MUMBAI, India, Oct. 11 -- Intellectual Property India has published a patent application (202518091105 A) filed by Apple Inc., Cupertino, U.S.A., on Sept. 23, for 'rach procedures for non-terrestrial networks for base station.'
Inventor(s) include Yao, Chunhai; Ye, Chunxuan; Zhang, Dawei; Zeng, Wei; Sun, Haitong; Ye, Sigen; Yang, Weidong; Oteri, Oghenekome; He, Hong; Zhang, Yushu; Vangala, Sarma; and Hu, Haijing.
The application for the patent was published on Oct. 10, under issue no. 41/2025.
According to the abstract released by the Intellectual Property India: "Methods and systems to enhance NR RACH procedure to accommodate nonterrestrial networks (NTN) 5 are disclosed. The length of the RAR window may be extended. In one aspect, a gNB of the NTN may perform blind retransmissions of the RAR message scheduled by DCI within the RAR window to user equipment to improve transmission reliability of the RAR message for NTN. The number of blind retransmission and the transmission pattern may depend on the PRACH reception 10 condition, an uplink channel condition, or may be pre-configured. In one aspect, the gNB may extend the K1 value and K2 value that determine the delays between uplink and downlink transmissions to align the time domain duplex (TDD) uplinkdownlink configuration due to the long propagation delays associated with the NTN. In one aspect, the gNB may broadcast or multicast RAR window size 15 extension values to the UEs based on the orbital altitude of the satellites."
The patent application was internationally filed on Aug. 05, 2020, under International application No.PCT/CN2020/107242.
Disclaimer: Curated by HT Syndication.
