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: 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: 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: 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 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 communication apparatus are described. In one example method, a terminal device obtains first information, where the first information is different from second information, the first information is used to determine a start time of a first timer in a first hyper system frame, and the second information is used to determine a start time of a first timer in a second hyper system frame. The terminal device determines, based on the first information and a first parameter, the start time of the first timer in the first hyper system frame, where the first parameter is drx-StartOffset, and the first timer is a discontinuous reception on-duration time.

Abstract: This application discloses a HARQ process control method and an apparatus, and relates to the field of communications technologies. The method includes: A first terminal apparatus determines that a TB transmitted in a first HARQ process is a first TB transmitted for the last time or a newly transmitted TB; and stops a first timer. Further, the first terminal apparatus sends, to a second terminal apparatus, first indication information used to indicate that the TB transmitted in the first HARQ process is a newly transmitted TB. The second terminal apparatus receives the first indication information, and stops a second timer based on the first indication information.

Abstract: This application provides a data packet integrity protection method and apparatus, and a storage medium. A first network device configures a terminal to perform integrity protection on a part of data packets in a MAC PDU. After receiving a first data packet and a second data packet from the terminal, a second network device sends the first data packet, the second data packet, and first indication information to the first network device, to indicate that the two data packets belong to a same MAC PDU. When failing to perform integrity verification on the first data packet based on the first indication information fails, the first network device discards the foregoing two data packets. This reduces complexity of integrity protection.

Abstract: Embodiments of this application provide a communication method and a communication apparatus. If a preset condition is satisfied, a terminal device skips sending first channel state information CSI at first time, where the preset condition includes at least one of the following: The first time does not belong to active time of a first discontinuous reception DRX and that the first time does not belong to active time of a second DRX set; the first time does not belong to active time of a first DRX and that the first time belongs to active time of a third DRX set; neither a first timer nor a second timer set is run at the first time; or a first timer is not run but a third timer set is run at the first time.

Abstract: This application provides a communication method and a communication apparatus. The method includes: receiving first DCI from a network device; and determining, based on the first DCI, that first data scheduled by the first DCI includes a first SIB 1, where the first SIB 1 includes information related to network access in a first operation mode. The first DCI includes first indication information, and the first indication information indicates that the first data includes the first SIB 1. Alternatively, one or more of the following information associated with the first DCI is different from that associated with second DCI: scrambling information, DCI format information, time domain or frequency domain resource information, the second DCI is used to schedule a second SIB 1, and the second SIB 1 includes information related to network access in a second operation mode.

Abstract: The method is used to page, by using a paging message, a terminal device that joins a multicast service, so that the terminal device attempts to enter an RRC connected state to receive data of the multicast service. In this application, the terminal device receives a first paging message, and initiates radio resource control RRC connection resume when a first condition is met. The first condition includes: The first paging message includes an identifier of a first multicast service and does not include an identifier of the terminal device; or the first paging message includes the identifier of the first multicast service and a first identifier of the terminal device, where the first identifier is associated with RAN paging.

Abstract: A communication processing method, a communication processing apparatus, and a system, to improve resource utilization. A first terminal device generates first information. The first terminal device sends the first information to a network device, where the first information is used to indicate any one or more of the following content: information indicating that the first terminal device releases a first resource; the first resource released by the first terminal device; and information indicating that the first terminal device requests a second resource from the network device.

Abstract: A random access method, including receiving, by a terminal device, a synchronization signal and physical broadcast channel block (SSB), determining, by the terminal device, a frequency domain position of a random access occasion based on a frequency domain position of the SSB, and initiating, by the terminal device, random access based on the random access occasion, where the random access occasion comprises a frequency domain resource determined based on the frequency domain position of the random access occasion.

Abstract: In a communication method, a first user equipment sends first data to second user equipment over a sidelink (SL); and if the first user equipment does not receive first feedback information, the first user equipment initializes a first counter, or keeps a count value of the first counter unchanged, where the first feedback information indicates whether the second user equipment successfully receives the first data and the first counter is used for RLF detection.

Abstract: A sidelink communication method and apparatus are provided. The method includes: A first communication device receives sidelink control information from a second communication device. The first communication device starts a first timer based on an SL HARQ feedback resource, where the SL HARQ feedback resource is used for transmitting a HARQ feedback of the sidelink control information or SL data scheduled by using the sidelink control information. The first communication device starts or skips starting a second timer based on the first timer. According to the method of embodiments of this application, the first communication device can start the first timer and the second timer associated with SL DRX.

Abstract: A terminal device obtains a first group of parameters corresponding to a first mode. A network device obtains a second group of parameters corresponding to the first mode, where the first group of parameters correspond to the second group of parameters. When a compatibility problem exists between the terminal device and the network device, the terminal device initiates initial access to the network device based on the first group of parameters, and the network device accepts, based on the second group of parameters, the initial access initiated by the terminal device.

Abstract: Embodiments of this application provide a discontinuous reception control method, the method is as follows: receiving first control information transmitted in a unicast manner, where the first control information is for scheduling first data transmitted in a multicast manner; and performing, by a communication apparatus, any one or more of the following actions: starting or restarting a first timer, where the first timer indicates duration after newly transmitted control information or newly transmitted data is scheduled; stopping a second timer, or starting or restarting a second timer, where the second timer indicates duration in which the communication apparatus receives retransmitted data; and starting or restarting a third timer, where the third timer indicates waiting duration before the communication apparatus receives the retransmitted data, where the timers are timers corresponding to DRX associated with multicast.

Abstract: A cell selection or reselection method includes that a terminal device obtains first information that corresponds to a first cell and that is not specific to a frequency band or a frequency. When a first condition that corresponds to the first information and that is used to determine whether the terminal device can access the first cell is not met, the terminal device is allowed to select or reselect a cell on a same frequency as the first cell.