公开(公告)号：US09693323B2

公开(公告)日：2017-06-27

申请号：US14922724

申请日：2015-10-26

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Tao Luo ,  Srinivas Yerramalli

IPC: H04W52/34 ,  H04L5/00 ,  H04L27/00

CPC classification number: H04W52/346 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/0006 ,  H04W74/0808

Abstract: Multi-channel channel state information (CSI) design is disclosed for long term evolution (LTE)/LTE-Advanced (LTE-A) systems with unlicensed spectrum. A “reference” CSI process defined for each channel/carrier. The reference CSI process is defined across each channel in any particular band that the transmitter is configured to support. The transmit power for such reference CSI processes is spread equally over each such channel. In order to report CSI for a subset of channels under an unequal power split assumption, a user equipment (UE) may apply a different power offset in the computation of the CSI process. Alternatively, an auxiliary CSI process may be defined for reporting CSI of a subset of channels with unequal distribution of powers across different channels in a band.

公开(公告)号：US09681325B2

公开(公告)日：2017-06-13

申请号：US14551927

申请日：2014-11-24

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Durga Prasad Malladi ,  Tao Luo ,  Peter Gaal ,  Yongbin Wei ,  Hao Xu ,  Tingfang Ji ,  Srinivas Yerramalli ,  Naga Bhushan ,  Aleksandar Damnjanovic

IPC: H04W24/10 ,  H04L1/00 ,  H04L5/00 ,  H04W16/14

CPC classification number: H04W24/10 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/1812 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0053 ,  H04W16/14

Abstract: Channel and interference measurement in long term evolution (LTE)/LTE-Advanced (LTE-A) networks including unlicensed spectrum is discussed in which a user equipment (UE) detects a reference signal from a serving base station over a carrier of a shared spectrum for measurement. The reference signal may be a channel usage beacon signal (CUBS) transmitted by the serving base station prior to transmission or may be a specific channel state information (CSI) reference signal transmitted in the first subframe of a transmission frame. The UE generates a fast CSI feedback report based on the measured reference signal and transmits it to the serving base station. The fast CSI feedback report is received quickly enough by the serving base station such that the base station may apply the CSI feedback to additional transmissions in subsequent subframes within the same transmission frame.

公开(公告)号：US20170135128A1

公开(公告)日：2017-05-11

申请号：US15336509

申请日：2016-10-27

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Xiaoxia Zhang ,  Peter Gaal

IPC: H04W74/00 ,  H04W72/14 ,  H04W74/08

Abstract: Solutions to problems from delays in channel acquisition by UEs in a contention-based shared radio frequency spectrum band are disclosed. For example, if an eNB knows of a recent or ongoing downlink transmission on a frequency to be used for uplink transmission by a UE, then the eNB may instruct the UE to either skip performance of LBT on that frequency or else perform a type of LBT that is shorter in duration than a full CCA. One way for the eNB to instruct the UE in this fashion is to set an indicator in an uplink grant transmitted to the UE on another frequency. Additionally, in order to avoid truncation of an uplink transmission opportunity, an eNB may notify a UE that an uplink grant is valid for more than one starting point.

公开(公告)号：US20170048860A1

公开(公告)日：2017-02-16

申请号：US15230042

申请日：2016-08-05

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Qingsi Wang ,  Maarten Menzo Wentink ,  Marco Papaleo ,  Srinivas Yerramalli ,  Onkar Jayant Dabeer

IPC: H04W72/04 ,  H04W74/08 ,  H04W16/14 ,  H04L5/00

CPC classification number: H04W72/0453 ,  H04L5/0007 ,  H04W16/14 ,  H04W72/1215 ,  H04W72/1231 ,  H04W74/02 ,  H04W74/0808 ,  H04W74/085 ,  H04W88/02 ,  H04W88/10

Abstract: Techniques for adjusting a contention window (CW) for transmissions in a shared radio frequency spectrum band may include identifying a number of nodes attempting to transmit using a channel of a shared radio frequency spectrum band and determining a target CW based on the number of nodes attempting to transmit. A new CW value may then be determined based on a prior CW value and the target CW value, and a listen-before-talk (LBT) procedure (e.g., a clear channel assessment (CCA)) to access the channel of the shared radio frequency spectrum band may be performed to access the channel.

Abstract translation: 用于调整共享射频频带中的传输的竞争窗口（CW）的技术可以包括：使用共享射频频带的信道来尝试发送的节点数量，并且基于节点数目来确定目标CW 发送。 然后可以基于先前的CW值和目标CW值以及用于访问共享无线电的信道的即时通话（LBT）过程（例如，清除信道评估（CCA））来确定新的CW值 可以执行频谱带以访问信道。

公开(公告)号：US09531512B2

公开(公告)日：2016-12-27

申请号：US14501929

申请日：2014-09-30

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Wanshi Chen ,  Durga Prasad Malladi ,  Yongbin Wei ,  Naga Bhushan ,  Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Tingfang Ji ,  Peter Gaal

IPC: H04L5/00 ,  H04B7/04 ,  H04B7/06 ,  H04W72/04 ,  H04J11/00 ,  H04B7/02 ,  H04W74/08 ,  H04W72/06

CPC classification number: H04L5/0035 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0608 ,  H04B7/0626 ,  H04J11/0053 ,  H04L5/0053 ,  H04W72/0426 ,  H04W72/0446 ,  H04W72/06 ,  H04W74/0808

Abstract: Techniques are described for downlink coordinated multi-point (CoMP) procedures for access to a contention-based radio frequency spectrum band. A base station performs a contention procedure, such as a clear channel assessment (CCA) procedure, for access to the radio frequency spectrum band. The base station determines whether contention has been won for a time period, and communicates whether or not contention has been won to other base stations in a CoMP cooperating set. Based on the information exchanged between base stations in the CoMP cooperating set, coordinated communications is initiated to a UE with two or more of the base stations in the CoMP cooperating set.

Abstract translation: 描述了用于接入基于争用的射频频带的下行链路协调多点（CoMP）过程的技术。 基站执行竞争程序，例如清除信道评估（CCA）过程，用于接入射频频带。 基站确定是否已经赢了一段时间的争用，并且在CoMP协作集合中通信竞争是否已经被赢得到其他基站。 基于CoMP协作集中的基站之间交换的信息，在具有CoMP协作集中的两个或多个基站的UE发起协调通信。

公开(公告)号：US09510222B2

公开(公告)日：2016-11-29

申请号：US14465560

申请日：2014-08-21

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Naga Bhushan ,  Peter Gaal

IPC: H04W24/08 ,  H04W16/14 ,  H04W72/12 ,  H04B17/00 ,  H04B17/345 ,  H04W88/06

CPC classification number: H04W24/00 ,  H04B17/00 ,  H04B17/318 ,  H04B17/345 ,  H04W16/14 ,  H04W88/06

Abstract: Methods, systems, and devices are described for detection of one or more interfering signals in a particular frequency spectrum. Signal characteristics may be identified for a signal of interest in the spectrum, such as a signal that is desired to be received at a wireless communications device. Based at least in part on the characteristics, one or more interference detection opportunities may be identified, during which interfering signals in the spectrum may be detected. Interference detection opportunities may include, for example, periods when the signal of interest may be absent from the particular frequency spectrum. Transmissions in the frequency spectrum may be monitored during the interference detection opportunity to determine the presence of one or more interfering signals.

Abstract translation: 描述了用于检测特定频谱中的一个或多个干扰信号的方法，系统和装置。 可以针对频谱中感兴趣的信号识别信号特性，例如希望在无线通信设备处接收的信号。 至少部分地基于特性，可以识别一个或多个干扰检测机会，在此期间可以检测到频谱中的干扰信号。 干扰检测机会可以包括例如感兴趣的信号可能不存在于特定频谱中的周期。 可以在干扰检测机会期间监视频谱中的传输，以确定一个或多个干扰信号的存在。

公开(公告)号：US20160345326A1

公开(公告)日：2016-11-24

申请号：US15150790

申请日：2016-05-10

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Aleksandar Damnjanovic ,  Peter Gaal ,  Ravi Teja Sukhavasi ,  Xiaoxia Zhang

IPC: H04W72/04 ,  H04L5/00 ,  H04W4/06 ,  H04L1/18

CPC classification number: H04W72/0453 ,  H04L1/1822 ,  H04L5/0055 ,  H04W4/06 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W74/08

Abstract: Techniques and devices are described for wireless communication. A base station may determine a parameter associated with a transmission such as hybrid automatic repeat request (HARQ) feedback, a signal-to-noise ratio, or a determination regarding whether the transmission was successfully decoded. The base station may then determine a contention window adjustment value based on the parameter. The base station may then apply weighting factor (e.g., based on the time of the transmission, a number of devices being served, aspects of the transmission parameter, etc.) to the contention window adjustment value may adjust a contention window size for a second transmission based on the weighted contention window adjustment value (and, in some cases, other weighted adjustments based on other transmissions). The base station may then perform a clear channel assessment (CCA) based on the contention window size.

Abstract translation: 描述了用于无线通信的技术和设备。 基站可以确定与传输相关联的参数，例如混合自动重传请求（HARQ）反馈，信噪比或关于传输是否被成功解码的确定。 然后，基站可以基于该参数来确定竞争窗口调整值。 然后，基站可以应用加权因子（例如，基于传输的时间，被服务的设备的数量，传输参数的方面等）到争用窗口调整值可以将竞争窗口尺寸调整为第二 基于加权争用窗口调整值（以及在某些情况下，基于其他传输的其他加权调整）的传输。 然后，基站可以基于竞争窗口大小来执行清晰的信道评估（CCA）。

公开(公告)号：US20160174214A1

公开(公告)日：2016-06-16

申请号：US14959659

申请日：2015-12-04

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Xiaoxia Zhang ,  Tao Luo ,  Durga Prasad Malladi ,  Yongbin Wei

IPC: H04W72/04 ,  H04J13/00 ,  H04W76/04

CPC classification number: H04W72/0413 ,  H04J13/0048 ,  H04L5/001 ,  H04L5/0026 ,  H04L5/0032 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0091 ,  H04L5/14 ,  H04W28/06 ,  H04W72/1252 ,  H04W76/27

Abstract: A first method for wireless communications may comprise determining sizes of payloads of user equipment (UEs), determining whether to multiplex the payloads of the UEs based on the sizes of the payloads, and allocating codes or cyclic shifts to the UEs to transmit the payloads on a single interlace of resources. A second method for wireless communications may comprise determining a first code or a first cyclic shift used for a first transmission using an interlace of resources, and allocating second codes or second cyclic shifts to UEs for a second transmission, where the second transmission may be multiplexed with the first transmission on the interlace of resources. A third method for wireless communications may comprise allocating a first interlace of resources for a first transmission for occupying an unlicensed radio frequency spectrum band, and allocating a second interlace of resources, occupied by a base station, for a second transmission.

Abstract translation: 用于无线通信的第一种方法可以包括确定用户设备（UE）的有效载荷的大小，基于有效负载的大小来确定是否复用UE的有效载荷，以及向UE分配码或循环移位以将有效负载传输到 一个单一的资源交换。 用于无线通信的第二种方法可以包括使用资源的交错来确定用于第一传输的第一代码或第一循环移位，以及向第二传输的UE分配第二代码或第二循环移位，其中第二传输可以被复用 第一次传输资源交错。 用于无线通信的第三种方法可以包括分配用于第一传输的资源的第一交错，以占用未许可的射频频带，以及为第二传输分配由基站占用的资源的第二交错。

公开(公告)号：US20150373652A1

公开(公告)日：2015-12-24

申请号：US14743312

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Onkar Jayant Dabeer ,  Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Wanshi Chen ,  Kiran Kumar Somasundaram ,  Naga Bhushan

IPC: H04W52/24 ,  H04W52/26

CPC classification number: H04W52/246 ,  H04B7/0874 ,  H04W52/225 ,  H04W52/241 ,  H04W52/243 ,  H04W52/262 ,  H04W74/0808

Abstract: Techniques are described for contention-based wireless communications channel access that may improve the likelihood that a contention procedure will pass and allow a device to transmit an uplink or downlink transmission using the contention-based channel. Various disclosed techniques may determine a transmit power for a subsequent transmission based on channel characteristics during one or more clear channel assessment (CCA) time durations. The transmit power may be selected to provide a CCA threshold that may increase the likelihood that a device will win contention for the channel during the CCA procedure.

Abstract translation: 描述了用于基于争用的无线通信信道接入的技术，其可以提高竞争过程将通过并允许设备使用基于竞争的信道来发送上行链路或下行链路传输的可能性。 各种公开的技术可以在一个或多个清除信道评估（CCA）持续时间期间基于信道特性来确定用于后续传输的发射功率。 可以选择发射功率以提供CCA阈值，其可以增加在CCA过程期间设备将赢得信道争用的可能性。

公开(公告)号：US20150256305A1

公开(公告)日：2015-09-10

申请号：US14618606

申请日：2015-02-10

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Wanshi Chen ,  Tao Luo

IPC: H04L5/00 ,  H04W52/02 ,  H04J11/00 ,  H04W72/04

CPC classification number: H04L5/0032 ,  H04J11/0059 ,  H04L5/0098 ,  H04W52/0216 ,  H04W72/0426 ,  H04W72/0446 ,  H04W76/38 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146

Abstract: Configuration of secondary cell timers is disclosed for long term evolution (LTE)/LTE-Advanced (LTE-A) having unlicensed spectrum. In order to save power at a user equipment (UE), secondary cells may be deactivated by configuring a secondary cell deactivation timer. Because of transmission uncertainties when operating in LTE/LTE-A systems having unlicensed spectrum, the deactivation timers for unlicensed spectrum may be provided in a clear channel assessment (CCA)-dependent configuration, a CCA-independent configuration, or an alternative threshold-driven configuration of both CCA-dependent and CCA-independent configurations.

Abstract translation: 公开了具有未授权频谱的长期演进（LTE）/ LTE-Advanced（LTE-A）的二次单元定时器的配置。 为了在用户设备（UE）节省功率，可以通过配置辅助小区停用定时器来停用辅助小区。 由于在具有非授权频谱的LTE / LTE-A系统中运行时的传输不确定性，可以以明确的信道评估（CCA）依赖配置，CCA独立配置或替代阈值驱动来提供用于非许可频谱的去激活定时器 配置CCA依赖和CCA独立配置。