Systems and methods are described for supporting dynamic antenna platform offset calibration for an antenna system mounted to a mobile vehicle. In particular, dynamic antenna platform offset calibration can be performed while communicating user data associated with the mobile vehicle (e.g., based at least in part on alignment calibration procedures including measurements of user data signals), with an antenna platform offset being updated when alignment calibration procedures have been performed at suitably separated spatial conditions. Accordingly, antenna platform offset calibration may be performed throughout the operation of the mobile vehicle without requiring that the vehicle be proactively aligned in a particular orientation for a dedicated calibration routine prior to using the antenna for communicating user data during normal operation of the mobile vehicle.

Systems and methods are described for supporting dynamic antenna platform offset calibration for an antenna system mounted to a mobile vehicle. In particular, dynamic antenna platform offset calibration can be performed while communicating user data associated with the mobile vehicle (e.g., based at least in part on alignment calibration procedures including measurements of user data signals), with an antenna platform offset being updated when alignment calibration procedures have been performed at suitably separated spatial conditions. Accordingly, antenna platform offset calibration may be performed throughout the operation of the mobile vehicle without requiring that the vehicle be proactively aligned in a particular orientation for a dedicated calibration routine prior to using the antenna for communicating user data during normal operation of the mobile vehicle.

Disclosed herein is a method for operating a terminal in a wireless communication system, the method may include obtaining, by a terminal, a TAI list from a network, identifying, by the terminal, at least one or more TAs through at least one or more TACs in system information that is broadcast, and transmitting a registration request message to the network according to whether or not there is a TA deleted from the TAI list based on the identified one or more TAs.

Described herein is a user equipment, UE, comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the UE at least to: receive, from the LMF via the serving network node, assistance information for supporting the multi-RTT-based positioning, wherein the assistance information comprises ephemeris information related to the serving network node and to the further network node relevant for the multi-RTT-based positioning; determine, based on the received assistance information, measurement gap for performing the multi-RTT related measurement; and perform the multi-RTT related measurement for the serving network node and the further network node in accordance with the determined measurement gap and preferably report a result thereof to the LMF.

A radio communication system for transmitting data to a ground station includes plural stochastically distributed orbiting satellites with plural antennas traversing a portion of the earth's surface divided into zones. The ground station has a unique address identifying itself and the zone where it is located. A local area network associated with the ground node includes at least one satellite that stores the identity of a satellite antenna paired with a ground station antenna to form a radio link for transmitting data onboard the satellite to the ground station. Other satellites in the local area network store the ground node address and the identity of an antenna paired with an antenna in another satellite that also has stored the ground node address. A wide area network includes at least one satellite, each of which stores the identity of an antenna paired with an antenna of another satellite that has stored the ground node zone to form at least one inter-satellite radio link. If a satellite with data onboard is not in a local area network associated with the destination ground node or a wide area network, the satellite transmits the data toward the ground node zone.

A system and a method for use in satellite communication are presented. The system comprising (a) one or more antenna units for receiving and transmitting electromagnetic radiation in selected frequency ranges, (b) a modem unit configured for modulating received input signals and modulating output electronic data to signals to be transmitted, (c) a processor unit connected to said one or more antenna units and to said modem unit. The processor unit comprises: antenna orientation optimizer module configured and operable for varying azimuth and elevation of signal transmission and reception the antenna units; and network registration module configured and operable for registering the system to a communication network. The registering comprising: selecting a free private communication channel provided by the network, generating a corresponding signal sequence for transmission to a hub. The registering module is configured to be responsive to appropriate notification signals in said private communication channel.

Embodiments of the present invention disclose a hierarchical network registration method. The method is applied to a hierarchical network formed by a terrestrial network and at least one layer of an air network, and the method includes: obtaining, by a radio network node, a registration result of an air network node, where the radio network node is located in the terrestrial network; the air network node is located in the air network, and covers the radio network node; and the registration result includes attribute information and beam information of the air network node; and broadcasting, by the radio network node, the registration result to a mobile user covered by the radio network node. The air network in the method of the present invention may be a satellite network, and the hierarchical network is a hierarchical network formed by the satellite network and the terrestrial radio network.

A method determines whether a user equipment (UE) has transitioned between an international area and a national area. The method triggers PLMN selection in response to the UE having transitioned between the international area and the national area.

The disclosure relates in some aspects to location reporting and paging for satellite communication. In one aspect, the disclosure relates to a user terminal (UT) sending a message to report information about the UT's location. A threshold may be used to control whether (e.g., when) the UT reports its location. The location information may be used to enforce area (e.g., country) restrictions for the UT. In one aspect, the disclosure relates to forwarding paging messages between network access controllers. For example, a network access controller that is not able to page a UT may forward a paging message to another network access controller. In one aspect, the disclosure relates to a list of paging areas that indicates where a UT need not perform a paging area update.

The disclosure relates in some aspects to location reporting and paging for satellite communication. In one aspect, the disclosure relates to a user terminal (UT) sending a message to report information about the UT's location. A threshold may be used to control whether (e.g., when) the UT reports its location. The location information may be used to enforce area (e.g., country) restrictions for the UT. In one aspect, the disclosure relates to forwarding paging messages between network access controllers. For example, a network access controller that is not able to page a UT may forward a paging message to another network access controller. In one aspect, the disclosure relates to a list of paging areas that indicates where a UT need not perform a paging area update.