To enable avoidance of termination of wireless connection between a base station and a terminal apparatus. A first base station (a base station 100A) comprises: an acquisition unit 141 configured to acquire mobility information on a terminal apparatus 200, the mobility information corresponding to information related to a beam formed for wireless communication with the terminal apparatus 200; and a control unit 143 configured to control processing related to handover for the terminal apparatus 200, based on the mobility information on the terminal apparatus 200.

The present application relates to the field of communications technologies, and provides an inter-small cell handover method, a device, and a system. When UE is in a coverage hole of a serving small cell, the UE needs to perform synchronous measurement only on each available beam pair in a set of available small cells determined by the UE, thereby reducing a delay of re-accessing a high frequency network by the UE, and improving QoS of receiving a high frequency service by the UE. the present application includes: performing, by UE, synchronous measurement, to determine a set of small cells available for the UE; sending the set of available small cells to a macro base station; when the UE is in a coverage hole of a current serving small cell, receiving, by the UE, a first synchronization indication sent by the macro base station.

A network comprising a first base station (BS) and a second BS is configured to execute instructions of the first BS connecting to a communication device via a first cell of the first BS with a signaling radio bearer (SRB); the second BS as a secondary node (SN) connecting to the communication device via a second cell while the first BS as a master node (MN) connecting to the communication device; the first BS transmitting a SN Modification Request message to a second BS to add or modify a configuration of the SN for the communication device in dual connectivity (DC); and the second BS transmitting a SN Modification Request Acknowledge message comprising to the first BS in response to the SN Modification Request message, wherein the SN Modification Request Acknowledge message comprises a new or modified configuration and a random access (RA) channel (RACH) configuration.

A method of selecting a set of beams to be monitored by a User Equipment, UE, in a telecommunication network, said telecommunication network comprising a Base Station, BS, function coupled to at least one Access Node, AN, serving said UE, said method comprising the steps of receiving measurement data comprising measurements of qualities of beams observed by said UE, wherein said beams originate from said at least one AN to said UE, and originate from at least another AN in said telecommunication network to said UE, retrieving at least one measurement data from a particular UE that matches the received measurement data, wherein the historical database comprises historical measurement data comprising measurements of qualities of beams observed by UE's in said telecommunication network over time, selecting a set of beams to be monitored by said UE based on said retrieved at least one measurement data from said particular UE and based on subsequent measurement data of said particular UE over time in said historical database, and transmitting said selected set of beams to be monitored to said UE.

A satellite network comprises networks nodes including multiple satellites, multiple gateways, additional servers and a mobile vehicle (e.g., an aircraft). All of (or a subset) of the network nodes include switches. The network implements a software defined network that includes a mobility manager as part of the management plane, a network controller as part of the control plane, and the switches on the network nodes as the data plane. In one embodiment, the switches communicate using an Open Flow communications protocol and make routing decisions based on flow tables. The mobility manager communicates with, and manages, the switches via the network controller. The mobility manager proactively generate updates to flow tables based on satellite ephemeris data for the multiple satellites and itinerary data for the aircraft, and pushes the updates to the switches in response to determining that the aircraft needs to be handed off between satellites.

The invention refers to a method for performing a handover of a user equipment, UE (10), from one or a plurality of source beams of a source access node, AN (14) to one or a plurality of target beams of a target access node, AN (16), wherein the target AN performs the steps of receiving from the source AN (14) a positioning information indicative of a first position estimate of an actual position of the UE (10), determining or initiating determining a resulting position estimate, wherein the resulting position estimate is derived from the first position estimate, and activating the one or the plurality of target beams in dependency of the resulting position estimate. The invention further refers to a method wherein the target AN (16) performs the steps of receiving from the source AN the positioning information indicative of a first position estimate, determining or initiating determining a second position estimate associated to the an actual position of the UE (10), determining or initiating determining a delta position between the first position estimate and the second position estimate, and storing or initiating storing the delta position. The invention further refers to a method wherein the source AN (14) performs the steps of determining or initiating determining a first position estimate of an actual position of the UE (10), and sending to the target AN (16) an information indicative of the first position estimate of an actual position of the UE (10). The invention further refers to corresponding access nodes (14, 16) and a software program.

A method and apparatus for operating a satellite system including different satellites that may belong to different types of satellite constellations. In some implementations, the satellite system may include a LEO satellite constellation and one or more non-LEO satellite constellations that can be used to increase the forward link capacity of the LEO satellite constellation, for example, by allowing an LEO satellite to offload at least some of its forward link traffic to one of the non-LEO satellites. The user terminals can dynamically switch forward link communications between a LEO satellite and a non-LEO satellite while maintaining a return link connection with the LEO satellite.

A method and apparatus for operating a satellite system including different satellites that may belong to different types of satellite constellations. In some implementations, the satellite system may include a LEO satellite constellation and one or more non-LEO satellite constellations that can be used to increase the forward link capacity of the LEO satellite constellation, for example, by allowing an LEO satellite to offload at least some of its forward link traffic to one of the non-LEO satellites. The user terminals can dynamically switch forward link communications between a LEO satellite and a non-LEO satellite while maintaining a return link connection with the LEO satellite.

Embodiments of the present disclosure relate to methods and apparatus for beam maintenance in a radio access network, in particular, through random access preamble transmission for beam maintenance. A terminal device receives, from a network device, a resource configuration for contention-free random access. The resource configuration indicates a plurality of CFRA resources each associated with a respective synchronization signal and physical broadcast channel block index or channel state information reference signal index. The plurality of CFRA resources are applicable for timing advance acquiring in a target network device. The terminal device transmits, to the target network device, one or more CFRA physical random access channels based on the resource configuration. In this way, beam maintenance may be performed based on an SSB index or CSI-RS index associated with one of the transmitted CFRA PRACH(s) before a cell switch command or a random access response.

The present disclosure relates to a 5th-generation (5G) or 6th-generation (6G) communication system for supporting higher data rates. A user equipment (UE) according to an embodiment of the present disclosure may receive configuration information about channel measurement for supporting an additional cell, perform, based on the configuration information about the channel measurement, channel measurement on at least one additional cell configured for the UE, receive a medium access control (MAC) control element (CE) indicating beam switching by the UE, based on a report on the channel measurement, and perform transmission or reception of data by using a beam switched based on the received MAC CE.