MediaTek. has been granted a patent for a method involving random access channel (RACH) preamble design in non-terrestrial network communications. The method includes initiating a RACH procedure, determining frequency gaps and cover codes, generating a RACH preamble signal, and transmitting it to a network node. GlobalData’s report on MediaTek gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on MediaTek, Adaptive video coding was a key innovation area identified from patents. MediaTek's grant share as of June 2024 was 59%. Grant share is based on the ratio of number of grants to total number of patents.
Rach preamble design for non-terrestrial network communications
The granted patent US12048024B2 outlines a method and apparatus for enhancing the efficiency of random access channel (RACH) procedures in wireless communication networks. The method involves a processor initiating a RACH procedure, determining a frequency domain gap configuration between RACH preamble resources, and generating a RACH preamble signal. This signal is created using a frequency hopping pattern that identifies different physical RACH (PRACH) sequences. A key aspect of the method is the cycling of a cover code across multiple groups of preamble sequences, combined with a fractional frequency offset pattern that is cyclically shifted. The configuration gap can be set to specific values, such as ±3.75 kHz or ±2 times the maximum residual frequency offset, to minimize collisions and correlations between adjacent sequences.
The apparatus described in the patent includes a transceiver for wireless communication with a network node and a processor that executes the aforementioned operations. The processor is responsible for initiating the RACH procedure, determining the frequency gap configuration, and generating and transmitting the RACH preamble signal. Similar to the method, the apparatus also incorporates the cycling of the cover code and the application of a fractional frequency offset pattern to enhance the identification of PRACH sequences. The configuration gap is designed to reduce the likelihood of sequence collisions, thereby improving the overall performance of the RACH process in wireless networks.
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