公开(公告)号：US20230111205A1

公开(公告)日：2023-04-13

申请号：US17944289

申请日：2022-09-14

Applicant: Mediatek Inc.

Inventor： Lung-Sheng Tsai

IPC: H04B7/06

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 determines that reference signals are transmitted from L antenna ports of a base station on reference time-frequency resources. The UE receives first RF signals at Nr1 physical antennas on first time-frequency resources. The first RF signals carries the reference signals. Nr1 and L are positive integers. Nr1 is less than L. The UE receives second RF signals at Nr2 physical antennas on second time-frequency resources. The second RF signals carries the reference signals. Nr2 is a positive integer and less than L. The UE obtains channel state measurements corresponding to the reference signals based on baseband signals derived from the first RF signals and the second RF signals. The UE generates a CSI report based on the channel state measurements.

公开(公告)号：US11563467B2

公开(公告)日：2023-01-24

申请号：US17394384

申请日：2021-08-04

Applicant: MediaTek Inc.

Inventor： Lung-Sheng Tsai ,  Jiann-Ching Guey

IPC: H04B7/02 ,  H04B7/0417 ,  H04W24/08 ,  H04B7/06 ,  H04B7/0456

Abstract: Examples pertaining to precoding-matched channel state information (CSI) feedback in mobile communications are described. An apparatus (e.g., UE) beamforms one or more of a plurality of ports used in reception of a channel state information reference signal (CSI-RS) with one or more precoders that are applied on one or more of the plurality of ports used in reception of a demodulation reference signal (DMRS) or a physical downlink shared channel (PDSCH). The apparatus generates a CSI feedback comprising at least a plurality of channel quality indication (CQIs) with respect to a plurality of hypothesized ranks. The apparatus then transmits the CSI feedback to a network.

公开(公告)号：US20230018093A1

公开(公告)日：2023-01-19

申请号：US17946513

申请日：2022-09-16

Applicant: MediaTek INC.

Inventor： Yi-Ju Liao ,  Wei-De Wu ,  Lung-Sheng Tsai ,  Yi-Chia Lo

IPC: H04W76/28 ,  H04W72/12

Abstract: A method for Downlink Control Information (DCI)-based Physical Downlink Control Channel (PDCCH) monitoring adaptation is proposed. A User Equipment (UE) performs a Discontinuous Reception (DRX) operation. The UE detects a UE-specific DCI format during the DRX operation, wherein the UE-specific DCI format includes a bit field that indicates an adaptation on PDCCH monitoring. The UE adjusts a PDCCH monitoring periodicity in a DRX active time of the DRX operation according to the bit field.

公开(公告)号：US20210037502A1

公开(公告)日：2021-02-04

申请号：US16916270

申请日：2020-06-30

Applicant: Mediatek Inc.

Inventor： Lung-Sheng Tsai ,  Chien-Hwa Hwang ,  Yi-Ju Liao

IPC: H04W72/02 ,  H04W72/12

Abstract: A UE determines N1 component carriers on each of which the UE is configured to detect a respective one PDCCH in a slot. The UE determines N2 component carriers on each of which the UE is configured to detect respective at least two PDCCHs in the slot. The UE determines a total Q blind detections of PDCCH that the UE is capable of performing. The UE determines a first predetermined scaling factor X. The UE allocates M1 blind detections of the Q blind detections to be available on each of the N1 component carriers and M2 blind detections of the Q blind detections to be available on each of the N2 component carriers such that (N1*M1+N2*M2) is a largest integer no greater than Q. M2 equals to X*M1. The UE performs blind detections in accordance with the allocations.

公开(公告)号：US10855416B2

公开(公告)日：2020-12-01

申请号：US16190301

申请日：2018-11-14

Applicant: Mediatek Inc.

Inventor： Lung-Sheng Tsai ,  Xiu-Sheng Li ,  Weidong Yang ,  Wei-De Wu

IPC: H04L5/00 ,  H04W72/10 ,  H04W72/04

Abstract: A method of wireless communication of a UE is provided. The UE determines K1 information bits carrying one or more CSI reports, the one or more reports including a first CSI report, K1 being an integer greater than 0. The UE selects K2 information bits from the K1 information bits, the K2 information bits excluding a part of information bits of the first CSI report, K2 being an integer greater than 0 and smaller than K1. The UE determines that the K2 information bits are in a first predetermined relationship with a threshold. The UE transmits E2 encoded bits derived from the K2 information bits in a physical up-link channel to a base station, E2 being an integer greater than 0.

公开(公告)号：US20200350968A1

公开(公告)日：2020-11-05

申请号：US16861675

申请日：2020-04-29

Applicant: Mediatek Inc.

Inventor： Lung-Sheng Tsai ,  Weidong Yang

IPC: H04B7/06 ,  H04W24/10 ,  H04L1/00 ,  H04L5/00 ,  H04W72/04

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 monitors a respective down link control channel (DCCH) from each of a plurality of transmission and reception points (TRPs). The UE receives, from a first TRP of the plurality of TRPs, a first trigger for reporting N1 channel state information (CSI) reports within a time duration, N1 being an integer greater than 0. The UE commits to update the N1 CSI reports. The UE determines that P processing units are remaining available for calculation of CSI reports while the UE is calculating the N1 CSI reports. P is a number greater than or equal to zero. Each of the P processing units indicates a predetermined amount of computing power of the UE.

公开(公告)号：US20200266961A1

公开(公告)日：2020-08-20

申请号：US16789611

申请日：2020-02-13

Applicant: Mediatek Inc.

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

IPC: H04L5/00 ,  H04W88/06 ,  H04W88/10

Abstract: A UE receives a bandwidth part switch command from a first TRP, the bandwidth part switch command instructing the UE to switch from communicating on a first bandwidth part to communicating on a second bandwidth part. The UE (a) determines to accept the bandwidth part switch command based on a priority level of the first TRP among the plurality of TRPs or (b) informs other TRPs of the plurality of TRPs. The UE switches from communicating on the first bandwidth part to communicating on the second bandwidth part. A first TRP determines whether the first TRP is a primary TRP instructing to switch from communicating on a first bandwidth part to communicating on a second bandwidth part. The first TRP communicates with the UE via the first TRP on either the first bandwidth part or the second bandwidth part, when the first TRP is the primary TRP.

公开(公告)号：US10742360B2

公开(公告)日：2020-08-11

申请号：US15952661

申请日：2018-04-13

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Lung-Sheng Tsai ,  Tzu-Han Chou ,  Yu-Chuan Lin ,  Bo-Si Chen

IPC: H04L1/18 ,  H04B7/04 ,  H04L1/16 ,  H04B7/06 ,  H04W72/04 ,  H04B7/0456

Abstract: Techniques and examples of layer mapping, channel state information (CSI) feedback and hybrid automatic repeat request (HARQ) feedback in mobile communications are described. A user equipment (UE) receives from a base station one or more reference signals, which may be non-zero power (NZP) or zero power (ZP), on one or more time-frequency resources indicated by a network via a communication link between the UE and the base station. The UE estimates, based on the receiving, a subspace spanned by a channel response of an interfering signal. The UE determines a precoding matrix indicator (PMI) based on the estimated subspace. The UE transmits to the base station a channel state information (CSI) feedback comprising at least the PMI. The PMI may include at least a first precoder and a second precoder.

公开(公告)号：US20190393979A1

公开(公告)日：2019-12-26

申请号：US16446886

申请日：2019-06-20

Applicant: Mediatek Inc.

Inventor： Lung-Sheng Tsai ,  Teemu Tapio Virtanen

IPC: H04L1/00 ,  H04W24/10 ,  H04W72/04 ,  H04W76/11

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 a first trigger indicating at least one trigger state for reporting channel state information on a carrier or multiple carriers. The UE generates respective one or more channel state information reports associated with each of the at least one trigger state, each of the respective one or more channel state information reports being generated in accordance with a respective set of configurations that are unique with respect to sets of configurations used to generate the rest of the respective one or more channel state information reports. The UE sends the respective one or more channel state information reports associated with each of the at least one trigger state.

公开(公告)号：US10298311B2

公开(公告)日：2019-05-21

申请号：US15969747

申请日：2018-05-02

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Lung-Sheng Tsai ,  Chien-Yi Wang ,  Chiao-Yao Chuang ,  Kuhn-Chang Lin

IPC: H04B7/06 ,  H04B7/0452 ,  H04L25/02 ,  H04B7/0417

Abstract: Techniques and examples of overhead reduction for linear combination codebook and feedback mechanism in mobile communications are described. A user equipment (UE) receives from a base station of a network one or more reference signals via a communication link between the UE and the base station. The UE constructs a channel state information (CSI) feedback by utilizing a correlation of channel responses in a frequency domain to reduce feedback overhead. The UE then transmits the CSI feedback to the base station.