公开(公告)号：US20220231740A1

公开(公告)日：2022-07-21

申请号：US17555437

申请日：2021-12-18

Applicant: MEDIATEK Inc.

Inventor： Sandeep Bhat ,  Chin-Kuo Jao ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04J1/06

Abstract: A method of downlink channel state information (DL CSI) measurement and reporting is proposed in FR1 frequency division duplex (FDD) systems. CSI reference signal (CSI-RS) is directed towards dominant spatial domain (SD, beam) and frequency domain (FD, delay) components in the propagation environment. By partial channel reciprocity, angles and delays in the DL channel can be obtained by UL channel measurement. UE only needs to measure and feedback the DL CSI corresponding to the dominant angles and delays. BS obtains the precoder in the antenna-frequency domain using the CSI feedback in the beam-delay domain. BS uses the precoder for transmission over Physical downlink shared channel (PDSCH). In one embodiment, UE reconstructs the DL channel on a multitude of delays using the DL channel estimated on a few beamformed CSI-RS and delay tap indices signaled from the network.

公开(公告)号：US20220060233A1

公开(公告)日：2022-02-24

申请号：US17391252

申请日：2021-08-02

Applicant: MediaTek Inc.

Inventor： Lung-Sheng Tsai ,  Jiann-Ching Guey ,  Tzu-Han Chou

IPC: H04B7/06 ,  H04L5/00 ,  H04L27/26

Abstract: Examples pertaining to reference signal sharing in mobile communications are described. An apparatus (e.g., UE) receives a plurality of reference signals comprising a first set of reference signals and a second set of reference signals. The apparatus performs time or frequency tracking based on the plurality of reference signals. Alternatively, the apparatus generates a channel state information (CSI) report associated with the plurality of reference signals and transmits the CSI report to a network.

公开(公告)号：US11201711B2

公开(公告)日：2021-12-14

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 ,  H04B17/336 ,  H04B7/06 ,  H04W24/10

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：US20210051498A1

公开(公告)日：2021-02-18

申请号：US16930673

申请日：2020-07-16

Applicant: Mediatek Inc.

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

IPC: H04W24/08 ,  H04W16/14 ,  H04L5/00 ,  H04W72/04 ,  H04L27/26

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, through a non-physical layer signaling, a configuration indicating to receive a first reference signal in a set of OFDM symbols in a first slot. The UE attempts to detect a physical layer signaling in the first slot or in a second slot prior to the first slot. The UE refrains from conducting measurements of the first reference signal, when the physical layer signaling is detected by the UE and includes a first indication.

公开(公告)号：US20200228299A1

公开(公告)日：2020-07-16

申请号：US16738120

申请日：2020-01-09

Applicant: Mediatek Inc.

Inventor： Tzu-Han Chou ,  Weidong Yang ,  Chao-Cheng Su ,  Jiann-Ching Guey

IPC: H04L5/10 ,  H04L5/00 ,  H04L27/26 ,  H04L27/34

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 an indication for transmitting a particular DMRS sequence in an uplink transmission. The particular DMRS sequence is time domain based. The UE determines an adjustment to a base DMRS sequence for generating the particular DMRS sequence. The UE generates the particular DMRS sequence based on the adjustment and the base DMRS sequence. The UE modulates the particular DMRS sequence to obtain a set of symbols. The UE maps a plurality of symbols of the set of symbols to a plurality of subcarriers. The UE transmits the plurality of symbols on the plurality of subcarriers.

公开(公告)号：US10716127B2

公开(公告)日：2020-07-14

申请号：US16136220

申请日：2018-09-19

Applicant: MediaTek Inc.

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

IPC: H04W72/12 ,  H04L1/00 ,  H04W56/00 ,  H04W72/04 ,  H04W76/27 ,  H04W72/14 ,  H04L1/18 ,  H04W24/10 ,  H04B7/06

Abstract: Various solutions with respect to uplink control information (UCI) feedback timing signaling in wireless communications are described. A user equipment (UE) identifies a type of uplink (UL) transmission to perform with respect to a network node of a wireless network. The UE receives a control signal from the network node and determines, based on the control signal, a timing offset of a transmission schedule for the identified type of the UL transmission. The UE performs the UL transmission to the network node according to the transmission schedule such that a first type of the UL transmission is performed with a first timing offset and a second type of the UL transmission is performed with a second timing offset different than the first timing offset.

公开(公告)号：US10389558B2

公开(公告)日：2019-08-20

申请号：US15616277

申请日：2017-06-07

Applicant: MEDIATEK INC.

Inventor： Jiann-Ching Guey ,  Chun-Hsuan Kuo ,  Chao-Cheng Su

IPC: H04L5/00 ,  H04L12/26 ,  H04L25/49 ,  H04L27/18 ,  H04L27/26

Abstract: Aspects of the disclosure provide an apparatus that includes a baseband processing circuit and a transmitting circuit. The baseband processing circuit is configured to encode a reference signal based on a specific sequence to generate a digital stream. The specific sequence has non-zero values at selected positions, and the number of coincidences of non-zero value positions between the specific sequence and a shifted copy of the specific sequence is smaller than a threshold. The transmitting circuit is configured to transmit wireless signals in response to the digital stream.

公开(公告)号：US20190253904A1

公开(公告)日：2019-08-15

申请号：US16260922

申请日：2019-01-29

Applicant: MEDIATEK INC.

Inventor： Cheng-Rung Tsai ,  Chia-Hao Yu ,  Jiann-Ching Guey

IPC: H04W24/08 ,  H04W16/14 ,  H04W72/04 ,  H04W80/02 ,  H04W76/27

CPC classification number: H04W24/08 ,  H04L5/001 ,  H04W16/14 ,  H04W72/0446 ,  H04W72/046 ,  H04W76/27 ,  H04W80/02

Abstract: Aspects of the disclosure provide a method for reception of simultaneously transmitted downlink channels having different spatial quasi-co-location (sQCL) assumptions. The method can include receiving a configuration specifying a control resource set (CORESET) monitoring occasion of a first physical downlink control channel (PDCCH) at a user equipment (UE), receiving a second PDCCH scheduling or activating transmission of a physical downlink shared channel (PDSCH) at the UE, determining whether the PDSCH overlaps the first PDCCH in time domain, determining whether a first spatial quasi-co-location (sQCL) assumption for reception of the first PDCCH and a second sQCL assumption for reception of the PDSCH are different, and prioritizing the reception of the first PDCCH when the PDSCH overlaps the first PDCCH in time domain and the first and second sQCL assumptions are different.

公开(公告)号：US20190014576A1

公开(公告)日：2019-01-10

申请号：US16127533

申请日：2018-09-11

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Tao Chen ,  Jiann-Ching Guey

IPC: H04W72/04 ,  H04L1/18 ,  H04L27/26

Abstract: A flexible radio frame structure for both FDD and TDD is proposed. Under the flexible frame structure, each radio frame consists of a plurality of slots, and each slot within a radio frame has a flexible slot type. As a basic scheduling unit, each slot can be configured by the base station via physical layer signaling. The slot type can be changed dynamically based on current system needs to support different DL/UL ratios and latency requirements. With the support of different slot types and asynchronous DL/UL HARQ operation, HARQ operation for DL/UL can share the same HARQ timing to simplify the system design and reduce implementation complexity.

公开(公告)号：US20180368152A1

公开(公告)日：2018-12-20

申请号：US16006925

申请日：2018-06-13

Applicant: MEDIATEK INC.

Inventor： Hsuan-Li Lin ,  Ming-Po Chang ,  Chia-Hao Yu ,  Jiann-Ching Guey

IPC: H04W72/08 ,  H04J3/16 ,  H04L5/00

Abstract: A method of configuring and applying UE beam training gaps for simultaneous UE beam training and data reception in a beamforming wireless communication system is proposed. UE beam training gaps are configured by the base station for each UE. Typically, UE-specific data transmission can take place during the serving control beam time region. The UE beam training gaps are periods where UE-specific data transmission does not happen within the serving control beam time region. During each UE beam training gap, non-serving UE beam training can take place, where the UE performs intra-frequency reference signal measurements from serving and/or neighbor cells using various non-serving UE beams. The UE beam training gaps are configured and signaled to each UE, and each individual UE can have different data occupancy region within its serving CB time region.