Abstract: Embodiments of the present invention disclose a method for uplink power control, a network node and a system, which relates to the field of communication technologies, and the method includes: a first network node transmits a first indication message to a second network node, wherein the first indication message includes a time pattern and/or a maximum transmission power for an uplink transmission performed by a user equipment (UE) on the second network node, and the time pattern is used for controlling a transmission time of the uplink transmission performed by the UE. The present invention is applicable to uplink power control for the user equipment UE in a carrier aggregation scenario.

Abstract: A data transmission method and an apparatus are provided. The method includes determining, by a first communication apparatus, that transmission of a first data packet has failed, the first data packet being transmitted in a first transmission manner; and sending, by the first communication apparatus, P data packets after the first data packet, the P data packets being sent in a second transmission manner, P is an integer greater than or equal to 1, and a second transmission reliability corresponding to the second transmission manner is greater than the first transmission reliability corresponding to the first transmission manner. In this way, because the first communication apparatus sends the P data packets after the first data packet in the second transmission manner, transmission reliability of the P data packets is improved, so that successful transmission of the P data packets can be effectively ensured, and service interruption can be avoided.

Abstract: This application provides a method for processing timing advance TA of a terminal, and an apparatus. A terminal obtains a correspondence between first TA and a beam, determines, based on the correspondence, the beam corresponding to the first TA, and further determines, based on the beam corresponding to the first TA, whether the first TA is invalid. In other words, in embodiments of this application, the terminal may determine, by using a finer granularity, whether the first TA is invalid, and this helps trigger selection of more appropriate TA. Therefore, compared with a conventional solution, embodiments of this application can further reduce interference between uplink transmission.

Abstract: Embodiments of this application provide a configuration method and apparatus. When indicating, by using an RRC connection release message, a terminal to enter an inactive state from a connected state, a network device may include, in the RRC connection release message, a configuration parameter allocated to the terminal in the inactive state. That is, the terminal receives the radio resource control RRC connection release message sent by the network device, where the RRC connection release message includes first information used to indicate a target configuration parameter. In this way, the terminal may enter the inactive state based on the RRC connection release message, and determine a context parameter of the inactive state based on the first information, so that the configuration parameter is properly allocated to the terminal in the inactive state.

Abstract: A signal transmission method includes receiving configuration information from a network device. The configuration information is used to indicate a serving cell that is allowed or forbidden to be used by a terminal for a first service or first control information. The method also includes adjusting the serving cell that is allowed or forbidden to be used by the terminal for the first service or the first control information. The method further includes transmitting the first service or the first control information by using an adjusted serving cell.

Abstract: A communication method and apparatus are provided. The method includes: A first terminal device determines first information, where the first information includes a result of a channel access process performed on a first resource, and the first resource is used for sidelink communication between the first terminal device and a second terminal device, or is used for communication between the first terminal device and a network device; or the first information includes a resource request message, and the resource request message is used to request a resource for retransmission on a sidelink between the first terminal device and a second terminal device; and the first terminal device sends the first information to the network device.

Abstract: A random access method includes working, by a user equipment (UE), on a first bandwidth part (BWP), where the first BWP is a currently active BWP, when the UE needs to perform a random access procedure, the UE performs the random access procedure on an initial BWP or on the first BWP, and when the UE receives BWP switching indication information from a network device instructing the UE to use a second BWP when performing the random access procedure on the first BWP, continuing, by the UE, to perform the random access procedure on the first BWP, or stopping, by the UE, performing the random access procedure on the first BWP, and performing the random access procedure on the second BWP.

Abstract: Embodiments of this application provide a multicast transmission control method. A terminal side device gives a feedback to an access network side device for a received multicast service, the feedback indicating that the terminal side device successfully receives the multicast service or fails to receive the multicast service, so that the access network side device can learn a status of the sent multicast service. This facilitates optimization of transmission of the multicast service.

Abstract: A network slice multicast method includes generating, by an access network device, a first message. The network slice multicast method further includes sending, by the access network device, the first message to a user equipment (UE). The first message comprises a first network slice identifier and configuration information of a multicast traffic channel, and the first network slice identifier corresponds to the multicast traffic channel.

Abstract: Example message transmission methods and apparatus are provided. One example method includes obtaining a first correspondence by a core network device, where the first correspondence includes a correspondence between target device information and first time sensitive networking (TSN) domain information. The target device information is used to identify a target device, and the first TSN domain information is used to identify a TSN domain to which a first TSN device belongs. The core network device receives a multicast message from a second TSN device, where the multicast message includes second TSN domain information which is used to identify a TSN domain to which the second TSN device belongs. The core network device sends the multicast message to the target device when determining, based on the second TSN domain information and the first correspondence, that the second TSN device and the first TSN device belong to a same TSN domain.

Abstract: A communications method and apparatus are provided. The method includes: A first access network device sends a first message to a core network device, where the first message is used to indicate to suspend one or both of a first PDU session and a second PDU session. The first PDU session and the second PDU session are PDU sessions that are established as requested by a same terminal, and are used to transmit a duplicated data packet. According to the method, when a condition for implementing reliable transmission is not met, the core network device can be indicated to suspend the PDU session. In this way, a PDU session does not need to be re-established, and signaling overheads for establishing the PDU session are saved.

Abstract: A random access method includes working, by a user equipment (UE), on a first bandwidth part (BWP), where the first BWP is a currently active BWP, when the UE needs to perform a random access procedure, the UE performs the random access procedure on an initial BWP or on the first BWP, and when the UE receives BWP switching indication information from a network device instructing the UE to use a second BWP when performing the random access procedure on the first BWP, continuing, by the UE, to perform the random access procedure on the first BWP, or stopping, by the UE, performing the random access procedure on the first BWP, and performing the random access procedure on the second BWP.

Abstract: This application provides a communication method and apparatus, and relates to the field of communication technologies, to resolve problems of a long data transmission delay and high signaling overheads. A first access network device receives uplink user plane data from a user equipment in an inactive state, and sends an uplink control plane information element and the uplink user plane data to a second access network device through a same interface. The method is applied to a data transmission process.

Abstract: Embodiments of this application provide a communication processing method. A data volume report reported by a terminal device includes a data volume on one of at least two paths in a radio bearer in a duplication mode, so that signaling overheads in a data volume reporting process of the terminal device can be reduced.

Abstract: Example communication methods and apparatus are described. One example method includes obtaining a first compression dictionary by a compression node. The compression node compresses a first data packet by using a first compression dictionary, and sends a first compressed data packet to the decompression node. The compression node compresses a second data packet by using the first compression dictionary, and sends a second compressed data packet to the decompression node.

Abstract: This application provides a data transmission method and apparatus. A terminal: receives a first uplink grant from a network device; sends first uplink data in to-be-sent data to the network device by using the first uplink grant; receives a second uplink grant from the network device; and sends second uplink data to the network device by using the second uplink grant, where the second uplink data is at least a part of uplink data in the to-be-sent data except the first uplink data, where the terminal is in a first state, and where the first state includes an idle state or an inactive state. The embodiments of this application help reduce a latency in a data transmission process.

Abstract: A method and an apparatus may be applied to a network slice architecture. The method includes: a terminal sends, to an access network device, first data and indication information used to indicate a first slice corresponding to the first data, and the access network device may determine, based on a mapping relationship between a slice and a tunnel, a first tunnel corresponding to the first slice. In other words, different slices may correspond to different tunnels, that is, data corresponding to different slices may be transmitted through different tunnels. In this way, the access network device can reduce congestion caused because data is simultaneously transmitted through a same tunnel for communication, thereby helping improve communication efficiency.

Abstract: This application provides a reflective QoS flow characteristic-based communications method and apparatus. In the method, an access-network network element sends first information to a core-network network element, where the first information is used to indicate whether a data packet has a reflective QoS flow characteristic; and the access-network network element determines, based on the first information, whether there is a need to send a QoS flow identifier to a terminal. In this way, signaling overheads are reduced.

Abstract: This application provides a random access method and a communication apparatus. The method includes: receiving, by a terminal device, a response message from a network device; determining, by the terminal device, a message format of the response message, where the message format includes a first format or a second format; and parsing, by the terminal device, the response message based on the determined message format, where the response message in the first format includes a contention resolution identity and a control plane message; and the response message in the second format includes a contention resolution identity and includes no control plane message. A two-step random access method provided in this application includes two message formats of a random access response.

Abstract: This application provides a communications method and apparatus. The method includes: obtaining, by a media access control (MAC) entity, M radio link control (RLC) protocol data units PDUs, where M is an integer greater than or equal to 2; and generating, by the MAC entity, N media access control MAC protocol data units (PDUs) based on a logical channel corresponding to each of the M RLC PDUs, where any two RLC PDUs corresponding to a same logical channel and having consecutive RLC sequence numbers are carried in different MAC PDUs, and N is an integer greater than or equal to 2. Consecutive RLC PDUs are placed into different MAC PDUs, so that a continuous packet loss of a same service can be avoided, and transmission reliability can be improved.