Abstract: An integrated access and backhaul (IAB) node switching method, including: receiving, by a third IAB node, a node switching command from a source donor node, where the node switching command is used to indicate a parent node of the third IAB node to switch to a second node, the source donor node is a control node of the third IAB node, the first node is a source parent node of the third IAB node, the first node is a donor node or another IAB node, and the second node is a donor node or another IAB node; and switching, by the third IAB node, to the second node, and sending, by the third IAB node, first indication information to a child node of the third IAB node, where the first indication information indicates the child node to interrupt transmission with the third IAB node.

Abstract: Embodiments of the present invention disclose a communication method and a related product. A method implemented on an access network side includes: sending, by an access network device, indication information to user equipment, where the indication information is used to indicate a manner of receiving multicast service data, and the receiving manner includes a unicast manner and/or a multicast manner; and sending, by the access network device, the multicast service data in the unicast manner and/or the multicast manner indicated by the indication information.

Abstract: A communication method and apparatus, and a computer-readable storage medium are provided. A first access network device sends, to a first relay device, first indication information indicating whether access of a mobile relay device is allowed. When the first relay device is a mobile relay device, the first relay device sends an access request to a second access network device that allows access of a mobile relay device, so that a mobile relay device initiates an access request to an access network device that allows access of a mobile relay device, ensuring normal access of the mobile relay device.

Abstract: A multicast service transmission method includes: a management device that receives a first message; the management device based on the first message, instructs a gateway device to send a data packet of the first multicast service to the terminal device or the access network device, or the management device instructs a gateway device to stop sending a data packet of the first multicast service to the terminal device or the access network device.

Abstract: A time domain resource format configuration method is provided. In addition to configuring time domain resources for an integrated access and backhaul (IAB) node based on a downlink-flexible-uplink time domain resource format, an IAB donor may further configure time domain resources for the IAB node based on an uplink-flexible-downlink time domain resource format, so that the time domain resources can be flexibly configured for the IAB node, to improve utilization and a throughput of the time domain resources in an IAB network.

Abstract: A communication method and apparatus are provided. The method includes: An IAB donor gNodeB determines first indication information, and then sends a first message to an eNB, where the first message includes a first control plane message and the first indication message; and the eNB may determine a first radio bearer based on the first indication information in the received first message, and then sends a second message including the first control plane message to an IAB node by using the first radio bearer. The first radio bearer corresponds to a type of a downlink F1AP message, so that the eNB selects different radio bearers for different types of downlink F1AP messages, thereby providing an effective QoS guarantee for a service of a terminal.

Abstract: Example communication methods, apparatus, storage media are described. In one example method, a first node obtains a backhaul adaptation protocol (BAP) routing identifier of a data packet and a topology type indicator of a topology that the data packet needs to pass through. The first node determines a source internet protocol (IP) address based on the BAP routing identifier, the topology type indicator, and a correspondence between a topology type and an IP address.

Abstract: A data packet transmission method and apparatus are provided. The method includes: An IAB donor determines first configuration information, where the first configuration information is used to indicate a first backhaul link BH RLC channel, and the first BH RLC channel is used to transmit a control protocol data unit PDU at a backhaul adaptation protocol BAP layer. The IAB donor sends the first configuration information to an IAB node. According to the foregoing procedure, the IAB donor indicates, by using the first configuration information, the IAB node to send the control PDU at the BAP layer through the first BH RLC channel, to implement bearer mapping when the IAB node needs to send the control PDU at the BAP layer.

Abstract: This disclosure provides communications methods and apparatuses. One method comprises: receiving, by a first entity of an adaptation layer in a network node, a data packet sent by an entity of a lower protocol layer of the adaptation layer, wherein the data packet comprising an adaptation layer header and an adaptation layer payload; and processing the data packet in response to determining whether the network node is a destination node that the data packet is routed to at the adaptation layer.

Abstract: Embodiments of this application provide example communication methods and example devices. One example method includes sending information to a first node, where the information includes at least one of information about a first group of logical channel identities (LCIDs) or information about a second group of LCIDs, the first group of LCIDs includes an LCID used for access traffic, and the second group of LCIDs includes an LCID used for backhaul traffic. Another information can then be sent to the first node, where the another information is used to configure a radio link control (RLC) bearer of the first node, the RLC bearer includes a RLC layer entity and a logical channel, and when an LCID corresponding to the logical channel belongs to the first group of LCIDs, an upper protocol layer of a RLC layer is a packet data convergence protocol (PDCP) layer or an F1 interface protocol layer.

Abstract: Example mapping methods and apparatus are described. One example method includes determining a message type of an uplink signaling message by an integrated access and backhaul node. The integrated access and backhaul node maps the uplink signaling message to a corresponding backhaul radio link control (BH RLC) based on an uplink mapping relationship from an integrated access and backhaul donor centralized unit and the message type. The uplink signaling message is sent to a parent node of the integrated access and backhaul node.

Abstract: The present disclosure discloses example downlink buffer status feedback methods and apparatuses. One example method includes determining first information by a first node, where the first information indicates a downlink buffer status of a first bearer between the first node and a parent node of the first node. The first information is sent by the first node to a second node, where the first node is a relay node in a wireless relay communications system, and the second node is a parent node of the first node.

Abstract: Embodiments of the present invention disclose a communication method and a related product. A method implemented on an access network side includes: sending, by an access network device, indication information to user equipment, where the indication information is used to indicate a manner of receiving multicast service data, and the receiving manner includes a unicast manner and/or a multicast manner; and sending, by the access network device, the multicast service data in the unicast manner and/or the multicast manner indicated by the indication information.

Abstract: This application provides a method of determining an association between logical channel groups, including: The first backhaul node receives a first buffer status report from a first device, where the first buffer status report is used to determine uplink buffer statuses of one or more first logical channel groups of a MAC entity corresponding to the first backhaul node and the first device. The first backhaul node determines, based on the first logical channel group(s) and a first mapping relationship, one or more second logical channel groups associated with the first logical channel group(s), where a second device is a parent node of the first backhaul node, and the first mapping relationship includes a mapping relationship between the first logical channel group(s) and the second logical channel group(s) of a MAC entity corresponding to the first backhaul node and the second device.

Abstract: This application provides a data transmission method and an apparatus. The method includes that an integrated access and backhaul (IAB) donor distributed unit receives downlink data and service attribute information of downlink data that are sent by an IAB donor centralized unit. The IAB donor distributed unit maps the downlink data to a corresponding backhaul radio link control channel (BH RLC) channel based on the service attribute information of the downlink data or based on the service attribute information of the downlink data and access IAB node address information of the downlink data, and sends the downlink data to a next-hop IAB node.

Abstract: Embodiments of this application provide a communication method and apparatus, and a storage medium. The communication method includes: determining a target buffer status report (BSR) format based on a result of comparison between a first identifier and a first value, where the first identifier is a largest logical channel group (LCG) identifier in LCG identifiers of LCGs having buffered data; and generating a BSR based on the target BSR format. Uplink transmission resources can be properly used to report a BSR.

Abstract: The present disclosure provides communications methods and apparatuses. One method includes: receiving, by a first communication node, first indication information from a second integrated access and backhaul (IAB) node, wherein the first indication information indicates that a radio link failure (RLF) occurs on a backhaul (BH) link on a first communication path between the first communication node and a second communication node, wherein the first communication node is a terminal device or a first IAB node, and wherein the second IAB node is on the first communication path, and reporting, by the first communication node, second indication information through a second communication path between the first communication node and the second communication node, wherein the second indication information indicates that the RLF occurs on the BH link on the first communication path.

Abstract: This application provides an IAB network includes a first BAP topology and a second BAP topology, the first BAP topology is managed by a first donor node, the second BAP topology is managed by a second donor node. In the IAB network, a first IAB node receives a first data packet, where the first IAB node is managed by the first donor node, at least one parent node of the first LAB node is managed by the second donor node, and the first IAB node belongs to the first BAP topology. The first IAB node processes the first data packet based on a BAP topology corresponding to an ingress link for receiving the first data packet.

Abstract: This application provides a key determining method, and a communication apparatus. The method is applied to a donor node central unit which contains a control plane entity and a user plane entity, and the method includes: deriving a first key based on a root key, an internet protocol (IP) address of a distributed unit of an integrated access and backhaul node, and a first IP address of the user plane entity; and sending a first message to the user plane entity, wherein the first message comprises the first key. According to this application, a user plane secure transmission channel may be established between the user plane entity and the distributed unit based on the first key.

Abstract: This application provides a communication method, apparatus, and system. The communication method includes: A first access network device (an indoor base station) obtains first information, and then sends the first information to a core network device through a control plane of a next generation (NG) interface or a general packet radio service tunnelling protocol for the user plane (GTP-U) tunnel between the first access network device and the core network device. The first information transmitted on the control plane of the NG interface or the GTP-U tunnel needs to pass through a route of a second access network device (an outdoor base station). According to this method, the indoor base station may perform NG interface-based communication with the core network device via the outdoor base station, to provide a better home network service.