A method for multibeam coverage of a region of the surface of the Earth includes the generation, by a telecommunications payload embedded on a satellite, of a plurality of radiofrequency beams, called elementary beams; the formation of a plurality of radiofrequency beams, called composite beams, exhibiting footprints on the ground of different sizes, each the composite beam being obtained by the grouping of one or more elementary beams; and the transmission or the reception of data through the composite beams, identical data being transmitted or received through all the elementary beams forming one and the same composite beam.

A downlink interference is dynamically suppressed in a multi-feeder link of a same frequency between an aerial-floating type communication relay apparatus and plural gateway (GW) stations with a simple configuration. A plurality of pilot signals, which are spectrally spread using a plurality of spread codes orthogonal to each other, are transmitted and received between the relay communication station of the aerial-staying type communication relay apparatus and plural GW stations, a propagation path response between plural GW stations and an antenna for feeder link of the communication relay apparatus in a transmission signal band of the feeder link is estimated based on reception results in which the plural pilot signals are spectrally inverse-spread, plural weights respectively corresponding to the plural of GW stations are calculated based on the plural propagation path responses, and with respect to each of the plural GW stations, a signal to be transmitted and received via a directional beam corresponding to another GW station is multiplied by the weight corresponding to the other GW station and subtracted from a signal to be transmitted and received via the directional beam corresponding to the GW station.

A method and system for mitigating inter-satellite interference are provided. The method includes modifying a beam bore-sight of a satellite according to a hexagonal mapping, identifying beams of the satellite positioned outside of the hexagonal mapping, and reducing power of the beams positioned outside of the hexagonal mapping.

A method for multibeam coverage of a region of the surface of the Earth includes the generation, by a telecommunications payload embedded on a satellite, of a plurality of radiofrequency beams, called elementary beams; the formation of a plurality of radiofrequency beams, called composite beams, exhibiting footprints on the ground of different sizes, each the composite beam being obtained by the grouping of one or more elementary beams; and the transmission or the reception of data through the composite beams, identical data being transmitted or received through all the elementary beams forming one and the same composite beam.

Methods, systems, and devices are described for low latency communications within a wireless communications system. An eNB and/or a UE may be configured to operate within the wireless communications system and may send triggers to initiate communications using a dedicated resource in a wireless communications network that supports transmissions having a first subframe type and a second subframe type, the first subframe type comprising symbols of a first duration and the second subframe type comprising symbols of a second duration that is shorter than the first duration. Communications may be initiated by transmitting a trigger from the UE or eNB using the dedicated resource, and initiating communications following the trigger. The duration of time between the trigger and initiating communications can be significantly shorter than the time to initiate communications using legacy LTE communications.

Apparatuses, methods, and systems of hub communication with a satellite network or a terrestrial network are disclosed. One method includes detecting presence of the satellite network, detecting, by the hub, presence of a terrestrial network, selecting to connect to one of the satellite network or the terrestrial network based on a priority ruleset, estimating a propagation delay between the hub and a base station of the satellite network when the satellite network is selected, adjusting a timing offset between transmit and receive radio frames at the hub based on whether the satellite network or the terrestrial network is selected, and based at least on the propagation delay and a fixed frame offset between uplink and downlink frames at base station, and communicating with the base station of the satellite network or a base station of the terrestrial network.

A method for operating an infrastructure equipment forming part of a non-terrestrial network, NTN, of a wireless communications network is provided. The method comprises transmitting a plurality of spot beams, each of the spot beams providing a wireless access interface for transmitting signals to and/or receiving signals from communications devices within a coverage region formed by the each of the spot beams, determining, for one or more of the spot beams, that the coverage region formed by the one or more of the spot beams is at least partially located within a geographical region in which NTN services are not permitted, and changing a utilisation state of each of the one or more of the spot beams from a first utilisation state to a second utilisation state.

Apparatuses, methods, and systems of hub communication with a satellite network or a terrestrial network are disclosed. One method includes detecting presence of the satellite network, detecting, by the hub, presence of a terrestrial network, selecting to connect to one of the satellite network or the terrestrial network based on a priority ruleset, estimating a propagation delay between the hub and a base station of the satellite network when the satellite network is selected, adjusting a timing offset between transmit and receive radio frames at the hub based on whether the satellite network or the terrestrial network is selected, and based at least on the propagation delay and a frame offset between uplink and downlink frames at base station, and communicating with the base station of the satellite network or a base station of the terrestrial network.

The present teachings include a method and computing apparatus for triggering synchronization of a satellite modem to a carrier frequency of a beam of a satellite, retrieving ephemeris information for the satellite and beam configuration information for the beam, calculating a velocity of the satellite per the ephemeris information, and adjusting the carrier frequency of the satellite modem when communicating via the beam to compensate for a doppler offset induced in the carrier frequency by the velocity. In the method, the satellite has a satellite type selected from a Geosynchronous Earth Orbit (GEO), Medium Earth Orbit (MEO) or Low Earth Orbit (LEO) type of satellite, and the satellite type is different than a satellite type of an immediately preceding synchronization.

Embodiments provide in-flight configuration of satellite pathways to flexibly service terra-link and cross-link traffic in a constellation of non-processed satellites, for example, to facilitate flexible forward-channel and return-channel capacity in a satellite communications system. For example, each satellite in the constellation can include one or more dynamically configurable pathway, and switching and/or beamforming can be used to configure each pathway to be a forward-channel pathway or a return-channel pathway in each of a number of timeslots according to a pathway configuration schedule. At least some of the pathways can be further selectively configured, in each timeslot, to carry “terra-link” traffic to and/or from terrestrial terminals and “cross-link” traffic to and/or from one or more other satellites of the constellation.