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:
Dec. 10, 2024
Filed:
Jun. 07, 2021
Apple Inc., Cupertino, CA (US);
Yushu Zhang, Beijing, CN;
Chunxuan Ye, San Diego, CA (US);
Dawei Zhang, Cupertino, CA (US);
Haitong Sun, Cupertino, CA (US);
Hong He, Cupertino, CA (US);
Huaning Niu, Cupertino, CA (US);
Seyed Ali Akbar Fakoorian, San Diego, CA (US);
Sigen Ye, San Diego, CA (US);
Wei Zeng, Cupertino, CA (US);
APPLE INC., Cupertino, CA (US);
Abstract
Systems and methods for beam failure recovery (BFR) are disclosed herein. A user equipment (UE) receives downlink (DL) reference signal(s) on corresponding beam(s) from a base station. The UE performs beam failure detection (BFD) on such beams used for user data to determine whether a beam failure has occurred, and candidate beam detection (CBD) on such beams not used for user data to identify candidate beams for recovering from the beam failure. The BFD and the CBD are based on both uplink (UL) channel performance considerations and DL channel performance considerations, as determined using the DL reference signal(s), such that a beam failure may be determined in the UL, the DL, or both, and a candidate beam may be identified for UL, DL, or both. The UE sends a beam failure recovery request BFRQ with this information to the base station, and the system changes beams accordingly.