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。

公开(公告)号：US08724563B2

公开(公告)日：2014-05-13

申请号：US12860747

申请日：2010-08-20

申请人： Taesang Yoo ,  Tao Luo ,  Kibeom Seong

发明人： Taesang Yoo ,  Tao Luo ,  Kibeom Seong

IPC分类号： H04W4/00

CPC分类号： H04L5/0058 ,  H04L1/0038 ,  H04L1/0039 ,  H04W48/12

摘要： Aspects are disclosed for detecting a system information block (SIB) within a heterogeneous network. In one aspect, a type of scheduling information pertaining to an SIB is selected, and a parameter known to a wireless terminal is associated with the type of scheduling information. The wireless terminal then decodes the SIB by deriving the scheduling information from the known parameters, without having to decode a Physical Downlink Control Channel.

摘要翻译： 公开了用于检测异构网络内的系统信息块（SIB）的方面。 一方面，选择与SIB有关的调度信息的种类，将无线终端所知的参数与调度信息的种类相关联。 无线终端然后通过从已知参数导出调度信息来对SIB进行解码，而不必解码物理下行链路控制信道。

公开(公告)号：US20120057480A1

公开(公告)日：2012-03-08

申请号：US13225121

申请日：2011-09-02

申请人： Taesang Yoo ,  Siddhartha Mallik ,  Tao Luo

发明人： Taesang Yoo ,  Siddhartha Mallik ,  Tao Luo

IPC分类号： H04W72/04 ,  H04W24/00

CPC分类号： H04W72/082 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/005 ,  H04L5/006 ,  H04L5/0073 ,  H04W16/32 ,  H04W72/0413

摘要： Communication in a dominant interference scenario may be supported by performing inter-cell interference coordination (ICIC). According to certain aspects of ICIC, resource coordination/partitioning may be performed to allocate resources to a serving Node B located near the vicinity of a strong interfering Node B. The interfering Node B may avoid transmitting on the allocated/protected resources, but transmissions from the interfering Node B on resources not allocated to the serving Node B (i.e., unprotected) may cause significant interference on cell-specific reference signal (CRS) tones of the serving Node B. Therefore, if the CRS tones of the unallocated/unprotected resources are used, performance degradation may result to various operations of the serving Node B. Therefore, certain aspects of the present disclosure provide techniques for a UE receiver in utilizing resource partitioning information (RPI) for performing CRS processing in a heterogeneous network (HetNet).

摘要翻译： 可以通过执行小区间干扰协调（ICIC）来支持主要干扰场景中的通信。 根据ICIC的某些方面，可以执行资源协调/划分以向位于强干扰节点B附近的服务节点B分配资源。干扰节点B可以避免在所分配/受保护资源上的传输， 干扰节点B对未分配给服务节点B的资源（即未受保护的）可能对服务节点B的小区特定参考信号（CRS）音调造成显着干扰。因此，如果未分配/未受保护的资源的CRS音调 性能下降可能导致服务节点B的各种操作。因此，本公开的某些方面在利用用于在异构网络（HetNet）中执行CRS处理的资源划分信息（RPI）的情况下为UE接收机提供技术。

公开(公告)号：US09042240B2

公开(公告)日：2015-05-26

申请号：US12845649

申请日：2010-07-28

申请人： Tao Luo ,  Taesang Yoo ,  Kibeom Seong

发明人： Tao Luo ,  Taesang Yoo ,  Kibeom Seong

IPC分类号： H04L27/06 ,  H04L1/00 ,  H04W48/16

CPC分类号： H04L1/0038 ,  H04W48/16

摘要： Techniques for reliable channel decoding in a wireless network are provided. In one aspect, a wireless device receives system information over a physical broadcast channel of a downlink transmission. The wireless device decodes the physical broadcast channel of a current radio frame using a plurality of hypotheses until the decoding passes a cyclic redundancy check. Thereafter, the wireless device compares system information from the current radio frame with information obtained from a previous radio frame. The information from the previous radio frame may include one or more network parameters which may be stored in a memory of the wireless device. In some aspects, the comparison may be performed over a plurality of radio frames. Based at least in part on a result of the comparing, the wireless device may selectively reject system information from one or more of the radio frames.

摘要翻译： 提供了一种在无线网络中进行可靠信道解码的技术。 在一个方面，无线设备通过下行链路传输的物理广播信道接收系统信息。 无线设备使用多个假设来解码当前无线电帧的物理广播信道，直到解码通过循环冗余校验。 此后，无线设备将来自当前无线电帧的系统信息与从先前无线电帧获得的信息进行比较。 来自先前无线电帧的信息可以包括可以存储在无线设备的存储器中的一个或多个网络参数。 在一些方面，可以在多个无线电帧上执行比较。 至少部分地基于比较的结果，无线设备可以选择性地从一个或多个无线电帧中拒绝系统信息。

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：US08718154B2

公开(公告)日：2014-05-06

申请号：US12620866

申请日：2009-11-18

申请人： Taesang Yoo ,  Peter Gaal ,  Tao Luo

发明人： Taesang Yoo ,  Peter Gaal ,  Tao Luo

IPC分类号： H04L27/28

CPC分类号： H04L27/2673 ,  H04L27/2665

摘要： Providing for improved tracking and correction of timing in wireless communications is disclosed herein. By way of example, a first algorithm can be employed to track timing of a wireless signal, based on one dimension of the signal. Additionally, a second algorithm based on a different dimension of the signal can be employed to verify the timing and reduce errors in timing analysis. Various signal dimensions can be employed for the analysis, including cyclic prefix, frequency, channel impulse response, or the like, or a combination thereof. Additionally, different channels of the wireless signal can also be analyzed by the first algorithm and the second algorithm. Furthermore, the second algorithm can be selected to reduce deficiencies identified in the first algorithm, to improve overall timing analysis, reduce undetected timing errors or false errors, and improve timing correction.

摘要翻译： 本文公开了提供无线通信中的改进的定时跟踪和校正。 作为示例，可以采用第一算法来基于信号的一个维度来跟踪无线信号的定时。 另外，可以采用基于信号的不同维度的第二算法来验证定时并减少定时分析中的误差。 可以采用各种信号尺寸进行分析，包括循环前缀，频率，信道脉冲响应等，或其组合。 此外，无线信号的不同信道也可以通过第一算法和第二算法进行分析。 此外，可以选择第二算法以减少在第一算法中识别的缺陷，以改善总体时序分析，减少未检测到的定时误差或错误误差，并且改善定时校正。

公开(公告)号：US08712401B2

公开(公告)日：2014-04-29

申请号：US13084806

申请日：2011-04-12

申请人： Taesang Yoo ,  Tao Luo ,  Xiliang Luo

发明人： Taesang Yoo ,  Tao Luo ,  Xiliang Luo

IPC分类号： H04W24/00 ,  H04W72/04

CPC分类号： H04W24/08 ,  H04B17/318 ,  H04B17/327 ,  H04B17/382 ,  H04L5/005 ,  H04L5/0094 ,  H04L25/02 ,  H04W24/00 ,  H04W72/04 ,  H04W72/042

摘要： A method for communicating in an advanced long term evolution (LTE-A) network using common reference signal (CRS) resources associated with different interference levels due to resource partitioning is disclosed. Signals are received from an eNodeB indicating a subset of CRS resources for radio link monitoring (RLM) and/or reference signal received power (RSRP) measuring. The subset of CRS resources includes the CRS resources expected to have lower interference from the interfering eNodeBs. RLM and/or RSRP measurements are performed based on the indicated subset.

摘要翻译： 公开了一种使用由于资源划分引起的与不同干扰电平相关联的共同参考信号（CRS）资源在高级长期演进（LTE-A）网络中进行通信的方法。 从指示用于无线电链路监视（RLM）和/或参考信号接收功率（RSRP）测量的CRS资源的子集的eNodeB接收信号。 CRS资源的子集包括预期来自干扰eNodeB的较低干扰的CRS资源。 基于所指示的子集执行RLM和/或RSRP测量。

公开(公告)号：US08688163B2

公开(公告)日：2014-04-01

申请号：US12976499

申请日：2010-12-22

申请人： Wanshi Chen ,  Peter Gaal ,  Juan Montojo ,  Taesang Yoo ,  Xiliang Luo ,  Tao Luo ,  Yongbin Wei ,  Naga Bhushan

发明人： Wanshi Chen ,  Peter Gaal ,  Juan Montojo ,  Taesang Yoo ,  Xiliang Luo ,  Tao Luo ,  Yongbin Wei ,  Naga Bhushan

IPC分类号： H04B7/00

CPC分类号： H04W52/367 ,  H04W52/146 ,  H04W52/262 ,  H04W52/362

摘要： Methods and apparatus in a wireless communication system are described for receiving and processing transmit power control commands, where, for example, the response to the transmit power control commands is conditionally decoupled from at least one of a transmit bandwidth parameter, a transport format parameter and a power stepsize limit. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims.

摘要翻译： 描述了用于接收和处理发射功率控制命令的无线通信系统中的方法和装置，其中例如对发射功率控制命令的响应有条件地从发射带宽参数，传输格式参数和 功率限幅。 本摘要仅用于遵守允许读者快速确定所披露的主题的抽象要求规则。 因此，应当理解，它不应用于解释或限制权利要求书的范围或含义。

公开(公告)号：US08576742B2

公开(公告)日：2013-11-05

申请号：US13251990

申请日：2011-10-03

申请人： Taesang Yoo ,  Tao Luo ,  Siddhartha Mallik ,  Aleksandar Damnjanovic ,  Juan Montojo

发明人： Taesang Yoo ,  Tao Luo ,  Siddhartha Mallik ,  Aleksandar Damnjanovic ,  Juan Montojo

IPC分类号： H04L12/26

CPC分类号： H04L25/03

摘要： Communication in a dominant interference scenario may be supported by performing inter-cell interference coordination (ICIC). Resource coordination/partitioning may be performed to allocate resources to a serving Node B located near the vicinity of a strong interfering Node B. The interfering Node B may avoid transmitting on the allocated/protected resources, possibly except for a common reference signal (CRS). A UE can then communicate with the serving Node B on the protected resources in the presence of the interfering Node B and may observe no interference (possibly except for the CRS) from the interfering Node B. When CRS tones of an interferer may collide with control/data tones of a serving cell, CRS interference cancellation (CRS IC) or puncturing of interfered resource elements (REs) may be appropriate. Certain aspects of the present disclosure provide techniques, where the UE may dynamically switch between CRS IC and RE puncturing based on certain parameters.

摘要翻译： 可以通过执行小区间干扰协调（ICIC）来支持主要干扰场景中的通信。 可以执行资源协调/分区以向位于强干扰节点B附近的服务节点B分配资源。干扰节点B可以避免在所分配/受保护的资源上发送，可能除了公共参考信号（CRS） 。 然后，UE可以在干扰节点B的存在下与被保护资源上的服务节点B进行通信，并且可以观察到来自干扰节点B的干扰（可能除了CRS之外）。当干扰源的CRS音调可能与控制相冲突时 /服务小区的数据音调，CRS干扰消除（CRS IC）或干扰的资源元素（RE）的穿孔可能是适当的。 本公开的某些方面提供技术，其中UE可以基于某些参数在CRS IC和RE穿孔之间动态切换。

公开(公告)号：US20130107785A1

公开(公告)日：2013-05-02

申请号：US13447067

申请日：2012-04-13

申请人： Kapil Bhattad ,  Tao Luo ,  Taesang Yoo ,  Shivratna G. Srinivasan

发明人： Kapil Bhattad ,  Tao Luo ,  Taesang Yoo ,  Shivratna G. Srinivasan

IPC分类号： H04W4/00 ,  H04H20/71

CPC分类号： H04L27/2665 ,  H04J11/005 ,  H04L27/2675 ,  H04L27/2688 ,  H04L27/2691

摘要： A method, an apparatus, and a computer program product for wireless communication are provided for maintaining a time tracking loop (TTL) to increase an overall signal-to-noise ratio (SNR) of a signal. The signal includes a series of consecutive symbols, received via multiple signal paths with different delays in a subframe. When attempting to decode the signal, only part of a symbol for a signal path may be captured in a fast Fourier transform (FFT) window due to the multiple signal path delays, leading to inter-channel interference (ICI), inter-symbol interference (ISI), and/or power loss. The SNR may be increased by optimizing a FFT window position when decoding the signal. An optimal FFT window position may be based on a subframe type. Moreover, the SNR may be increased by performing a linear operation on samples of the symbol prior to performing the FFT.

摘要翻译： 提供了一种用于无线通信的方法，装置和计算机程序产品，用于维持时间跟踪环（TTL）以增加信号的总体信噪比（SNR）。 该信号包括一系列连续符号，通过在子帧中具有不同延迟的多个信号路径接收。 当尝试对信号进行解码时，由于多路信号路径延迟，只能在快速傅里叶变换（FFT）窗口中捕获信号路径的一部分符号，从而导致信道间干扰（ICI），符号间干扰 （ISI）和/或功率损耗。 可以通过在对信号进行解码时优化FFT窗口位置来增加SNR。 最佳FFT窗口位置可以基于子帧类型。 此外，可以通过对执行FFT之前的符号的采样执行线性运算来增加SNR。