A broadband communication system provides broadband communication services onboard an aircraft. The broadband communication system includes a satellite communication transceiver, a direct air-to-ground communication (DA2GC) transceiver, and a controller. The satellite communication transceiver is configured to communicate directly with a target satellite providing a satellite communication data pathway with a satellite ground station connected to ground networks. The DA2GC transceiver is configured to communicate directly with a DA2GC ground station providing an DA2GC data pathway with the ground networks. The controller is configured to control handoff between the satellite communication transceiver and the DA2GC transceiver for data communications between the broadband communications system and the ground networks, based on performance of at least one of the satellite communication data pathway and the DA2GC data pathway.

User circuitry within a wireless User Equipment (“UE”) in need of a network slice or a handoff between cells identifies a slice service type. The user circuitry processes an uplink interference threshold of a target cell based on the slice service type. The user circuitry identifies a preferred operating frequency band based on the slice service type and the uplink interference threshold of the target cell. The user circuitry transfers a service request for a wireless data service having the slice service type over the preferred operating frequency band to network circuitry. The network circuitry wirelessly exchanges data with a wireless access node associated with the target cell over the preferred operating frequency band to establish a packet data unit session comprising the slice service type.

User circuitry within a wireless User Equipment (“UE”) in need of a network slice or a handoff between cells identifies a slice service type. The user circuitry processes an uplink interference threshold of a target cell based on the slice service type. The user circuitry identifies a preferred operating frequency band based on the slice service type and the uplink interference threshold of the target cell. The user circuitry transfers a service request for a wireless data service having the slice service type over the preferred operating frequency band to network circuitry. The network circuitry wirelessly exchanges data with a wireless access node associated with the target cell over the preferred operating frequency band to establish a packet data unit session comprising the slice service type.

A communication apparatus, terminal apparatus, system and method are provided for performing wireless communication. The communication apparatus supports a plurality of component carriers, wherein one of the plurality of component carriers is designated as a current primary component and at least one of the plurality of component carriers is designated as a current secondary component carrier providing at least downlink communication. The communication apparatus comprises control circuitry for controlling a component carrier testing procedure for one or more component carriers. The testing procedure comprises, for each component carrier: establishing an uplink connection from the terminal apparatus to the communication apparatus using the component carrier; and determining a quality of the uplink connection for the component carrier. The control circuitry is responsive to completion of the testing procedure to designate an updated primary component carrier on the basis of the qualities of the uplink connections determined for the component carriers.

Multiple mobile cellular network (MCN) communication systems can be networked together to form a network of MCN communication systems (NOM). Each MCN communication system within the NOM can operate as an independent cellular network to provide communications between user equipment within a covered area. When a UE in one MCN of the NOM moves into a different MCN of the NOM, the corresponding MCN communication systems can handover the UE. The UE can also be handed over between MCN communication systems when the MCN communication systems move.

Multiple mobile cellular network (MCN) communication systems can be networked together to form a network of MCN communication systems (NOM). Each MCN communication system within the NOM can operate as an independent cellular network to provide communications between user equipment within a covered area. When a UE in one MCN of the NOM moves into a different MCN of the NOM, the corresponding MCN communication systems can handover the UE. The UE can also be handed over between MCN communication systems when the MCN communication systems move.

The present invention relates to the field of satellite communications, and in particular to a method for handover of a satellite base station, a terminal, the satellite base station, and a storage medium, for use in solving the problem that the current method for handover of the satellite base station is not accurate. In embodiments of the present invention, a terminal determines a pitch angle when accessing the satellite base station; and if the pitch angle is determined within a preset range, the terminal performs inter-satellite handover. Because in the embodiments of the present invention, the terminal can determine, according to the pitch angle and the preset range, whether to perform handover of accessing the satellite base station without additionally calculating other reference information, implementation of a system is simple, and a timing when the terminal needs to perform handover of the satellite base station can be accurately determined according to the preset range, so as to achieve quick and accurate handover of the satellite base station and improve determination efficiency of handover of the satellite base station.

A system includes a user equipment (UE) traveling at least at a predetermined velocity. The UE is in RRC_INACTIVE state since time T. The system further includes at least a first base station and a second base station. The first base station receives an RRC_INACTIVE state message from the UE. The RRC_INACTIVE state message includes a location and a velocity of the UE, and a time-lapse, which is an elapsed duration since T. In response to a paging message from a core network, the first base station predicts a location of the UE. In response to the UE being within range of the first base station, the first base station sends the paging message to the UE. In response to the UE being within range of the second base station, the first base station sends a request to the second base station to send the paging message to the UE.

A system includes a user equipment (UE) traveling at least at a predetermined velocity. The UE is in RRC_INACTIVE state since time T. The system further includes at least a first base station and a second base station. The first base station receives an RRC_INACTIVE state message from the UE. The RRC_INACTIVE state message includes a location and a velocity of the UE, and a time-lapse, which is an elapsed duration since T. In response to a paging message from a core network, the first base station predicts a location of the UE. In response to the UE being within range of the first base station, the first base station sends the paging message to the UE. In response to the UE being within range of the second base station, the first base station sends a request to the second base station to send the paging message to the UE.

A UE may perform a location-based conditional handover (CHO) based on a region information and size parameter associated with a serving cell of a non-terrestrial network (NTN). In time-based CHO, the UE may perform CHO in response to expiration of a network-configured wait time. Alternatively, the UE may perform CHO by randomly selecting a wait time from a network configured time range. The selection may be randomized using a network provided seed or using a cell Radio Network Temporary Identifier (RNTI) value. In elevation-based CHO, the UE may perform CHO in response to the elevation angle of a satellite being less than a network configured threshold. When the UE is configured with multiple cells of the NTN, and the CHO criteria for two or more of the cells are satisfied, the UE may select a target cell for CHO based on network indicated prioritization of the cells.