公开(公告)号：US20080268834A1

公开(公告)日：2008-10-30

申请号：US11796328

申请日：2007-04-27

申请人： Gerard J. Foschini ,  Taesang Yoo

发明人： Gerard J. Foschini ,  Taesang Yoo

IPC分类号： H04Q7/20

CPC分类号： H04B7/043 ,  H04B7/0452 ,  H04B7/0465 ,  H04W52/346 ,  H04W72/082

摘要： In a system of MIMO communications in a wireless network, a number of wireless units are logically divided into a plurality of user groups, through operation of a semi-orthogonal user selection sub-system. For example, the user selection sub-system may implement a heuristic user selection algorithm based on near-orthogonality. Each user group is assigned a discrete transmission channel, which may be orthogonally defined in terms of frequency, time, or code. Data is transmitted over the channels (e.g., from network base stations) in a coherently coordinated manner, according to a zero-forcing beamforming operation. The system may be configured for operation in a time/frequency selective manner, e.g., over time/frequency selective fading channels. The wireless units may be allocated to the time/frequency slots based on prioritization of channel strength and considerations of fairness, in conjunction with the application of a semi-orthogonal user selection algorithm.

摘要翻译： 在无线网络中的MIMO通信系统中，通过半正交用户选择子系统的操作，将多个无线单元在逻辑上划分成多个用户组。 例如，用户选择子系统可以实现基于近正交性的启发式用户选择算法。 每个用户组被分配离散的传输信道，其可以根据频率，时间或代码来正交地定义。 根据迫零波束成形操作，以相干协调的方式通过信道（例如，来自网络基站）发送数据。 该系统可以被配置为以时间/频率选择性方式操作，例如，随着时间/频率选择性衰落信道。 结合半正交用户选择算法的应用，无线单元可以基于信道强度的优先级和公平性的考虑来分配给时间/频率时隙。

公开(公告)号：US08849353B2

公开(公告)日：2014-09-30

申请号：US11796328

申请日：2007-04-27

申请人： Gerard J. Foschini ,  Taesang Yoo

发明人： Gerard J. Foschini ,  Taesang Yoo

IPC分类号： H04M1/00 ,  H04B7/04

CPC分类号： H04B7/043 ,  H04B7/0452 ,  H04B7/0465 ,  H04W52/346 ,  H04W72/082

摘要： In a system of MIMO communications in a wireless network, a number of wireless units are logically divided into a plurality of user groups, through operation of a semi-orthogonal user selection sub-system. For example, the user selection sub-system may implement a heuristic user selection algorithm based on near-orthogonality. Each user group is assigned a discrete transmission channel, which may be orthogonally defined in terms of frequency, time, or code. Data is transmitted over the channels (e.g., from network base stations) in a coherently coordinated manner, according to a zero-forcing beamforming operation. The system may be configured for operation in a time/frequency selective manner, e.g., over time/frequency selective fading channels. The wireless units may be allocated to the time/frequency slots based on prioritization of channel strength and considerations of fairness, in conjunction with the application of a semi-orthogonal user selection algorithm.

摘要翻译： 在无线网络中的MIMO通信系统中，通过半正交用户选择子系统的操作，将多个无线单元在逻辑上划分成多个用户组。 例如，用户选择子系统可以实现基于近正交性的启发式用户选择算法。 每个用户组被分配离散的传输信道，其可以根据频率，时间或代码来正交地定义。 根据迫零波束成形操作，以相干协调的方式通过信道（例如，来自网络基站）发送数据。 该系统可以被配置为以时间/频率选择性方式操作，例如，随着时间/频率选择性衰落信道。 结合半正交用户选择算法的应用，无线单元可以基于信道强度的优先级和公平性的考虑来分配给时间/频率时隙。

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.

公开(公告)号：US09497765B2

公开(公告)日：2016-11-15

申请号：US13364891

申请日：2012-02-02

申请人： Taesang Yoo ,  Hendrik Schoeneich ,  Myriam Rajih ,  Tao Luo ,  Siddhartha Mallik

发明人： Taesang Yoo ,  Hendrik Schoeneich ,  Myriam Rajih ,  Tao Luo ,  Siddhartha Mallik

IPC分类号： H04W4/00 ,  H04W72/08 ,  H04L1/00 ,  H04L1/06

CPC分类号： H04W72/082 ,  H04L1/0003 ,  H04L1/0606

摘要： Communications by base stations in wireless communication networks may be coordinated in a manner to improve performance by mobile devices experiencing interference from non-serving base stations. In particular, base station communications may be coordinated to improve the performance of interference cancellation by mobile devices. If a user equipment (UE) experiencing interference is capable of interference cancellation, then the base stations may coordinate to increase interference to that user equipment so as to improve that UE's ability to perform interference cancellation. Base stations may also coordinate to reduce interference for a UE, regardless of the UE's ability to perform interference cancellation. Mobile device performance improvements may also be achieved by coordinating scheduling of resources by the non-serving base stations, by using communication formats compatible with interference cancellation, by spatial coordination.

摘要翻译： 无线通信网络中的基站的通信可以以改善经历来自非服务基站的干扰的移动设备的性能的方式进行协调。 特别地，可以协调基站通信以改善移动设备的干扰消除的性能。 如果遇到干扰的用户设备（UE）能够进行干扰消除，则基站可以进行协调，以增加对该用户设备的干扰，从而提高UE执行干扰消除的能力。 无论UE是否执行干扰消除的能力，基站还可以协调以减少对UE的干扰。 还可以通过使用通过空间协调使用与干扰消除兼容的通信格式来协调非服务基站的资源调度来实现移动设备性能改进。

公开(公告)号：US09392608B2

公开(公告)日：2016-07-12

申请号：US13085373

申请日：2011-04-12

申请人： Osok Song ,  Aleksandar Damnjanovic ,  Tingfang Ji ,  Taesang Yoo ,  Parag Arun Agashe ,  Madhavan Srinivasan Vajapeyam ,  Yongbin Wei ,  Tao Luo ,  Rajat Prakash ,  Masato Kitazoe

发明人： Osok Song ,  Aleksandar Damnjanovic ,  Tingfang Ji ,  Taesang Yoo ,  Parag Arun Agashe ,  Madhavan Srinivasan Vajapeyam ,  Yongbin Wei ,  Tao Luo ,  Rajat Prakash ,  Masato Kitazoe

IPC分类号： H04W72/00 ,  H04W72/08

CPC分类号： H04W72/082 ,  H04W72/08

摘要： Methods and apparatus for partitioning resources for enhanced inter-cell interference coordination (eICIC) are provided. Certain aspects involve broadcasting a message indicating time-domain resource partitioning information (RPI), where a user equipment (UE) may be operating in idle mode. With the RPI, the UE may be able to identify protected resources with reduced/eliminated interference from neighboring cells. The RPI in this broadcasted message may be encoded as a bitmap as an alternative or in addition to enumeration of the U/N/X subframes. Other aspects entail transmitting a dedicated or unicast message indicating the time-domain RPI, where a UE may be operating in connected mode. With the RPI, the UE may be able to determine channel state information (CSI), make radio resource management (RRM) measurements, or perform radio link monitoring (RLM), based on one or more signals from a serving base station during the protected time-domain resources.

摘要翻译： 提供了用于分区资源以增强小区间干扰协调（eICIC）的方法和装置。 某些方面涉及广播指示时域资源划分信息（RPI）的消息，其中用户设备（UE）可以在空闲模式下操作。 利用RPI，UE可能能够识别来自相邻小区的减少/消除的干扰的受保护资源。 该广播消息中的RPI可以被编码为位图，作为U / N / X子帧的枚举的替代或补充。 其他方面需要发送指示时域RPI的专用或单播消息，其中UE可以在连接模式下操作。 利用RPI，UE可以在受保护的基站期间基于来自服务基站的一个或多个信号来确定信道状态信息（CSI），进行无线电资源管理（RRM）测量或执行无线电链路监视（RLM） 时域资源。

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。

公开(公告)号：US09130612B2

公开(公告)日：2015-09-08

申请号：US12349232

申请日：2009-01-06

申请人： Byoung-Hoon Kim ,  Taesang Yoo

发明人： Byoung-Hoon Kim ,  Taesang Yoo

IPC分类号： H04L27/28 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04B7/0413 ,  H04B7/0619 ,  H04B7/0671

摘要： Systems and methodologies are described that facilitate creating a unified format that can accommodate various MIMO modes. The unified format can employed with a single payload size that includes uplink control information for each available MIMO mode. By packaging the payload with uplink control information related to each MIMO mode, the uplink control information can be utilized with any suitable or available MIMO mode.

摘要翻译： 描述了有助于创建可以适应各种MIMO模式的统一格式的系统和方法。 统一格式可以采用单个有效载荷大小，其包括每个可用MIMO模式的上行链路控制信息。 通过利用与每个MIMO模式相关的上行链路控制信息封装有效载荷，可以利用任何合适的或可用的MIMO模式来利用上行链路控制信息。

公开(公告)号：US08934326B2

公开(公告)日：2015-01-13

申请号：US13467945

申请日：2012-05-09

申请人： Kapil Bhattad ,  Yi Huang ,  Tao Luo ,  Taesang Yoo

发明人： Kapil Bhattad ,  Yi Huang ,  Tao Luo ,  Taesang Yoo

IPC分类号： H04J1/12 ,  H04J11/00

CPC分类号： H04J11/005

摘要： Aspects of the disclosure are related to identifying whether an apparatus (e.g., base station, access point, etc.) is transmitting using a CRS based transmission scheme or a UE-RS based transmission scheme. Such detection may be necessary for PDSCH interference cancellation (IC) of a neighboring cell since a UE may not know which transmission scheme is used by the neighboring cell. For instance, the UE may know the transmission scheme of the serving cell, but the UE may not know the transmission scheme of a neighboring non-serving cell. As such, aspects of the disclosure provide for a blind detection algorithm to identify or determine a transmission mode or transmission scheme of a neighboring cell to then apply interference cancellation (IC) to an interfering signal received from the neighboring cell.

摘要翻译： 本公开的方面与识别装置（例如，基站，接入点等）是否正在使用基于CRS的传输方案或基于UE-RS的传输方案进行传输有关。 这样的检测对于相邻小区的PDSCH干扰消除（IC）可能是必要的，因为UE可能不知道相邻小区使用哪种传输方案。 例如，UE可以知道服务小区的传输方案，但是UE可能不知道相邻非服务小区的传输方案。 因此，本公开的方面提供盲检测算法来识别或确定相邻小区的传输模式或传输方案，然后将干扰消除（IC）应用于从相邻小区接收的干扰信号。

公开(公告)号：US08897236B2

公开(公告)日：2014-11-25

申请号：US13071145

申请日：2011-03-24

申请人： Taesang Yoo ,  Tao Luo ,  Yongbin Wei ,  Durga Prasad Malladi

发明人： Taesang Yoo ,  Tao Luo ,  Yongbin Wei ,  Durga Prasad Malladi

IPC分类号： H04W4/00 ,  H04J3/00 ,  H04L5/00 ,  H04W72/08

CPC分类号： H04L5/0053 ,  H04L5/0073 ,  H04W72/082

摘要： According to certain aspects, resource blocks used for physical downlink shared channel (PDSCH) transmissions may be allocated in a manner to manage interference in neighboring cells. According to certain aspects, one or more guard RBs may be utilized when transmitting PDSCH in a first cell an effort to reduce interference by transmissions in a second cell.

摘要翻译： 根据某些方面，可以以管理相邻小区中的干扰的方式来分配用于物理下行链路共享信道（PDSCH）传输的资源块。 根据某些方面，当在第一小区中发送PDSCH时，可以利用一个或多个保护RB来努力减少第二小区中的传输的干扰。

公开(公告)号：US08855000B2

公开(公告)日：2014-10-07

申请号：US13455906

申请日：2012-04-25

申请人： Siddhartha Mallik ,  Tao Luo ,  Taesang Yoo ,  Yongbin Wei

发明人： Siddhartha Mallik ,  Tao Luo ,  Taesang Yoo ,  Yongbin Wei

IPC分类号： H04W24/06 ,  H04B17/00

CPC分类号： H04B17/005 ,  H04B17/345

摘要： In a wireless communication system, interference on data tones is estimated by detecting data transmissions from interferers. An overall interference covariance matrix is estimated as a function of scalar traffic to pilot ratio (TPR) estimates, residual interference covariance estimates, and covariance of channel estimates of dominant interferers. The interference estimates are refined as a function of reliability based on a ratio of power received from a serving cell and power received from a dominant interferer.

摘要翻译： 在无线通信系统中，通过检测来自干扰源的数据传输来估计对数据音调的干扰。 估计总干扰协方差矩阵作为标量流量对导频比（TPR）估计，残差干扰协方差估计和主要干扰源信道估计的协方差的函数。 基于从服务小区接收的功率的比率和从主要干扰源接收的功率，将干扰估计作为可靠性的函数进行细化。