US 12,442,933 B2
GNSS data in non-terrestrial network system information
Magnus Åström, Lund (SE); Olof Liberg, Enschede (SE); Sebastian Euler, Storvreta (SE); and Jonas Sedin, Sollentuna (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/917,775
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
PCT Filed Mar. 29, 2021, PCT No. PCT/IB2021/052588
§ 371(c)(1), (2) Date Oct. 7, 2022,
PCT Pub. No. WO2021/205283, PCT Pub. Date Oct. 14, 2021.
Claims priority of provisional application 63/007,808, filed on Apr. 9, 2020.
Prior Publication US 2023/0134701 A1, May 4, 2023
Int. Cl. G01S 19/25 (2010.01); G01S 19/28 (2010.01)
CPC G01S 19/254 (2013.01) [G01S 19/28 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method performed by a wireless device, the method comprising:
receiving Assisted-Global Navigation Satellite System (A-GNSS) information, the A-GNSS information received in system information broadcast by a network via a Third Generation Partnership Project (3GPP) wireless signal;
receiving signals from a set of GNSS satellites, the set of GNSS satellites comprising at least three GNSS satellites;
determining how long the A-GNSS information is valid;
determining a location of the wireless device using the A-GNSS information and information received in the signals from the set of GNSS satellites, wherein the A-GNSS information is used while the A-GNSS information is valid;
determining Doppler time and frequency offsets compared to a network satellite, the Doppler time and frequency offsets determined based on the location of the wireless device; and
initiating a connection process with the network satellite by transmitting a random access signal with pre-compensated time and frequency, the pre-compensated time and frequency based on the determined Doppler time and frequency offsets.