公开(公告)号：US20170324527A9

公开(公告)日：2017-11-09

申请号：US14925932

申请日：2015-10-28

Applicant: QUALCOMM Incorporated

Inventor： Wanshi CHEN ,  Tao LUO ,  Yi HUANG ,  Peter GAAL

IPC: H04L5/00 ,  H04L25/02

CPC classification number: H04L5/0048 ,  H04L5/0007 ,  H04L5/0051 ,  H04L25/0202 ,  H04L27/2613 ,  H04L27/2665 ,  H04W72/04

Abstract: Time tracking in current communication systems may be traditionally based on common reference signals (CRS). However, in certain communication systems, CRS-based time tracking may be impossible to implement due to an absence of CRS in certain subframes or carriers. CRS-based time tracking may also be inappropriate to implement in certain communication systems such as a coordinated multipoint (CoMP) system where control and data may arrive from different cells, and therefore, a UE may assume a wrong cell for CRS-based time tracking. Accordingly, methods, apparatuses, and computer program products for wireless communication are provided in which additional UE specific reference signals (UE-RS) and/or channel state information reference signals (CSI-RS) are made available to the UE so that the UE may have improved channel estimation and/or time tracking performance.

公开(公告)号：US20170230869A1

公开(公告)日：2017-08-10

申请号：US15268279

申请日：2016-09-16

Applicant: QUALCOMM Incorporated

Inventor： Keiichi KUBOTA ,  Tingfang JI ,  Tao LUO ,  Gavin Bernard HORN ,  John Edward SMEE ,  Ravi AGARWAL ,  Joseph Binamira SORIAGA ,  Saurabha Rangrao TAVILDAR

IPC: H04W36/00 ,  H04W76/02 ,  H04L5/00

Abstract: Aspects of the present disclosure provide methods and apparatus for beam selection in uplink-based and downlink-based mobility scenarios, for example, for new radio (NR) systems which can improve handover reliability, reduce handover frequency, and improve power efficiency. Certain aspects provide a method for wireless communications by a user equipment (UE). The method generally includes transmitting an uplink reference signal with an indication of a preferred downlink beam and receiving a downlink transmission based, at least in part, on the uplink reference signal.

公开(公告)号：US20170223728A1

公开(公告)日：2017-08-03

申请号：US15269743

申请日：2016-09-19

Applicant: QUALCOMM Incorporated

Inventor： Tao LUO ,  Peter Pui Lok ANG ,  Jing JIANG

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

CPC classification number: H04W72/14 ,  H04B10/516 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/1469 ,  H04W52/14 ,  H04W52/262 ,  H04W72/1289

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for grant processing in uplink centric subframes. An example method generally includes transmitting a first subframe comprising a first grant that includes information for one or more transmissions on that allocated resources in the first subframe to a user equipment (UE) and transmitting the first subframe, with a second grant that allocates resources in at least a second subframe to occur after the first subframe. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20170223651A1

公开(公告)日：2017-08-03

申请号：US15421146

申请日：2017-01-31

Applicant: QUALCOMM Incorporated

Inventor： Chirag Sureshbhai PATEL ,  Tao LUO ,  Andrei Dragos RADULESCU ,  Ahmed Kamel SADEK ,  Tamer Adel KADOUS

IPC: H04W56/00 ,  H04W24/08 ,  H04W72/04

CPC classification number: H04W56/0015 ,  H04L5/0048 ,  H04W16/14 ,  H04W24/02 ,  H04W24/08 ,  H04W56/002 ,  H04W72/0446 ,  H04W74/02 ,  H04W74/0808 ,  H04W88/08

Abstract: Techniques for intra- and inter-operator coordination on a shared communication medium are disclosed. A central coordination server may send an operating mode information message to coordinate operation of different points on the communication medium. An access point may receive such an operating mode information message and adjust one or more communication parameters. An access point may determine a level of timing synchronization with neighboring access points and send a synchronization advertisement message to an access terminal. An access terminal may receive a synchronization advertisement message and perform one or more measurements of the neighboring access points.

公开(公告)号：US20170171879A1

公开(公告)日：2017-06-15

申请号：US15373427

申请日：2016-12-08

Applicant: QUALCOMM Incorporated

Inventor： Jing JIANG ,  Tao LUO ,  Tingfang JI ,  Peter Pui Lok ANG ,  Joseph Binamira SORIAGA ,  Krishna Kiran MUKKAVILLI

IPC: H04W72/12 ,  H04J3/16 ,  H04L1/18 ,  H04W72/04 ,  H04L5/00

CPC classification number: H04W72/1273 ,  H04J3/1694 ,  H04L1/008 ,  H04L1/1607 ,  H04L1/1854 ,  H04L1/1887 ,  H04L5/0055 ,  H04L5/14 ,  H04W72/0413

Abstract: Certain aspects relate to methods and apparatus for a flexible transmission unit and acknowledgement feedback timeline for low-latency communication. As described herein, a UE may receive, within a subframe a first portion of a downlink control region scheduling at least a first data unit, wherein the subframe comprises at least two TTIs and wherein the subframe comprises the downlink control region, a data region, and an uplink control region, receive the first data unit in a first TTI of the data region, receive a second data unit in a second TTI of the data region, and separately acknowledge receipt of the first and second data units. According to aspects, the acknowledgment for the first data unit may occur in the same subframe as the transmission of the first data unit. A BS may perform corresponding operations.

公开(公告)号：US20170126377A1

公开(公告)日：2017-05-04

申请号：US14925932

申请日：2015-10-28

Applicant: QUALCOMM Incorporated

Inventor： Wanshi CHEN ,  Tao LUO ,  Yi HUANG ,  Peter GAAL

IPC: H04L5/00 ,  H04L25/02

CPC classification number: H04L5/0048 ,  H04L5/0007 ,  H04L5/0051 ,  H04L25/0202 ,  H04L27/2613 ,  H04L27/2665 ,  H04W72/04

Abstract: Time tracking in current communication systems may be traditionally based on common reference signals (CRS). However, in certain communication systems, CRS-based time tracking may be impossible to implement due to an absence of CRS in certain subframes or carriers. CRS-based time tracking may also be inappropriate to implement in certain communication systems such as a coordinated multipoint (CoMP) system where control and data may arrive from different cells, and therefore, a UE may assume a wrong cell for CRS-based time tracking. Accordingly, methods, apparatuses, and computer program products for wireless communication are provided in which additional UE specific reference signals (UE-RS) and/or channel state information reference signals (CSI-RS) are made available to the UE so that the UE may have improved channel estimation and/or time tracking performance.

公开(公告)号：US20170126346A1

公开(公告)日：2017-05-04

申请号：US15264850

申请日：2016-09-14

Applicant: QUALCOMM Incorporated

Inventor： Arumugam CHENDAMARAI KANNAN ,  Tao LUO ,  Chirag Sureshbhai PATEL ,  Tamer Adel KADOUS

IPC: H04J3/16 ,  H04L5/14 ,  H04W72/04

CPC classification number: H04J3/1694 ,  H04L5/0053 ,  H04L5/1469 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/0446 ,  H04W74/02 ,  H04W74/08

Abstract: Disclosed are techniques for accessing a shared communication medium. An aspect includes communicating over the shared communication medium in accordance with a Time Division Duplexing (TDD) frame structure defining a set of downlink subframes and a set of uplink subframes, each uplink subframe being divided into a transmission gap period, a contention-exempt period, and a contention-compliant period, performing a contention procedure for contending for access to the shared communication medium during the transmission gap period, selectively transmitting contention-compliant uplink control signals during the contention-compliant period, and transmitting one or more contention-exempt uplink control signals during the contention-exempt period. An aspect includes receiving a downlink subframe of the shared communication medium and transmitting an acknowledgment of the downlink subframe during an uplink subframe of the shared communication medium, the uplink subframe occurring at least a predetermined number of subframes and/or at least a predetermined amount of time after the downlink subframe.

公开(公告)号：US20170055291A1

公开(公告)日：2017-02-23

申请号：US15240476

申请日：2016-08-18

Applicant: QUALCOMM Incorporated

Inventor： Alexei GOROKHOV ,  Peter GAAL ,  Nachiappan VALLIAPPAN ,  Chirag PATEL ,  Ahmed SADEK ,  Brian BANISTER ,  Tao LUO ,  Tamer KADOUS

IPC: H04W74/08 ,  H04W72/12 ,  H04L5/00 ,  H04W16/14 ,  H04L5/14

CPC classification number: H04W74/0816 ,  H04L5/005 ,  H04L5/14 ,  H04W16/14 ,  H04W72/1215 ,  H04W74/002 ,  H04W84/12

Abstract: Techniques for reservation coordination on a shared communication medium are disclosed. An access point, for example, may contend for access to a communication medium, and transmit a channel reservation message in accordance with a first Radio Access Technology (RAT) to reserve the communication medium for a transmission opportunity (TXOP) duration based on the contending. The access point may then transmit, during the reserved TXOP duration, a reservation coordination signal in accordance with a second RAT to convey reservation coordination information associated with the reserved TXOP duration.

Abstract translation: 公开了在共享通信介质上进行预约协调的技术。 例如，接入点可以竞争访问通信介质，并且根据第一无线电接入技术（RAT）发送信道预留消息，以基于竞争的时间来为传输机会（TXOP）持续时间保留通信介质 。 接入点然后可以在保留的TXOP持续时间期间根据第二RAT发送预留协调信号，以传送与保留的TXOP持续时间相关联的预留协调信息。

公开(公告)号：US20170048796A1

公开(公告)日：2017-02-16

申请号：US15335386

申请日：2016-10-26

Applicant: QUALCOMM Incorporated

Inventor： Hao XU ,  Durga Prasad MALLADI ,  Yongbin WEI ,  Peter GAAL ,  Wanshi CHEN ,  Aleksandar DAMNJANOVIC ,  Tao LUO

IPC: H04W52/02

CPC classification number: H04W52/0225 ,  H04B7/14 ,  H04L5/0007 ,  H04W52/0206 ,  H04W52/0209 ,  H04W52/0216 ,  H04W52/0229 ,  H04W74/0833 ,  H04W88/04 ,  H04W88/08 ,  Y02B70/30 ,  Y02D70/00 ,  Y02D70/122 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/21 ,  Y02D70/24 ,  Y02D70/25

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus identifies first entity and transmits a very low duty cycle signal (LDCS) configuration of the first entity. The apparatus may comprise, e.g., an LPN that is not in a dormant state or a macrocell. The apparatus may receive LDCS information for the first entity. The apparatus may determine the LDCS configuration and transmit the LDCS configuration to the first entity.

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。 该装置识别第一实体并且发送第一实体的非常低的占空比信号（LDCS）配置。 该装置可以包括例如不处于休眠状态的LPN或宏小区。 设备可以接收第一实体的LDCS信息。 该设备可以确定LDCS配置并将LDCS配置发送到第一实体。

公开(公告)号：US20170034670A1

公开(公告)日：2017-02-02

申请号：US15222745

申请日：2016-07-28

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia ZHANG ,  Srinivas YERRAMALLI ,  Tao LUO

IPC: H04W4/06 ,  H04W74/08 ,  H04W16/14

CPC classification number: H04W4/06 ,  H04W16/14 ,  H04W56/001 ,  H04W72/005 ,  H04W74/006 ,  H04W74/08

Abstract: A method and apparatus for adjusting preamble transmissions to maintain synchronization with other network entities operating in an unlicensed spectrum during wireless communications are described. The method and apparatus include accessing, by a second node, a contention-based medium currently accessed by a first node transmitting a first burst of data. The method and apparatus further include transmitting, by the second node, a second burst of data over the accessed medium, the second burst of data having an associated preamble configured not to interfere with a joint transmission portion of the first burst of data. The first and second nodes may be enhanced-multimedia broadcast multicast service (eMBMS) nodes. Moreover, the joint transmission portion of the first burst of data may include transmission of one or more multicast-broadcast single-frequency network (MBSFN) subframes.

Abstract translation: 描述了一种用于在无线通信期间调整前导码传输以维持与在非许可频谱中操作的其他网络实体的同步的方法和装置。 该方法和装置包括由第二节点访问当前由发送第一数据突发的第一节点访问的基于竞争的媒体。 所述方法和装置还包括由所述第二节点通过所访问的介质发送第二数据突发，所述第二数据突发具有被配置为不干扰所述第一数据突发的联合传输部分的相关联的前导码。 第一和第二节点可以是增强型多媒体广播多播服务（eMBMS）节点。 此外，第一数据突发的联合传输部分可以包括一个或多个多播广播单频网络（MBSFN）子帧的传输。