公开(公告)号：US10707939B2

公开(公告)日：2020-07-07

申请号：US16149339

申请日：2018-10-02

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Tzu-Han Chou ,  Chao-Cheng Su ,  Lung-Sheng Tsai ,  Bo-Si Chen

IPC: H04B7/06 ,  H04W76/27 ,  H04L5/00 ,  H04W72/04 ,  H04B7/0456 ,  H04L25/03 ,  H04B7/0404

Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) stores information with respect to a plurality of permutations with respect to a mapping between a plurality of sounding reference signal (SRS) resources and a plurality of antenna ports at the UE. The UE receives signaling from a network node of a wireless network. The signaling contains an index identifying a permutation among the plurality of permutations. The UE performs an uplink transmission of data to the network node using one or more SRS resources of the plurality of SRS resources and one or more antenna ports of the plurality of antenna ports according to the identified permutation.

公开(公告)号：US10523290B2

公开(公告)日：2019-12-31

申请号：US16129774

申请日：2018-09-12

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Lung-Sheng Tsai ,  Bo-Si Chen

IPC: H04B7/0456 ,  H04B7/0404 ,  H04B7/04

Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) constructs a precoder to be used to wirelessly communicate with a network node of a wireless network. The UE then performs an uplink (UL) transmission to the network node using the precoder via one or more of a plurality of antennas of the UE.

公开(公告)号：US10440697B2

公开(公告)日：2019-10-08

申请号：US15852143

申请日：2017-12-22

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Bo-Si Chen ,  Chien-Chang Li

IPC: H04W72/04 ,  H04W4/70 ,  H04L5/00

Abstract: Various solutions for coordination information transmission with respect to user equipment (UE) and network apparatus in mobile communications are described. A UE may receive downlink control information comprising coordination information from a first node of a wireless network. The coordination information may comprise interference management information. The UE may copy the coordination information and embed the coordination information in uplink control information. The UE may further transmit the uplink control information to a second node of the wireless network.

公开(公告)号：US20190081667A1

公开(公告)日：2019-03-14

申请号：US16129772

申请日：2018-09-12

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Lung-Sheng Tsai ,  Bo-Si Chen

IPC: H04B7/0456

Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) receives a signal indicating codebook subset restriction (CBSR) from a network node of a wireless network. The UE selects one or more codewords or a codebook from a master codebook based on the CBSR. The master codebook includes codewords from multiple components. The UE then performs a physical uplink shared channel (PUSCH) transmission to the network node using the one or more codewords or the codebook.

公开(公告)号：US20180323916A1

公开(公告)日：2018-11-08

申请号：US15970881

申请日：2018-05-04

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Bo-Si Chen

IPC: H04L1/24 ,  H04L5/00

CPC classification number: H04L1/248 ,  H04L5/0048 ,  H04L5/0053 ,  H04W24/10 ,  H04W52/0203

Abstract: Various solutions for cross-link interference measurements with respect to user equipment and network apparatus in mobile communications are described. A node of a wireless network may receive a cross-link interference (CLI) measurement configuration. The node may determine a measurement slot according to the CLI measurement configuration. The node may determine whether to perform a CLI measurement in the measurement slot according to the CLI measurement configuration. The node may receive a CLI reference signal (RS) in the measurement slot. The node may perform the CLI measurement in the measurement slot.

公开(公告)号：US20180302192A1

公开(公告)日：2018-10-18

申请号：US15952661

申请日：2018-04-13

Applicant: Steven Yen-Hsien Liu ,  MediaTek Inc.

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

IPC: H04L1/18 ,  H04B7/04 ,  H04B7/06

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：US20180270835A1

公开(公告)日：2018-09-20

申请号：US15923326

申请日：2018-03-16

Applicant: Mediatek Inc.

Inventor： Bo-Si Chen ,  Weidong Yang ,  Chien-Chang Li

IPC: H04W72/08 ,  H04W72/04

CPC classification number: H04W72/082 ,  H04W72/0446 ,  H04W72/10

Abstract: A first base station on a first cell determines to communicate in a first direction with one or more UEs on the first cell in a first time slot and a second time slot, the first time slot and the second time slot being consecutive, the one or more UEs including a first UE. The first base station further determines that communication with the first UE on the first cell in the first direction interferes with communication between a second base station and a second UE on a second cell in a second direction. Communication in the second direction having a priority higher that a priority of communication in the first direction. The first base station determines, in the first time slot, to communicate with the one or more UEs on the first cell in the second direction in the second time slot.

公开(公告)号：US20170331606A1

公开(公告)日：2017-11-16

申请号：US15593091

申请日：2017-05-11

Applicant: MEDIATEK INC.

Inventor： Bo-Si Chen ,  Chien-Chang Li ,  Weidong Yang ,  Yih-Shen Chen

IPC: H04L5/00 ,  H04W72/04 ,  H04W76/04

CPC classification number: H04L5/0048 ,  H04L5/0007 ,  H04L5/0091 ,  H04L27/0006 ,  H04W76/27

Abstract: A method of supporting uplink aperiodic sounding reference signal (SRS) transmission in licensed assisted access (LAA) wireless communication networks is provided. In one novel aspect, a base station can configure each UE with a group ID by RRC signaling, and then use DCI to signal the group to transmit SRS in the corresponding SC-FDMA symbol. A new cell specific RNTI is introduced for the group DCI. In a first embodiment, the DCI comprises a list of group IDs, each indicating a group ID for SRS transmission in the corresponding SC-FDMA symbol in the UpPTS. In a second embodiment, the DCI comprises a number of SC-FDMA symbols in the UpPTS and an offset value of the group ID for SRS transmission. The proposed method can trigger different groups of UEs in multiple SC-FDMA symbols in a flexible way.

公开(公告)号：US20170302493A1

公开(公告)日：2017-10-19

申请号：US15474125

申请日：2017-03-30

Applicant: MEDIATEK INC.

Inventor： Weidong Yang ,  Chien-Chang Li ,  Bo-Si Chen ,  Yih-Shen Chen

IPC: H04L27/26 ,  H04W72/04 ,  H04W48/16 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04L27/2666 ,  H04L1/0029 ,  H04L1/0031 ,  H04L1/0038 ,  H04L1/1819 ,  H04L1/1822 ,  H04L1/1896 ,  H04L5/0007 ,  H04W48/16 ,  H04W72/0413 ,  H04W72/0473

Abstract: A flexible and efficient physical downlink control channel (PDCCH) signaling scheme that schedules physical uplink shared channel (PUSCH) transmission over multiple subframes with Hybrid Automatic Retransmission (HARQ) support is proposed. The PDCCH has a downlink control information (DCI) format that schedules PUSCH transmission over multiple subframes. The PUSCH transmission is associated with multiple HARQ processes with non-consecutive HARQ process IDs. Furthermore, the DCI format uses joint signaling to combine HARQ process indexes, new data indication (NDI), and redundancy version (RV) to reduce signaling overhead.

公开(公告)号：US10420135B2

公开(公告)日：2019-09-17

申请号：US15474094

申请日：2017-03-30

Applicant: MEDIATEK INC.

Inventor： Weidong Yang ,  Chien-Chang Li ,  Bo-Si Chen ,  Yih-Shen Chen

IPC: H04W72/12 ,  H04L5/00 ,  H04W56/00 ,  H04W72/04 ,  H04W74/08

Abstract: A physical random access channel (PRACH) waveform design to satisfy the requirements on the occupied channel bandwidth in eLAA wireless communications network is provided. In one alternative, PRACH comprises multiple segments in the time/frequency domain in one subframe. In another alternative, PRACH comprises multiple segments in the time/frequency domain across two or more subframes by using inter-subframe hopping. In one advantageous aspect, PDCCH triggers the dynamic allocation of the PRACH resource to facilitate the listen-before-talk (LBT) channel access procedure in unlicensed carriers. The aperiodic and dynamic allocation of PRACH resource improves efficiency and PRACH success rate.