Apparatuses, methods, and systems are disclosed for selecting a base unit in response to a handover condition being triggered. One method (1000) includes selecting (1002) a base unit of multiple base units for handover in response to at least one base unit of the multiple base units triggering a handover condition. The method (1000) includes transmitting (1004) a random access preamble to the base unit. The method (1000) includes performing (1006) a reestablishment procedure to establish communication with one base unit of the multiple base units in response to determining an inability to access each base unit of the multiple base units that meets the handover condition.

An embodiment of the present disclosure may provide an inter-MeNB handover method in a small cell system, including: making, by a source MeNB and/or target MeNB, a determination as to whether to maintain a SeNB when handover is performed; and triggering different handover processes according to a result of the determination as to whether to maintain the SeNB. Another embodiment of the present disclosure may further provide an inter-MeNB handover device in a small cell system. With the inter-MeNB handover method and device in a small cell system provided by the present disclosure, unnecessary deletion and re-establishment of the bearers at the SeNB for the UE may be reduced. False bearer deletion may be avoided and data forwarding may be reduced. Furthermore, the SeNB may be maintained according to network deployment and SGW re-selection may be supported. Therefore, system capacity and transmission speed of the data may be improved.

A process for determining neighbor tier relationships between cells in a wireless telecommunications network includes establishing a plurality of cell points, each cell point representing a cell of a plurality of cells in the wireless telecommunications network, forming a plurality of triangles, the vertices of each triangle of the plurality of triangles corresponding to respective cell points of the plurality of cell points, removing edges from a portion of the plurality of triangles, determining neighbor tier relationships between the plurality of cells using remaining triangle edges between the plurality of cell points, storing the neighbor tier relationships in a first memory, and using the neighbor tier relationships for handovers between the plurality of cells.

Provisioning and communicating physical signals and channels in NR networks having a first subset of transmit and receive points that use a first cell ID and a second subset of transmit and receive points that use a second cell ID. Operations include transmitting from, and receiving from, a first transmit and receive point a first signal or channel wherein the first signal or channel is based on a first user equipment (UE) specific parameter assigned via the first subset of transmit and receive points and transmitting from, and receiving from, the first transmit and receive point the plurality of transmit and receive points a second signal or channel wherein the second signal or channel is based on a second UE specific parameter assigned via the second subset of transmit and receive points. A transmit and receive point and a UE for implementing the operations are also disclosed.

A first base station receives, from a wireless device, a measurement result of a cell of a second base station, and sends, to the wireless device and based on the measurement result, a command of a conditional handover towards the cell of the second base station. The command comprises at least one handover execution condition comprising at least one of a reference signal received power, a reference signal received quality, a first time value indicating a time offset for a decision of a handover execution, or a second time value indicating a time duration when the command of the conditional handover is valid. The first base station receives, from the wireless device and based on the wireless device determining that at least one criteria of the at least one handover execution condition is met by the cell, a handover execution notification indicating a random access procedure.

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.

A first base station may receive, from a second base station, cell configuration parameters of one or more cells of the second base station. The cell configuration parameters may indicating at least one first information element (IE) indicating a first identifier of a first cell of the one or more cells, at least one second IE indicating that the first cell is an unlicensed cell, and at least one third IE indicating radio frequency channel number of the unlicensed cell. The first base station may send, to the second base station, a handover request message for a wireless device after receiving the cell configuration parameters.

A wireless device receives, via a first cell, a message indicating an activation of one or more transmission configuration indication (TCI) states. The wireless device transmits, in response to the one or more TCI states being associated with a second cell and via the second cell, an uplink transmission based on the one or more TCI states.

A method performed by a User Equipment, UE is provided. The UE receives from a network node, a higher layer configuration comprising a set of SpCell configurations, to be configured in the UE. While being in connected state, the UE receives a lower layer signaling from a network node. The lower layer signaling comprises an indication. The indication indicates one or more SpCells comprised in the set of SpCell configurations, to be any one or more out of: activated or deactivated.

Disclosed are a handover method and apparatus, devices and a storage medium. The method includes: receiving configuration information from a network device, the configuration information including multiple sets of handover configuration information, each set of the multiple sets of handover configuration information being associated with a service situation, and the handover configuration information being used to configure an operation related to cell handover; obtaining a current service situation; determining, from the multiple sets of handover configuration information, target handover configuration information according to the current service situation; and performing the operation related to cell handover according to the target handover configuration information.