公开(公告)号：US20250038921A1

公开(公告)日：2025-01-30

申请号：US18918047

申请日：2024-10-16

Applicant: MEDIATEK INC.

Inventor： Chien-Yi Wang ,  Jiann-Ching Guey

IPC: H04L5/00

Abstract: A method of downlink channel state information (DL CSI) computation and reporting is proposed to support high velocity in new radio (NR) systems. In a first novel aspect, two CSI reference slots are defined. CSI reference slot for CSI measurement is defined for determining which CSI-RS/SSB occasion(s) is used for computing CSI. CSI reference slot for CSI computation is defined for determining the slot where UE assumes the CSI computation should be based upon the channel at that time onwards. In a second novel aspect, UE can be configured with a CSI computation period consisting of one or N slots and can be divided into multiple sub-periods without overlap. UE can be configured to compute and report wideband CSI and subband CSI for the whole CSI computation period and/or for each sub-period.

公开(公告)号：US20230007659A1

公开(公告)日：2023-01-05

申请号：US17825424

申请日：2022-05-26

Applicant: MEDIATEK INC.

Inventor： Chien-Yi Wang ,  Jiann-Ching Guey

IPC: H04W72/08 ,  H04W72/04 ,  H04L5/00 ,  H04L1/08

Abstract: A method of providing channel state information (CSI) reference signal (RS) configuration is proposed to support high velocity in new radio (NR) systems. A CSI-RS resource can be configured with a bursty period in which the same CSI-RS resource is repeatedly transmitted over time. Any two repetitions of the CSI-RS resource are not overlapped in time. For periodic and semi-persistent CSI-RS, the repetitions of CSI-RS in the bursty period can be signalled by radio resource control (RRC) signaling. For aperiodic CSI-RS, the CSI-RS repetitions in the bursty period can be indicated by the triggering downlink control information (DCI). UE can acquire Doppler-domain information based on the CSI-RS repetition to facilitate high velocity scenarios in 5G NR systems.

公开(公告)号：US11528592B2

公开(公告)日：2022-12-13

申请号：US16983160

申请日：2020-08-03

Applicant: MEDIATEK INC.

Inventor： Yung-Liang Tsou ,  Hao-Chen Chou ,  Szu-Chieh Chiu ,  Chien-Yi Wang ,  Rohit Naik

IPC: H04W36/00 ,  H04W8/12 ,  H04W48/00 ,  H04W36/32 ,  H04W76/30

Abstract: A method for robust moving between a roaming Third Generation Partnership Project (3GPP) network and a non-3GPP network is provided. The method includes the steps of: connecting with a home 3GPP network over one of a roaming 3GPP network and a non-3GPP network by a User Equipment (UE); performing a first initial attach procedure with the home 3GPP network over the other of the roaming 3GPP network and the non-3GPP network by the UE in response to the UE moving from the one of the roaming 3GPP network and the non-3GPP network to the other of the roaming 3GPP network and the non-3GPP network; and keeping the connection over the one of the roaming 3GPP network and the non-3GPP network by the UE during the first initial attach procedure over the other of the roaming 3GPP network and the non-3GPP network.

公开(公告)号：US20210051654A1

公开(公告)日：2021-02-18

申请号：US16927158

申请日：2020-07-13

Applicant: MediaTek Inc.

Inventor： Chien-Yi Wang ,  Ju-Ya Chen

IPC: H04W72/04 ,  H04W72/12 ,  H04W4/40 ,  H04L1/18

Abstract: Various solutions for resource selection of multiple transmission occasions in new radio (NR) sidelink communications with respect to user equipment and network apparatus in mobile communications are described. An apparatus may select a first transmission resource from a resource selection window. The apparatus may determine a maximum time gap and a minimum time gap. The apparatus may select a second transmission resource according to the maximum time gap and the minimum time gap. The apparatus may inform the first transmission resource and the second transmission resource to a peer apparatus.

公开(公告)号：US10897792B2

公开(公告)日：2021-01-19

申请号：US16584943

申请日：2019-09-27

Applicant: MediaTek Inc.

Inventor： Ju-Ya Chen ,  Chien-Yi Wang ,  Ahmet Umut Ugurlu

IPC: H04W84/20 ,  H04W4/40 ,  H04W72/04 ,  H04W24/10 ,  H04W88/02

Abstract: Various examples and schemes pertaining to methods and apparatus of a New Radio (NR) vehicle-to-everything (V2X) cluster head are described. An apparatus implemented as a source user equipment (UE) determines whether there is a need to either join a cluster or become a cluster head in an NR V2X communication environment. The apparatus also detects whether there is any existing cluster head in the NR V2X communication environment responsive to determining that there is the need. The apparatus then determines whether to join a first cluster associated with a first cluster head responsive to the first cluster head being detected as an existing cluster head in the NR V2X communication environment.

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.

公开(公告)号：US12273295B2

公开(公告)日：2025-04-08

申请号：US17427174

申请日：2019-09-25

Applicant: MEDIATEK INC.

Inventor： Chien-Yi Wang ,  Ju-Ya Chen ,  Tao Chen

IPC: H04W72/0446 ,  H04L1/00 ,  H04L5/00 ,  H04W4/40 ,  H04W28/26 ,  H04W72/02 ,  H04W72/0453 ,  H04W72/20

Abstract: A receive (Rx) UE performs blind detection to decode a first-stage Sidelink Control Information (SCI) in a received signal. The first-stage SCI contains control information for the Rx UE to locate time-and-frequency resources used by a transmit (Tx) UE. The time-and-frequency resources are used to transmit the first-stage SCI and a second-stage SCI via a Physical Sidelink Control Channel (PSCCH) and to transmit data via a Physical Sidelink Shared Channel (PSSCH) associated with the PSCCH. The Rx UE locates the second-stage SCI in the time-and-frequency resources based on the first-stage SCI. The second-stage SCI contains additional control information from the Tx UE to the Rx UE for the sidelink V2X communication. The Rx UE decodes the second-stage SCI using at least in part an identifier which identifies the Rx UE as a destination of the received signal.

公开(公告)号：US12267710B2

公开(公告)日：2025-04-01

申请号：US17752825

申请日：2022-05-24

Applicant: MEDIATEK INC.

Inventor： Chien-Yi Wang ,  Jiann-Ching Guey

IPC: H04W24/08 ,  H04L1/00 ,  H04L5/00

Abstract: A method of downlink channel state information (DL CSI) computation and reporting is proposed to support high velocity in new radio (NR) systems. In a first novel aspect, two CSI reference slots are defined. CSI reference slot for CSI measurement is defined for determining which CSI-RS/SSB occasion(s) is used for computing CSI. CSI reference slot for CSI computation is defined for determining the slot where UE assumes the CSI computation should be based upon the channel at that time onwards. In a second novel aspect, UE can be configured with a CSI computation period consisting of one or N slots and can be divided into multiple sub-periods without overlap. UE can be configured to compute and report wideband CSI and subband CSI for the whole CSI computation period and/or for each sub-period.

公开(公告)号：US11985576B2

公开(公告)日：2024-05-14

申请号：US17859117

申请日：2022-07-07

Applicant: MediaTek Inc.

Inventor： Chien-Yi Wang ,  Ju-Ya Chen

IPC: H04W4/40 ,  H04W72/044

CPC classification number: H04W4/40 ,  H04W72/044

Abstract: For sidelink vehicle-to-everything (V2X) transmission, a first user equipment (UE) obtains time-and-frequency resources that are bounded by two subchannel boundaries and two slot boundaries. The first UE transmits encoded control information to a second UE in a Physical Sidelink Control Channel (PSCCH) that occupies a first portion of the time-and-frequency resources starting from a lowest resource block (RB) in a lowest subchannel and from an earliest symbol available for sidelink control and data transmission. The first UE further transmits encoded data to the second UE in a Physical Sidelink Shared Channel (PSSCH) that occupies a second portion of the time-frequency resources. The second portion includes (a) a first set of RBs in the same symbols as the PSCCH and not used by the PSCCH, and (b) a second set of RBs in symbols not used by the PSCCH.

公开(公告)号：US11432117B2

公开(公告)日：2022-08-30

申请号：US16521515

申请日：2019-07-24

Applicant: MediaTek Inc.

Inventor： Chien-Yi Wang ,  Ju-Ya Chen

IPC: H04W4/40 ,  H04W72/04

Abstract: Sidelink vehicle-to-everything (V2X) transmission is performed over a Physical Sidelink Control Channel (PSCCH) and a Physical Sidelink Shared Channel (PSSCH). Encoded control information is transmitted in the PSCCH and encoded data is transmitted in the PSSCH. The PSCCH uses a first portion of the time-and-frequency resources, and the PSSCH uses and a second portion of the time-and-frequency resources. A first part of the PSSCH uses a first set of time resources overlapping with the PSCCH and a first set of frequency resources non-overlapping with the PSCCH. A second part of the PSSCH uses a second set of time resources non-overlapping with the PSCCH and a second set of frequency resources overlapping with the PSCCH.