公开(公告)号：US20170093540A1

公开(公告)日：2017-03-30

申请号：US15247355

申请日：2016-08-25

Applicant: QUALCOMM Incorporated

Inventor： Jing LEI ,  Peter GAAL ,  Hao XU ,  Wanshi CHEN ,  Yongbin WEI ,  Xiaofeng WANG ,  Renqiu WANG ,  Seyed Ali Akbar FAKOORIAN ,  Madhavan Srinivasan VAJAPEYAM ,  Alberto RICO ALVARINO ,  Juan MONTOJO

IPC: H04L5/00 ,  H04L27/26 ,  H04W72/04 ,  H04W56/00

CPC classification number: H04L5/0048 ,  H04J11/0069 ,  H04L5/0044 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/266 ,  H04L27/2663 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2692 ,  H04W56/001 ,  H04W56/0015 ,  H04W72/0446

Abstract: Aspects of the present disclosure provide techniques for design of synchronization signals for narrowband operation, which can be used for stand-alone/in-band/guard-band deployment. An example method is provided for operations which may be performed by a base station (BS). The example method generally includes generating a primary synchronization signal (PSS) utilizing a first code sequence and a cover code applied to the first code sequence over a first number of symbols within one or more subframes, generating a secondary synchronization signal (SSS) based on a second code sequence over a second number of symbols within one or more subframes, and transmitting the PSS and the SSS in the first and second subframes to a first type of a user equipment (UE) that communicates on one or more narrowband regions of wider system bandwidth.

公开(公告)号：US20170078055A1

公开(公告)日：2017-03-16

申请号：US15362468

申请日：2016-11-28

Applicant: QUALCOMM Incorporated

Inventor： Durga Prasad MALLADI ,  Yongbin WEI

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

CPC classification number: H04L5/0032 ,  H04B1/7097 ,  H04J11/0023 ,  H04J11/005 ,  H04J11/0059 ,  H04L5/14 ,  H04W72/0446 ,  H04W72/048 ,  H04W72/082

Abstract: Interference cancellation occurs for devices, where the source of the interference is another UE. The victim UE receiver identifies subframes vulnerable to potential interference from other UEs. Candidate resource blocks in the identified vulnerable subframes are listed. Interference is cancelled for edge resource blocks and valid contiguous resource blocks.

Abstract translation: 干扰消除发生在设备上，其中干扰源是另一个UE。 受害者UE接收机识别易受来自其他UE的潜在干扰的子帧。 列出所识别的弱势子帧中的候选资源块。 边缘资源块和有效连续资源块的干扰被取消。

公开(公告)号：US20160329939A1

公开(公告)日：2016-11-10

申请号：US15213620

申请日：2016-07-19

Applicant: QUALCOMM Incorporated

Inventor： Hao XU ,  Stefan GEIRHOFER ,  Peter GAAL ,  Wanshi CHEN ,  Yongbin WEI

IPC: H04B7/04 ,  H04L5/00

CPC classification number: H04B7/0417 ,  H04B7/0456 ,  H04B7/0639 ,  H04L5/0048

Abstract: Aspects of the present disclosure relate to techniques that may be utilized in networks with base stations and/or mobile devices that use large number of antennas or mutli-dimensional arrays of antennas.

Abstract translation: 本公开的方面涉及可以在具有使用大量天线或多维天线阵列的基站和/或移动设备的网络中使用的技术。

公开(公告)号：US20160323896A1

公开(公告)日：2016-11-03

申请号：US15208560

申请日：2016-07-12

Applicant: QUALCOMM INCORPORATED

Inventor： Kapil BHATTAD ,  Dhananjay A. GORE ,  Durga Prasad MALLADI ,  Yongbin WEI ,  Peter GAAL

IPC: H04W72/08 ,  H04B17/345 ,  H04W72/04 ,  H04L5/14

CPC classification number: H04W72/082 ,  H04B17/345 ,  H04L1/0026 ,  H04L1/1829 ,  H04L5/14 ,  H04W36/0088 ,  H04W36/20 ,  H04W36/30 ,  H04W72/0413 ,  H04W84/042

Abstract: In wireless communication systems, a determination may be made whether to hand off a user equipment (UE) based on whether the UE encounters time varying interference, such as UE to UE interference. The time varying interference may be present only in a specific set of time/frequency resources or subframes. Measurement reporting may be restricted to time/frequency resources which do not experience the time varying interference.

公开(公告)号：US20160173361A1

公开(公告)日：2016-06-16

申请号：US14968563

申请日：2015-12-14

Applicant: QUALCOMM Incorporated

Inventor： Kiran Kumar SOMASUNDARAM ,  Durga Prasad MALLADI ,  Tao LUO ,  Aleksandar DAMNJANOVIC ,  Yongbin WEI ,  Qingsi WANG ,  Srinivas YERRAMALLI

IPC: H04L12/26 ,  H04W24/08

CPC classification number: H04L43/16 ,  H04B17/318 ,  H04L1/0036 ,  H04W16/14 ,  H04W24/08 ,  H04W74/08 ,  H04W84/12 ,  H04W88/06 ,  H04W88/10

Abstract: The disclosure provides for a method of interference detection using adaptive energy detection in unlicensed spectrum. The method can include a first modem operating according to a first radio access technology (RAT) receiving a message from a network entity operating according to the first RAT. The first modem sends a detected energy level value to a second modem that is using a second RAT, where the detected energy level value is based at least on the measured energy level of the received message. The second modem adjusts an energy detection threshold based on the detected energy level value received from the first modem. In an aspect, the first modem receives messages from a plurality of network entities operating according to the first RAT, where the detected energy level value is determined based on measured energy levels of the plurality of received messages.

Abstract translation: 本公开提供了在未许可频谱中使用自适应能量检测的干扰检测方法。 该方法可以包括根据从根据第一RAT操作的网络实体接收消息的第一无线电接入技术（RAT）操作的第一调制解调器。 第一调制解调器将检测到的能级值发送到正在使用第二RAT的第二调制解调器，其中检测到的能量电平值至少基于所测量的接收到的消息的能级。 第二调制解调器基于从第一调制解调器接收到的检测到的能级值调节能量检测阈值。 在一方面，第一调制解调器从根据第一RAT操作的多个网络实体接收消息，其中根据多个接收到的消息的测量能量级确定检测到的能级值。

公开(公告)号：US20160099794A1

公开(公告)日：2016-04-07

申请号：US14866318

申请日：2015-09-25

Applicant: QUALCOMM Incorporated

Inventor： Arumugam CHENDAMARAI KANNAN ,  Tao LUO ,  Yongbin WEI ,  Durga Prasad MALLADI

IPC: H04L1/00 ,  H04W74/08 ,  H04B17/345 ,  H04W16/14 ,  H04W72/04

Abstract: In an unlicensed band, different types of interference may be experienced by user equipments (UEs), and a serving evolved Node B (eNB) may not be aware of the interference types affecting a UE. Therefore, aspects presented herein provide UE assisted interference learning, in which the UE detects an interfering signal and reports information such as the interference level and properties of the interfering signal to a serving eNB. Another aspects presented herein provide for an eNB which receives, from one or more UEs, information indicating properties of each of at least one interfering signals experienced by the UEs, such as interference types affecting the UEs. The eNB further uses the information received from the UE, including the wireless technology type to determine the properties of its downlink transmission and the length of the contention window leading up to its downlink transmission.

Abstract translation: 在非许可频带中，用户设备（UE）可能会遇到不同类型的干扰，并且服务演进节点B（eNB）可能不知道影响UE的干扰类型。 因此，本文提出的方面提供UE辅助干扰学习，其中UE检测干扰信号，并向服务eNB报告诸如干扰信号的干扰等级和属性的信息。 本文提供的另一方面提供了一种eNB，其从一个或多个UE接收指示由UE经历的至少一个干扰信号中的每一个的属性的信息，例如影响UE的干扰类型。 eNB进一步使用从UE接收到的信息，包括无线技术类型来确定其下行链路传输的属性以及导致其下行链路传输的竞争窗口的长度。

公开(公告)号：US20150282191A1

公开(公告)日：2015-10-01

申请号：US14639058

申请日：2015-03-04

Applicant: QUALCOMM Incorporated

Inventor： Tao LUO ,  Michael Lee MCCLOUD ,  Brian Clarke BANISTER ,  Peter GAAL ,  Aleksandar DAMNJANOVIC ,  Yongbin WEI ,  Hao XU ,  Tingfang JI ,  Siddhartha MALLIK ,  Alexei Yurievitch GOROKHOV ,  Arumugam CHENDAMARAI KANNAN

IPC: H04W72/08 ,  H04L5/00

CPC classification number: H04W72/082 ,  H04B1/7107 ,  H04B7/0632 ,  H04B7/068 ,  H04B7/0684 ,  H04J11/005 ,  H04L1/0026 ,  H04L5/0048 ,  H04W24/10

Abstract: Reported CSI may not reflect non-cancelable CRS interference received from an interfering cell, such as when the CSI is computed when CRS interference is not received. To address the issue, a user equipment (UE) may determine an interference cancelation/suppression efficiency (CSE) associated with canceling/suppressing interference from interfering cells. In addition, based on the determined CSE, a UE may compute CSI such that the CSI reflects the true cancelation efficiency of the UE with respect to interfering cell signals. When computing the CSI based on the determined CSE, the UE may report that the CSI is worse than it is to reflect the UE's true cancelation efficiency with respect to the interfering cell signals.

Abstract translation: 报告的CSI可能不反映从干扰小区接收的不可取消的CRS干扰，例如当没有接收到CRS干扰时计算CSI。 为了解决该问题，用户设备（UE）可以确定与抵消/抑制来自干扰小区的干扰相关联的干扰消除/抑制效率（CSE）。 另外，基于所确定的CSE，UE可以计算CSI，使得CSI相对于干扰小区信号反映UE的真实消除效率。 当基于确定的CSE计算CSI时，UE可以报告CSI比反映UE相对于干扰小区信号的真实消除效率更差。

公开(公告)号：US20140341050A1

公开(公告)日：2014-11-20

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

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：US20140204919A1

公开(公告)日：2014-07-24

申请号：US14162664

申请日：2014-01-23

Applicant: QUALCOMM Incorporated

Inventor： Wanshi CHEN ,  Hao XU ,  Peter GAAL ,  Yongbin WEI

IPC: H04L5/00 ,  H04W52/22

CPC classification number: H04L5/0028 ,  H04B7/2681 ,  H04W52/221 ,  H04W52/54 ,  H04W56/0005 ,  H04W56/004 ,  H04W56/0045

Abstract: A method of wireless communication includes receiving a signal from an base station. The method also includes determining a timing advance loop from a set of timing advance loops, and/or a power control loop from a set of power control loops. The determination is based on the received signal.

Abstract translation: 一种无线通信方法包括从基站接收信号。 该方法还包括从一组定时提前循环确定定时提前循环，和/或从一组功率控制回路确定功率控制回路。 该确定基于接收到的信号。

公开(公告)号：US20140098773A1

公开(公告)日：2014-04-10

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

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.

Abstract translation: 为了从UE接收到的信号中消除由于第二信号（例如，来自非服务小区）的任何干扰而不接收附加控制信息，UE盲目地估计与解码第二信号相关联的参数。 这可以包括基于与信号相关联的符号集来确定度量，以便确定第二信号的参数，例如第二信号的传输模式，调制格式和/或空间方案。 可以基于度量与阈值的比较来确定信号的参数。 当空间方案和调制格式未知时，盲估计可以包括确定与潜在的空间方案和调制格式组合相关联的可能传输的调制符号的多个星座。 干扰消除可以使用星座和相应的概率权重进行。