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公开(公告)号：US20180199373A1
公开(公告)日：2018-07-12
申请号：US15862873
申请日：2018-01-05
Applicant: MediaTek Inc.
Inventor： Weidong Yang , Bo-Si Chen , Chien-Chang Li
CPC classification number: H04W74/0808 , H04W24/08 , H04W52/243 , H04W52/50
Abstract: Various solutions for interference management with respect to user equipment and network apparatus in mobile communications are described. A first node of a first link in a wireless network may sense transmission from at least one of a third node and a fourth node of a second link in the wireless network. The first node may further determine whether to transmit signals to a second node of the first link according to a sensing result. The first link may be established between the first node and the second node. The second link may be established between the third node and the fourth node.
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公开(公告)号：US20180199344A1
公开(公告)日：2018-07-12
申请号：US15868015
申请日：2018-01-11
Applicant: MEDIATEK INC.
Inventor： Pei-Kai Liao , Tao Chen , Chien-Chang Li
Abstract: In one novel aspect, a plurality of synchronization signal (SS) anchors within a block of a contiguous spectrum is configured in a wireless network, wherein each SS anchor is a primary SS anchor or a secondary SS anchor. The UE performs an initial access by detecting a first primary SS anchor and receives one or more virtual carrier configurations with corresponding SS anchors within the block of the contiguous spectrum. In another novel aspect, The UE performs an initial access through a first RF band with a first bandwidth and a first center frequency, receives a switching signal to switch from the first RF band to a second RF band with a second bandwidth and a second center frequency, wherein the second bandwidth is different from the first bandwidth, and performs a RF bandwidth adaptation from the first RF band to the second RF band based on the adaptation signal.
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公开(公告)号：US09979581B2
公开(公告)日：2018-05-22
申请号：US15474125
申请日：2017-03-30
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Chien-Chang Li , Bo-Si Chen , Yih-Shen Chen
CPC classification number: H04L27/2666 , H04L1/0029 , H04L1/0031 , H04L1/0038 , H04L1/1819 , H04L1/1822 , H04L1/1896 , H04L5/0007 , H04W48/16 , H04W72/0413 , H04W72/0473
Abstract: A flexible and efficient physical downlink control channel (PDCCH) signaling scheme that schedules physical uplink shared channel (PUSCH) transmission over multiple subframes with Hybrid Automatic Retransmission (HARQ) support is proposed. The PDCCH has a downlink control information (DCI) format that schedules PUSCH transmission over multiple subframes. The PUSCH transmission is associated with multiple HARQ processes with non-consecutive HARQ process IDs. Furthermore, the DCI format uses joint signaling to combine HARQ process indexes, new data indication (NDI), and redundancy version (RV) to reduce signaling overhead.
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公开(公告)号：US20170324499A1
公开(公告)日：2017-11-09
申请号：US15657430
申请日：2017-07-24
Applicant: MEDIATEK INC.
Inventor： Pei-Kai Liao , Hsiao-Lan Chiang , Chien-Chang Li , Xiangyang Zhuang
CPC classification number: H04J11/005 , H04J11/0079 , H04J2011/0096 , H04L5/0007 , H04L5/005 , H04L5/0073 , H04L27/2613 , H04W24/08 , H04W48/10 , H04W48/16 , H04W88/02
Abstract: A method of small cell discovery and RSRP/RSRQ measurements in OFDM/OFDMA systems is proposed. A discovery reference signal (DRS) with low transmission frequency is introduced to support small cell detection within a short time, multiple small cell discovery, and accurate measurement of multiple small cells. The DRS consists of one or multiple reference signal types with the functionalities including timing and frequency synchronization, cell detection, RSRP/RSSI/RSRQ measurements, and interference mitigation. RE muting is configured for the DRS to reduce interference level from data to DRS for discovery and RSRP/RSRQ measurements for small cells.
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公开(公告)号：US20170303303A1
公开(公告)日：2017-10-19
申请号：US15474094
申请日：2017-03-30
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Chien-Chang Li , Bo-Si Chen , Yih-Shen Chen
Abstract: A physical random access channel (PRACH) waveform design to satisfy the requirements on the occupied channel bandwidth in eLAA wireless communications network is provided. In one alternative, PRACH comprises multiple segments in the time/frequency domain in one subframe. In another alternative, PRACH comprises multiple segments in the time/frequency domain across two or more subframes by using inter-subframe hopping. In one advantageous aspect, PDCCH triggers the dynamic allocation of the PRACH resource to facilitate the listen-before-talk (LBT) channel access procedure in unlicensed carriers. The aperiodic and dynamic allocation of PRACH resource improves efficiency and PRACH success rate.
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Patent Agency Ranking
46.发明申请Methods of Beacon Transmission for Measurements in Opportunistic Spectrum Access 审中-公开信标传输方法在机会频谱接入中的测量公开(公告)号：US20160278125A1
公开(公告)日：2016-09-22
申请号：US15070191
申请日：2016-03-15
Applicant: MEDIATEK INC.
Inventor： Pei-Kai Liao , Weidong Yang , Chien-Chang Li , Bo-Si Chen
CPC classification number: H04W16/14 , H04W24/00 , H04W24/10 , H04W48/00 , H04W72/02 , H04W72/04 , H04W74/0808
Abstract: Periodic Radio Resource Management (RRM) reporting from user equipments (UEs) is beneficial for a network to efficiently select a carrier with a cleaner channel to serve the UEs. To enable periodic RRM reporting from UEs, periodic beacon signal transmission for UE measurements is necessary. However, in a shared spectrum, precise periodic transmission cannot be guaranteed due to channel contention. A method of transmission with periodic time windows for beacon signal transmission is proposed to resolve potential issues. Under the proposed solution, beacon signal can be transmitted in a certain periodic fashion without frequent physical layer signaling. Furthermore, periodic beacon signal transmission for measurements can be kept with low transmission failure rate due to channel contention.
Abstract translation: 来自用户设备（UE）的定期无线电资源管理（RRM）报告有利于网络有效地选择具有更干净信道的载波来服务于UE。 为了实现来自UE的周期性RRM报告，需要用于UE测量的周期性信标信号传输。 然而，在共享频谱中，由于信道争用，无法保证精确的周期性传输。 提出了一种用于信标信号传输的具有周期性时间窗的传输方法来解决潜在的问题。 在提出的解决方案下，信标信号可以以一定的周期性方式发送，而不需要频繁的物理层信令。 此外，由于信道争用，用于测量的周期性信标信号传输可以保持低传输故障率。
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公开(公告)号：US20160227545A1
公开(公告)日：2016-08-04
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
CPC classification number: H04W16/14 , H04L5/0007 , H04L5/0048 , H04L5/0092 , H04L5/14 , H04W72/0406
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.
Abstract translation: 提供了用于改进的许可辅助接入（LAA）网络的方法和装置。 经由非许可频带接收LAA子帧。 通过LAA子帧内的预定符号位置传送控制信息。 接收到第一和第二符号位置的指示。 然后接收LAA子帧。 确定控制信息是否存在于接收的LAA子帧内的第一或第二符号位置处。 确定基于控制信息的解调参数。 LAA子帧使用解调参数进行解调。 向UE发送传输持续时间的指示。 基于LAA子帧确定传输持续时间。 基于传输持续时间来确定一种类型的子帧。 LAA子帧中提供自动增益控制（AGC）保护。 AGC保护LLA子帧不在与预留信号相邻的符号中传送控制信息。
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公开(公告)号：US11018910B2
公开(公告)日：2021-05-25
申请号：US16191640
申请日：2018-11-15
Applicant: Mediatek Inc.
Inventor： Yiju Liao , Chien Hwa Hwang , Chien-Chang Li
Abstract: A UE determines a first DCCH resource candidate in a first CORESET on a carrier, the first DCCH resource candidate including a first set of RBs. The UE also determines a first sequence of DMRSs that are mapped, starting at a reference point, to RBs in a predetermined range within the carrier in a frequency domain, the predetermined range containing the first DCCH resource candidate in the frequency domain. The UE further determines a first reference location of the first set of RBs. The UE determines, based on the first reference location, a first set of DMRSs from the first sequence of DMRSs, the first set of DMRSs being mapped to the first set of RBs. The UE obtains a channel estimation based on the first set of DMRSs; and The UE performs blind decoding of the first DCCH resource candidate based on the channel estimation.
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公开(公告)号：US20200351881A1
公开(公告)日：2020-11-05
申请号：US16932952
申请日：2020-07-20
Applicant: MEDIATEK INC.
Inventor： Pei-Kai Liao , Tao Chen , Chien-Chang Li
Abstract: In one novel aspect, a plurality of synchronization signal (SS) anchors within a block of a contiguous spectrum is configured in a wireless network. Each SS anchor is a primary SS anchor or a secondary SS anchor. The UE performs an initial access by detecting a first primary SS anchor and receives one or more virtual carrier configurations with corresponding SS anchors within the block of the contiguous spectrum. In another novel aspect, the UE performs an initial access through a first RF band with a first bandwidth and a first center frequency, receives a switching signal to switch from the first RF band to a second RF band with a second bandwidth and a second center frequency, the second bandwidth is different from the first bandwidth, and performs a RF bandwidth adaptation from the first RF band to the second RF band based on the adaptation signal.
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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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