The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2024
Filed:
Oct. 22, 2021
Centre of Excellence IN Wireless Technology, Chennai, IN;
Indian Institute of Technology Madras (Iit Madras), Chennai, IN;
Abhijeet Abhimanyu Masal, Chennai, IN;
Priyanka Dey, Chennai, IN;
Sunil Kaimalettu, Chennai, IN;
Jeniston Deviraj Klutto Milleth, Chennai, IN;
Bhaskar Ramamurthi, Chennai, IN;
CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, Chennai, IN;
INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS), Chennai, IN;
Abstract
A system and a method for performing uplink (UL) time synchronization in non-terrestrial networks (NTN) include Performing Downlink (DL) synchronization SSB signals. At least one information is received by a UEfrom an NTN BS. A location information of a satellite is obtained using the at least one information received by the UE. Location of the UEis estimated using one of GNSS receiver of the UEand by processing at least one reference signal received by the UEfrom multiple NTN-BS, using at least one multilateration technique and RTK. Timing Advance (TA) estimate is determined using the location of the satellite and location of the UE. TA applied is determined using the TA estimate and TA margin. PRACH is transmitted based on the TA applied and an information related to the TA applied is reported to the NTN-BS. Residual TA is estimated using the reported information related to the TA applied and the detected PRACH. The residual TA is indicated to the UEfor subsequent UL transmissions, in order to achieve the UL time synchronization in the NTN based communication network.