An information transmission method and an information transmission device in IAB node group switching, and a network device are provided. The method includes receiving first information transmitted by a source CU, the source CU being a CU for a donor in a source path for a migrating node. The first information includes at least one of topological information or context information, the topological information includes a connection relationship between the migrating node and a descendant node of the migrating node, the context information includes at least one of node context information or context information of a UE, the node context information includes at least one of context information of the migrating node or context information of the descendant node of the migrating node, and the UE includes at least one of a UE connected to the migrating node or a UE connected to the descendant node of the migrating node. According to the present disclosure, it is able to simplify a signaling process for switching the IAB node between the CUs to some extent.

An information transmission method, an information transmission apparatus, an electronic device, and a readable storage medium. The information transmission method includes: determining, by a first centralized unit, resource configuration coordination information; and sending, by the first centralized unit, a first message carrying the resource configuration coordination information to a second centralized unit.

The present disclosure describes methods, systems, and devices for releasing resources for a recovery integrated access backhaul-node (IAB-node) and/or avoiding, from performing radio resource control (RRC) reestablishment procedure, at least one descendant device of a recovery integrated access backhaul-node (IAB-node) from an initial IAB-donor-central unit (CU) to a new IAB-donor-CU. One method includes sending, by the new IAB-donor-CU to the initial IAB-donor-CU, a user equipment (UE) context release information to indicate the resources to be released; and upon receiving the UE context release information, releasing, by the initial IAB-donor-CU, the resources indicated by the UE context release information. Another method includes sending, by the new IAB-donor-CU to the initial IAB-donor-CU, a message. Another method includes sending, by the initial IAB-donor-CU to the at least one descendant device via the new IAB-donor-CU or new IAB-donor-DU, a radio resource control (RRC) message.

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.

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.

A migration apparatus for an IAB (integrated access and backhaul) node, applicable to a first IAB donor node, the first IAB donor node being a source IAB donor node of the first IAB node, includes a receiver configured to receive a feedback message of a first downlink message comprising a first RRC (radio resource control) reconfiguration message, the first downlink message being transmitted from the first IAB node, and a transmitter configured to transmit a second downlink message to a source parent IAB node of the first IAB node, the second downlink message comprising a second RRC reconfiguration message.

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.

A group migration apparatus, configured in a source donor device, includes a first receiver configured to receive a measurement report transmitted by a migrating IAB (integrated access and backhaul) node, a first transmitter configured to transmit a first migration request message to a target donor device, the first migration request message including context information on the migrating IAB node and its served child IAB-node or UE (user equipment), a second receiver configured to receive a first response message transmitted by the target donor device, the first response message including an RRC (radio resource control) reconfiguration message for the migrating IAB node and its served child IAB-node or UE, and a second transmitter configured to transmit the RRC reconfiguration message to the migrating IAB node and its served child IAB-node or UE.

Disclosed are a network connection method under network sharing, an electronic device and a non-transitory storage medium. The network connection method under network sharing is applied to a Distributed Unit (DU) and includes: receiving a RRC connection setup request sent by a UE; acquiring preset configuration information in response to the RRC connection setup request; encapsulating the configuration information in an RRC connection setup message, and sending the RRC connection setup message to the UE; receiving an RRC connection setup complete message sent by the UE according to the RRC connection setup message, where the RRC connection setup complete message carries a PLMN identity; and determining a target CU according to the PLMN identity, and sending an initial UL RRC message to the target CU, so that the target CU establishes a context of the UE according to the initial UL RRC message.

Apparatus, methods, and computer program products for handover of transport blocks (TBs) for network coding are provided. An example method may include receiving, from a user equipment (UE), a transport block (TB) associated with a networking coding request. The example method may further include transmitting, based on at least one of first movement information of the UE, second movement information of one or more recipients of the TB, or a TB load of the first network coding device being above a threshold, a handover request message to a network entity for handover of the TB to a second network coding device. The handover request message may be for a handover of the TB to a second network coding device.