公开(公告)号：WO2018080641A1

公开(公告)日：2018-05-03

申请号：PCT/US2017/050424

申请日：2017-09-07

Applicant: QUALCOMM INCORPORATED

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

IPC: H04W48/12 ,  H04L5/00

Abstract: This disclosure includes methods, systems, and devices for wireless communication. A repetition of symbols may be used to increase a device's ability to synchronize and communicate using unlicensed spectrum. For example, a base station may schedule a frame that includes repetitions, in time or frequency, of a control or data signal. After performing a listen-before-talk (LBT) procedure, the base station may broadcast or transmit the frame to one or more devices, such as a user equipment (UE). For instance, the frame may include repetitions of a discovery reference signal (DRS), and be broadcast by the base station to enable synchronization by the UE. In other examples, the signal may include repetitions of a cell-specific reference signal (CRS), and a UE may identify a start of a transmission opportunity using the CRSs. Other signals, such as downlink control and shared channels, may be repeated within a frame in a similar manner.

Abstract translation: 本公开包括用于无线通信的方法，系统和设备。 可以使用符号的重复来增加设备使用未经许可的频谱进行同步和通信的能力。 例如，基站可以调度包括控制或数据信号在时间或频率上的重复的帧。 在执行先听后说（LBT）过程之后，基站可以向一个或多个设备（例如用户设备（UE））广播或发送该帧。 例如，该帧可以包括发现参考信号（DRS）的重复，并且由基站广播以实现UE的同步。 在其他示例中，该信号可以包括小区特定参考信号（CRS）的重复，并且UE可以使用CRS识别传输机会的开始。 其他信号，例如下行链路控制和共享信道，可以以类似方式在帧内重复。

公开(公告)号：WO2018022229A1

公开(公告)日：2018-02-01

申请号：PCT/US2017/039062

申请日：2017-06-23

Applicant: QUALCOMM INCORPORATED

Inventor： YERRAMALLI, Srinivas ,  CHEN, Wanshi ,  SUN, Jing ,  GAAL, Peter

IPC: H04W74/08 ,  H04W72/02

Abstract: Various aspects described herein relate to reducing transmission latency in unlicensed spectrum including listen-before-talk access. A dedicated ultra low latency (ULL) data bearer having LBT access rules is established, which access rules allow channel access with faster access priority than control and signal traffic. ULL data is mapped to the dedicated ULL data bearer based on the LBT access rules and channel selection is performed in a portion of the unlicensed frequency spectrum using the LBT access rules. These latency reduction techniques include enabling ULL traffic to gain fast channel access. These latency reduction techniques further include updating a size of a contention window for channel access. In addition, these latency reduction techniques include enhancing CPDCCH-based signaling to accommodate the ULL frame structure. Further, these latency reduction techniques include providing robust operation against bursty interference for ULL transmissions. Moreover, these techniques include managing DRX for ULL. Additionally, these latency reduction techniques include joint scheduling of different TTI durations. These latency reduction techniques further include updating SRS transmission opportunities. In addition, these latency reduction techniques include reducing latency associated with PRACH transmissions. Further, these latency reduction techniques include reducing ULL transmission delays by either ignoring or cancelling scheduled uplink (e.g., LTE) transmissions.

Abstract translation: 这里描述的各个方面涉及减少包括听先讲话访问在内的未经许可的频谱中的传输等待时间。 具有LBT访问规则的专用超低延迟（ULL）数据承载被建立，该访问规则允许以比控制和信号业务更快的访问优先权进行信道访问。 基于LBT接入规则将ULL数据映射到专用ULL数据承载，并且使用LBT接入规则在非授权频谱的一部分中执行信道选择。 这些延迟减少技术包括启用ULL业务以获得快速信道接入。 这些等待时间减少技术还包括更新信道访问的争用窗口的大小。 另外，这些等待时间减少技术包括增强基于CPDCCH的信令以适应ULL帧结构。 此外，这些等待时间减少技术包括针对ULL传输的突发干扰提供稳健的操作。 此外，这些技术还包括管理用于ULL的DRX。 另外，这些等待时间减少技术包括不同TTI持续时间的联合调度。 这些等待时间减少技术还包括更新SRS传输机会。 另外，这些等待时间减少技术包括减少与PRACH传输相关的等待时间。 此外，这些等待时间减少技术包括通过忽略或取消调度的上行链路（例如，LTE）传输来减少ULL传输延迟。

公开(公告)号：WO2018017354A3

公开(公告)日：2018-01-25

申请号：PCT/US2017/041324

申请日：2017-07-10

Applicant: QUALCOMM INCORPORATED

Inventor： YERRAMALLI, Srinivas ,  GAAL, Peter ,  MONTOJO, Juan ,  LUO, Tao ,  CHEN, Wanshi

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

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：WO2018005021A1

公开(公告)日：2018-01-04

申请号：PCT/US2017/036189

申请日：2017-06-06

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Wanshi ,  SUN, Jing ,  RICO ALVARINO, Alberto ,  YERRAMALLI, Srinivas

IPC: H04W72/04

Abstract: Techniques for wireless communication are described. A method for wireless communication at a user equipment (UE) includes identifying a physical uplink shared channel (PUSCH) to transmit in an uplink pilot time slot (UpPTS) of a subframe, determining whether to transmit uplink control information (UCI) on the PUSCH in the UpPTS, and transmitting the PUSCH in the UpPTS based at least in part on the determining. A method for wireless communication at a network access device includes determining whether to schedule a transmission of UCI on a PUSCH in a UpPTS of a subframe, scheduling the PUSCH in the UpPTS based at least in part on the determining, and transmitting, to a UE, scheduling information for the PUSCH in the UpPTS.

Abstract translation: 描述了用于无线通信的技术。 一种用于在用户设备（UE）处进行无线通信的方法包括：识别要在子帧的上行链路导频时隙（UpPTS）中发送的物理上行链路共享信道（PUSCH）;确定是否在PUSCH上发送上行链路控制信息（UCI） 在UpPTS中，并且至少部分基于该确定在UpPTS中发送PUSCH。 一种用于网络接入设备处的无线通信的方法包括：确定是否在子帧的UpPTS中在PUSCH上调度UCI的传输;至少部分地基于确定并且向UE发送来调度UpPTS中的PUSCH; ，为UpPTS中的PUSCH调度信息。

公开(公告)号：WO2017214011A1

公开(公告)日：2017-12-14

申请号：PCT/US2017/035888

申请日：2017-06-05

Applicant: QUALCOMM INCORPORATED

Inventor： YERRAMALLI, Srinivas ,  LUO, Tao ,  ZHANG, Xiaoxia ,  MALLADI, Durga Prasad

IPC: H04W74/00 ,  H04L1/00 ,  H04W74/08

CPC classification number: H04W74/0833 ,  H04L1/00 ,  H04L1/0026 ,  H04L1/0027 ,  H04L5/0048 ,  H04L5/0057 ,  H04W24/10 ,  H04W56/001 ,  H04W72/0446 ,  H04W74/004 ,  H04W74/08 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive, from a base station, a downlink transmission in a radio frequency spectrum band and may identify reference resources in the downlink transmission for computing a channel state information (CSI) report. The UE may generate the CSI report based at least in part on the identified reference resources and transmit, in the radio frequency spectrum band, the CSI report in a random access request message to the base station. The base station may receive the request message and identify CSI associated with the band based at least in part on the CSI report included in the random access request message. The base station may transmit, to the UE, a random access response message based at least in part on the identified CSI in the radio frequency spectrum band.

Abstract translation: 描述了用于无线通信的方法，系统和设备。 用户设备（UE）可以从基站接收无线电频谱频带中的下行链路传输，并且可以识别下行链路传输中的参考资源以用于计算信道状态信息（CSI）报告。 UE可以至少部分地基于所标识的参考资源来生成CSI报告，并且在无线电频谱频带中将CSI报告以随机接入请求消息发送给基站。 基站可以至少部分地基于随机接入请求消息中包括的CSI报告来接收请求消息并识别与频带相关联的CSI。 基站可以至少部分地基于在射频频谱带中识别的CSI向UE发送随机接入响应消息。

公开(公告)号：WO2017165723A1

公开(公告)日：2017-09-28

申请号：PCT/US2017/023943

申请日：2017-03-24

Applicant: QUALCOMM INCORPORATED

Inventor： YERRAMALLI, Srinivas ,  DAMNJANOVIC, Aleksandar ,  GAAL, Peter ,  MONTOJO, Juan

IPC: H04W74/08

CPC classification number: H04W72/1268 ,  H04Q2213/13215 ,  H04W16/14 ,  H04W28/0278 ,  H04W72/10 ,  H04W72/14 ,  H04W74/0808 ,  H04W76/27 ,  H04W88/02

Abstract: Techniques are described for wireless communication. One method for wireless communication at a user equipment (UE) includes receiving, over the air, information indicative of at least one type of LBT procedure to perform for an uplink transmission; identifying, from the received information, the at least one type of LBT procedure to perform for the uplink transmission; and performing, for a shared spectrum, the at least one type of LBT procedure for the uplink transmission. One method for wireless communication at a network access device includes scheduling an uplink transmission of a UE in a shared spectrum, and transmitting, over the air, information indicative of at least one type of LBT procedure to perform for the uplink transmission.

Abstract translation: 描述了用于无线通信的技术。 用于用户设备（UE）处的无线通信的一种方法包括通过空中接收指示要对上行链路传输执行的至少一种类型的LBT过程的信息; 从所接收的信息中识别要对所述上行链路传输执行的所述至少一种类型的LBT过程; 以及针对共享频谱执行用于所述上行链路传输的所述至少一种类型的LBT过程。 一种用于网络接入设备处的无线通信的方法包括调度共享频谱中的UE的上行链路传输，以及通过空中传输指示要为上行链路传输执行的至少一种类型的LBT过程的信息。

公开(公告)号：WO2017083577A1

公开(公告)日：2017-05-18

申请号：PCT/US2016/061419

申请日：2016-11-10

Applicant: QUALCOMM INCORPORATED

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

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04L1/1861 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0091 ,  H04W16/14 ,  H04W72/048

Abstract: Techniques are provided that enable signaling of physical layer parameters in a shared radio frequency spectrum band or a dedicated radio frequency spectrum band (or any available radio frequency spectrum band). One or more physical layer channels may be used to transmit physical layer parameters, and different portions of the channel(s) may carry physical layer information for different groups of UEs. A base station may configure a UE into a UE group that monitors particular channel resources based on the UE group. In this manner, a base station may transmit physical layer parameters that may be received by a UE for receiving wireless communications for one or more subframe. A base station may transmit physical layer parameters to be monitored by the use using a physical hybrid automatic repeat request (HARQ) indicator channel (PHICH), a physical control format indicator channel (PCFICH), a physical downlink control channel (PDCCH), or combinations thereof.

Abstract translation: 提供了在共享无线电频谱频带或专用无线电频谱频带（或任何可用无线电频谱频带）中发信号通知物理层参数的技术。 一个或多个物理层信道可以用于传输物理层参数，并且信道的不同部分可以携带用于不同UE组的物理层信息。 基站可以将UE配置成基于UE组监视特定信道资源的UE组。 以这种方式，基站可以发送可以由UE接收的物理层参数，用于接收一个或多个子帧的无线通信。 基站可以使用物理混合自动重传请求（HARQ）指示符信道（PHICH），物理控制格式指示符信道（PCFICH），物理下行链路控制信道（PDCCH）或者物理控制信道

公开(公告)号：WO2017065875A1

公开(公告)日：2017-04-20

申请号：PCT/US2016/048555

申请日：2016-08-25

Applicant: QUALCOMM INCORPORATED

Inventor： DAMNJANOVIC, Aleksandar ,  WENTINK, Maarten, Menzo ,  YERRAMALLI, Srinivas ,  WANG, Qingsi ,  WEI, Yongbin ,  MONTOJO, Juan

IPC: H04W74/08 ,  H04W16/14 ,  H04W24/10 ,  H04W88/06

CPC classification number: H04W74/0825 ,  H04L5/0055 ,  H04W16/14 ,  H04W74/0858 ,  H04W84/12 ,  H04W88/06

Abstract: Detection and reporting techniques for collisions between transmitters of two different radio access technologies (RATs) transmitting in a shared radio frequency spectrum band is described. The collision may occur following a listen-before-talk procedure but prior to transmission of data, and may not affect the reception of the transmitted data. Collisions may be detected using for example, energy sensing, preamble or ready-to-send (RTS) signal detection, or unsuccessful decoding of all or part of a channel reservation signal. A transmitting device may determine a collision has occurred by detecting an energy level during a preamble transmission is greater than a threshold level or by detecting that an energy level during a transmission gap of a time-domain energy pattern is above a threshold level. A receiving device, such as a user equipment (UE), that detects the collision may report the collision to the transmitter.

Abstract translation: 描述了用于在共享无线电频谱带中发射的两种不同无线电接入技术（RAT）的发射机之间的冲突的检测和报告技术。 碰撞可能发生在先听后讲程序之后但在数据传输之前发生，并且可能不会影响发送数据的接收。 可以使用例如能量感测，前导或准备发送（RTS）信号检测或者对全部或部分信道预留信号的不成功解码来检测碰撞。 发射设备可以通过检测前导码发射期间的能量水平大于阈值水平或者通过检测在时域能量图案的发射间隙期间的能量水平高于阈值水平来确定发生了碰撞。 诸如用户设备（UE）之类的接收设备检测到冲突可以将该冲突报告给发射机。

公开(公告)号：WO2017044304A1

公开(公告)日：2017-03-16

申请号：PCT/US2016/048269

申请日：2016-08-24

Applicant: QUALCOMM INCORPORATED

Inventor： ZHANG, Xiaoxia ,  YERRAMALLI, Srinivas ,  LUO, Tao

IPC: H04W74/08

CPC classification number: H04W72/005 ,  H04L5/0035 ,  H04W4/06 ,  H04W16/14 ,  H04W74/004 ,  H04W74/0816

Abstract: Techniques are described for wireless communications. One method includes determining a contention window size for a first broadcast transmission or a first multicast transmission on at least one channel of a shared radio frequency spectrum band, where the first broadcast transmission or the first multicast transmission is targeted for a first plurality of UEs, and contending for access to the at least one channel of the shared radio frequency spectrum band for the first broadcast transmission or the first multicast transmission based at least in part on the determined contention window size. In some cases, the first broadcast transmission or the first multicast transmission may be an example of a multipoint transmission, which may include a coordinated multipoint transmission.

Abstract translation: 技术描述为无线通信。 一种方法包括在共享射频频带的至少一个信道上确定用于第一广播传输或第一多播传输的竞争窗口大小，其中第一广播传输或第一多播传输针对第一多个UE， 并且至少部分地基于所确定的竞争窗口大小，争取访问用于第一广播传输或第一多播传输的共享射频频带的至少一个信道。 在一些情况下，第一广播传输或第一多播传输可以是多点传输的示例，其可以包括协调的多点传输。

公开(公告)号：WO2017027575A2

公开(公告)日：2017-02-16

申请号：PCT/US2016/046322

申请日：2016-08-10

Applicant: QUALCOMM INCORPORATED

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: H04W76/28 ,  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。