公开(公告)号：US20180332551A1

公开(公告)日：2018-11-15

申请号：US15855442

申请日：2017-12-27

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao LIU ,  Srinivas YERRAMALLI ,  Tamer KADOUS

IPC: H04W56/00

Abstract: Methods, systems, and devices for wireless communication are described for synchronization for wideband coverage enhancement. A user equipment (UE) may receive a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in a subframe. In one example, the SSS may be received in a symbol that is after a symbol in which the PSS is received, and after a set of symbols in which a set of other synchronization signals is received. In another example, the PSS may be received in each of a first plurality of consecutive symbols, and the SSS may be received in each of a second plurality of consecutive symbols, wherein the second plurality of consecutive symbols is after the first plurality of consecutive symbols within the subframe. The UE may synchronize with a base station based at least in part on the PSS and the SSS. Numerous other aspects are provided.

公开(公告)号：US20180270818A1

公开(公告)日：2018-09-20

申请号：US15986758

申请日：2018-05-22

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Wanshi CHEN ,  Peter GAAL ,  Xiaoxia ZHANG

IPC: H04W72/04 ,  H04W16/14 ,  H04L5/00 ,  H04L1/18

Abstract: In enhanced licensed assisted access (eLAA), providing several approaches to report the CSI measurement may be desirable to provide flexibility in CSI reporting, especially in aperiodic CSI reporting. Further, a difference in using a licensed carrier and an unlicensed carrier may be considered during communication. In addition, assigning different transmit power usage based on different transmission types may be desired. The apparatus may be a user equipment (UE). The apparatus may be a UE. The UE receives a grant for uplink communication. The UE determines a reporting subframe based on the grant. The UE determines whether to select, as a reference subframe, a triggering subframe in which the grant is received or a subframe before the reporting subframe. The UE transmits, in the reporting subframe, channel state information (CSI) measured in the reference subframe.

公开(公告)号：US20180235000A1

公开(公告)日：2018-08-16

申请号：US15955471

申请日：2018-04-17

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar DAMNJANOVIC ,  Tao LUO ,  Srinivas YERRAMALLI ,  Peter GAAL ,  Hao XU ,  Wanshi CHEN

IPC: H04W72/12 ,  H04W72/04 ,  H04W74/00 ,  H04W74/08

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. A base station transmits a provisional grant uplink assignment to a set of UEs. When a UE receives the provisional grant uplink assignment, the UE performs a clear channel assessment (CCA) operation on a secondary component carrier (SCC) based on the provisional grant UL assignment, the SCC being a contention-based carrier. Then, the UE transmits a schedule request (SR) on the SCC when the CCA operation succeeds. The base station transmits grant confirmation(s) on the SCC in response to the detected SR(s). Once the UE receives a grant confirmation on the SCC in response to the SR, the UE transmits data on the SCC.

公开(公告)号：US20180124776A1

公开(公告)日：2018-05-03

申请号：US15635018

申请日：2017-06-27

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tamer KADOUS ,  Chih-Hao LIU ,  Chirag PATEL ,  Alberto RICO ALVARINO

IPC: H04W72/04 ,  H04L5/00 ,  H04W4/00

Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A user equipment apparatus segments an uplink duration in each frame into multiple transmission units for each frequency, wherein a frame comprises an integer number of the transmission units. The apparatus transmits uplink communication based on the multiple transmission units, wherein each transmission unit comprises at least one on period and at least one off period corresponding to each of a plurality of frequencies, wherein during an on period the UE transmits uplink communication on the corresponding frequency and during an off period the UE refrains from transmitting uplink communication on the corresponding frequency. Each transmission unit may comprise multiple on periods and multiple off periods. The on/off periods may be configured by a base station or specified for each frame type.

公开(公告)号：US20180042012A1

公开(公告)日：2018-02-08

申请号：US15461280

申请日：2017-03-16

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Wanshi CHEN ,  Peter GAAL ,  Xiaoxia ZHANG

IPC: H04W72/04 ,  H04L5/00 ,  H04W16/14 ,  H04L1/18

CPC classification number: H04W72/0446 ,  H04L1/1861 ,  H04L5/0057 ,  H04W16/14 ,  H04W72/02 ,  H04W72/042

Abstract: In enhanced licensed assisted access (eLAA), providing several approaches to report the CSI measurement may be desirable to provide flexibility in CSI reporting, especially in aperiodic CSI reporting. Further, a difference in using a licensed carrier and an unlicensed carrier may be considered during communication. In addition, assigning different transmit power usage based on different transmission types may be desired. The apparatus may be a user equipment (UE). The apparatus may be a UE. The UE receives a grant for uplink communication. The UE determines a reporting subframe based on the grant. The UE determines whether to select, as a reference subframe, a triggering subframe in which the grant is received or a subframe before the reporting subframe. The UE transmits, in the reporting subframe, channel state information (CSI) measured in the reference subframe.

公开(公告)号：US20180020360A1

公开(公告)日：2018-01-18

申请号：US15610869

申请日：2017-06-01

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Alberto RICO ALVARINO ,  Hao XU ,  Wanshi CHEN ,  Juan MONTOJO ,  Yongbin WEI ,  Peter GAAL

IPC: H04W16/14 ,  H04B1/713 ,  H04W56/00 ,  H04B1/7156

CPC classification number: H04W72/0453 ,  H04B1/713 ,  H04B1/7143 ,  H04B1/7156 ,  H04B1/7183 ,  H04B2001/71563 ,  H04L5/001 ,  H04L5/0012 ,  H04L5/0048 ,  H04L5/0098 ,  H04L27/0006 ,  H04L27/2634 ,  H04L27/2655 ,  H04L67/12 ,  H04W16/14 ,  H04W52/143 ,  H04W52/146 ,  H04W52/346 ,  H04W56/00 ,  H04W56/0005 ,  H04W56/0015 ,  H04W72/042 ,  H04W72/0473 ,  H04W74/006 ,  H04W74/085 ,  H04W76/27 ,  H04W76/28 ,  H04W88/08

Abstract: Various aspects of utilizing narrowband internet of things (NB IOT) communication are still under development. According to an aspect of the disclosure, the apparatus may be a user equipment (UE) for wireless communication via narrowband internet of things (NB IOT) in an unlicensed spectrum using frequency hopping and digital modulation. The UE performs a synchronization with a base station via at least one of a licensed spectrum or the unlicensed spectrum. The UE communicates with the base station based on the synchronization.

公开(公告)号：US20170373793A1

公开(公告)日：2017-12-28

申请号：US15615481

申请日：2017-06-06

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Wanshi CHEN ,  Peter GAAL

IPC: H04L1/00 ,  H04L27/26 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04L1/0038 ,  H04L1/0052 ,  H04L5/001 ,  H04L5/0053 ,  H04L27/2607

Abstract: Aspects described herein relate to managing blind decoding of a control channel search space. A number of blind decodes configured for a control channel search space can be determined based at least in part on one or more parameters broadcasted by a access point that transmits a control channel in the control channel search space. One or more reduction values can be determined for the number of blind decodes at the UE. A pattern for performing a subset of the number of blind decodes can be determined based at least in part on the one or more reduction values. Blind decoding can be performed for the control channel based on the pattern for performing the subset of the number of blind decodes to obtain control data transmitted in the control channel.

公开(公告)号：US20170048919A1

公开(公告)日：2017-02-16

申请号：US15232672

申请日：2016-08-09

Applicant: QUALCOMM Incorporated

Inventor： Peter GAAL ,  Srinivas YERRAMALLI ,  Durga Prasad MALLADI ,  Yongbin WEI ,  Alexei Yurievitch GOROKHOV ,  Brian BANISTER ,  Michael Lee MCCLOUD ,  Tao LUO ,  Supratik BHATTACHARJEE ,  Chengjin ZHANG ,  Ravi Teja SUKHAVASI

IPC: H04W76/04 ,  H04W72/00 ,  H04W72/14 ,  H04W72/04 ,  H04B7/06

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: 描述与非许可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）之间的协调技术相关的各个方面。 在一个方面，可以为每个子帧发信号通知下行链路/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） 。 在另一方面，可以支持周期性和非周期性信道状态信息（CSI）报告请求。 在另一方面，可以通过许可频谱中的运营商向用户设备（UE）明确地或隐含地指示用于未授权载体的中断接收（DRX）唤醒。

公开(公告)号：US20160302225A1

公开(公告)日：2016-10-13

申请号：US15072104

申请日：2016-03-16

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar DAMNJANOVIC ,  Tao LUO ,  Srinivas YERRAMALLI ,  Peter GAAL ,  Hao XU ,  Wanshi CHEN

IPC: H04W72/12

CPC classification number: H04W72/1294 ,  H04W72/04 ,  H04W72/12 ,  H04W72/1284 ,  H04W74/006 ,  H04W74/08

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. An eNB transmits an indicator for a frame identifying a DL transmission period. The indicator may comprise a frame format indicator identifying only a plurality of downlink subframes scheduled for a contention-based carrier. The eNB may transmit a second indicator for an UL transmission period and may grant a UE at least one UL subframe for UL transmission. The UE monitors for an UL grant and for a D-CUBS at either the end of the DL subframes or after an UL assignment. The eNB may transmit a provisional grant UL assignment for UL transmission on an SCC and respond with a grant confirmation in response to an SR granting the UE resources for UL data transmission.

Abstract translation: 提供了一种用于无线通信的方法，装置和计算机程序产品。 eNB发送用于标识DL传输周期的帧的指示符。 指示符可以包括仅标识为基于竞争的载波调度的多个下行链路子帧的帧格式指示符。 eNB可以发送用于UL传输周期的第二指示符，并且可以向UE授予至少一个UL子帧用于UL传输。 UE在DL子帧的末端或在UL分配之后监视UL授权和对于D-CUBS。 eNB可以在SCC上发送用于UL传输的临时授权UL分配，并响应于授予用于UL数据传输的UE资源的SR响应于授权确认。

公开(公告)号：US20160227476A1

公开(公告)日：2016-08-04

申请号：US15009730

申请日：2016-01-28

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tao LUO ,  Aleksandar DAMNJANOVIC ,  Peter GAAL

IPC: H04W48/16 ,  H04W24/08 ,  H04W56/00 ,  H04W72/04 ,  H04L5/00

CPC classification number: H04W48/16 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/0006 ,  H04W24/08 ,  H04W48/08 ,  H04W56/00 ,  H04W72/042 ,  H04W74/0808 ,  H04W84/045 ,  H04W88/02

Abstract: Apparatus and methods for transmitting and discovering timing information during wireless communications are described herein. In an aspect, the systems and methods include monitoring at a user equipment (UE) over an unlicensed radio frequency spectrum band for a discovery signal from a network entity; receiving the discovery signal during a subframe from the network entity; and determining a current subframe location of the network entity based on the discovery signal, wherein the discovery signal includes timing information corresponding to the current subframe location.

Abstract translation: 本文描述了用于在无线通信期间发送和发现定时信息的装置和方法。 在一个方面，所述系统和方法包括通过未经许可的射频频带在用户设备（UE）处监测来自网络实体的发现信号; 在来自网络实体的子帧期间接收发现信号; 以及基于所述发现信号确定所述网络实体的当前子帧位置，其中所述发现信号包括对应于当前子帧位置的定时信息。