公开(公告)号：US20180123650A1

公开(公告)日：2018-05-03

申请号：US15802681

申请日：2017-11-03

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Yuanyuan Zhang ,  Ming-Po Chang ,  Guo Hau Gau ,  Jiann-Ching Guey

IPC: H04B7/0408 ,  H01Q25/04 ,  H01Q25/00

CPC classification number: H04B7/0408 ,  H01Q25/002 ,  H01Q25/04 ,  H04B7/0695 ,  H04B7/088 ,  H04W74/006 ,  H04W74/0833

Abstract: Apparatus and methods are provided for initial access in the multi-beam operation. In one novel aspect, the UE receives multiple response messages and selects one message as the response message. In one embodiment, the UE selects a subset of a configured UL resources, transmits a first message, wherein the first message is transmitted one or more times on each of the selected set of UL resources, receives one or more first-message-response messages from the BS, and selects one response message, wherein the selected response message indicates a corresponding BS RX resource, which is used by the UE for subsequent communication with the BS. In one embodiment, the selection of UL resources is at least based on transmitting spatial characteristics of the BS, the UE or both, which indicates whether the BS/UE is reciprocal, partial reciprocal or non-reciprocal.

公开(公告)号：US09876549B2

公开(公告)日：2018-01-23

申请号：US14717144

申请日：2015-05-20

Applicant: MediaTek Inc.

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

IPC: H04B7/06 ,  H04L5/00 ,  H04W16/28 ,  H04W72/08 ,  H04B7/08 ,  H04B7/04 ,  H04B7/0456

CPC classification number: H04B7/061 ,  H04B7/0456 ,  H04B7/0482 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0695 ,  H04B7/088 ,  H04L5/0023 ,  H04W16/28 ,  H04W72/085

Abstract: A communications apparatus includes a wireless communications module and a controller. The wireless communications module uses a preferred receiving beam determined in a beam training procedure to communicate with a network control device and further monitors one or more candidate receiving beam(s) by using the one or more candidate receiving beam(s) to receive signals from the network control device. The controller calculates a detection metric for the preferred receiving beam and the preferred control beam and a detection metric for each combination of the one or more candidate receiving beam(s) and the preferred control beam, and determines whether to change the preferred receiving beam according to the detection metrics for the preferred receiving beam and the preferred control beam and for each combination of the one or more candidate receiving beam(s) and the preferred control beam.

公开(公告)号：US09853707B2

公开(公告)日：2017-12-26

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: H04W72/00 ,  H04B7/06 ,  H04B7/0408 ,  H04L5/00 ,  H04B7/0452

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.

公开(公告)号：US20170367082A1

公开(公告)日：2017-12-21

申请号：US15690657

申请日：2017-08-30

Applicant: Mediatek Inc.

Inventor： Chia-Hao Yu ,  Ming-Po Chang ,  Aimin Justin Sang

IPC: H04W72/04 ,  H04W48/20 ,  H04W16/28

CPC classification number: H04W72/046 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0632 ,  H04L5/0057 ,  H04W16/28 ,  H04W48/20 ,  H04W72/085 ,  H04W88/02 ,  H04W88/08

Abstract: A method of beam misalignment detection for wireless communication system with beamforming is proposed. To identify a misaligned beam, a relative beam quality degradation is applied by comparing a dedicated beam quality with a reference beam quality. The reference beam favors similar transmission path as the dedicated beam, and has better mobility robustness. In one embodiment, the reference beam is an associated control beam of the dedicated beam. To detect beam misalignment, a first dedicated beam SINR is compared with a second associated control beam SINR.

公开(公告)号：US09578644B2

公开(公告)日：2017-02-21

申请号：US14863492

申请日：2015-09-24

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Ming-Po Chang ,  Aimin Justin Sang

IPC: H04M1/00 ,  H04W72/04 ,  H04L5/00 ,  H04W72/08 ,  H04B7/06 ,  H04W88/02 ,  H04W88/08 ,  H04W16/28

CPC classification number: H04W72/046 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0632 ,  H04L5/0057 ,  H04W16/28 ,  H04W48/20 ,  H04W72/085 ,  H04W88/02 ,  H04W88/08

Abstract: A method of beam misalignment detection for wireless communication system with beamforming is proposed. To identify a misaligned beam, a relative beam quality degradation is applied by comparing a dedicated beam quality with a reference beam quality. The reference beam favors similar transmission path as the dedicated beam, and has better mobility robustness. In one embodiment, the reference beam is an associated control beam of the dedicated beam. To detect beam misalignment, a first dedicated beam SINR is compared with a second associated control beam SINR.

Abstract translation: 提出了一种具有波束成形的无线通信系统的波束失准检测方法。 为了识别未对准的光束，通过将专用光束质量与参考光束质量进行比较来应用相对光束质量劣化。 参考光束有利于与专用光束相似的传输路径，并且具有更好的移动性鲁棒性。 在一个实施例中，参考光束是专用光束的相关控制光束。 为了检测光束未对准，将第一专用光束SINR与第二相关联的控制光束SINR进行比较。

公开(公告)号：US20160095003A1

公开(公告)日：2016-03-31

申请号：US14859668

申请日：2015-09-21

Applicant: MEDIATEK INC.

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

IPC: H04W16/28 ,  H04W72/12 ,  H04W52/02 ,  H04W72/04

CPC classification number: H04W16/28 ,  H04B7/0408 ,  H04B7/0695 ,  H04L5/0094 ,  H04W28/08 ,  H04W52/0209 ,  H04W72/0446 ,  H04W72/046 ,  H04W72/12 ,  Y02D70/1262 ,  Y02D70/24 ,  Y02D70/444

Abstract: An incremental scheduling scheme is proposed in a wireless communication system with beamforming. In an initial stage (stage-1), coarse scheduling plan is granted via control beam transmission. In a second stage (stage-2), fine scheduling plan is granted via dedicated beam transmission. Such incremental scheduling scheme provides load balancing for overhead channels on control/dedicated beams via stage-2 scheduling. It utilizes dedicated beam transmission that is more resource efficient and more UE-specific. Furthermore, it provides UE natural power-saving opportunities via stage-1 scheduling.

Abstract translation: 在具有波束成形的无线通信系统中提出了增量调度方案。 在初始阶段（第一阶段），通过控制波束传输授予粗调度计划。 在第二阶段（第二阶段），通过专用波束传输授予精细调度计划。 这种增量调度方案通过阶段2调度为控制/专用波束上的开销信道提供负载平衡。 它利用更多的资源有效率和更多的UE特定的专用波束传输。 此外，它通过第一阶段调度提供UE自然节能的机会。

公开(公告)号：US20160087705A1

公开(公告)日：2016-03-24

申请号：US14723706

申请日：2015-05-28

Applicant: MEDIATEK INC.

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

IPC: H04B7/06 ,  H04W74/00 ,  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 user equipment (UE) receives control beam transmission from a base station using a set of control beams in a beamforming network. Each control beam comprises a set of DL control resource blocks, a set of UL control resource blocks, and an associated set of beamforming weights. The UE selects a control beam for establishing a connection with the base station. The UE then performs random access with the base station using the selected control beam.

Abstract translation: 提出了一种波束成形系统中控制信令的方法。 用户设备（UE）使用波束形成网络中的一组控制波束从基站接收控制波束传输。 每个控制波束包括一组DL控制资源块，一组UL控制资源块和一组相关的波束成形权重。 UE选择用于建立与基站的连接的控制波束。 然后，UE使用所选择的控制波束来执行与基站的随机接入。

公开(公告)号：US11330457B2

公开(公告)日：2022-05-10

申请号：US16043760

申请日：2018-07-24

Applicant: MEDIATEK INC.

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

IPC: H04W24/10 ,  H04L5/00 ,  H04W16/28 ,  H04W72/04 ,  H04W72/08 ,  H04B7/08 ,  H04B7/06

Abstract: A beam indication (BI) mechanism is proposed to provide user equipment (UE) information of network (NW) beam(s) for later transmission. UE can then select its UE beam(s) for the later transmission based on the BI. In one embodiment, NW provides beam management configuration to UE via Radio Resource Control (RRC) signaling, and then provides beam indication index signaling to UE via MAC-CE or DCI. The beam management configuration comprises a mapping table between network beams and configured reference signal (RS) resources. The beam indication index signaling indicates one or more preferred beam pair links (BPLs). Upon triggering a beam management procedure by the network, UE is able to identify the beam management procedure and selects corresponding UE beam(s) based on the beam management configuration and the beam indication index signaling.

公开(公告)号：US10779171B2

公开(公告)日：2020-09-15

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 ,  H04B7/06 ,  H04W76/19 ,  H04B7/08

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：US10674383B2

公开(公告)日：2020-06-02

申请号：US16043718

申请日：2018-07-24

Applicant: MEDIATEK INC.

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

IPC: H04W24/04 ,  H04W72/04 ,  H04W74/08 ,  H04B7/06 ,  H04B7/08 ,  H04W16/28

Abstract: A method of beam failure recovery request (BFRQ) transmission is proposed. In a first step of beam failure detection, UE detects a beam failure condition of the original serving beam. In a second step of new candidate beam identification, UE performs measurements for candidate beam selection. In a third step of beam failure recovery request (BFRQ) transmission, UE transmits a BFRQ message to BS upon the triggering condition for BFRQ transmission is satisfied. In a fourth step of monitoring BS response, UE monitors BS response to decide the success or failure of the BFRQ transmission attempt. In one advantageous aspect, the BFRQ transmission is over dedicated contention-free PRACH or PUCCH resources or over contention-based PRACH resources. Furthermore, a beam failure recovery timer is used to oversee the initiation and the termination of the BFRQ transmission.