A time synchronization method, and device are described. The method includes determining a target base station from neighboring base stations of a source base station; determining, based on a preset handover condition and from first user equipments (UEs) connected to the source base station, a to-be-handed-over UE that needs to be handed over to the target base station; triggering the to-be-handed-over UE to be handed over from the source base station to the target base station; and performing time synchronization with the target base station in a handover process of the to-be-handed-over UE. The to-be-handed-over UE is triggered to be handed over to the pre-determined target base station. This implements time synchronization with the target base station, resolves relatively low flexibility of time synchronization between base stations in a related technology, and improves flexibility of time synchronization between the source base station and the target base station.

A method performed in a network node for triggering a performance level re-configuration in a target radio base station, RBS, prior to handover of a wireless device to the target RBS. The method comprises determining if a need for performance level re-configuration of the target RBS exists, and if need for performance level re-configuration of the target RBS exists, transmitting, to the target RBS, a re-configuration alert message, thereby enabling a performance level re-configuration in the target RBS prior to handover of the wireless device to the target RBS.

A mobile management handover system includes circuitry that determines available resources of candidate target handover cells of a user device. The circuitry then select a target handover cell from the candidate target handover cells based on at least one of the available resources of each of the candidate target handover cells and a residency duration of the user device within the candidate target handover cells, and requests reservation of the available resources by the target handover cell.

A method for operating a terminal for a communication network, the terminal, based on a future route of the terminal, transmitting a reservation request for logging into a radio cell of the communication network along the route via the communication network to a radio cell management server, to be able to log into the requested radio cell as a function of a response of the radio cell management server. A method for operating a radio cell management server, a terminal, a radio cell management server, a vehicle, and a computer program, are also described.

An operation method of a terminal, for a handover in a mobile communication system, may comprise performing measurement on beams of a target base station, and transmitting a measurement result of at least one beam of the target base station to a source base station; receiving, from the source base station, a handover command message including information on at least one RACH resource for the at least one beam; transmitting a handover indication message including information on at least one random access target beam having an order of channel conditions determined based on a latest measurement to the source base station and to the target base station through the source base station; and determining an optimal beam among the at least one random access target beam, and transmitting a RACH to the target base station through a RACH resource allocated to the optimal beam.

An apparatus comprising at least one processing circuitry, and at least one memory for storing instructions to be executed by the processing circuitry, wherein the at least one memory and the instructions are configured to, with the at least one processing circuitry, cause the apparatus at least: to acquire connection information including at least one of route information and resource requirement information for at least one communication element in a coverage area of a communication network, the communication network comprising a plurality of access points allowing the at least one communication element to communicate with the communication network, to process the acquired connection information for determining at least one candidate for a following access point to be connected to by the at least one communication element following to an access point to which the at least one communication element is currently connected, and to use a result of the determination of the at least one candidate for a following access point for optimizing communication settings in the communication network for the at least one communication element moving in the communication network.

A system that incorporates the subject disclosure may include, for example, monitoring a speed and an acceleration of a mobile communication device in a serving cell of a wireless network where the mobile communication device has a radio resource control connection with the wireless network, and selecting a first mobility speed group from among a plurality of mobility speed groups based on the speed and the acceleration of the mobile communication device, where handover parameter values are assigned to each speed group of the plurality of mobility speed groups, and where the handover parameters and their associated values are utilized for a handover by the wireless network from the serving cell to a target cell. Other embodiments are disclosed.

The present specification suggests a method for establishing a terminal-centric group cell on the basis of measurement signal variation for cooperative transmission and handover in a mobile communication system. Specifically, a base station receives transmissions of parameters from a terminal, configures a terminal surrounding cell information table, and configures a cooperative cell cluster configuration table using the terminal surrounding cell information table as the terminal moves. The base station performs cooperative transmission and handover using the cooperative cell cluster configuration table. The terminal sends parameters to the base station periodically or when a certain condition is met, and the base station updates the terminal surrounding cell information table and the cooperative cell cluster configuration table using the parameters sent from the terminal to thereby use the same for mobility management.

Distance is employed to facilitate sector selection and re-selection in a network during handoff. A system receives measurement information for a mobile device. The measurement information includes information indicative of a geographical location of the mobile device. The system determines information indicative of a geographical location of a cell site to which the mobile device is assigned. The system then selects a sector of the cell site with which to associate the mobile device. The selection of the sector is based, at least, on a distance determined between the mobile device and the cell site. In various embodiments, the distance information is determined based on the latitude and longitude of the mobile device. In various embodiments, the morphology of the terrain for the area in which the mobile device is located is factored into the determination of the sector.

A cell selection method and an apparatus are provided. The method includes: performing, by a terminal, cell measurement; obtaining, by the terminal, cell selection auxiliary information; and performing, by the terminal, cell selection or cell reselection according to a cell measurement result and the cell selection auxiliary information. By using the method, the terminal can select a more suitable cell.