Abstract: An apparatus comprises means for monitoring uplink transmissions from a communications device to determine if the frequency and/or timing of the uplink transmissions are as expected and means for scheduling for the communications device a position acquisition gap when the frequency and/or timing of the uplink transmissions are not as expected.

Abstract: A method, apparatus, and computer-program product are provided. In the context of a method, the method receives, from a first network node via a source satellite, a system information block, wherein the system information block indicates a random access channel opportunity window in which the user equipment should access the first network node or a second network node. The method includes determining, based on the system information block, an access time within the random access channel opportunity window. The method includes transmitting, to the first network node or the second network node via a target satellite, a random access channel preamble at the access time.

Abstract: Systems, methods, and apparatuses for CHO recovery in NTN are provided. One method may include a UE selecting at least one cell of a NTN, determining whether the selected cell is a CHO candidate cell and, when it is determined that the selected cell is a CHO candidate cell, evaluating one or more CHO conditions. The evaluating may include: determining if a timer measuring a duration of a time window within which the UE is allowed to execute the CHO is running or if a distance between the UE and the selected cell is below a configurable threshold, determining if an expiration of the timer or the distance is within a defined offset, and/or determining if the selected at least one cell is within a chain of CHOs list. When it is determined that the CHO condition(s) are met, attempting the CHO procedure to the selected cell.

Abstract: Common delay(s) are set for a base station, the base station and a UE able to communicate via signals and to use the common delay(s) in communication. The common delay(s) correspond to delay in communication of the signals in a path from a simulated satellite to a reference point, which is a point selected between the base station and the simulated satellite. The UE is placed in a known location. Ephemeris values are set for the base station for the simulated satellite and caused to be broadcasted toward the UE. The ephemeris values represent positioning of the simulated satellite through which the signals are supposed to travel. In response to communication over the path by the UE, error is determined corresponding to at least timing at least between the UE and the reference point.

Abstract: Message(s) are created to be transmitted over a geostationary system. The message(s) include coverage information for non-geo stationary satellite(s) in an NTN from PLMN(s). The message(s) are transmitted over the geostationary system. A UE searches for a PLMN. The UE, in response to finding a PLMN transmitting, using a geostationary system, message(s) including coverage information for non-geo stationary satellite(s) in an NTN, receives the message(s). The UE updates preferences used for a list used for PLMN selection to make PLMN(s) corresponding to the coverage information as higher priority than other PLMN(s) in the list. The UE performs cell search(es) for cells from the non-geo stationary satellite(s) using the updated list.

Abstract: Various example embodiments relate to a solution for network communication. A network device may be configured to cause transmission of cell operation mode configuration parameters to be applied in a cell operation mode; and cause transmission of a cell operation mode indication associated with at least one cell of a network, the cell operation mode indication initiating a cell transmission power change sequence.

Abstract: Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media for beam information reporting. In example embodiments, a first device receives from a second device a configuration of a plurality of segment durations for transmission from the first device to the second device. Further, the first device determines a segment duration of the plurality of segment durations. Moreover, the second device determines a transmission scheme based on the determined segment duration.

Abstract: A method including receiving, at a user equipment, one or more location related information, where the location related information comprises information based upon location related to one or more satellite; determining, by the user equipment, timing advance, where the determining is at least partially based upon the location related information; determining, by the user equipment, to perform a preconfigured uplink resource transmission; and performing, based at least partially upon the determined timing advance, the preconfigured uplink resource transmission.

Abstract: There is provided an apparatus that is caused to: in response to determining that a plurality of access points to be configured to provide positioning reference signals to a user equipment comprises at least one non-terrestrial access point and at least one terrestrial access point: determining, for the at least one non-terrestrial access point, a propagation delay for signalling between said non-terrestrial access point and the user equipment; using the determined propagation delay to select a configuration of at least one of: a duration of a measurement gap at the user equipment in which the user equipment is to perform positioning-related measurements on positioning reference signals transmitted by the plurality of access points, and a transmission time of at least one positioning reference signal to be provided to the user equipment by at least one of the plurality of access points; and signalling the selected configuration.

Abstract: The present disclosure relates to on transition to another cell without handover in non-terrestrial network (NTN). In particular, a NTN device transmits information related to a set of NTN devices to a terminal a first device receives assistance information of a NTN device from a second device. The assistance information at least indicated a type of a cell switching. The first device skips buffer flushing and security key updating regardless of the type of cell switching. In this way, it can achieve cell switching without handover.

Abstract: A device receiving a transmission is configured to provide its feedback in a unique resource pattern within a set of resources (a resource pool). The resource pattern used by the device overlaps partially with one or more resource patterns used for feedback transmissions by other devices in the group. The transmitting device is able to identify the device by identifying an activation pattern matching the unique resource pattern of the device in the overall feedback that it receives from the devices of the group.

Abstract: Example embodiments of the present disclosure relate to store-and-forward operations in non-terrestrial networks (NTN). In an aspect, a terminal device receives, from a network device of a NTN, data priority information associated with at least one store-and-forward operation performed by the network device in the NTN. The terminal device performs, based on the data priority information, an operation for uplink data of the terminal device. In this way, the limitations on the storage of the satellite and the feeder link capacity are solved. The data transmission is ensured, and the storage of the satellite is maximally utilized.

Abstract: The present disclosure relates to on transition to another cell without handover in non-terrestrial network (NTN). In particular, a NTN device transmits information related to a set of NTN devices to a terminal a first device receives assistance information of a NTN device from a second device. The assistance information at least indicated a type of a cell switching. The first device skips buffer flushing and security key updating regardless of the type of cell switching. In this way, it can achieve cell switching without handover.

Abstract: A method comprising, at a user device, comprising obtaining a target parameter representative of a handover rate from a base station, comparing said target parameter representative of a handover rate with a measured parameter representative of a handover rate, adjusting at least one measurement trigger event parameter as a result of said comparison in a direction tending to reduce the difference between said two rates, sending a measurement report to said base station if a trigger condition using said at least one adjusted trigger event parameter is met.

Abstract: Example embodiments of the present disclosure relate to a solution for configuring a retransmission in communications. In an aspect, a first device transmits, to a second device, a first indication of a plurality of candidate retransmission configurations. Each of the plurality of candidate retransmission configurations includes a transmission feedback configuration and/or a data retransmission configuration. The first device selects a target retransmission configuration from the plurality of candidate retransmission configurations. The first device transmits, to the second device, a second indication of the target retransmission configuration. The first device communicates with the second device using the target retransmission configuration. The example embodiments of the present disclosure provide a dynamical multi-level indication for a retransmission scheme.

Abstract: A method is provided that includes scheduling transmission of system information blocks (SIBs) including information elements with assistance information for a first aerospace platform, and a separate at least one information element with assistance information for a second aerospace platform. The first aerospace platform and the second aerospace platform are configured to provide respectively a first non-terrestrial network (NTN) cell and a second NTN cell that are quasi-Earth-fixed cells serving a geographic area for limited periods of time. The method also includes causing a user equipment in the first NTN cell to acquire the separate at least one information element with the assistance information for the second aerospace platform, during a period of time the geographic area is served by the first NTN cell, before the geographic area is served by the second NTN cell.

Abstract: Method comprising: receiving, from a first cell of a satellite, a handover command triggering a handover of a terminal from the first cell of the satellite to a second cell of the satellite and an assumed location of the terminal; determining an actual location of the terminal; checking one or more of the following conditions applies: the actual location of the terminal deviates from the assumed location by more than a first threshold, and the actual location of the terminal is on the side of the first cell of the coverage boundary and remote from the coverage boundary by at least a second threshold; preventing the terminal from performing the handover if at least one of the one or more checked conditions is fulfilled.

Abstract: Various example embodiments relate to a solution for non-terrestrial network communication. A user device for non-terrestrial network communication may be configured to receive a paging message from a first network device of a first non-terrestrial network; and in response to the paging message, initiate a random access procedure with a second network device associated with a second non-terrestrial network to establish a radio resource connection with the second network device. Network devices, methods and computer-programs are also provided.

Abstract: A UE, connected using a current cell served by a first satellite to a BS, receives information from the BS including assistance information for a cell switch from the current cell to a cell served by a second satellite. The information is received before a stop time indicating when the current cell will stop serving the UE. The UE performs the cell switch from the current cell to the cell served by the second satellite using at least the assistance information to find cell synchronization block(s) for the served by the second satellite. The BS sends the information from the BS including the assistance information for a cell switch from the current cell to a cell served by a second satellite. The BS shuts down the current cell at a stop time.

Abstract: An apparatus for a terminal device, the apparatus comprising at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, cause the terminal device to: determine first information characterizing a difference between a first timing advance value associated with a first radio cell that is at least temporarily provided to the terminal device by a first device and a second timing advance value associated with a second radio cell that is at least temporarily provided to the terminal device by a second device, and to transmit the first information to a network device associated at least with the first radio cell.