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：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：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：US08768359B2

公开(公告)日：2014-07-01

申请号：US13212812

申请日：2011-08-18

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

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

IPC分类号： H04W36/00 ,  H04B7/00

CPC分类号： H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

摘要： Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

摘要翻译： 描述了用于选择二次同步信号（SSS）检测的样本的方法和装置。 提供了多种替代方案用于高效的小区标识符检测。 在第一替代方案中，从采样间隔之间以不均匀的间隔对从小区接收的信号的多个突发进行采样，以确定用于小区识别的序列。 在第二替代方案中，从较强小区接收到的第一和第二信号的样本被取消，并且用于检测较弱小区的序列是通过减少从不重叠的较弱小区接收的第三信号的样本的影响来确定的 具有较强小区的主同步信号（PSS）或SSS。 在第三替代方案中，用于检测较弱小区的序列通过减少对应于来自较强小区的信号的高发射功率部分的任何采样突发的影响来确定。

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：US20120046056A1

公开(公告)日：2012-02-23

申请号：US13212812

申请日：2011-08-18

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

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

IPC分类号： H04B7/24

CPC分类号： H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

摘要： Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

摘要翻译： 描述了用于选择二次同步信号（SSS）检测的样本的方法和装置。 提供了多种替代方案用于高效的小区标识符检测。 在第一替代方案中，从采样间隔之间以不均匀的间隔对从小区接收的信号的多个突发进行采样，以确定用于小区识别的序列。 在第二替代方案中，从较强小区接收到的第一和第二信号的样本被取消，并且用于检测较弱小区的序列是通过减少从不重叠的较弱小区接收的第三信号的样本的影响来确定的 具有较强小区的主同步信号（PSS）或SSS。 在第三替代方案中，用于检测较弱小区的序列通过减少对应于来自较强小区的信号的高发射功率部分的任何采样突发的影响来确定。

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：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。