公开(公告)号：US20240340655A1

公开(公告)日：2024-10-10

申请号：US18599391

申请日：2024-03-08

Applicant: MEDIATEK INC.

Inventor： TSUNG-WEI CHIANG ,  HSUAN-YI WU ,  Jiann-Ching Guey ,  Chien-Hwa Hwang

IPC: H04W16/28 ,  H04B7/06 ,  H04L5/00 ,  H04W24/08

CPC classification number: H04W16/28 ,  H04B7/0617 ,  H04L5/0051 ,  H04W24/08

Abstract: A user equipment (UE) measures one or more reference signals received from a base station to estimate a set of parameters that characterize a wireless channel between the UE and the base station. The set of parameters includes at least a respective departure angle associated with each path of a plurality of paths of the wireless channel. The UE transmits the set of parameters to the base station to enable the base station to facilitate beamforming strategies to enhance signal quality at the UE based on at least one of a channel matrix and a transmit covariance matrix associated with the wireless channel. The channel matrix and transmit covariance matrix are represented by the set of parameters.

公开(公告)号：US20240178896A1

公开(公告)日：2024-05-30

申请号：US18508148

申请日：2023-11-13

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Jiann-Ching Guey ,  Tzu-Han Chou ,  CHIN-KUO JAO

IPC: H04B7/06

CPC classification number: H04B7/0626 ,  H04B7/0639

Abstract: Method and user equipment (UE) are provided for CSI compression based on multi-dimensional MIO RF signature. In one novel aspect, the UE receives CSI-RS, estimates a basis matrix and a coefficient matrix of a downlink channel matrix based on the at least one CSI-RS, wherein the basis matrix is an N-dimensional non-orthogonal matrix, with N greater than two, and the coefficient matrix is a linear combination coefficient matrix for the basis matrix, and transmits to the network at least one feedback comprising feeding back the basis matrix in a first periodicity and feeding back the coefficient matrix in a second periodicity. In one embodiment, the UE compresses the basis matrix and the coefficient matrix to a feedback basis matrix and a feedback coefficient matrix before transmitting.

公开(公告)号：US11546897B2

公开(公告)日：2023-01-03

申请号：US16823770

申请日：2020-03-19

Applicant: MediaTek Inc.

Inventor： Cheng-Rung Tsai ,  Jiann-Ching Guey

IPC: H04W72/04 ,  H04W74/08

Abstract: A user equipment terminal (UE) operates in a wireless network according to a configuration. The UE receives the configuration for a physical downlink control channel (PDCCH), and detects downlink control information (DCI) in the PDCCH. From the DCI, the UE receives control information for a serving cell configured with one or more bandwidth units in a frequency domain. The control information is provided for each bandwidth unit of the serving cell. According to the control information, the UE performs a downlink reception from the serving cell or an uplink transmission to the serving cell.

公开(公告)号：US11490428B2

公开(公告)日：2022-11-01

申请号：US16368853

申请日：2019-03-29

Applicant: MediaTek Inc.

Inventor： Chiou-Wei Tsai ,  Jiann-Ching Guey ,  Chun-Hsuan Kuo

IPC: H04W74/08 ,  H04L5/00 ,  H04W72/12 ,  H04W74/00

Abstract: Techniques and examples of design for initial access in New Radio (NR) unlicensed spectrum (NR-U) are described. An apparatus receives from a base station of a wireless network which transmits one or multiple synchronization signal and PBCH blocks (SS/PBCH blocks) whose indices are indicated in a cyclic-wrapped order subject to a result of listen-before-talk (LBT) in NR-U. The apparatus also transmits a random access request on random access channel (RACH) resources allocated by the base station.

公开(公告)号：US11258560B2

公开(公告)日：2022-02-22

申请号：US16683108

申请日：2019-11-13

Applicant: MEDIATEK INC.

Inventor： Lung-Sheng Tsai ,  Weidong Yang ,  Jiann-Ching Guey

IPC: H04L27/26 ,  H04W16/02 ,  H04W72/04 ,  H04L5/00 ,  H04B17/336 ,  H04B7/06 ,  H04W24/10

Abstract: In one novel aspect, multiple TRPs information are provided for REG bundle configuration with PDCCH transmission and reception with multiple transmission points (TRPs). The UE configures a PDCCH associated with a CORESET comprising multiple CCEs, partitions the CORESET into multiple CCE groups associated with corresponding TCI-state, which corresponds to a source TRP, configures multiple resource element group (REG) bundles each with multiple resource elements (REs), and assumes the same precoder applied on PDCCH DMRS when the REs are in the same REG bundle and are associated with the same source TRP, and wherein each source TRP transmits corresponding portion of DCI data mapping to the corresponding first and second CCE group. In one embodiment, the REG bundles are predefined with each comprises only REs associated with the same source TRP. In another embodiment, each CCE group corresponding to a source TRP is indicated for the REG bundle configurations.

公开(公告)号：US20210266968A1

公开(公告)日：2021-08-26

申请号：US17315333

申请日：2021-05-09

Applicant: MediaTek Inc.

Inventor： Jiann-Ching Guey ,  Chun-Hsuan Kuo ,  Chien-Hwa Hwang ,  Chiou-Wei Tsai ,  Ming-Po Chang

IPC: H04W74/08 ,  H04W74/00 ,  H04W72/12 ,  H04W24/00 ,  H04W48/16

Abstract: Techniques and examples of efficient detection of a transmission session in New Radio unlicensed spectrum (NR-U) are described. An apparatus (e.g., user equipment (UE)) detects presence of an indication from a base station of a wireless network in an NR-U. The apparatus determines that a transmission opportunity (TXOP) follows the indication responsive to the detecting. The apparatus then receives a downlink (DL) transmission in the NR-U from the base station during the TXOP.

公开(公告)号：US10743321B2

公开(公告)日：2020-08-11

申请号：US16282851

申请日：2019-02-22

Applicant: MEDIATEK INC.

Inventor： Cheng-Rung Tsai ,  Ming-Po Chang ,  Chia-Hao Yu ,  Weidong Yang ,  Jiann-Ching Guey

IPC: H04W72/04 ,  H04W16/28 ,  H04W74/08 ,  H04W76/19 ,  H04B7/08 ,  H04B7/06

Abstract: A method of default uplink beam determination after a beam failure recovery (BFR) procedure in a beamforming system is proposed. For uplink (UL) transmission, the BS provides physical uplink control channel (PUCCH) resource configuration to UE. The configuration includes spatial relation information that indicates the spatial filter to be used by UE for the corresponding PUCCCH transmission. After BFR procedure is completed and before the first spatial relation information indication for a PUCCH resource is received by UE, a default UE TX beam for the PUCCH resource can be determined based on the UE TX beam used during the BFR procedure, e.g., the UE TX beam used to transmit a beam failure recovery request (BFRQ) during the BFR procedure.

公开(公告)号：US20200153572A1

公开(公告)日：2020-05-14

申请号：US16683089

申请日：2019-11-13

Applicant: MEDIATEK INC.

Inventor： Lung-Sheng Tsai ,  Weidong Yang ,  Cheng-Rung Tsai ,  Jiann-Ching Guey ,  Chia-Hao Yu

IPC: H04L5/00 ,  H04L27/26 ,  H04W72/04

Abstract: In one novel aspect, configurations for PDCCH transmission and reception with multiple transmission points are provided. The UE configures a PDCCH associated with a CORSET comprising multiple CCEs, partitions the CORSET into multiple TCI-state sets, wherein each TCI state set includes multiple CCE groups associated with corresponding TCI-state, which corresponds to a source TRP, activates one TCI state set, and receives DCI via the PDCCH, wherein the PDCCH is transmitted from at least the first source TRP and the second source TRP, and wherein each source TRP transmits corresponding portion of DCI data mapping to the corresponding first and second CCE group. The CORSET is partitioned in FDM or TDM way. In another novel aspect, a first and a second PDCCH associated with a first and a second TRP are configured for repetition transmission. The second PDCCH configuration is dependent upon the first PDCCH configuration.

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：US10516465B2

公开(公告)日：2019-12-24

申请号：US16126546

申请日：2018-09-10

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Yuanyuan Zhang ,  Hsuan-Li Lin ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04B7/08 ,  H04W24/10 ,  H04W36/06 ,  H04W72/04 ,  H04W74/08 ,  H04W24/04 ,  H04W16/28

Abstract: A method for harmonized operation between radio link monitor and beam failure recovery is proposed. In one example, upon indication of unsuccessful recovery from beam failure, a counter is initiated to count a configured number of OOS indication before RLF is declared due to beam failure. In another example, upon indication of successful recovery from beam failure, a counter is initiated to count a configured number of IS indication before starting over RLM procedure on its previous observations on failed beams. As a result, either early RLF declaration or RLM reset may be triggered based on BFR procedure to more accurately maintain the link quality.