公开(公告)号：US09686761B2

公开(公告)日：2017-06-20

申请号：US14181970

申请日：2014-02-17

Applicant: QUALCOMM Incorporated

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

IPC: H04L7/00 ,  H04W56/00 ,  H04J11/00 ,  H04W72/04 ,  H04W24/02

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.

公开(公告)号：US20170127382A1

公开(公告)日：2017-05-04

申请号：US15270965

申请日：2016-09-20

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Taesang Yoo ,  Jing Sun

IPC: H04W72/00 ,  H04L12/18

CPC classification number: H04W72/005 ,  H04L12/1886 ,  H04W72/082 ,  H04W74/0808

Abstract: Methods, systems, and devices for wireless communication are described. A base station supporting multimedia broadcast multicast service (MBMS) and operating in a shared radio frequency spectrum band may map MBMS transport blocks (TBs) to each carrier in the system bandwidth. The device may perform a clear channel assessment (CCA) on one or more of the carriers, and transmit a portion of the MBMS TBs on carriers with successful CCAs. The portion of the MBMS TBs mapped to carriers with unsuccessful CCAs may be punctured. In various examples, a single TB may be mapped across the carriers, different TBs may mapped to each carrier, or redundancy versions (RVs) may be mapped to each carrier. A region at the frequency boundary of each carrier may be reserved for a guard region, and may not be used for MBMS transmissions when a carrier is associated with a failed CCA.

公开(公告)号：US09628214B2

公开(公告)日：2017-04-18

申请号：US13664158

申请日：2012-10-30

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Taesang Yoo ,  Lu Zhao ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04J11/00

CPC classification number: H04J11/005 ,  H04J2211/001

Abstract: The following is directed to control and data channel interference cancellation between a serving cell and interfering cell. A first symbol of a subframe is processed to determine a control span of a serving cell and a control span of an interfering cell. The interference is then cancelled based on the determined control spans.

公开(公告)号：US20170086222A1

公开(公告)日：2017-03-23

申请号：US15211162

申请日：2016-07-15

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo

IPC: H04W74/00 ,  H04L27/20 ,  H04W74/08 ,  H04L12/26 ,  H04W24/08

CPC classification number: H04L27/2067 ,  H04L5/001 ,  H04L5/0048 ,  H04L27/0006 ,  H04L43/0811 ,  H04W24/08 ,  H04W72/00 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. In some wireless communications systems, a wireless device may identify a set of at least two wireless communications channels that are available for communication with another wireless device. In some examples, the wireless device may identify at least one channel of the set, and may select integrity check information that indicates the identified wireless channel(s) that are available. The wireless device may then transmit the integrity check information during a first time period. In some examples, a wireless device may receive wireless communication that includes integrity check information on a subset of channels. The wireless device may then determine, based on the integrity check information, whether the identified subset of channels is the same as the actual subset of channels used for transmission of the wireless communications.

公开(公告)号：US09591492B2

公开(公告)日：2017-03-07

申请号：US13671404

申请日：2012-11-07

Applicant: QUALCOMM Incorporated

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

IPC: H04W88/02 ,  H04W88/08 ,  H04L1/00 ,  H04W24/00 ,  H04W72/12 ,  H04W72/08

CPC classification number: H04W24/00 ,  H04L1/0026 ,  H04L1/0027 ,  H04W72/082 ,  H04W72/1247 ,  H04W88/02 ,  H04W88/08

Abstract: Collision handling of channel state information (CSI) reports is described for enhanced inter-cell interference coordination (eICIC), coordinated multipoint transmission (CoMP), and/or carrier aggregation (CA). Various aspects include prioritization schemes to resolve collisions between different CSI reporting sets in relation to the same component carrier (CC) used with transmission. Multiple stages of prioritization may identify CSI for a report based on various criteria. Tie breaker criteria may be defined for priority among CSI reports that changes for different subframes. In other aspects, PUSCH is utilized to transmit CSI for prioritized reporting sets in a subframe. In yet other aspects, if parallel PUCCH is supported, colliding CSI may be handled on a per PUCCH basis. Other aspects may allow for prioritizing periodic CSI within each of multiple CCs, and then prioritizing over different CCs to handle an interaction of CSI reports for CA, eICIC and/or CoMP.

Abstract translation: 描述了用于增强小区间干扰协调（eICIC），协同多点传输（CoMP）和/或载波聚合（CA）的信道状态信息（CSI）报告的冲突处理。 各方面包括优先化方案，以解决与传输使用的相同分量载波（CC）相关的不同CSI报告集之间的冲突。 基于各种标准的多个阶段的优先级可以识别报告的CSI。 可以针对CSI报告中针对不同子帧的更改的优先级定义断线器标准。 在其它方面，利用PUSCH在子帧中传送用于优先化报告集的CSI。 在其他方面，如果支持并行PUCCH，则可以在每个PUCCH的基础上处理冲突CSI。 其他方面可以允许在多个CC的每一个内对周期性CSI进行优先级排序，然后对不同的CC进行优先级排序以处理CA，eICIC和/或CoMP的CSI报告的交互。

公开(公告)号：US09553706B2

公开(公告)日：2017-01-24

申请号：US14275803

申请日：2014-05-12

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Michael Mao Wang ,  Wanshi Chen ,  Peter Gaal ,  Yongbin Wei ,  Aleksandar Damnjanovic ,  Hao Xu ,  Taesang Yoo

IPC: H04L5/00 ,  H04W24/02 ,  H04L25/02

CPC classification number: H04L5/0053 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0058 ,  H04L25/0202 ,  H04L25/0224 ,  H04L25/0236 ,  H04W24/02

Abstract: Reference signals may not uniformly span over time and/or frequency on a resource unit. For example, reference signals may non-uniformly occupy symbols of a subframe. Alternatively, reference signals normally transmitted over certain tones of a subframe may have to be punctured to avoid collisions with a PSS and/or SSS transmitted over the same tones. Consequently, a UE may only be able to use a subset of reference signal tones for performing channel estimation. Accordingly, a method, an apparatus, and a computer program product for wireless communication are provided for improving channel estimation under a non-uniform signal pattern. The apparatus indicates to a UE to utilize a subset of reference signals to derive a channel estimate for demodulating data in a specific subframe, and transmits a plurality of subframes, the plurality of subframes including the reference signals and the specific subframe, the specific subframe including a PSS and/or SSS.

Abstract translation: 参考信号可能不会在资源单元上的时间和/或频率上均匀地跨越。 例如，参考信号可能不均匀地占据子帧的符号。 或者，通常在子帧的某些音调上发送的参考信号可能必须被打孔以避免与通过相同音调发送的PSS和/或SSS的冲突。 因此，UE可能仅能够使用用于执行信道估计的参考信号音调的子集。 因此，提供了一种用于无线通信的方法，装置和计算机程序产品，用于在非均匀信号模式下改进信道估计。 该设备向UE指示使用参考信号的子集来导出用于在特定子帧中解调数据的信道估计，并且发送包括参考信号和特定子帧的多个子帧，所述特定子帧包括 PSS和/或SSS。

公开(公告)号：US20160380724A1

公开(公告)日：2016-12-29

申请号：US15173206

申请日：2016-06-03

Applicant: QUALCOMM Incorporated

Inventor： Durga Prasad Malladi ,  Yongbin Wei ,  Taesang Yoo ,  Siddhartha Mallik ,  Jing Sun

IPC: H04L1/00 ,  H04W84/04 ,  H03M13/45 ,  H04B17/336

CPC classification number: H04L1/0045 ,  H03M13/45 ,  H04B17/336 ,  H04L1/1812 ,  H04L1/1835 ,  H04L1/1845 ,  H04W84/042

Abstract: Methods, systems, and devices for soft hybrid automatic repeat request operation in wireless communication are described. A user equipment (UE) may fail to decode a received signal, for example. The UE may store a portion of the signal in a buffer if the signal size is greater than the buffer size; otherwise, the UE may store the entire signal in the buffer. The UE may then receive a second signal and combine the second signal with the stored portion of the first signal; the combined signal may be larger than the buffer size. This combined signal may, for example, have a code rate less than the first signal. The UE may perform a second decoding attempt on the combined signal. The UE may determine that the second decoding attempt failed and may store a portion of the combined signal in the buffer.

Abstract translation: 描述了用于无线通信中的软混合自动重传请求操作的方法，系统和设备。 例如，用户设备（UE）可能无法解码所接收的信号。 如果信号大小大于缓冲器大小，则UE可以将该信号的一部分存储在缓冲器中; 否则，UE可以将整个信号存储在缓冲器中。 然后，UE可以接收第二信号并将第二信号与存储的第一信号的部分组合; 组合信号可能大于缓冲器大小。 该组合信号可以例如具有小于第一信号的码率。 UE可以对组合信号执行第二解码尝试。 UE可以确定第二解码尝试失败并且可以将组合信号的一部分存储在缓冲器中。

公开(公告)号：US20160255594A1

公开(公告)日：2016-09-01

申请号：US15045603

申请日：2016-02-17

Applicant: QUALCOMM Incorporated

Inventor： Madhavan Srinivasan Vajapeyam ,  Jelena Damnjanovic ,  Peter Gaal ,  Wanshi Chen ,  Taesang Yoo

IPC: H04W52/34 ,  H04W52/36

CPC classification number: H04W52/346 ,  H04W52/146 ,  H04W52/365

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may coordinate power utilization across component carriers (CCs) with different transmission time interval (TTI) configurations. For example, the UE may reserve a portion of the transmit power for a CC with a reduced TTI length (e.g., an enhanced CC (eCC)). In other examples, the UE may dynamically allocate power between CCs with overlapping uplink periods. That is, the UE may borrow power allocated to one CC to transmit on an eCC. The UE may use a prioritization scheme to determine the transmit power for each CC. In some cases, the UE may send a power headroom report based on the power level of the eCC. The power headroom may be a virtual power headroom based on predicted eCC transmission power, or an actual power headroom based on uplink scheduling.

Abstract translation: 描述了用于无线通信的方法，系统和设备。 用户设备（UE）可以以不同的传输时间间隔（TTI）配置协调跨分量载波（CC）的功率利用。 例如，UE可以为具有减小的TTI长度的CC（例如，增强型CC（eCC））保留用于CC的发射功率的一部分。 在其他示例中，UE可以在具有重叠的上行链路周期的CC之间动态地分配功率。 也就是说，UE可以借用分配给一个CC的功率在eCC上进行发送。 UE可以使用优先化方案来确定每个CC的发射功率。 在某些情况下，UE可以基于eCC的功率电平发送功率余量报告。 功率余量可以是基于预测的eCC发送功率或基于上行链路调度的实际功率余量的虚拟功率余量。

公开(公告)号：US20160192395A1

公开(公告)日：2016-06-30

申请号：US14972344

申请日：2015-12-17

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Tao Luo ,  Arumugam Chendamarai Kannan ,  Siddhartha Mallik

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

CPC classification number: H04W74/0808 ,  H04B7/0691 ,  H04B7/0695 ,  H04B7/0874 ,  H04B7/088 ,  H04L5/0048 ,  H04W16/14 ,  H04W72/044 ,  H04W74/08

Abstract: Techniques are provided for accessing a shared radio frequency spectrum band by selecting a subset antennas associated with a successful access procedure for accessing the shared radio frequency spectrum. In some examples, a wireless communication device, such as a network node, may perform a listen before talk (LBT) procedure for each of two or more subsets of antennas associated with the network node, and only those subsets of antennas that pass the LBT procedure are used for transmissions during the associated time period, while other antennas are idle, or used for transmissions on another radio frequency spectrum band during the associated time period. In some examples, antennas of a wireless communication device may perform an access procedure utilizing beamforming capabilities of associated antennas to determine one or more different spatial directions that may provide access to the shared radio frequency spectrum band.

Abstract translation: 提供技术用于通过选择与访问共享射频频谱的成功访问过程相关联的子集天线来访问共享射频频带。 在一些示例中，诸如网络节点的无线通信设备可以针对与网络节点相关联的两个或更多个天线子集中的每一个执行听即演（LBT）过程，并且仅执行通过LBT的那些天线子集 过程用于在相关时间段期间的传输，而其它天线是空闲的，或者用于在相关联的时间段期间的另一个射频频带上的传输。 在一些示例中，无线通信设备的天线可以使用相关天线的波束成形能力来执行访问过程，以确定可提供对共享射频频带的访问的一个或多个不同的空间方向。

公开(公告)号：US09288815B2

公开(公告)日：2016-03-15

申请号：US14282992

申请日：2014-05-20

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Taesang Yoo

IPC: H04W72/00 ,  H04W72/08 ,  H04B7/02 ,  H04B7/06 ,  H04L1/00 ,  H04W52/28 ,  H04W52/40 ,  H04B17/24

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 cancellation, 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.