公开(公告)号：US20180227899A1

公开(公告)日：2018-08-09

申请号：US15888250

申请日：2018-02-05

Applicant: MEDIATEK INC.

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

IPC: H04W72/04 ,  H04W74/08 ,  H04B17/318

Abstract: A method of beam failure recovery for multi-beam operation in wireless communication systems with beamforming is proposed. Specifically, a four-step beam failure recovery procedure is proposed. In a first step of beam failure detection, UE detects a beam failure condition of the original serving beam pair link. 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 beam failure recovery.

公开(公告)号：US20180227786A1

公开(公告)日：2018-08-09

申请号：US15888315

申请日：2018-02-05

Applicant: MEDIATEK INC.

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

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

Abstract: A method of beam reciprocity state reporting and uplink beam management in wireless communication systems with beamforming is proposed. In one novel aspect, a BS configures one or more resource sets to a UE for uplink beam management. The one or more resource sets are allocated for UE to transmit UL reference signals using a number of UE beams. The number of UE beams to be trained is reported by the UE, e.g., via a “UE beam reciprocity state (update)” message. The BS also indicates whether a fixed UE TX beam or which UE TX beam is used for transmission, or indicates whether different UE TX beams are used for transmission of different resources in a resource set. The BS then feedback measurement results for UE to choose a proper TX beam.

公开(公告)号：US09775156B2

公开(公告)日：2017-09-26

申请号：US15405075

申请日：2017-01-12

Applicant: MEDIATEK INC.

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

IPC: H04M1/00 ,  H04W72/04 ,  H04W16/28 ,  H04W48/20

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：US09680547B2

公开(公告)日：2017-06-13

申请号：US14706098

申请日：2015-05-07

Applicant: MediaTek Inc.

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

IPC: H04B7/06 ,  H04W72/00 ,  H04W4/06 ,  H01Q3/26 ,  H01Q1/24 ,  H04B7/0452 ,  H04B7/0456

CPC classification number: H04B7/0617 ,  H01Q1/246 ,  H01Q3/26 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0695 ,  H04B7/0697 ,  H04W4/06 ,  H04W72/005

Abstract: A network control device. A wireless communications module receives a plurality of first signals each including information regarding a preferred transmitting beam in a first beam level determined by a communications apparatus. A controller selects a group of communications apparatuses to join a 1-to-many beam training according to the received first signals and selects one or more transmitting beams in a second beam level to be trained. The communications apparatuses in the group have the same preferred transmitting beam in the first beam level and the transmitting beam(s) in the second beam level associates with the preferred transmitting beam in the first beam level. The wireless communications module further uses the transmitting beam(s) in turn to transmit signals to perform the 1-to-many beam training for training the transmitting beam(s) in the second beam level among the group of communications apparatuses at the same time.

公开(公告)号：US20160087704A1

公开(公告)日：2016-03-24

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 ,  H04W74/00 ,  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.

Abstract translation: 提出了一种波束成形系统中控制信令的方法。 基站向波束形成网络中的多个用户设备（UE）分配用于DL传输的第一组DL控制资源块。 每组DL控制资源块与相应的一组波束赋形权重相关联。 基站还从UE分配UL传输的第二组UL控制资源块。 每组UL控制资源块与相同的对应的波束赋形权重组相关联。 基站使用一组控制波束来发送小区和波束识别信息。 每个控制波束包括一组DL控制资源块，一组UL控制资源块和相应的一组波束成形权重。

公开(公告)号：US20210266968A1

公开(公告)日：2021-08-26

申请号：US17315333

申请日：2021-05-09

Applicant: MediaTek Inc.

Inventor： Jiann-Ching Guey ,  Chun-Hsuan Kuo ,  Chien-Hwa Hwang ,  Chiou-Wei Tsai ,  Ming-Po Chang

IPC: H04W74/08 ,  H04W74/00 ,  H04W72/12 ,  H04W24/00 ,  H04W48/16

Abstract: Techniques and examples of efficient detection of a transmission session in New Radio unlicensed spectrum (NR-U) are described. An apparatus (e.g., user equipment (UE)) detects presence of an indication from a base station of a wireless network in an NR-U. The apparatus determines that a transmission opportunity (TXOP) follows the indication responsive to the detecting. The apparatus then receives a downlink (DL) transmission in the NR-U from the base station during the TXOP.

公开(公告)号：US10743321B2

公开(公告)日：2020-08-11

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 ,  H04W76/19 ,  H04B7/08 ,  H04B7/06

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：US10271223B2

公开(公告)日：2019-04-23

申请号：US15674675

申请日：2017-08-11

Applicant: MEDIATEK INC.

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

IPC: H04B7/06 ,  H04B7/08 ,  H04B7/0426 ,  H04W16/28 ,  H04W72/08

Abstract: Aspects of the disclosure provide a method for beam management at a base station (BS) in a wireless communication system. The method can include transmitting a beam training reference signal (RS) resource configuration from a base station (BS) to a user equipment (UE) in a wireless communication system, transmitting an anchor association index indicating an association between a beam pair link and a set of second transmit beams of the BS, wherein the beam pair link is formed by a first transmit beam of the BS and a receive beam of the UE, transmitting beam training RSs according to the beam training RS resource configuration on the set of second transmit beams, and receiving a measurement report including quality measurements of beamformed channels over the receive beam and a subset of the second transmit beams.

公开(公告)号：US20190037426A1

公开(公告)日：2019-01-31

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 ,  H04W72/04 ,  H04W72/08 ,  H04W16/28

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：US20190037423A1

公开(公告)日：2019-01-31

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 ,  H04W74/08 ,  H04W72/04

CPC classification number: H04W24/04 ,  H04B7/06 ,  H04B7/0695 ,  H04B7/088 ,  H04W16/28 ,  H04W72/0413 ,  H04W74/0833

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.