公开(公告)号：US10798627B2

公开(公告)日：2020-10-06

申请号：US15258555

申请日：2016-09-07

Applicant: QUALCOMM Incorporated

Inventor： Saurabha Rangrao Tavildar ,  Tingfang Ji ,  Gavin Bernard Horn ,  Keiichi Kubota ,  Ravi Agarwal

IPC: H04W36/08 ,  H04W36/00 ,  H04W36/30

Abstract: Aspects of the present disclosure provide methods and apparatus for transmitting an uplink reference signal, receiving a keep alive (KA) command based, at least in part, on the uplink reference signal, and taking one or more actions to perform a handover to a non-serving base station (BS) in accordance with the KA command. Additionally, aspects provide methods and apparatus for receiving an uplink reference signal from a user equipment (UE), measuring the uplink reference signal, and transmitting a KA command to the UE based, at least in part, on the measured uplink reference signal. The KA command may be scrambled by an identifier associated with the UE. Additionally or alternatively, a cyclic prefix (CP) of the uplink reference signal may be longer than a CP of another type of reference signal.

公开(公告)号：US10694498B2

公开(公告)日：2020-06-23

申请号：US15192556

申请日：2016-06-24

Applicant: QUALCOMM Incorporated

Inventor： Piyush Gupta ,  Junyi Li ,  Saurabha Rangrao Tavildar

IPC: H04W72/04 ,  H04B7/155 ,  H04W56/00 ,  H04L1/18 ,  H04W28/02 ,  H04W88/02

Abstract: Methods, systems, and devices for wireless communication are described. The methods, systems, and devices may include receiving control information from a serving station, synchronizing with an end device based at least in part on the control information received from the serving station, and receiving an acknowledgement (ACK) from the end device in response to the synchronizing, the ACK indicating the end device is synchronized with the relay device. The methods, systems, and devices may also include receiving a data packet from the end device subsequent to the synchronizing, and transmitting, to the serving station, the data packet received from the end device, the transmitting based at least in part on the control information received from the serving station.

公开(公告)号：US09973980B2

公开(公告)日：2018-05-15

申请号：US13787544

申请日：2013-03-06

Applicant: QUALCOMM Incorporated

Inventor： Junyi Li ,  Nilesh Nilkanth Khude ,  Saurabha Rangrao Tavildar ,  Vincent Douglas Park

IPC: H04W36/00 ,  H04L5/00 ,  H04W16/00 ,  H04B17/318 ,  H04W36/30 ,  H04W84/04 ,  H04B17/309

CPC classification number: H04W36/0055 ,  H04B17/309 ,  H04B17/318 ,  H04L5/0051 ,  H04L5/0057 ,  H04W16/00 ,  H04W36/30 ,  H04W84/045

Abstract: Methods and apparatus that facilitate handover related measurements and decision making in a communications system including user equipment (UE) devices, a macro base station and femto base stations (femtocells) are described. In some embodiments a UE device transmits pilots along with identification information using UE device selected transmission resources from a set of recurring UE pilot transmission resources dedicated by a macro base station for UE pilot signal and related device information transmission purposes. Femto base stations measure the UE transmitted pilot signals and report the signal strength measurement results and corresponding device identifiers to a handoff decision control entity, e.g., an eNodeB or control node, which makes handover decisions. By relying on UE transmitted pilots measured by multiple base stations, e.g., femto base stations, the need for femto cells to transmit pilots can be reduced while well informed UE handoff decisions still being possible.

公开(公告)号：US09967890B2

公开(公告)日：2018-05-08

申请号：US14191334

申请日：2014-02-26

Applicant: QUALCOMM Incorporated

Inventor： Qiao Li ,  Saurabha Rangrao Tavildar ,  Bilal Sadiq

IPC: H04W4/00 ,  H04W72/08 ,  G06F17/50 ,  H01L27/02 ,  H04W72/04 ,  H01L27/092

CPC classification number: H04W72/082 ,  G06F17/5072 ,  H01L27/0207 ,  H01L27/092 ,  H04W72/0453

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus determines a subset of subchannels for a first cell, the subset of subchannels configured to reduce interference to at least a second UE in a second cell, determines whether a first UE in the first cell is interfering with a second UE in a second cell, and allocates at least one subchannel to the first UE from the subset of subchannels when the first UE in the first cell is interfering with the second UE in the second cell.

公开(公告)号：US09955460B2

公开(公告)日：2018-04-24

申请号：US15159756

申请日：2016-05-19

Applicant: QUALCOMM Incorporated

Inventor： Saurabha Rangrao Tavildar ,  Shailesh Patil ,  Kapil Gulati ,  Sudhir Kumar Baghel ,  Libin Jiang

IPC: H04W72/04 ,  H04L5/00 ,  H04B7/26 ,  H04W4/00 ,  H04W72/12 ,  H04W88/02

CPC classification number: H04W72/04 ,  H04B7/2615 ,  H04L5/0044 ,  H04L5/0053 ,  H04W4/70 ,  H04W72/12 ,  H04W88/02

Abstract: In one aspect of this disclosure, control information and data are carried in the same subframe in order to reduce control overhead. A method, an apparatus, and a computer-readable medium for wireless communication are provided. The apparatus may be a first UE. The first UE determines a data block to be transmitted to a second UE. The first UE determines a first resource in a subframe for carrying the data block and determines a second resource in the subframe for carrying control information associated with transmitting the data block. The first UE transmits the data block and the control information to the second UE in a device-to-device communication channel on the determined first and second resources, respectively.

公开(公告)号：US09918244B2

公开(公告)日：2018-03-13

申请号：US15042348

申请日：2016-02-12

Applicant: QUALCOMM Incorporated

Inventor： Kapil Gulati ,  Sudhir Kumar Baghel ,  Saurabha Rangrao Tavildar ,  Shailesh Patil

IPC: H04W24/08 ,  H04W4/00 ,  H04B17/29

CPC classification number: H04W24/08 ,  H04B17/29 ,  H04W4/70

Abstract: Improved methods, systems, or apparatuses for UE equipment testing for D2D enabled UEs may include determining performance metrics based on one or more of received transport blocks (TBs) or received service data units (SDUs) from the received one or more data channels on a per channel basis, and reporting the determined performance metric(s) on a per channel basis. In some examples, the performance metrics may include a count of a number of TBs or SDUs successfully received at a channel.

公开(公告)号：US09706482B2

公开(公告)日：2017-07-11

申请号：US14281805

申请日：2014-05-19

Applicant: QUALCOMM Incorporated

Inventor： Kapil Gulati ,  Shailesh Patil ,  Peter Gaal ,  Saurabha Rangrao Tavildar ,  Junyi Li ,  Georgios Tsirtsis

IPC: H04W48/16 ,  H04W56/00 ,  H04W72/04 ,  H04W48/12 ,  H04W8/00

CPC classification number: H04W48/16 ,  H04W8/005 ,  H04W48/12 ,  H04W56/001 ,  H04W72/042 ,  H04W72/0446

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives information from a serving base station and at least one neighboring base station. The information indicates a time allocation of discovery resources allocated by each of the serving base station and the at least one neighboring base station for performing direct discovery. The apparatus further determines a subframe timing of the serving base station and the at least one neighboring base station, and performs direct discovery using the time allocation of the discovery resources allocated by each of the serving base station and the at least one neighboring base station based on a determined subframe timing of the serving base station or a neighboring base station corresponding to the discovery resources.

公开(公告)号：US20170171877A1

公开(公告)日：2017-06-15

申请号：US15192705

申请日：2016-06-24

Applicant: QUALCOMM Incorporated

Inventor： Hua Wang ,  Tingfang Ji ,  Naga Bhushan ,  Junyi Li ,  Saurabha Rangrao Tavildar

IPC: H04W72/12

CPC classification number: H04W72/1263 ,  H04L5/001 ,  H04L5/003 ,  H04L5/0035 ,  H04L5/0073 ,  H04L5/0094 ,  H04L5/0096 ,  H04L5/14 ,  H04W72/1294

Abstract: Methods, systems, and apparatuses are described for wireless communication at a cell. The cell may transmit, from the cell to a plurality of neighboring cells, a frame configuration message. The frame configuration message may identify the current frame as a switching frame capable of dynamically switching a communication direction. The cell may switch, based at least in part on the frame configuration message, a communication direction between the cell and a user equipment (UE) for at least a portion of the current frame. The cell may communicate with the UE during the current frame according to the switched communication direction.

公开(公告)号：US09621289B2

公开(公告)日：2017-04-11

申请号：US14586523

申请日：2014-12-30

Applicant: QUALCOMM Incorporated

Inventor： Saurabha Rangrao Tavildar ,  Thomas Joseph Richardson ,  Junyi Li

IPC: H04J3/06 ,  H04W56/00

CPC classification number: H04J3/0664 ,  H04J3/0641 ,  H04W56/00 ,  H04W56/0015 ,  H04W56/0035

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in connection with enabling distributed frequency synchronization based on a fastest node clock rate. In one example, a first UE is equipped to determine that a fastest clock rate is faster than an internal clock rate of the first UE by more than a first positive offset, and adjust the internal clock rate based on the determined fastest clock rate. In an aspect, the fastest clock rate is associated with a second UE of one or more other UEs from which synchronization signals may be received. In another example, a UE is equipped to obtain GPS based timing information, adjust an internal clock rate based on the GPS based timing information, and transmit a synchronization signal at an artificially earlier time in comparison to a scheduled time of transmission associated with the adjusted internal clock rate.

公开(公告)号：US09609680B2

公开(公告)日：2017-03-28

申请号：US14608819

申请日：2015-01-29

Applicant: QUALCOMM Incorporated

Inventor： Sudhir Kumar Baghel ,  Saurabha Rangrao Tavildar ,  Shailesh Patil ,  Kapil Gulati ,  Haris Zisimopoulos

IPC: H04M11/00 ,  H04W76/02 ,  H04W4/08 ,  H04W36/00 ,  H04W72/04 ,  H04W88/10 ,  H04W76/00 ,  H04L29/06 ,  H04W12/08

CPC classification number: H04W76/14 ,  H04L63/104 ,  H04W4/06 ,  H04W4/08 ,  H04W12/06 ,  H04W12/08 ,  H04W36/00 ,  H04W36/0016 ,  H04W72/04 ,  H04W72/0406 ,  H04W76/40 ,  H04W88/10

Abstract: Methods, systems, and devices are described for device-to-device (D2D) wireless communication. A device may transmit an initiation message to a base station indicating that the device desires to initiate a D2D communication session. The device may then receive a response from the base station that includes parameters for configuration of the D2D session. When it has data to send to another device, the device may transmit buffer status report (BSR) to the base station. The base station may respond with a grant of D2D scheduling assignment (SA) configured according to the previously sent parameters. For example, the message may be scrambled with a D2D temporary identity sequence. In some cases, the device may transmit a group identification (ID) code to the base station, and the group ID may be associated with an index, so an SA for that group can be reference by index.