公开(公告)号：US10516465B2

公开(公告)日：2019-12-24

申请号：US16126546

申请日：2018-09-10

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Yuanyuan Zhang ,  Hsuan-Li Lin ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04B7/08 ,  H04W24/10 ,  H04W36/06 ,  H04W72/04 ,  H04W74/08 ,  H04W24/04 ,  H04W16/28

Abstract: A method for harmonized operation between radio link monitor and beam failure recovery is proposed. In one example, upon indication of unsuccessful recovery from beam failure, a counter is initiated to count a configured number of OOS indication before RLF is declared due to beam failure. In another example, upon indication of successful recovery from beam failure, a counter is initiated to count a configured number of IS indication before starting over RLM procedure on its previous observations on failed beams. As a result, either early RLF declaration or RLM reset may be triggered based on BFR procedure to more accurately maintain the link quality.

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.

公开(公告)号：US20180227772A1

公开(公告)日：2018-08-09

申请号：US15888299

申请日：2018-02-05

Applicant: MEDIATEK INC.

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

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

CPC classification number: H04W16/28 ,  H04B7/0617 ,  H04B7/0619 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0091 ,  H04W24/10 ,  H04W72/04 ,  H04W72/046 ,  H04W76/27 ,  H04W88/02 ,  H04W88/08

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 UE determines its UE beam reciprocity state and sends a “UE beam reciprocity state” message to a BS, which triggers proper uplink beam management accordingly. The UE beam reciprocity state message can take place when UE tries to register to the network. For example, according to factory setting, UE reports at least “Positive” or “Negative” in this message. Beam reciprocity state can be updated by a “UE beam reciprocity state update” message. An auxiliary information can be transmitted to the BS for UL beam management if UE reports “Negative” for beam reciprocity state. The auxiliary information indicates the uncertainty level of UE beams.

公开(公告)号：US10020921B2

公开(公告)日：2018-07-10

申请号：US15157423

申请日：2016-05-18

Applicant: National Taiwan University ,  MediaTek Inc.

Inventor： Hung-Yu Wei ,  Chung-Wei Weng ,  Chia-Hao Yu

IPC: H04W4/00 ,  H04L5/00 ,  H04B17/309 ,  H04W4/02 ,  H04W16/28 ,  H04W72/04 ,  H04W52/24

CPC classification number: H04L5/0048 ,  H04B17/309 ,  H04W16/28 ,  H04W52/242 ,  H04W72/0446

Abstract: The disclosure is directed to a method of transmitting a reference signal and related electronic devices using the same. In one of the exemplary embodiments, the method would include not limited to transmitting a reference signal by using a directional antenna emitting a first radiation pattern of one or more beams covering 360 N degrees per one of N time slots during a first phase of a full sweeping period, wherein N≥2 and transmitting the reference signal, in response to transmitting the reference signal by using the directional antenna which has the first radiation pattern, by using the directional antenna emitting a second radiation pattern of multiple beams having different angles simultaneously covering a total of 360 M degrees of angles per one of M time slots during a second phase of the full sweeping period, wherein N>M≥1.

公开(公告)号：US10009072B2

公开(公告)日：2018-06-26

申请号：US15345752

申请日：2016-11-08

Applicant: MEDIATEK INC.

Inventor： Aimin Justin Sang ,  Chia-Hao Yu ,  Yuanyuan Zhang ,  Jiann-Ching Guey

IPC: H04L1/02 ,  H04B7/0408 ,  H04B7/06 ,  H04J4/00 ,  H04J13/00 ,  H04L1/00 ,  H04W72/04 ,  H04W36/00

CPC classification number: H04B7/0408 ,  H04B7/0619 ,  H04B7/0695 ,  H04B7/0697 ,  H04J4/00 ,  H04J13/00 ,  H04L1/0003 ,  H04W36/0055 ,  H04W36/0079 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/046

Abstract: A method of providing spatial diversity for critical data delivery in a beamformed mmWave smallcell is proposed. The proposed spatial diversity scheme offers duplicate or incremental data/signal transmission and reception by using multiple different beams for the same source and destination. The proposed spatial diversity scheme can be combined with other diversity schemes in time, frequency, and code, etc. for the same purpose. In addition, the proposed spatial diversity scheme combines the physical-layer resources associated with the beams with other resources of the same or different protocol layers. By spatial signaling repetition to avoid Radio Link Failure (RLF) and Handover Failure (HOF), mobility robustness can be enhanced. Mission-critical and/or time-critical data delivery can also be achieved without relying on retransmission.

公开(公告)号：US09954590B2

公开(公告)日：2018-04-24

申请号：US14938103

申请日：2015-11-11

Applicant: MediaTek Inc.

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

IPC: H04L12/26 ,  H04B7/06 ,  H04W16/28 ,  H04B7/08 ,  H04L5/00 ,  H04W72/12 ,  H04B7/0456

CPC classification number: H04B7/061 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/088 ,  H04L1/0084 ,  H04L5/0023 ,  H04W16/28 ,  H04W72/1289

Abstract: A network control device includes a wireless communications module and a controller. The wireless communications module uses a preferred transmitting beam to communicate with a communications apparatus in one or more downlink opportunities corresponding to the preferred transmitting beam. The controller schedules signal or data to be transmitted in at least one downlink opportunity corresponding to the preferred transmitting beam. When scheduling signal or data to be transmitted, the controller further provides at least one training gap, in which the controller does not schedule any dedicated data to the communications apparatus, in the downlink opportunity corresponding to the preferred transmitting beam.

公开(公告)号：US20170127400A1

公开(公告)日：2017-05-04

申请号：US15405075

申请日：2017-01-12

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：US20170054534A1

公开(公告)日：2017-02-23

申请号：US15345720

申请日：2016-11-08

Applicant: MEDIATEK INC.

Inventor： Aimin Justin Sang ,  Chia-Hao Yu ,  Yuanyuan Zhang ,  Jiann-Ching Guey

IPC: H04L5/00 ,  H04W72/08 ,  H04W36/00 ,  H04W72/04

CPC classification number: H04L5/0032 ,  H04B7/024 ,  H04B7/0408 ,  H04L5/005 ,  H04W36/0088 ,  H04W72/046 ,  H04W72/048 ,  H04W72/082 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/164 ,  Y02D70/442 ,  Y02D70/444

Abstract: Inter-cell coordination and beam-aware scanning with end-to-end UE-BS signaling enhancements for robust HO trigger in a beamforming mmWave network is proposed. From the network and the base station perspective, inter-BS control beam coordination is performed, coupled with neighbor-cell information advertisement to facilitate UE-side beam-aware scanning. Inter-BS CB coordination enables a variety of network planning, pre-determined or random, enhanced with UE-reports and dynamic re-coordination to minimize inter-cell interference. From UE perspective, by utilizing the advertised CB information, UE can learn serving cell and neighbor cell CB pattern for beam-aware scanning. Beam-aware scanning enables power saving fast scanning at the UE with beam-aware HO measurement of neighboring and target cells, which reduces HO latency and avoids unnecessary HO.

Abstract translation: 提出了在波束成形mmWave网络中用于鲁棒HO触发的端到端UE-BS信令增强的小区间协调和波束感知扫描。 从网络和基站的角度来看，执行BS间控制波束协调，并与邻居小区信息通告相结合，便于UE侧波束感知扫描。 BS间协调使得能够通过UE报告和动态重新协调来增强预定义或随机的各种网络规划，以最小化小区间干扰。 从UE的角度来看，通过利用所通告的CB信息，UE可以学习用于波束感知扫描的服务小区和相邻小区CB模式。 光束感知扫描使得能够在UE处能够快速扫描相邻和目标小区的波束感知HO测量，这降低了HO等待时间并避免了不必要的HO。