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:
Apr. 14, 2026
Filed:
Dec. 27, 2022
Guangdong Oppo Mobile Telecommunications Corp., Ltd., Guangdong, CN;
Li Guo, Allen, TX (US);
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan, CN;
Abstract
Methods and systems for starting a contention-based random-access channel (RACH) upon detecting beam failure of a serving cell. The method includes transmitting a medium access control (MAC) control element (CE), signaling the beam failure of the serving cell in a message of the contention-based RACH. The method further includes determining completion of the contention-based RACH based on receipt of a physical downlink control channel (PDCCH); and after receiving one or more of the last symbols of the PDCCH, determining a default transmission (Tx) beam for each resource of a physical uplink control channel (PUCCH) that includes a PUCCH spatial relation information parameter.