At least one application service is provided to a user equipment (10), utilizing an application service platform (150A) at an access node (110A) of a cellular network and a further application service platform (150A) at a further access node of the cellular network. A parameter is determined which is indicative of a delay associated with transfer of context data from the application service platform (150A) to the further application service platform (150B) in one or more handover messages controlling a handover of the user equipment (10) from the access node (110A) to the further access node (110B). The context data are associated with at least one user session of the at least one application service provided to the user equipment (10). Depending on the determined delay, migration of the user session from the application service platform (150A) to the further application service platform (150B) is controlled.

A base station according to an embodiment is provided in a mobile communication network. The base station includes: a network communication unit configured to receive, from an evolved packet core (EPC), first switching information indicating that a radio terminal switches a communication path with the EPC from the mobile communication network to a wireless LAN; and a controller configured to start measurement of a staying time in which the radio terminal stays in the wireless LAN, in response to reception of the first switching information.

The present invention provides an AP handover method based on double wireless network interface cards. A mobile terminal actively scans the signal strength of an AP, compares the scanned signal strength with the signal strength of a currently accessed AP, and if the signal strength is greater than the signal strength of the current AP, starts handover; otherwise, continuously scans till the handover succeeds. To reduce the handover delay and in accordance with the characteristic that the moving paths are basically fixed in industrial application scenarios, the present invention provides a pre-learning mechanism, that is, before formal application, information such as the location of the AP and the handover sequence in the application scenario is learned and stored in a terminal node, so that specific scanning and handover can be implemented in formal application. The present invention solves the problem of rapid AP handover in the industrial mobile network scenario, the double wireless network interface cards are used to achieve handover without interruption, and the pre-learning mechanism is used in specific industrial application scenarios, so the scanning delay is further reduced.

A method for enhanced mobility management within a mobile communication network includes: generating, by the user equipment, information regarding a first radio cell and a second radio cell, and/or receiving, by the user equipment, information regarding the first radio cell and the second radio cell from the first radio cell and/or the second radio cell; and selecting, by the user equipment, either the first radio cell or the second radio cell, and/or requesting, by the user equipment, on-demand mobility support from the mobile communication network. The second step is performable by the user equipment both in case that the user equipment is in an idle state and in case that the user equipment is in a connected state.

A hand over (HO) parameter optimization module includes: (a) an interpolator that receives a measurement report comprising: (1) signal strength or signal quality values as measured by an user equipment (UE), (2) performance indicator values as measured by the UE, and (3) load values associated with at least one base station that serves the UE, identifying one or more time instances that lack signal strength, signal quality, performance indicator, or load values, and interpolating values for the identified one or more time instances; (b) storage that stores the received measurement report and interpolated values; and (c) an optimizer that optimizes one or more HO parameters per group based on stored measurement reports and interpolated values.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine predicted mobility information associated with the UE that indicates a predicted route of the UE and one or more cells associated with the predicted route. The UE may transmit the predicted mobility information to a source base station. The UE may perform a handover of the UE from the source base station to a target base station based at least in part on the predicted mobility information. Numerous other aspects are described.

In one aspect, an exemplary method involves a WCD: (i) determining a likelihood of roaming, wherein the likelihood of roaming indicates a likelihood that the WCD will be handed off from a preferred coverage area to a non-preferred coverage area; and (ii) using the likelihood of roaming as a basis for managing an active set of the WCD. In particular, the WCD may manage its active set by setting at least one active-set parameter affecting the number of active sectors in an active set of the WCD, and then maintaining its active set according to the setting of the at least one active-set parameter. According to an exemplary embodiment, a WCD will make an effort to increase the number of sectors in its active set when the likelihood of roaming is greater, and vice versa.

This disclosure relates to cellular service recovery techniques using cell-specific cellular service history information for an accessory device. According to some embodiments, cellular service history information relating to cellular service loss occasions for each of one or more cells from which the accessory device has previously lost cellular service may be stored. It may be determined that cellular service loss is currently occurring from a cell for which cellular service history information relating to cellular service loss occasions is stored. Cellular service recovery may be attempted using the cellular service history information relating to cellular service loss occasions for the cell from which the current cellular service loss is occurring.

A radio base station according to an embodiment constitutes a mobile communication network. The radio base station comprises: a controller configured to measure a stay time for which a radio terminal has stayed on a wireless LAN. The stay time is a period from when a first process through which the radio terminal switches a waiting destination or a connection destination from the mobile communication network to the wireless LAN is performed to when a second process through which the radio terminal switches the waiting destination or the connection destination from the wireless LAN to the mobile communication network is performed.

A method includes when a terminal needs to execute a circuit switched service again after completing the execution of the circuit switched service once, the terminal executes the circuit switched service again instead of immediately returning to a first network, and then returns to the first network when a preset condition is met.