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    Transmission of UE-specific reference signal for wireless communication
    2.
    发明授权
    Transmission of UE-specific reference signal for wireless communication 失效
    用于无线通信的UE专用参考信号的传输

    公开(公告)号：US08576692B2

    公开(公告)日：2013-11-05

    申请号：US12878983

    申请日：2010-09-09

    申请人： Xiaoxia Zhang ,  Yongbin Wei ,  Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo

    发明人： Xiaoxia Zhang ,  Yongbin Wei ,  Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo

    IPC分类号： H04J11/00

    CPC分类号： H04L5/0051 ,  H04L5/0032 ,  H04L5/0037

    摘要： Techniques for transmitting UE-specific reference signals (UE-RSs) in a wireless network are described. In an aspect, a UE-RS may be transmitted in different manners depending on the number of layers used for data transmission. In one design, a cell may determine subcarriers for a UE-RS based on a frequency shift if data is transmitted on one layer and based on a predetermined set of subcarriers (with no frequency shift) if data is transmitted on multiple layers. In another aspect, a UE-RS may be transmitted on subcarriers determined based on a frequency shift for data transmission on multiple layers. In yet another aspect, a UE-RS may be transmitted from a plurality of cells to a UE for coordinated multi-point (CoMP). In yet another aspect, a UE-RS may be transmitted in a data section of a subframe including only the data section.

    摘要翻译： 描述了用于在无线网络中传送UE专用参考信号（UE-RS）的技术。 在一方面，可以根据用于数据传输的层数以不同的方式发送UE-RS。 在一种设计中，如果在多层上传输数据，则基于如果在一层上传送数据并且基于预定的一组子载波（无频移），则小区可以基于频移来确定UE-RS的子载波。 在另一方面，可以在基于用于多层数据传输的频移确定的子载波上发送UE-RS。 在另一方面，UE-RS可以从多个小区发送到用于协调多点（CoMP）的UE。 在另一方面，可以在仅包括数据部分的子帧的数据部分中发送UE-RS。

    TRANSMISSION OF UE-SPECIFIC REFERENCE SIGNAL FOR WIRELESS COMMUNICATION
    3.
    发明申请
    TRANSMISSION OF UE-SPECIFIC REFERENCE SIGNAL FOR WIRELESS COMMUNICATION 失效
    用于无线通信的UE特定参考信号的传输

    公开(公告)号：US20110216842A1

    公开(公告)日：2011-09-08

    申请号：US12878983

    申请日：2010-09-09

    申请人： Xiaoxia Zhang ,  Yongbin Wei ,  Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo

    发明人： Xiaoxia Zhang ,  Yongbin Wei ,  Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo

    IPC分类号： H04L27/28

    CPC分类号： H04L5/0051 ,  H04L5/0032 ,  H04L5/0037

    摘要： Techniques for transmitting UE-specific reference signals (UE-RSs) in a wireless network are described. In an aspect, a UE-RS may be transmitted in different manners depending on the number of layers used for data transmission. In one design, a cell may determine subcarriers for a UE-RS based on a frequency shift if data is transmitted on one layer and based on a predetermined set of subcarriers (with no frequency shift) if data is transmitted on multiple layers. In another aspect, a UE-RS may be transmitted on subcarriers determined based on a frequency shift for data transmission on multiple layers. In yet another aspect, a UE-RS may be transmitted from a plurality of cells to a UE for coordinated multi-point (CoMP). In yet another aspect, a UE-RS may be transmitted in a data section of a subframe including only the data section.

    摘要翻译： 描述了用于在无线网络中传送UE专用参考信号（UE-RS）的技术。 在一方面，可以根据用于数据传输的层数以不同的方式来发送UE-RS。 在一种设计中，如果在多层上传输数据，则基于如果在一层上传送数据并且基于预定的一组子载波（无频移），则小区可以基于频移来确定UE-RS的子载波。 在另一方面，可以在基于用于多层数据传输的频移确定的子载波上发送UE-RS。 在另一方面，UE-RS可以从多个小区发送到用于协调多点（CoMP）的UE。 在另一方面，可以在仅包括数据部分的子帧的数据部分中发送UE-RS。

    Precoding control channels in wireless networks
    6.
    发明授权
    Precoding control channels in wireless networks 有权
    无线网络中的预编码控制信道

    公开(公告)号：US08848603B2

    公开(公告)日：2014-09-30

    申请号：US12816708

    申请日：2010-06-16

    申请人： Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo ,  Xiaoxia Zhang ,  Kibeom Seong

    发明人： Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo ,  Xiaoxia Zhang ,  Kibeom Seong

    IPC分类号： H04J1/16 ,  H04L25/03 ,  H04L5/00

    CPC分类号： H04L25/03343 ,  H04B7/0413 ,  H04B7/0456 ,  H04L5/0048 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： Systems and methodologies are described that facilitate precoding signals transmitted over downlink control channels to provide transmit diversity. A dedicated reference signal (DRS) related to a wireless device can additionally be precoded such that the wireless device can determine a precoder or related parameters based at least in part on performing a channel estimate for the precoded DRS signal. The wireless device can utilize the determined precoder or related parameters to decode precoded signals received over downlink control channel resources. Additionally or alternatively, an access point can signal a sequence of precoders to the wireless device. The access point can cycle through the sequence of precoders to precode signals for transmission over downlink control channel resources, and the wireless device can decode the signals based at least in part on similarly cycling through the precoders for received signals.

    摘要翻译： 描述了促进预编码在下行链路控制信道上发送的信号以提供发射分集的系统和方法。 可以另外对与无线设备相关的专用参考信号（DRS）进行预编码，使得无线设备可以至少部分地基于对预编码的DRS信号执行信道估计来确定预编码器或相关参数。 无线设备可以利用所确定的预编码器或相关参数来解码通过下行链路控制信道资源接收的预编码信号。 附加地或替代地，接入点可以向无线设备发送一系列预编码器。 接入点可以循环通过预编码器序列来预编码信号以在下行链路控制信道资源上传输，并且无线设备可以至少部分地基于类似地循环通过用于接收信号的预编码器来对信号进行解码。

    INTERFERENCE MITIGATION BY PUNCTURING TRANSMISSION OF INTERFERING CELLS
    7.
    发明申请
    INTERFERENCE MITIGATION BY PUNCTURING TRANSMISSION OF INTERFERING CELLS 有权
    通过干扰细胞传播干扰减缓

    公开(公告)号：US20110190024A1

    公开(公告)日：2011-08-04

    申请号：US12853168

    申请日：2010-08-09

    申请人： Kibeom Seong ,  Tao Luo ,  Taesang Yoo ,  Xiaoxia Zhang ,  Dung Ngoc Doan

    发明人： Kibeom Seong ,  Tao Luo ,  Taesang Yoo ,  Xiaoxia Zhang ,  Dung Ngoc Doan

    IPC分类号： H04W52/04

    CPC分类号： H04W52/322 ,  H04L1/0045 ,  H04L1/0069 ,  H04L1/0072 ,  H04W52/244 ,  H04W72/082 ,  H04W84/045

    摘要： Systems and methodologies are described that facilitate controlling interference in a heterogeneous wireless communication environment. A Physical Broadcast Channel (PBCH) transmission from an interfering base station can be punctured based upon a puncturing pattern as a function of a cell identifier (ID) and a transmit time. Puncturing can be effectuated by applying power control. Thus, a punctured symbol or subframe can have a reduced transmit power or a transmit power set to zero. Further, the puncturing pattern can be defined on a subframe basis or on a symbol basis.

    摘要翻译： 描述了有助于控制异构无线通信环境中的干扰的系统和方法。 可以基于作为小区标识符（ID）和发送时间的函数的删截模式来对来自干扰基站的物理广播信道（PBCH）传输进行删截。 通过施加电源控制可以实现穿刺。 因此，打孔的符号或子帧可以具有降低的发射功率或设置为零的发射功率。 此外，可以基于子帧或基于符号来定义删截图案。

    PRECODING CONTROL CHANNELS IN WIRELESS NETWORKS
    8.
    发明申请
    PRECODING CONTROL CHANNELS IN WIRELESS NETWORKS 有权
    在无线网络中预测控制信道

    公开(公告)号：US20110141927A1

    公开(公告)日：2011-06-16

    申请号：US12816708

    申请日：2010-06-16

    申请人： Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo ,  Xiaoxia Zhang ,  Kibeom Seong

    发明人： Tao Luo ,  Dung Ngoc Doan ,  Taesang Yoo ,  Xiaoxia Zhang ,  Kibeom Seong

    IPC分类号： H04L12/26 ,  H04W4/00

    CPC分类号： H04L25/03343 ,  H04B7/0413 ,  H04B7/0456 ,  H04L5/0048 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： Systems and methodologies are described that facilitate precoding signals transmitted over downlink control channels to provide transmit diversity. A dedicated reference signal (DRS) related to a wireless device can additionally be precoded such that the wireless device can determine a precoder or related parameters based at least in part on performing a channel estimate for the precoded DRS signal. The wireless device can utilize the determined precoder or related parameters to decode precoded signals received over downlink control channel resources. Additionally or alternatively, an access point can signal a sequence of precoders to the wireless device. The access point can cycle through the sequence of precoders to precode signals for transmission over downlink control channel resources, and the wireless device can decode the signals based at least in part on similarly cycling through the precoders for received signals.

    摘要翻译： 描述了促进预编码在下行链路控制信道上发送的信号以提供发射分集的系统和方法。 可以另外对与无线设备相关的专用参考信号（DRS）进行预编码，使得无线设备可以至少部分地基于对预编码的DRS信号执行信道估计来确定预编码器或相关参数。 无线设备可以利用所确定的预编码器或相关参数来解码通过下行链路控制信道资源接收的预编码信号。 附加地或替代地，接入点可以向无线设备发送一系列预编码器。 接入点可以循环通过预编码器序列来预编码信号以在下行链路控制信道资源上传输，并且无线设备可以至少部分地基于类似地循环通过用于接收信号的预编码器来对信号进行解码。

    Per-cell timing and/or frequency acquisition and their use on channel estimation in wireless networks
    9.
    发明授权
    Per-cell timing and/or frequency acquisition and their use on channel estimation in wireless networks 有权

    公开(公告)号：US10111111B2

    公开(公告)日：2018-10-23

    申请号：US12949020

    申请日：2010-11-18

    申请人： Taesang Yoo ,  Tao Luo ,  Xiaoxia Zhang ,  Ke Liu

    发明人： Taesang Yoo ,  Tao Luo ,  Xiaoxia Zhang ,  Ke Liu

    IPC分类号： H04W24/00 ,  H04W56/00

    摘要： A method, an apparatus, and a computer program product for wireless communication are provided in which a system timing is estimated, derived from timing of one or more cells, a timing offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the timing offsets. In addition, a method, an apparatus, and a computer program product for wireless communication are provided in which a carrier frequency is estimated, derived from a frequency of one or more cells, a frequency offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the frequency offsets.

    Detecting and reporting physical-layer cell identifier collisions in wireless networks
    10.
    发明授权
    Detecting and reporting physical-layer cell identifier collisions in wireless networks 有权
    检测和报告无线网络中的物理层小区标识符冲突

    公开(公告)号：US09143955B2

    公开(公告)日：2015-09-22

    申请号：US13101877

    申请日：2011-05-05

    申请人： Xiaoxia Zhang ,  Ke Liu ,  Kapil Bhattad ,  Taesang Yoo ,  Tao Luo

    发明人： Xiaoxia Zhang ,  Ke Liu ,  Kapil Bhattad ,  Taesang Yoo ,  Tao Luo

    IPC分类号： H04W4/00 ,  H04W24/02 ,  H04W48/08 ,  H04W16/14

    CPC分类号： H04W24/02 ,  H04W16/14 ,  H04W48/08

    摘要： Physical-Layer Cell Identifier (PCID) collisions may occur in a wireless network when two neighboring evolved Node Bs (eNBs) having different Global Cell Identifiers (GCID) select identical PCIDs. Evolved Node Bs may uniquely identify themselves by transmitting on a broadcast channel, such as a Physical Broadcast Channel (PBCH), a pattern of bits corresponding to the eNB's GCID. Individual User Equipments (UEs) may recognize the PCID collision by decoding the PBCH payload to identify different GCID-modulated payloads from two eNBs involved in the PCID collision. Alternatively, UEs may detect PCID collisions in the wireless network by monitoring Primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSS) on the PBCH for identical signals separated by a relatively large time offset. After detecting a PCID collision, the UEs may attempt by best effort to report the PCID collision, may report to a fallback eNB, or the UEs may use special resources on an uplink channel.

    摘要翻译： 当具有不同的全局小区标识符（GCID）的两个相邻演进节点B（eNB）选择相同的PCID时，物理层小区标识符（PCID）冲突可能发生在无线网络中。 演进节点B可以通过在诸如物理广播信道（PBCH）的广播信道上发送与eNB的GCID相对应的比特模式来唯一地标识自身。 个体用户设备（UE）可以通过解码PBCH净荷来识别PCID冲突，从而识别来自涉及PCID冲突的两个eNB的不同GCID调制的有效载荷。 或者，UE可以通过监视PBCH上的主同步信号（PSS）和次同步信号（SSS）来检测无线网络中的PCID冲突，用相对较大的时间偏移分开的相同信号。 在检测到PCID冲突之后，UE可以尽最大努力报告PCID冲突，可以向后退eNB报告，或者UE可以在上行链路信道上使用特殊资源。