US 12,174,303 B2
Methods for indication of reference station GNSS RTK integer ambiguity level
Fredrik Gunnarsson, Linköping (SE); Sara Modarres Razavi, Stockholm (SE); and Ritesh Shreevastav, Upplands Väsby (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/765,192
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Oct. 2, 2020, PCT No. PCT/IB2020/059291
§ 371(c)(1), (2) Date Mar. 30, 2022,
PCT Pub. No. WO2021/064690, PCT Pub. Date Apr. 8, 2021.
Claims priority of provisional application 62/910,131, filed on Oct. 3, 2019.
Prior Publication US 2023/0003908 A1, Jan. 5, 2023
Int. Cl. G01S 19/44 (2010.01); G01S 5/00 (2006.01); G01S 19/06 (2010.01)
CPC G01S 19/44 (2013.01) [G01S 5/0018 (2013.01); G01S 19/06 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A location node configured to communicate with a wireless device, the location node comprising:
processing circuitry configured to:
receive spatial information, the spatial information indicating the wireless device is monitoring a system information broadcast in a spatial region associated with a cell identifier;
determine the wireless device relationship between a first reference station and a second reference station based at least in part on the spatial information;
compare a first integer ambiguity level of the first reference station with a second integer ambiguity level of the second reference station, the second reference station corresponding to a current reference station of the wireless device; and
transmit an indication of an applicability of the first integer ambiguity level of the first reference station to the second integer ambiguity level of the second reference station for position estimation, the indication being based on the comparison of the first integer ambiguity level with the second integer ambiguity level.