公开(公告)号：US09673945B2

公开(公告)日：2017-06-06

申请号：US13360348

申请日：2012-01-27

申请人： Stefan Geirhofer ,  Tao Luo ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Kapil Bhattad ,  Tingfang Ji

发明人： Stefan Geirhofer ,  Tao Luo ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Kapil Bhattad ,  Tingfang Ji

IPC分类号： H04W4/00 ,  H04L1/00 ,  H04L5/00 ,  H04L1/06 ,  H04W24/10 ,  H04B7/06 ,  H04L12/26 ,  H04L12/28 ,  H04J3/00 ,  H04W72/00 ,  H04B7/024

CPC分类号： H04L5/0051 ,  H04B7/024 ,  H04B7/0626 ,  H04L1/0026 ,  H04L1/0687 ,  H04L1/0693 ,  H04L5/0023 ,  H04L5/0048 ,  H04W24/10 ,  H04W72/042 ,  H04W84/042

摘要： Certain aspects of the present disclosure provide techniques for implicitly linking aperiodic channel state information (A-CSI) reports to CSI-reference signal (CSI-RS) resources. In an aspect, the UE may be instructed to report on specific CSI-RS resource(s) via explicit signaling in the UE grant. Other aspects disclose techniques for implicit CSI-RS resource selection by the UE that require fewer signaling resources. Instead of explicitly signaling CSI-RS resources to the UE, the UE may implicitly select CSI-RS resource for CSI feedback reporting based on information known to the UE, e.g. a subframe on which a reporting request is received. This may reduce the impact of the additional signaling in the UE grant.

公开(公告)号：US09559820B2

公开(公告)日：2017-01-31

申请号：US13359154

申请日：2012-01-26

申请人： Stefan Geirhofer ,  Tao Luo ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Kapil Bhattad ,  Tingfang Ji

发明人： Stefan Geirhofer ,  Tao Luo ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Kapil Bhattad ,  Tingfang Ji

IPC分类号： H04L12/22 ,  H04L5/00

CPC分类号： H04L5/0048

摘要： In macro/RRH setups, channel state information reference signals (CSI-RS) and demodulation reference signals (DM-RS) may be used to decouple control and data transmission. Data transmission (e.g. for LTE Rel 10 and beyond) may be based on CSI-RS and DM-RS, while control may be received from a different set of cells or TxPs via CRS. Certain aspects of the present disclosure introduce a reporting framework, in which configuration of data-serving cells/TxPs may be carried out based on CSI-RS. In certain aspects, a new concept of CSI-RS groups, i.e., a set of CSI-RS ports that a UE considers as one group for precoding matrix indicator (PMI)/channel quality indicator (CQI)/rank indicator (RI) reporting, may be defined.

摘要翻译： 在宏/ RRH设置中，可以使用信道状态信息参考信号（CSI-RS）和解调参考信号（DM-RS）来去耦合控制和数据传输。 数据传输（例如，对于LTE Rel 10及其以外）可以基于CSI-RS和DM-RS，而可以经由CRS从不同的小区集合或TxP接收控制。 本公开的某些方面引入了报告框架，其中可以基于CSI-RS来执行数据服务小区/ TxP的配置。 在某些方面，CSI-RS组的新概念，即UE认为一组用于预编码矩阵指示符（PMI）/信道质量指示符（CQI）/秩指示符（RI）报告）的一组CSI-RS端口 ，可以被定义。

公开(公告)号：US20130021926A1

公开(公告)日：2013-01-24

申请号：US13359154

申请日：2012-01-26

申请人： Stefan Geirhofer ,  Tao Luo ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Kapil Bhattad ,  Tingfang Ji

发明人： Stefan Geirhofer ,  Tao Luo ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Kapil Bhattad ,  Tingfang Ji

IPC分类号： H04W24/00 ,  H04W4/00

CPC分类号： H04L5/0048

摘要： In macro/RRH setups, channel state information reference signals (CSI-RS) and demodulation reference signals (DM-RS) may be used to decouple control and data transmission. Data transmission (e.g. for LTE Rel 10 and beyond) may be based on CSI-RS and DM-RS, while control may be received from a different set of cells or TxPs via CRS. Certain aspects of the present disclosure introduce a reporting framework, in which configuration of data-serving cells/TxPs may be carried out based on CSI-RS. In certain aspects, a new concept of CSI-RS groups, i.e., a set of CSI-RS ports that a UE considers as one group for precoding matrix indicator (PMI)/channel quality indicator (CQI)/rank indicator (RI) reporting, may be defined.

摘要翻译： 在宏/ RRH设置中，可以使用信道状态信息参考信号（CSI-RS）和解调参考信号（DM-RS）来去耦合控制和数据传输。 数据传输（例如，对于LTE Rel 10及其以外）可以基于CSI-RS和DM-RS，而可以经由CRS从不同的小区或TxP接收控制。 本公开的某些方面引入了报告框架，其中可以基于CSI-RS来执行数据服务小区/ TxP的配置。 在某些方面，CSI-RS组的新概念，即UE认为一组用于预编码矩阵指示符（PMI）/信道质量指示符（CQI）/秩指示符（RI）报告）的一组CSI-RS端口 ，可以被定义。

公开(公告)号：US20190379437A1

公开(公告)日：2019-12-12

申请号：US16476408

申请日：2018-02-05

申请人： Se Yong PARK ,  Wei ZENG ,  Alexandros MANOLAKOS ,  Sony AKKARAKARAN ,  Yi HUANG ,  Renqiu WANG ,  Hao XU ,  Yu ZHANG ,  Joseph Binamira SORIAGA ,  Tingfang JI ,  Peter GAAL ,  Qualcomm Incorporated

发明人： Se Yong Park ,  Wei Zeng ,  Alexandros Manolakos ,  Sony Akkarakaran ,  Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Yu Zhang ,  Joseph Binamira Soriago ,  Tingfang Ji ,  Peter Gaal

IPC分类号： H04B7/0456 ,  H04L27/26 ,  H04L5/00

摘要： Methods, systems, and devices for wireless communication are described that support a low peak-to-average power ratio (PAPR) precoded reference signal design for multiple-input, multiple-output (MIMO) transmissions. A user equipment (UE) may identify multiple sets of symbols associated with different reference signal waveforms, where each reference signal waveform may be associated with a low PAPR. In some cases, different single-carrier reference signal waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM) for a transmission on a single antenna. However, the addition of single-carrier waveforms through FDM for a transmission via an antenna may result in an uplink transmission having a high PAPR (e.g., as compared to single-carrier waveforms). The UE may reduce the PAPR of the uplink transmission by multiplexing the reference signal waveforms in the time domain (e.g., using time division multiplexing (TDM)).

公开(公告)号：US09258718B2

公开(公告)日：2016-02-09

申请号：US13401696

申请日：2012-02-21

申请人： Tingfang Ji ,  Ravi Palanki ,  Peter Gaal ,  Hao Xu ,  Yongbin Wei

发明人： Tingfang Ji ,  Ravi Palanki ,  Peter Gaal ,  Hao Xu ,  Yongbin Wei

IPC分类号： H04L12/66 ,  H04L12/56 ,  H04W24/02 ,  H04W64/00 ,  H04W72/04 ,  H04W88/08

CPC分类号： H04W64/00 ,  G01S1/20 ,  G01S5/02 ,  H04L5/0048 ,  H04W24/02 ,  H04W72/0406 ,  H04W72/042 ,  H04W72/0446 ,  H04W88/085

摘要： A method of wireless communication includes configuring a plurality of remote radio heads (RRHs) to prevent position location reference signal (PRS) transmissions on the same subframes where the macro eNodeB transmits PRS. The configured RRHs each have a same physical cell identity (PCI) as the macro eNodeB. The RRHs communicating in accordance with the configuration.

摘要翻译： 无线通信的方法包括配置多个远程无线电头（RRH），以防止在宏eNodeB发送PRS的相同子帧上的位置定位参考信号（PRS）传输。 配置的RRH每个具有与宏eNodeB相同的物理小区标识（PCI）。 RRH根据配置进行通信。

公开(公告)号：US20130051317A1

公开(公告)日：2013-02-28

申请号：US13401696

申请日：2012-02-21

申请人： Tingfang Ji ,  Ravi Palanki ,  Peter Gaal ,  Hao Xu ,  Yongbin Wei

发明人： Tingfang Ji ,  Ravi Palanki ,  Peter Gaal ,  Hao Xu ,  Yongbin Wei

IPC分类号： H04W4/00

CPC分类号： H04W64/00 ,  G01S1/20 ,  G01S5/02 ,  H04L5/0048 ,  H04W24/02 ,  H04W72/0406 ,  H04W72/042 ,  H04W72/0446 ,  H04W88/085

摘要： A method of wireless communication includes configuring a plurality of remote radio heads (RRHs) to prevent position location reference signal (PRS) transmissions on the same subframes where the macro eNodeB transmits PRS. The configured RRHs each have a same physical cell identity (PCI) as the macro eNodeB. The RRHs communicating in accordance with the configuration.

摘要翻译： 无线通信的方法包括配置多个远程无线电头（RRH），以防止在宏eNodeB发送PRS的相同子帧上的位置定位参考信号（PRS）传输。 配置的RRH每个具有与宏eNodeB相同的物理小区标识（PCI）。 RRH根据配置进行通信。

公开(公告)号：US20130028182A1

公开(公告)日：2013-01-31

申请号：US13360348

申请日：2012-01-27

申请人： Stefan Geirhofer ,  Tao Luo ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Kapil Bhattad ,  Tingfang Ji

发明人： Stefan Geirhofer ,  Tao Luo ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Kapil Bhattad ,  Tingfang Ji

IPC分类号： H04W4/00

CPC分类号： H04L5/0051 ,  H04B7/024 ,  H04B7/0626 ,  H04L1/0026 ,  H04L1/0687 ,  H04L1/0693 ,  H04L5/0023 ,  H04L5/0048 ,  H04W24/10 ,  H04W72/042 ,  H04W84/042

摘要： Certain aspects of the present disclosure provide techniques for implicitly linking aperiodic channel state information (A-CSI) reports to CSI-reference signal (CSI-RS) resources. In an aspect, the UE may be instructed to report on specific CSI-RS resource(s) via explicit signaling in the UE grant. Other aspects disclose techniques for implicit CSI-RS resource selection by the UE that require fewer signaling resources. Instead of explicitly signaling CSI-RS resources to the UE, the UE may implicitly select CSI-RS resource for CSI feedback reporting based on information known to the UE, e.g. a subframe on which a reporting request is received. This may reduce the impact of the additional signaling in the UE grant.

摘要翻译： 本公开的某些方面提供了将非周期性信道状态信息（A-CSI）报告隐含地链接到CSI参考信号（CSI-RS）资源的技术。 在一方面，可以指示UE通过UE授权中的显式信令来报告特定的CSI-RS资源。 其他方面公开了由UE需要较少信令资源的隐性CSI-RS资源选择技术。 代替将CSI-RS资源明确地发送给UE，UE可以基于UE已知的信息，例如隐含地选择用于CSI反馈报告的CSI-RS资源。 接收报告请求的子帧。 这可以减少UE授权中附加信令的影响。

公开(公告)号：US20120213108A1

公开(公告)日：2012-08-23

申请号：US13401557

申请日：2012-02-21

申请人： Tingfang Ji ,  Peter Gaal ,  Hao Xu ,  Osok Song

发明人： Tingfang Ji ,  Peter Gaal ,  Hao Xu ,  Osok Song

IPC分类号： H04W74/08 ,  H04W4/06 ,  H04W24/00

CPC分类号： H04B7/024

摘要： Wireless networks may include remote radio heads (RRHs) for extending the coverage of a macro cell. The macro cell may be connected to the RRHs, for example, by optical fiber, and there may be negligible latency between the macro cell and the RRHs. RRH deployment with different cell specific RS transmissions may create many cell edges, which may present challenges in idle state mobility. Certain aspects of the present disclosure may utilize coordinated multipoint (CoMP) transmissions for idle user equipment (UE) support and, in some aspects, may introduce new radio link monitoring (RLM) techniques. As a result, the techniques presented herein may help achieve better idle mode performance and/or better RLM performance.

摘要翻译： 无线网络可以包括用于扩展宏小区的覆盖的远程无线电头（RRH）。 宏小区可以例如通过光纤连接到RRH，并且在宏小区和RRH之间可能存在可忽略的等待时间。 具有不同小区特定RS传输的RRH部署可能产生许多小区边缘，这可能在空闲状态移动性方面存在挑战。 本公开的某些方面可以利用用于空闲用户设备（UE）支持的协调多点（CoMP）传输，并且在一些方面可以引入新的无线电链路监视（RLM）技术。 因此，本文介绍的技术有助于实现更好的空闲模式性能和/或更好的RLM性能。

公开(公告)号：US20130021954A1

公开(公告)日：2013-01-24

申请号：US13550834

申请日：2012-07-17

申请人： Juan Montojo ,  Peter Gaal ,  Wanshi Chen ,  Hao Xu ,  Tao Luo

发明人： Juan Montojo ,  Peter Gaal ,  Wanshi Chen ,  Hao Xu ,  Tao Luo

IPC分类号： H04L5/14

CPC分类号： H04L5/16 ,  H04L5/0028 ,  H04L5/0037 ,  H04L5/0055 ,  H04L5/006 ,  H04L5/0085 ,  H04L5/0092 ,  H04L5/14 ,  H04W72/0453 ,  H04W72/048 ,  H04W72/10

摘要： Half-duplex (HD) operations enable low cost implementations of LTE terminals. Traditionally, HD operations may be linked to a particular frequency band which may not allow a mix of full-duplex (FD) and HD terminals in the same frequency band. Therefore, certain aspects of the present disclosure provide techniques for enabling coexistence, in a given frequency band, of HD and FD terminals, by introducing frequency bands designated for HD operation and overlapping existing frequency bands designated for FD operation.

公开(公告)号：US20090221289A1

公开(公告)日：2009-09-03

申请号：US12365872

申请日：2009-02-04

申请人： Hao Xu ,  Juan Montojo ,  Durga Prasad Malladi ,  Peter Gaal

发明人： Hao Xu ,  Juan Montojo ,  Durga Prasad Malladi ,  Peter Gaal

IPC分类号： H04W60/00 ,  H04K1/10

CPC分类号： H04L1/0023 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0091

摘要： Systems and methodologies are described that facilitate signaling and detecting discontinuous transmission (DTX) in a wireless communication environment. A DTX indicator and Channel Quality Indicator (CQI) feedback can be multiplexed within a common uplink control channel subframe and transmitted to a base station when the access terminal is operating in DTX mode for an Acknowledgement Channel. Further, when operating in non-DTX mode, the access terminal can multiplex an ACK indicator or a NAK indicator with the CQI feedback within a common uplink control channel subframe, which can thereafter be transferred to the base station. Accordingly, the base station can detect DTX operation or non-DTX operation of the access terminal. For example, reference signal symbols can carry one of the DTX indicator, the ACK indicator, or the NAK indicator. Pursuant to another example, the CQI feedback and the DTX indicator can be combined and carried jointly by non-reference signal symbols.

摘要翻译： 描述了在无线通信环境中促进信令和检测不连续传输（DTX）的系统和方法。 DTX指示符和信道质量指示符（CQI）反馈可以在公共上行链路控制信道子帧内多路复用，并且当接入终端以确认信道的DTX模式工作时被发送到基站。 此外，当在非DTX模式下操作时，接入终端可以在公共上行链路控制信道子帧内将ACK指示符或NAK指示符与CQI反馈复用，然后可以将其传送到基站。 因此，基站可以检测接入终端的DTX操作或非DTX操作。 例如，参考信号符号可以携带DTX指示符，ACK指示符或NAK指示符之一。 根据另一示例，CQI反馈和DTX指示符可以由非参考信号符号组合和携带。