公开(公告)号：US20190312660A1

公开(公告)日：2019-10-10

申请号：US16377123

申请日：2019-04-05

Applicant: MediaTek Inc.

Inventor： Chun-Hsuan Kuo ,  Jiann-Ching Guey ,  Chiou-Wei Tsai ,  Ming-Po Chang ,  Cheng-Rung Tsai

IPC: H04J13/16 ,  H04J13/00 ,  H04L1/00 ,  H04W72/04

Abstract: Techniques and examples of channel multiplexing within interlace for New Radio (NR) unlicensed spectrum (NR-U) operation are described. An apparatus (e.g., user equipment (UE)) determines which sub-interlace of multiple sub-interlaces in each of a plurality of interlaces is assigned to the apparatus. The apparatus then performs an uplink (UL) transmission to a wireless network in an NR-U using the assigned sub-interlace in each of the plurality of interlaces. Each of the plurality of interlaces may be divided into respective multiple sub-interlaces with channel multiplexing.

公开(公告)号：US20190268961A1

公开(公告)日：2019-08-29

申请号：US16282821

申请日：2019-02-22

Applicant: MEDIATEK INC.

Inventor： Cheng-Rung Tsai ,  Ming-Po Chang ,  Chia-Hao Yu ,  Weidong Yang ,  Jiann-Ching Guey

IPC: H04W76/19 ,  H04W74/08 ,  H04W16/28

Abstract: A method of default uplink beam determination after radio resource control (RRC) connection reestablishment in a beamforming system is proposed. For uplink (UL) transmission, the BS provides dedicated physical uplink control channel (PUCCH) resource configuration to UE. The configuration includes spatial relation information that indicates the spatial domain transmission filter to be used by UE for the corresponding PUCCH transmission. After RRC connection re-establishment and before a dedicated PUCCH configuration is received, a default UE TX beam can be determined based on the UE TX beam used during the RRC connection re-establishment procedure, e.g., the UE TX beam used to transmit MSG3 in a four-step random-access channel (RACH) procedure triggered by the RRC connection re-establishment procedure.

公开(公告)号：US20190268893A1

公开(公告)日：2019-08-29

申请号：US16282851

申请日：2019-02-22

Applicant: MEDIATEK INC.

Inventor： Cheng-Rung Tsai ,  Ming-Po Chang ,  Chia-Hao Yu ,  Weidong Yang ,  Jiann-Ching Guey

IPC: H04W72/04 ,  H04W16/28 ,  H04W74/08

Abstract: A method of default uplink beam determination after a beam failure recovery (BFR) procedure in a beamforming system is proposed. For uplink (UL) transmission, the BS provides physical uplink control channel (PUCCH) resource configuration to UE. The configuration includes spatial relation information that indicates the spatial filter to be used by UE for the corresponding PUCCCH transmission. After BFR procedure is completed and before the first spatial relation information indication for a PUCCH resource is received by UE, a default UE TX beam for the PUCCH resource can be determined based on the UE TX beam used during the BFR procedure, e.g., the UE TX beam used to transmit a beam failure recovery request (BFRQ) during the BFR procedure.

公开(公告)号：US20190103908A1

公开(公告)日：2019-04-04

申请号：US16145855

申请日：2018-09-28

Applicant: MEDIATEK INC.

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

IPC: H04B7/08 ,  H04W24/10 ,  H04W72/04 ,  H04B7/06

Abstract: A method of uplink beam indication for uplink transmission in a beamforming network is proposed. After entering connected mode, both downlink and uplink have a default beam pair link (BPL). Based on uplink beam management, the network establishes mapping between uplink beam indication states and reference signal (RS) resources. The network then signals the uplink beam indication states mapping to UE. UE performs subsequent uplink transmission based on the uplink beam indication, where UE determines its TX beams by mapping from RS resources to corresponding UE TX beams. The uplink beam indication is updated whenever a mapping between a beam indication state to a UE TX beam is changed.

公开(公告)号：US20190082335A1

公开(公告)日：2019-03-14

申请号：US16127481

申请日：2018-09-11

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Ming-Po Chang ,  Chiou-Wei Tsai ,  Chien-Hwa Hwang ,  Jiann-Ching Guey

IPC: H04W24/04 ,  H04W74/08 ,  H04W16/28

Abstract: A method of beam failure recovery request (BFRQ) transmission is proposed. UE can search for UE-specific control channel in a search space that is signaled specifically for monitoring network response of the BFRQ. Furthermore, configurations indicated specifically for BFRQ can be carried by dedicated signaling such as high-layer radio resource control (RRC) signaling. After successfully rebuilding connection, UE assumes the demodulation reference signal (DMRS) ports of UE-specific control channel to be spatially quasi-co-located (QCL-ed) with the reference signals identified during the beam failure recovery procedure.

公开(公告)号：US20190068263A1

公开(公告)日：2019-02-28

申请号：US16108765

申请日：2018-08-22

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Weidong Yang ,  Ming-Po Chang ,  Cheng-Rung Tsai ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04L5/00 ,  H04W72/04 ,  H04W24/10 ,  H04W16/28

Abstract: A method of configuring different uplink beam management (UL BM) procedures is proposed. Different UL BM procedures are defined such that UE knows how to transmit the configured uplink reference signal (UL RS) over UL RS resource groups to BS. A first UL BM procedure enables UE to transmit with sweeping TX beams and enables BS to measure with sweeping RX beams (U-1 procedure). A second UL BM procedure enables UE to transmit UL RS on a number of UL resources with a fixed UE TX beam (U-2 procedure). A third UL BM procedure enables UE to transmit UL RS on a number of UL resources with different UE TX beams (U-3 procedure).

公开(公告)号：US20190068262A1

公开(公告)日：2019-02-28

申请号：US16108738

申请日：2018-08-22

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Weidong Yang ,  Ming-Po Chang ,  Cheng-Rung Tsai ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04B7/0456 ,  H04W72/04 ,  H04L5/00 ,  H04W16/28

Abstract: A method of antenna capability signaling and group-based reference signal resource configuration is proposed. A User Equipment (UE) provides its antenna capability signaling to BS to facilitate the UL beam training. From UE perspective, different antenna structures can be assumed and different beamforming mechanisms can be achieved based on the antenna structures. When BS determines multiple UL beam pair links (BPLs), BS needs to know the UE antenna capability information. In a preferred embodiment, group-based UL RS resources are configured for UL beam determination based on the UE antenna capability signaling, which helps BS to learn the UE beamforming constraints as well as UL beamformed channels corresponding to the UL BPLs.

公开(公告)号：US20170332249A1

公开(公告)日：2017-11-16

申请号：US15589052

申请日：2017-05-08

Applicant: MEDIATEK INC.

Inventor： Jiann-Ching Guey ,  Ming-Po Chang ,  Ju-Ya Chen

IPC: H04W16/28 ,  H04B7/06 ,  H04W72/04 ,  H04W84/04

CPC classification number: H04W16/28 ,  H04B7/0617 ,  H04B7/084 ,  H04W72/046 ,  H04W84/042

Abstract: A method of steering beam direction and shaping beamwidth of a directional beam using a phased antenna array in a beamforming cellular system is proposed. The N antenna elements of the phased antenna array are applied with a set of combined beam coefficients to steer the direction of the beam and to shape the beamwidth to a desired width. Specifically, in addition to the original constant phase shift values, additional phase modulations are applied to expand the beam to a desirable width. The phased antenna array applied with the combined beam coefficients involve only phase shift, no amplitude modulation is needed and thereby increasing beamforming gain and efficiency.

公开(公告)号：US09698884B2

公开(公告)日：2017-07-04

申请号：US14723689

申请日：2015-05-28

Applicant: MEDIATEK INC.

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

IPC: H04B7/06 ,  H04W74/08 ,  H04W72/04

CPC classification number: H04B7/0617 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0053 ,  H04W72/046 ,  H04W74/0833

Abstract: A method of control signaling in a beamforming system is proposed. A base station allocates a first sets of DL control resource blocks for DL transmission to a plurality of user equipments (UEs) in a beamforming network. Each set of DL control resource blocks is associated with a corresponding set of beamforming weights. The base station also allocates a second sets of UL control resource blocks for UL transmission from the UEs. Each set of UL control resource blocks is associated with the same corresponding set of beamforming weights. The base station transmits cell and beam identification information using a set of control beams. Each control beam comprises a set of DL control resource block, a set of UL control resource block, and the corresponding set of beamforming weights.

公开(公告)号：US20160080060A1

公开(公告)日：2016-03-17

申请号：US14854344

申请日：2015-09-15

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Ming-Po Chang ,  Ju-ya Chen ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04W72/04 ,  H04W72/08 ,  H04L5/00

CPC classification number: H04B7/0626 ,  H04B7/0408 ,  H04B7/0452 ,  H04B7/0695 ,  H04L5/0023 ,  H04L5/0051 ,  H04L5/0053

Abstract: A method of providing channel station information in a beamforming system is proposed. Reference Signal (RS) is used for channel state estimation. For fine-resolution dedicated beam with smaller spatial coverage, additional channel monitoring of coarse-resolution beams for beam fallback is applied. The joint coverage of monitored fallback beams covers a desired service area. For beam administration, fallback beams need to be evaluated and the most preferable beam is selected for use in case the currently used dedicated beam is no longer suitable. For link adaptation, at least the channel state of the selected fallback beam is evaluated and provided to a scheduler (e.g., a BS) for adapting the transmission of the selected fallback beam.

Abstract translation: 提出了一种在波束成形系统中提供信道站信息的方法。 参考信号（RS）用于信道状态估计。 对于具有较小空间覆盖的精细分辨率专用光束，应用用于光束后退的粗分辨率光束的附加通道监视。 受监视的后备光束的联合覆盖覆盖了所需的服务区域。 对于光束管理，需要评估回退光束，并且最优选的光束被选择用于当前使用的专用光束不再适用的情况。 对于链路自适应，至少所选择的回退波束的信道状态被评估并提供给调度器（例如，BS），以调整所选择的后备波束的传输。