公开(公告)号：US09736829B2

公开(公告)日：2017-08-15

申请号：US14494929

申请日：2014-09-24

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L5/00 ,  H04W52/02 ,  H04L29/06 ,  H04W16/14 ,  H04W76/02 ,  H04W74/02

CPC classification number: H04W72/042 ,  H04L5/001 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0055 ,  H04L5/0091 ,  H04L65/601 ,  H04L69/14 ,  H04W16/14 ,  H04W52/0209 ,  H04W74/02 ,  H04W76/15 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/26

Abstract: Methods, apparatuses, systems, and devices are described for wireless communication. In one method, at least a first carrier may be monitored for an indication of a clear channel assessment (CCA) for a second carrier in a shared spectrum, and communication may take place using the second carrier based on the indication. In another method, a CCA may be performed for a second carrier second carrier of a shared spectrum, and an indication of the CCA for the second carrier may be transmitted on a first carrier.

公开(公告)号：US09723497B2

公开(公告)日：2017-08-01

申请号：US14244739

申请日：2014-04-03

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Tao Luo ,  Wanshi Chen ,  Peter Gaal ,  Taesang Yoo ,  Yongbin Wei ,  Durga Prasad Malladi ,  Tingfang Ji

IPC: H04L5/00 ,  H04W24/02 ,  H04J11/00 ,  H04W72/08 ,  H04B1/7103

CPC classification number: H04W24/02 ,  H04B1/7103 ,  H04J11/005 ,  H04L5/0053 ,  H04W72/082

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for network assisted interference cancellation (IC) and interference suppression (IS) for multiple services. According to aspects a user equipment (UE) may determine information regarding system parameters for one or more types of communications services used to transmit potentially interfering signals in one or more neighbor cells, wherein a type of the information determined depends on the type of communications service. The UE may perform interference management using the determined information to cancel or suppress interference caused by the potentially interfering signals.

公开(公告)号：US09723496B2

公开(公告)日：2017-08-01

申请号：US14105086

申请日：2013-12-12

Applicant: QUALCOMM Incorporated

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

IPC: H04W24/02 ,  H04L5/00 ,  H04B7/06 ,  H04B7/08 ,  H04J11/00

CPC classification number: H04W24/02 ,  H04B7/0678 ,  H04B7/068 ,  H04B7/0842 ,  H04J11/005 ,  H04L5/0058

Abstract: In order to cancel any interference due to the second signal (e.g., from a non-serving cell) from a signal received at a UE, without receiving additional control information, the UE blindly estimates parameters associated with decoding the second signal. This may include determining a metric based on sets of symbols associated with the signals in order to determine parameters for the second signal, e.g., the transmission mode, modulation format, and/or spatial scheme of the second signal. The parameters for the signal may be determined based on a comparison of the metric with a threshold. When a spatial scheme and a modulation format is unknown, the blind estimation may include determining a plurality of constellations of possible transmitted modulated symbols associated with a potential spatial scheme and modulation format combination. Interference cancellation can be performed using the constellations and a corresponding probability weight.

公开(公告)号：US20170188323A1

公开(公告)日：2017-06-29

申请号：US15460538

申请日：2017-03-16

Applicant: QUALCOMM Incorporated

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

IPC: H04W56/00 ,  H04W16/14 ,  H04L27/26 ,  H04W74/08

CPC classification number: H04W16/14 ,  H04J11/00 ,  H04L1/00 ,  H04L5/001 ,  H04L5/0044 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/14 ,  H04L5/1469 ,  H04L27/0006 ,  H04L27/2602 ,  H04W24/02 ,  H04W28/0252 ,  H04W28/0289 ,  H04W28/08 ,  H04W28/16 ,  H04W48/10 ,  H04W56/001 ,  H04W56/002 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/082 ,  H04W74/006 ,  H04W74/04 ,  H04W74/0808 ,  H04W74/0816 ,  H04W74/0833 ,  H04W84/12 ,  H04W88/02 ,  H04W88/06 ,  H04W88/08

Abstract: Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes synchronizing clear channel assessment (CCA) slots across a plurality of base stations to determine availability of an unlicensed spectrum for transmissions in a next transmission interval. A second method includes performing a CCA during one of a plurality of CCA slots synchronized across a plurality of evolved Node Bs (eNBs) to determine availability of unlicensed spectrum for transmissions in a next transmission interval.

公开(公告)号：US09692539B2

公开(公告)日：2017-06-27

申请号：US13659633

申请日：2012-10-24

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Taesang Yoo ,  Yongbin Wei

IPC: H04L1/00 ,  H04J11/00 ,  H04B1/7103

CPC classification number: H04J11/0023 ,  H04B1/7103 ,  H04B2201/7071

Abstract: Incremental interference cancelation (IC) capability management and signaling is disclosed. A mobile device selects certain groups of its individual IC capabilities to deactivate in response to various operating conditions it is experiencing. The mobile device reports its currently active IC capability to a serving base station, which uses information to determine whether to modify any existing communication conditions with respect to the reporting mobile device. The base station detects and analyzes the current communication conditions with respect to the reporting mobile device in light of the mobile device's currently active IC capabilities. The base station may modify such conditions through actions such as signaling the mobile device to activate or deactivate certain other groups of IC capabilities. The base station can make other modifications such as changing the communication schedule for the mobile device, modifying the control loop for channel quality indicator (CQI) reporting, and the like.

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：US09608777B2

公开(公告)日：2017-03-28

申请号：US14573562

申请日：2014-12-17

Applicant: QUALCOMM Incorporated

Inventor： Durga Prasad Malladi ,  Yongbin Wei

IPC: H04L5/00 ,  H04J11/00 ,  H04W72/04 ,  H04L5/14 ,  H04W74/08 ,  H04L1/18 ,  H04L27/26

CPC classification number: H04W72/0446 ,  H04J11/00 ,  H04J2011/0009 ,  H04J2011/0013 ,  H04L1/18 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0055 ,  H04L5/0076 ,  H04L5/14 ,  H04L27/2602 ,  H04L27/2605 ,  H04L43/0864 ,  H04W16/32 ,  H04W72/0453 ,  H04W74/08

Abstract: Methods, systems, and devices are described for hierarchical communications 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.

公开(公告)号：US09591429B2

公开(公告)日：2017-03-07

申请号：US13844176

申请日：2013-03-15

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Wanshi Chen ,  Yongbin Wei ,  Peter Gaal ,  Tingfang Ji

IPC: H04W4/00 ,  H04W48/12 ,  H04W28/06

CPC classification number: H04W72/042 ,  H04B7/0413 ,  H04W4/70 ,  H04W16/28 ,  H04W28/06 ,  H04W48/12 ,  H04W84/042

Abstract: The described aspects include methods and apparatus providing MTC in a wireless network. In an aspect, a narrow bandwidth within a wide system bandwidth is allocated for communicating data related to MTC. MTC control data generated for communicating over one or more MTC control channels for an MTC UE within the narrow bandwidth is transmitted over the one or more MTC control channels. The one or more MTC channels are multiplexed with one or more legacy channels over the wide system bandwidth. Other aspects are provided for transmission mode and content of the MTC control data or other MTC data.

Abstract translation: 所描述的方面包括在无线网络中提供MTC的方法和装置。 在一个方面，在宽系统带宽内的窄带宽被分配用于传送与MTC有关的数据。 通过一个或多个MTC控制信道发送用于通过用于在窄带宽内的MTC UE的一个或多个MTC控制信道进行通信的MTC控制数据。 一个或多个MTC信道在宽系统带宽上与一个或多个传统信道复用。 为MTC控制数据或其他MTC数据的传输模式和内容提供其他方面。

公开(公告)号：US09565593B2

公开(公告)日：2017-02-07

申请号：US14281636

申请日：2014-05-19

Applicant: QUALCOMM Incorporated

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

IPC: H04W28/08 ,  H04W28/02 ,  H04W74/08 ,  H04W24/02 ,  H04W28/16 ,  H04W72/04 ,  H04W56/00 ,  H04W74/04 ,  H04W16/14 ,  H04W76/02 ,  H04L1/00 ,  H04L27/26 ,  H04L27/00 ,  H04W48/10 ,  H04W72/08 ,  H04W74/00 ,  H04L5/14 ,  H04L5/00 ,  H04W84/12 ,  H04W88/06 ,  H04W88/08

CPC classification number: H04W16/14 ,  H04J11/00 ,  H04L1/00 ,  H04L5/001 ,  H04L5/0044 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/14 ,  H04L5/1469 ,  H04L27/0006 ,  H04L27/2602 ,  H04W24/02 ,  H04W28/0252 ,  H04W28/0289 ,  H04W28/08 ,  H04W28/16 ,  H04W48/10 ,  H04W56/001 ,  H04W56/002 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/082 ,  H04W74/006 ,  H04W74/04 ,  H04W74/0808 ,  H04W74/0816 ,  H04W74/0833 ,  H04W84/12 ,  H04W88/02 ,  H04W88/06 ,  H04W88/08

Abstract: Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes comparing past transmission activity on an unlicensed spectrum to an activity threshold, transmitting a first subframe type in the unlicensed spectrum during a next active transmission when the past transmission activity is greater than the activity threshold, and transmitting a second subframe type in the unlicensed spectrum during a next active transmission when the past transmission activity is lesser than the activity threshold, the second subframe type comprising a more robust subframe type than the first subframe type. A second method includes generating one or both of PUCCH signals and PUSCH signals based on interleaved signals that increase nominal bandwidth occupancy in an unlicensed spectrum, and transmitting the generated signals in the unlicensed spectrum. A third method includes receiving the PUCCH signals and the PUSCH signals.

Abstract translation: 对长期演进（LTE）通信中使用非许可频谱的方法和装置进行描述。 第一种方法包括将未许可频谱上的过去传输活动与活动阈值进行比较，当过去传输活动大于活动阈值时，在下一活动传输期间，在非许可频谱中发送第一子帧类型，并将 在过去传输活动小于活动阈值的下一活动传输期间的未许可频谱，第二子帧类型包括比第一子帧类型更强壮的子帧类型。 第二种方法包括基于增加非许可频谱中的标称带宽占用的交织信号产生PUCCH信号和PUSCH信号中的一个或两者，以及在未许可频谱中发送所生成的信号。 第三种方法包括接收PUCCH信号和PUSCH信号。

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。