of a same type of attribute of the PDU set.

Abstract: This application provides a communication method and an apparatus. The communication method includes: after determining a first uplink data transmission moment and a first duration, determining, by a terminal device, a first moment based on the first uplink data transmission moment and the first duration, and monitoring a control channel based on the first moment. In this way, the terminal device may send a power headroom report (PHR) to a network device based on the control channel detected through monitoring at the first moment, so that efficiency of feeding back the PHR by the terminal device can be effectively improved.

Abstract: A communication method and an apparatus, the method including determining, by a first terminal, first hybrid automatic repeat request (HARQ) information associated with a first sidelink grant, where the first sidelink grant is associated with carrying data between the first terminal and a second terminal, and where the first HARQ information comprises a first HARQ process identifier associated with the first sidelink grant, and sending, by the first terminal, the first HARQ information to the second terminal through a sidelink, where the sidelink is a direct wireless communication link between the first terminal and the second terminal.

Abstract: A method and an apparatus for controlling a timer are disclosed. In the method, after user equipment activates a first bandwidth part in response to a first message, the user equipment controls a target timer to perform timing based on a unit time length of a second bandwidth part to optimize the timer in a BWP scenario.

Abstract: A communication method and apparatus are applied to fields such as V2X, vehicle to everything, an intelligent connected vehicle, assisted driving, and intelligent driving. The method includes: a first terminal device determines a first new data indicator NDI based on an identifier of a first destination address and an identifier of a first hybrid automatic repeat request HARQ process, where the first NDI is included in first sidelink control information SCI, and the first SCI is used to schedule first data; and the first terminal device sends, through a sidelink, the first SCI and/or the first data to a second terminal device.

Abstract: A reflective quality of service QoS method and an apparatus are provided, to implement uplink layered QoS, and implement more refined uplink QoS management. The method includes: A terminal device determines to enable a first reflective QoS manner, and determines a first rule in the first reflective QoS manner. The first rule includes a QoS rule and/or a QoS flow to data radio bearer DRB mapping rule. The terminal device identifies classification information of a packet in the first reflective QoS manner, where the classification information is for distinguishing between packets in a same internet protocol IP flow.

Abstract: A communication method and apparatus includes: A communication device determines at least one first packet in first duration. The at least one first packet belongs to a same PDU set, the first duration is determined based on a first interval or burst duration, the first interval is a time interval at which the communication device obtains two adjacent PDU sets in time domain, and the burst duration is duration of one PDU set. Then, the communication device sends the at least one first packet.

Abstract: Example communication methods and apparatus are described. One example method includes determining by a terminal that a first transmission resource conflicts with a second transmission resource. The first transmission resource is a resource used by the terminal to send first information to a first network side device. The first network side device corresponds to a first user identity supported by the terminal. The second transmission resource is a resource used by the terminal to send second information to a second network side device. The second network side device corresponds to a second user identity supported by the terminal. The terminal sends the first information on the first transmission resource. The terminal cancels sending the second information on the second transmission resource. Alternatively, the terminal sends the second information on a third transmission resource, where the third transmission resource is a resource before or after the second transmission resource.