公开(公告)号：US20200296602A1

公开(公告)日：2020-09-17

申请号：US16891885

申请日：2020-06-03

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei TSAI ,  Guo-Hau GAU ,  Chia-Hao YU

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

Abstract: A User Equipment (UE), and associated method, including a wireless transceiver, configured to perform wireless transmission and reception to and from a cellular station. A controller is configured to use a first preamble to perform a synchronous transmission on a PRACH to the cellular station via the wireless transceiver, and use a second preamble to perform either of at least two different types of transmission, the two different types of transmission comprising an asynchronous transmission and a synchronous transmission to the cellular station via the wireless transceiver; wherein the controller is further configured to receive a random access response to the synchronous transmission from the cellular station via the wireless transceiver, and wherein a Timing Advance (TA) estimation is not required for the synchronous transmission.

公开(公告)号：US20180332625A1

公开(公告)日：2018-11-15

申请号：US15977080

申请日：2018-05-11

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei TSAI

IPC: H04W74/08 ,  H04B7/0408

CPC classification number: H04W74/0833 ,  H04B7/0408

Abstract: A UE including a wireless transceiver and a controller is provided. The controller initiate a RACH procedure with the cellular station via the wireless transceiver, and select a Tx beam for a PRACH transmission or a first PRACH retransmission during the RACH procedure according to at least one of the following: a beam correspondence capability indicating whether the UE is able to determine a correspondence between Rx beams and Tx beams of the UE; results of measurements of downlink reference signals; a number of Tx beams of the UE; an estimated path loss to the cellular station; a maximum transmission power of the UE to perform the PRACH transmission or the first PRACH retransmission; a power ramping step configured for the UE to perform the PRACH transmission or the first PRACH retransmission; and a gain of the selected Tx beam.

公开(公告)号：US20180331728A1

公开(公告)日：2018-11-15

申请号：US15977071

申请日：2018-05-11

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei TSAI

IPC: H04B7/0408 ,  H04W24/02 ,  H04W74/08

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 first Physical Random Access Channel (PRACH) resources to perform a first PRACH transmission or retransmission, and switches to use second PRACH resources to perform a second PRACH retransmission subsequent to the first PRACH transmission or retransmission.

公开(公告)号：US20240114487A1

公开(公告)日：2024-04-04

申请号：US18369907

申请日：2023-09-19

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei TSAI ,  Wei-De WU ,  Yi-Chia LO ,  Tien-Shin HO

IPC: H04W72/044

CPC classification number: H04W72/044

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives, in a first slot and from a base station, a first signal that is a downlink data signal in a first frequency resource allocation. The UE communicates, with the base station, a second signal in a second slot. A configured time gap between the first slot and the second slot is according to a comparison of the first frequency resource allocation and a second frequency resource allocation.

公开(公告)号：US20210068166A1

公开(公告)日：2021-03-04

申请号：US17095950

申请日：2020-11-12

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei TSAI ,  Xiu-Sheng LI ,  Chien-Hwa HWANG

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

Abstract: A wireless communication method for a user equipment (UE) includes obtaining, by the UE, a first search space configuration provided by a base station through remaining minimum system information (RMSI) or a handover (HO) command; and monitoring and receiving, by the UE, physical downlink control channels (PDCCHs) in a random access channel (RACH) procedure according to the first search space configuration.

公开(公告)号：US20200053571A1

公开(公告)日：2020-02-13

申请号：US16536576

申请日：2019-08-09

Applicant: Mediatek Inc.

Inventor： Chiou-Wei TSAI ,  Jiann-Ching GUEY ,  Chun-Hsuan KUO ,  Cheng-Rung TSAI

IPC: H04W16/14 ,  H04W74/08

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives, from a base station, one or more downlink reference signals on an unlicensed carrier. The UE determines that the base station occupies the unlicensed carrier for a predetermined first channel occupancy time based on the one or more downlink reference signals. The UE receives, on the unlicensed carrier and in the predetermined first channel occupancy time, a control burst including a plurality of down link control channels. The UE attempts to decode a first down link control channel directed to the UE from the control burst.

公开(公告)号：US20190261423A1

公开(公告)日：2019-08-22

申请号：US16276756

申请日：2019-02-15

Applicant: Mediatek Inc.

Inventor： Chiou-Wei TSAI

IPC: H04W74/08 ,  H04L5/00 ,  H04W24/10 ,  H04L1/00 ,  H04W56/00

Abstract: A UE receives a request from a base station to initiate a random access procedure in a connected state. When a first bandwidth part does not contain any random access resource that is available, the UE: switches to a second bandwidth part that contains one or more random access resources that are available and transmits a preamble sequence at a first random access resource selected from the one or more random access resources that are available. When the first bandwidth part contains the one or more random access resources that are available, the UE transmits the preamble sequence at a second random access resource selected from the one or more random access resources that are available. The second random access resource is at least a second time duration subsequent to the request. The second time duration is shorter than the first time duration.

公开(公告)号：US20240098781A1

公开(公告)日：2024-03-21

申请号：US17766886

申请日：2020-09-30

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei TSAI ,  Timothy Perrin FISHER-JEFFES ,  Chun-Hsuan KUO

IPC: H04W74/08

CPC classification number: H04W74/0808

Abstract: A method executed by a User Equipment (UE) operating in a Frame-Based Equipment (FBE) mode is provided. The method includes the following steps: determining a starting time and a periodicity of a first Fixed Frame Period (FFP) of a cell on an operating channel of an unlicensed band; determining a starting time and a periodicity of a second FFP for initiating an uplink transmission to the cell; performing a Listen-Before-Talk (LBT) procedure on the operating channel of the unlicensed band; and performing the uplink transmission to the cell using a first uplink resource in the second FFP in response to the LBT procedure indicating that the operating channel of the unlicensed band is clear.

公开(公告)号：US20210051485A1

公开(公告)日：2021-02-18

申请号：US16986614

申请日：2020-08-06

Applicant: MEDIATEK INC.

Inventor： Hsuan-Li LIN ,  Chiou-Wei TSAI ,  Tsang-Wei YU

IPC: H04W16/14 ,  H04L5/00 ,  H04W24/08 ,  H04W72/00 ,  H04W56/00 ,  H04W72/08 ,  H04W72/04

Abstract: Aspects of the disclosure provide a method and an apparatus. For example, the apparatus can include receiving circuitry and processing circuitry. The receiving circuitry can be configured to receive from a cell a Q number and one or more SSBs within DRS transmission windows associated with the cell. The processing circuitry can be configured to, for each of the DRS transmission windows, perform a modulo operation on position indexes of the SSB with the Q number to determine SSB beam indexes (SBIs) of the SSBs. A remainder of each of the position indexes is an SBI of one of the SSBs that corresponds to the position index. The processing circuitry can be further configured to combine RRM measurements of the SSBs within the DRS transmission windows based on the SBIs of the SSBs to determine the quality of the cell.

公开(公告)号：US20190313445A1

公开(公告)日：2019-10-10

申请号：US16371446

申请日：2019-04-01

Applicant: Mediatek Inc.

Inventor： Chiou-Wei TSAI

IPC: H04W74/00

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE decodes, based on a first down-link reference signal received from a base station, a first PDCCH indicating a first PDSCH that contains a random access response. The UE decodes, based on the first down-link reference signal, the first PDSCH to obtain the random access message. The UE monitors a second PDCCH in a PDCCH common search space set based on the first down-link reference signal.