公开(公告)号：CA2923879A1

公开(公告)日：2015-04-09

申请号：CA2923879

申请日：2014-09-23

Applicant: QUALCOMM INC

Inventor： CHEN WANSHI ,  DAMNJANOVIC ALEKSANDAR ,  YERRAMALLI SRINIVAS ,  LUO TAO ,  GAAL PETER

IPC: H04W74/08

Abstract: Uplink control channel management is disclosed for LTE/LTE-A communication systems with unlicensed spectrum in which two or more physical resource blocks (PRBs) are allocated for uplink control channel transmission. The uplink control information (UCI) payload may be determined based on clear channel assessment (CCA) information associated with carriers scheduled for transmission of the UCI data. With the UCI payload determined, two or more uplink control channel messages may be generated according to at least one control channel format, wherein uplink control channel messages include the UCI payload. These generated uplink control channel messages may then be transmitted over the allocated PRBs.

公开(公告)号：CA2918359A1

公开(公告)日：2015-02-26

申请号：CA2918359

申请日：2014-08-22

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  LUO TAO ,  MALLADI DURGA ,  BHUSHAN NAGA ,  CHEN WANSHI ,  WEI YONGBIN

IPC: H04L1/18 ,  H04L1/16 ,  H04L5/00 ,  H04W16/14

Abstract: A sharing of common hybrid automatic repeat request (HARQ) process space by multiple unlicensed spectrum component carriers is described. Because communication access is not guaranteed over the unlicensed spectrum, a set of component carriers in the unlicensed spectrum is assigned to share a common HARQ process space, such that uplink or downlink data will be transmitted over any one or more of the set of component carriers that clear a clear channel assessment (CCA) check. The receiver then provides a HARQ process response over the same HARQ process space using the grouped component carriers that share that common HARQ process space. Thus, any one or more of the set of component carriers sharing the common HARQ process space may both carry the transmitted data and carry the HARQ process response to the attempted data transmission.

公开(公告)号：CA2915130A1

公开(公告)日：2015-01-22

申请号：CA2915130

申请日：2014-06-30

Applicant: QUALCOMM INC

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

IPC: H04W74/08

Abstract: Methods, systems, and devices are described for wireless communications. In one method, a clear channel assessment (CCA) may be performed at a base station to determine availability of an unlicensed spectrum. A first waveform may be transmitted to a set of user equipments (UEs) over the unlicensed spectrum when available. The first waveform may indicate a first time period and a second time period during which the base station has channel access over the unlicensed spectrum. A second waveform may be received from one or more UEs responsive to the first waveform. Each second waveform may be received over the unlicensed spectrum during the first time period and may indicate that the respective UE has channel access over the unlicensed spectrum to receive data from the base station during the second time period.

公开(公告)号：WO2018017354A2

公开(公告)日：2018-01-25

申请号：PCT/US2017041324

申请日：2017-07-10

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

CPC classification number: H04W72/0446 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0013 ,  H04L1/004 ,  H04L1/18 ,  H04L1/1825 ,  H04L1/1861 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0055 ,  H04Q2213/13215 ,  H04W16/14 ,  H04W28/0278 ,  H04W52/0216 ,  H04W52/146 ,  H04W52/367 ,  H04W56/0005 ,  H04W68/005 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/1226 ,  H04W72/1268 ,  H04W72/1284 ,  H04W72/1289 ,  H04W72/14 ,  H04W74/006 ,  H04W74/085

Abstract: Techniques are described for wireless communication. One method includes detecting a first reference signal received from a user equipment (UE) in a reference scheduled transmission burst including a plurality of contiguous transmission time intervals (TTIs) received over a shared radio frequency spectrum band; identifying a reference TTI in which the first reference signal is received; determining a contention window size usable by the UE to contend for access to the shared radio frequency spectrum band; and transmitting an indication of the determined contention window size to the UE.

公开(公告)号：WO2017027575A3

公开(公告)日：2017-03-23

申请号：PCT/US2016046322

申请日：2016-08-10

Applicant: QUALCOMM INC

Inventor： GAAL PETER ,  YERRAMALLI SRINIVAS ,  MALLADI DURGA PRASAD ,  WEI YONGBIN ,  GOROKHOV ALEXEI YURIEVITCH ,  BANISTER BRIAN ,  MCCLOUD MICHAEL LEE ,  LUO TAO ,  BHATTACHARJEE SUPRATIK ,  ZHANG CHENGJIN ,  SUKHAVASI RAVI TEJA

IPC: H04L5/00 ,  H04L5/14 ,  H04L27/00

CPC classification number: H04W76/048 ,  H04B7/0626 ,  H04L5/001 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/1469 ,  H04L27/0006 ,  H04W72/005 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/14

Abstract: Various aspects related to techniques for harmonization between common reference signal (CRS) and demodulation reference signal (DM-RS) based transmission modes (TMs) in unlicensed spectrum are described. In one aspect, a downlink/uplink (DL/UL) subframe configuration may be signaled for each subframe. Information provided by the DL/UL subframe configuration may indicate whether the respective downlink subframe is a single-frequency network (MBSFN) subframe (associated with DM-RS-based TM) or a non-MBSFN subframe (associated with CRS-based TM). In another aspect, periodic as well as aperiodic channel state information (CSI) reporting requests may be supported. In yet another aspect, discontinued reception (DRX) wake ups for unlicensed carriers may be explicitly or implicitly indicated to a user equipment (UE) via a carrier in a licensed spectrum.

Abstract translation: 描述了与用于在未经许可的频谱中的公共参考信号（CRS）和基于解调参考信号（DM-RS）的传输模式（TM）之间的协调的技术有关的各个方面。 在一个方面，可以针对每个子帧用信号发送下行链路/上行链路（DL / UL）子帧配置。 由DL / UL子帧配置提供的信息可以指示相应的下行链路子帧是单频网络（MBSFN）子帧（与基于DM-RS的TM相关联）还是非MBSFN子帧（与基于CRS的TM相关联） 。 另一方面，可支持周期性以及非周期性信道状态信息（CSI）报告请求。 在又一个方面中，可以通过许可频谱中的载波向用户设备（UE）显式或隐式地向非授权载波指示不连续接收（DRX）唤醒。

公开(公告)号：WO2015042594A3

公开(公告)日：2015-05-21

申请号：PCT/US2014057028

申请日：2014-09-23

Applicant: QUALCOMM INC

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

IPC: H04L5/00

CPC classification number: H04W74/0866 ,  H04J3/16 ,  H04J13/10 ,  H04L5/0041 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0094 ,  H04W16/14 ,  H04W72/0453 ,  H04W74/002

Abstract: Uplink waveforms for operating long term evolution (LTE) in an unlicensed band (i.e., long term evolution-unlicensed (LTE-U) communication) are disclosed. Carrier aggregation (CA) and standalone (SA) are disclosed. LTE on the licensed channel may provide both control and data, LTE on the unlicensed channel may provide data. Managing variable transmission time interval (TTI) continuous transmission is disclosed for transmission over multiple subframes of an unlicensed carrier in LTE-U. Listen-before-talk (LBT) requirements of unlicensed carriers provide for additional channel occupancy constraints when scheduling resources for multiple UEs for variable TTI continuous uplink transmissions over multiple subframes. A joint control channel is disclosed that provides control information for all of the potentially available subframes to be scheduled for the uplink transmissions. In addition to management of the variable TTI continuous transmissions, adjustments to uplink signal parameters are also disclosed that address the constraints due to the LBT requirements of unlicensed carriers.

Abstract translation: 公开了用于在未许可频带（即，长期进化 - 未许可（LTE-U）通信）中进行长期演进（LTE）的上行链路波形。 公开了载波聚合（CA）和独立（SA）。 许可频道上的LTE可以提供控制和数据两者，在非许可频道上的LTE可以提供数据。 公开了管理可变传输时间间隔（TTI）连续传输用于在LTE-U中的未许可载波的多个子帧上的传输。 在对多个UE进行可变TTI连续上行链路传输的多个子帧调度资源时，未经许可的载波的听话（LBT）要求提供额外的信道占用约束。 公开了一种联合控制信道，其提供用于针对上行链路传输调度的所有可能可用的子帧的控制信息。 除了可变TTI连续传输的管理之外，还公开了对上行链路信号参数的调整，其解决了由于未授权载波的LBT要求引起的约束。

公开(公告)号：CA3034015C

公开(公告)日：2022-06-07

申请号：CA3034015

申请日：2017-09-21

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  GAAL PETER

IPC: H04W74/08

Abstract: Handling uplink transmissions by UEs in unlicensed carrier components, in the context of 3GPP eLAA, enhanced license assisted access, and in particular, the configuration by the eNodeB of multi-carrier LBT, Listen Before Transmit, is discussed. The eNodeB signals together with the Uplink grant the LBT procedure to be used before transmitting in uplink, either a short, Category 2 LBT procedure, or else a longer, category 4 LBT procedure. The eNodeB signals, for a particular carrier component, the same LBT procedure it has used itself to sense and then securing the carrier. Also, when pauses occur during the uplink transmission on contention-based shared channels involved in eLAA communications, various procedures may be used to restart transmissions on the contention-based shared channels on the uplink when the original channel occupancy was reserved by a serving base station.

公开(公告)号：ZA201700878B

公开(公告)日：2022-05-25

申请号：ZA201700878

申请日：2017-02-03

Applicant: QUALCOMM INC

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

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：ES2903365T3

公开(公告)日：2022-04-01

申请号：ES18758787

申请日：2018-07-30

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  LIU CHIH-HAO ,  KADOUS TAMER

IPC: H04W36/00 ,  H04B1/713 ,  H04L5/00 ,  H04W24/10

Abstract: Un método para comunicación inalámbrica, que comprende: transmitir (1310) una configuración para la medición de celda asociada con un sistema de salto de frecuencia que incluye un canal de anclaje designado para habilitar el descubrimiento de celda y una pluralidad de frecuencias de salto para transmisiones de datos, en donde una señal de referencia de descubrimiento, DRS (310, 320), se transmite en el canal de anclaje y la DRS comprende una señal de sincronización primaria, PSS, una señal de sincronización secundaria, SSS, y un canal de radiodifusión físico, PBCH, en donde la configuración comprende al menos una brecha (330) de medición asociada con la DRS y no un canal (312) de datos de una celda vecina o grupo de celdas vecinas; y recibir (1320) un reporte de medición con base en la configuración.

公开(公告)号：AU2017272012B2

公开(公告)日：2022-03-17

申请号：AU2017272012

申请日：2017-05-17

Applicant: QUALCOMM INC

Inventor： YERRAMALLI SRINIVAS ,  PATEL CHIRAG SURESHBHAI ,  LUO TAO ,  GAAL PETER ,  MONTOJO JUAN ,  ZHANG XIAOXIA

IPC: H04L1/00 ,  H04L5/00

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for uplink control information (UCI) reporting. In certain aspects, a method includes receiving an indication of a number of symbols of a subframe available for uplink transmission. In certain aspects, the method further includes rate matching uplink control information (UCI) to the subframe based on the indication.