Abstract: A first terminal device has first data to be transmitted on a sidelink and has second data to be transmitted on an uplink. The first terminal device performs medium access control MAC protocol data unit PDU assembly on the first data or does not perform MAC PDU assembly on the first data based on a result of comparison between a transmission priority of the first data and a transmission priority of the second data.

Abstract: This application provides a radio scheduling method and apparatus. The radio scheduling method includes: receiving, by a terminal, a first message from a network device, where the first message indicates at least one index, each of the at least one index associated to an uplink grant resource corresponding to a logical channel; obtaining, by the terminal, a first uplink grant resource from the network device; determining, by the terminal, a first logical channel based on an index of the first uplink grant resource and the at least one index, wherein the at least one index comprises the index of the first uplink grant resource. The radio scheduling method in embodiments of this application helps ensure that the terminal selects an appropriate logical channel, thereby helping satisfy reliability requirements of different services.

Abstract: A communication system, comprising: a radio access network (RAN) node and a core network (CN) node, where the CN node is configure to send a first network slice management request message to the RAN node, wherein the first network slice management request message comprises a network slice identifier corresponding to a network slice allowed to be accessed by a terminal device; and where the RAN node is configured to send a first network slice management request reply message to the CN node.

Abstract: A data integrity protection method and apparatus in a network environment are described. A terminal device obtains an integrity protection algorithm and a key corresponding to a session or a flow, and a DRB corresponding to the session. The terminal device performs, by using the integrity protection algorithm and the key corresponding to the session, integrity protection on data of the DRB corresponding to the session or the flow, where one session includes a plurality of flows. Different integrity protection algorithms and keys can be used for different sessions, and different integrity protection algorithms and keys can also be used for different flows. In this way, integrity protection is more flexible and meets security requirements of a same user for different services.

Abstract: The present disclosure relates to network slice configuration methods and apparatus. One example method includes determining, by a first network device, network slice configuration information, and sending, by the first network device, the network slice configuration information to a second network device, where the network slice configuration information instructs the second network device to perform network slice configuration based on the network slice configuration information.

Abstract: Various embodiments provides a data transmission method and an apparatus. In those embodiments, at least two frequency domain resources are configured for transmission of a connection resumption request, a connection establishment request, or a connection reestablishment request, and the connection resumption request, the connection establishment request, or the connection reestablishment request is sent by using the at least two frequency domain resources.

Abstract: A data transmission method includes: receiving an uplink grant message from a network device, where the uplink grant message includes first information, and the first information corresponds to a plurality of transport block sizes; determining the plurality of transport block sizes based on the first information; determining, based on a size of to-be-sent data, a first transport block size from the plurality of transport block sizes; and sending the to-be-sent data to the network device based on the first transport block size.

Abstract: This application provides communication methods, devices, and systems for improving communication efficiency. One communication method includes: receiving, by a target access network device and from a source access network device, a handover request message sent by a source access network device, wherein the handover request message is used to for requesting to hand over a terminal device from the source access network device to the target access network device; and obtaining, by the target access network device, network slice selection assistance information supported by the terminal device, wherein the network slice selection assistance information supported by the terminal device is used to indicates a network slice supported by the terminal device.

Abstract: The present disclosure relates to network slice configuration methods and apparatus. One example method includes determining, by a first network device, network slice configuration information, and sending, by the first network device, the network slice configuration information to a second network device, where the network slice configuration information instructs the second network device to perform network slice configuration based on the network slice configuration information.

Abstract: This application provides a communication method and a communications apparatus. The method includes: receiving, by a terminal device, a configuration message from a network device, where the configuration message is used to configure a plurality of uplink BWPs and a plurality of downlink BWPs; determining, by the terminal device, a first BWP in the plurality of uplink BWPs, where the first BWP is used to transmit feedback information of downlink information that is on a second BWP, and the second BWP is any one of the plurality of downlink BWPs; receiving, by the terminal device, the downlink information on the second BWP; and sending, by the terminal device, the feedback information of the downlink information by using the first BWP, so that a BWP on which the feedback information is sent can be determined in a scenario in which a plurality of BWPs are activated.

Abstract: Embodiments of this application disclose a cell access method and a device, to provide a network slice service area identifier and network slice configuration information for a terminal device, so that the terminal device accesses a target cell.

Abstract: Various embodiments provide a resource allocation method and an apparatus. In those embodiments, a terminal device obtains a first parameter indicating a maximum service data volume to be provided by an access network device for a first service in a first time length; and determines, based on the maximum service data volume, a resource of a media access control protocol data unit MAC PDU, the resource being occupied by buffered data of the first service. In those embodiments, the terminal device determines, based on the maximum service data volume of the first service, the resource of the MAC PDU. Compared with a conventional method, the maximum service data volume of the first service is considered. This helps improve reasonableness of allocating the resource of the MAC PDU to the data of the first service.

Abstract: A resource allocation method, a terminal and an apparatus are provided. A terminal receives an uplink scheduling grant indicating an uplink resource corresponding to a first radio interface technology from an access network device; selects a logical channel set from logical channels of a terminal, where the logical channel set is a set of logical channels on which to-be-sent data exists and that correspond to the first radio interface technology, and the first radio interface technology is one of at least one radio interface technology, or a radio interface technology specified by the access network device in the at least one radio interface technology; and maps, based on a priority and a prioritized bit rate that are of each logical channel in the logical channel set and corresponding to the first radio interface technology, to-be-sent data corresponding to the logical channel set onto the uplink resource.

Abstract: This application provides a data transmission method and apparatus, and a system, to reduce outdated information sent by a terminal to a network device, thereby reducing improper scheduling decisions made by the network device. The method includes: sending a first data packet to a network device, and storing the first data packet; receiving a first uplink grant from the network device, and skipping using the first uplink grant to perform uplink transmission; receiving a second uplink grant from the network device, where the second uplink grant is a grant for retransmission and generated due to a failure of transmission on the first uplink grant; and ignoring the second uplink grant, or transmitting a second data packet to the network device based on the second uplink grant.

Abstract: This application provides a communication method, a communications apparatus, and a system, to reduce a transmission delay of an emergency service. The method may include receiving an uplink grant. The method may also include determining, based on a time-domain position of an uplink grant resource indicated by the uplink grant, a first uplink grant resource used to transmit first service data. Furthermore, the method may include transmitting the first service data on the first uplink grant resource.

Abstract: The present disclosure relates to communication methods and communications apparatus. One example method includes receiving a first message that is sent by a terminal through an access network device and that includes a first identifier, where the first identifier is used to indicate a message type of the first message, and the message type corresponds to a control plane entity type, and determining the control plane entity type to receive the first message based on the first identifier.

Abstract: Embodiments of this application provide a security protection method and apparatus, and an access network device, and relate to the field of communications technologies, to resolve a problem that user plane security protection cannot be enabled as required in the prior art. The method includes: receiving, by a first access network device, a first message from a second access network device, where the first message carries a user plane security policy, and the user plane security policy is used to indicate a type of user plane security protection to be enabled by the first access network device; and then determining, by the first access network device based on the user plane security policy, a user plane security algorithm and a user plane key corresponding to the user plane security algorithm.

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: Disclosed herein are methods, systems, and apparatus for wireless communications. One of the systems includes: a non-transitory computer-readable memory comprising computer-executable instructions; and at least one processor in communication with the memory, wherein the computer-executable instructions instruct the at least one processor to perform operations comprising: sending, to a core network node, a first message comprising identification information of a network slice supported by a second access network node; and receiving, from the core network node, a first response message responsive to the first message.

Abstract: A communication method, a communications apparatus, and a device are described. The communication operation carried out by a terminal includes receiving BWP indication information sent by a network device. The BWP indication information instructs the terminal to activate a BWP and/or deactivate a BWP. The communication operation further includes sending BWP feedback information to the base station. The BWP feedback information indicates that the terminal successfully received the BWP indication information. In this way, in the event of a data transmission failure because the UE cannot receive or cannot correctly parse the BWP indication information, the UE and the base station communicating by using different BWPs can be avoided, thereby improving communication quality.