Abstract: Data transmitting/receiving apparatuses and methods and a communication system. The data transmitting method includes: in an inactive state, determining whether to maintain in the inactive state or enter an active state according to indication information of a network device or one or more parameters configured by the network device; and in the inactive state, transmitting data and/or a request message for entering the active state to the network device. Hence, data transmission may be performed in an appropriate state, without needing to restart connection at each time of data transmission; saved resources may be used for the data transmission, and time needed in performing identical data transmission may be reduced.

Abstract: In accordance with an embodiment, a communication method applied to a first node includes: receiving first information from a second node, wherein the first information comprises an available space size in a first buffer space of the second node, the first buffer space is for buffering a data packet that is to be transmitted through a first path, the first path is a primary path for transmitting the data packet, and the second node is a next-hop node of the first node on the primary path; and in response to the available space size in the first buffer space being less than or equal to a first threshold, determining to transmit the data packet through a third node, wherein the third node is a next-hop node of the first node on a backup path for transmitting the data packet.

Abstract: The present disclosure relates to methods applied to an integrated access and backhaul (IAB) node. An example method includes receiving configuration information for setup of a distributed unit (DU) part of the IAB node and determining, based on a manner of receiving the configuration information, that a master node of the IAB node or a secondary node of the IAB node is a donor node of the IAB node.

Abstract: A downlink data transmission method and apparatus and a communication system. The method includes: an anchor eNB determines a non-anchor eNB which is required to schedule downlink data of an UE according to a paging area information of the UE when the downlink data of the UE arrives; and the anchor eNB transmits a paging message to the non-anchor eNB, the paging message including a context of the UE and a data packet of the downlink data, so that the non-anchor eNB schedules the downlink data of UE according to the context of the UE. With the embodiments of this disclosure, a time for state transition from an idle state to a connected state for the UE is shortened, and control plane delay is reduced.

Abstract: Embodiments of this application disclose a communication method, apparatus, and system. The method is applied to a radio access network RAN management network element which is connected to a first integrated access and backhaul IAB donor through a first interface. The first IAB donor is connected to a first IAB node through a wireless backhaul link. The method includes: determining configuration information of the first IAB donor and/or the first IAB node, where the configuration information includes one or more of address information, routing information, and cell information; and sending the configuration information to the first IAB donor. In embodiments of this application, the RAN management network element may simultaneously manage address configurations, routing configurations, and cell configurations of a plurality of IAB donors and IAB nodes in a management range of the plurality of donors.

Abstract: A communication method and a communication device. A first donor node generates a first data packet, where the first data packet further includes first information. The first information indicates a donor node to which a destination node of the first data packet belongs, or indicates a network segment to which a destination node of the first data packet belongs, or indicates whether a network segment to which a destination node of the first data packet belongs is a network segment controlled by the first donor node. The first donor node sends the first data packet to the destination node first node.

Abstract: This application provides an information transmission method and an apparatus. The method includes: A first IAB donor CU determines a type of signaling and/or first QoS information of data, where the first QoS information is used to determine transmission of the data in a second network topology managed by a second IAB donor CU, and the signaling type is used to determine transmission of the signaling in the second network topology; and the first IAB donor CU sends the first QoS information and/or indication information of the signaling type to the second IAB donor CU.

Abstract: This application provides a communication method. In the method, a first node receives a first radio resource control (RRC) reconfiguration message from a first donor node through a second node. After the first node receives the first RRC reconfiguration message from the second node, the first node receives first indication information from the second node. When the first node determines, based on the first indication information, that the first RRC reconfiguration message becomes effective, the first node establishes an RRC connection to a second donor node based on the first RRC reconfiguration message. In the method, the first node and the second node are nodes in a group that performs group handover, the group handover is a cross-donor node group handover, the second node is a head node or the second node is connected to a head node, and the second node is a parent node of the first node.

Abstract: In a communication system, a first central unit (CU) of a first donor node determines a first mapping that comprises a route mapping or a bearer mapping. The route mapping is between the downlink data and a downlink transmission path. The bearer mapping is between the downlink data and a downlink transmission bearer. The downlink transmission path includes a transmission path between the first CU and a target node of the downlink data through a second DU of a second donor node. The downlink transmission bearer includes a RLC channel between the second DU and a next-hop node of the second DU. The first CU then sends the first mapping to a second CU of the second donor node, and sends downlink data to the second DU of the second donor node.

Abstract: The technology of this application relates to a communication method and apparatus. The method includes receiving first resource configuration information from a target donor node, determining third resource configuration information based on the first resource configuration information and sending the third resource configuration information to a first node. The first resource configuration information includes current resource configuration information of a target cell, the target cell is a cell served by a target parent node, and the target parent node is used by the first node to connect to the target donor node. The third resource configuration information is used for resource configuration of a first cell, and the first cell is a cell served by the first node.

Abstract: Embodiments of this application relates to a communication method and a related device. In an example, a device receives a first data packet in a first network segment, the first data packet comprises a first backhaul adaptation protocol (BAP) routing identity, and the first BAP routing identity is used for transmission of the first data packet in the first network segment. The device further obtains a first correspondence. In response to determining that the first correspondence comprises the first BAP routing identity in the first data packet, the device determines that the first data packet meets a preset condition. In response to that the first data packet meets the preset condition, the device replaces the first BAP routing identity in the first data packet with a second BAP routing identity according to the first correspondence, to obtain a second data packet.

Abstract: A terminal apparatus includes a receiver configured to receive a command for activating or deactivating one or more duplication transmission by using a bitmap field, each the one or more duplication transmission corresponding to each of one or more packet data convergence protocol (PDCP) entities or each of one or more radio bearers, and a processor circuitry configured to control to activate or deactivate the one or more duplication transmission according to the command, and wherein one bit or a plurality of bits in the bitmap field correspond(s) to one of the PDCP entities or the radio bearers, an i-th bit or an i-th pair of bits in the bitmap field correspond(s) to an i-th packet data convergence protocol entity in the PDCP entities.

Abstract: A method includes: a first IAB node sets up a first RRC connection to a target IAB donor by performing RLF recovery. The first IAB node sends a first message to a second node by using an SRB 1 or an SRB 2 or the first IAB node sends a BH RLF indication to the second node. t The first IAB node sets up an RRC connection to a target IAB donor by performing RLF recovery and the second node is connected to a source IAB donor through the first IAB node. The second node may be triggered to set up an second RRC connection to the target IAB donor based on the first message or the BH RLF indication.

Abstract: This application discloses a routing method and an apparatus. The method and the apparatus may be used in a multi-hop communication scenario, and may also be used in another scenario. Particularly, the method and the apparatus are used for implementing routing between an AN device and remote UE in the multi-hop communication scenario. In the method, a relay terminal on a communication link may determine a transmission object by using route indication information of a data packet, or the route indication information and a target device identifier that are of the data packet, to transmit data carried in the data packet to the transmission object. In the method, routing transmission of the data packet may be guided by using route guide information, to ensure that the routing between the AN device and the remote UE can be implemented in the multi-hop communication scenario.

Abstract: A method for releasing an F1 connection is used for an IAB node. The method includes: receiving a first message from a source IAB donor node, where the first message indicates that a central unit CU of an IAB donor node connected to the IAB node changes; and releasing an F1 connection to a CU of the source IAB donor node according to the first message. Therefore, the IAB node can release the F1 connection in time based on an indication of the source IAB donor.

Abstract: Embodiments of this application provide communication method and related devices. In an example method, a first IAB-donor-central unit (CU) determines a quality of service (QoS) attribute corresponding to an F1 application protocol (F1AP) message, where an F1 interface is a communication interface between the first IAB-donor-CU and a distributed unit (DU) of an IAB-node. Then, the first IAB-donor-CU sends the F1AP message and the QoS attribute corresponding to the F1AP message to a second IAB-donor-DU.

Abstract: In a method, an IAB donor obtains configuration information of a backhaul radio link control channel BH RLC CH, where the configuration information of the BH RLC CH is configuration information of a BH RLC CH between a first integrated access and backhaul IAB node and a source parent node of the first IAB node. Then, the IAB donor sends the configuration information of the BH RLC CH to a target parent node of the first IAB node.

Abstract: A command indication method and apparatus and information interaction method and apparatus. The command indication method includes: transmitting to a user equipment (UE), a command for activating or deactivating duplication transmission by using a bitmap field, to activate or deactivate duplication transmission of one or more packet data convergence protocol entities or radio bearers in the UE. Hence, activation or deactivation may be performed on the duplication transmission mode of one or more PDCP entities in the user equipment.

Abstract: Embodiments of this application provide a lossless data transmission communication method, apparatus, and system. The method includes: A first network node determines a first data packet. A destination node of the first data packet is a third network node or a security gateway on the third network node side. The third network node is a source donor node or a source donor node central unit (CU) of the first network node. The first network node sends the first data packet to a second network node. The second network node is a target donor node distributed unit DU of the first network node. According to the method, a data packet loss in a topology update process of the first network node can be avoided, and service continuity can be ensured.

Abstract: A communication method and a related device include in response to a first node determining that an RLF occurs on a radio link between the first node and a second node, and there is no other available path between the first node and a destination node, the first node sends first indication information to a third node. The first indication information indicates the RLF or indicates that a link recovery attempt is being made. The second node is a parent node of the first node, and the third node is a child node of the first node; or the second node is a child node of the first node, and the third node is a parent node of the first node, or a donor node connected to the first node.