公开(公告)号：US09100843B2

公开(公告)日：2015-08-04

申请号：US13865693

申请日：2013-04-18

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Tao Luo ,  Xiaoxia Zhang ,  Ke Liu

IPC: H04Q9/00 ,  H04W24/00 ,  H04W56/00

CPC classification number: H04W24/00 ,  H04W56/00 ,  H04W56/0015 ,  H04W56/0035

Abstract: 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.

Abstract translation: 提供了一种用于无线通信的方法，装置和计算机程序产品，其中从一个或多个单元的定时导出系统定时，相对于估计的系统定时为多个单元确定定时偏移， 并且使用定时偏移来处理从多个单元接收的信号。 此外，提供了一种用于无线通信的方法，装置和计算机程序产品，其中从一个或多个单元的频率导出载波频率，相对于多个单元确定频率偏移 使用频率偏移来处理估计的系统定时和从多个小区接收的信号。

公开(公告)号：US20150180622A1

公开(公告)日：2015-06-25

申请号：US14532714

申请日：2014-11-04

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Siddhartha Mallik ,  Arumugam Chendamarai Kannan ,  Jelena Damnjanovic ,  Madhavan Srinivasan Vajapeyam ,  Jun Wang ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04L5/00 ,  H04J11/00

Abstract: Methods, systems, and devices are described for hierarchical communications and low latency support within a wireless communications system. An eNB and/or a UE may be configured to operate within the wireless communications system which is at least partially defined through a first layer with first layer transmissions having a first subframe type and a second layer with second layer transmissions having a second subframe type. The first subframe type may have a first round trip time (RTT) between transmission and acknowledgment of receipt of the transmission, and the second layer may have a second RTT that is less than the first RTT. Subframes of the first subframe type may be multiplexed with subframes of the second subframe type, such as through time division multiplexing. In some examples symbols of different duration may be multiplexed such that they different symbol durations coexist.

Abstract translation: 描述了无线通信系统中的分层通信和低延迟支持的方法，系统和设备。 eNB和/或UE可以被配置为在无线通信系统内操作，所述无线通信系统至少部分地通过具有第一子帧类型的第一层传输的第一层定义，而具有第二子帧类型的第二层传输的第二层。 第一子帧类型可以在传输和传输的接收确认之间具有第一往返时间（RTT），并且第二层可以具有小于第一RTT的第二RTT。 第一子帧类型的子帧可以与第二子帧类型的子帧复用，例如通过时分复用。 在一些示例中，可以复用不同持续时间的符号，使得它们不同的符号持续时间共存。

公开(公告)号：US08885567B2

公开(公告)日：2014-11-11

申请号：US13665302

申请日：2012-10-31

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Yongbin Wei ,  Durga Prasad Malladi ,  Taesang Yoo ,  Lu Zhao ,  Myriam Rajih ,  Hendrik Schoeneich

IPC: H04L12/28 ,  H04L25/03 ,  H04J11/00

CPC classification number: H04L25/03891 ,  H04J11/0023 ,  H04L25/03993

Abstract: A system for wireless communication reduces implementation complexity for symbol level interference cancellation as applied to physical control and data channels, such as the physical downlink shared channel (PDSCH) and physical downlink control channel (PDCCH). A user equipment (UE) categorizes tones of a signal into tone groups. A different noise whitening matrix is applied to each tone group for demodulation and decoding of the signal.

Abstract translation: 用于无线通信的系统降低了应用于诸如物理下行链路共享信道（PDSCH）和物理下行链路控制信道（PDCCH）的物理控制和数据信道的符号级干扰消除的实现复杂度。 用户设备（UE）将信号的音调分类为音调组。 将不同的噪声白化矩阵应用于每个音调组以进行信号的解调和解码。

公开(公告)号：US20140307703A1

公开(公告)日：2014-10-16

申请号：US14249119

申请日：2014-04-09

Applicant: QUALCOMM INCORPORATED

Inventor： Peter Gaal ,  Wanshi Chen ,  Tao Luo ,  Hao Xu ,  Taesang Yoo

IPC: H04L5/00 ,  H04W72/02

CPC classification number: H04L5/0073 ,  H04J11/005 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0048

Abstract: Methods, systems, and devices are described for interference cancellation/interference suppression (IC/IS) of neighbor cell transmissions. A UE may receive a downlink transmission from a base station and also receive interfering signals from one or more neighboring base stations. The UE may be configured to perform IC/IS operations on the interfering signals. In order to enhance IC/IS operations, the UE may evaluate whether resource bundling is used for the interfering signals. The UE may modify IC/IS operations for one or more subframes responsive to the evaluation. Modifying IC/IS operations may include, for example, using information related to the bundling at the neighboring base station(s) to cancel the interfering signals from the base station(s).

Abstract translation: 描述了用于相邻小区传输的干扰消除/干扰抑制（IC / IS）的方法，系统和设备。 UE可以从基站接收下行链路传输，并且还从一个或多个相邻基站接收干扰信号。 UE可以被配置为对干扰信号执行IC / IS操​​作。 为了增强IC / IS操​​作，UE可以评估是否将资源捆绑用于干扰信号。 UE可以响应于评估来修改针对一个或多个子帧的IC / IS操​​作。 修改IC / IS操​​作可以包括例如使用与相邻基站捆绑相关的信息来消除来自基站的干扰信号。

公开(公告)号：US20140269246A1

公开(公告)日：2014-09-18

申请号：US14248076

申请日：2014-04-08

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Tao Luo ,  Lu Zhao

IPC: H04J3/10

CPC classification number: H04L27/2691 ,  H04B15/00 ,  H04B17/345 ,  H04J3/10 ,  H04J11/0056 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0062 ,  H04L5/0073 ,  H04L25/0204 ,  H04L25/0224 ,  H04L27/2695 ,  H04W16/32 ,  H04W24/10

Abstract: A method to enhance coverage and/or throughput in a heterogeneous wireless network includes detecting interference between a neighboring cell and a serving cell. The method also includes cancelling the interference using an adaptive technique based on whether the interference has colliding Common Reference Signal (CRS) tones or whether the interference has colliding Dedicated Reference Signal (DRS) tones.

Abstract translation: 增强异构无线网络中的覆盖和/或吞吐量的方法包括检测相邻小区与服务小区之间的干扰。 该方法还包括基于干扰是否具有冲突的公共参考信号（CRS）音调或者干扰是否具有冲突的专用参考信号（DRS）音调的自适应技术来消除干扰。

公开(公告)号：US08837437B2

公开(公告)日：2014-09-16

申请号：US13713376

申请日：2012-12-13

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Taesang Yoo ,  Wanshi Chen ,  Peter Gaal ,  Yongbin Wei

IPC: H04B7/216 ,  H04W24/02 ,  H04L1/00 ,  H04L1/06 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04W24/02 ,  H04L1/0026 ,  H04L1/06 ,  H04L25/03305 ,  H04L27/2647 ,  H04L2025/03426

Abstract: Techniques for computing and reporting channel quality indication (CQI) are described. In an aspect, a plurality of CQI computation methods may be supported, and each CQI computation method may indicate how CQI should be computed. One CQI computation method may be selected for use. CQI may then be computed and reported in accordance with the selected CQI computation method. In an exemplary design, a user equipment (UE) may obtain a selected method for computing CQI, which may be chosen based on the UE capability and/or other factors. The selected method may specify (i) CQI computation for a specific codeword among a plurality of codewords or (ii) CQI computation by averaging signal quality across a plurality of layers used for transmission. The UE may compute CQI in accordance with the selected method, send the CQI to a base station, and receive data sent by the base station based on the CQI.

Abstract translation: 描述了用于计算和报告信道质量指示（CQI）的技术。 在一个方面，可以支持多个CQI计算方法，并且每个CQI计算方法可以指示如何计算CQI。 可以选择一种CQI计算方法来使用。 然后可以根据所选择的CQI计算方法来计算和报告CQI。 在示例性设计中，用户设备（UE）可以获得用于计算CQI的所选择的方法，其可以基于UE能力和/或其他因素来选择。 所选择的方法可以指定（i）针对多个码字中的特定码字的CQI计算，或者（ii）通过用于传输的多个层平均信号质量的CQI计算。 UE可以根据所选择的方法计算CQI，向基站发送CQI，并且基于CQI接收由基站发送的数据。

公开(公告)号：US20140036838A1

公开(公告)日：2014-02-06

申请号：US14050896

申请日：2013-10-10

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Tao Luo ,  Kibeom Seong

IPC: H04L5/00

CPC classification number: H04L5/0058 ,  H04L1/0038 ,  H04L1/0039 ,  H04W48/12

Abstract: 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.

Abstract translation: 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。 然后，无线终端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：US20130273930A1

公开(公告)日：2013-10-17

申请号：US13914346

申请日：2013-06-10

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Taesang Yoo

IPC: H04W72/08

CPC classification number: H04W72/085 ,  H04B7/022 ,  H04B7/0626 ,  H04B17/24 ,  H04L1/0026 ,  H04W52/281 ,  H04W52/40 ,  H04W72/082

Abstract: When enabled with common reference signal interference cancelation, a user equipment (UE) may still compute a channel state feedback value with consideration of any canceled interfering neighboring signals. When the neighboring cells are determined to be transmitting data during the time for which the channel state feedback value is being computed, the UE is able to derive the channel state feedback value considering those canceled interfering signals. The UE determines whether each neighboring cell is transmitting during the designated time either by obtaining signals that indicate the transmission schedule of the neighboring cells or by detecting the transmission schedule, such as based on the power class of the neighboring cells. If the UE determines that the neighboring cells are transmitting data during this time period, the UE will compute the channel state feedback value including consideration of the canceled interfering signals.

Abstract translation: 当使用公共参考信号干扰消除时，用户设备（UE）仍可以考虑任何取消的干扰相邻信号来计算信道状态反馈值。 当在正在计算信道状态反馈值的时间内确定相邻小区正在发送数据时，UE能够导出考虑到那些被消除的干扰信号的信道状态反馈值。 UE通过获得指示相邻小区的传输调度的信号或者通过基于相邻小区的功率等级来检测传输调度来确定在指定时间期间每个相邻小区是否正在发射。 如果UE在该时间段期间确定相邻小区正在发送数据，则UE将计算包括考虑被消除的干扰信号的信道状态反馈值。

公开(公告)号：US20130128792A1

公开(公告)日：2013-05-23

申请号：US13743802

申请日：2013-01-17

Applicant: QUALCOMM INCORPORATED

Inventor： Ke Liu ,  Xiaoxia Zhang ,  Taesang Yoo

IPC: H04W4/08

CPC classification number: H04W4/08 ,  H04W74/008 ,  H04W74/0833 ,  H04W84/045 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

Abstract: Providing for access point assisted signal acquisition for heterogeneous access point wireless networks is described herein. By way of example, a closed subscriber group (CSG) base station, such as a home NodeB (HNB) can be configured to provide temporary, limited access to a UE that is not authorized to access the HNB. Upon receiving and rejecting an access probe, the HNB can negotiate with a surrounding macro network to provide service for the UE. Further, the HNB can forward signal acquisition data, to assist in proper decoding of pilot or synchronization signals of the macro network. In particular aspects, the HNB can reduce power or blank transmissions on reserved access resources to reduce interference for the UE. By these and other disclosed mechanisms, the HNB can assist a non-CSG subscriber to obtain network service, and mitigate interference effects due to proximity to the UE.

Abstract translation: 本文描述了为异构接入点无线网络提供接入点辅助信号采集。 作为示例，诸如家庭节点B（HNB）的封闭用户组（CSG）基站可以被配置为向未授权接入HNB的UE提供临时的受限访问。 接收和拒绝接入探测器后，HNB可以与周围的宏网络进行协商，为UE提供业务。 此外，HNB可以转发信号采集数据，以帮助宏网络的导频或同步信号的正确解码。 在具体方面，HNB可以在保留的接入资源上减少功率或空白传输，以减少对UE的干扰。 通过这些和其他公开的机制，HNB可以帮助非CSG用户获得网络服务，并且减轻由于靠近UE而产生的干扰效应。

公开(公告)号：US20130115987A1

公开(公告)日：2013-05-09

申请号：US13666325

申请日：2012-11-01

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Tao Luo ,  Hendrik Schoeneich ,  Myriam Rajih ,  Lu Zhao

IPC: H04B15/00 ,  H04W4/00

CPC classification number: H04L25/0328 ,  H04J11/0056 ,  H04L1/0048 ,  H04L25/03305

Abstract: Certain aspects of the present disclosure relate to a hybrid approach for Physical Downlink Shared Channel (PDSCH) Interference Cancellation (IC). In certain aspects, if the PDSCH information is known for a serving cell but not be known for interfering cell(s), a hybrid approach that involves using Codeword-level IC (CWIC) for the serving cell and using Symbol-level IC (SLIC) for the interfering cells may be used for better IC performance. The hybrid IC approach may start with a UE attempting to decode the serving cell PDSCH. If the decode is unsuccessful, the UE may perform CWIC for the serving cell followed by SLIC using the results of the CWIC stage. After the SLIC stage, the UE may attempt to decode the serving cell PDSCH again. The UE may perform multiple operations of this method until the serving cell PDSCH is successfully decoded or a maximum number of iterations is reached.

Abstract translation: 本公开的某些方面涉及物理下行链路共享信道（PDSCH）干扰消除（IC）的混合方法。 在某些方面，如果PDSCH信息对于服务小区而言是已知的，但对于干扰小区而言是不知道的，则涉及使用码流级IC（CWIC）用于服务小区并使用符号级IC（SLIC ）可以用于更好的IC性能。 混合IC方法可以从尝试对服务小区PDSCH进行解码的UE开始。 如果解码不成功，则UE可以使用CWIC级的结果为服务小区后跟SLIC执行CWIC。 在SLIC阶段之后，UE可以尝试再次对服务小区PDSCH进行解码。 UE可以执行该方法的多个操作，直到服务小区PDSCH成功解码或达到最大次数。