公开(公告)号：US10856332B2

公开(公告)日：2020-12-01

申请号：US16016005

申请日：2018-06-22

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Xiu-Sheng Li ,  Chien-Hwa Hwang

IPC: H04W74/08 ,  H04W72/04 ,  H04W36/00 ,  H04L5/00 ,  H04W72/14 ,  H04W48/12

Abstract: A wireless communication method, base station, and user equipment (UE) for physical downlink control channel (PDCCH) in random access channel (RACH) procedure are provided. The UE may include a processor. The processor may obtains a first control resource set (CORESET) configuration for physical downlink control channels (PDCCHs) in the RACH procedure and obtaining a first search space configuration for the PDCCHs in the RACH procedure from a base station to monitor and receive the PDCCHs in the RACH procedure.

公开(公告)号：US10727897B2

公开(公告)日：2020-07-28

申请号：US15674498

申请日：2017-08-10

Applicant: MediaTek Inc.

Inventor： Guo-Hau Gau ,  Ho-Chi Huang ,  Wei-Jen Chen ,  Chiou-Wei Tsai ,  Ju-Ya Chen ,  Mau-Lin Wu

IPC: H04B1/69 ,  H04W72/04 ,  H04L5/00

Abstract: Various novel concepts and schemes pertaining to non-orthogonal multiple access for wireless communications are described. A group orthogonal coded access (GOCA) scheme is introduced to reduce multi-user interference (MUI) and improve performance. A repetition division multiple access (RDMA) scheme is introduced to differentiate user equipment (UEs) by different repetition patterns. A low-density spreading (LDS) scheme is introduced to reduce MUI and improve performance.

公开(公告)号：US10716014B2

公开(公告)日：2020-07-14

申请号：US15935400

申请日：2018-03-26

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Guo-Hau Gau ,  Chia-Hao Yu

IPC: H04W16/28 ,  H04L5/00 ,  H04W72/04 ,  H04W74/08 ,  H04W74/00

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 uses one or more first preambles within a PRACH time-frequency resource to perform a synchronous transmission on the PRACH to the cellular station via the wireless transceiver, or uses one or more second preambles within the PRACH time-frequency resource to perform an asynchronous transmission or a synchronous transmission on the PRACH to the cellular station via the wireless transceiver.

公开(公告)号：US20200053646A1

公开(公告)日：2020-02-13

申请号：US16537537

申请日：2019-08-10

Applicant: MediaTek Inc.

Inventor： Chun-Hsuan Kuo ,  Jiann-Ching Guey ,  Chiou-Wei Tsai ,  Chien-Chang Li ,  Cheng Rung Tsai

IPC: H04W52/02 ,  H04W24/08 ,  H04W72/14 ,  H04W8/00 ,  H04L5/00 ,  H04W74/08

Abstract: Various solutions for wake-up signal and preamble design for mobile communications are described. An apparatus, while in a first mode of operation, receives a wake-up signal (WUS) from a network. In response to receiving the WUS, the apparatus switches to a second mode of operation from the first mode of operation. The apparatus then detects a preamble in downlink (DL) transmissions from the network. In response to detecting the preamble, the apparatus monitors a physical downlink control channel (PDCCH) to check for an uplink (UL) transmission grant for the apparatus from the network.

公开(公告)号：US10555338B2

公开(公告)日：2020-02-04

申请号：US16056296

申请日：2018-08-06

Applicant: MediaTek Inc.

Inventor： Chiou-Wei Tsai

IPC: H04L12/50 ,  H04W74/04 ,  H04W76/27 ,  H04W72/04 ,  H04W72/14 ,  H04W74/08

Abstract: Methods and apparatus are provided to reduce access latency in a random-access channel (RACH) procedure. A user equipment (UE) can transmit multiple Msg1 on multiple RACH transmission occasions before the end of a random-access response (RAR) window. The UE receives one or more RARs in response to the multiple transmitted Msg1. The one or more RARs can be carried in a single RAR window or multiple RAR windows. The UE determines the detected Msg1 based on explicit signals, implicit indications, or both. The explicit signals can be carried in the one or more RARs received by the UE. The implicit indications can be one or more signatures being associated with the multiple RACH transmission occasions. The one or more signatures comprise at least one of physical random-access channel (PRACH) preambles or preamble indices, random-access radio-network temporary identifier (RA-RNTI) values, RAR windows, and control regions for physical downlink control channel (PDCCH).

公开(公告)号：US20180279378A1

公开(公告)日：2018-09-27

申请号：US15933473

申请日：2018-03-23

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Guo-Hau Gau

IPC: H04W74/08 ,  H04W74/00 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W74/0833 ,  H04L5/0005 ,  H04L5/0053 ,  H04W48/10 ,  H04W72/0406 ,  H04W74/002

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 service network. The controller initiates a random access procedure with the service network by controlling the wireless transceiver to perform wireless transmission using at least one of: a random access preamble configured for System Information (SI) request, and a corresponding Physical Random Access Channel (PRACH) time-frequency resource allocated for the random access preamble. Also, the controller receives a random access response, which includes a Random Access Preamble Identifier (RAPID) only and does not include a Timing Advance (TA) command, an uplink grant, and a temporary Cell Radio Network Temporary Identifier (C-RNTI), from the service network via the wireless transceiver.

公开(公告)号：US20180198646A1

公开(公告)日：2018-07-12

申请号：US15861687

申请日：2018-01-04

Applicant: MEDIATEK INC.

Inventor： Guo-Hau Gau ,  Chiou-Wei Tsai

IPC: H04L25/02 ,  H04L5/00

CPC classification number: H04L25/0202 ,  H04J13/0003 ,  H04L5/00 ,  H04L5/0007 ,  H04L25/02 ,  H04W56/00 ,  H04W56/0015 ,  H04W56/005 ,  H04W72/0413

Abstract: A method for data reception of a random access procedure for a network of a wireless communication system is disclosed. The method comprises receiving a preamble and data of the random access procedure in one message, from a user equipment (UE) of the wireless communication system, obtaining timing advance information according to the received preamble, and performing channel estimation according to a DMRS allocated for demodulation of the received data with a timing advance compensation, wherein the timing advance compensation is an operation of a linear phase rotation in a frequency domain based on the timing advance information.

公开(公告)号：US09998241B2

公开(公告)日：2018-06-12

申请号：US14625949

申请日：2015-02-19

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Chia-Sheng Peng ,  Sheng-Hong Yan

IPC: H04B17/13 ,  H03F1/32 ,  H03F1/02

CPC classification number: H04B17/13 ,  H03F1/02 ,  H03F1/32

Abstract: Apparatus and methods are provided to calibrate a closed-loop envelop tracking system for a power amplifier of a wireless transmitter using standardized modulation signals. In one novel aspect, a closed-loop adaptive method is used to track changes in PA nonlinearity due to environmental or circuitry changes during operating condition using standardized modulation signals. In one embodiment, the PA supply voltage compensation lookup table (LUT) and/or the phase compensation LUT is updated during normal operation to sustain good linearity and efficiency performance. In another novel aspect, the PA target response is adjusted in response to changes in PA-related system configuration, such as changes in PA bias settings, and/or indicators measured from the transmitter such as changes in impedance or temperature changes for the RF module or the PA module. The PA supply voltage compensation LUT and/or the phase LUT is updated accordingly upon adjustment of the PA target response.

公开(公告)号：US20180124626A1

公开(公告)日：2018-05-03

申请号：US15802486

申请日：2017-11-03

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Guo-Hau Gau

IPC: H04W24/10 ,  H04W24/06 ,  H04W74/08 ,  H04L25/02

CPC classification number: H04W24/10 ,  H04L25/0202 ,  H04L25/0226 ,  H04W24/06 ,  H04W72/0413 ,  H04W72/0446 ,  H04W74/008 ,  H04W74/0833

Abstract: A method of data transmission in a random access procedure for a UE of a wireless communication system including a network comprises obtaining a resource allocated for data transmission and a resource allocated for preamble transmission with these resources allocated in a frequency division multiplexing (FDM) manner, transmitting a preamble and data in the random access procedure to the network according to the obtained resources, and monitoring a response corresponding to the transmitted preamble and data from the network.

公开(公告)号：US20250142522A1

公开(公告)日：2025-05-01

申请号：US18919716

申请日：2024-10-18

Applicant: Mediatek Inc.

Inventor： Chien-Chun CHENG ,  Chiao-Yao Chuang ,  Wei-De Wu ,  Chiou-Wei Tsai ,  Tai-Cheng Tsai

IPC: H04W64/00 ,  H04B17/318 ,  H04L43/0864 ,  H04W24/10

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a reader. The reader receives a response signal set that responds to a radio signal, from an ambient internet of things (A-IoT) device set, a response signal in the response signal set being modulated by a corresponding A-IoT device in the A-IoT device set to include an identification of the corresponding A-IoT device. The reader identifies the corresponding A-IoT device based on the identification of the corresponding A-IoT device, and performs measurement for a positioning parameter. The reader executes a positioning related operation based on the identified A-IoT device and the measurement for the positioning parameter.