Methods and apparatus are disclosed for uplink power control of a terminal in a satellite communication system. Calibration data that includes output backoff values corresponding to input backoff values for each of a first set of calibration frequencies is initially stored in the terminal. A normalized transmit power for the terminal is determined for multiple transmit frequencies based on the calibration data. Upon receiving an assigned frequency for communicating, the terminal selects one of the normalized transmit power previously determined and begins transmitting.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for managing beam configurations and parameters for non-terrestrial networks. In some implementations, a UE may detect a synchronization signal block (SSB) transmitted by a satellite via a first beam. Aspects of the present disclosure recognize that each beam may be identified by a unique SSB index based at least in part on a time or frequency on which the SSB is received. Thus, the SSB may be identified based on a frequency-domain SSB index or a time-domain SSB index. The UE may further determine one or more wireless communication parameters associated with the first beam. The UE may generate a mapping between the SSB and the wireless communication parameters associated with the first beam, and thereafter communicate with the satellite using the mapping.

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.

This application provides a satellite communication method and apparatus. The method includes: A terminal device receives first indication information. The first indication information indicates a validity duration of first parameter information. The first parameter information includes at least one of the following information: a first timing advance, parameter information of the first timing advance, a first frequency offset pre-compensation, or parameter information of the first frequency offset pre-compensation. The terminal device performs uplink communication with a satellite in the validity duration based on the first parameter information. The terminal device can obtain, by receiving the first indication information, a validity duration of parameter information such as the first timing advance, the parameter information of the first timing advance, the first frequency offset pre-compensation, or the parameter information of the first frequency offset pre-compensation.

This disclosure proposes a system to manage radio frequency (RF) interferences towards earth stations to solve needs of network providers. For example, user a user equipment that is close to an earth station can cause signal interference with the earth station as the user equipment is communicating with a base station. However, if the base station shares earth station location information with the user equipment, the user equipment can adjust its frequency and/or reduce its signal power to mitigate interference with the earth station. Alternatively, or in addition to, the base station can adjust its signal strength, and/or terminate a signal or resource that it is sending to the user equipment to prevent signal interference with the earth station.

A method is provided for off-loading MAC (medium access control) functionalities that were previously carried out by satellites, and carry out these functionalities by control gateways that are located on the ground, and by implementing that to simplify the operation and maintenance of the satellite communications network.

An optimisation method is presented for the transmission of data along any radio frequency link which can be split into distinct transmission blocks, an example being a beam hopping system. By reordering the packets to be transmitted, it is possible to send packets either at, or nearer to, their optimal modulation and encoding configuration. This will allow for a higher bit to symbol conversion for the majority of packets and hence more data bits can be sent for the same number of symbols.

A satellite communication system and method for resizing an outroute carrier from a gateway to a terminal population including determining, at the gateway, an insufficiency based on an Uplink Power Control (ULPC) function in conjunction with an Adaptive Coding and Modulation (ACM) function failing to maintain the outroute carrier in operation; and downsizing, at the gateway based on the insufficiency, the outroute carrier by decreasing a symbol rate of the outroute carrier from the gateway while maintaining the aggregate carrier output power level to increase an outroute carrier margin, where the insufficiency is based on a fade. The outroute carrier may be upsized when the insufficiency expires or is reduced.

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for dynamically reducing an aperture size to reduce overhead. In some implementations, a server can receive a first transmission from a first terminal through a communication network. The server can determine a timing offset associated with the first terminal based on the first transmission. The server can determine an aperture window size for an aperture window for the first terminal based on the determined timing offset associated with the first terminal. The server can generate allocation data that assigns communication resources to one or more terminals that includes the first terminal, the allocation data being based on the determined aperture window size for the first terminal. The server can communicate with the one or more terminals to indicate the communication resources respectively allocated to the one or more terminals.

User equipment may configure a transmitter or receiver to conform to regulations or standards of a geographical region to communicate with non-terrestrial networks (e.g., satellite networks). In one embodiment, the user equipment may receive an indication of a regulation or standard to which to conform to from a terrestrial communication node, and apply an emission mask to the transmitter based on the regulation or standard. The user equipment may additionally or alternatively configure the receiver to be compliant with a noise level tolerance of a received signal specified by the regulation or standard. In some embodiments, the user equipment may implement a frequency offset between the received signal and an interfering signal associated with the noise level tolerance that is scaled based at least on a channel bandwidth associated with the desired signal. Moreover, the user equipment may scale the noise level tolerance based on the frequency offset.