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公开(公告)号：US20190081835A1
公开(公告)日：2019-03-14
申请号：US16129770
申请日：2018-09-12
Applicant: MediaTek Inc.
Inventor： Weidong Yang , Lung-Sheng Tsai , Bo-Si Chen
Abstract: Various solutions with respect to relative phase discontinuity (RPD) calibration in wireless communications are described. A user equipment (UE) receives a single trigger signal from a network node of a wireless network. The UE then transmits a plurality of reference signals in sequence to the network node responsive to receiving the single trigger signal. The network node can perform RPD calibration based on relative phase difference between adjacent reference signals in time domain of the plurality of reference signals received from the UE.
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公开(公告)号：US10104691B2
公开(公告)日：2018-10-16
申请号：US15098431
申请日：2016-04-14
Applicant: MEDIATEK INC.
Inventor： Chien-Chang Li , Pei-Kai Liao , Weidong Yang , Bo-Si Chen
Abstract: A method of determining and adapting a contention window size (CWS) based on channel loading for load-based equipment (LBE) listen before talk (LBT) channel access mechanism is proposed. The historic observations obtained from carrier sensing can reflect the state of channel loading, which is then used to adapt the maximal contention window size. A wireless device collects historical channel loading information including the number of idle slots and the number of busy slots. The wireless device uses the historical information to estimate the total number of active devices M in the wireless network and the channel-loading factor. The wireless device then computes the thresholds using the long-term value of M and then adapts the value of the CWS based on the channel-loading factor and the thresholds.
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公开(公告)号：US10045376B2
公开(公告)日：2018-08-07
申请号：US15433492
申请日：2017-02-15
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Bo-Si Chen , Chien-Chang Li , Yih-Shen Chen , Pavan Santhana Krishna Nuggehalli
IPC: G01R31/08 , H04L12/28 , H04L5/14 , H04J3/00 , H04W74/04 , H04W72/04 , H04W76/02 , H04W16/14 , H04W72/12 , H04W72/08 , H04W76/10
Abstract: A method of channel access procedure and QoS provisioning is proposed. When more than one user equipments (UEs) contend uplink transmission for a given time slot in an unlicensed band, uplink listen-before-talk (LBT) scheme should perform in a proper way to reflect service prioritization. The base station first determines the Channel Access Priority (CAP) for uplink LBT, and then signals such CAP to the UE via PDCCH. Upon receiving the CAP, the UE performs LBT procedure with corresponding CAP before uplink transmission. For example, the CAP can be determined based on QoS class identifier (QCI) of the radio bearer or based on the MAC layer logical channel prioritization (LCP).
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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：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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Patent Agency Ranking
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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37.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：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：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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