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.

Date of Patent:
Jul. 07, 2020

Filed:

Mar. 26, 2018
Applicant:

Mediatek Inc., Hsin-Chu, TW;

Inventors:

Chiou-Wei Tsai, Hsinchu, TW;

Guo-Hau Gau, Hsinchu, TW;

Chia-Hao Yu, Hsinchu, TW;

Assignee:

MEDIATEK INC., Hsin-Chu, TW;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 16/28 (2009.01); H04L 5/00 (2006.01); H04W 74/08 (2009.01); H04W 72/04 (2009.01); H04W 74/00 (2009.01);
U.S. Cl.
CPC ...
H04W 16/28 (2013.01); H04L 5/005 (2013.01); H04L 5/0048 (2013.01); H04L 5/0055 (2013.01); H04W 72/046 (2013.01); H04W 74/0833 (2013.01); H04L 5/0023 (2013.01); H04W 74/006 (2013.01);
Abstract

A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a cellular station. The controller selects a downlink reference signal associated with a candidate beam among a plurality of downlink reference signals including Channel State Information-Reference Signal (CSI-RS) resources, Synchronization Signal (SS) blocks, or Physical Broadcast Channel (PBCH) blocks, and determines one from a plurality sets of Physical Random Access Channel (PRACH) preambles and RACH occasions for the selected downlink reference signal according to an association configured between the downlink reference signals and PRACH resources. Also, the controller uses the determined set of PRACH preamble and RACH occasion to perform a PRACH transmission to the cellular station via the wireless transceiver.


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