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：US20200153572A1

公开(公告)日：2020-05-14

申请号：US16683089

申请日：2019-11-13

Applicant: MEDIATEK INC.

Inventor： Lung-Sheng Tsai ,  Weidong Yang ,  Cheng-Rung Tsai ,  Jiann-Ching Guey ,  Chia-Hao Yu

IPC: H04L5/00 ,  H04L27/26 ,  H04W72/04

Abstract: In one novel aspect, configurations for PDCCH transmission and reception with multiple transmission points are provided. The UE configures a PDCCH associated with a CORSET comprising multiple CCEs, partitions the CORSET into multiple TCI-state sets, wherein each TCI state set includes multiple CCE groups associated with corresponding TCI-state, which corresponds to a source TRP, activates one TCI state set, and receives DCI via the PDCCH, wherein the PDCCH is transmitted from at least the first source TRP and the second source TRP, and wherein each source TRP transmits corresponding portion of DCI data mapping to the corresponding first and second CCE group. The CORSET is partitioned in FDM or TDM way. In another novel aspect, a first and a second PDCCH associated with a first and a second TRP are configured for repetition transmission. The second PDCCH configuration is dependent upon the first PDCCH configuration.

公开(公告)号：US20200053646A1

公开(公告)日：2020-02-13

申请号：US16537537

申请日：2019-08-10

Applicant: MediaTek Inc.

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

IPC: H04W52/02 ,  H04W24/08 ,  H04W72/14 ,  H04W8/00 ,  H04L5/00 ,  H04W74/08

Abstract: Various solutions for wake-up signal and preamble design for mobile communications are described. An apparatus, while in a first mode of operation, receives a wake-up signal (WUS) from a network. In response to receiving the WUS, the apparatus switches to a second mode of operation from the first mode of operation. The apparatus then detects a preamble in downlink (DL) transmissions from the network. In response to detecting the preamble, the apparatus monitors a physical downlink control channel (PDCCH) to check for an uplink (UL) transmission grant for the apparatus from the network.

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：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.