A UE may perform a location-based conditional handover (CHO) based on a region information and size parameter associated with a serving cell of a non-terrestrial network (NTN). In time-based CHO, the UE may perform CHO in response to expiration of a network-configured wait time. Alternatively, the UE may perform CHO by randomly selecting a wait time from a network configured time range. The selection may be randomized using a network provided seed or using a cell Radio Network Temporary Identifier (RNTI) value. In elevation-based CHO, the UE may perform CHO in response to the elevation angle of a satellite being less than a network configured threshold. When the UE is configured with multiple cells of the NTN, and the CHO criteria for two or more of the cells are satisfied, the UE may select a target cell for CHO based on network indicated prioritization of the cells.

The present application relates to devices and components including apparatus, systems, and methods to provide positional information for one or more NTN devices to a UE to be utilized for one or more UE operations.

A mobile wireless communication device provides information to a communication infrastructure. In response to the information, a serving base station of the mobile wireless communication device sends a transition instruction to the mobile wireless communication device indicating the mobile wireless communication device is authorized to perform a transition procedure from the serving base station to any one of a group of base stations. The transition instruction authorizes the mobile wireless communication device to perform the transition procedure in response to a trigger and without transmitting any measurement reports. In response to determining the trigger has occurred and without transmitting a measurement report, the mobile wireless communication device transitions from receiving communication service from the serving base station to receiving communication service from a target base station of the group of base stations.

A method and system for controlling uplink-path switching of a user equipment device (UE) when the UE has at least two co-existing air-interface connections including a first air-interface connection with a first access node and a second air-interface connection with a second access node, and where one of the first and second air-interface connections defines a primary uplink path of the UE. An example method includes (i) predicting that a handover trigger for handover of the UE from the first access node to a third access node will occur and (ii) responsive to at least the prediction that the handover trigger will occur, but before the handover trigger occurs, forgoing application of at least a portion of an uplink-path-switch control process for dynamically controlling which of the UE's connections will be set as the UE's primary uplink path.

A Machine-to-machine (M2M) terminal (11) comprises a radio communication unit (111) and a controller (112). The radio communication unit (111) is configured to communicate with a base station (13). The controller (112) is configured to change at least one of a cell selection operation, a cell reselection operation, and a handover operation according to whether a specific coverage enhancement processing is required or according to whether the specific coverage enhancement processing is supported by at least one of a cell (13) in which the M2M terminal (11) camps on and a neighbouring cell (14) of the cell (13) which the M2M terminal (11) camps on. It is thus possible to provide an improved technique for allowing the M2M terminal that is supporting a special coverage enhancement processing for M2M terminals to camp on an appropriate cell.

A train control system enabling a train to smoothly travel while performing handover. The system includes an on-vehicle wireless station mounted on a train following a preceding train and connected to an on-vehicle control device of the train, ground wireless base stations capable of wirelessly communicating with the on-vehicle wireless station, and a base station control device to control the base stations. The ground wireless base station is located between the ground wireless base station with which the on-vehicle wireless station is communicating and the ground wireless base station forming a communication area including a travelling permission point determined by a position of the train. The base station control device reserves radio resources of the ground wireless base stations while communicating with the ground wireless base station.

We disclose various embodiments of methods and apparatus for processing handovers of mobile terminals between base stations of a wireless communication system. An example handover algorithm used for this purpose enables the handover threshold to be increased for some mobile terminals, on a terminal-by-terminal basis, thereby individually expanding the range of the serving cell for each of such terminals. In an example embodiment, the handover-threshold determination is carried out based on physical-resource-block usage of the target cell. The extent of the cell-range expansion depends on whether or not the reference signals of the serving and target cells interfere with each other. Embodiments of the disclosed handover algorithm can advantageously reduce the number of failed handovers by allowing some communication sessions to run to completion before a handover is triggered.

Methods and systems for preventing or delaying handovers to target access nodes that are not configured to provide uplink split mode, include determining that an uplink usage requirement or a power headroom of a wireless device meets a threshold, and preventing handovers of the wireless device to access nodes that are not capable of utilizing uplink split mode. Access nodes capable of utilizing uplink split mode are configured to receive uplink data via at least two different radio access technologies simultaneously, including 4G LTE and 5G NR.

A system configured to analyze cellular connectivity information for at least one wireless network and at least one wireless device includes a processor configured to receive cellular connectivity information from at least one wireless network for at least one wireless device; the processor further configured to receive geographic location information from the at least one wireless network for the at least one wireless device. The system also includes a database configured to store the cellular connectivity information, the geographic location information, and equipment type information related to the at least one wireless device. The processor further configured to analyze the cellular connectivity information and determine a wireless device having poor wireless service performance based on the analysis of the cellular connectivity information. The disclosure additionally includes a process to analyze cellular connectivity information for at least one wireless network and at least one wireless device.

A method includes communicating with a remote device using a first access node of an access network; determining, by a centralized stack node of the access network, that a quality of a first wireless communication link between the remote device and the first access node is below a threshold; identifying a second access node in the access network for which a quality of a second wireless communication link between the remote device and the second access node is above the threshold; responsive to identifying the second access node, updating, by a centralized controller of the stack node, an access node identifier associated with a connection with the remote device to be an identifier for the second access node; and communicating with the remote device using the second access node.