公开(公告)号：PH12017500105A1

公开(公告)日：2017-05-22

申请号：PH12017500105

申请日：2017-01-17

Applicant: QUALCOMM INC

Inventor： WEI YONGBIN ,  MALLADI DURGA PRASAD ,  LUO TAO ,  YERRAMALLI SRINIVAS ,  DAMNJANOVIC ALEKSANDAR ,  XU HAO ,  GAAL PETER ,  CHEN WANSHI

IPC: H04W72/04 ,  H04W16/14 ,  H04W72/12

Abstract: Techniques for wireless communications over a shared radio frequency spectrum band, may include techniques for transmitting uplink data transmissions using allocated uplink resources. Allocated uplink resources may include an uplink channel comprising a number of allocated interlaces of resource blocks (RBs) for use by a user equipment (UE). An incoming data stream may be processed and data separated into each of the allocated interlaces of RBs for the UE. Such separation may be through demultiplexing the data stream to obtain data for the allocated interlaces of RBs. The demultiplexed data may be mapped onto associated resource elements associated with the allocated interlaces of RBs, and transmitted. Different types of uplink channels, such as a physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH) and/or a physical random access channel (PRACH) may be allocated to interlaces of RBs in one or more subframes of a transmitted radio frame.

公开(公告)号：CA2989004A1

公开(公告)日：2017-01-26

申请号：CA2989004

申请日：2016-07-01

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  ZHANG XIAOXIA ,  LUO TAO

IPC: H04W74/08 ,  H04L5/00

Abstract: Uplink control information may not be transmitted if a CCA of the unlicensed SCC fails. Thus, the present disclosure provide a solution in which uplink control information for an unlicensed SCC may still be transmitted when a CCA of the unlicensed SCC fails. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus generates uplink control information. The apparatus also attempts to perform a CCA of a carrier for an uplink burst. In addition, the apparatus determines a failure of the CCA. In addition, the apparatus performs one of the following when it is determined that the CCA has failed: transmitting the PUCCH transmission on the carrier in a later subframe of the uplink burst, transmitting the PUCCH transmission on the carrier in a different uplink burst, or transmitting the PUCCH transmission on a different carrier.

公开(公告)号：AU2015290198A1

公开(公告)日：2017-01-05

申请号：AU2015290198

申请日：2015-06-22

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  LUO TAO ,  SUKHAVASI RAVI TEJA ,  JOHN WILSON MAKESH PRAVIN ,  SOMASUNDARAM KIRAN KUMAR ,  DABEER ONKAR ,  MALLADI DURGA PRASAD ,  BHUSHAN NAGA ,  WEI YONGBIN ,  GAAL PETER ,  CHEN WANSHI ,  XU HAO ,  DAMNJANOVIC ALEKSANDAR

IPC: H04W74/08

Abstract: The present disclosure, for example, relates to one or more techniques for scaling the bandwidth of a carrier. Available sub-channels of an unlicensed radio frequency spectrum band may be determined, and the available sub-channels may be included in the carrier. The available sub-channels may be adjacent or non-adjacent sub-channels. The bandwidth of the carrier may be determined according to which sub-channels are included in the carrier. In this way, the bandwidth of the carrier may be scaled according to the available sub-channels in the unlicensed radio frequency spectrum band.

公开(公告)号：CA2985375A1

公开(公告)日：2016-12-29

申请号：CA2985375

申请日：2016-05-19

Applicant: QUALCOMM INC

Inventor： ZHANG XIAOXIA ,  MALLIK SIDDHARTHA ,  YERRAMALLI SRINIVAS ,  YOO TAESANG ,  LUO TAO

IPC: H04L5/00 ,  H04L27/00

Abstract: Measurement and demodulation may be impacted by varying transmit power due to varying numbers of carriers in a shared radio frequency (RF) spectrum band. Methods, systems, and devices are described for wireless communication. One method includes monitoring at least one carrier of a RF spectrum band for a first reference signal transmitted in a number of listen-before-talk (LBT) radio frames from a plurality of LBT radio frames associated with the plurality of carriers, where the plurality of LBT radio frames are received at the user equipment (UE) in different sets of at least one carrier of the RF spectrum band at different times, and where the first reference signal is associated with a first fixed transmit power; receiving a plurality of instances of the first reference signal; measuring the plurality of instances; and determining a cell measurement based at least in part on the measurements of the plurality of instances.

公开(公告)号：CA2975408A1

公开(公告)日：2016-09-22

申请号：CA2975408

申请日：2016-03-10

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  LUO TAO ,  CHEN WANSHI

IPC: H04W72/04 ,  H04W48/18

Abstract: Channel availability is uncertain when employing an unlicensed carrier. In particular, it may be difficult to schedule grants in advance because of the uncertainty associated with future channels availability. Accordingly, scheduling UL and/or DL grants exclusively using self-scheduling or exclusively using cross-carrier scheduling for utilizing an unlicensed carrier may result in wasted communication opportunities. Aspects disclosed herein whereby an eNB may use licensed and unlicensed carriers to communicate downlink grants and uplink grants for an unlicensed carrier to a UE. In one aspect, the eNB may use an unlicensed carrier to communicate downlink grants for downlink communication on the unlicensed carrier, and may use a licensed carrier to communicate uplink grants for uplink communication on the unlicensed carrier. In particular, while Uplink grants on the unlicensed secondary carrier are transmitted by means of appropriate DCIs on the Primary Carrier Component, in what it corresponds to a cross-carrier scheduling, downlink scheduling grants are transmitted in the PDCCH being transmitted in the SCC itself.

公开(公告)号：CA2950844A1

公开(公告)日：2015-12-10

申请号：CA2950844

申请日：2015-06-03

Applicant: QUALCOMM INC

Inventor： LUO TAO ,  GAAL PETER ,  CHEN WANSHI ,  DAMNJANOVIC ALEKSANDAR ,  WEI YONGBIN ,  MALLADI DURGA PRASAD ,  XU HAO ,  VAJAPEYAM MADHAVAN SRINIVASAN ,  YERRAMALLI SRINIVAS

IPC: H04W74/08 ,  H04B17/318 ,  H04W56/00 ,  H04W80/02

Abstract: Protection of transmission and reception of clear channel assessment (CCA)- exempt transmission (CET) is disclosed in which channel reserving signals or protection signals may be transmitted by the transmitter or receiver of the CET. The transmitted signals may be received by the neighboring access points that could potentially cause interference with the reception of the CET.

公开(公告)号：WO2015134161A8

公开(公告)日：2016-10-06

申请号：PCT/US2015015359

申请日：2015-02-11

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  CHEN WANSHI ,  LUO TAO

IPC: H04L5/00 ,  H04W76/06

CPC classification number: H04L5/0032 ,  H04J11/0059 ,  H04L5/0098 ,  H04W52/0216 ,  H04W72/0426 ,  H04W72/0446 ,  H04W76/068 ,  Y02D70/00 ,  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: 公开了具有未许可频谱的长期演进（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。

公开(公告)号：WO2015031743A8

公开(公告)日：2016-02-25

申请号：PCT/US2014053390

申请日：2014-08-29

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  LUO TAO ,  MALLADI DURGA PRASAD ,  BHUSHAN NAGA ,  WEI YONGBIN ,  JI TINGFANG ,  DAMNJANOVIC ALEKSANDAR ,  CHEN WANSHI

IPC: H04L1/00 ,  H04L1/18 ,  H04L5/00 ,  H04L27/34

CPC classification number: H04L1/0006 ,  H04L1/0034 ,  H04L1/0071 ,  H04L1/08 ,  H04L1/1893 ,  H04L5/001 ,  H04L5/0044 ,  H04L5/0073 ,  H04L5/1469 ,  H04L27/3488

Abstract: Resource mapping and coding schemes to handle bursty interference are disclosed that provide for spreading the modulated symbols for one or more transmission code words over more symbols in the time-frequency transmission stream. Certain aspects allow for the modulated symbols to be based on bits from more than one code word. Other aspects also provide for re-mapping code word transmission sequences for re-transmissions based on the number of re-transmissions requested by the receiver. Additional aspects provide for layered coding that uses a lower fixed-size constellation to encode/decode transmissions in a layered manner in order to achieve a larger- size constellation encoding. The layered encoding process allows the transmitter and receiver to use different coding rates for each coding layer. The layered encoding process also allows interference from neighboring cells to be canceled without knowledge of the actual constellation used to code the interfering neighboring signal.

Abstract translation: 公开了用于处理突发干扰的资源映射和编码方案，其用于在时间 - 频率传输流中通过更多符号将一个或多个传输码字的调制符号扩展。 某些方面允许调制符号基于来自多于一个码字的比特。 其他方面还提供了基于由接收机请求的重传次数来重新映射用于重传的码字传输序列。 另外的方面提供了使用较低固定尺寸星座以分层方式对传输进行编码/解码以便实现更大尺寸星座编码的分层编码。 分层编码过程允许发射机和接收机对每个编码层使用不同的编码速率。 分层编码处理还允许在不知道用于对干扰相邻信号进行编码的实际星座的情况下取消来自相邻小区的干扰。

公开(公告)号：WO2015027161A2

公开(公告)日：2015-02-26

申请号：PCT/US2014052305

申请日：2014-08-22

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  LUO TAO ,  BHUSHAN NAGA ,  GAAL PETER

IPC: H04W24/08

CPC classification number: H04W24/08 ,  H04B17/00 ,  H04B17/345 ,  H04W16/14 ,  H04W72/1215 ,  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：ES2912614T3

公开(公告)日：2022-05-26

申请号：ES17729631

申请日：2017-05-26

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  GAAL PETER ,  MONTOJO JUAN ,  LUO TAO ,  CHEN WANSHI

IPC: H04W74/00 ,  H04L1/00 ,  H04L1/18 ,  H04L5/00 ,  H04W68/00

Abstract: Un método de comunicación inalámbrica en un equipo de usuario, UE, que comprende: recibir (1005) al menos una concesión de enlace ascendente de una pluralidad de concesiones de enlace ascendente para una ráfaga de transmisión programada de referencia que incluye una pluralidad de intervalos de tiempo de transmisión, TTI, contiguos transmitidos a lo largo de una banda de espectro de radiofrecuencia compartida, en donde al menos una primera concesión de enlace ascendente en la pluralidad de concesiones de enlace ascendente incluye: una primera indicación de que la primera concesión de enlace ascendente está asociada con un primer TTI programado de la ráfaga de transmisión programada de referencia, una segunda indicación de una posición del primer TTI programado dentro de la ráfaga de transmisión programada de referencia, o una combinación de las mismas; transmitir (1010) durante al menos un TTI de la ráfaga de transmisión programada de referencia, de acuerdo con la al menos una concesión de enlace ascendente, comenzando la transmisión durante un primer TTI de transmisión; recibir (1015) una indicación de un TTI de referencia, usándose el TTI de referencia para la transmisión por el UE durante la ráfaga de transmisión programada de referencia; y determinar (1020) un tamaño de ventana de contienda usado por el UE para competir por el acceso a la banda de espectro de radiofrecuencia compartida, basándose la determinación, al menos en parte, en una relación entre el primer TTI programado, el TTI de referencia y el primer TTI de transmisión.