Various solutions for hybrid automatic repeat request (HARQ) design in non-terrestrial network (NTN) communications with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine a maximum number of HARQ processes that the apparatus can support. The apparatus may transmit a capability report to indicate the maximum number of HARQ processes. The apparatus may perform HARQ process transmissions based on the maximum number of HARQ processes.

The present invention discloses a system for real-time transmission of large-capacity of a deep-sea subsurface mooring based on a Beidou satellite. Data transmission is implemented by a mechanism of single module multi-card switching operation and dynamic subcontracting transmission. A receiving module is connected to a fixed card and is responsible for receiving state information on whether the transmission is successful. A subsurface mooring end antenna and a land-based antenna adopt a network analyzer to perform secondary matching on parameters such as frequency offset and impedance of the assembled antenna, and effectively intercept original data. In addition, arithmetic coding and dictionary coding are adopted for data compression. While an acquisition board terminal processes original valid data, the valid data is compressed to a maximum of one third of the original data, which can be extended into a parallel mode of multiple single-mode multi-card modules.

A communication device includes a session and mobility management block configured to interface with a mobility management entity (MME) of an evolved packet core (EPC) of an evolved packet system (EPS). An access non-LTE air interface circuit is configured to communicate with an access network gateway. An EPS inter-working functional block including mapping and coordination logic is configured to map and coordinate a plurality of functionalities associated with the access non-LTE air interface circuit into corresponding functionalities associated with the session and mobility management block.

In aspects, a non-terrestrial communication system communicates with a user equipment, UE, using repetitive communications. The non-terrestrial communication system determines (905, 940) a repetition configuration for repetitive communications with the UE and indicates (910, 915) the repetition configuration to the UE. The non-terrestrial communication system communicates (920) with the UE using the repetitive communications in accordance with the repetition configuration.

Various examples and schemes pertaining to uplink (UL) transmission timing for non-terrestrial networking (NTN) are described. An apparatus receives, from a network, downlink control information (DCI) indicating an NTN offset for a scheduling delay. Accordingly, the apparatus performs one or more UL transmissions to a satellite with the scheduling delay which accounts for the

A method performed on-board by a satellite for processing a signal received from a terminal during a current time interval, includes receiving, during the current time interval, a main signal containing a message from a terminal, each message having a priority level; sampling the main signal to obtain samples; storing the obtained samples into the satellite memory; first demodulating the messages corresponding to the current time interval contained in the samples stored in memory; when the satellite is in the range of a ground station, transmitting to the ground station the content of the memory. The first demodulating includes, for each message of the messages contained in the samples and by priority order: demodulating and decoding the message; forwarding, using direct link or inter-satellite-link, the demodulated message to a ground station; estimating the number of remaining non-demodulated messages in the samples stored in the memory.

In a method and apparatus for inter-satellite communications, transmissions between a satellite and neighboring satellites that share an orbital plane occur via an aft antenna or a forward antenna and transmissions between the satellite and neighboring satellites that do not share an orbital plane occur via the aft antenna or the forward antenna timed during orbital plane crossings. This occurs even if the total path length and number of links is higher than inter-satellite communications that use side-to-side transfers.

A multiple-access transceiver handles communications with mobile stations in environments that exceed mobile station design assumptions without necessarily requiring modifications to the mobile stations. One such environment is in Earth orbit. The multiple-access transceiver is adapted to close communications with mobile stations while exceeding mobile station design assumptions, such as greater distance, greater relative motion and/or other conditions commonly found where functionality of a terrestrial transceiver is to be performed by an orbital transceiver. The orbital transceiver might include a data parser that parses a frame data structure, a signal timing module that adjusts timing based on orbit to terrestrial propagation delays, frequency shifters and a programmable radio capable of communicating from the Earth orbit that uses a multiple-access protocol such that the communication is compatible with, or appears to the terrestrial mobile station to be, communication between a terrestrial cellular base station and the terrestrial mobile station.

Methods, systems, and apparatus, including computer-readable media, for location management for satellite systems. In some implementations, a controller of a satellite network system receives location data from a user terminal and registers the user terminal in a mobility area with a core network. The controller updates a mapping between satellite beams and mobility areas as the satellite beams move along the ground with respect to the mobility areas, then uses the updated mapping to communicate with the user terminal using an appropriate satellite beam. In some implementations, a controller of a satellite network system determines a mapping of satellite beams to mobility areas, and broadcasts, for each of multiple satellite beams, a message indicating (i) a set of mobility areas that are at least partially covered by the satellite beam and (ii) an indication of boundaries of the mobility areas in the set of mobility areas.

A method performed on-board by a satellite for processing a signal received from a terminal during a current time interval, includes receiving, during the current time interval, a main signal containing a message from a terminal, each message having a priority level; sampling the main signal to obtain samples; storing the obtained samples into the satellite memory; first demodulating the messages corresponding to the current time interval contained in the samples stored in memory; when the satellite is in the range of a ground station, transmitting to the ground station the content of the memory. The first demodulating includes, for each message of the messages contained in the samples and by priority order: demodulating and decoding the message; forwarding, using direct link or inter-satellite-link, the demodulated message to a ground station; estimating the number of remaining non-demodulated messages in the samples stored in the memory.