Embodiments of this application provide a data transmission method and device. The method includes: obtaining, by a first access network device, a first message from a second access network device, where the first message requests context information of a terminal device; and sending, by the first access network device, a data packet to the second access network device. The first access network device is a corresponding access network device of the terminal device before the re-establishment procedure, and the second access network device is a corresponding access network device when the terminal device initiates the re-establishment procedure.

An operating method of a node in a wireless communication system, and a device using the method are provided. The method transmits a link instability signal notifying a child node of the instability of a link if the link with a parent node is unstable, monitors, during a connection recovery time, whether a link recovery signal is received from the parent node, and transmits, to the child node, a handover trigger signal if the link recovery signal has not been received within the connection recovery time.

A system and methods for performing phased reconfiguration in a wireless communications system are disclosed. A wireless transmit/receive unit (WTRU) may perform a phased reconfiguration from a source cell to a target cell. The WTRU may be connected to the source cell and may execute a first set of functions towards the source cell. The WTRU may monitor for a first set of preconfigured trigger conditions and a second set of preconfigured trigger conditions. The WTRU may commence a second set of functions towards the target cell based on detection of at least one of the first set of preconfigured trigger conditions while continuing to execute the first set of functions towards the source cell. The WTRU may cease to perform at least a subset of the first set of functions towards the source cell based on detection of at least one of the second set of preconfigured trigger conditions.

Embodiments of the present disclosure provide a wireless communication method, a terminal device, and a network device. The method is applied to a CA scenario, and there are at least one primary cell and at least one secondary cell for serving a terminal device. The method comprises: determining, by the terminal device, whether there is a candidate beam that satisfies a first condition among at least one candidate beam when a beam failure occurs in a first secondary cell, wherein the first condition is that at least one of RSRP, RSRQ, and SINR of a signal is greater than a first threshold, and the first secondary cell belongs to the at least one secondary cell; and determining, by the terminal device, whether to perform beam failure recovery for the first secondary cell according to a determination result.

A handover command message can be received. The handover command message can include at least one handover condition. The at least one handover condition can include an indication that handover can occur after at least one beam failure. A handover procedure can be performed based on the at least one handover condition.

A method for allocating beam failure detection resources includes determining control channel resource sets (CORESETs) configured by a network device for a terminal; in response to a number of the CORESETs being greater than a number of beam failure detection (BFD) resources supported by the terminal, selecting target CORESETs with a number of the BFD resources; and determining reference signal (RS) resources corresponding to transmission configuration indication (TCI) states of quasi co-locations (QCLs) of the selected target CORESETs as BFD RS resources. A device having a processor and memory may perform the method.

Apparatuses, systems, and methods for a user equipment device (UE) to perform methods for network assisted side-link resource configuration for unicast and/or multi-cast/groupcast communications in V2X networks. A UE may, after establishing an RRC connection with a base station, transmit, to the base station, V2X connection information. The V2X connection information may include a V2X identifier associated with the UE and a V2X identifier associated with a target UE. The UE may receive, from the base station, a side-link configuration for data transmission with the target UE. The side-link configuration may include a resource allocation defined in time and frequency (e.g., a transmit/receive pool). The UE may communicate with the target UE using the resource allocation included in the side-link configuration.

Embodiments are presented herein of apparatuses, systems, and methods for a user equipment device (UE) and/or cellular network to perform to perform cell detection and measurement, e.g., in new radio (NR) unlicensed (NR-U). The UE may determine that a threshold condition related to missed reference signal opportunities is reached. In response, the UE may modify reference signal monitoring and/or measurement.

A networked electronic system and method are provided. The system includes a hub primary radio being defined within a primary communication path. The primary communication path has an operational state wherein data is transmittable therethrough and a fault state. Communication of data between a device primary radio of an electronic device and the hub primary radio through a primary communication path is monitored such that communication of the data is transferred to a secondary communication path between a device secondary radio of the device and a hub secondary radio in response to detection of a fault state on the primary communication path. The secondary communication path has a different frequency than the primary communication path. The system may be a monitoring system, and the device may be a monitoring device such as an imaging device including a camera.

Apparatuses, systems, and methods for a wireless device to perform detection and mitigation of data stalls. The mitigation may occur during and/or at initiation of a data connection. The wireless device may establish a data connection(s) with a network over a Wi-Fi or cellular interface and monitor the data connection(s) for a data stall condition(s)/hint(s). The wireless device may perform a remedial action(s) responsive to detection of a data stall condition(s)/hint(s), including initiating a service recovery of the cellular interface, initiating a radio access technology (RAT) upgrade procedure, and/or initiating a handover procedure to a neighbor cell.