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公开(公告)号：US10292182B2
公开(公告)日：2019-05-14
申请号：US15432022
申请日：2017-02-14
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Bo-Si Chen , Chien-Chang Li , Yih-Shen Chen , Pavan Santhana Krishna Nuggehalli
Abstract: A method of dynamic spectrum sharing mechanism called listen-before-talk (LBT) is proposed for uplink transmission in Licensed Assisted Access (LAA). A maximum channel occupancy time (MCOT) including downlink (DL) transmission from one eNB and uplink (UL) transmission to the same eNB is introduced. A transmission sequence is defined as a number of subframes including possible partial subframes for DL and/or UL within a MCOT. The transmission in the first subframe among the transmission sequence is conducted after a Category 4 LBT. The transmission sequence within the MCOT can be initiated by either a DL transmission or an UL transmission. After the first subframe in a transmission sequence, LBT for another transmission is a fast DL LBT and/or fast UL LBT. Further, a Category 4 LBT can be converted to a short LBT (e.g., one shot CCA) for more efficient channel access.
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公开(公告)号：US20190103907A1
公开(公告)日：2019-04-04
申请号：US16149339
申请日：2018-10-02
Applicant: MediaTek Inc.
Inventor： Weidong Yang , Tzu-Han Chou , Chao-Cheng Su , Lung-Sheng Tsai , Bo-Si Chen
Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) stores information with respect to a plurality of permutations with respect to a mapping between a plurality of sounding reference signal (SRS) resources and a plurality of antenna ports at the UE. The UE receives signaling from a network node of a wireless network. The signaling contains an index identifying a permutation among the plurality of permutations. The UE performs an uplink transmission of data to the network node using one or more SRS resources of the plurality of SRS resources and one or more antenna ports of the plurality of antenna ports according to the identified permutation.
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公开(公告)号：US10251067B2
公开(公告)日：2019-04-02
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
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.
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公开(公告)号：US20180367346A1
公开(公告)日：2018-12-20
申请号：US16010363
申请日：2018-06-15
Applicant: MediaTek Inc.
Inventor： Bo-Si Chen , Weidong Yang
IPC: H04L25/02 , H04L5/00 , H04L1/00 , H04B17/345
Abstract: Various solutions for cross-link interference (CLI) measurement with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a configuration indicating a zero power (ZP) sounding reference signal (SRS) from a transmit/receive point (TRP). The apparatus may receive an SRS from a user equipment (UE). The apparatus may perform CLI measurement according to the SRS from the UE with the ZP SRS from the TRP.
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15.发明申请公开(公告)号：US20180367244A1
公开(公告)日：2018-12-20
申请号：US16009504
申请日：2018-06-15
Applicant: MediaTek Inc.
Inventor： Weidong Yang , Bo-Si Chen
Abstract: Various solutions for uplink partial sub-frame transmission with respect to user equipment and network apparatus in mobile communications are described. An apparatus may map a plurality of code blocks to radio resources by a frequency-first manner. The apparatus may determine an uplink transmission starting point. The apparatus may puncture the code blocks before the uplink transmission starting point. The apparatus may transmit at least one complete code block after the uplink transmission starting point.
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Patent Agency Ranking
公开(公告)号：US09979522B2
公开(公告)日：2018-05-22
申请号：US15281030
申请日：2016-09-29
Applicant: MEDIATEK INC.
Inventor： Chien-Chang Li , Weidong Yang , Pei-Kai Liao , Bo-Si Chen
CPC classification number: H04L5/0048 , H04W48/16 , H04W72/042 , H04W72/0446 , H04W88/02
Abstract: Methods and apparatus are provided for multiplexing DRS within a transmission burst for opportunistic spectrum access. In one novel aspect, DRS is not transmitted in a fractional subframe within a TXOP. In one embodiment, if the starting fractional subframe, which contains initial signal, occurs in a configured DMTC, DRS is transmitted in the first subframe next to the starting fractional subframe. In another embodiment, if DMTC starts from a complete subframe within a TXOP, DRS is transmitted in the first candidate position within a DMTC. In another novel aspect, in the DRS subframe, PDSCH is allocated in the PRBs outside the central PRBs (six or twenty-five PRBs). In one embodiment, the reservation signal can be used to satisfy the requirement of occupied bandwidth and continuity transmission. In another embodiment, the free REs in central PRBs carry the system information when required on the unlicensed band.
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公开(公告)号：US20170238334A1
公开(公告)日：2017-08-17
申请号：US15432022
申请日：2017-02-14
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Bo-Si Chen , Chien-Chang Li , Yih-Shen Chen , Pavan Santhana Krishna Nuggehalli
CPC classification number: H04W74/0816 , H04W74/006 , H04W74/0808
Abstract: A method of dynamic spectrum sharing mechanism called listen-before-talk (LBT) is proposed for uplink transmission in Licensed Assisted Access (LAA). A maximum channel occupancy time (MCOT) including downlink (DL) transmission from one eNB and uplink (UL) transmission to the same eNB is introduced. A transmission sequence is defined as a number of subframes including possible partial subframes for DL and/or UL within a MCOT. The transmission in the first subframe among the transmission sequence is conducted after a Category 4 LBT. The transmission sequence within the MCOT can be initiated by either a DL transmission or an UL transmission. After the first subframe in a transmission sequence, LBT for another transmission is a fast DL LBT and/or fast UL LBT. Further, a Category 4 LBT can be converted to a short LBT (e.g., one shot CCA) for more efficient channel access.
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18.发明申请公开(公告)号：US20170055293A1
公开(公告)日：2017-02-23
申请号：US15238610
申请日：2016-08-16
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Chien-Chang Li , Pei-Kai Liao , Bo-Si Chen
IPC: H04W74/08 , H04L12/851
CPC classification number: H04L47/24 , H04L5/0035 , H04W74/002
Abstract: A method of distributed control achieving fair radio resource access is proposed. The parameters used in a listen-before-talk (LBT) channel access procedure that are used to control how aggressively a node contends for channel access can be called as “Channel Access Transmission Parameters” or CAT parameters. The proposed method uses randomized CAT parameters for each traffic type, and then obtains prioritized access for some nodes at any given time and fair access averaged over a period of time. More specifically, a transmitting node can use more than one set of CAT parameters even for the same traffic type instead of conventional only use one set of CAT parameters for one traffic type. The transmitting node can use a set of CAT parameters according to a fixed schedule, a random rule, or a pseudo-random rule.
Abstract translation: 提出了一种实现公平无线电资源访问的分布式控制方法。 在用于控制节点竞争通道接入的积极性的用于听即演（LBT）通道访问过程中使用的参数可被称为“通道访问传输参数”或CAT参数。 所提出的方法针对每个流量类型使用随机CAT参数，然后在任何给定时间获得一些节点的优先级访问，并在一段时间内平均访问。 更具体地，即使对于相同的业务类型，发送节点也可以使用多于一组的CAT参数集，而不是传统的仅为一种业务类型使用一组CAT参数。 发送节点可以根据固定的时间表，随机规则或伪随机规则使用一组CAT参数。
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公开(公告)号：US10742360B2
公开(公告)日：2020-08-11
申请号：US15952661
申请日：2018-04-13
Applicant: MediaTek Inc.
Inventor： Weidong Yang , Lung-Sheng Tsai , Tzu-Han Chou , Yu-Chuan Lin , Bo-Si Chen
Abstract: Techniques and examples of layer mapping, channel state information (CSI) feedback and hybrid automatic repeat request (HARQ) feedback in mobile communications are described. A user equipment (UE) receives from a base station one or more reference signals, which may be non-zero power (NZP) or zero power (ZP), on one or more time-frequency resources indicated by a network via a communication link between the UE and the base station. The UE estimates, based on the receiving, a subspace spanned by a channel response of an interfering signal. The UE determines a precoding matrix indicator (PMI) based on the estimated subspace. The UE transmits to the base station a channel state information (CSI) feedback comprising at least the PMI. The PMI may include at least a first precoder and a second precoder.
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公开(公告)号：US10420080B2
公开(公告)日：2019-09-17
申请号：US15473628
申请日：2017-03-30
Applicant: MEDIATEK INC.
Inventor： Weidong Yang , Yih-Shen Chen , Chien-Chang Li , Bo-Si Chen
IPC: H04J3/00 , H04W72/04 , H04W52/14 , H04W72/10 , H04W72/08 , H04L5/00 , H04W84/04 , H04W52/16 , H04W52/28
Abstract: Methods and apparatus are provided for transmission preemption and its indication. In one novel aspect, the UE receives a downlink resource assignment and determines whether an ultra-low latency (ULL) alert signal exists, wherein the ULL alert signal indicates a set of soft bits are overridden. The UE discards the set of soft bits from the overridden resources upon determining the ULL alert signal exists. In one embodiment, the ULL alert signal resides in the assignment subframe, and the overridden soft bits are in the assignment subframe. The alert timing for the ULL alert signal is preconfigured. In another embodiment, the ULL alert signal resides in a subframe that is right after the assignment subframe. The alert signal is enabled through an enabling of an enhanced mobile broadband and ULL service. The alter signal indicates a superset of the overridden soft bits or part of the overridden soft bits.
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