Abstract: A communication device can be configured to operate in a non-terrestrial network that includes a network node communicatively coupled to the communication device via a satellite. The communication device can determine when to perform an access offset determination (“AOD”) relative to a paging occasion (“PO”).

Abstract: According to some embodiments, a method performed by a wireless device for non-terrestrial network (NTN) connection control comprises receiving a message comprising parameters from which the wireless device is informed that it is to disconnect from a terrestrial network (TN) and connect to one of one or more NTNs or disconnect from a NTN and connect to one of one or more TNs. Upon the parameters informing the wireless device to connect to one of one or more NTNs, the method further comprises: disconnecting from the TN; based at least in part on the one or more parameters, selecting one of the detected at least one of the one or more NTNs; and connecting to the selected NTN. Upon the parameters informing the wireless device to connect to one of one or more TNs: the method further comprises disconnecting from the NTN, and detecting, selecting, and connecting to the TN.

Abstract: A method performed by a wireless device includes obtaining a remaining service time (Tservice) associated with a first satellite or first spot beam. Based on the remaining service time, the wireless device determines whether to initiate a connection with the first satellite or first spot beam.

Abstract: According to some embodiments, a method performed by a wireless device comprises: receiving a broadcast of full ephemeris data for a serving cell satellite, the broadcast of full ephemeris data occurring at a first periodicity; determining a position of the serving cell satellite based on the full ephemeris data; receiving a broadcast of delta ephemeris data for the serving cell satellite, the broadcast of delta ephemeris data occurring at a second periodicity more frequent than the first periodicity; and determining a position of the serving cell satellite based on the full ephemeris data and the delta ephemeris data.

Abstract: A method (1000) by a wireless device (110) is provided for determining cell coverage area provided by one or more satellites. The method includes receiving (1002) information at the wireless device. The wireless device uses (1004) the received information to obtain a location of the cell coverage area provided by the one or more satellites for a plurality of times.

Abstract: According to certain embodiments, a method performed by a wireless device comprises receiving Assisted-Global Navigation Satellite System (A-GNSS) information in system information broadcast by a network, receiving signals from a set of GNSS satellites (the set of GNSS satellites comprises at least three GNSS satellites), and determining a location of the wireless device using the A-GNSS information and information received in the signals from the set of GNSS satellites. The method further comprises determining Doppler time and frequency offsets compared to a network satellite. The Doppler time and frequency offsets are determined based on the location of the wireless device. The method further comprises initiating a connection process with the network satellite by transmitting a random access signal with pre-compensated time and frequency, the pre-compensated time and frequency based on the determined Doppler time and frequency offsets.

Abstract: A method (1200) performed by a wireless device (110) includes obtaining a remaining service time (Tservice) associated with a first satellite or first spot beam. Based on the remaining service time, the wireless device determines whether to initiate a connection with the first satellite or first spot beam.

Abstract: A technique for supporting mobility (602; 602?) of a radio device (100; 800; 1091; 1092; 1130) between a terrestrial network, TN (210), and a non-terrestrial network, NTN (500), is described. As to a method aspect of the technique performed by the radio device (100; 800; 1091; 1092; 1130), a control message (520) is received from at least one TN node (200; 900; 1012a; 1012c; 1120) of the TN (210) at the radio device (100; 800; 1091; 1092; 1130). The control message (520) is indicative of at least one NTN cell (512) of the NTN (500) for supporting the mobility (602) of the radio device (100; 800; 1091; 1092; 1130) between the TN (210) and the NTN (500).

Abstract: Methods performed by base stations and wireless devices for reducing RSRP and/or RSRQ measurements are disclosed. A method performed by a base station comprises indicating to a wireless device whether or not to perform cell selection and/or reselection measurements based on certain criteria. A method performed by a wireless device comprises determining whether or not to perform cell selection and/or reselection measurements based on certain criteria. Also disclosed are base stations and wireless devices configured to perform the methods.

Abstract: A method, system and apparatus are disclosed. In one or more embodiments, a network node for communicating with a wireless device is provided. The network node includes processing circuitry configured to receive measurement capability information of a wireless device where the measurement capability information indicates an ability to perform a global navigation satellite system, GNSS, measurement. The processing circuitry is further configured to determine a GNSS measurement gap configuration during which the wireless device is to perform at least one GNSS measurement during at least one GNSS measurement gap where the GNSS measurement gap configuration is based at least in part on the received measurement capability information, and indicate the GNSS measurement gap configuration to the wireless device.

Abstract: A method (1700) performed by a UE for location provisioning. The method includes determining to send location information. The method also includes, as a result of determining to send location information, sending the location information to a network node. Sending the location information to the network node comprises sending the location information using one or more PURs or sending a connection establishment procedure message as part of a connection establishment procedure, wherein the connection establishment procedure message comprises the location information.

Abstract: Embodiments include methods for operating a network node in a non-terrestrial network (NTN). Such methods include transmitting, to one or more user equipment (UEs), a first indication of at least one polarization mode configured for use in a first cell of the NTN and a second indication of at least one polarization mode configured for use in a second cell of the NTN. The polarization mode(s) configured for use in the first cell includes right-hand circular polarization and the polarization mode(s) configured for use in the second cell includes left-hand circular polarization. Alternately, the polarization mode(s) configured for use in the first cell includes left-hand circular polarization and the polarization mode(s) configured for use in the second cell includes right-hand circular polarization. Other embodiments include complementary methods for UEs, as well as network nodes and UEs configured to perform such methods.

Abstract: Methods and apparatus for obtaining a frequency offset corresponding to a Doppler shift of transmission and/or reception frequencies between a wireless device and a network node.

Abstract: Methods performed by base stations and wireless devices for reducing RSRP and/or RSRQ measurements are disclosed. A method performed by a base station comprises indicating to a wireless device whether or not to perform cell selection and/or reselection measurements based on certain criteria. A method performed by a wireless device comprises determining whether or not to perform cell selection and/or reselection measurements based on certain criteria. Also disclosed are base stations and wireless devices configured to perform the methods.

Abstract: Embodiments include methods for operating a network node in a non-terrestrial network (NTN) that utilizes one or more polarization modes for serving one or more cells. Such methods include transmitting, to one or more user equipment (UEs), an indication of at least one polarization mode configured for use in a first cell of the first NTN. The at least one polarization mode can be indicated in various ways, both explicitly and implicitly. Such methods also include transmitting and/or receiving one or more signals or channels in the first cell according to one or more configured polarization modes including the at least one indicated polarization mode. Other embodiments include complementary methods for operating UEs, as well as network nodes and UEs configured to perform such methods.

Abstract: Methods and apparatus for obtaining a frequency offset corresponding to a Doppler shift of transmission and/or reception frequencies between a wireless device and a network node. In one embodiment a method is performed by a wireless device for operating in a non-terrestrial network, NTN, the NTN having at least one network node and a communication satellite, wherein the at least one network node is one of a terrestrial base station and a satellite base station or satellite gateway, the method includes obtaining a frequency offset corresponding to a Doppler shift of transmission and/or reception frequencies between the wireless device and the network node and applying the frequency offset to an uplink transmission to the network node.

Abstract: A method is performed by a wireless device for communication in a non-terrestrial network, NTN, comprising at least a first non-terrestrial network node and a second non-terrestrial network node. The method includes determining an estimated location of the wireless device. The method further includes obtaining first location information associated with the first non-terrestrial network node and second location information associated with the second non-terrestrial network node. The method further includes calculating an estimated signal time arrival difference based on the location of the wireless device, the first location information, and the second location information. The method further includes using the estimated signal time arrival difference to provision an NTN-specific synchronization signal/physical broadcast channel, SS/PBCH, block measurement timing configuration, NTN-SMTC.

Abstract: Embodiments include methods for radio link monitoring (RLM) by a user equipment (UE) in a combined terrestrial and satellite wireless communication network. Such methods include, during a discontinuity in a connection between a UE and a terrestrial network node (TNN), performing RLM of the connection based on a second configuration. Such methods also include, before and/or after the discontinuity, performing RLM of the connection based on a first configuration. The connection includes a first link between the UE and a satellite and a second link between the satellite and the TNN. The discontinuity includes a link switch in at least one of the first link and the second link. The RLM before, during, and after the discontinuity can include various first, second, and third operations, respectively. Embodiments also include complementary methods performed by a TNN, as well as UEs and TNNs configured to perform operations corresponding to such methods.

Abstract: A system, method and non-transitory computer readable media for facilitating reduced signaling load with respect to UE location reporting in a non-terrestrial network (NTN) environment (100) interoperable with one or more terrestrial cellular communications networks. In one embodiment of an index-based location reporting scheme, a UE (105, 1200) may receive (402) a list of reference locations from a network node (1000, 1100), each identified with an index. Responsive to receiving the list of reference locations, the UE (105, 1200) may report to the network node (1000, 1100) an index or a subset of indices of one or more reference locations that match a specific reporting criterion. In an example implementation, reporting of index-based location information by the UE (105, 1200) may be configurably triggered, e.g., periodically or in response to the occurrence of a particular event, condition, etc.

Abstract: The present disclosure relates to a method performed by a UE for enabling GNSS measurements. The UE and a network node are included in a NR communications network, and the NR communications network includes a NTN component. The UE performs a GNSS measurement according to a rule and using a GNSS receiver included in the UE. At least one of a UE position and an absolute time is an output of the GNSS measurement or is derivable from the GNSS measurement.