According to some embodiments, a network node is capable of operating as an integrated access and backhaul (IAB) node comprising a distributed unit (DU) and a mobile termination (MT). The IAB node performs a method comprising: obtaining (2012) configuration information for establishing an interface between the IAB node DU and a target IAB donor central unit (CU); and after a handover of the IAB node to the target donor, establishing (2114) the interface between the IAB node DU and the target IAB donor CU based on the obtained configuration information.

According to some embodiments, a method performed by an integrated access and backhaul (IAB) donor control unit (CU) network node comprises obtaining a first mapping between a first traffic type and a first communication path. The first communication path is for communicating the first traffic type between the IAB donor CU network node and an IAB network node. The method further comprises transmitting the first mapping to the IAB network node.

The present disclosure describes methods, systems, and devices for informing at least one downstream device of a migrating integrated access backhaul node (IAB-node) about an inter-donor migration status of migrating IAB node undergoing a migration from a source IAB-donor to a target IAB-donor. The method includes receiving, by a receiving device, a radio resource control (RRC) message sent from an IAB-donor. The RRC message includes an information element which indicates an inter-donor migration status of a migrating IAB-node. The method further includes in response to the information element indicating a successful inter-donor migration, sending, by the receiving device, a packet data convergence protocol (PDCP) status reports to a target IAB-donor. The PDCP status report corresponds to a radio link control acknowledged mode (RLC-AM) bearer configured to be allowed to send the PDCP status report in an uplink, and is configured to update data transmission for the receiving device.

A method of securing wireless backhaul for a child base station in a first network provided by a first operator, including: any parent base station with wireline backhaul capability and configured to virtualise a core network User Plane Function, UPF, advertises that it supports a wireless backhaul service; the child base station in the first network connects over an air interface to one or more parent base stations in a second network provided by a second operator; the child base station sends a backhaul service request to a connected parent base station; when the backhaul service request is accepted, the connected parent base station uses a virtualised UPF to enable a direct wireline backhaul link between the parent base station and a data network; and the child base station uses the air interface as a wireless backhaul link and the wireline backhaul link of the connected parent base station for backhaul.

A technique includes sending, by a relay node to a candidate base station via a base station-to-base station connection, a request for transmission of reference signals, wherein the base station-to-base station connection includes, at least in part, a wireless connection; receiving, by the relay node from the candidate base station, a reference signal configuration; and measuring one or more signal parameters of one or more received reference signals based on the received reference signal configuration.

A method of requesting a relay resource, a scheduling method and a device are provided. The method of requesting a relay resource includes: sending a resource request message to a network device to which a relay device accesses; the resource request message carries at least one of following resource requirements information: backhaul resource requirement information of the relay device, and access link resource requirement information of the relay device.

Provided is a system including: a first vehicle equipped with a land mobile station for mobile communication; and a second vehicle that transports the first vehicle and a user holding a terminal for mobile communication. The system further includes a control unit configured to acquire radio wave intensity of the mobile communication at a current location of the second vehicle, and generate, when the acquired radio wave intensity is less than a predetermined intensity, a command to unload the first vehicle from the second vehicle; and generating a command to relay the mobile communication by the land mobile station of the first vehicle.

A method, apparatus, and computer program product provide for controlling access attempts for wireless backhaul. In the context of a method, the method constructs an access request comprising an Integrated Access and Backhaul (IAB) access indication. The method further determines whether the access attempt is allowed for a particular cell, and if so, determines an establishment cause value based at least on the IAB access indication. The method also causes transmission of the access request and establishment cause value.

Methods and apparatuses are provided for transmitting/receiving a reference signal for sidelink channel state information acquisition. In particular, a method of a transmitter UE is provided for transmitting a reference signal in order to acquire sidelink channel state information. The method may include: receiving enabling information of sidelink channel state information (CSI) reporting, determining whether to transmit a sidelink channel state information reference signal (SL CSI-RS) based on the enabling information of the CSI reporting, and transmitting the SL CSI-RS within a resource assigned for physical sidelink shared channel (PSSCH) transmission to the a receiver UE.

The present disclosure relates to cell selection in wireless communications. According to various embodiments, a method performed by a wireless device in a wireless communication system comprises: receiving, from each of a plurality of mobile cells, location information related to each of the plurality of mobile cells and identifier (ID) information related to each of the plurality of mobile cells; estimating a movement pattern of each of the plurality of mobile cells based on the location information and the identifier information; determining a mobile cell among the plurality of mobile cells for a cell selection based on the movement pattern; and performing the cell selection to the determined mobile cell.