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:
Aug. 05, 2025
Filed:
Mar. 02, 2020
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm, SE;
Abstract
An over the air, OTA, procedure derives a propagation delay (Formula I) of radio signals transmitted between a first radio network node (BS) and a second radio network node (BS) operative in a wireless communication system. Using this propagation delay, a two-step synchronization procedure accurately synchronizes, or time-aligns, antennas at the radio network nodes (BS, BS) for both transmission and reception. In a first step, each radio network node (BS, BS) is accurately calibrated, to obtain a total calibrated delay (Formula II) reflecting the sum of delays through a calibrated receiver path (Formula II) and a calibrated transmitter path (Formula III). In a second step, a pair of radio network nodes (BS, BS) separately align their antenna transmit and receive timings in a procedure in which a first radio network node (BS) is a master and a second radio network node (BS) is a slave.