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.

公开(公告)号：US20190149216A1

公开(公告)日：2019-05-16

申请号：US16191628

申请日：2018-11-15

Applicant: Mediatek Inc.

Inventor： Lung-Sheng Tsai ,  Xiu-Sheng Li ,  Ming-Po Chang ,  Weidong Yang

IPC: H04B7/06 ,  H04L5/00 ,  H04W72/04 ,  H04B17/318 ,  H04W76/27

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 up-link control information for channel state information (CSI) acquisition and up-link control information for beam management is to be transmitted on a same up-link channel. The UE includes the up-link control information for beam management in at least one CSI-acquisition report for reporting the up-link control information for CSI acquisition. The UE sends the at least one CSI-acquisition report to the base station on the up-link channel.

公开(公告)号：US10292182B2

公开(公告)日：2019-05-14

申请号：US15432022

申请日：2017-02-14

Applicant: MEDIATEK INC.

Inventor： Weidong Yang ,  Bo-Si Chen ,  Chien-Chang Li ,  Yih-Shen Chen ,  Pavan Santhana Krishna Nuggehalli

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

Abstract: A method of dynamic spectrum sharing mechanism called listen-before-talk (LBT) is proposed for uplink transmission in Licensed Assisted Access (LAA). A maximum channel occupancy time (MCOT) including downlink (DL) transmission from one eNB and uplink (UL) transmission to the same eNB is introduced. A transmission sequence is defined as a number of subframes including possible partial subframes for DL and/or UL within a MCOT. The transmission in the first subframe among the transmission sequence is conducted after a Category 4 LBT. The transmission sequence within the MCOT can be initiated by either a DL transmission or an UL transmission. After the first subframe in a transmission sequence, LBT for another transmission is a fast DL LBT and/or fast UL LBT. Further, a Category 4 LBT can be converted to a short LBT (e.g., one shot CCA) for more efficient channel access.

公开(公告)号：US20190103907A1

公开(公告)日：2019-04-04

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 ,  H04W72/04 ,  H04L5/00 ,  H04W76/27

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：US20190103903A1

公开(公告)日：2019-04-04

申请号：US16149004

申请日：2018-10-01

Applicant: MediaTek Inc.

Inventor： Weidong Yang

IPC: H04B7/0456

Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) generates a codebook comprising a plurality of precoders. The UE processes information using the codebook and transmits the processed information to a network node of a wireless network. In generating the codebook, the UE selects a candidate precoder from a single-stage codebook or a dual-stage codebook and performs a permutation on the candidate precoder.

公开(公告)号：US10251067B2

公开(公告)日：2019-04-02

申请号：US15070191

申请日：2016-03-15

Applicant: MEDIATEK INC.

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

IPC: H04L12/50 ,  H04W16/14 ,  H04W24/00 ,  H04W48/00 ,  H04W72/04 ,  H04W24/10 ,  H04W72/02 ,  H04W74/08

Abstract: Periodic Radio Resource Management (RRM) reporting from user equipments (UEs) is beneficial for a network to efficiently select a carrier with a cleaner channel to serve the UEs. To enable periodic RRM reporting from UEs, periodic beacon signal transmission for UE measurements is necessary. However, in a shared spectrum, precise periodic transmission cannot be guaranteed due to channel contention. A method of transmission with periodic time windows for beacon signal transmission is proposed to resolve potential issues. Under the proposed solution, beacon signal can be transmitted in a certain periodic fashion without frequent physical layer signaling. Furthermore, periodic beacon signal transmission for measurements can be kept with low transmission failure rate due to channel contention.

公开(公告)号：US20190089432A1

公开(公告)日：2019-03-21

申请号：US16136215

申请日：2018-09-19

Applicant: MediaTek Inc.

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

IPC: H04B7/0456 ,  H04B7/0404 ,  H04B7/06 ,  H04L25/02 ,  H04L5/00

CPC classification number: H04B7/0456 ,  H04B7/0404 ,  H04B7/0473 ,  H04B7/0486 ,  H04B7/0639 ,  H04B7/0695 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0091 ,  H04L25/0224 ,  H04L25/03343 ,  H04L25/03891

Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) generates a codebook comprising a plurality of precoders. The UE processes information using the codebook and transmits the processed information to a network node of a wireless network. In generating the codebook, the UE selects a candidate precoder from a single-stage codebook or a dual-stage codebook and performs a permutation on the candidate precoder.

公开(公告)号：US20190028256A1

公开(公告)日：2019-01-24

申请号：US16143837

申请日：2018-09-27

Applicant: Mediatek Inc.

Inventor： Weidong Yang ,  Lung-Sheng Tsai

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

Abstract: A method of wireless communication of a UE is provided. The UE determines a reference size of a payload available in a physical uplink channel for carrying R channel state information (CSI) reports, R being an integer greater than 0, each of the R CSI reports including a first part containing CSI of a wideband and a second part containing CSI of one or more subbands of the wideband. The UE carries all first parts of the R CSI reports in the payload. The UE further carries second parts of (M−1) CSI reports of the R CSI reports in the payload. The UE carries a portion of a second part of an Mth CSI report of the R CSI reports in the payload.

公开(公告)号：US20180368083A1

公开(公告)日：2018-12-20

申请号：US16010431

申请日：2018-06-16

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Lung-Sheng Tsai

IPC: H04W52/52 ,  H04W52/14 ,  H04W52/32

Abstract: Techniques and examples pertaining to uplink (UL) transmission in mobile communications are described. A processor of an apparatus having a plurality of antenna ports controls a plurality of amplifiers each of which corresponding to a respective antenna port of the plurality of antenna ports that correspond to a plurality of antennas. The processor transmits a reference signal to a network via the plurality of antenna ports. The processor also transmits data through a physical uplink shared channel (PUSCH) to the network via the plurality of antenna ports. The processor controls output powers of the plurality of power amplifiers such that, for at least a first antenna of the plurality of antennas, an amount of power used by the first antenna in transmitting the data and another amount of power used by the first antenna in transmitting the reference signal are equal.

公开(公告)号：US20180367346A1

公开(公告)日：2018-12-20

申请号：US16010363

申请日：2018-06-15

Applicant: MediaTek Inc.

Inventor： Bo-Si Chen ,  Weidong Yang

IPC: H04L25/02 ,  H04L5/00 ,  H04L1/00 ,  H04B17/345

Abstract: Various solutions for cross-link interference (CLI) measurement with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a configuration indicating a zero power (ZP) sounding reference signal (SRS) from a transmit/receive point (TRP). The apparatus may receive an SRS from a user equipment (UE). The apparatus may perform CLI measurement according to the SRS from the UE with the ZP SRS from the TRP.