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:
Jul. 08, 2025
Filed:
Aug. 05, 2020
Apple Inc., Cupertino, CA (US);
Chunxuan Ye, Cupertino, CA (US);
Dawei Zhang, Cupertino, CA (US);
Haitong Sun, Cupertino, CA (US);
Sigen Ye, Cupertino, CA (US);
Weidong Yang, Cupertino, CA (US);
Oghenekome Oteri, Cupertino, CA (US);
Hong He, Cupertino, CA (US);
Yushu Zhang, Cupertino, CA (US);
Sarma V. Vangala, Cupertino, CA (US);
Haijing Hu, Cupertino, CA (US);
Chunhai Yao, Beijing, CN;
Wei Zeng, Cupertino, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Methods and systems to enhance NR RACH procedure to accommodate non-terrestrial networks (NTN) are disclosed. The length of the RAR window may be extended. A NTN-RNTI associated with the time-frequency resources used for the PRACH preamble may be used to scramble the CRC of DCI used for downlink assignment in the RAR. The DCI content may include information on the associated PRACH preamble to assist the UE in distinguishing between RARs generated as a response to PRACH preambles transmitted by different UEs from different system frames. The NTN-RNTI may contain information on the system frames when the UE sends the PRACH preamble. The RA-RNTI associated with the time-frequency resources used for the PRACH preambles transmitted from different frames may be used to scramble different subsets of the CRC of the DCI format 1_0 to assist the UE in distinguishing between RARs generated in response to the different PRACH preambles.