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    Low overhead PMI and CQI feedback and pairing schemes for MU-MIMO
    1.
    发明授权
    Low overhead PMI and CQI feedback and pairing schemes for MU-MIMO 失效
    用于MU-MIMO的低开销PMI和CQI反馈和配对方案

    公开(公告)号：US08644422B2

    公开(公告)日：2014-02-04

    申请号：US12705482

    申请日：2010-02-12

    申请人： Shiwei Gao ,  Hua Xu ,  Yongkang Jia ,  Amin Mobasher ,  Alireza Bayesteh ,  Zhijun Cai

    发明人： Shiwei Gao ,  Hua Xu ,  Yongkang Jia ,  Amin Mobasher ,  Alireza Bayesteh ,  Zhijun Cai

    IPC分类号： H03K9/00 ,  H04L27/06

    CPC分类号： H04L25/03343 ,  H04B7/0452 ,  H04B7/0465 ,  H04B7/0478 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/0641 ,  H04B7/0658 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/0031 ,  H04L2025/03426 ,  H04L2025/03605 ,  H04L2025/03808 ,  H04W24/00 ,  H04W72/00

    摘要： A method is provided for searching for a pairing PMI including estimating a MIMO wireless propagation channel from an access point transmitter to a receiver at a UE; quantizing the estimated channel with a codebook consisting of a plurality of codewords, the result being an actual SU-MIMO PMI currently applicable to the UE; estimating the channel quality corresponding to the actual SU-MIMO PMI, resulting in at least one CQI for the UE; constructing a plurality of subsets from a codebook of codewords, wherein each subset comprises potential MU-MIMO PMIs that represent channels that have reduced interference with a channel represented by one of the potential SU-MIMO PMIs; associating each potential SU-MIMO PMI with the subset that comprises the potential MU-MIMO PMIs that represent channels that have reduced interference with the channel represented by that potential SU-MIMO PMI; searching for an appropriate pairing PMI and the associated CQI for the UE.

    摘要翻译： 提供了一种用于搜索配对PMI的方法，包括：估计来自接入点发射机的MIMO无线传播信道到UE处的接收机; 使用由多个码字组成的码本量化估计信道，其结果是当前适用于UE的实际SU-MIMO PMI; 估计与实际SU-MIMO PMI相对应的信道质量，从而产生用于UE的至少一个CQI; 从代码字的码本构建多个子集，其中每个子集包括潜在的MU-MIMO PMI，其表示对由潜在的SU-MIMO PMI之一表示的信道具有减小的干扰的信道; 将每个潜在的SU-MIMO PMI与包含潜在的MU-MIMO PMI的子集相关联，所述潜在MU-MIMO PMI表示与由该潜在SU-MIMO PMI表示的信道具有减小的干扰的信道; 搜索用于UE的适当配对PMI和相关联的CQI。

    Method of Resource Allocation and Signaling for Aperiodic Channel Sounding
    2.
    发明申请
    Method of Resource Allocation and Signaling for Aperiodic Channel Sounding 审中-公开
    资源分配和非周期通道探测信号的方法

    公开(公告)号：US20130194908A1

    公开(公告)日：2013-08-01

    申请号：US13814848

    申请日：2010-08-13

    申请人： Shiwei Gao ,  Robert Mark Harrison ,  Zhijun Cai ,  Yongkang Jia ,  Hua Xu ,  Jack Anthony Smith ,  James Earl Womack

    发明人： Shiwei Gao ,  Robert Mark Harrison ,  Zhijun Cai ,  Yongkang Jia ,  Hua Xu ,  Jack Anthony Smith ,  James Earl Womack

    IPC分类号： H04W72/04

    CPC分类号： H04W72/0406 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0091

    摘要： A method for resource allocation. The method includes signaling a set of SRS subframes in which an SRS can be transmitted, wherein a UE not capable of aperiodic SRS transmission can be instructed to transmit periodic SRS in any of the SRS subframes. The method further includes signaling which of the SRS subframes are to be used for periodic SRS transmissions and which are to be used for aperiodic SRS transmissions, wherein a periodic SRS transmission is an SRS transmission that is transmitted by a UE in a first subframe, the first subframe being determined at least by the subframe in which the UE transmitted a previous SRS and an SRS periodicity, and wherein an aperiodic SRS transmission is an SRS transmission that is transmitted by a UE in a second subframe, the second subframe being determined at least by a transmission on a physical control channel to the UE.

    摘要翻译： 资源分配方法。 该方法包括发送一组可以发送SRS的SRS子帧的集合，其中可以指示不能进行非周期性SRS传输的UE能够在任何一个SRS子帧中发送周期性SRS。 该方法进一步包括：将SRS子帧中的哪一个用于周期性SRS传输，哪些用于非周期性SRS传输，其中周期性SRS传输是在第一子帧中由UE传输的SRS传输， 第一子帧至少由UE发送先前SRS的子帧和SRS周期确定，并且其中非周期性SRS传输是由UE在第二子帧中发送的SRS传输，第二子帧至少被确定 通过物理控制信道上的传输到UE。

    Downlink transmission in a multiple-user multiple-input multiple-output (“MU-MIMO”) wireless communication system
    3.
    发明授权
    Downlink transmission in a multiple-user multiple-input multiple-output (“MU-MIMO”) wireless communication system 有权
    多用户多输入多输出（MU-MIMO）无线通信系统中的下行链路传输

    公开(公告)号：US08406332B2

    公开(公告)日：2013-03-26

    申请号：US12689223

    申请日：2010-01-18

    申请人： Alireza Bayesteh ,  Amin Mobasher ,  Hua Xu ,  Yongkang Jia ,  Yi Yu ,  Jack Anthony Smith ,  Zhijun Sam Cai ,  Shiwei Gao

    发明人： Alireza Bayesteh ,  Amin Mobasher ,  Hua Xu ,  Yongkang Jia ,  Yi Yu ,  Jack Anthony Smith ,  Zhijun Sam Cai ,  Shiwei Gao

    IPC分类号： H04B7/02

    CPC分类号： H04B7/0632 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0639 ,  H04B7/0641

    摘要： Information transmission in a multiple-input multiple-output (“MIMO”) wireless communication system is provided. In one embodiment, a method for transmitting information in a MIMO wireless communication system, comprising updating channel quality information (“CQI”) values of a plurality of wireless devices, wherein updating said CQI values consider the effects of interference from transmissions to those wireless devices associated with a pre-assigned companion codeword set; pairing said plurality of wireless devices using at least said CQI values, a precoding matrix index (“PMI”) value and said pre-assigned companion codeword set, wherein said pre-assigned companion codeword set, pre-assigned companion codewords associated with said pre-assigned companion codeword set and said PMI value are updated for each of said plurality of wireless devices; precoding the information for each of said plurality of wireless devices using said PMI value; and transmitting said precoded information to each of said plurality of wireless devices.

    摘要翻译： 提供了一种多输入多输出（MIMO）无线通信系统中的信息传输。 在一个实施例中，一种用于在MIMO无线通信系统中发送信息的方法，包括更新多个无线设备的信道质量信息（CQI）值，其中更新所述CQI值考虑来自传输的干扰对那些与 预分配的伴随码字集合; 使用至少所述CQI值，预编码矩阵索引（PMI）值和所述预分配伴随码字集合来配对所述多个无线设备，其中所述预分配伴随码字集合，与所述预分配的相关联的预分配伴随码字 对于所述多个无线设备中的每一个更新伴随码字集合和所述PMI值; 使用所述PMI值对所述多个无线设备中的每一个预先编码信息; 以及将所述预编码信息发送到所述多个无线设备中的每一个。

    Transmit Downlink Control Information With Higher Order Modulation
    4.
    发明申请
    Transmit Downlink Control Information With Higher Order Modulation 失效
    使用高阶调制传输下行链路控制信息

    公开(公告)号：US20130003663A1

    公开(公告)日：2013-01-03

    申请号：US13174334

    申请日：2011-06-30

    申请人： Yufei Wu Blankenship ,  Michael Eoin Buckley ,  Zhijun Cai ,  Hua Xu ,  Sophie Vrzic ,  Shiwei Gao ,  Youn Hyoung Heo

    发明人： Yufei Wu Blankenship ,  Michael Eoin Buckley ,  Zhijun Cai ,  Hua Xu ,  Sophie Vrzic ,  Shiwei Gao ,  Youn Hyoung Heo

    IPC分类号： H04W74/04 ,  H04W72/04 ,  H04W92/00

    CPC分类号： H04L5/0053 ,  H04L1/0004

    摘要： A method is provided for applying HOM to a PDCCH to transmit control information from an access node to a UE. The method comprises: selecting a DCI format for a HOM PDCCH; determining a DCI block of the HOM PDCCH according to the selected DCI format; generating a sequence of coded bits to be transmitted from the DCI block; multiplexing the sequence of coded bits of the HOM PDCCH with coded bits of other PDCCHs to form a sequence of multiplexed bits; scrambling the sequence of multiplexed bits to form a sequence of scrambled bits; modulating the scrambled bits to form a sequence of modulation symbols; and transmitting the sequence of modulation symbols, where a PDCCH is transmitted on an aggregation of one or more CCEs.

    摘要翻译： 提供了一种用于将HOM应用于PDCCH以将控制信息从接入节点传送到UE的方法。 该方法包括：为HOM PDCCH选择DCI格式; 根据选择的DCI格式确定HOM PDCCH的DCI块; 产生要从DCI块发送的编码比特序列; 将HOM PDCCH的编码比特序列与其它PDCCH的编码比特进行多路复用，以形成多路复用比特序列; 对多路复用位序列进行加扰，形成加扰比特序列; 调制所述加扰比特以形成调制符号序列; 以及发送调制符号序列，其中在一个或多个CCE的聚合上发送PDCCH。

    Methods of PDCCH Capacity Enhancement in LTE Systems
    5.
    发明申请
    Methods of PDCCH Capacity Enhancement in LTE Systems 审中-公开
    LTE系统中PDCCH容量增强的方法

    公开(公告)号：US20120282936A1

    公开(公告)日：2012-11-08

    申请号：US13169856

    申请日：2011-06-27

    申请人： Shiwei Gao ,  Hua Xu ,  Dongsheng Yu ,  Shiguang Guo

    发明人： Shiwei Gao ,  Hua Xu ,  Dongsheng Yu ,  Shiguang Guo

    IPC分类号： H04W72/12

    CPC分类号： H04L5/0053 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/03866 ,  H04L25/03891

    摘要： A method is provided for transmitting data scheduling information from at least one transmission point in a cell in a wireless telecommunication system. The method comprises, in a procedure for generating a PDCCH, the at least one transmission point inserting a DMRS into at least one resource element in at least one REG in at least one CCE that contains the PDCCH, wherein the PDCCH is intended only for at least one specific UE.

    摘要翻译： 提供一种用于从无线电信系统中的小区中的至少一个传输点发送数据调度信息的方法。 该方法包括在用于生成PDCCH的过程中至少一个传输点将DMRS插入到至少一个包含PDCCH的CCE中的至少一个REG中的至少一个资源元素中，其中，PDCCH仅用于 至少一个特定的UE。

    Frequency-Hopping Method for LTE Aperiodic Sounding Reference Signals
    7.
    发明申请
    Frequency-Hopping Method for LTE Aperiodic Sounding Reference Signals 审中-公开
    LTE非周期性探测参考信号的跳频方法

    公开(公告)号：US20120113967A1

    公开(公告)日：2012-05-10

    申请号：US13248149

    申请日：2011-09-29

    申请人： Jack Anthony Smith ,  Zhijun Cai ,  Shiwei Gao

    发明人： Jack Anthony Smith ,  Zhijun Cai ,  Shiwei Gao

    IPC分类号： H04B1/713 ,  H04W92/00

    CPC分类号： H04B1/7143 ,  H04L5/0062 ,  H04L27/2613 ,  H04L27/2636

    摘要： Methods and apparatus are provided to enable aperiodic sounding reference signaling including frequency hopping through the use of additional RRC configuration. The methods can require little or no additional L1 overhead to support narrowband frequency hopping for aperiodic sounding transmissions. In some embodiments, an approach is provided for extending an LTE periodic sounding reference signal methodology to include aperiodic sounding. One benefit of the proposed technique is that it enables each UE to perform aperiodic channel sounding in sounding subframes, using a frequency-hopping pattern, in which the sounding bandwidth of the UE can be narrowed appropriately to match its link capability. Additional benefits of the new approach include better resource utilization, lower signaling overhead, faster channel information update rates, and lower blocking probabilities.

    摘要翻译： 提供了方法和装置，以使得能够通过使用附加的RRC配置来进行非周期性的探测参考信号，包括跳频。 这些方法可能需要很少的或没有额外的L1开销来支持非周期性发声传输的窄带跳频。 在一些实施例中，提供了一种用于将LTE周期性探测参考信号方法扩展以包括非周期性探测的方法。 所提出的技术的一个好处在于，它使得每个UE能够使用跳频模式来执行在探测子帧中的非周期信道探测，其中可以适当地缩小UE的探测带宽以匹配其链路能力。 新方法的另外的好处包括更好的资源利用率，较低的信令开销，更快的信道信息更新速率和更低的阻塞概率。

    Method and system for random access interference mitigation in heterogeneous cellular networks
    10.
    发明授权
    Method and system for random access interference mitigation in heterogeneous cellular networks 有权
    异构蜂窝网络中随机接入干扰减轻的方法和系统

    公开(公告)号：US09025476B2

    公开(公告)日：2015-05-05

    申请号：US13458591

    申请日：2012-04-27

    申请人： Jianfeng Weng ,  Shiguang Guo ,  Shiwei Gao ,  Mo-Han Fong ,  Youn Hyoung Heo ,  Andrew Mark Earnshaw

    发明人： Jianfeng Weng ,  Shiguang Guo ,  Shiwei Gao ,  Mo-Han Fong ,  Youn Hyoung Heo ,  Andrew Mark Earnshaw

    IPC分类号： H04L12/26 ,  H04W48/20 ,  H04W74/08 ,  H04W84/04

    CPC分类号： H04W48/20 ,  H04W74/08 ,  H04W84/045 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146

    摘要： Methods and systems at a user equipment, low power access node and first access node operating in a wireless network having a plurality of access nodes comprising a first access node and at least one low power access node having lower transmit power than the first access node, wherein the user equipment receives stronger downlink signals from the first access node than from the at least one low power access node, the method at the user equipment determining, by the user equipment, whether a low power access node is better for uplink data transmission than the first access node; and if the low power access node is better for uplink data transmission, sending from the user equipment to the low power access node, a random access preamble directed to the first access node.

    摘要翻译： 在具有多个接入节点的无线网络中操作的用户设备，低功率接入节点和第一接入节点的方法和系统包括第一接入节点和具有比第一接入节点更低的发射功率的至少一个低功率接入节点， 其中所述用户设备从所述第一接入节点接收比来自所述至少一个低功率接入节点的更强的下行链路信号，所述用户设备的方法由用户设备确定低功率接入节点对于上行链路数据传输是否更好， 第一接入节点; 并且如果低功率接入节点对于上行链路数据传输更好，则从用户设备向低功率接入节点发送指向第一接入节点的随机接入前导码。