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公开(公告)号：US11121803B2
公开(公告)日：2021-09-14
申请号：US16407407
申请日：2019-05-09
Applicant: Mediatek Inc.
Inventor： Teemu Tapio Virtanen , Weidong Yang , Karl Marko Juhani Lampinen , Lung-Sheng Tsai
Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE determines a first uplink slot on an uplink carrier for reporting channel state information. The UE determines, on a downlink carrier, a first downlink slot that is an earliest downlink slot overlaps with the first uplink slot. The UE determines a number M based on a numerology of the downlink carrier, M being an integer greater than or equal to 0. The UE measures a reference signal, received no later than a second downlink slot that is a latest valid downlink slot no later than M downlink slots prior to the first downlink slot, to generate the channel state information.
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公开(公告)号：US10757581B2
公开(公告)日：2020-08-25
申请号：US15927226
申请日：2018-03-21
Applicant: MEDIATEK INC.
Inventor： Chien-Hwa Hwang , Chien-Chang Li , Yi-Ju Liao , Pei-Kai Liao , Weidong Yang
Abstract: A new design for physical downlink control channel (PDCCH) is proposed for the next generation 5G new radio systems. A UE receives the configuration of a default control resource set (CORESET) in MIB/SIB from its serving base station. The default CORESET contains both common search space and UE-specific search space for candidate PDCCH transmission. A PDCCH in a default CORESET is mapped to physical resource in a distributed or localized manner. Specifically, various REG-to-CCE mapping rules are proposed to improve frequency diversity gain, or frequency selectivity gain, or to reduce latency of PDCCH processing. Further, to facilitate analog beamforming in mmWave systems, the default CORESET is transmitted in a synchronization signal (SS) block associated with a corresponding analog beam direction.
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公开(公告)号：US10440703B2
公开(公告)日：2019-10-08
申请号：US15865229
申请日：2018-01-08
Applicant: MEDIATEK INC.
Inventor： Chien-Hwa Hwang , Weidong Yang , Pei-Kai Liao , Wei-De Wu
Abstract: A method to improve the design of new radio physical downlink control channel (NR-PDCCH) transmission and to reduce the false alarm rate of NR-PDCCH blind decoding is proposed. The downlink control information (DCI) bits are carried by NR-PDCCH to be transmitted to UEs after CRC attachment, channel encoding, interleaving, and modulation. The proposed NR-PDCCH design is separated into two parts. In a first part, a UE-ID or RNTI is used to derive a CRC mask or a scrambling sequence for CRC attachment of the DCI bits. In a second part, a UE-specific ID is used to derive an interleaver before or after channel encoding of the DCI bits. If the interleaver is placed before channel encoding, it takes the form of a bit interleaver. If the interleaver is placed after channel encoding, it takes the form of a bit interleaver or a channel interleaver.
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公开(公告)号：US10420079B2
公开(公告)日：2019-09-17
申请号：US15473622
申请日：2017-03-30
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Yih-Shen Chen , Chien-Chang Li , Bo-Si Chen
Abstract: Methods and apparatus are provided for control overhead reduction. The UE configures one or more short transmission time interval regions over a normal TTI region shared by the UE and one or more other, each UE includes a self-contained control information sPDCCH occupying a control information region. The UE detects a cover signal, which indicates one or more resource elements in the sPDCCH control-information region that can be used for data transmission. The UE obtains data transmission from the REs in the SPDCCH control information region based on the detected cover signal. In one embodiment, the cover signal is a dedicated signal. In another embodiment, the cover signal is a common signal. In yet another embodiment, the cover signal is encoded in a downlink control information (DCI) intended for the UE. In one embodiment, the cover signal indicates one or more CCE REs to be excluded for data transmission.
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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
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.
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Patent Agency Ranking
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
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.
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公开(公告)号：US10397795B2
公开(公告)日：2019-08-27
申请号：US15010000
申请日：2016-01-29
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Pei-Kai Liao , Chien-Chang Li , Bo-Si Chen
Abstract: Methods and apparatus are provided for improved Licensed Assisted Access (LAA) networks. A LAA subframe is received via an unlicensed frequency band. Control information is communicated via predetermined symbol locations within the LAA subframe. An indication of a first and a second symbol locations is received. A LAA subframe is then received. It is determined if control information is present at the first or second symbol locations within the received LAA subframe. Demodulation parameters based on the control information are determined. The LAA subframe is demodulated using the demodulation parameters. An indication of a transmission duration is communicated to a UE. The transmission duration is determined based on the LAA subframe. A type of subframe is determined based on transmission duration. Automatic Gain Control (AGC) protection is provided in a LAA subframe. The AGC protection LLA subframe does not communicate control information in a symbol adjacent to a reservation signal.
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公开(公告)号：US20190082330A1
公开(公告)日：2019-03-14
申请号：US16127595
申请日：2018-09-11
Applicant: MEDIATEK INC.
Inventor： Jiann-Ching Guey , Chia-Hao Yu , Weidong Yang
Abstract: Apparatus and methods are provided using interleaved frequency division multiple access (IFDMA)-based beam management reference signal for TX and RX beam sweeping. In one novel aspect, a set of IFDMA-based BM RS for TX and RX beam sweeping is configured by decomposing a defined reference numerology into N equal-length sub-time units such that the TX and RX beams can switch across sub-time unit boundary. In another novel aspect, a set of IFDMA-based beam management RS for TX and RX beams are configured by concatenating a plurality of IFDMA signals each defined over a corresponding numerology, wherein at least two IFDMA signals have different numerologies. TX and RX beam sweeping are performed based on corresponding TX and RX beam switching points. In another embodiment, the RS is a channel state information RS for a downlink measurement and a sounding reference signal for an uplink measurement.
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59.发明申请公开(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
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).
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60.发明申请公开(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.
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