Method for pre-compensating time differences
AssigneeThales
InventorsMathieu Arnaud, Benjamin Baudry
Life of this patent
Estimating the term…
Abstract
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).
Claims13
A method for pre-compensation of time differences for the time alignment of uplink service frames (UE UL) and downlink service frames (UE DL), said uplink service frames (UE UL) and said downlink service frames (UE DL) being exchanged between a multi-radiating element antenna in a satellite (SAT) and a mobile terminal (UE) in a main beam, said mobile terminal (UE) being adapted for providing 5G communications, wherein, the mobile terminal (UE) belonging to a 5G cell comprising a cell centre (O), the time pre-compensation is calculated and applied in the satellite on the basis of a main beam directed towards the centre (O) of said 5G cell, multiplexing and demultiplexing CPRI signals being performed in the satellite for the purpose of transmitting or receiving in a user link, a variable delay module, for each secondary beam, providing time-shifting for secondary beams, a main beam being formed from the secondary beams in the satellite including determining a direction of the main beam on the basis of position, velocity and acceleration parameters of the satellite and the centre of the 5G cell, weights determined by a base station of the 5G communication system being used to combine the secondary beams into the main beam in the antenna, between the time pre-compensation and the downlink part.
A payload of a satellite (SAT) comprising a device for pre-compensation of time differences for the purpose of time-aligning uplink service frames (UE UL) and downlink service frames (UE DL), said uplink service frames (UE UL) and said downlink service frames (UE DL) being exchanged between a satellite (SAT) and a mobile terminal (UE), said mobile terminal (UE) being adapted for providing 5G communications with the access network, wherein, the mobile terminal (UE) belonging to a 5G cell comprising a cell centre (O), the pre-compensation is calculated and applied on the basis of a main beam directed towards the centre (O) of said 5G cell.
A communication system for 5G communication between at least one mobile terminal (UE) and an access network comprising a plurality of base stations (gNB), said communication system comprising at least one satellite (SAT), at least one base station of the plurality of base stations (gNB) and a gateway (Gate) positioned between said satellite (SAT) and said base station (gNB), said satellite (SAT) and said gateway (Gate) being capable of exchanging feeder link frames (gNB UL, gNB DL), said mobile terminal (UE) and said satellite (SAT) being capable of exchanging service frames (UE UL, UE DL) in a main beam, said satellite (SAT) being at the interface between the feeder link frames (gNB UL, gNB DL) and the service frames (UE UL, UE DL) for the exchange of data between the mobile terminal and the base station (gNB), said service frames (UE UL, UE DL) comprising uplink service frames (UE UL) and downlink service frames (UE DL), said uplink service frames (UE UL) having to be time-aligned with said downlink service frames (UE DL), said communication system comprising a pre-compensation device adapted for compensating time differences for the purpose of time-aligning the uplink service frames (UE UL) and the downlink service frames (UE DL), and wherein, the mobile terminal (UE) belonging to a 5G cell comprising a cell centre (O), the pre-compensation is calculated on the basis of a main beam directed towards the centre (O) of said 5G cell.
Dependencies are inferred from the claim text.