公开(公告)号：US10231199B2

公开(公告)日：2019-03-12

申请号：US15715072

申请日：2017-09-25

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Peter Gaal ,  Ke Liu ,  Arun Kannu

IPC: H04W56/00 ,  H04L27/26 ,  H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04L5/00

Abstract: Providing for secondary synchronization encoding utilizing a primary synchronization channel (P-SCH)-related scrambling code is described herein. Scrambled secondary synchronization codes (SSCs) can be assigned to multiple base stations of a radio access network (RAN). By way of example, PSC-based scrambling codes can be created from a plurality of M-sequences generated from a common polynomial expression. Further, an SSC codebook is provided that selects sequence pairs of a sequence matrix for generating SSCs. Selection can be based on transmission characteristics of resulting SSCs, providing reduced interference in planned, semi-planned and/or unplanned mobile deployments.

公开(公告)号：US20140161043A1

公开(公告)日：2014-06-12

申请号：US14181953

申请日：2014-02-17

Applicant: QUALCOMM Incorporated

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

IPC: H04W56/00

CPC classification number: H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

Abstract: 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.

Abstract translation: 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：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：US20130250793A1

公开(公告)日：2013-09-26

申请号：US13895215

申请日：2013-05-15

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Ke Liu ,  Tao Luo ,  Yongbin Wei

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H03G1/02 ,  H04L5/0053 ,  H04L25/0202 ,  H04L27/2601 ,  H04W84/045

Abstract: Methods and apparatuses are provided that include selecting reference signal (RS) or other tones to utilize in estimating a channel for decoding one or more channels. Where the RS tones are interfered by other base stations, interference cancelation can be performed over the RS tones. Since interference can vary over the tones, interference cancelation can yield RS tones of varying quality. Thus, a quality of each of the RS tones can be determined, and at least a subset of the RS tones can be selected for estimating a channel. Additionally or alternatively, the RS tones can be weighted or otherwise classified for performing channel estimation using the RS tones.

Abstract translation: 提供了包括选择参考信号（RS）或其他音调以用于估计用于解码一个或多个信道的信道的方法和装置。 在RS音调被其他基站干扰的情况下，可以通过RS音调进行干扰消除。 由于干扰可以在音调上变化，所以干扰消除可以产生质量不同的RS音调。 因此，可以确定每个RS音调的质量，并且可以选择RS音调的至少一个子集来估计频道。 附加地或替代地，可以对RS音调进行加权或分类，以便使用RS音调进行信道估计。

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：US20130095829A1

公开(公告)日：2013-04-18

申请号：US13650082

申请日：2012-10-11

Applicant: QUALCOMM INCORPORATED

Inventor： Kapil Bhattad ,  Alexei Yurievitch Gorokhov ,  Tingfang Ji ,  Ke Liu ,  Tao Luo ,  Xiliang Luo

IPC: H04W36/20

CPC classification number: H04W36/04 ,  H04B1/7107 ,  H04J11/0056 ,  H04W16/14 ,  H04W28/04 ,  H04W36/0083 ,  H04W36/08 ,  H04W48/20 ,  H04W68/02 ,  H04W84/045 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/22 ,  Y02D70/24 ,  Y02D70/40

Abstract: An idle mode UE can RACH to a cell different from the cell paging the UE. The UE can be allocated additional time to respond to all cells in the neighborhood to identify the cell in which to RACH. Interference cancellation can occur at different rates based on whether the UE is in connected mode or idle mode. The time to respond to the page can be a function of a paging cycle. Additionally, a variable bias may promote early handoff to lower power cells and late handoff to high power cells.