This present disclosure describes techniques for relaying user plane data from a core network to a recipient device via a terrestrial core network. An orchestration controller is described that is configured to receive an indication that a terrestrial core network has received user plane data for transmission to a recipient device, detect a constellation of Low Earth Orbit (LEO) satellites to transmit the user plane data to the recipient device, select at least a first LEO satellite to receive the user plane data, and transmit the user plane data to the first LEO satellite.

Systems and methods for controlling satellites are provided. In one example embodiment, a computing system can obtain a request for image data. The request can be associated with a priority for acquiring the image data. The computing system can determine an availability of a plurality of satellites to acquire the image data based at least in part on the request. The computing system can select from among a plurality of communication pathways to transmit an image acquisition command to a satellite based at least in part on the request priority. The plurality of communication pathways can include a communication pathway via which the image acquisition command is indirectly communicated to the satellite via a geostationary satellite. The computing system can send the image acquisition command to the selected satellite via the selected communication pathway.

A method and system for improving link performance for a user terminal (UT) in a satellite network is disclosed. The method including: providing a first beam servicing a first service area that is adjacent a second service area serviced by a second beam; transmitting, from the first service area, a transmission via the first beam to a receiver via a satellite; beamforming the first beam and the second beam at the receiver; extracting the first beam and a remnant signal of the first beam from the second beam; and processing the first beam and the remnant signal to receive the transmission, wherein the remnant signal may include a portion of the transmission received by a second beam antenna of the satellite.

Techniques are described to support call routing and location for a user equipment (UE) with satellite wireless access to a serving PLMN. The UE sends a Session Initiation Protocol (SIP) INVITE message to a network node, such as a P-CSCF, that includes an indication of satellite access for the UE. In response the network node sends a request to another network node for a cell ID for a fixed cell in which the UE is located. The fixed cell can be independent of satellite radio cells for the serving PLMN. The network node may receive the cell ID for the fixed cell and sends the SIP INVITE message to another network node (e.g., an E-CSCF or LRF) with the cell ID for the fixed cell. The other network node may use the cell ID to route the SIP INVITE message or obtain an approximate location of the UE.

A high-altitude platform (HAP) node provides communication service during an emergency. The HAP node uses a first network to provide communication services for handling calls initiated by at least one user equipment (UE). The HAP node detects that an emergency disruption has occurred that prevents the use of the first network. In response to detecting the occurrence of the emergency disruption, a mobile terminal (MT) in the HAP node searches for a second network able to accept emergency calls. The HAP node determines whether the second network will handle all calls initiated by the at least one UE or only emergency calls generated by the at least one UE. The HAP node handles the calls based on the determining and through the use of the second network.

This application provides a buffer determining method and apparatus, to resolve a problem of how a terminal device on a sidelink calculates a buffer size. The method includes: A terminal device determines a sidelink data rate, and determines a buffer size based on the sidelink data rate. In this embodiment of this application, the terminal device may determine the buffer size based on the sidelink data rate, to calculate a buffer size of terminal device in sidelink communication.

An apparatus method and system are disclosed for dynamically implementing spectrum configuration plans in a satellite communication system. A spectrum configuration plan is created, and validated to determine if it can be utilized within the predetermined coverage area. If any errors are generated while validating the spectrum configuration plan, it is rejected. Otherwise, system components are configured to provide communication within the predetermined coverage area using parameters specified in the spectrum configuration plan. The spectrum configuration plan is also transmitted to all terminals in the coverage area. The spectrum configuration plan is subsequently implemented for all communication within the predetermined coverage area.

A system and method for transmitting a data stream between a server and a user terminal, comprises at least one satellite gateway associated with a satellite router communicating with at least one satellite terminal associated with a terminal router, wherein the terminal router is configured, when it receives a stream request from a user terminal, to search for it in its memory resources and, if appropriate, transmit it to the user terminal, the satellite router is configured to transmit the request to the server, estimate a popularity of the stream and transmit a message of correspondence between the stream and broadcasting parameters then convert the stream into a point-to-multipoint stream adapted to the broadcasting parameters, the terminal router is configured to convert point-to-multipoint streams into point-to-point streams and transmit them to the user terminals.

The present application relates to a method and an apparatus for UE context transmission and reception. One embodiment of the subject application provides a method performed by a first Base Station (BS), which includes: broadcasting a first RAN-based Notification Area (RNA) covering a RNA location; determining a second BS which is about to cover the RNA location; and transmitting User Equipment (UE) context to the second BS via a direct link between the first BS and the second BS or via a core network before the first BS leaves the RNA location.

A method is provided for compensating time differences for the time alignment of uplink service frames and downlink service frames, the uplink service frames and the downlink service frames being exchanged between a satellite and a mobile terminal. The mobile terminal belonging to a 5G cell comprising a cell centre, the pre-compensation is calculated on the basis of a main beam directed towards the centre (O) of the cell (5G).